Tk Source Code

    Tk_ItemTranslateProc *\fItranslateProc\fR;
    Tk_ItemIndexProc *\fIindexProc\fR;
    Tk_ItemCursorProc *\fIicursorProc\fR;
    Tk_ItemSelectionProc *\fIselectionProc\fR;
    Tk_ItemInsertProc *\fIinsertProc\fR;
    Tk_ItemDCharsProc *\fIdCharsProc\fR;
    Tk_ItemType *\fInextPtr\fR;



} \fBTk_ItemType\fR;
.CE
.PP
The fields of a Tk_ItemType structure are described in more detail
later in this manual entry.
When \fBTk_CreateItemType\fR is called, its \fItypePtr\fR
argument must point to a structure with all of the fields initialized
................................................................................
.CE
.PP
The \fIcanvas\fR and \fIitemPtr\fR arguments have the usual meaning,
and \fIdeltaX\fR and \fIdeltaY\fR give the amounts that should be
added to each x and y coordinate within the item.
The type manager should adjust the item's coordinates and
update the bounding box in the item's header.








































.SS INDEXPROC
.PP
\fItypePtr\->indexProc\fR is invoked by Tk to translate a string
index specification into a numerical index, for example during the
\fBindex\fR widget command.
It is only relevant for item types that support indexable text or coordinates;
\fItypePtr\->indexProc\fR may be specified as NULL for non-textual

    Tk_ItemTranslateProc *\fItranslateProc\fR;
    Tk_ItemIndexProc *\fIindexProc\fR;
    Tk_ItemCursorProc *\fIicursorProc\fR;
    Tk_ItemSelectionProc *\fIselectionProc\fR;
    Tk_ItemInsertProc *\fIinsertProc\fR;
    Tk_ItemDCharsProc *\fIdCharsProc\fR;
    Tk_ItemType *\fInextPtr\fR;
.VS "8.7, TIP164"
    Tk_ItemRotateProc *\fIrotateProc\fR;
.VE "8.7, TIP164"
} \fBTk_ItemType\fR;
.CE
.PP
The fields of a Tk_ItemType structure are described in more detail
later in this manual entry.
When \fBTk_CreateItemType\fR is called, its \fItypePtr\fR
argument must point to a structure with all of the fields initialized
................................................................................
.CE
.PP
The \fIcanvas\fR and \fIitemPtr\fR arguments have the usual meaning,
and \fIdeltaX\fR and \fIdeltaY\fR give the amounts that should be
added to each x and y coordinate within the item.
The type manager should adjust the item's coordinates and
update the bounding box in the item's header.
.SS ROTATEPROC
.VS "8.7, TIP164"
.PP
\fItypePtr\->rotateProc\fR is invoked by Tk to rotate a canvas item
during the \fBrotate\fR widget command.
The procedure must match the following prototype:
.PP
.CS
typedef void \fBTk_ItemRotateProc\fR(
        Tk_Canvas \fIcanvas\fR,
        Tk_Item *\fIitemPtr\fR,
        double \fIoriginX\fR,
        double \fIoriginY\fR,
        double \fIangleRad\fR);
.CE
.PP
The \fIcanvas\fR and \fIitemPtr\fR arguments have the usual meaning.
\fIoriginX\fR and \fIoriginY\fR specify an origin relative to which
the item is to be rotated, and \fIangleRad\fR gives the anticlockwise
rotation to be applied in radians.
The item should adjust the coordinates of its control points so that where
they used to have coordinates \fIx\fR and \fIy\fR, they will have new
coordinates \fIx\(fm\fR and \fIy\(fm\fR, where
.PP
.CS
\fIrelX\fR = \fIx\fR - \fIoriginX\fR
\fIrelY\fR = \fIy\fR - \fIoriginY\fR
\fIx\(fm\fR = \fIoriginX\fR + \fIrelX\fR \(mu cos(\fIangleRad\fR) + \fIrelY\fR \(mu sin(\fIangleRad\fR)
\fIy\(fm\fR = \fIoriginY\fR \(mi \fIrelX\fR \(mu sin(\fIangleRad\fR) + \fIrelY\fR \(mu cos(\fIangleRad\fR)
.CE
.PP
The control points for an item are not necessarily the coordinates provided to
the item when it is created (or via the \fItypePtr\->coordProc\fR), but could
instead be derived from them.
\fIrotateProc\fR must also update the bounding box in the item's header.
.PP
Item types do not need to provide a \fItypePtr\->rotateProc\fR. If the
\fItypePtr\->rotateProc\fR is NULL, the \fItypePtr\->coordProc\fR will be
used instead to retrieve and update the list of coordinates.
.VE "8.7, TIP164"
.SS INDEXPROC
.PP
\fItypePtr\->indexProc\fR is invoked by Tk to translate a string
index specification into a numerical index, for example during the
\fBindex\fR widget command.
It is only relevant for item types that support indexable text or coordinates;
\fItypePtr\->indexProc\fR may be specified as NULL for non-textual

.SH NAME
Tk_GetScrollInfoObj, Tk_GetScrollInfo \- parse arguments for scrolling commands
.SH SYNOPSIS
.nf
\fB#include <tk.h>\fR
.sp
int
\fBTk_GetScrollInfoObj(\fIinterp, objc, objv, dblPtr, intPtr\fB)\fR
.sp
int
\fBTk_GetScrollInfo(\fIinterp, argc, argv, dblPtr, intPtr\fB)\fR
.SH ARGUMENTS
.AS "Tcl_Interp" *fractionPtr
.AP Tcl_Interp *interp in
Interpreter to use for error reporting.
.AP int objc in
Number of Tcl_Obj's in \fIobjv\fR array.
.AP "Tcl_Obj *const" objv[] in

.SH NAME
Tk_GetScrollInfoObj, Tk_GetScrollInfo \- parse arguments for scrolling commands
.SH SYNOPSIS
.nf
\fB#include <tk.h>\fR
.sp
int
\fBTk_GetScrollInfoObj(\fIinterp, objc, objv, fractionPtr, stepsPtr\fB)\fR
.sp
int
\fBTk_GetScrollInfo(\fIinterp, argc, argv, fractionPtr, stepsPtr\fB)\fR
.SH ARGUMENTS
.AS "Tcl_Interp" *fractionPtr
.AP Tcl_Interp *interp in
Interpreter to use for error reporting.
.AP int objc in
Number of Tcl_Obj's in \fIobjv\fR array.
.AP "Tcl_Obj *const" objv[] in

It is possible to adjust the origin of the canvas
coordinate system relative to the origin of the window using the
\fBxview\fR and \fByview\fR widget commands; this is typically used
for scrolling.
Canvases do not support scaling or rotation of the canvas coordinate
system relative to the window coordinate system.
.PP
Individual items may be moved or scaled using widget commands




described below, but they may not be rotated.
.PP
Note that the default origin of the canvas's visible area is
coincident with the origin for the whole window as that makes bindings
using the mouse position easier to work with; you only need to use the
\fBcanvasx\fR and \fBcanvasy\fR widget commands if you adjust the
origin of the visible area. However, this also means that any focus
ring (as controlled by the \fB\-highlightthickness\fR option) and
................................................................................
factor can also be given and the photo image will be enlarged. The image background
will be filled with the canvas background colour. The canvas widget does not need to
be mapped for this widget command to work, but at least one of it's ancestors must be
mapped.
This command returns an empty string.
.TP
\fIpathName \fBimove \fItagOrId index x y\fR
.VS 8.6
This command causes the \fIindex\fR'th coordinate of each of the items
indicated by \fItagOrId\fR to be relocated to the location (\fIx\fR,\fIy\fR).
Each item interprets \fIindex\fR independently according to the rules
described in \fBINDICES\fR above. Out of the standard set of items, only line
and polygon items may have their coordinates relocated this way.
.VE 8.6
.TP
\fIpathName \fBindex \fItagOrId index\fR
.
This command returns a decimal string giving the numerical index
within \fItagOrId\fR corresponding to \fIindex\fR.
\fIIndex\fR gives a textual description of the desired position
as described in \fBINDICES\fR above.
................................................................................
Move each of the items given by \fItagOrId\fR in the canvas coordinate
space by adding \fIxAmount\fR to the x-coordinate of each point
associated with the item and \fIyAmount\fR to the y-coordinate of
each point associated with the item.
This command returns an empty string.
.TP
\fIpathName \fBmoveto \fItagOrId xPos yPos\fR
.VS 8.6
Move the items given by \fItagOrId\fR in the canvas coordinate
space so that the first coordinate pair of the bottommost item with
tag \fItagOrId\fR is located at
position (\fIxPos\fR,\fIyPos\fR). \fIxPos\fR and \fIyPos\fR may be
the empty string, in which case the corresponding coordinate
will be unchanged. All items matching
\fItagOrId\fR remain in the same positions relative to each other.
This command returns an empty string.
.VE 8.6
.TP
\fIpathName \fBpostscript \fR?\fIoption value option value ...\fR?
.
Generate a Postscript representation for part or all of the canvas.
If the \fB\-file\fR option is specified then the Postscript is written
to a file and an empty string is returned; otherwise the Postscript
is returned as the result of the command.
................................................................................
Note: this command has no effect on window items. Window items always
obscure other item types, and the stacking order of window items is
determined by the \fBraise\fR command and \fBlower\fR command, not the
\fBraise\fR widget command and \fBlower\fR widget command for canvases.
.RE
.TP
\fIpathName \fBrchars \fItagOrId first last string\fR
.VS 8.6
This command causes the text or coordinates between \fIfirst\fR and \fIlast\fR
for each of the items indicated by \fItagOrId\fR to be replaced by
\fIstring\fR. Each item interprets \fIfirst\fR and \fIlast\fR independently
according to the rules described in \fBINDICES\fR above. Out of the standard
set of items, text items support this operation by altering their text as
directed, and line and polygon items support this operation by altering their
coordinate list (in which case \fIstring\fR should be a list of coordinates to
use as a replacement). The other items ignore this operation.
.VE 8.6




















.TP
\fIpathName \fBscale \fItagOrId xOrigin yOrigin xScale yScale\fR
.
Rescale the coordinates of all of the items given by \fItagOrId\fR in canvas
coordinate space.
\fIXOrigin\fR and \fIyOrigin\fR identify the origin for the scaling
operation and \fIxScale\fR and \fIyScale\fR identify the scale
................................................................................
\fB\-stipple\fR	\fB\-activestipple\fR
\fB\-disabledstipple\fR	\fB\-state\fR
\fB\-tags\fR
.DE
The following extra options are supported for text items:
.TP
\fB\-angle \fIrotationDegrees\fR
.VS 8.6
\fIRotationDegrees\fR tells how many degrees to rotate the text anticlockwise
about the positioning point for the text; it may have any floating-point value
from 0.0 to 360.0. For example, if \fIrotationDegrees\fR is \fB90\fR, then the
text will be drawn vertically from bottom to top.
This option defaults to \fB0.0\fR.
.VE 8.6
.TP
\fB\-font \fIfontName\fR
Specifies the font to use for the text item.
\fIFontName\fR may be any string acceptable to \fBTk_GetFont\fR.
If this option is not specified, it defaults to a system-dependent
font.
.TP

It is possible to adjust the origin of the canvas
coordinate system relative to the origin of the window using the
\fBxview\fR and \fByview\fR widget commands; this is typically used
for scrolling.
Canvases do not support scaling or rotation of the canvas coordinate
system relative to the window coordinate system.
.PP
Individual items may be moved, scaled
.VS "8.7, TIP164"
or rotated
.VE "8.7, TIP164"
using widget commands
described below.
.PP
Note that the default origin of the canvas's visible area is
coincident with the origin for the whole window as that makes bindings
using the mouse position easier to work with; you only need to use the
\fBcanvasx\fR and \fBcanvasy\fR widget commands if you adjust the
origin of the visible area. However, this also means that any focus
ring (as controlled by the \fB\-highlightthickness\fR option) and
................................................................................
factor can also be given and the photo image will be enlarged. The image background
will be filled with the canvas background colour. The canvas widget does not need to
be mapped for this widget command to work, but at least one of it's ancestors must be
mapped.
This command returns an empty string.
.TP
\fIpathName \fBimove \fItagOrId index x y\fR
.
This command causes the \fIindex\fR'th coordinate of each of the items
indicated by \fItagOrId\fR to be relocated to the location (\fIx\fR,\fIy\fR).
Each item interprets \fIindex\fR independently according to the rules
described in \fBINDICES\fR above. Out of the standard set of items, only line
and polygon items may have their coordinates relocated this way.

.TP
\fIpathName \fBindex \fItagOrId index\fR
.
This command returns a decimal string giving the numerical index
within \fItagOrId\fR corresponding to \fIindex\fR.
\fIIndex\fR gives a textual description of the desired position
as described in \fBINDICES\fR above.
................................................................................
Move each of the items given by \fItagOrId\fR in the canvas coordinate
space by adding \fIxAmount\fR to the x-coordinate of each point
associated with the item and \fIyAmount\fR to the y-coordinate of
each point associated with the item.
This command returns an empty string.
.TP
\fIpathName \fBmoveto \fItagOrId xPos yPos\fR
.
Move the items given by \fItagOrId\fR in the canvas coordinate
space so that the first coordinate pair of the bottommost item with
tag \fItagOrId\fR is located at
position (\fIxPos\fR,\fIyPos\fR). \fIxPos\fR and \fIyPos\fR may be
the empty string, in which case the corresponding coordinate
will be unchanged. All items matching
\fItagOrId\fR remain in the same positions relative to each other.
This command returns an empty string.

.TP
\fIpathName \fBpostscript \fR?\fIoption value option value ...\fR?
.
Generate a Postscript representation for part or all of the canvas.
If the \fB\-file\fR option is specified then the Postscript is written
to a file and an empty string is returned; otherwise the Postscript
is returned as the result of the command.
................................................................................
Note: this command has no effect on window items. Window items always
obscure other item types, and the stacking order of window items is
determined by the \fBraise\fR command and \fBlower\fR command, not the
\fBraise\fR widget command and \fBlower\fR widget command for canvases.
.RE
.TP
\fIpathName \fBrchars \fItagOrId first last string\fR
.
This command causes the text or coordinates between \fIfirst\fR and \fIlast\fR
for each of the items indicated by \fItagOrId\fR to be replaced by
\fIstring\fR. Each item interprets \fIfirst\fR and \fIlast\fR independently
according to the rules described in \fBINDICES\fR above. Out of the standard
set of items, text items support this operation by altering their text as
directed, and line and polygon items support this operation by altering their
coordinate list (in which case \fIstring\fR should be a list of coordinates to
use as a replacement). The other items ignore this operation.
.TP
\fIpathName \fBrotate \fItagOrId xOrigin yOrigin angle\fR
.VS "8.7, TIP164"
Rotate the coordinates of all of the items given by \fItagOrId\fR in canvas
coordinate space.
\fIXOrigin\fR and \fIyOrigin\fR identify the origin for the rotation
operation and \fIangle\fR identifies the amount to rotate the coordinates
anticlockwise, in degrees. (Negative values rotate clockwise.)
This command returns an empty string.
.RS
.PP
Implementation note: not all item types work the same with rotations. In
particular,\fB bitmap\fR,\fB image\fR,\fB text\fR and\fB window\fR items only
rotate their anchor points and do not rotate the items themselves about those
points, and the \fBarc\fR, \fBoval\fR and \fBrectangle\fR types rotate about a
computed center point instead of moving the bounding box coordinates directly.
.PP
Some items (currently \fBarc\R and\fB text\fR) have angles in their options;
this command \fIdoes not\fR affect those options.
.RE
.VE "8.7, TIP164"
.TP
\fIpathName \fBscale \fItagOrId xOrigin yOrigin xScale yScale\fR
.
Rescale the coordinates of all of the items given by \fItagOrId\fR in canvas
coordinate space.
\fIXOrigin\fR and \fIyOrigin\fR identify the origin for the scaling
operation and \fIxScale\fR and \fIyScale\fR identify the scale
................................................................................
\fB\-stipple\fR	\fB\-activestipple\fR
\fB\-disabledstipple\fR	\fB\-state\fR
\fB\-tags\fR
.DE
The following extra options are supported for text items:
.TP
\fB\-angle \fIrotationDegrees\fR
.
\fIRotationDegrees\fR tells how many degrees to rotate the text anticlockwise
about the positioning point for the text; it may have any floating-point value
from 0.0 to 360.0. For example, if \fIrotationDegrees\fR is \fB90\fR, then the
text will be drawn vertically from bottom to top.
This option defaults to \fB0.0\fR.

.TP
\fB\-font \fIfontName\fR
Specifies the font to use for the text item.
\fIFontName\fR may be any string acceptable to \fBTk_GetFont\fR.
If this option is not specified, it defaults to a system-dependent
font.
.TP

yellow4	139	139 	0
YellowGreen	154	205 	50
.DE
.SH "PORTABILITY ISSUES"
.TP
\fBMac OS X\fR
.
On Mac OS X, the following additional system colors are available
(note that the actual color values depend on the currently active OS theme,
and typically many of these will in fact be patterns rather than pure colors):

.RS
.DS
systemActiveAreaFill
systemAlertActiveText
systemAlertBackgroundActive
systemAlertBackgroundInactive
systemAlertInactiveText
................................................................................
systemRootMenuActiveText
systemRootMenuDisabledText
systemRootMenuSelectedText
systemScrollBarDelimiterActive
systemScrollBarDelimiterInactive
systemSecondaryGroupBoxBackground
systemSecondaryHighlightColor

systemSheetBackground
systemSheetBackgroundOpaque
systemSheetBackgroundTransparent
systemStaticAreaFill
systemSystemDetailText
systemTabFrontActiveText
systemTabFrontInactiveText
................................................................................
systemWhiteText
systemWindowBody
systemWindowHeaderActiveText
systemWindowHeaderBackground
systemWindowHeaderInactiveText
.DE
.RE































.TP


\fBWindows\fR
.
On Windows, the following additional system colors are available
(note that the actual color values depend on the currently active OS theme):
.RS
.DS
.ta 6c

yellow4	139	139 	0
YellowGreen	154	205 	50
.DE
.SH "PORTABILITY ISSUES"
.TP
\fBMac OS X\fR
.
On macOS, the following additional system colors are available.
This first group contains all colors available in the HIToolbox library.
(Note that in some cases the actual color values may depend on the
current Appearance.)
.RS
.DS
systemActiveAreaFill
systemAlertActiveText
systemAlertBackgroundActive
systemAlertBackgroundInactive
systemAlertInactiveText
................................................................................
systemRootMenuActiveText
systemRootMenuDisabledText
systemRootMenuSelectedText
systemScrollBarDelimiterActive
systemScrollBarDelimiterInactive
systemSecondaryGroupBoxBackground
systemSecondaryHighlightColor
systemSelectedTabTextColor
systemSheetBackground
systemSheetBackgroundOpaque
systemSheetBackgroundTransparent
systemStaticAreaFill
systemSystemDetailText
systemTabFrontActiveText
systemTabFrontInactiveText
................................................................................
systemWhiteText
systemWindowBody
systemWindowHeaderActiveText
systemWindowHeaderBackground
systemWindowHeaderInactiveText
.DE
.RE
.
The second group of MacOS colors below are based on Apple's "semantic"
NScolors.  On OSX 10.14 (Mojave) and later these colors change value
when Dark Mode is enabled.  However, the change is only observable
when the Apple window manager is drawing to the screen. So the
\fBwinfo rgb\fR command will return the color coordinates used in the
standard Aqua mode, even if Dark Mode has been selected in the system
preferences.  The numbered systemWindowBackgroundColors are used in
the \fBttk::notebook\fR and \fBttk::labelframe\fR widgets to provide a
contrasting background.  Each numbered color constrasts with its
predecessor.
.RS
.DS
systemControlAccentColor
systemControlTextColor
systemDisabledControlTextColor
systemLabelColor
systemSelectedTextBackgroundColor
systemSelectedTextColor
systemTextBackgroundColor
systemTextColor
systemWindowBackgroundColor
systemWindowBackgroundColor1
systemWindowBackgroundColor2
systemWindowBackgroundColor3
systemWindowBackgroundColor4
systemWindowBackgroundColor5
systemWindowBackgroundColor6
systemWindowBackgroundColor7
.DE
.RE
.TP


\fBWindows\fR
.
On Windows, the following additional system colors are available
(note that the actual color values depend on the currently active OS theme):
.RS
.DS
.ta 6c

\fBpng \-alpha\fI alphaValue\fR
.
The option has effect when reading image data from a file. Specifies
an additional alpha filtering for the overall image, which allows the
background on which the image is displayed to show through.  This
usually also has the effect of desaturating the image.  The
\fIalphaValue\fR must be between 0.0 and 1.0.





















































.VE 8.6
.VS 8.7
.SH "COLOR FORMATS"
.PP
The default image handler can represent/parse color and alpha values
of a pixel in one of the formats listed below. If a color format does
not contain transparency information, full opacity is assumed.  The

\fBpng \-alpha\fI alphaValue\fR
.
The option has effect when reading image data from a file. Specifies
an additional alpha filtering for the overall image, which allows the
background on which the image is displayed to show through.  This
usually also has the effect of desaturating the image.  The
\fIalphaValue\fR must be between 0.0 and 1.0.
.TP
\fBsvg \-dpi\fI dpiValue\fB \-scale\fI scaleValue\fB \-unit\fI unitValue\fR
.
\fIdpiValue\fR is used in conversion between given coordinates and
screen resolution. The value must be greater than 0 and the default
value is 96.
\fIscaleValue\fR is used to scale the resulting image. The value must
be greater than 0 and the default value is 1.
\fIunitValue\fR is the unit of all coordinates in the SVG data.
Available units are px (default, coordinates in pixel), pt (1/72 inch),
pc (12 pt), mm , cm and in.
The svg format supports a wide range of SVG features, but the
full SVG standard is not available, for instance the 'text' feature
is missing and silently ignores when reading the SVG data.
The supported SVG features are:
.
.RS
\fB elements:\fR g, path, rect, circle, ellipse, line, polyline, polygon,
linearGradient, radialGradient, stop, defs, svg, style
.PP
\fB attributes:\fR width, height, viewBox,
preserveAspectRatio with none, xMin, xMid, xMax, yMin, yMid, yMax, slice
.PP
\fB gradient attributes:\fR gradientUnits with objectBoundingBox,
gradientTransform, cx, cy, r fx, fy x1, y1, x2, y2
spreadMethod with pad, reflect or repeat,
xlink:href
.PP
\fB poly attributes: \fR points
.PP
\fB line attributes: \fR x1, y1, x2, y2
.PP
\fB ellipse attributes: \fR cx, cy, rx, ry
.PP
\fB circle attributes: \fR cx, cy, r
.PP
\fB rectangle attributes: \fR x, y, width, height, rx, ry
.PP
\fB path attributes: \fR d with m, M, l, L, h, H, v, V, c, C, s, S, q, Q, t, T, a, A, z, Z
.PP
\fB style attributes: \fR display with none, visibility, hidden, visible,
fill with nonzero and evenodd, opacity, fill-opacity,
stroke, stroke-width, stroke-dasharray, stroke-dashoffset, stroke-opacity,
stroke-linecap with butt, round and square,
stroke-linejoin with miter, round and  bevel, stroke-miterlimit
fill-rule, font-size,
transform with matrix, translate, scale, rotate, skewX and  skewY,
stop-color, stop-opacity, offset, id, class
.RE
.
Currently only SVG images reading and conversion into (pixel-based
format) photos is supported: Tk does not (yet) support bundling photo
images in SVG vector graphics.
.VE 8.6
.VS 8.7
.SH "COLOR FORMATS"
.PP
The default image handler can represent/parse color and alpha values
of a pixel in one of the formats listed below. If a color format does
not contain transparency information, full opacity is assumed.  The

.PP
Dynamic states: \fBdisabled\fP, \fBfocus\fP, \fBpressed\fP, \fBreadonly\fP.
.PP
\fBTCombobox\fP styling options configurable with \fBttk::style\fP
are:
.PP
\fB\-arrowcolor\fP \fIcolor\fP


.br
\fB\-background\fP \fIcolor\fP
.br
\fB\-bordercolor\fP \fIcolor\fP
.br
\fB\-darkcolor\fP \fIcolor\fP
.br

.PP
Dynamic states: \fBdisabled\fP, \fBfocus\fP, \fBpressed\fP, \fBreadonly\fP.
.PP
\fBTCombobox\fP styling options configurable with \fBttk::style\fP
are:
.PP
\fB\-arrowcolor\fP \fIcolor\fP
.br
\fB\-arrowsize\fP \fIamount\fP
.br
\fB\-background\fP \fIcolor\fP
.br
\fB\-bordercolor\fP \fIcolor\fP
.br
\fB\-darkcolor\fP \fIcolor\fP
.br

.TP
\fIpathName \fBvalidate\fR
Force revalidation, independent of the conditions specified
by the \fB\-validate\fR option.
Returns 0 if validation fails, 1 if it succeeds.
Sets or clears the \fBinvalid\fR state accordingly.
See \fBVALIDATION\fR below for more details.
.TP
\fIpathName \fBxview \fIargs\fR
This command is used to query and change the horizontal position of the
text in the widget's window.  It can take any of the following
forms:
.RS
.TP
\fIpathName \fBxview\fR
Returns a list containing two elements.
Each element is a real fraction between 0 and 1; together they describe
the horizontal span that is visible in the window.
For example, if the first element is .2 and the second element is .6,
20% of the entry's text is off-screen to the left, the middle 40% is visible
in the window, and 40% of the text is off-screen to the right.
These are the same values passed to scrollbars via the \fB\-xscrollcommand\fR
option.
.TP
\fIpathName \fBxview\fR \fIindex\fR
Adjusts the view in the window so that the character given by \fIindex\fR
is displayed at the left edge of the window.
.TP
\fIpathName \fBxview moveto\fI fraction\fR
Adjusts the view in the window so that the character \fIfraction\fR of the
way through the text appears at the left edge of the window.
\fIFraction\fR must be a fraction between 0 and 1.
.TP
\fIpathName \fBxview scroll \fInumber what\fR
This command shifts the view in the window left or right according to
\fInumber\fR and \fIwhat\fR.
\fINumber\fR must be an integer.
\fIWhat\fR must be either \fBunits\fR or \fBpages\fR.
'\" or an abbreviation of one of these, but we don't document that.
If \fIwhat\fR is \fBunits\fR, the view adjusts left or right by
\fInumber\fR average-width characters on the display;  if it is
\fBpages\fR then the view adjusts by \fInumber\fR screenfuls.
If \fInumber\fR is negative then characters farther to the left
become visible;  if it is positive then characters farther to the right
become visible.
.RE
.PP
The entry widget also supports the following generic \fBttk::widget\fR
widget subcommands (see \fIttk::widget(n)\fR for details):
.DS
.ta 5.5c 11c
\fBcget\fR	\fBconfigure\fR	\fBidentify\fR
\fBinstate\fR	\fBstate\fR
.DE
.SH VALIDATION
.PP
The \fB\-validate\fR, \fB\-validatecommand\fR, and \fB\-invalidcommand\fR
options are used to enable entry widget validation.
.SS "VALIDATION MODES"
.PP

.TP
\fIpathName \fBvalidate\fR
Force revalidation, independent of the conditions specified
by the \fB\-validate\fR option.
Returns 0 if validation fails, 1 if it succeeds.
Sets or clears the \fBinvalid\fR state accordingly.
See \fBVALIDATION\fR below for more details.







































.PP
The entry widget also supports the following generic \fBttk::widget\fR
widget subcommands (see \fIttk::widget(n)\fR for details):
.DS
.ta 5.5c 11c
\fBcget\fR	\fBconfigure\fR	\fBidentify\fR
\fBinstate\fR	\fBstate\fR	\fBxview\fR
.DE
.SH VALIDATION
.PP
The \fB\-validate\fR, \fB\-validatecommand\fR, and \fB\-invalidcommand\fR
options are used to enable entry widget validation.
.SS "VALIDATION MODES"
.PP

\fIpathName \fBcoords \fR?\fIvalue\fR?
.
Get the coordinates corresponding to \fIvalue\fR, or the coordinates
corresponding to the current value of the \fB\-value\fR option if \fIvalue\fR
is omitted.
.SH "STYLING OPTIONS"
.PP
The class name for a \fBttk::scale\fP is \fBTProgressbar\fP.
.PP
Dynamic states: \fBactive\fP.
.PP
\fBTProgressbar\fP styling options configurable with \fBttk::style\fP
are:
.PP
\fB\-background\fP \fIcolor\fP

\fIpathName \fBcoords \fR?\fIvalue\fR?
.
Get the coordinates corresponding to \fIvalue\fR, or the coordinates
corresponding to the current value of the \fB\-value\fR option if \fIvalue\fR
is omitted.
.SH "STYLING OPTIONS"
.PP
The class name for a \fBttk::scale\fP is \fBTScale\fP.
.PP
Dynamic states: \fBactive\fP.
.PP
\fBTProgressbar\fP styling options configurable with \fBttk::style\fP
are:
.PP
\fB\-background\fP \fIcolor\fP

\fIfirst\fR and \fIlast\fR are real fractions between 0 and 1.
.TP
\fIpathName \fBstate\fR ?\fIstateSpec\fR?
Modify or query the widget state; see \fIttk::widget(n)\fR.
.SH "INTERNAL COMMANDS"
.PP
The following widget commands are used internally
by the TScrollbar widget class bindings.
.TP
\fIpathName \fBdelta \fIdeltaX deltaY\fR
Returns a real number indicating the fractional change in
the scrollbar setting that corresponds to a given change
in thumb position.  For example, if the scrollbar is horizontal,
the result indicates how much the scrollbar setting must change
to move the thumb \fIdeltaX\fR pixels to the right (\fIdeltaY\fR is
................................................................................
ttk::scrollbar $f.vsb \-orient vertical \-command [list $f.t yview]
text $f.t \-xscrollcommand [list $f.hsb set] \-yscrollcommand [list $f.vsb set]
grid $f.t \-row 0 \-column 0 \-sticky nsew
grid $f.vsb \-row 0 \-column 1 \-sticky nsew
grid $f.hsb \-row 1 \-column 0 \-sticky nsew
grid columnconfigure $f 0 \-weight 1
grid rowconfigure $f 0 \-weight 1

.CE
.SH "STYLING OPTIONS"
.PP
The class name for a \fBttk::scrollbar\fP is \fBTScrollbar\fP.
.PP
Dynamic states: \fBactive\fP, \fBdisabled\fP.
.PP


\fBTScrollbar\fP styling options configurable with \fBttk::style\fP
are:
.PP
\fB\-arrowcolor\fP \fIcolor\fP


.br
\fB\-background\fP \fIcolor\fP
.br
\fB\-bordercolor\fP \fIcolor\fP
.br
\fB\-darkcolor\fP \fIcolor\fP
.br
\fB\-foreground\fP \fIcolor\fP
.br


\fB\-lightcolor\fP \fIcolor\fP
.br
\fB\-troughcolor\fP \fIcolor\fP
.PP
Some options are only available for specific themes.
.PP
See the \fBttk::style\fP manual page for information on how to configure
ttk styles.

\fIfirst\fR and \fIlast\fR are real fractions between 0 and 1.
.TP
\fIpathName \fBstate\fR ?\fIstateSpec\fR?
Modify or query the widget state; see \fIttk::widget(n)\fR.
.SH "INTERNAL COMMANDS"
.PP
The following widget commands are used internally
by the \fBTScrollbar\fP widget class bindings.
.TP
\fIpathName \fBdelta \fIdeltaX deltaY\fR
Returns a real number indicating the fractional change in
the scrollbar setting that corresponds to a given change
in thumb position.  For example, if the scrollbar is horizontal,
the result indicates how much the scrollbar setting must change
to move the thumb \fIdeltaX\fR pixels to the right (\fIdeltaY\fR is
................................................................................
ttk::scrollbar $f.vsb \-orient vertical \-command [list $f.t yview]
text $f.t \-xscrollcommand [list $f.hsb set] \-yscrollcommand [list $f.vsb set]
grid $f.t \-row 0 \-column 0 \-sticky nsew
grid $f.vsb \-row 0 \-column 1 \-sticky nsew
grid $f.hsb \-row 1 \-column 0 \-sticky nsew
grid columnconfigure $f 0 \-weight 1
grid rowconfigure $f 0 \-weight 1
pack $f
.CE
.SH "STYLING OPTIONS"
.PP
The class name for a \fBttk::scrollbar\fP is \fBTScrollbar\fP.
.PP
Dynamic states: \fBactive\fP, \fBdisabled\fP.
.PP
\fBTScrollbar\fP (or more specifically \fBVertical.TScrollbar\fP and
\fBHorizontal.TScrollbar\fP) styling options that are configurable with
\fBttk::style\fP are:

.PP
\fB\-arrowcolor\fP \fIcolor\fP
.br
\fB\-arrowsize\fP \fIamount\fP
.br
\fB\-background\fP \fIcolor\fP
.br
\fB\-bordercolor\fP \fIcolor\fP
.br
\fB\-darkcolor\fP \fIcolor\fP (color of the dark part of the 3D relief)
.br
\fB\-foreground\fP \fIcolor\fP
.br
\fB\-gripcount\fP \fIcount\fP (number of lines on the thumb)
.br
\fB\-lightcolor\fP \fIcolor\fP (color of the light part of the 3D relief)
.br
\fB\-troughcolor\fP \fIcolor\fP
.PP
Some options are only available for specific themes.
.PP
See the \fBttk::style\fP manual page for information on how to configure
ttk styles.

.TP
\fIpathName \fBtag remove \fItag\fR ?\fIitems\fR?
Removes the specified \fItag\fR from each of the listed \fIitems\fR.
If \fIitems\fR is omitted, removes \fItag\fR from each item in the tree.
If \fItag\fR is not present for a particular item,
then the \fB\-tags\fR for that item are unchanged.
.RE
.TP
\fIpathName \fBxview \fIargs\fR
Standard command for horizontal scrolling; see \fIwidget(n)\fR.
.TP
\fIpathName \fByview \fIargs\fR
Standard command for vertical scrolling; see \fIttk::widget(n)\fR.

.SH "ITEM OPTIONS"
.PP
The following item options may be specified for items
in the \fBinsert\fR and \fBitem\fR widget commands.
.OP \-text text Text
The textual label to display for the item.
.OP \-image image Image

.TP
\fIpathName \fBtag remove \fItag\fR ?\fIitems\fR?
Removes the specified \fItag\fR from each of the listed \fIitems\fR.
If \fIitems\fR is omitted, removes \fItag\fR from each item in the tree.
If \fItag\fR is not present for a particular item,
then the \fB\-tags\fR for that item are unchanged.
.RE
.PP
The treeview widget also supports the following generic \fBttk::widget\fR
widget subcommands (see \fIttk::widget(n)\fR for details):
.DS
.ta 5.5c 11c
\fBxview\fR	\fByview\fR
.DE
.SH "ITEM OPTIONS"
.PP
The following item options may be specified for items
in the \fBinsert\fR and \fBitem\fR widget commands.
.OP \-text text Text
The textual label to display for the item.
.OP \-image image Image

set changes [\fIpathName \fRstate \fIspec\fR]
\fIpathName \fRstate $changes
.CE
will restore \fIpathName\fR to the original state.
If \fIstateSpec\fR is not specified,
returns a list of the currently-enabled state flags.
.RE














































































.SH "WIDGET STATES"
The widget state is a bitmap of independent state flags.
Widget state flags include:
.TP
\fBactive\fR
.
The mouse cursor is over the widget

set changes [\fIpathName \fRstate \fIspec\fR]
\fIpathName \fRstate $changes
.CE
will restore \fIpathName\fR to the original state.
If \fIstateSpec\fR is not specified,
returns a list of the currently-enabled state flags.
.RE
.TP
\fIpathName \fBxview \fIargs\fR
This command is used to query and change the horizontal position of the
content in the widget's window.  It can take any of the following
forms:
.RS
.TP
\fIpathName \fBxview\fR
Returns a list containing two elements.
Each element is a real fraction between 0 and 1; together they describe
the horizontal span that is visible in the window.
For example, if the first element is .2 and the second element is .6,
20% of the widget's content is off-screen to the left, the middle 40% is visible
in the window, and 40% of the content is off-screen to the right.
These are the same values passed to scrollbars via the \fB\-xscrollcommand\fR
option.
.TP
\fIpathName \fBxview\fR \fIindex\fR
Adjusts the view in the window so that the content given by \fIindex\fR
is displayed at the left edge of the window.
.TP
\fIpathName \fBxview moveto\fI fraction\fR
Adjusts the view in the window so that the character \fIfraction\fR of the
way through the content appears at the left edge of the window.
\fIFraction\fR must be a fraction between 0 and 1.
.TP
\fIpathName \fBxview scroll \fInumber what\fR
This command shifts the view in the window left or right according to
\fInumber\fR and \fIwhat\fR.
\fINumber\fR must be an integer.
\fIWhat\fR must be either \fBunits\fR or \fBpages\fR.
'\" or an abbreviation of one of these, but we don't document that.
If \fIwhat\fR is \fBunits\fR, the view adjusts left or right by
\fInumber\fR average-width characters on the display;  if it is
\fBpages\fR then the view adjusts by \fInumber\fR screenfuls.
If \fInumber\fR is negative then characters farther to the left
become visible;  if it is positive then characters farther to the right
become visible.
.RE
.TP
\fIpathName \fByview \fIargs\fR
This command is used to query and change the vertical position of the
content in the widget's window.  It can take any of the following
forms:
.RS
.TP
\fIpathName \fByview\fR
Returns a list containing two elements.
Each element is a real fraction between 0 and 1; together they describe
the vertical span that is visible in the window.
For example, if the first element is .2 and the second element is .6,
20% of the widget's content is off-screen to the top, the middle 40% is visible
in the window, and 40% of the content is off-screen to the bottom.
These are the same values passed to scrollbars via the \fB\-yscrollcommand\fR
option.
.TP
\fIpathName \fByview\fR \fIindex\fR
Adjusts the view in the window so that the content given by \fIindex\fR
is displayed at the top edge of the window.
.TP
\fIpathName \fByview moveto\fI fraction\fR
Adjusts the view in the window so that the item \fIfraction\fR of the
way through the content appears at the top edge of the window.
\fIFraction\fR must be a fraction between 0 and 1.
.TP
\fIpathName \fByview scroll \fInumber what\fR
This command shifts the view in the window up or down according to
\fInumber\fR and \fIwhat\fR.
\fINumber\fR must be an integer.
\fIWhat\fR must be either \fBunits\fR or \fBpages\fR.
'\" or an abbreviation of one of these, but we don't document that.
If \fIwhat\fR is \fBunits\fR, the view adjusts up or down by
\fInumber\fR average-width characters on the display;  if it is
\fBpages\fR then the view adjusts by \fInumber\fR screenfuls.
If \fInumber\fR is negative then items farther to the top
become visible;  if it is positive then items farther to the bottom
become visible.
.RE
.SH "WIDGET STATES"
The widget state is a bitmap of independent state flags.
Widget state flags include:
.TP
\fBactive\fR
.
The mouse cursor is over the widget

/*
 * Copyright (c) 2013-14 Mikko Mononen [email protected]
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * The SVG parser is based on Anti-Grain Geometry 2.4 SVG example
 * Copyright (C) 2002-2004 Maxim Shemanarev (McSeem) (http://www.antigrain.com/)
 *
 * Arc calculation code based on canvg (https://code.google.com/p/canvg/)
 *
 * Bounding box calculation based on http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
 *
 */

#ifndef NANOSVG_H
#define NANOSVG_H

#ifdef __cplusplus
extern "C" {
#endif

// NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of cubic bezier shapes.
//
// The library suits well for anything from rendering scalable icons in your editor application to prototyping a game.
//
// NanoSVG supports a wide range of SVG features, but something may be missing, feel free to create a pull request!
//
// The shapes in the SVG images are transformed by the viewBox and converted to specified units.
// That is, you should get the same looking data as your designed in your favorite app.
//
// NanoSVG can return the paths in few different units. For example if you want to render an image, you may choose
// to get the paths in pixels, or if you are feeding the data into a CNC-cutter, you may want to use millimeters.
//
// The units passed to NanoVG should be one of: 'px', 'pt', 'pc' 'mm', 'cm', or 'in'.
// DPI (dots-per-inch) controls how the unit conversion is done.
//
// If you don't know or care about the units stuff, "px" and 96 should get you going.


/* Example Usage:
	// Load
	NSVGImage* image;
	image = nsvgParseFromFile("test.svg", "px", 96);
	printf("size: %f x %f\n", image->width, image->height);
	// Use...
	for (NSVGshape *shape = image->shapes; shape != NULL; shape = shape->next) {
		for (NSVGpath *path = shape->paths; path != NULL; path = path->next) {
			for (int i = 0; i < path->npts-1; i += 3) {
				float* p = &path->pts[i*2];
				drawCubicBez(p[0],p[1], p[2],p[3], p[4],p[5], p[6],p[7]);
			}
		}
	}
	// Delete
	nsvgDelete(image);
*/

#ifndef NANOSVG_SCOPE
#define NANOSVG_SCOPE
#endif

#ifndef NANOSVG_malloc
#define NANOSVG_malloc malloc
#endif

#ifndef NANOSVG_realloc
#define NANOSVG_realloc realloc
#endif

#ifndef NANOSVG_free
#define NANOSVG_free free
#endif

// float emulation for MS VC6++ compiler
#if (_MSC_VER == 1200)
#define tanf(a) (float)tan(a)
#define cosf(a) (float)cos(a)
#define sinf(a) (float)sin(a)
#define sqrtf(a) (float)sqrt(a)
#define fabsf(a) (float)abs(a)
#define acosf(a) (float)acos(a)
#define atan2f(a,b) (float)atan2(a,b)
#define ceilf(a) (float)ceil(a)
#define fmodf(a,b) (float)fmod(a,b)
#define floorf(a) (float)floor(a)
#endif

enum NSVGpaintType {
	NSVG_PAINT_NONE = 0,
	NSVG_PAINT_COLOR = 1,
	NSVG_PAINT_LINEAR_GRADIENT = 2,
	NSVG_PAINT_RADIAL_GRADIENT = 3
};

enum NSVGspreadType {
	NSVG_SPREAD_PAD = 0,
	NSVG_SPREAD_REFLECT = 1,
	NSVG_SPREAD_REPEAT = 2
};

enum NSVGlineJoin {
	NSVG_JOIN_MITER = 0,
	NSVG_JOIN_ROUND = 1,
	NSVG_JOIN_BEVEL = 2
};

enum NSVGlineCap {
	NSVG_CAP_BUTT = 0,
	NSVG_CAP_ROUND = 1,
	NSVG_CAP_SQUARE = 2
};

enum NSVGfillRule {
	NSVG_FILLRULE_NONZERO = 0,
	NSVG_FILLRULE_EVENODD = 1
};

enum NSVGflags {
	NSVG_FLAGS_VISIBLE = 0x01
};

typedef struct NSVGgradientStop {
	unsigned int color;
	float offset;
} NSVGgradientStop;

typedef struct NSVGgradient {
	float xform[6];
	char spread;
	float fx, fy;
	int nstops;
	NSVGgradientStop stops[1];
} NSVGgradient;

typedef struct NSVGpaint {
	char type;
	union {
		unsigned int color;
		NSVGgradient* gradient;
	};
} NSVGpaint;

typedef struct NSVGpath
{
	float* pts;					// Cubic bezier points: x0,y0, [cpx1,cpx1,cpx2,cpy2,x1,y1], ...
	int npts;					// Total number of bezier points.
	char closed;				// Flag indicating if shapes should be treated as closed.
	float bounds[4];			// Tight bounding box of the shape [minx,miny,maxx,maxy].
	struct NSVGpath* next;		// Pointer to next path, or NULL if last element.
} NSVGpath;

typedef struct NSVGshape
{
	char id[64];				// Optional 'id' attr of the shape or its group
	NSVGpaint fill;				// Fill paint
	NSVGpaint stroke;			// Stroke paint
	float opacity;				// Opacity of the shape.
	float strokeWidth;			// Stroke width (scaled).
	float strokeDashOffset;		// Stroke dash offset (scaled).
	float strokeDashArray[8];			// Stroke dash array (scaled).
	char strokeDashCount;				// Number of dash values in dash array.
	char strokeLineJoin;		// Stroke join type.
	char strokeLineCap;			// Stroke cap type.
	float miterLimit;			// Miter limit
	char fillRule;				// Fill rule, see NSVGfillRule.
	unsigned char flags;		// Logical or of NSVG_FLAGS_* flags
	float bounds[4];			// Tight bounding box of the shape [minx,miny,maxx,maxy].
	NSVGpath* paths;			// Linked list of paths in the image.
	struct NSVGshape* next;		// Pointer to next shape, or NULL if last element.
} NSVGshape;

typedef struct NSVGimage
{
	float width;				// Width of the image.
	float height;				// Height of the image.
	NSVGshape* shapes;			// Linked list of shapes in the image.
} NSVGimage;

// Parses SVG file from a file, returns SVG image as paths.
NANOSVG_SCOPE NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi);

// Parses SVG file from a null terminated string, returns SVG image as paths.
// Important note: changes the string.
NANOSVG_SCOPE NSVGimage* nsvgParse(char* input, const char* units, float dpi);

// Deletes list of paths.
NANOSVG_SCOPE void nsvgDelete(NSVGimage* image);

#ifdef __cplusplus
}
#endif

#endif // NANOSVG_H

#ifdef NANOSVG_IMPLEMENTATION

#include <string.h>
#include <stdlib.h>
#include <math.h>

#define NSVG_PI (3.14159265358979323846264338327f)
#define NSVG_KAPPA90 (0.5522847493f)	// Length proportional to radius of a cubic bezier handle for 90deg arcs.

#define NSVG_ALIGN_MIN 0
#define NSVG_ALIGN_MID 1
#define NSVG_ALIGN_MAX 2
#define NSVG_ALIGN_NONE 0
#define NSVG_ALIGN_MEET 1
#define NSVG_ALIGN_SLICE 2

#define NSVG_NOTUSED(v) do { (void)(1 ? (void)0 : ( (void)(v) ) ); } while(0)
#define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16))

#ifdef _MSC_VER
	#pragma warning (disable: 4996) // Switch off security warnings
	#pragma warning (disable: 4100) // Switch off unreferenced formal parameter warnings
	#ifdef __cplusplus
	#define NSVG_INLINE inline
	#else
	#define NSVG_INLINE
	#endif
	#if !defined(strtoll)           // old MSVC versions do not have strtoll()
		#define strtoll _strtoi64
	#endif
#else
	#define NSVG_INLINE inline
#endif


static int nsvg__isspace(char c)
{
	return strchr(" \t\n\v\f\r", c) != 0;
}

static int nsvg__isdigit(char c)
{
	return c >= '0' && c <= '9';
}

static int nsvg__isnum(char c)
{
	return strchr("0123456789+-.eE", c) != 0;
}

static NSVG_INLINE float nsvg__minf(float a, float b) { return a < b ? a : b; }
static NSVG_INLINE float nsvg__maxf(float a, float b) { return a > b ? a : b; }


// Simple XML parser

#define NSVG_XML_TAG 1
#define NSVG_XML_CONTENT 2
#define NSVG_XML_MAX_ATTRIBS 256

static void nsvg__parseContent(char* s,
							   void (*contentCb)(void* ud, const char* s),
							   void* ud)
{
	// Trim start white spaces
	while (*s && nsvg__isspace(*s)) s++;
	if (!*s) return;

	if (contentCb)
		(*contentCb)(ud, s);
}

static void nsvg__parseElement(char* s,
							   void (*startelCb)(void* ud, const char* el, const char** attr),
							   void (*endelCb)(void* ud, const char* el),
							   void* ud)
{
	const char* attr[NSVG_XML_MAX_ATTRIBS];
	int nattr = 0;
	char* name;
	int start = 0;
	int end = 0;
	char quote;

	// Skip white space after the '<'
	while (*s && nsvg__isspace(*s)) s++;

	// Check if the tag is end tag
	if (*s == '/') {
		s++;
		end = 1;
	} else {
		start = 1;
	}

	// Skip comments, data and preprocessor stuff.
	if (!*s || *s == '?' || *s == '!')
		return;

	// Get tag name
	name = s;
	while (*s && !nsvg__isspace(*s)) s++;
	if (*s) { *s++ = '\0'; }

	// Get attribs
	while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS-3) {
		char* name = NULL;
		char* value = NULL;

		// Skip white space before the attrib name
		while (*s && nsvg__isspace(*s)) s++;
		if (!*s) break;
		if (*s == '/') {
			end = 1;
			break;
		}
		name = s;
		// Find end of the attrib name.
		while (*s && !nsvg__isspace(*s) && *s != '=') s++;
		if (*s) { *s++ = '\0'; }
		// Skip until the beginning of the value.
		while (*s && *s != '\"' && *s != '\'') s++;
		if (!*s) break;
		quote = *s;
		s++;
		// Store value and find the end of it.
		value = s;
		while (*s && *s != quote) s++;
		if (*s) { *s++ = '\0'; }

		// Store only well formed attributes
		if (name && value) {
			attr[nattr++] = name;
			attr[nattr++] = value;
		}
	}

	// List terminator
	attr[nattr++] = 0;
	attr[nattr++] = 0;

	// Call callbacks.
	if (start && startelCb)
		(*startelCb)(ud, name, attr);
	if (end && endelCb)
		(*endelCb)(ud, name);
}

NANOSVG_SCOPE
int nsvg__parseXML(char* input,
				   void (*startelCb)(void* ud, const char* el, const char** attr),
				   void (*endelCb)(void* ud, const char* el),
				   void (*contentCb)(void* ud, const char* s),
				   void* ud)
{
	char* s = input;
	char* mark = s;
	int state = NSVG_XML_CONTENT;
	while (*s) {
		if (*s == '<' && state == NSVG_XML_CONTENT) {
			// Start of a tag
			*s++ = '\0';
			nsvg__parseContent(mark, contentCb, ud);
			mark = s;
			state = NSVG_XML_TAG;
		} else if (*s == '>' && state == NSVG_XML_TAG) {
			// Start of a content or new tag.
			*s++ = '\0';
			nsvg__parseContent(mark, contentCb, ud);
			nsvg__parseElement(mark, startelCb, endelCb, ud);
			mark = s;
			state = NSVG_XML_CONTENT;
		} else {
			s++;
		}
	}

	return 1;
}


/* Simple SVG parser. */

#define NSVG_MAX_ATTR 128

enum NSVGgradientUnits {
	NSVG_USER_SPACE = 0,
	NSVG_OBJECT_SPACE = 1
};

#define NSVG_MAX_DASHES 8

enum NSVGunits {
	NSVG_UNITS_USER,
	NSVG_UNITS_PX,
	NSVG_UNITS_PT,
	NSVG_UNITS_PC,
	NSVG_UNITS_MM,
	NSVG_UNITS_CM,
	NSVG_UNITS_IN,
	NSVG_UNITS_PERCENT,
	NSVG_UNITS_EM,
	NSVG_UNITS_EX
};

enum NSVGvisible {
	NSVG_VIS_DISPLAY = 1,
	NSVG_VIS_VISIBLE = 2
};

typedef struct NSVGcoordinate {
	float value;
	int units;
} NSVGcoordinate;

typedef struct NSVGlinearData {
	NSVGcoordinate x1, y1, x2, y2;
} NSVGlinearData;

typedef struct NSVGradialData {
	NSVGcoordinate cx, cy, r, fx, fy;
} NSVGradialData;

typedef struct NSVGgradientData
{
	char id[64];
	char ref[64];
	char type;
	union {
		NSVGlinearData linear;
		NSVGradialData radial;
	};
	char spread;
	char units;
	float xform[6];
	int nstops;
	NSVGgradientStop* stops;
	struct NSVGgradientData* next;
} NSVGgradientData;

typedef struct NSVGattrib
{
	char id[64];
	float xform[6];
	unsigned int fillColor;
	unsigned int strokeColor;
	float opacity;
	float fillOpacity;
	float strokeOpacity;
	char fillGradient[64];
	char strokeGradient[64];
	float strokeWidth;
	float strokeDashOffset;
	float strokeDashArray[NSVG_MAX_DASHES];
	int strokeDashCount;
	char strokeLineJoin;
	char strokeLineCap;
	float miterLimit;
	char fillRule;
	float fontSize;
	unsigned int stopColor;
	float stopOpacity;
	float stopOffset;
	char hasFill;
	char hasStroke;
	char visible;
} NSVGattrib;

typedef struct NSVGstyles
{
	char*	name;
	char* description;
	struct NSVGstyles* next;
} NSVGstyles;

typedef struct NSVGparser
{
	NSVGattrib attr[NSVG_MAX_ATTR];
	int attrHead;
	float* pts;
	int npts;
	int cpts;
	NSVGpath* plist;
	NSVGimage* image;
	NSVGstyles* styles;
	NSVGgradientData* gradients;
	NSVGshape* shapesTail;
	float viewMinx, viewMiny, viewWidth, viewHeight;
	int alignX, alignY, alignType;
	float dpi;
	char pathFlag;
	char defsFlag;
	char styleFlag;
} NSVGparser;

static void nsvg__xformIdentity(float* t)
{
	t[0] = 1.0f; t[1] = 0.0f;
	t[2] = 0.0f; t[3] = 1.0f;
	t[4] = 0.0f; t[5] = 0.0f;
}

static void nsvg__xformSetTranslation(float* t, float tx, float ty)
{
	t[0] = 1.0f; t[1] = 0.0f;
	t[2] = 0.0f; t[3] = 1.0f;
	t[4] = tx; t[5] = ty;
}

static void nsvg__xformSetScale(float* t, float sx, float sy)
{
	t[0] = sx; t[1] = 0.0f;
	t[2] = 0.0f; t[3] = sy;
	t[4] = 0.0f; t[5] = 0.0f;
}

static void nsvg__xformSetSkewX(float* t, float a)
{
	t[0] = 1.0f; t[1] = 0.0f;
	t[2] = tanf(a); t[3] = 1.0f;
	t[4] = 0.0f; t[5] = 0.0f;
}

static void nsvg__xformSetSkewY(float* t, float a)
{
	t[0] = 1.0f; t[1] = tanf(a);
	t[2] = 0.0f; t[3] = 1.0f;
	t[4] = 0.0f; t[5] = 0.0f;
}

static void nsvg__xformSetRotation(float* t, float a)
{
	float cs = cosf(a), sn = sinf(a);
	t[0] = cs; t[1] = sn;
	t[2] = -sn; t[3] = cs;
	t[4] = 0.0f; t[5] = 0.0f;
}

static void nsvg__xformMultiply(float* t, float* s)
{
	float t0 = t[0] * s[0] + t[1] * s[2];
	float t2 = t[2] * s[0] + t[3] * s[2];
	float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
	t[1] = t[0] * s[1] + t[1] * s[3];
	t[3] = t[2] * s[1] + t[3] * s[3];
	t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
	t[0] = t0;
	t[2] = t2;
	t[4] = t4;
}

static void nsvg__xformInverse(float* inv, float* t)
{
	double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
	if (det > -1e-6 && det < 1e-6) {
		nsvg__xformIdentity(t);
		return;
	}
	invdet = 1.0 / det;
	inv[0] = (float)(t[3] * invdet);
	inv[2] = (float)(-t[2] * invdet);
	inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
	inv[1] = (float)(-t[1] * invdet);
	inv[3] = (float)(t[0] * invdet);
	inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
}

static void nsvg__xformPremultiply(float* t, float* s)
{
	float s2[6];
	memcpy(s2, s, sizeof(float)*6);
	nsvg__xformMultiply(s2, t);
	memcpy(t, s2, sizeof(float)*6);
}

static void nsvg__xformPoint(float* dx, float* dy, float x, float y, float* t)
{
	*dx = x*t[0] + y*t[2] + t[4];
	*dy = x*t[1] + y*t[3] + t[5];
}

static void nsvg__xformVec(float* dx, float* dy, float x, float y, float* t)
{
	*dx = x*t[0] + y*t[2];
	*dy = x*t[1] + y*t[3];
}

#define NSVG_EPSILON (1e-12)

static int nsvg__ptInBounds(float* pt, float* bounds)
{
	return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
}


static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3)
{
	double it = 1.0-t;
	return it*it*it*p0 + 3.0*it*it*t*p1 + 3.0*it*t*t*p2 + t*t*t*p3;
}

static void nsvg__curveBounds(float* bounds, float* curve)
{
	int i, j, count;
	double roots[2], a, b, c, b2ac, t, v;
	float* v0 = &curve[0];
	float* v1 = &curve[2];
	float* v2 = &curve[4];
	float* v3 = &curve[6];

	// Start the bounding box by end points
	bounds[0] = nsvg__minf(v0[0], v3[0]);
	bounds[1] = nsvg__minf(v0[1], v3[1]);
	bounds[2] = nsvg__maxf(v0[0], v3[0]);
	bounds[3] = nsvg__maxf(v0[1], v3[1]);

	// Bezier curve fits inside the convex hull of it's control points.
	// If control points are inside the bounds, we're done.
	if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
		return;

	// Add bezier curve inflection points in X and Y.
	for (i = 0; i < 2; i++) {
		a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
		b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
		c = 3.0 * v1[i] - 3.0 * v0[i];
		count = 0;
		if (fabs(a) < NSVG_EPSILON) {
			if (fabs(b) > NSVG_EPSILON) {
				t = -c / b;
				if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
					roots[count++] = t;
			}
		} else {
			b2ac = b*b - 4.0*c*a;
			if (b2ac > NSVG_EPSILON) {
				t = (-b + sqrt(b2ac)) / (2.0 * a);
				if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
					roots[count++] = t;
				t = (-b - sqrt(b2ac)) / (2.0 * a);
				if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
					roots[count++] = t;
			}
		}
		for (j = 0; j < count; j++) {
			v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
			bounds[0+i] = nsvg__minf(bounds[0+i], (float)v);
			bounds[2+i] = nsvg__maxf(bounds[2+i], (float)v);
		}
	}
}

static NSVGparser* nsvg__createParser()
{
	NSVGparser* p;
	p = (NSVGparser*)NANOSVG_malloc(sizeof(NSVGparser));
	if (p == NULL) goto error;
	memset(p, 0, sizeof(NSVGparser));

	p->image = (NSVGimage*)NANOSVG_malloc(sizeof(NSVGimage));
	if (p->image == NULL) goto error;
	memset(p->image, 0, sizeof(NSVGimage));

	// Init style
	nsvg__xformIdentity(p->attr[0].xform);
	memset(p->attr[0].id, 0, sizeof p->attr[0].id);
	p->attr[0].fillColor = NSVG_RGB(0,0,0);
	p->attr[0].strokeColor = NSVG_RGB(0,0,0);
	p->attr[0].opacity = 1;
	p->attr[0].fillOpacity = 1;
	p->attr[0].strokeOpacity = 1;
	p->attr[0].stopOpacity = 1;
	p->attr[0].strokeWidth = 1;
	p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
	p->attr[0].strokeLineCap = NSVG_CAP_BUTT;
	p->attr[0].miterLimit = 4;
	p->attr[0].fillRule = NSVG_FILLRULE_NONZERO;
	p->attr[0].hasFill = 1;
	p->attr[0].visible = NSVG_VIS_DISPLAY | NSVG_VIS_VISIBLE;

	return p;

error:
	if (p) {
		if (p->image) NANOSVG_free(p->image);
		NANOSVG_free(p);
	}
	return NULL;
}

static void nsvg__deleteStyles(NSVGstyles* style) {
	while (style) {
		NSVGstyles *next = style->next;
		if (style->name!= NULL)
			free(style->name);
		if (style->description != NULL)
			free(style->description);
		free(style);
		style = next;
	}
}

static void nsvg__deletePaths(NSVGpath* path)
{
	while (path) {
		NSVGpath *next = path->next;
		if (path->pts != NULL)
			NANOSVG_free(path->pts);
		NANOSVG_free(path);
		path = next;
	}
}

static void nsvg__deletePaint(NSVGpaint* paint)
{
	if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
		NANOSVG_free(paint->gradient);
}

static void nsvg__deleteGradientData(NSVGgradientData* grad)
{
	NSVGgradientData* next;
	while (grad != NULL) {
		next = grad->next;
		NANOSVG_free(grad->stops);
		NANOSVG_free(grad);
		grad = next;
	}
}

static void nsvg__deleteParser(NSVGparser* p)
{
	if (p != NULL) {
		nsvg__deleteStyles(p->styles);
		nsvg__deletePaths(p->plist);
		nsvg__deleteGradientData(p->gradients);
		nsvgDelete(p->image);
		NANOSVG_free(p->pts);
		NANOSVG_free(p);
	}
}

static void nsvg__resetPath(NSVGparser* p)
{
	p->npts = 0;
}

static void nsvg__addPoint(NSVGparser* p, float x, float y)
{
	if (p->npts+1 > p->cpts) {
		p->cpts = p->cpts ? p->cpts*2 : 8;
		p->pts = (float*)NANOSVG_realloc(p->pts, p->cpts*2*sizeof(float));
		if (!p->pts) return;
	}
	p->pts[p->npts*2+0] = x;
	p->pts[p->npts*2+1] = y;
	p->npts++;
}

static void nsvg__moveTo(NSVGparser* p, float x, float y)
{
	if (p->npts > 0) {
		p->pts[(p->npts-1)*2+0] = x;
		p->pts[(p->npts-1)*2+1] = y;
	} else {
		nsvg__addPoint(p, x, y);
	}
}

static void nsvg__lineTo(NSVGparser* p, float x, float y)
{
	float px,py, dx,dy;
	if (p->npts > 0) {
		px = p->pts[(p->npts-1)*2+0];
		py = p->pts[(p->npts-1)*2+1];
		dx = x - px;
		dy = y - py;
		nsvg__addPoint(p, px + dx/3.0f, py + dy/3.0f);
		nsvg__addPoint(p, x - dx/3.0f, y - dy/3.0f);
		nsvg__addPoint(p, x, y);
	}
}

static void nsvg__cubicBezTo(NSVGparser* p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y)
{
	nsvg__addPoint(p, cpx1, cpy1);
	nsvg__addPoint(p, cpx2, cpy2);
	nsvg__addPoint(p, x, y);
}

static NSVGattrib* nsvg__getAttr(NSVGparser* p)
{
	return &p->attr[p->attrHead];
}

static void nsvg__pushAttr(NSVGparser* p)
{
	if (p->attrHead < NSVG_MAX_ATTR-1) {
		p->attrHead++;
		memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead-1], sizeof(NSVGattrib));
	}
}

static void nsvg__popAttr(NSVGparser* p)
{
	if (p->attrHead > 0)
		p->attrHead--;
}

static float nsvg__actualOrigX(NSVGparser* p)
{
	return p->viewMinx;
}

static float nsvg__actualOrigY(NSVGparser* p)
{
	return p->viewMiny;
}

static float nsvg__actualWidth(NSVGparser* p)
{
	return p->viewWidth;
}

static float nsvg__actualHeight(NSVGparser* p)
{
	return p->viewHeight;
}

static float nsvg__actualLength(NSVGparser* p)
{
	float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
	return sqrtf(w*w + h*h) / sqrtf(2.0f);
}

static float nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, float orig, float length)
{
	NSVGattrib* attr = nsvg__getAttr(p);
	switch (c.units) {
		case NSVG_UNITS_USER:		return c.value;
		case NSVG_UNITS_PX:			return c.value;
		case NSVG_UNITS_PT:			return c.value / 72.0f * p->dpi;
		case NSVG_UNITS_PC:			return c.value / 6.0f * p->dpi;
		case NSVG_UNITS_MM:			return c.value / 25.4f * p->dpi;
		case NSVG_UNITS_CM:			return c.value / 2.54f * p->dpi;
		case NSVG_UNITS_IN:			return c.value * p->dpi;
		case NSVG_UNITS_EM:			return c.value * attr->fontSize;
		case NSVG_UNITS_EX:			return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
		case NSVG_UNITS_PERCENT:	return orig + c.value / 100.0f * length;
		default:					return c.value;
	}
	return c.value;
}

static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
{
	NSVGgradientData* grad = p->gradients;
	while (grad) {
		if (strcmp(grad->id, id) == 0)
			return grad;
		grad = grad->next;
	}
	return NULL;
}

static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, char* paintType)
{
	NSVGattrib* attr = nsvg__getAttr(p);
	NSVGgradientData* data = NULL;
	NSVGgradientData* ref = NULL;
	NSVGgradientStop* stops = NULL;
	NSVGgradient* grad;
	float ox, oy, sw, sh, sl;
	int nstops = 0;

	data = nsvg__findGradientData(p, id);
	if (data == NULL) return NULL;

	// TODO: use ref to fill in all unset values too.
	ref = data;
	while (ref != NULL) {
		if (stops == NULL && ref->stops != NULL) {
			stops = ref->stops;
			nstops = ref->nstops;
			break;
		}
		ref = nsvg__findGradientData(p, ref->ref);
	}
	if (stops == NULL) return NULL;

	grad = (NSVGgradient*)NANOSVG_malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1));
	if (grad == NULL) return NULL;

	// The shape width and height.
	if (data->units == NSVG_OBJECT_SPACE) {
		ox = localBounds[0];
		oy = localBounds[1];
		sw = localBounds[2] - localBounds[0];
		sh = localBounds[3] - localBounds[1];
	} else {
		ox = nsvg__actualOrigX(p);
		oy = nsvg__actualOrigY(p);
		sw = nsvg__actualWidth(p);
		sh = nsvg__actualHeight(p);
	}
	sl = sqrtf(sw*sw + sh*sh) / sqrtf(2.0f);

	if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
		float x1, y1, x2, y2, dx, dy;
		x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
		y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
		x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
		y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh);
		// Calculate transform aligned to the line
		dx = x2 - x1;
		dy = y2 - y1;
		grad->xform[0] = dy; grad->xform[1] = -dx;
		grad->xform[2] = dx; grad->xform[3] = dy;
		grad->xform[4] = x1; grad->xform[5] = y1;
	} else {
		float cx, cy, fx, fy, r;
		cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
		cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
		fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
		fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
		r = nsvg__convertToPixels(p, data->radial.r, 0, sl);
		// Calculate transform aligned to the circle
		grad->xform[0] = r; grad->xform[1] = 0;
		grad->xform[2] = 0; grad->xform[3] = r;
		grad->xform[4] = cx; grad->xform[5] = cy;
		grad->fx = fx / r;
		grad->fy = fy / r;
	}

	nsvg__xformMultiply(grad->xform, data->xform);
	nsvg__xformMultiply(grad->xform, attr->xform);

	grad->spread = data->spread;
	memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
	grad->nstops = nstops;

	*paintType = data->type;

	return grad;
}

static float nsvg__getAverageScale(float* t)
{
	float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
	float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
	return (sx + sy) * 0.5f;
}

static void nsvg__getLocalBounds(float* bounds, NSVGshape *shape, float* xform)
{
	NSVGpath* path;
	float curve[4*2], curveBounds[4];
	int i, first = 1;
	for (path = shape->paths; path != NULL; path = path->next) {
		nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
		for (i = 0; i < path->npts-1; i += 3) {
			nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i+1)*2], path->pts[(i+1)*2+1], xform);
			nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i+2)*2], path->pts[(i+2)*2+1], xform);
			nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i+3)*2], path->pts[(i+3)*2+1], xform);
			nsvg__curveBounds(curveBounds, curve);
			if (first) {
				bounds[0] = curveBounds[0];
				bounds[1] = curveBounds[1];
				bounds[2] = curveBounds[2];
				bounds[3] = curveBounds[3];
				first = 0;
			} else {
				bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
				bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
				bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
				bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
			}
			curve[0] = curve[6];
			curve[1] = curve[7];
		}
	}
}

static void nsvg__addShape(NSVGparser* p)
{
	NSVGattrib* attr = nsvg__getAttr(p);
	float scale = 1.0f;
	NSVGshape* shape;
	NSVGpath* path;
	int i;

	if (p->plist == NULL)
		return;

	shape = (NSVGshape*)NANOSVG_malloc(sizeof(NSVGshape));
	if (shape == NULL) goto error;
	memset(shape, 0, sizeof(NSVGshape));

	memcpy(shape->id, attr->id, sizeof shape->id);
	scale = nsvg__getAverageScale(attr->xform);
	shape->strokeWidth = attr->strokeWidth * scale;
	shape->strokeDashOffset = attr->strokeDashOffset * scale;
	shape->strokeDashCount = (char)attr->strokeDashCount;
	for (i = 0; i < attr->strokeDashCount; i++)
		shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
	shape->strokeLineJoin = attr->strokeLineJoin;
	shape->strokeLineCap = attr->strokeLineCap;
	shape->miterLimit = attr->miterLimit;
	shape->fillRule = attr->fillRule;
	shape->opacity = attr->opacity;

	shape->paths = p->plist;
	p->plist = NULL;

	// Calculate shape bounds
	shape->bounds[0] = shape->paths->bounds[0];
	shape->bounds[1] = shape->paths->bounds[1];
	shape->bounds[2] = shape->paths->bounds[2];
	shape->bounds[3] = shape->paths->bounds[3];
	for (path = shape->paths->next; path != NULL; path = path->next) {
		shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
		shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
		shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
		shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
	}

	// Set fill
	if (attr->hasFill == 0) {
		shape->fill.type = NSVG_PAINT_NONE;
	} else if (attr->hasFill == 1) {
		shape->fill.type = NSVG_PAINT_COLOR;
		shape->fill.color = attr->fillColor;
		shape->fill.color |= (unsigned int)(attr->fillOpacity*255) << 24;
	} else if (attr->hasFill == 2) {
		float inv[6], localBounds[4];
		nsvg__xformInverse(inv, attr->xform);
		nsvg__getLocalBounds(localBounds, shape, inv);
		shape->fill.gradient = nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type);
		if (shape->fill.gradient == NULL) {
			shape->fill.type = NSVG_PAINT_NONE;
		}
	}

	// Set stroke
	if (attr->hasStroke == 0) {
		shape->stroke.type = NSVG_PAINT_NONE;
	} else if (attr->hasStroke == 1) {
		shape->stroke.type = NSVG_PAINT_COLOR;
		shape->stroke.color = attr->strokeColor;
		shape->stroke.color |= (unsigned int)(attr->strokeOpacity*255) << 24;
	} else if (attr->hasStroke == 2) {
		float inv[6], localBounds[4];
		nsvg__xformInverse(inv, attr->xform);
		nsvg__getLocalBounds(localBounds, shape, inv);
		shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, &shape->stroke.type);
		if (shape->stroke.gradient == NULL)
			shape->stroke.type = NSVG_PAINT_NONE;
	}

	// Set flags
	shape->flags = ((attr->visible & NSVG_VIS_DISPLAY) && (attr->visible & NSVG_VIS_VISIBLE) ? NSVG_FLAGS_VISIBLE : 0x00);

	// Add to tail
	if (p->image->shapes == NULL)
		p->image->shapes = shape;
	else
		p->shapesTail->next = shape;
	p->shapesTail = shape;

	return;

error:
	if (shape) NANOSVG_free(shape);
}

static void nsvg__addPath(NSVGparser* p, char closed)
{
	NSVGattrib* attr = nsvg__getAttr(p);
	NSVGpath* path = NULL;
	float bounds[4];
	float* curve;
	int i;

	if (p->npts < 4)
		return;

	if (closed)
		nsvg__lineTo(p, p->pts[0], p->pts[1]);

	path = (NSVGpath*)NANOSVG_malloc(sizeof(NSVGpath));
	if (path == NULL) goto error;
	memset(path, 0, sizeof(NSVGpath));

	path->pts = (float*)NANOSVG_malloc(p->npts*2*sizeof(float));
	if (path->pts == NULL) goto error;
	path->closed = closed;
	path->npts = p->npts;

	// Transform path.
	for (i = 0; i < p->npts; ++i)
		nsvg__xformPoint(&path->pts[i*2], &path->pts[i*2+1], p->pts[i*2], p->pts[i*2+1], attr->xform);

	// Find bounds
	for (i = 0; i < path->npts-1; i += 3) {
		curve = &path->pts[i*2];
		nsvg__curveBounds(bounds, curve);
		if (i == 0) {
			path->bounds[0] = bounds[0];
			path->bounds[1] = bounds[1];
			path->bounds[2] = bounds[2];
			path->bounds[3] = bounds[3];
		} else {
			path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
			path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
			path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
			path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
		}
	}

	path->next = p->plist;
	p->plist = path;

	return;

error:
	if (path != NULL) {
		if (path->pts != NULL) NANOSVG_free(path->pts);
		NANOSVG_free(path);
	}
}

// We roll our own string to float because the std library one uses locale and messes things up.
static double nsvg__atof(const char* s)
{
	char* cur = (char*)s;
	char* end = NULL;
	double res = 0.0, sign = 1.0;
#if (_MSC_VER == 1200)
	__int64 intPart = 0, fracPart = 0;
#else
	long long intPart = 0, fracPart = 0;
#endif
	char hasIntPart = 0, hasFracPart = 0;

	// Parse optional sign
	if (*cur == '+') {
		cur++;
	} else if (*cur == '-') {
		sign = -1;
		cur++;
	}

	// Parse integer part
	if (nsvg__isdigit(*cur)) {
		// Parse digit sequence
#if (_MSC_VER == 1200)
		intPart = strtol(cur, &end, 10);
#else
		intPart = strtoll(cur, &end, 10);
#endif
		if (cur != end) {
			res = (double)intPart;
			hasIntPart = 1;
			cur = end;
		}
	}

	// Parse fractional part.
	if (*cur == '.') {
		cur++; // Skip '.'
		if (nsvg__isdigit(*cur)) {
			// Parse digit sequence
#if (_MSC_VER == 1200)
			fracPart = strtol(cur, &end, 10);
#else
			fracPart = strtoll(cur, &end, 10);
#endif
			if (cur != end) {
				res += (double)fracPart / pow(10.0, (double)(end - cur));
				hasFracPart = 1;
				cur = end;
			}
		}
	}

	// A valid number should have integer or fractional part.
	if (!hasIntPart && !hasFracPart)
		return 0.0;

	// Parse optional exponent
	if (*cur == 'e' || *cur == 'E') {
		int expPart = 0;
		cur++; // skip 'E'
		expPart = strtol(cur, &end, 10); // Parse digit sequence with sign
		if (cur != end) {
			res *= pow(10.0, (double)expPart);
		}
	}

	return res * sign;
}


static const char* nsvg__parseNumber(const char* s, char* it, const int size)
{
	const int last = size-1;
	int i = 0;

	// sign
	if (*s == '-' || *s == '+') {
		if (i < last) it[i++] = *s;
		s++;
	}
	// integer part
	while (*s && nsvg__isdigit(*s)) {
		if (i < last) it[i++] = *s;
		s++;
	}
	if (*s == '.') {
		// decimal point
		if (i < last) it[i++] = *s;
		s++;
		// fraction part
		while (*s && nsvg__isdigit(*s)) {
			if (i < last) it[i++] = *s;
			s++;
		}
	}
	// exponent
	if (*s == 'e' || *s == 'E') {
		if (i < last) it[i++] = *s;
		s++;
		if (*s == '-' || *s == '+') {
			if (i < last) it[i++] = *s;
			s++;
		}
		while (*s && nsvg__isdigit(*s)) {
			if (i < last) it[i++] = *s;
			s++;
		}
	}
	it[i] = '\0';

	return s;
}

static const char* nsvg__getNextPathItem(const char* s, char* it)
{
	it[0] = '\0';
	// Skip white spaces and commas
	while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
	if (!*s) return s;
	if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
		s = nsvg__parseNumber(s, it, 64);
	} else {
		// Parse command
		it[0] = *s++;
		it[1] = '\0';
		return s;
	}

	return s;
}

static unsigned int nsvg__parseColorHex(const char* str)
{
	unsigned int c = 0, r = 0, g = 0, b = 0;
	int n = 0;
	str++; // skip #
	// Calculate number of characters.
	while(str[n] && !nsvg__isspace(str[n]))
		n++;
	if (n == 6) {
		sscanf(str, "%x", &c);
	} else if (n == 3) {
		sscanf(str, "%x", &c);
		c = (c&0xf) | ((c&0xf0) << 4) | ((c&0xf00) << 8);
		c |= c<<4;
	}
	r = (c >> 16) & 0xff;
	g = (c >> 8) & 0xff;
	b = c & 0xff;
	return NSVG_RGB(r,g,b);
}

static unsigned int nsvg__parseColorRGB(const char* str)
{
	int r = -1, g = -1, b = -1;
	char s1[32]="", s2[32]="";
	sscanf(str + 4, "%d%[%%, \t]%d%[%%, \t]%d", &r, s1, &g, s2, &b);
	if (strchr(s1, '%')) {
		return NSVG_RGB((r*255)/100,(g*255)/100,(b*255)/100);
	} else {
		return NSVG_RGB(r,g,b);
	}
}

typedef struct NSVGNamedColor {
	const char* name;
	unsigned int color;
} NSVGNamedColor;

NSVGNamedColor nsvg__colors[] = {

	{ "red", NSVG_RGB(255, 0, 0) },
	{ "green", NSVG_RGB( 0, 128, 0) },
	{ "blue", NSVG_RGB( 0, 0, 255) },
	{ "yellow", NSVG_RGB(255, 255, 0) },
	{ "cyan", NSVG_RGB( 0, 255, 255) },
	{ "magenta", NSVG_RGB(255, 0, 255) },
	{ "black", NSVG_RGB( 0, 0, 0) },
	{ "grey", NSVG_RGB(128, 128, 128) },
	{ "gray", NSVG_RGB(128, 128, 128) },
	{ "white", NSVG_RGB(255, 255, 255) },

#ifdef NANOSVG_ALL_COLOR_KEYWORDS
	{ "aliceblue", NSVG_RGB(240, 248, 255) },
	{ "antiquewhite", NSVG_RGB(250, 235, 215) },
	{ "aqua", NSVG_RGB( 0, 255, 255) },
	{ "aquamarine", NSVG_RGB(127, 255, 212) },
	{ "azure", NSVG_RGB(240, 255, 255) },
	{ "beige", NSVG_RGB(245, 245, 220) },
	{ "bisque", NSVG_RGB(255, 228, 196) },
	{ "blanchedalmond", NSVG_RGB(255, 235, 205) },
	{ "blueviolet", NSVG_RGB(138, 43, 226) },
	{ "brown", NSVG_RGB(165, 42, 42) },
	{ "burlywood", NSVG_RGB(222, 184, 135) },
	{ "cadetblue", NSVG_RGB( 95, 158, 160) },
	{ "chartreuse", NSVG_RGB(127, 255, 0) },
	{ "chocolate", NSVG_RGB(210, 105, 30) },
	{ "coral", NSVG_RGB(255, 127, 80) },
	{ "cornflowerblue", NSVG_RGB(100, 149, 237) },
	{ "cornsilk", NSVG_RGB(255, 248, 220) },
	{ "crimson", NSVG_RGB(220, 20, 60) },
	{ "darkblue", NSVG_RGB( 0, 0, 139) },
	{ "darkcyan", NSVG_RGB( 0, 139, 139) },
	{ "darkgoldenrod", NSVG_RGB(184, 134, 11) },
	{ "darkgray", NSVG_RGB(169, 169, 169) },
	{ "darkgreen", NSVG_RGB( 0, 100, 0) },
	{ "darkgrey", NSVG_RGB(169, 169, 169) },
	{ "darkkhaki", NSVG_RGB(189, 183, 107) },
	{ "darkmagenta", NSVG_RGB(139, 0, 139) },
	{ "darkolivegreen", NSVG_RGB( 85, 107, 47) },
	{ "darkorange", NSVG_RGB(255, 140, 0) },
	{ "darkorchid", NSVG_RGB(153, 50, 204) },
	{ "darkred", NSVG_RGB(139, 0, 0) },
	{ "darksalmon", NSVG_RGB(233, 150, 122) },
	{ "darkseagreen", NSVG_RGB(143, 188, 143) },
	{ "darkslateblue", NSVG_RGB( 72, 61, 139) },
	{ "darkslategray", NSVG_RGB( 47, 79, 79) },
	{ "darkslategrey", NSVG_RGB( 47, 79, 79) },
	{ "darkturquoise", NSVG_RGB( 0, 206, 209) },
	{ "darkviolet", NSVG_RGB(148, 0, 211) },
	{ "deeppink", NSVG_RGB(255, 20, 147) },
	{ "deepskyblue", NSVG_RGB( 0, 191, 255) },
	{ "dimgray", NSVG_RGB(105, 105, 105) },
	{ "dimgrey", NSVG_RGB(105, 105, 105) },
	{ "dodgerblue", NSVG_RGB( 30, 144, 255) },
	{ "firebrick", NSVG_RGB(178, 34, 34) },
	{ "floralwhite", NSVG_RGB(255, 250, 240) },
	{ "forestgreen", NSVG_RGB( 34, 139, 34) },
	{ "fuchsia", NSVG_RGB(255, 0, 255) },
	{ "gainsboro", NSVG_RGB(220, 220, 220) },
	{ "ghostwhite", NSVG_RGB(248, 248, 255) },
	{ "gold", NSVG_RGB(255, 215, 0) },
	{ "goldenrod", NSVG_RGB(218, 165, 32) },
	{ "greenyellow", NSVG_RGB(173, 255, 47) },
	{ "honeydew", NSVG_RGB(240, 255, 240) },
	{ "hotpink", NSVG_RGB(255, 105, 180) },
	{ "indianred", NSVG_RGB(205, 92, 92) },
	{ "indigo", NSVG_RGB( 75, 0, 130) },
	{ "ivory", NSVG_RGB(255, 255, 240) },
	{ "khaki", NSVG_RGB(240, 230, 140) },
	{ "lavender", NSVG_RGB(230, 230, 250) },
	{ "lavenderblush", NSVG_RGB(255, 240, 245) },
	{ "lawngreen", NSVG_RGB(124, 252, 0) },
	{ "lemonchiffon", NSVG_RGB(255, 250, 205) },
	{ "lightblue", NSVG_RGB(173, 216, 230) },
	{ "lightcoral", NSVG_RGB(240, 128, 128) },
	{ "lightcyan", NSVG_RGB(224, 255, 255) },
	{ "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) },
	{ "lightgray", NSVG_RGB(211, 211, 211) },
	{ "lightgreen", NSVG_RGB(144, 238, 144) },
	{ "lightgrey", NSVG_RGB(211, 211, 211) },
	{ "lightpink", NSVG_RGB(255, 182, 193) },
	{ "lightsalmon", NSVG_RGB(255, 160, 122) },
	{ "lightseagreen", NSVG_RGB( 32, 178, 170) },
	{ "lightskyblue", NSVG_RGB(135, 206, 250) },
	{ "lightslategray", NSVG_RGB(119, 136, 153) },
	{ "lightslategrey", NSVG_RGB(119, 136, 153) },
	{ "lightsteelblue", NSVG_RGB(176, 196, 222) },
	{ "lightyellow", NSVG_RGB(255, 255, 224) },
	{ "lime", NSVG_RGB( 0, 255, 0) },
	{ "limegreen", NSVG_RGB( 50, 205, 50) },
	{ "linen", NSVG_RGB(250, 240, 230) },
	{ "maroon", NSVG_RGB(128, 0, 0) },
	{ "mediumaquamarine", NSVG_RGB(102, 205, 170) },
	{ "mediumblue", NSVG_RGB( 0, 0, 205) },
	{ "mediumorchid", NSVG_RGB(186, 85, 211) },
	{ "mediumpurple", NSVG_RGB(147, 112, 219) },
	{ "mediumseagreen", NSVG_RGB( 60, 179, 113) },
	{ "mediumslateblue", NSVG_RGB(123, 104, 238) },
	{ "mediumspringgreen", NSVG_RGB( 0, 250, 154) },
	{ "mediumturquoise", NSVG_RGB( 72, 209, 204) },
	{ "mediumvioletred", NSVG_RGB(199, 21, 133) },
	{ "midnightblue", NSVG_RGB( 25, 25, 112) },
	{ "mintcream", NSVG_RGB(245, 255, 250) },
	{ "mistyrose", NSVG_RGB(255, 228, 225) },
	{ "moccasin", NSVG_RGB(255, 228, 181) },
	{ "navajowhite", NSVG_RGB(255, 222, 173) },
	{ "navy", NSVG_RGB( 0, 0, 128) },
	{ "oldlace", NSVG_RGB(253, 245, 230) },
	{ "olive", NSVG_RGB(128, 128, 0) },
	{ "olivedrab", NSVG_RGB(107, 142, 35) },
	{ "orange", NSVG_RGB(255, 165, 0) },
	{ "orangered", NSVG_RGB(255, 69, 0) },
	{ "orchid", NSVG_RGB(218, 112, 214) },
	{ "palegoldenrod", NSVG_RGB(238, 232, 170) },
	{ "palegreen", NSVG_RGB(152, 251, 152) },
	{ "paleturquoise", NSVG_RGB(175, 238, 238) },
	{ "palevioletred", NSVG_RGB(219, 112, 147) },
	{ "papayawhip", NSVG_RGB(255, 239, 213) },
	{ "peachpuff", NSVG_RGB(255, 218, 185) },
	{ "peru", NSVG_RGB(205, 133, 63) },
	{ "pink", NSVG_RGB(255, 192, 203) },
	{ "plum", NSVG_RGB(221, 160, 221) },
	{ "powderblue", NSVG_RGB(176, 224, 230) },
	{ "purple", NSVG_RGB(128, 0, 128) },
	{ "rosybrown", NSVG_RGB(188, 143, 143) },
	{ "royalblue", NSVG_RGB( 65, 105, 225) },
	{ "saddlebrown", NSVG_RGB(139, 69, 19) },
	{ "salmon", NSVG_RGB(250, 128, 114) },
	{ "sandybrown", NSVG_RGB(244, 164, 96) },
	{ "seagreen", NSVG_RGB( 46, 139, 87) },
	{ "seashell", NSVG_RGB(255, 245, 238) },
	{ "sienna", NSVG_RGB(160, 82, 45) },
	{ "silver", NSVG_RGB(192, 192, 192) },
	{ "skyblue", NSVG_RGB(135, 206, 235) },
	{ "slateblue", NSVG_RGB(106, 90, 205) },
	{ "slategray", NSVG_RGB(112, 128, 144) },
	{ "slategrey", NSVG_RGB(112, 128, 144) },
	{ "snow", NSVG_RGB(255, 250, 250) },
	{ "springgreen", NSVG_RGB( 0, 255, 127) },
	{ "steelblue", NSVG_RGB( 70, 130, 180) },
	{ "tan", NSVG_RGB(210, 180, 140) },
	{ "teal", NSVG_RGB( 0, 128, 128) },
	{ "thistle", NSVG_RGB(216, 191, 216) },
	{ "tomato", NSVG_RGB(255, 99, 71) },
	{ "turquoise", NSVG_RGB( 64, 224, 208) },
	{ "violet", NSVG_RGB(238, 130, 238) },
	{ "wheat", NSVG_RGB(245, 222, 179) },
	{ "whitesmoke", NSVG_RGB(245, 245, 245) },
	{ "yellowgreen", NSVG_RGB(154, 205, 50) },
#endif
};

static unsigned int nsvg__parseColorName(const char* str)
{
	int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);

	for (i = 0; i < ncolors; i++) {
		if (strcmp(nsvg__colors[i].name, str) == 0) {
			return nsvg__colors[i].color;
		}
	}

	return NSVG_RGB(128, 128, 128);
}

static unsigned int nsvg__parseColor(const char* str)
{
	size_t len = 0;
	while(*str == ' ') ++str;
	len = strlen(str);
	if (len >= 1 && *str == '#')
		return nsvg__parseColorHex(str);
	else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
		return nsvg__parseColorRGB(str);
	return nsvg__parseColorName(str);
}

static float nsvg__parseOpacity(const char* str)
{
	float val = 0;
	sscanf(str, "%f", &val);
	if (val < 0.0f) val = 0.0f;
	if (val > 1.0f) val = 1.0f;
	return val;
}

static float nsvg__parseMiterLimit(const char* str)
{
	float val = 0;
	sscanf(str, "%f", &val);
	if (val < 0.0f) val = 0.0f;
	return val;
}

static int nsvg__parseUnits(const char* units)
{
	if (units[0] == 'p' && units[1] == 'x')
		return NSVG_UNITS_PX;
	else if (units[0] == 'p' && units[1] == 't')
		return NSVG_UNITS_PT;
	else if (units[0] == 'p' && units[1] == 'c')
		return NSVG_UNITS_PC;
	else if (units[0] == 'm' && units[1] == 'm')
		return NSVG_UNITS_MM;
	else if (units[0] == 'c' && units[1] == 'm')
		return NSVG_UNITS_CM;
	else if (units[0] == 'i' && units[1] == 'n')
		return NSVG_UNITS_IN;
	else if (units[0] == '%')
		return NSVG_UNITS_PERCENT;
	else if (units[0] == 'e' && units[1] == 'm')
		return NSVG_UNITS_EM;
	else if (units[0] == 'e' && units[1] == 'x')
		return NSVG_UNITS_EX;
	return NSVG_UNITS_USER;
}

static NSVGcoordinate nsvg__parseCoordinateRaw(const char* str)
{
	NSVGcoordinate coord = {0, NSVG_UNITS_USER};
	char units[32]="";
	sscanf(str, "%f%s", &coord.value, units);
	coord.units = nsvg__parseUnits(units);
	return coord;
}

static NSVGcoordinate nsvg__coord(float v, int units)
{
	NSVGcoordinate coord = {v, units};
	return coord;
}

static float nsvg__parseCoordinate(NSVGparser* p, const char* str, float orig, float length)
{
	NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
	return nsvg__convertToPixels(p, coord, orig, length);
}

static int nsvg__parseTransformArgs(const char* str, float* args, int maxNa, int* na)
{
	const char* end;
	const char* ptr;
	char it[64];

	*na = 0;
	ptr = str;
	while (*ptr && *ptr != '(') ++ptr;
	if (*ptr == 0)
		return 1;
	end = ptr;
	while (*end && *end != ')') ++end;
	if (*end == 0)
		return 1;

	while (ptr < end) {
		if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
			if (*na >= maxNa) return 0;
			ptr = nsvg__parseNumber(ptr, it, 64);
			args[(*na)++] = (float)nsvg__atof(it);
		} else {
			++ptr;
		}
	}
	return (int)(end - str);
}


static int nsvg__parseMatrix(float* xform, const char* str)
{
	float t[6];
	int na = 0;
	int len = nsvg__parseTransformArgs(str, t, 6, &na);
	if (na != 6) return len;
	memcpy(xform, t, sizeof(float)*6);
	return len;
}

static int nsvg__parseTranslate(float* xform, const char* str)
{
	float args[2];
	float t[6];
	int na = 0;
	int len = nsvg__parseTransformArgs(str, args, 2, &na);
	if (na == 1) args[1] = 0.0;

	nsvg__xformSetTranslation(t, args[0], args[1]);
	memcpy(xform, t, sizeof(float)*6);
	return len;
}

static int nsvg__parseScale(float* xform, const char* str)
{
	float args[2];
	int na = 0;
	float t[6];
	int len = nsvg__parseTransformArgs(str, args, 2, &na);
	if (na == 1) args[1] = args[0];
	nsvg__xformSetScale(t, args[0], args[1]);
	memcpy(xform, t, sizeof(float)*6);
	return len;
}

static int nsvg__parseSkewX(float* xform, const char* str)
{
	float args[1];
	int na = 0;
	float t[6];
	int len = nsvg__parseTransformArgs(str, args, 1, &na);
	nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
	memcpy(xform, t, sizeof(float)*6);
	return len;
}

static int nsvg__parseSkewY(float* xform, const char* str)
{
	float args[1];
	int na = 0;
	float t[6];
	int len = nsvg__parseTransformArgs(str, args, 1, &na);
	nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
	memcpy(xform, t, sizeof(float)*6);
	return len;
}

static int nsvg__parseRotate(float* xform, const char* str)
{
	float args[3];
	int na = 0;
	float m[6];
	float t[6];
	int len = nsvg__parseTransformArgs(str, args, 3, &na);
	if (na == 1)
		args[1] = args[2] = 0.0f;
	nsvg__xformIdentity(m);

	if (na > 1) {
		nsvg__xformSetTranslation(t, -args[1], -args[2]);
		nsvg__xformMultiply(m, t);
	}

	nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
	nsvg__xformMultiply(m, t);

	if (na > 1) {
		nsvg__xformSetTranslation(t, args[1], args[2]);
		nsvg__xformMultiply(m, t);
	}

	memcpy(xform, m, sizeof(float)*6);

	return len;
}

static void nsvg__parseTransform(float* xform, const char* str)
{
	float t[6];
	nsvg__xformIdentity(xform);
	while (*str)
	{
		if (strncmp(str, "matrix", 6) == 0)
			str += nsvg__parseMatrix(t, str);
		else if (strncmp(str, "translate", 9) == 0)
			str += nsvg__parseTranslate(t, str);
		else if (strncmp(str, "scale", 5) == 0)
			str += nsvg__parseScale(t, str);
		else if (strncmp(str, "rotate", 6) == 0)
			str += nsvg__parseRotate(t, str);
		else if (strncmp(str, "skewX", 5) == 0)
			str += nsvg__parseSkewX(t, str);
		else if (strncmp(str, "skewY", 5) == 0)
			str += nsvg__parseSkewY(t, str);
		else{
			++str;
			continue;
		}

		nsvg__xformPremultiply(xform, t);
	}
}

static void nsvg__parseUrl(char* id, const char* str)
{
	int i = 0;
	str += 4; // "url(";
	if (*str == '#')
		str++;
	while (i < 63 && *str != ')') {
		id[i] = *str++;
		i++;
	}
	id[i] = '\0';
}

static char nsvg__parseLineCap(const char* str)
{
	if (strcmp(str, "butt") == 0)
		return NSVG_CAP_BUTT;
	else if (strcmp(str, "round") == 0)
		return NSVG_CAP_ROUND;
	else if (strcmp(str, "square") == 0)
		return NSVG_CAP_SQUARE;
	// TODO: handle inherit.
	return NSVG_CAP_BUTT;
}

static char nsvg__parseLineJoin(const char* str)
{
	if (strcmp(str, "miter") == 0)
		return NSVG_JOIN_MITER;
	else if (strcmp(str, "round") == 0)
		return NSVG_JOIN_ROUND;
	else if (strcmp(str, "bevel") == 0)
		return NSVG_JOIN_BEVEL;
	// TODO: handle inherit.
	return NSVG_JOIN_MITER;
}

static char nsvg__parseFillRule(const char* str)
{
	if (strcmp(str, "nonzero") == 0)
		return NSVG_FILLRULE_NONZERO;
	else if (strcmp(str, "evenodd") == 0)
		return NSVG_FILLRULE_EVENODD;
	// TODO: handle inherit.
	return NSVG_FILLRULE_NONZERO;
}

static const char* nsvg__getNextDashItem(const char* s, char* it)
{
	int n = 0;
	it[0] = '\0';
	// Skip white spaces and commas
	while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
	// Advance until whitespace, comma or end.
	while (*s && (!nsvg__isspace(*s) && *s != ',')) {
		if (n < 63)
			it[n++] = *s;
		s++;
	}
	it[n++] = '\0';
	return s;
}

static int nsvg__parseStrokeDashArray(NSVGparser* p, const char* str, float* strokeDashArray)
{
	char item[64];
	int count = 0, i;
	float sum = 0.0f;

	// Handle "none"
	if (str[0] == 'n')
		return 0;

	// Parse dashes
	while (*str) {
		str = nsvg__getNextDashItem(str, item);
		if (!*item) break;
		if (count < NSVG_MAX_DASHES)
			strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
	}

	for (i = 0; i < count; i++)
		sum += strokeDashArray[i];
	if (sum <= 1e-6f)
		count = 0;

	return count;
}

static void nsvg__parseStyle(NSVGparser* p, const char* str);

static int nsvg__parseAttr(NSVGparser* p, const char* name, const char* value)
{
	float xform[6];
	NSVGattrib* attr = nsvg__getAttr(p);
	if (!attr) return 0;

	if (strcmp(name, "style") == 0) {
		nsvg__parseStyle(p, value);
	} else if (strcmp(name, "display") == 0) {
		if (strcmp(value, "none") == 0)
			attr->visible &= ~NSVG_VIS_DISPLAY;
		// Don't reset ->visible on display:inline, one display:none hides the whole subtree

	} else if (strcmp(name, "visibility") == 0) {
		if (strcmp(value, "hidden") == 0) {
			attr->visible &= ~NSVG_VIS_VISIBLE;
		} else if (strcmp(value, "visible") == 0) {
			attr->visible |= NSVG_VIS_VISIBLE;
		}
	} else if (strcmp(name, "fill") == 0) {
		if (strcmp(value, "none") == 0) {
			attr->hasFill = 0;
		} else if (strncmp(value, "url(", 4) == 0) {
			attr->hasFill = 2;
			nsvg__parseUrl(attr->fillGradient, value);
		} else {
			attr->hasFill = 1;
			attr->fillColor = nsvg__parseColor(value);
		}
	} else if (strcmp(name, "opacity") == 0) {
		attr->opacity = nsvg__parseOpacity(value);
	} else if (strcmp(name, "fill-opacity") == 0) {
		attr->fillOpacity = nsvg__parseOpacity(value);
	} else if (strcmp(name, "stroke") == 0) {
		if (strcmp(value, "none") == 0) {
			attr->hasStroke = 0;
		} else if (strncmp(value, "url(", 4) == 0) {
			attr->hasStroke = 2;
			nsvg__parseUrl(attr->strokeGradient, value);
		} else {
			attr->hasStroke = 1;
			attr->strokeColor = nsvg__parseColor(value);
		}
	} else if (strcmp(name, "stroke-width") == 0) {
		attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
	} else if (strcmp(name, "stroke-dasharray") == 0) {
		attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
	} else if (strcmp(name, "stroke-dashoffset") == 0) {
		attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
	} else if (strcmp(name, "stroke-opacity") == 0) {
		attr->strokeOpacity = nsvg__parseOpacity(value);
	} else if (strcmp(name, "stroke-linecap") == 0) {
		attr->strokeLineCap = nsvg__parseLineCap(value);
	} else if (strcmp(name, "stroke-linejoin") == 0) {
		attr->strokeLineJoin = nsvg__parseLineJoin(value);
	} else if (strcmp(name, "stroke-miterlimit") == 0) {
		attr->miterLimit = nsvg__parseMiterLimit(value);
	} else if (strcmp(name, "fill-rule") == 0) {
		attr->fillRule = nsvg__parseFillRule(value);
	} else if (strcmp(name, "font-size") == 0) {
		attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
	} else if (strcmp(name, "transform") == 0) {
		nsvg__parseTransform(xform, value);
		nsvg__xformPremultiply(attr->xform, xform);
	} else if (strcmp(name, "stop-color") == 0) {
		attr->stopColor = nsvg__parseColor(value);
	} else if (strcmp(name, "stop-opacity") == 0) {
		attr->stopOpacity = nsvg__parseOpacity(value);
	} else if (strcmp(name, "offset") == 0) {
		attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
	} else if (strcmp(name, "id") == 0) {
		strncpy(attr->id, value, 63);
		attr->id[63] = '\0';
	} else if (strcmp(name, "class") == 0) {
		NSVGstyles* style = p->styles;
		while (style) {
			if (strcmp(style->name + 1, value) == 0) {
				break;
			}
			style = style->next;
		}
		if (style) {
			nsvg__parseStyle(p, style->description);
		}
	} else {
		return 0;
	}
	return 1;
}

static int nsvg__parseNameValue(NSVGparser* p, const char* start, const char* end)
{
	const char* str;
	const char* val;
	char name[512];
	char value[512];
	int n;

	str = start;
	while (str < end && *str != ':') ++str;

	val = str;

	// Right Trim
	while (str > start &&  (*str == ':' || nsvg__isspace(*str))) --str;
	++str;

	n = (int)(str - start);
	if (n > 511) n = 511;
	if (n) memcpy(name, start, n);
	name[n] = 0;

	while (val < end && (*val == ':' || nsvg__isspace(*val))) ++val;

	n = (int)(end - val);
	if (n > 511) n = 511;
	if (n) memcpy(value, val, n);
	value[n] = 0;

	return nsvg__parseAttr(p, name, value);
}

static void nsvg__parseStyle(NSVGparser* p, const char* str)
{
	const char* start;
	const char* end;

	while (*str) {
		// Left Trim
		while(*str && nsvg__isspace(*str)) ++str;
		start = str;
		while(*str && *str != ';') ++str;
		end = str;

		// Right Trim
		while (end > start &&  (*end == ';' || nsvg__isspace(*end))) --end;
		++end;

		nsvg__parseNameValue(p, start, end);
		if (*str) ++str;
	}
}

static void nsvg__parseAttribs(NSVGparser* p, const char** attr)
{
	int i;
	for (i = 0; attr[i]; i += 2)
	{
		if (strcmp(attr[i], "style") == 0)
			nsvg__parseStyle(p, attr[i + 1]);
		else
			nsvg__parseAttr(p, attr[i], attr[i + 1]);
	}
}

static int nsvg__getArgsPerElement(char cmd)
{
	switch (cmd) {
		case 'v':
		case 'V':
		case 'h':
		case 'H':
			return 1;
		case 'm':
		case 'M':
		case 'l':
		case 'L':
		case 't':
		case 'T':
			return 2;
		case 'q':
		case 'Q':
		case 's':
		case 'S':
			return 4;
		case 'c':
		case 'C':
			return 6;
		case 'a':
		case 'A':
			return 7;
	}
	return 0;
}

static void nsvg__pathMoveTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
	if (rel) {
		*cpx += args[0];
		*cpy += args[1];
	} else {
		*cpx = args[0];
		*cpy = args[1];
	}
	nsvg__moveTo(p, *cpx, *cpy);
}

static void nsvg__pathLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
	if (rel) {
		*cpx += args[0];
		*cpy += args[1];
	} else {
		*cpx = args[0];
		*cpy = args[1];
	}
	nsvg__lineTo(p, *cpx, *cpy);
}

static void nsvg__pathHLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
	if (rel)
		*cpx += args[0];
	else
		*cpx = args[0];
	nsvg__lineTo(p, *cpx, *cpy);
}

static void nsvg__pathVLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
	if (rel)
		*cpy += args[0];
	else
		*cpy = args[0];
	nsvg__lineTo(p, *cpx, *cpy);
}

static void nsvg__pathCubicBezTo(NSVGparser* p, float* cpx, float* cpy,
								 float* cpx2, float* cpy2, float* args, int rel)
{
	float x2, y2, cx1, cy1, cx2, cy2;

	if (rel) {
		cx1 = *cpx + args[0];
		cy1 = *cpy + args[1];
		cx2 = *cpx + args[2];
		cy2 = *cpy + args[3];
		x2 = *cpx + args[4];
		y2 = *cpy + args[5];
	} else {
		cx1 = args[0];
		cy1 = args[1];
		cx2 = args[2];
		cy2 = args[3];
		x2 = args[4];
		y2 = args[5];
	}

	nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);

	*cpx2 = cx2;
	*cpy2 = cy2;
	*cpx = x2;
	*cpy = y2;
}

static void nsvg__pathCubicBezShortTo(NSVGparser* p, float* cpx, float* cpy,
									  float* cpx2, float* cpy2, float* args, int rel)
{
	float x1, y1, x2, y2, cx1, cy1, cx2, cy2;

	x1 = *cpx;
	y1 = *cpy;
	if (rel) {
		cx2 = *cpx + args[0];
		cy2 = *cpy + args[1];
		x2 = *cpx + args[2];
		y2 = *cpy + args[3];
	} else {
		cx2 = args[0];
		cy2 = args[1];
		x2 = args[2];
		y2 = args[3];
	}

	cx1 = 2*x1 - *cpx2;
	cy1 = 2*y1 - *cpy2;

	nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);

	*cpx2 = cx2;
	*cpy2 = cy2;
	*cpx = x2;
	*cpy = y2;
}

static void nsvg__pathQuadBezTo(NSVGparser* p, float* cpx, float* cpy,
								float* cpx2, float* cpy2, float* args, int rel)
{
	float x1, y1, x2, y2, cx, cy;
	float cx1, cy1, cx2, cy2;

	x1 = *cpx;
	y1 = *cpy;
	if (rel) {
		cx = *cpx + args[0];
		cy = *cpy + args[1];
		x2 = *cpx + args[2];
		y2 = *cpy + args[3];
	} else {
		cx = args[0];
		cy = args[1];
		x2 = args[2];
		y2 = args[3];
	}

	// Convert to cubic bezier
	cx1 = x1 + 2.0f/3.0f*(cx - x1);
	cy1 = y1 + 2.0f/3.0f*(cy - y1);
	cx2 = x2 + 2.0f/3.0f*(cx - x2);
	cy2 = y2 + 2.0f/3.0f*(cy - y2);

	nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);

	*cpx2 = cx;
	*cpy2 = cy;
	*cpx = x2;
	*cpy = y2;
}

static void nsvg__pathQuadBezShortTo(NSVGparser* p, float* cpx, float* cpy,
									 float* cpx2, float* cpy2, float* args, int rel)
{
	float x1, y1, x2, y2, cx, cy;
	float cx1, cy1, cx2, cy2;

	x1 = *cpx;
	y1 = *cpy;
	if (rel) {
		x2 = *cpx + args[0];
		y2 = *cpy + args[1];
	} else {
		x2 = args[0];
		y2 = args[1];
	}

	cx = 2*x1 - *cpx2;
	cy = 2*y1 - *cpy2;

	// Convert to cubix bezier
	cx1 = x1 + 2.0f/3.0f*(cx - x1);
	cy1 = y1 + 2.0f/3.0f*(cy - y1);
	cx2 = x2 + 2.0f/3.0f*(cx - x2);
	cy2 = y2 + 2.0f/3.0f*(cy - y2);

	nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);

	*cpx2 = cx;
	*cpy2 = cy;
	*cpx = x2;
	*cpy = y2;
}

static float nsvg__sqr(float x) { return x*x; }
static float nsvg__vmag(float x, float y) { return sqrtf(x*x + y*y); }

static float nsvg__vecrat(float ux, float uy, float vx, float vy)
{
	return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
}

static float nsvg__vecang(float ux, float uy, float vx, float vy)
{
	float r = nsvg__vecrat(ux,uy, vx,vy);
	if (r < -1.0f) r = -1.0f;
	if (r > 1.0f) r = 1.0f;
	return ((ux*vy < uy*vx) ? -1.0f : 1.0f) * acosf(r);
}

static void nsvg__pathArcTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
	// Ported from canvg (https://code.google.com/p/canvg/)
	float rx, ry, rotx;
	float x1, y1, x2, y2, cx, cy, dx, dy, d;
	float x1p, y1p, cxp, cyp, s, sa, sb;
	float ux, uy, vx, vy, a1, da;
	float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
	float sinrx, cosrx;
	int fa, fs;
	int i, ndivs;
	float hda, kappa;

	rx = fabsf(args[0]);				// y radius
	ry = fabsf(args[1]);				// x radius
	rotx = args[2] / 180.0f * NSVG_PI;		// x rotation angle
	fa = fabsf(args[3]) > 1e-6 ? 1 : 0;	// Large arc
	fs = fabsf(args[4]) > 1e-6 ? 1 : 0;	// Sweep direction
	x1 = *cpx;							// start point
	y1 = *cpy;
	if (rel) {							// end point
		x2 = *cpx + args[5];
		y2 = *cpy + args[6];
	} else {
		x2 = args[5];
		y2 = args[6];
	}

	dx = x1 - x2;
	dy = y1 - y2;
	d = sqrtf(dx*dx + dy*dy);
	if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
		// The arc degenerates to a line
		nsvg__lineTo(p, x2, y2);
		*cpx = x2;
		*cpy = y2;
		return;
	}

	sinrx = sinf(rotx);
	cosrx = cosf(rotx);

	// Convert to center point parameterization.
	// http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
	// 1) Compute x1', y1'
	x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
	y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
	d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
	if (d > 1) {
		d = sqrtf(d);
		rx *= d;
		ry *= d;
	}
	// 2) Compute cx', cy'
	s = 0.0f;
	sa = nsvg__sqr(rx)*nsvg__sqr(ry) - nsvg__sqr(rx)*nsvg__sqr(y1p) - nsvg__sqr(ry)*nsvg__sqr(x1p);
	sb = nsvg__sqr(rx)*nsvg__sqr(y1p) + nsvg__sqr(ry)*nsvg__sqr(x1p);
	if (sa < 0.0f) sa = 0.0f;
	if (sb > 0.0f)
		s = sqrtf(sa / sb);
	if (fa == fs)
		s = -s;
	cxp = s * rx * y1p / ry;
	cyp = s * -ry * x1p / rx;

	// 3) Compute cx,cy from cx',cy'
	cx = (x1 + x2)/2.0f + cosrx*cxp - sinrx*cyp;
	cy = (y1 + y2)/2.0f + sinrx*cxp + cosrx*cyp;

	// 4) Calculate theta1, and delta theta.
	ux = (x1p - cxp) / rx;
	uy = (y1p - cyp) / ry;
	vx = (-x1p - cxp) / rx;
	vy = (-y1p - cyp) / ry;
	a1 = nsvg__vecang(1.0f,0.0f, ux,uy);	// Initial angle
	da = nsvg__vecang(ux,uy, vx,vy);		// Delta angle

//	if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
//	if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;

	if (fs == 0 && da > 0)
		da -= 2 * NSVG_PI;
	else if (fs == 1 && da < 0)
		da += 2 * NSVG_PI;

	// Approximate the arc using cubic spline segments.
	t[0] = cosrx; t[1] = sinrx;
	t[2] = -sinrx; t[3] = cosrx;
	t[4] = cx; t[5] = cy;

	// Split arc into max 90 degree segments.
	// The loop assumes an iteration per end point (including start and end), this +1.
	ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);
	hda = (da / (float)ndivs) / 2.0f;
	kappa = fabsf(4.0f / 3.0f * (1.0f - cosf(hda)) / sinf(hda));
	if (da < 0.0f)
		kappa = -kappa;

	for (i = 0; i <= ndivs; i++) {
		a = a1 + da * ((float)i/(float)ndivs);
		dx = cosf(a);
		dy = sinf(a);
		nsvg__xformPoint(&x, &y, dx*rx, dy*ry, t); // position
		nsvg__xformVec(&tanx, &tany, -dy*rx * kappa, dx*ry * kappa, t); // tangent
		if (i > 0)
			nsvg__cubicBezTo(p, px+ptanx,py+ptany, x-tanx, y-tany, x, y);
		px = x;
		py = y;
		ptanx = tanx;
		ptany = tany;
	}

	*cpx = x2;
	*cpy = y2;
}

static void nsvg__parsePath(NSVGparser* p, const char** attr)
{
	const char* s = NULL;
	char cmd = '\0';
	float args[10];
	int nargs;
	int rargs = 0;
	float cpx, cpy, cpx2, cpy2;
	const char* tmp[4];
	char closedFlag;
	int i;
	char item[64];

	for (i = 0; attr[i]; i += 2) {
		if (strcmp(attr[i], "d") == 0) {
			s = attr[i + 1];
		} else {
			tmp[0] = attr[i];
			tmp[1] = attr[i + 1];
			tmp[2] = 0;
			tmp[3] = 0;
			nsvg__parseAttribs(p, tmp);
		}
	}

	if (s) {
		nsvg__resetPath(p);
		cpx = 0; cpy = 0;
		cpx2 = 0; cpy2 = 0;
		closedFlag = 0;
		nargs = 0;

		while (*s) {
			s = nsvg__getNextPathItem(s, item);
			if (!*item) break;
			if (nsvg__isnum(item[0])) {
				if (nargs < 10)
					args[nargs++] = (float)nsvg__atof(item);
				if (nargs >= rargs) {
					switch (cmd) {
						case 'm':
						case 'M':
							nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
							// Moveto can be followed by multiple coordinate pairs,
							// which should be treated as linetos.
							cmd = (cmd == 'm') ? 'l' : 'L';
							rargs = nsvg__getArgsPerElement(cmd);
							cpx2 = cpx; cpy2 = cpy;
							break;
						case 'l':
						case 'L':
							nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
							cpx2 = cpx; cpy2 = cpy;
							break;
						case 'H':
						case 'h':
							nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
							cpx2 = cpx; cpy2 = cpy;
							break;
						case 'V':
						case 'v':
							nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
							cpx2 = cpx; cpy2 = cpy;
							break;
						case 'C':
						case 'c':
							nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
							break;
						case 'S':
						case 's':
							nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
							break;
						case 'Q':
						case 'q':
							nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
							break;
						case 'T':
						case 't':
							nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
							break;
						case 'A':
						case 'a':
							nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
							cpx2 = cpx; cpy2 = cpy;
							break;
						default:
							if (nargs >= 2) {
								cpx = args[nargs-2];
								cpy = args[nargs-1];
								cpx2 = cpx; cpy2 = cpy;
							}
							break;
					}
					nargs = 0;
				}
			} else {
				cmd = item[0];
				rargs = nsvg__getArgsPerElement(cmd);
				if (cmd == 'M' || cmd == 'm') {
					// Commit path.
					if (p->npts > 0)
						nsvg__addPath(p, closedFlag);
					// Start new subpath.
					nsvg__resetPath(p);
					closedFlag = 0;
					nargs = 0;
				} else if (cmd == 'Z' || cmd == 'z') {
					closedFlag = 1;
					// Commit path.
					if (p->npts > 0) {
						// Move current point to first point
						cpx = p->pts[0];
						cpy = p->pts[1];
						cpx2 = cpx; cpy2 = cpy;
						nsvg__addPath(p, closedFlag);
					}
					// Start new subpath.
					nsvg__resetPath(p);
					nsvg__moveTo(p, cpx, cpy);
					closedFlag = 0;
					nargs = 0;
				}
			}
		}
		// Commit path.
		if (p->npts)
			nsvg__addPath(p, closedFlag);
	}

	nsvg__addShape(p);
}

static void nsvg__parseRect(NSVGparser* p, const char** attr)
{
	float x = 0.0f;
	float y = 0.0f;
	float w = 0.0f;
	float h = 0.0f;
	float rx = -1.0f; // marks not set
	float ry = -1.0f;
	int i;

	for (i = 0; attr[i]; i += 2) {
		if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
			if (strcmp(attr[i], "x") == 0) x = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
			if (strcmp(attr[i], "y") == 0) y = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
			if (strcmp(attr[i], "width") == 0) w = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p));
			if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p));
			if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
			if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
		}
	}

	if (rx < 0.0f && ry > 0.0f) rx = ry;
	if (ry < 0.0f && rx > 0.0f) ry = rx;
	if (rx < 0.0f) rx = 0.0f;
	if (ry < 0.0f) ry = 0.0f;
	if (rx > w/2.0f) rx = w/2.0f;
	if (ry > h/2.0f) ry = h/2.0f;

	if (w != 0.0f && h != 0.0f) {
		nsvg__resetPath(p);

		if (rx < 0.00001f || ry < 0.0001f) {
			nsvg__moveTo(p, x, y);
			nsvg__lineTo(p, x+w, y);
			nsvg__lineTo(p, x+w, y+h);
			nsvg__lineTo(p, x, y+h);
		} else {
			// Rounded rectangle
			nsvg__moveTo(p, x+rx, y);
			nsvg__lineTo(p, x+w-rx, y);
			nsvg__cubicBezTo(p, x+w-rx*(1-NSVG_KAPPA90), y, x+w, y+ry*(1-NSVG_KAPPA90), x+w, y+ry);
			nsvg__lineTo(p, x+w, y+h-ry);
			nsvg__cubicBezTo(p, x+w, y+h-ry*(1-NSVG_KAPPA90), x+w-rx*(1-NSVG_KAPPA90), y+h, x+w-rx, y+h);
			nsvg__lineTo(p, x+rx, y+h);
			nsvg__cubicBezTo(p, x+rx*(1-NSVG_KAPPA90), y+h, x, y+h-ry*(1-NSVG_KAPPA90), x, y+h-ry);
			nsvg__lineTo(p, x, y+ry);
			nsvg__cubicBezTo(p, x, y+ry*(1-NSVG_KAPPA90), x+rx*(1-NSVG_KAPPA90), y, x+rx, y);
		}

		nsvg__addPath(p, 1);

		nsvg__addShape(p);
	}
}

static void nsvg__parseCircle(NSVGparser* p, const char** attr)
{
	float cx = 0.0f;
	float cy = 0.0f;
	float r = 0.0f;
	int i;

	for (i = 0; attr[i]; i += 2) {
		if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
			if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
			if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
			if (strcmp(attr[i], "r") == 0) r = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualLength(p)));
		}
	}

	if (r > 0.0f) {
		nsvg__resetPath(p);

		nsvg__moveTo(p, cx+r, cy);
		nsvg__cubicBezTo(p, cx+r, cy+r*NSVG_KAPPA90, cx+r*NSVG_KAPPA90, cy+r, cx, cy+r);
		nsvg__cubicBezTo(p, cx-r*NSVG_KAPPA90, cy+r, cx-r, cy+r*NSVG_KAPPA90, cx-r, cy);
		nsvg__cubicBezTo(p, cx-r, cy-r*NSVG_KAPPA90, cx-r*NSVG_KAPPA90, cy-r, cx, cy-r);
		nsvg__cubicBezTo(p, cx+r*NSVG_KAPPA90, cy-r, cx+r, cy-r*NSVG_KAPPA90, cx+r, cy);

		nsvg__addPath(p, 1);

		nsvg__addShape(p);
	}
}

static void nsvg__parseEllipse(NSVGparser* p, const char** attr)
{
	float cx = 0.0f;
	float cy = 0.0f;
	float rx = 0.0f;
	float ry = 0.0f;
	int i;

	for (i = 0; attr[i]; i += 2) {
		if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
			if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
			if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
			if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
			if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
		}
	}

	if (rx > 0.0f && ry > 0.0f) {

		nsvg__resetPath(p);

		nsvg__moveTo(p, cx+rx, cy);
		nsvg__cubicBezTo(p, cx+rx, cy+ry*NSVG_KAPPA90, cx+rx*NSVG_KAPPA90, cy+ry, cx, cy+ry);
		nsvg__cubicBezTo(p, cx-rx*NSVG_KAPPA90, cy+ry, cx-rx, cy+ry*NSVG_KAPPA90, cx-rx, cy);
		nsvg__cubicBezTo(p, cx-rx, cy-ry*NSVG_KAPPA90, cx-rx*NSVG_KAPPA90, cy-ry, cx, cy-ry);
		nsvg__cubicBezTo(p, cx+rx*NSVG_KAPPA90, cy-ry, cx+rx, cy-ry*NSVG_KAPPA90, cx+rx, cy);

		nsvg__addPath(p, 1);

		nsvg__addShape(p);
	}
}

static void nsvg__parseLine(NSVGparser* p, const char** attr)
{
	float x1 = 0.0;
	float y1 = 0.0;
	float x2 = 0.0;
	float y2 = 0.0;
	int i;

	for (i = 0; attr[i]; i += 2) {
		if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
			if (strcmp(attr[i], "x1") == 0) x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
			if (strcmp(attr[i], "y1") == 0) y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
			if (strcmp(attr[i], "x2") == 0) x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
			if (strcmp(attr[i], "y2") == 0) y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
		}
	}

	nsvg__resetPath(p);

	nsvg__moveTo(p, x1, y1);
	nsvg__lineTo(p, x2, y2);

	nsvg__addPath(p, 0);

	nsvg__addShape(p);
}

static void nsvg__parsePoly(NSVGparser* p, const char** attr, int closeFlag)
{
	int i;
	const char* s;
	float args[2];
	int nargs, npts = 0;
	char item[64];

	nsvg__resetPath(p);

	for (i = 0; attr[i]; i += 2) {
		if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
			if (strcmp(attr[i], "points") == 0) {
				s = attr[i + 1];
				nargs = 0;
				while (*s) {
					s = nsvg__getNextPathItem(s, item);
					args[nargs++] = (float)nsvg__atof(item);
					if (nargs >= 2) {
						if (npts == 0)
							nsvg__moveTo(p, args[0], args[1]);
						else
							nsvg__lineTo(p, args[0], args[1]);
						nargs = 0;
						npts++;
					}
				}
			}
		}
	}

	nsvg__addPath(p, (char)closeFlag);

	nsvg__addShape(p);
}

static void nsvg__parseSVG(NSVGparser* p, const char** attr)
{
	int i;
	for (i = 0; attr[i]; i += 2) {
		if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
			if (strcmp(attr[i], "width") == 0) {
				p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
			} else if (strcmp(attr[i], "height") == 0) {
				p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
			} else if (strcmp(attr[i], "viewBox") == 0) {
				sscanf(attr[i + 1], "%f%*[%%, \t]%f%*[%%, \t]%f%*[%%, \t]%f", &p->viewMinx, &p->viewMiny, &p->viewWidth, &p->viewHeight);
			} else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
				if (strstr(attr[i + 1], "none") != 0) {
					// No uniform scaling
					p->alignType = NSVG_ALIGN_NONE;
				} else {
					// Parse X align
					if (strstr(attr[i + 1], "xMin") != 0)
						p->alignX = NSVG_ALIGN_MIN;
					else if (strstr(attr[i + 1], "xMid") != 0)
						p->alignX = NSVG_ALIGN_MID;
					else if (strstr(attr[i + 1], "xMax") != 0)
						p->alignX = NSVG_ALIGN_MAX;
					// Parse X align
					if (strstr(attr[i + 1], "yMin") != 0)
						p->alignY = NSVG_ALIGN_MIN;
					else if (strstr(attr[i + 1], "yMid") != 0)
						p->alignY = NSVG_ALIGN_MID;
					else if (strstr(attr[i + 1], "yMax") != 0)
						p->alignY = NSVG_ALIGN_MAX;
					// Parse meet/slice
					p->alignType = NSVG_ALIGN_MEET;
					if (strstr(attr[i + 1], "slice") != 0)
						p->alignType = NSVG_ALIGN_SLICE;
				}
			}
		}
	}
}

static void nsvg__parseGradient(NSVGparser* p, const char** attr, char type)
{
	int i;
	NSVGgradientData* grad = (NSVGgradientData*)NANOSVG_malloc(sizeof(NSVGgradientData));
	if (grad == NULL) return;
	memset(grad, 0, sizeof(NSVGgradientData));
	grad->units = NSVG_OBJECT_SPACE;
	grad->type = type;
	if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
		grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
		grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
		grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
		grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
	} else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
		grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
		grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
		grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
	}

	nsvg__xformIdentity(grad->xform);

	for (i = 0; attr[i]; i += 2) {
		if (strcmp(attr[i], "id") == 0) {
			strncpy(grad->id, attr[i+1], 63);
			grad->id[63] = '\0';
		} else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
			if (strcmp(attr[i], "gradientUnits") == 0) {
				if (strcmp(attr[i+1], "objectBoundingBox") == 0)
					grad->units = NSVG_OBJECT_SPACE;
				else
					grad->units = NSVG_USER_SPACE;
			} else if (strcmp(attr[i], "gradientTransform") == 0) {
				nsvg__parseTransform(grad->xform, attr[i + 1]);
			} else if (strcmp(attr[i], "cx") == 0) {
				grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "cy") == 0) {
				grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "r") == 0) {
				grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "fx") == 0) {
				grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "fy") == 0) {
				grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "x1") == 0) {
				grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "y1") == 0) {
				grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "x2") == 0) {
				grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "y2") == 0) {
				grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
			} else if (strcmp(attr[i], "spreadMethod") == 0) {
				if (strcmp(attr[i+1], "pad") == 0)
					grad->spread = NSVG_SPREAD_PAD;
				else if (strcmp(attr[i+1], "reflect") == 0)
					grad->spread = NSVG_SPREAD_REFLECT;
				else if (strcmp(attr[i+1], "repeat") == 0)
					grad->spread = NSVG_SPREAD_REPEAT;
			} else if (strcmp(attr[i], "xlink:href") == 0) {
				const char *href = attr[i+1];
				strncpy(grad->ref, href+1, 62);
				grad->ref[62] = '\0';
			}
		}
	}

	grad->next = p->gradients;
	p->gradients = grad;
}

static void nsvg__parseGradientStop(NSVGparser* p, const char** attr)
{
	NSVGattrib* curAttr = nsvg__getAttr(p);
	NSVGgradientData* grad;
	NSVGgradientStop* stop;
	int i, idx;

	curAttr->stopOffset = 0;
	curAttr->stopColor = 0;
	curAttr->stopOpacity = 1.0f;

	for (i = 0; attr[i]; i += 2) {
		nsvg__parseAttr(p, attr[i], attr[i + 1]);
	}

	// Add stop to the last gradient.
	grad = p->gradients;
	if (grad == NULL) return;

	grad->nstops++;
	grad->stops = (NSVGgradientStop*)NANOSVG_realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops);
	if (grad->stops == NULL) return;

	// Insert
	idx = grad->nstops-1;
	for (i = 0; i < grad->nstops-1; i++) {
		if (curAttr->stopOffset < grad->stops[i].offset) {
			idx = i;
			break;
		}
	}
	if (idx != grad->nstops-1) {
		for (i = grad->nstops-1; i > idx; i--)
			grad->stops[i] = grad->stops[i-1];
	}

	stop = &grad->stops[idx];
	stop->color = curAttr->stopColor;
	stop->color |= (unsigned int)(curAttr->stopOpacity*255) << 24;
	stop->offset = curAttr->stopOffset;
}

static void nsvg__startElement(void* ud, const char* el, const char** attr)
{
	NSVGparser* p = (NSVGparser*)ud;

	if (p->defsFlag) {
		// Skip everything but gradients in defs
		if (strcmp(el, "linearGradient") == 0) {
			nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
		} else if (strcmp(el, "radialGradient") == 0) {
			nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
		} else if (strcmp(el, "stop") == 0) {
			nsvg__parseGradientStop(p, attr);
		}
		return;
	}

	if (strcmp(el, "g") == 0) {
		nsvg__pushAttr(p);
		nsvg__parseAttribs(p, attr);
	} else if (strcmp(el, "path") == 0) {
		if (p->pathFlag)	// Do not allow nested paths.
			return;
		nsvg__pushAttr(p);
		nsvg__parsePath(p, attr);
		nsvg__popAttr(p);
	} else if (strcmp(el, "rect") == 0) {
		nsvg__pushAttr(p);
		nsvg__parseRect(p, attr);
		nsvg__popAttr(p);
	} else if (strcmp(el, "circle") == 0) {
		nsvg__pushAttr(p);
		nsvg__parseCircle(p, attr);
		nsvg__popAttr(p);
	} else if (strcmp(el, "ellipse") == 0) {
		nsvg__pushAttr(p);
		nsvg__parseEllipse(p, attr);
		nsvg__popAttr(p);
	} else if (strcmp(el, "line") == 0)  {
		nsvg__pushAttr(p);
		nsvg__parseLine(p, attr);
		nsvg__popAttr(p);
	} else if (strcmp(el, "polyline") == 0)  {
		nsvg__pushAttr(p);
		nsvg__parsePoly(p, attr, 0);
		nsvg__popAttr(p);
	} else if (strcmp(el, "polygon") == 0)  {
		nsvg__pushAttr(p);
		nsvg__parsePoly(p, attr, 1);
		nsvg__popAttr(p);
	} else  if (strcmp(el, "linearGradient") == 0) {
		nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
	} else if (strcmp(el, "radialGradient") == 0) {
		nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
	} else if (strcmp(el, "stop") == 0) {
		nsvg__parseGradientStop(p, attr);
	} else if (strcmp(el, "defs") == 0) {
		p->defsFlag = 1;
	} else if (strcmp(el, "svg") == 0) {
		nsvg__parseSVG(p, attr);
	} else if (strcmp(el, "style") == 0) {
		p->styleFlag = 1;
	}
}

static void nsvg__endElement(void* ud, const char* el)
{
	NSVGparser* p = (NSVGparser*)ud;

	if (strcmp(el, "g") == 0) {
		nsvg__popAttr(p);
	} else if (strcmp(el, "path") == 0) {
		p->pathFlag = 0;
	} else if (strcmp(el, "defs") == 0) {
		p->defsFlag = 0;
	} else if (strcmp(el, "style") == 0) {
		p->styleFlag = 0;
	}
}

static char *nsvg__strndup(const char *s, size_t n)
{
	char *result;
	size_t len = strlen(s);

	if (n < len)
		len = n;

	result = (char*)NANOSVG_malloc(len+1);
	if (!result)
		return 0;

	result[len] = '\0';
	return (char *)memcpy(result, s, len);
}

static void nsvg__content(void* ud, const char* s)
{
	NSVGparser* p = (NSVGparser*)ud;
	if (p->styleFlag) {

		int state = 0;
		const char* start = NULL;
		while (*s) {
			char c = *s;
			if (nsvg__isspace(c) || c == '{') {
				if (state == 1) {
					NSVGstyles* next = p->styles;

					p->styles = (NSVGstyles*)malloc(sizeof(NSVGstyles));
					p->styles->next = next;
					p->styles->name = nsvg__strndup(start, (size_t)(s - start));
					start = s + 1;
					state = 2;
				}
			} else if (state == 2 && c == '}') {
				p->styles->description = nsvg__strndup(start, (size_t)(s - start));
				state = 0;
			}
			else if (state == 0) {
				start = s;
				state = 1;
			}
			s++;
		/*
			if (*s == '{' && state == NSVG_XML_CONTENT) {
				// Start of a tag
				*s++ = '\0';
				nsvg__parseContent(mark, contentCb, ud);
				mark = s;
				state = NSVG_XML_TAG;
			}
			else if (*s == '>' && state == NSVG_XML_TAG) {
				// Start of a content or new tag.
				*s++ = '\0';
				nsvg__parseElement(mark, startelCb, endelCb, ud);
				mark = s;
				state = NSVG_XML_CONTENT;
			}
			else {
				s++;
			}
		*/
		}

	}
}

static void nsvg__imageBounds(NSVGparser* p, float* bounds)
{
	NSVGshape* shape;
	shape = p->image->shapes;
	if (shape == NULL) {
		bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
		return;
	}
	bounds[0] = shape->bounds[0];
	bounds[1] = shape->bounds[1];
	bounds[2] = shape->bounds[2];
	bounds[3] = shape->bounds[3];
	for (shape = shape->next; shape != NULL; shape = shape->next) {
		bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
		bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
		bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
		bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
	}
}

static float nsvg__viewAlign(float content, float container, int type)
{
	if (type == NSVG_ALIGN_MIN)
		return 0;
	else if (type == NSVG_ALIGN_MAX)
		return container - content;
	// mid
	return (container - content) * 0.5f;
}

static void nsvg__scaleGradient(NSVGgradient* grad, float tx, float ty, float sx, float sy)
{
	float t[6];
	nsvg__xformSetTranslation(t, tx, ty);
	nsvg__xformMultiply (grad->xform, t);

	nsvg__xformSetScale(t, sx, sy);
	nsvg__xformMultiply (grad->xform, t);
}

static void nsvg__scaleToViewbox(NSVGparser* p, const char* units)
{
	NSVGshape* shape;
	NSVGpath* path;
	float tx, ty, sx, sy, us, bounds[4], t[6], avgs;
	int i;
	float* pt;

	// Guess image size if not set completely.
	nsvg__imageBounds(p, bounds);

	if (p->viewWidth == 0) {
		if (p->image->width > 0) {
			p->viewWidth = p->image->width;
		} else {
			p->viewMinx = bounds[0];
			p->viewWidth = bounds[2] - bounds[0];
		}
	}
	if (p->viewHeight == 0) {
		if (p->image->height > 0) {
			p->viewHeight = p->image->height;
		} else {
			p->viewMiny = bounds[1];
			p->viewHeight = bounds[3] - bounds[1];
		}
	}
	if (p->image->width == 0)
		p->image->width = p->viewWidth;
	if (p->image->height == 0)
		p->image->height = p->viewHeight;

	tx = -p->viewMinx;
	ty = -p->viewMiny;
	sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
	sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
	// Unit scaling
	us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);

	// Fix aspect ratio
	if (p->alignType == NSVG_ALIGN_MEET) {
		// fit whole image into viewbox
		sx = sy = nsvg__minf(sx, sy);
		tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
		ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
	} else if (p->alignType == NSVG_ALIGN_SLICE) {
		// fill whole viewbox with image
		sx = sy = nsvg__maxf(sx, sy);
		tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
		ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
	}

	// Transform
	sx *= us;
	sy *= us;
	avgs = (sx+sy) / 2.0f;
	for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
		shape->bounds[0] = (shape->bounds[0] + tx) * sx;
		shape->bounds[1] = (shape->bounds[1] + ty) * sy;
		shape->bounds[2] = (shape->bounds[2] + tx) * sx;
		shape->bounds[3] = (shape->bounds[3] + ty) * sy;
		for (path = shape->paths; path != NULL; path = path->next) {
			path->bounds[0] = (path->bounds[0] + tx) * sx;
			path->bounds[1] = (path->bounds[1] + ty) * sy;
			path->bounds[2] = (path->bounds[2] + tx) * sx;
			path->bounds[3] = (path->bounds[3] + ty) * sy;
			for (i =0; i < path->npts; i++) {
				pt = &path->pts[i*2];
				pt[0] = (pt[0] + tx) * sx;
				pt[1] = (pt[1] + ty) * sy;
			}
		}

		if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
			nsvg__scaleGradient(shape->fill.gradient, tx,ty, sx,sy);
			memcpy(t, shape->fill.gradient->xform, sizeof(float)*6);
			nsvg__xformInverse(shape->fill.gradient->xform, t);
		}
		if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
			nsvg__scaleGradient(shape->stroke.gradient, tx,ty, sx,sy);
			memcpy(t, shape->stroke.gradient->xform, sizeof(float)*6);
			nsvg__xformInverse(shape->stroke.gradient->xform, t);
		}

		shape->strokeWidth *= avgs;
		shape->strokeDashOffset *= avgs;
		for (i = 0; i < shape->strokeDashCount; i++)
			shape->strokeDashArray[i] *= avgs;
	}
}

NANOSVG_SCOPE
NSVGimage* nsvgParse(char* input, const char* units, float dpi)
{
	NSVGparser* p;
	NSVGimage* ret = 0;

	p = nsvg__createParser();
	if (p == NULL) {
		return NULL;
	}
	p->dpi = dpi;

	nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);

	// Scale to viewBox
	nsvg__scaleToViewbox(p, units);

	ret = p->image;
	p->image = NULL;

	nsvg__deleteParser(p);

	return ret;
}

NANOSVG_SCOPE
NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi)
{
	FILE* fp = NULL;
	size_t size;
	char* data = NULL;
	NSVGimage* image = NULL;

	fp = fopen(filename, "rb");
	if (!fp) goto error;
	fseek(fp, 0, SEEK_END);
	size = ftell(fp);
	fseek(fp, 0, SEEK_SET);
	data = (char*)NANOSVG_malloc(size+1);
	if (data == NULL) goto error;
	if (fread(data, 1, size, fp) != size) goto error;
	data[size] = '\0';	// Must be null terminated.
	fclose(fp);
	image = nsvgParse(data, units, dpi);
	NANOSVG_free(data);

	return image;

error:
	if (fp) fclose(fp);
	if (data) NANOSVG_free(data);
	if (image) nsvgDelete(image);
	return NULL;
}

NANOSVG_SCOPE
void nsvgDelete(NSVGimage* image)
{
	NSVGshape *snext, *shape;
	if (image == NULL) return;
	shape = image->shapes;
	while (shape != NULL) {
		snext = shape->next;
		nsvg__deletePaths(shape->paths);
		nsvg__deletePaint(&shape->fill);
		nsvg__deletePaint(&shape->stroke);
		NANOSVG_free(shape);
		shape = snext;
	}
	NANOSVG_free(image);
}

#endif

/*
 * Copyright (c) 2013-14 Mikko Mononen [email protected]
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * The polygon rasterization is heavily based on stb_truetype rasterizer
 * by Sean Barrett - http://nothings.org/
 *
 */

#ifndef NANOSVGRAST_H
#define NANOSVGRAST_H

#ifdef __cplusplus
extern "C" {
#endif

#ifndef NANOSVG_SCOPE
#define NANOSVG_SCOPE
#endif

#ifndef NANOSVG_malloc
#define NANOSVG_malloc malloc
#endif

#ifndef NANOSVG_realloc
#define NANOSVG_realloc realloc
#endif

#ifndef NANOSVG_free
#define NANOSVG_free free
#endif

typedef struct NSVGrasterizer NSVGrasterizer;

/* Example Usage:
	// Load SVG
	struct SNVGImage* image = nsvgParseFromFile("test.svg.");

	// Create rasterizer (can be used to render multiple images).
	struct NSVGrasterizer* rast = nsvgCreateRasterizer();
	// Allocate memory for image
	unsigned char* img = malloc(w*h*4);
	// Rasterize
	nsvgRasterize(rast, image, 0,0,1, img, w, h, w*4);
*/

// Allocated rasterizer context.
NANOSVG_SCOPE NSVGrasterizer* nsvgCreateRasterizer();

// Rasterizes SVG image, returns RGBA image (non-premultiplied alpha)
//   r - pointer to rasterizer context
//   image - pointer to image to rasterize
//   tx,ty - image offset (applied after scaling)
//   scale - image scale
//   dst - pointer to destination image data, 4 bytes per pixel (RGBA)
//   w - width of the image to render
//   h - height of the image to render
//   stride - number of bytes per scaleline in the destination buffer
NANOSVG_SCOPE void nsvgRasterize(NSVGrasterizer* r,
				   NSVGimage* image, float tx, float ty, float scale,
				   unsigned char* dst, int w, int h, int stride);

// Deletes rasterizer context.
NANOSVG_SCOPE void nsvgDeleteRasterizer(NSVGrasterizer*);


#ifdef __cplusplus
}
#endif

#endif // NANOSVGRAST_H

#ifdef NANOSVGRAST_IMPLEMENTATION

#include <math.h>

#define NSVG__SUBSAMPLES	5
#define NSVG__FIXSHIFT		10
#define NSVG__FIX			(1 << NSVG__FIXSHIFT)
#define NSVG__FIXMASK		(NSVG__FIX-1)
#define NSVG__MEMPAGE_SIZE	1024

typedef struct NSVGedge {
	float x0,y0, x1,y1;
	int dir;
	struct NSVGedge* next;
} NSVGedge;

typedef struct NSVGpoint {
	float x, y;
	float dx, dy;
	float len;
	float dmx, dmy;
	unsigned char flags;
} NSVGpoint;

typedef struct NSVGactiveEdge {
	int x,dx;
	float ey;
	int dir;
	struct NSVGactiveEdge *next;
} NSVGactiveEdge;

typedef struct NSVGmemPage {
	unsigned char mem[NSVG__MEMPAGE_SIZE];
	int size;
	struct NSVGmemPage* next;
} NSVGmemPage;

typedef struct NSVGcachedPaint {
	char type;
	char spread;
	float xform[6];
	unsigned int colors[256];
} NSVGcachedPaint;

struct NSVGrasterizer
{
	float px, py;

	float tessTol;
	float distTol;

	NSVGedge* edges;
	int nedges;
	int cedges;

	NSVGpoint* points;
	int npoints;
	int cpoints;

	NSVGpoint* points2;
	int npoints2;
	int cpoints2;

	NSVGactiveEdge* freelist;
	NSVGmemPage* pages;
	NSVGmemPage* curpage;

	unsigned char* scanline;
	int cscanline;

	unsigned char* bitmap;
	int width, height, stride;
};

NANOSVG_SCOPE
NSVGrasterizer* nsvgCreateRasterizer()
{
	NSVGrasterizer* r = (NSVGrasterizer*)NANOSVG_malloc(sizeof(NSVGrasterizer));
	if (r == NULL) goto error;
	memset(r, 0, sizeof(NSVGrasterizer));

	r->tessTol = 0.25f;
	r->distTol = 0.01f;

	return r;

error:
	nsvgDeleteRasterizer(r);
	return NULL;
}

NANOSVG_SCOPE
void nsvgDeleteRasterizer(NSVGrasterizer* r)
{
	NSVGmemPage* p;

	if (r == NULL) return;

	p = r->pages;
	while (p != NULL) {
		NSVGmemPage* next = p->next;
		NANOSVG_free(p);
		p = next;
	}

	if (r->edges) NANOSVG_free(r->edges);
	if (r->points) NANOSVG_free(r->points);
	if (r->points2) NANOSVG_free(r->points2);
	if (r->scanline) NANOSVG_free(r->scanline);

	NANOSVG_free(r);
}

static NSVGmemPage* nsvg__nextPage(NSVGrasterizer* r, NSVGmemPage* cur)
{
	NSVGmemPage *newp;

	// If using existing chain, return the next page in chain
	if (cur != NULL && cur->next != NULL) {
		return cur->next;
	}

	// Alloc new page
	newp = (NSVGmemPage*)NANOSVG_malloc(sizeof(NSVGmemPage));
	if (newp == NULL) return NULL;
	memset(newp, 0, sizeof(NSVGmemPage));

	// Add to linked list
	if (cur != NULL)
		cur->next = newp;
	else
		r->pages = newp;

	return newp;
}

static void nsvg__resetPool(NSVGrasterizer* r)
{
	NSVGmemPage* p = r->pages;
	while (p != NULL) {
		p->size = 0;
		p = p->next;
	}
	r->curpage = r->pages;
}

static unsigned char* nsvg__alloc(NSVGrasterizer* r, int size)
{
	unsigned char* buf;
	if (size > NSVG__MEMPAGE_SIZE) return NULL;
	if (r->curpage == NULL || r->curpage->size+size > NSVG__MEMPAGE_SIZE) {
		r->curpage = nsvg__nextPage(r, r->curpage);
	}
	buf = &r->curpage->mem[r->curpage->size];
	r->curpage->size += size;
	return buf;
}

static int nsvg__ptEquals(float x1, float y1, float x2, float y2, float tol)
{
	float dx = x2 - x1;
	float dy = y2 - y1;
	return dx*dx + dy*dy < tol*tol;
}

static void nsvg__addPathPoint(NSVGrasterizer* r, float x, float y, int flags)
{
	NSVGpoint* pt;

	if (r->npoints > 0) {
		pt = &r->points[r->npoints-1];
		if (nsvg__ptEquals(pt->x,pt->y, x,y, r->distTol)) {
			pt->flags = (unsigned char)(pt->flags | flags);
			return;
		}
	}

	if (r->npoints+1 > r->cpoints) {
		r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
		r->points = (NSVGpoint*)NANOSVG_realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
		if (r->points == NULL) return;
	}

	pt = &r->points[r->npoints];
	pt->x = x;
	pt->y = y;
	pt->flags = (unsigned char)flags;
	r->npoints++;
}

static void nsvg__appendPathPoint(NSVGrasterizer* r, NSVGpoint pt)
{
	if (r->npoints+1 > r->cpoints) {
		r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
		r->points = (NSVGpoint*)NANOSVG_realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
		if (r->points == NULL) return;
	}
	r->points[r->npoints] = pt;
	r->npoints++;
}

static void nsvg__duplicatePoints(NSVGrasterizer* r)
{
	if (r->npoints > r->cpoints2) {
		r->cpoints2 = r->npoints;
		r->points2 = (NSVGpoint*)NANOSVG_realloc(r->points2, sizeof(NSVGpoint) * r->cpoints2);
		if (r->points2 == NULL) return;
	}

	memcpy(r->points2, r->points, sizeof(NSVGpoint) * r->npoints);
	r->npoints2 = r->npoints;
}

static void nsvg__addEdge(NSVGrasterizer* r, float x0, float y0, float x1, float y1)
{
	NSVGedge* e;

	// Skip horizontal edges
	if (y0 == y1)
		return;

	if (r->nedges+1 > r->cedges) {
		r->cedges = r->cedges > 0 ? r->cedges * 2 : 64;
		r->edges = (NSVGedge*)NANOSVG_realloc(r->edges, sizeof(NSVGedge) * r->cedges);
		if (r->edges == NULL) return;
	}

	e = &r->edges[r->nedges];
	r->nedges++;

	if (y0 < y1) {
		e->x0 = x0;
		e->y0 = y0;
		e->x1 = x1;
		e->y1 = y1;
		e->dir = 1;
	} else {
		e->x0 = x1;
		e->y0 = y1;
		e->x1 = x0;
		e->y1 = y0;
		e->dir = -1;
	}
}

static float nsvg__normalize(float *x, float* y)
{
	float d = sqrtf((*x)*(*x) + (*y)*(*y));
	if (d > 1e-6f) {
		float id = 1.0f / d;
		*x *= id;
		*y *= id;
	}
	return d;
}

static float nsvg__absf(float x) { return x < 0 ? -x : x; }

static void nsvg__flattenCubicBez(NSVGrasterizer* r,
								  float x1, float y1, float x2, float y2,
								  float x3, float y3, float x4, float y4,
								  int level, int type)
{
	float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234;
	float dx,dy,d2,d3;

	if (level > 10) return;

	x12 = (x1+x2)*0.5f;
	y12 = (y1+y2)*0.5f;
	x23 = (x2+x3)*0.5f;
	y23 = (y2+y3)*0.5f;
	x34 = (x3+x4)*0.5f;
	y34 = (y3+y4)*0.5f;
	x123 = (x12+x23)*0.5f;
	y123 = (y12+y23)*0.5f;

	dx = x4 - x1;
	dy = y4 - y1;
	d2 = nsvg__absf(((x2 - x4) * dy - (y2 - y4) * dx));
	d3 = nsvg__absf(((x3 - x4) * dy - (y3 - y4) * dx));

	if ((d2 + d3)*(d2 + d3) < r->tessTol * (dx*dx + dy*dy)) {
		nsvg__addPathPoint(r, x4, y4, type);
		return;
	}

	x234 = (x23+x34)*0.5f;
	y234 = (y23+y34)*0.5f;
	x1234 = (x123+x234)*0.5f;
	y1234 = (y123+y234)*0.5f;

	nsvg__flattenCubicBez(r, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0);
	nsvg__flattenCubicBez(r, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type);
}

static void nsvg__flattenShape(NSVGrasterizer* r, NSVGshape* shape, float scale)
{
	int i, j;
	NSVGpath* path;

	for (path = shape->paths; path != NULL; path = path->next) {
		r->npoints = 0;
		// Flatten path
		nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
		for (i = 0; i < path->npts-1; i += 3) {
			float* p = &path->pts[i*2];
			nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, 0);
		}
		// Close path
		nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
		// Build edges
		for (i = 0, j = r->npoints-1; i < r->npoints; j = i++)
			nsvg__addEdge(r, r->points[j].x, r->points[j].y, r->points[i].x, r->points[i].y);
	}
}

enum NSVGpointFlags
{
	NSVG_PT_CORNER = 0x01,
	NSVG_PT_BEVEL = 0x02,
	NSVG_PT_LEFT = 0x04
};

static void nsvg__initClosed(NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
{
	float w = lineWidth * 0.5f;
	float dx = p1->x - p0->x;
	float dy = p1->y - p0->y;
	float len = nsvg__normalize(&dx, &dy);
	float px = p0->x + dx*len*0.5f, py = p0->y + dy*len*0.5f;
	float dlx = dy, dly = -dx;
	float lx = px - dlx*w, ly = py - dly*w;
	float rx = px + dlx*w, ry = py + dly*w;
	left->x = lx; left->y = ly;
	right->x = rx; right->y = ry;
}

static void nsvg__buttCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
{
	float w = lineWidth * 0.5f;
	float px = p->x, py = p->y;
	float dlx = dy, dly = -dx;
	float lx = px - dlx*w, ly = py - dly*w;
	float rx = px + dlx*w, ry = py + dly*w;

	nsvg__addEdge(r, lx, ly, rx, ry);

	if (connect) {
		nsvg__addEdge(r, left->x, left->y, lx, ly);
		nsvg__addEdge(r, rx, ry, right->x, right->y);
	}
	left->x = lx; left->y = ly;
	right->x = rx; right->y = ry;
}

static void nsvg__squareCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
{
	float w = lineWidth * 0.5f;
	float px = p->x - dx*w, py = p->y - dy*w;
	float dlx = dy, dly = -dx;
	float lx = px - dlx*w, ly = py - dly*w;
	float rx = px + dlx*w, ry = py + dly*w;

	nsvg__addEdge(r, lx, ly, rx, ry);

	if (connect) {
		nsvg__addEdge(r, left->x, left->y, lx, ly);
		nsvg__addEdge(r, rx, ry, right->x, right->y);
	}
	left->x = lx; left->y = ly;
	right->x = rx; right->y = ry;
}

#ifndef NSVG_PI
#define NSVG_PI (3.14159265358979323846264338327f)
#endif

static void nsvg__roundCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int ncap, int connect)
{
	int i;
	float w = lineWidth * 0.5f;
	float px = p->x, py = p->y;
	float dlx = dy, dly = -dx;
	float lx = 0, ly = 0, rx = 0, ry = 0, prevx = 0, prevy = 0;

	for (i = 0; i < ncap; i++) {
		float a = (float)i/(float)(ncap-1)*NSVG_PI;
		float ax = cosf(a) * w, ay = sinf(a) * w;
		float x = px - dlx*ax - dx*ay;
		float y = py - dly*ax - dy*ay;

		if (i > 0)
			nsvg__addEdge(r, prevx, prevy, x, y);

		prevx = x;
		prevy = y;

		if (i == 0) {
			lx = x; ly = y;
		} else if (i == ncap-1) {
			rx = x; ry = y;
		}
	}

	if (connect) {
		nsvg__addEdge(r, left->x, left->y, lx, ly);
		nsvg__addEdge(r, rx, ry, right->x, right->y);
	}

	left->x = lx; left->y = ly;
	right->x = rx; right->y = ry;
}

static void nsvg__bevelJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
{
	float w = lineWidth * 0.5f;
	float dlx0 = p0->dy, dly0 = -p0->dx;
	float dlx1 = p1->dy, dly1 = -p1->dx;
	float lx0 = p1->x - (dlx0 * w), ly0 = p1->y - (dly0 * w);
	float rx0 = p1->x + (dlx0 * w), ry0 = p1->y + (dly0 * w);
	float lx1 = p1->x - (dlx1 * w), ly1 = p1->y - (dly1 * w);
	float rx1 = p1->x + (dlx1 * w), ry1 = p1->y + (dly1 * w);

	nsvg__addEdge(r, lx0, ly0, left->x, left->y);
	nsvg__addEdge(r, lx1, ly1, lx0, ly0);

	nsvg__addEdge(r, right->x, right->y, rx0, ry0);
	nsvg__addEdge(r, rx0, ry0, rx1, ry1);

	left->x = lx1; left->y = ly1;
	right->x = rx1; right->y = ry1;
}

static void nsvg__miterJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
{
	float w = lineWidth * 0.5f;
	float dlx0 = p0->dy, dly0 = -p0->dx;
	float dlx1 = p1->dy, dly1 = -p1->dx;
	float lx0, rx0, lx1, rx1;
	float ly0, ry0, ly1, ry1;

	if (p1->flags & NSVG_PT_LEFT) {
		lx0 = lx1 = p1->x - p1->dmx * w;
		ly0 = ly1 = p1->y - p1->dmy * w;
		nsvg__addEdge(r, lx1, ly1, left->x, left->y);

		rx0 = p1->x + (dlx0 * w);
		ry0 = p1->y + (dly0 * w);
		rx1 = p1->x + (dlx1 * w);
		ry1 = p1->y + (dly1 * w);
		nsvg__addEdge(r, right->x, right->y, rx0, ry0);
		nsvg__addEdge(r, rx0, ry0, rx1, ry1);
	} else {
		lx0 = p1->x - (dlx0 * w);
		ly0 = p1->y - (dly0 * w);
		lx1 = p1->x - (dlx1 * w);
		ly1 = p1->y - (dly1 * w);
		nsvg__addEdge(r, lx0, ly0, left->x, left->y);
		nsvg__addEdge(r, lx1, ly1, lx0, ly0);

		rx0 = rx1 = p1->x + p1->dmx * w;
		ry0 = ry1 = p1->y + p1->dmy * w;
		nsvg__addEdge(r, right->x, right->y, rx1, ry1);
	}

	left->x = lx1; left->y = ly1;
	right->x = rx1; right->y = ry1;
}

static void nsvg__roundJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth, int ncap)
{
	int i, n;
	float w = lineWidth * 0.5f;
	float dlx0 = p0->dy, dly0 = -p0->dx;
	float dlx1 = p1->dy, dly1 = -p1->dx;
	float a0 = atan2f(dly0, dlx0);
	float a1 = atan2f(dly1, dlx1);
	float da = a1 - a0;
	float lx, ly, rx, ry;

	if (da < NSVG_PI) da += NSVG_PI*2;
	if (da > NSVG_PI) da -= NSVG_PI*2;

	n = (int)ceilf((nsvg__absf(da) / NSVG_PI) * (float)ncap);
	if (n < 2) n = 2;
	if (n > ncap) n = ncap;

	lx = left->x;
	ly = left->y;
	rx = right->x;
	ry = right->y;

	for (i = 0; i < n; i++) {
		float u = (float)i/(float)(n-1);
		float a = a0 + u*da;
		float ax = cosf(a) * w, ay = sinf(a) * w;
		float lx1 = p1->x - ax, ly1 = p1->y - ay;
		float rx1 = p1->x + ax, ry1 = p1->y + ay;

		nsvg__addEdge(r, lx1, ly1, lx, ly);
		nsvg__addEdge(r, rx, ry, rx1, ry1);

		lx = lx1; ly = ly1;
		rx = rx1; ry = ry1;
	}

	left->x = lx; left->y = ly;
	right->x = rx; right->y = ry;
}

static void nsvg__straightJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p1, float lineWidth)
{
	float w = lineWidth * 0.5f;
	float lx = p1->x - (p1->dmx * w), ly = p1->y - (p1->dmy * w);
	float rx = p1->x + (p1->dmx * w), ry = p1->y + (p1->dmy * w);

	nsvg__addEdge(r, lx, ly, left->x, left->y);
	nsvg__addEdge(r, right->x, right->y, rx, ry);

	left->x = lx; left->y = ly;
	right->x = rx; right->y = ry;
}

static int nsvg__curveDivs(float r, float arc, float tol)
{
	float da = acosf(r / (r + tol)) * 2.0f;
	int divs = (int)ceilf(arc / da);
	if (divs < 2) divs = 2;
	return divs;
}

static void nsvg__expandStroke(NSVGrasterizer* r, NSVGpoint* points, int npoints, int closed, int lineJoin, int lineCap, float lineWidth)
{
	int ncap = nsvg__curveDivs(lineWidth*0.5f, NSVG_PI, r->tessTol);	// Calculate divisions per half circle.
	NSVGpoint left = {0,0,0,0,0,0,0,0}, right = {0,0,0,0,0,0,0,0}, firstLeft = {0,0,0,0,0,0,0,0}, firstRight = {0,0,0,0,0,0,0,0};
	NSVGpoint* p0, *p1;
	int j, s, e;

	// Build stroke edges
	if (closed) {
		// Looping
		p0 = &points[npoints-1];
		p1 = &points[0];
		s = 0;
		e = npoints;
	} else {
		// Add cap
		p0 = &points[0];
		p1 = &points[1];
		s = 1;
		e = npoints-1;
	}

	if (closed) {
		nsvg__initClosed(&left, &right, p0, p1, lineWidth);
		firstLeft = left;
		firstRight = right;
	} else {
		// Add cap
		float dx = p1->x - p0->x;
		float dy = p1->y - p0->y;
		nsvg__normalize(&dx, &dy);
		if (lineCap == NSVG_CAP_BUTT)
			nsvg__buttCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
		else if (lineCap == NSVG_CAP_SQUARE)
			nsvg__squareCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
		else if (lineCap == NSVG_CAP_ROUND)
			nsvg__roundCap(r, &left, &right, p0, dx, dy, lineWidth, ncap, 0);
	}

	for (j = s; j < e; ++j) {
		if (p1->flags & NSVG_PT_CORNER) {
			if (lineJoin == NSVG_JOIN_ROUND)
				nsvg__roundJoin(r, &left, &right, p0, p1, lineWidth, ncap);
			else if (lineJoin == NSVG_JOIN_BEVEL || (p1->flags & NSVG_PT_BEVEL))
				nsvg__bevelJoin(r, &left, &right, p0, p1, lineWidth);
			else
				nsvg__miterJoin(r, &left, &right, p0, p1, lineWidth);
		} else {
			nsvg__straightJoin(r, &left, &right, p1, lineWidth);
		}
		p0 = p1++;
	}

	if (closed) {
		// Loop it
		nsvg__addEdge(r, firstLeft.x, firstLeft.y, left.x, left.y);
		nsvg__addEdge(r, right.x, right.y, firstRight.x, firstRight.y);
	} else {
		// Add cap
		float dx = p1->x - p0->x;
		float dy = p1->y - p0->y;
		nsvg__normalize(&dx, &dy);
		if (lineCap == NSVG_CAP_BUTT)
			nsvg__buttCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
		else if (lineCap == NSVG_CAP_SQUARE)
			nsvg__squareCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
		else if (lineCap == NSVG_CAP_ROUND)
			nsvg__roundCap(r, &right, &left, p1, -dx, -dy, lineWidth, ncap, 1);
	}
}

static void nsvg__prepareStroke(NSVGrasterizer* r, float miterLimit, int lineJoin)
{
	int i, j;
	NSVGpoint* p0, *p1;

	p0 = &r->points[r->npoints-1];
	p1 = &r->points[0];
	for (i = 0; i < r->npoints; i++) {
		// Calculate segment direction and length
		p0->dx = p1->x - p0->x;
		p0->dy = p1->y - p0->y;
		p0->len = nsvg__normalize(&p0->dx, &p0->dy);
		// Advance
		p0 = p1++;
	}

	// calculate joins
	p0 = &r->points[r->npoints-1];
	p1 = &r->points[0];
	for (j = 0; j < r->npoints; j++) {
		float dlx0, dly0, dlx1, dly1, dmr2, cross;
		dlx0 = p0->dy;
		dly0 = -p0->dx;
		dlx1 = p1->dy;
		dly1 = -p1->dx;
		// Calculate extrusions
		p1->dmx = (dlx0 + dlx1) * 0.5f;
		p1->dmy = (dly0 + dly1) * 0.5f;
		dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy;
		if (dmr2 > 0.000001f) {
			float s2 = 1.0f / dmr2;
			if (s2 > 600.0f) {
				s2 = 600.0f;
			}
			p1->dmx *= s2;
			p1->dmy *= s2;
		}

		// Clear flags, but keep the corner.
		p1->flags = (p1->flags & NSVG_PT_CORNER) ? NSVG_PT_CORNER : 0;

		// Keep track of left turns.
		cross = p1->dx * p0->dy - p0->dx * p1->dy;
		if (cross > 0.0f)
			p1->flags |= NSVG_PT_LEFT;

		// Check to see if the corner needs to be beveled.
		if (p1->flags & NSVG_PT_CORNER) {
			if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NSVG_JOIN_BEVEL || lineJoin == NSVG_JOIN_ROUND) {
				p1->flags |= NSVG_PT_BEVEL;
			}
		}

		p0 = p1++;
	}
}

static void nsvg__flattenShapeStroke(NSVGrasterizer* r, NSVGshape* shape, float scale)
{
	int i, j, closed;
	NSVGpath* path;
	NSVGpoint* p0, *p1;
	float miterLimit = shape->miterLimit;
	int lineJoin = shape->strokeLineJoin;
	int lineCap = shape->strokeLineCap;
	float lineWidth = shape->strokeWidth * scale;

	for (path = shape->paths; path != NULL; path = path->next) {
		// Flatten path
		r->npoints = 0;
		nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, NSVG_PT_CORNER);
		for (i = 0; i < path->npts-1; i += 3) {
			float* p = &path->pts[i*2];
			nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, NSVG_PT_CORNER);
		}
		if (r->npoints < 2)
			continue;

		closed = path->closed;

		// If the first and last points are the same, remove the last, mark as closed path.
		p0 = &r->points[r->npoints-1];
		p1 = &r->points[0];
		if (nsvg__ptEquals(p0->x,p0->y, p1->x,p1->y, r->distTol)) {
			r->npoints--;
			p0 = &r->points[r->npoints-1];
			closed = 1;
		}

		if (shape->strokeDashCount > 0) {
			int idash = 0, dashState = 1;
			float totalDist = 0, dashLen, allDashLen, dashOffset;
			NSVGpoint cur;

			if (closed)
				nsvg__appendPathPoint(r, r->points[0]);

			// Duplicate points -> points2.
			nsvg__duplicatePoints(r);

			r->npoints = 0;
 			cur = r->points2[0];
			nsvg__appendPathPoint(r, cur);

			// Figure out dash offset.
			allDashLen = 0;
			for (j = 0; j < shape->strokeDashCount; j++)
				allDashLen += shape->strokeDashArray[j];
			if (shape->strokeDashCount & 1)
				allDashLen *= 2.0f;
			// Find location inside pattern
			dashOffset = fmodf(shape->strokeDashOffset, allDashLen);
			if (dashOffset < 0.0f)
				dashOffset += allDashLen;

			while (dashOffset > shape->strokeDashArray[idash]) {
				dashOffset -= shape->strokeDashArray[idash];
				idash = (idash + 1) % shape->strokeDashCount;
			}
			dashLen = (shape->strokeDashArray[idash] - dashOffset) * scale;

			for (j = 1; j < r->npoints2; ) {
				float dx = r->points2[j].x - cur.x;
				float dy = r->points2[j].y - cur.y;
				float dist = sqrtf(dx*dx + dy*dy);

				if ((totalDist + dist) > dashLen) {
					// Calculate intermediate point
					float d = (dashLen - totalDist) / dist;
					float x = cur.x + dx * d;
					float y = cur.y + dy * d;
					nsvg__addPathPoint(r, x, y, NSVG_PT_CORNER);

					// Stroke
					if (r->npoints > 1 && dashState) {
						nsvg__prepareStroke(r, miterLimit, lineJoin);
						nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
					}
					// Advance dash pattern
					dashState = !dashState;
					idash = (idash+1) % shape->strokeDashCount;
					dashLen = shape->strokeDashArray[idash] * scale;
					// Restart
					cur.x = x;
					cur.y = y;
					cur.flags = NSVG_PT_CORNER;
					totalDist = 0.0f;
					r->npoints = 0;
					nsvg__appendPathPoint(r, cur);
				} else {
					totalDist += dist;
					cur = r->points2[j];
					nsvg__appendPathPoint(r, cur);
					j++;
				}
			}
			// Stroke any leftover path
			if (r->npoints > 1 && dashState)
				nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
		} else {
			nsvg__prepareStroke(r, miterLimit, lineJoin);
			nsvg__expandStroke(r, r->points, r->npoints, closed, lineJoin, lineCap, lineWidth);
		}
	}
}

static int nsvg__cmpEdge(const void *p, const void *q)
{
	const NSVGedge* a = (const NSVGedge*)p;
	const NSVGedge* b = (const NSVGedge*)q;

	if (a->y0 < b->y0) return -1;
	if (a->y0 > b->y0) return  1;
	return 0;
}


static NSVGactiveEdge* nsvg__addActive(NSVGrasterizer* r, NSVGedge* e, float startPoint)
{
	 NSVGactiveEdge* z;
	float dxdy;

	if (r->freelist != NULL) {
		// Restore from freelist.
		z = r->freelist;
		r->freelist = z->next;
	} else {
		// Alloc new edge.
		z = (NSVGactiveEdge*)nsvg__alloc(r, sizeof(NSVGactiveEdge));
		if (z == NULL) return NULL;
	}

	dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
//	STBTT_assert(e->y0 <= start_point);
	// round dx down to avoid going too far
	if (dxdy < 0)
		z->dx = (int)(-floorf(NSVG__FIX * -dxdy));
	else
		z->dx = (int)floorf(NSVG__FIX * dxdy);
	z->x = (int)floorf(NSVG__FIX * (e->x0 + dxdy * (startPoint - e->y0)));
//	z->x -= off_x * FIX;
	z->ey = e->y1;
	z->next = 0;
	z->dir = e->dir;

	return z;
}

static void nsvg__freeActive(NSVGrasterizer* r, NSVGactiveEdge* z)
{
	z->next = r->freelist;
	r->freelist = z;
}

static void nsvg__fillScanline(unsigned char* scanline, int len, int x0, int x1, int maxWeight, int* xmin, int* xmax)
{
	int i = x0 >> NSVG__FIXSHIFT;
	int j = x1 >> NSVG__FIXSHIFT;
	if (i < *xmin) *xmin = i;
	if (j > *xmax) *xmax = j;
	if (i < len && j >= 0) {
		if (i == j) {
			// x0,x1 are the same pixel, so compute combined coverage
			scanline[i] = (unsigned char)(scanline[i] + ((x1 - x0) * maxWeight >> NSVG__FIXSHIFT));
		} else {
			if (i >= 0) // add antialiasing for x0
				scanline[i] = (unsigned char)(scanline[i] + (((NSVG__FIX - (x0 & NSVG__FIXMASK)) * maxWeight) >> NSVG__FIXSHIFT));
			else
				i = -1; // clip

			if (j < len) // add antialiasing for x1
				scanline[j] = (unsigned char)(scanline[j] + (((x1 & NSVG__FIXMASK) * maxWeight) >> NSVG__FIXSHIFT));
			else
				j = len; // clip

			for (++i; i < j; ++i) // fill pixels between x0 and x1
				scanline[i] = (unsigned char)(scanline[i] + maxWeight);
		}
	}
}

// note: this routine clips fills that extend off the edges... ideally this
// wouldn't happen, but it could happen if the truetype glyph bounding boxes
// are wrong, or if the user supplies a too-small bitmap
static void nsvg__fillActiveEdges(unsigned char* scanline, int len, NSVGactiveEdge* e, int maxWeight, int* xmin, int* xmax, char fillRule)
{
	// non-zero winding fill
	int x0 = 0, w = 0;

	if (fillRule == NSVG_FILLRULE_NONZERO) {
		// Non-zero
		while (e != NULL) {
			if (w == 0) {
				// if we're currently at zero, we need to record the edge start point
				x0 = e->x; w += e->dir;
			} else {
				int x1 = e->x; w += e->dir;
				// if we went to zero, we need to draw
				if (w == 0)
					nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
			}
			e = e->next;
		}
	} else if (fillRule == NSVG_FILLRULE_EVENODD) {
		// Even-odd
		while (e != NULL) {
			if (w == 0) {
				// if we're currently at zero, we need to record the edge start point
				x0 = e->x; w = 1;
			} else {
				int x1 = e->x; w = 0;
				nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
			}
			e = e->next;
		}
	}
}

static float nsvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); }

static unsigned int nsvg__RGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
	return (r) | (g << 8) | (b << 16) | (a << 24);
}

static unsigned int nsvg__lerpRGBA(unsigned int c0, unsigned int c1, float u)
{
	int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
	int r = (((c0) & 0xff)*(256-iu) + (((c1) & 0xff)*iu)) >> 8;
	int g = (((c0>>8) & 0xff)*(256-iu) + (((c1>>8) & 0xff)*iu)) >> 8;
	int b = (((c0>>16) & 0xff)*(256-iu) + (((c1>>16) & 0xff)*iu)) >> 8;
	int a = (((c0>>24) & 0xff)*(256-iu) + (((c1>>24) & 0xff)*iu)) >> 8;
	return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
}

static unsigned int nsvg__applyOpacity(unsigned int c, float u)
{
	int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
	int r = (c) & 0xff;
	int g = (c>>8) & 0xff;
	int b = (c>>16) & 0xff;
	int a = (((c>>24) & 0xff)*iu) >> 8;
	return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
}

static inline int nsvg__div255(int x)
{
    return ((x+1) * 257) >> 16;
}

static void nsvg__scanlineSolid(unsigned char* dst, int count, unsigned char* cover, int x, int y,
								float tx, float ty, float scale, NSVGcachedPaint* cache)
{

	if (cache->type == NSVG_PAINT_COLOR) {
		int i, cr, cg, cb, ca;
		cr = cache->colors[0] & 0xff;
		cg = (cache->colors[0] >> 8) & 0xff;
		cb = (cache->colors[0] >> 16) & 0xff;
		ca = (cache->colors[0] >> 24) & 0xff;

		for (i = 0; i < count; i++) {
			int r,g,b;
			int a = nsvg__div255((int)cover[0] * ca);
			int ia = 255 - a;
			// Premultiply
			r = nsvg__div255(cr * a);
			g = nsvg__div255(cg * a);
			b = nsvg__div255(cb * a);

			// Blend over
			r += nsvg__div255(ia * (int)dst[0]);
			g += nsvg__div255(ia * (int)dst[1]);
			b += nsvg__div255(ia * (int)dst[2]);
			a += nsvg__div255(ia * (int)dst[3]);

			dst[0] = (unsigned char)r;
			dst[1] = (unsigned char)g;
			dst[2] = (unsigned char)b;
			dst[3] = (unsigned char)a;

			cover++;
			dst += 4;
		}
	} else if (cache->type == NSVG_PAINT_LINEAR_GRADIENT) {
		// TODO: spread modes.
		// TODO: plenty of opportunities to optimize.
		float fx, fy, dx, gy;
		float* t = cache->xform;
		int i, cr, cg, cb, ca;
		unsigned int c;

		fx = ((float)x - tx) / scale;
		fy = ((float)y - ty) / scale;
		dx = 1.0f / scale;

		for (i = 0; i < count; i++) {
			int r,g,b,a,ia;
			gy = fx*t[1] + fy*t[3] + t[5];
			c = cache->colors[(int)nsvg__clampf(gy*255.0f, 0, 255.0f)];
			cr = (c) & 0xff;
			cg = (c >> 8) & 0xff;
			cb = (c >> 16) & 0xff;
			ca = (c >> 24) & 0xff;

			a = nsvg__div255((int)cover[0] * ca);
			ia = 255 - a;

			// Premultiply
			r = nsvg__div255(cr * a);
			g = nsvg__div255(cg * a);
			b = nsvg__div255(cb * a);

			// Blend over
			r += nsvg__div255(ia * (int)dst[0]);
			g += nsvg__div255(ia * (int)dst[1]);
			b += nsvg__div255(ia * (int)dst[2]);
			a += nsvg__div255(ia * (int)dst[3]);

			dst[0] = (unsigned char)r;
			dst[1] = (unsigned char)g;
			dst[2] = (unsigned char)b;
			dst[3] = (unsigned char)a;

			cover++;
			dst += 4;
			fx += dx;
		}
	} else if (cache->type == NSVG_PAINT_RADIAL_GRADIENT) {
		// TODO: spread modes.
		// TODO: plenty of opportunities to optimize.
		// TODO: focus (fx,fy)
		float fx, fy, dx, gx, gy, gd;
		float* t = cache->xform;
		int i, cr, cg, cb, ca;
		unsigned int c;

		fx = ((float)x - tx) / scale;
		fy = ((float)y - ty) / scale;
		dx = 1.0f / scale;

		for (i = 0; i < count; i++) {
			int r,g,b,a,ia;
			gx = fx*t[0] + fy*t[2] + t[4];
			gy = fx*t[1] + fy*t[3] + t[5];
			gd = sqrtf(gx*gx + gy*gy);
			c = cache->colors[(int)nsvg__clampf(gd*255.0f, 0, 255.0f)];
			cr = (c) & 0xff;
			cg = (c >> 8) & 0xff;
			cb = (c >> 16) & 0xff;
			ca = (c >> 24) & 0xff;

			a = nsvg__div255((int)cover[0] * ca);
			ia = 255 - a;

			// Premultiply
			r = nsvg__div255(cr * a);
			g = nsvg__div255(cg * a);
			b = nsvg__div255(cb * a);

			// Blend over
			r += nsvg__div255(ia * (int)dst[0]);
			g += nsvg__div255(ia * (int)dst[1]);
			b += nsvg__div255(ia * (int)dst[2]);
			a += nsvg__div255(ia * (int)dst[3]);

			dst[0] = (unsigned char)r;
			dst[1] = (unsigned char)g;
			dst[2] = (unsigned char)b;
			dst[3] = (unsigned char)a;

			cover++;
			dst += 4;
			fx += dx;
		}
	}
}

static void nsvg__rasterizeSortedEdges(NSVGrasterizer *r, float tx, float ty, float scale, NSVGcachedPaint* cache, char fillRule)
{
	NSVGactiveEdge *active = NULL;
	int y, s;
	int e = 0;
	int maxWeight = (255 / NSVG__SUBSAMPLES);  // weight per vertical scanline
	int xmin, xmax;

	for (y = 0; y < r->height; y++) {
		memset(r->scanline, 0, r->width);
		xmin = r->width;
		xmax = 0;
		for (s = 0; s < NSVG__SUBSAMPLES; ++s) {
			// find center of pixel for this scanline
			float scany = (float)(y*NSVG__SUBSAMPLES + s) + 0.5f;
			NSVGactiveEdge **step = &active;

			// update all active edges;
			// remove all active edges that terminate before the center of this scanline
			while (*step) {
				NSVGactiveEdge *z = *step;
				if (z->ey <= scany) {
					*step = z->next; // delete from list
//					NSVG__assert(z->valid);
					nsvg__freeActive(r, z);
				} else {
					z->x += z->dx; // advance to position for current scanline
					step = &((*step)->next); // advance through list
				}
			}

			// resort the list if needed
			for (;;) {
				int changed = 0;
				step = &active;
				while (*step && (*step)->next) {
					if ((*step)->x > (*step)->next->x) {
						NSVGactiveEdge* t = *step;
						NSVGactiveEdge* q = t->next;
						t->next = q->next;
						q->next = t;
						*step = q;
						changed = 1;
					}
					step = &(*step)->next;
				}
				if (!changed) break;
			}

			// insert all edges that start before the center of this scanline -- omit ones that also end on this scanline
			while (e < r->nedges && r->edges[e].y0 <= scany) {
				if (r->edges[e].y1 > scany) {
					NSVGactiveEdge* z = nsvg__addActive(r, &r->edges[e], scany);
					if (z == NULL) break;
					// find insertion point
					if (active == NULL) {
						active = z;
					} else if (z->x < active->x) {
						// insert at front
						z->next = active;
						active = z;
					} else {
						// find thing to insert AFTER
						NSVGactiveEdge* p = active;
						while (p->next && p->next->x < z->x)
							p = p->next;
						// at this point, p->next->x is NOT < z->x
						z->next = p->next;
						p->next = z;
					}
				}
				e++;
			}

			// now process all active edges in non-zero fashion
			if (active != NULL)
				nsvg__fillActiveEdges(r->scanline, r->width, active, maxWeight, &xmin, &xmax, fillRule);
		}
		// Blit
		if (xmin < 0) xmin = 0;
		if (xmax > r->width-1) xmax = r->width-1;
		if (xmin <= xmax) {
			nsvg__scanlineSolid(&r->bitmap[y * r->stride] + xmin*4, xmax-xmin+1, &r->scanline[xmin], xmin, y, tx,ty, scale, cache);
		}
	}

}

static void nsvg__unpremultiplyAlpha(unsigned char* image, int w, int h, int stride)
{
	int x,y;

	// Unpremultiply
	for (y = 0; y < h; y++) {
		unsigned char *row = &image[y*stride];
		for (x = 0; x < w; x++) {
			int r = row[0], g = row[1], b = row[2], a = row[3];
			if (a != 0) {
				row[0] = (unsigned char)(r*255/a);
				row[1] = (unsigned char)(g*255/a);
				row[2] = (unsigned char)(b*255/a);
			}
			row += 4;
		}
	}

	// Defringe
	for (y = 0; y < h; y++) {
		unsigned char *row = &image[y*stride];
		for (x = 0; x < w; x++) {
			int r = 0, g = 0, b = 0, a = row[3], n = 0;
			if (a == 0) {
				if (x-1 > 0 && row[-1] != 0) {
					r += row[-4];
					g += row[-3];
					b += row[-2];
					n++;
				}
				if (x+1 < w && row[7] != 0) {
					r += row[4];
					g += row[5];
					b += row[6];
					n++;
				}
				if (y-1 > 0 && row[-stride+3] != 0) {
					r += row[-stride];
					g += row[-stride+1];
					b += row[-stride+2];
					n++;
				}
				if (y+1 < h && row[stride+3] != 0) {
					r += row[stride];
					g += row[stride+1];
					b += row[stride+2];
					n++;
				}
				if (n > 0) {
					row[0] = (unsigned char)(r/n);
					row[1] = (unsigned char)(g/n);
					row[2] = (unsigned char)(b/n);
				}
			}
			row += 4;
		}
	}
}


static void nsvg__initPaint(NSVGcachedPaint* cache, NSVGpaint* paint, float opacity)
{
	int i, j;
	NSVGgradient* grad;

	cache->type = paint->type;

	if (paint->type == NSVG_PAINT_COLOR) {
		cache->colors[0] = nsvg__applyOpacity(paint->color, opacity);
		return;
	}

	grad = paint->gradient;

	cache->spread = grad->spread;
	memcpy(cache->xform, grad->xform, sizeof(float)*6);

	if (grad->nstops == 0) {
		for (i = 0; i < 256; i++)
			cache->colors[i] = 0;
	} if (grad->nstops == 1) {
		for (i = 0; i < 256; i++)
			cache->colors[i] = nsvg__applyOpacity(grad->stops[i].color, opacity);
	} else {
		unsigned int ca, cb = 0;
		float ua, ub, du, u;
		int ia, ib, count;

		ca = nsvg__applyOpacity(grad->stops[0].color, opacity);
		ua = nsvg__clampf(grad->stops[0].offset, 0, 1);
		ub = nsvg__clampf(grad->stops[grad->nstops-1].offset, ua, 1);
		ia = (int)(ua * 255.0f);
		ib = (int)(ub * 255.0f);
		for (i = 0; i < ia; i++) {
			cache->colors[i] = ca;
		}

		for (i = 0; i < grad->nstops-1; i++) {
			ca = nsvg__applyOpacity(grad->stops[i].color, opacity);
			cb = nsvg__applyOpacity(grad->stops[i+1].color, opacity);
			ua = nsvg__clampf(grad->stops[i].offset, 0, 1);
			ub = nsvg__clampf(grad->stops[i+1].offset, 0, 1);
			ia = (int)(ua * 255.0f);
			ib = (int)(ub * 255.0f);
			count = ib - ia;
			if (count <= 0) continue;
			u = 0;
			du = 1.0f / (float)count;
			for (j = 0; j < count; j++) {
				cache->colors[ia+j] = nsvg__lerpRGBA(ca,cb,u);
				u += du;
			}
		}

		for (i = ib; i < 256; i++)
			cache->colors[i] = cb;
	}

}

/*
static void dumpEdges(NSVGrasterizer* r, const char* name)
{
	float xmin = 0, xmax = 0, ymin = 0, ymax = 0;
	NSVGedge *e = NULL;
	int i;
	if (r->nedges == 0) return;
	FILE* fp = fopen(name, "w");
	if (fp == NULL) return;

	xmin = xmax = r->edges[0].x0;
	ymin = ymax = r->edges[0].y0;
	for (i = 0; i < r->nedges; i++) {
		e = &r->edges[i];
		xmin = nsvg__minf(xmin, e->x0);
		xmin = nsvg__minf(xmin, e->x1);
		xmax = nsvg__maxf(xmax, e->x0);
		xmax = nsvg__maxf(xmax, e->x1);
		ymin = nsvg__minf(ymin, e->y0);
		ymin = nsvg__minf(ymin, e->y1);
		ymax = nsvg__maxf(ymax, e->y0);
		ymax = nsvg__maxf(ymax, e->y1);
	}

	fprintf(fp, "<svg viewBox=\"%f %f %f %f\" xmlns=\"http://www.w3.org/2000/svg\">", xmin, ymin, (xmax - xmin), (ymax - ymin));

	for (i = 0; i < r->nedges; i++) {
		e = &r->edges[i];
		fprintf(fp ,"<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" style=\"stroke:#000;\" />", e->x0,e->y0, e->x1,e->y1);
	}

	for (i = 0; i < r->npoints; i++) {
		if (i+1 < r->npoints)
			fprintf(fp ,"<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" style=\"stroke:#f00;\" />", r->points[i].x, r->points[i].y, r->points[i+1].x, r->points[i+1].y);
		fprintf(fp ,"<circle cx=\"%f\" cy=\"%f\" r=\"1\" style=\"fill:%s;\" />", r->points[i].x, r->points[i].y, r->points[i].flags == 0 ? "#f00" : "#0f0");
	}

	fprintf(fp, "</svg>");
	fclose(fp);
}
*/

NANOSVG_SCOPE
void nsvgRasterize(NSVGrasterizer* r,
				   NSVGimage* image, float tx, float ty, float scale,
				   unsigned char* dst, int w, int h, int stride)
{
	NSVGshape *shape = NULL;
	NSVGedge *e = NULL;
	NSVGcachedPaint cache;
	int i;

	r->bitmap = dst;
	r->width = w;
	r->height = h;
	r->stride = stride;

	if (w > r->cscanline) {
		r->cscanline = w;
		r->scanline = (unsigned char*)NANOSVG_realloc(r->scanline, w);
		if (r->scanline == NULL) return;
	}

	for (i = 0; i < h; i++)
		memset(&dst[i*stride], 0, w*4);

	for (shape = image->shapes; shape != NULL; shape = shape->next) {
		if (!(shape->flags & NSVG_FLAGS_VISIBLE))
			continue;

		if (shape->fill.type != NSVG_PAINT_NONE) {
			nsvg__resetPool(r);
			r->freelist = NULL;
			r->nedges = 0;

			nsvg__flattenShape(r, shape, scale);

			// Scale and translate edges
			for (i = 0; i < r->nedges; i++) {
				e = &r->edges[i];
				e->x0 = tx + e->x0;
				e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
				e->x1 = tx + e->x1;
				e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
			}

			// Rasterize edges
			qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);

			// now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
			nsvg__initPaint(&cache, &shape->fill, shape->opacity);

			nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, shape->fillRule);
		}
		if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) {
			nsvg__resetPool(r);
			r->freelist = NULL;
			r->nedges = 0;

			nsvg__flattenShapeStroke(r, shape, scale);

//			dumpEdges(r, "edge.svg");

			// Scale and translate edges
			for (i = 0; i < r->nedges; i++) {
				e = &r->edges[i];
				e->x0 = tx + e->x0;
				e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
				e->x1 = tx + e->x1;
				e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
			}

			// Rasterize edges
			qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);

			// now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
			nsvg__initPaint(&cache, &shape->stroke, shape->opacity);

			nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, NSVG_FILLRULE_NONZERO);
		}
	}

	nsvg__unpremultiplyAlpha(dst, w, h, stride);

	r->bitmap = NULL;
	r->width = 0;
	r->height = 0;
	r->stride = 0;
}

#endif

		    int height);
typedef double	(Tk_ItemPointProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double *pointPtr);
typedef int	(Tk_ItemAreaProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double *rectPtr);
typedef int	(Tk_ItemPostscriptProc)(Tcl_Interp *interp, Tk_Canvas canvas,
		    Tk_Item *itemPtr, int prepass);


typedef void	(Tk_ItemScaleProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double originX, double originY, double scaleX,
		    double scaleY);
typedef void	(Tk_ItemTranslateProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double deltaX, double deltaY);
#ifdef USE_OLD_CANVAS
typedef int	(Tk_ItemIndexProc)(Tcl_Interp *interp, Tk_Canvas canvas,
................................................................................
    Tk_ItemInsertProc *insertProc;
				/* Procedure to insert something into an
				 * item. */
    Tk_ItemDCharsProc *dCharsProc;
				/* Procedure to delete characters from an
				 * item. */
    struct Tk_ItemType *nextPtr;/* Used to link types together into a list. */
    char *reserved1;		/* Reserved for future extension. */


    int reserved2;		/* Carefully compatible with */
    char *reserved3;		/* Jan Nijtmans dash patch */
    char *reserved4;
} Tk_ItemType;

/*
 * Flag (used in the alwaysRedraw field) to say whether an item supports

		    int height);
typedef double	(Tk_ItemPointProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double *pointPtr);
typedef int	(Tk_ItemAreaProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double *rectPtr);
typedef int	(Tk_ItemPostscriptProc)(Tcl_Interp *interp, Tk_Canvas canvas,
		    Tk_Item *itemPtr, int prepass);
typedef void	(Tk_ItemRotateProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double originX, double originY, double angleRadians);
typedef void	(Tk_ItemScaleProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double originX, double originY, double scaleX,
		    double scaleY);
typedef void	(Tk_ItemTranslateProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
		    double deltaX, double deltaY);
#ifdef USE_OLD_CANVAS
typedef int	(Tk_ItemIndexProc)(Tcl_Interp *interp, Tk_Canvas canvas,
................................................................................
    Tk_ItemInsertProc *insertProc;
				/* Procedure to insert something into an
				 * item. */
    Tk_ItemDCharsProc *dCharsProc;
				/* Procedure to delete characters from an
				 * item. */
    struct Tk_ItemType *nextPtr;/* Used to link types together into a list. */
    Tk_ItemRotateProc *rotateProc;
				/* Procedure to rotate an item's coordinates
				 * about a point. */
    int reserved2;		/* Carefully compatible with */
    char *reserved3;		/* Jan Nijtmans dash patch */
    char *reserved4;
} Tk_ItemType;

/*
 * Flag (used in the alwaysRedraw field) to say whether an item supports

		/*
		 * If a radiobutton has the empty string as value it should be
		 * selected.
		 */

 		if ((butPtr->type == TYPE_RADIO_BUTTON) &&
			(*Tcl_GetString(butPtr->onValuePtr) == 0)) {
		    butPtr->flags |= SELECTED;
		}
	    }
	}

	/*
	 * Get the images for the widget, if there are any. Allocate the new
................................................................................
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    register TkButton *butPtr = clientData;
    const char *value;
    Tcl_Obj *valuePtr;

    /*
     * See ticket [5d991b82].
     */

    if (butPtr->selVarNamePtr == NULL) {
	if (!(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_UntraceVar2(interp, name1, name2,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonVarProc, clientData);
	}
	return NULL;
    }

    /*
     * If the variable is being unset, then just re-establish the trace unless
     * the whole interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	butPtr->flags &= ~(SELECTED | TRISTATED);
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {




















	    Tcl_TraceVar2(interp, Tcl_GetString(butPtr->selVarNamePtr),
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonVarProc, clientData);
	}
	goto redisplay;
    }

................................................................................
 */

	/* ARGSUSED */
static char *
ButtonTextVarProc(
    ClientData clientData,	/* Information about button. */
    Tcl_Interp *interp,		/* Interpreter containing variable. */
    const char *name1,		/* Name of variable. */
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    TkButton *butPtr = clientData;
    Tcl_Obj *valuePtr;

    if (butPtr->flags & BUTTON_DELETED) {
	return NULL;
    }

    /*
     * See ticket [5d991b82].
     */

    if (butPtr->textVarNamePtr == NULL) {
	if (!(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_UntraceVar2(interp, name1, name2,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonTextVarProc, clientData);
	}
 	return NULL;
     }

    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {



























	    Tcl_ObjSetVar2(interp, butPtr->textVarNamePtr, NULL,
		    butPtr->textPtr, TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, Tcl_GetString(butPtr->textVarNamePtr),
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonTextVarProc, clientData);
	}
	return NULL;

		/*
		 * If a radiobutton has the empty string as value it should be
		 * selected.
		 */

 		if ((butPtr->type == TYPE_RADIO_BUTTON) &&
			(*Tcl_GetString(butPtr->onValuePtr) == '\0')) {
		    butPtr->flags |= SELECTED;
		}
	    }
	}

	/*
	 * Get the images for the widget, if there are any. Allocate the new
................................................................................
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    register TkButton *butPtr = clientData;
    const char *value;
    Tcl_Obj *valuePtr;














    /*
     * If the variable is being unset, then just re-establish the trace unless
     * the whole interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	butPtr->flags &= ~(SELECTED | TRISTATED);
	if (!Tcl_InterpDeleted(interp)) {
	    ClientData probe = NULL;

	    do {
		probe = Tcl_VarTraceInfo(interp,
			Tcl_GetString(butPtr->selVarNamePtr),
			TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
			ButtonVarProc, probe);
		if (probe == (ClientData)butPtr) {
		    break;
		}
	    } while (probe);
	    if (probe) {
		/*
		 * We were able to fetch the unset trace for our
		 * selVarNamePtr, which means it is not unset and not
		 * the cause of this unset trace. Instead some outdated
		 * former variable must be, and we should ignore it.
		 */
		goto redisplay;
	    }
	    Tcl_TraceVar2(interp, Tcl_GetString(butPtr->selVarNamePtr),
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonVarProc, clientData);
	}
	goto redisplay;
    }

................................................................................
 */

	/* ARGSUSED */
static char *
ButtonTextVarProc(
    ClientData clientData,	/* Information about button. */
    Tcl_Interp *interp,		/* Interpreter containing variable. */
    const char *name1,		/* Not used. */
    const char *name2,		/* Not used. */
    int flags)			/* Information about what happened. */
{
    TkButton *butPtr = clientData;
    Tcl_Obj *valuePtr;

    if (butPtr->flags & BUTTON_DELETED) {
	return NULL;
    }














    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	if (!Tcl_InterpDeleted(interp) && butPtr->textVarNamePtr != NULL) {

	    /*
	     * An unset trace on some variable brought us here, but is it
	     * the variable we have stored in butPtr->textVarNamePtr ?
	     */

	    ClientData probe = NULL;

	    do {
		probe = Tcl_VarTraceInfo(interp,
			Tcl_GetString(butPtr->textVarNamePtr),
			TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
			ButtonTextVarProc, probe);
		if (probe == (ClientData)butPtr) {
		    break;
		}
	    } while (probe);
	    if (probe) {
		/*
		 * We were able to fetch the unset trace for our
		 * textVarNamePtr, which means it is not unset and not
		 * the cause of this unset trace. Instead some outdated
		 * former textvariable must be, and we should ignore it.
		 */
		return NULL;
	    }

	    Tcl_ObjSetVar2(interp, butPtr->textVarNamePtr, NULL,
		    butPtr->textPtr, TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, Tcl_GetString(butPtr->textVarNamePtr),
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonTextVarProc, clientData);
	}
	return NULL;

 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tkInt.h"
#include "tkCanvas.h"



/*
 * The structure below defines the record for each arc item.
 */

typedef enum {
    PIESLICE_STYLE, CHORD_STYLE, ARC_STYLE
} Style;
................................................................................
 * Prototypes for functions defined in this file:
 */

static void		ComputeArcBbox(Tk_Canvas canvas, ArcItem *arcPtr);
static int		ConfigureArc(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
			    Tcl_Obj *const objv[], int flags);
static void		ComputeArcFromHeight(ArcItem *arcPtr);
static int		CreateArc(Tcl_Interp *interp,
			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int objc, Tcl_Obj *const objv[]);
static void		DeleteArc(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayArc(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
................................................................................
static void		ComputeArcOutline(Tk_Canvas canvas, ArcItem *arcPtr);
static int		HorizLineToArc(double x1, double x2,
			    double y, double rx, double ry,
			    double start, double extent);
static int		VertLineToArc(double x, double y1,
			    double y2, double rx, double ry,
			    double start, double extent);



/*
 * The structures below defines the arc item types by means of functions that
 * can be invoked by generic item code.
 */

Tk_ItemType tkArcType = {
................................................................................
    TranslateArc,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */

    NULL, 0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * CreateArc --
 *
................................................................................
	    arcPtr->activeFillStipple != None) {
	itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
    } else {
	itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
    }

    /*
     * If either the height is provided then the start and extent will be
     * overridden.
     */
    if (arcPtr->height != 0) {

	ComputeArcFromHeight(arcPtr);
	ComputeArcBbox(canvas, arcPtr);
    }


    i = (int) (arcPtr->start/360.0);
    arcPtr->start -= i*360.0;
    if (arcPtr->start < 0) {
	arcPtr->start += 360.0;
    }
    i = (int) (arcPtr->extent/360.0);
................................................................................
    ComputeArcBbox(canvas, arcPtr);
    return TCL_OK;
}
 
/*
 *--------------------------------------------------------------
 *
 * ComputeArcFromHeight --
 *
 *	This function calculates the arc parameters given start-point,
 *	end-point and height (!= 0).
 *
 * Results:
 *	None.
 *
................................................................................
 * Side effects:
 *	The height parameter is set to 0 on exit.
 *
 *--------------------------------------------------------------
 */

static void
ComputeArcFromHeight(
    ArcItem* arcPtr)
{
    double chordLen, chordDir[2], chordCen[2], arcCen[2], d, radToDeg, radius;

    /*
     * The chord.







     */

    chordLen = hypot(arcPtr->endPoint[1] - arcPtr->startPoint[1],
	    arcPtr->startPoint[0] - arcPtr->endPoint[0]);






    chordDir[0] = (arcPtr->endPoint[0] - arcPtr->startPoint[0]) / chordLen;
    chordDir[1] = (arcPtr->endPoint[1] - arcPtr->startPoint[1]) / chordLen;
    chordCen[0] = (arcPtr->startPoint[0] + arcPtr->endPoint[0]) / 2;
    chordCen[1] = (arcPtr->startPoint[1] + arcPtr->endPoint[1]) / 2;

    /*
     * Calculate the radius (assumes height != 0).
................................................................................
	arcPtr->bbox[2] = arcPtr->bbox[0];
	arcPtr->bbox[0] = tmp;
    }

    ComputeArcOutline(canvas,arcPtr);

    /*
     * To compute the bounding box, start with the the bbox formed by the two
     * endpoints of the arc. Then add in the center of the arc's oval (if
     * relevant) and the 3-o'clock, 6-o'clock, 9-o'clock, and 12-o'clock
     * positions, if they are relevant.
     */

    arcPtr->header.x1 = arcPtr->header.x2 = (int) arcPtr->center1[0];
    arcPtr->header.y1 = arcPtr->header.y2 = (int) arcPtr->center1[1];
................................................................................
{
    ArcItem *arcPtr = (ArcItem *) itemPtr;

    arcPtr->bbox[0] = originX + scaleX*(arcPtr->bbox[0] - originX);
    arcPtr->bbox[1] = originY + scaleY*(arcPtr->bbox[1] - originY);
    arcPtr->bbox[2] = originX + scaleX*(arcPtr->bbox[2] - originX);
    arcPtr->bbox[3] = originY + scaleY*(arcPtr->bbox[3] - originY);






















































    ComputeArcBbox(canvas, arcPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * TranslateArc --

 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tkInt.h"
#include "tkCanvas.h"

#include "float.h"

/*
 * The structure below defines the record for each arc item.
 */

typedef enum {
    PIESLICE_STYLE, CHORD_STYLE, ARC_STYLE
} Style;
................................................................................
 * Prototypes for functions defined in this file:
 */

static void		ComputeArcBbox(Tk_Canvas canvas, ArcItem *arcPtr);
static int		ConfigureArc(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
			    Tcl_Obj *const objv[], int flags);
static void		ComputeArcParametersFromHeight(ArcItem *arcPtr);
static int		CreateArc(Tcl_Interp *interp,
			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int objc, Tcl_Obj *const objv[]);
static void		DeleteArc(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayArc(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
................................................................................
static void		ComputeArcOutline(Tk_Canvas canvas, ArcItem *arcPtr);
static int		HorizLineToArc(double x1, double x2,
			    double y, double rx, double ry,
			    double start, double extent);
static int		VertLineToArc(double x, double y1,
			    double y2, double rx, double ry,
			    double start, double extent);
static void		RotateArc(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);

/*
 * The structures below defines the arc item types by means of functions that
 * can be invoked by generic item code.
 */

Tk_ItemType tkArcType = {
................................................................................
    TranslateArc,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */
    RotateArc,			/* rotateProc */
    0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * CreateArc --
 *
................................................................................
	    arcPtr->activeFillStipple != None) {
	itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
    } else {
	itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
    }

    /*
     * Override the start and extent if the height is given.

     */


    ComputeArcParametersFromHeight(arcPtr);


    ComputeArcBbox(canvas, arcPtr);

    i = (int) (arcPtr->start/360.0);
    arcPtr->start -= i*360.0;
    if (arcPtr->start < 0) {
	arcPtr->start += 360.0;
    }
    i = (int) (arcPtr->extent/360.0);
................................................................................
    ComputeArcBbox(canvas, arcPtr);
    return TCL_OK;
}
 
/*
 *--------------------------------------------------------------
 *
 * ComputeArcParametersFromHeight --
 *
 *	This function calculates the arc parameters given start-point,
 *	end-point and height (!= 0).
 *
 * Results:
 *	None.
 *
................................................................................
 * Side effects:
 *	The height parameter is set to 0 on exit.
 *
 *--------------------------------------------------------------
 */

static void
ComputeArcParametersFromHeight(
    ArcItem* arcPtr)
{
    double chordLen, chordDir[2], chordCen[2], arcCen[2], d, radToDeg, radius;

    /*
     * Do nothing if no height has been specified.
     */

    if (arcPtr->height == 0)
        return;

    /*
     * Calculate the chord length, return early if it is too small.
     */

    chordLen = hypot(arcPtr->endPoint[1] - arcPtr->startPoint[1],
	    arcPtr->startPoint[0] - arcPtr->endPoint[0]);

    if (chordLen < DBL_EPSILON) {
        arcPtr->start = arcPtr->extent = arcPtr->height = 0;
        return;
    }

    chordDir[0] = (arcPtr->endPoint[0] - arcPtr->startPoint[0]) / chordLen;
    chordDir[1] = (arcPtr->endPoint[1] - arcPtr->startPoint[1]) / chordLen;
    chordCen[0] = (arcPtr->startPoint[0] + arcPtr->endPoint[0]) / 2;
    chordCen[1] = (arcPtr->startPoint[1] + arcPtr->endPoint[1]) / 2;

    /*
     * Calculate the radius (assumes height != 0).
................................................................................
	arcPtr->bbox[2] = arcPtr->bbox[0];
	arcPtr->bbox[0] = tmp;
    }

    ComputeArcOutline(canvas,arcPtr);

    /*
     * To compute the bounding box, start with the bbox formed by the two
     * endpoints of the arc. Then add in the center of the arc's oval (if
     * relevant) and the 3-o'clock, 6-o'clock, 9-o'clock, and 12-o'clock
     * positions, if they are relevant.
     */

    arcPtr->header.x1 = arcPtr->header.x2 = (int) arcPtr->center1[0];
    arcPtr->header.y1 = arcPtr->header.y2 = (int) arcPtr->center1[1];
................................................................................
{
    ArcItem *arcPtr = (ArcItem *) itemPtr;

    arcPtr->bbox[0] = originX + scaleX*(arcPtr->bbox[0] - originX);
    arcPtr->bbox[1] = originY + scaleY*(arcPtr->bbox[1] - originY);
    arcPtr->bbox[2] = originX + scaleX*(arcPtr->bbox[2] - originX);
    arcPtr->bbox[3] = originY + scaleY*(arcPtr->bbox[3] - originY);
    ComputeArcBbox(canvas, arcPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * RotateArc --
 *
 *	This function is called to rotate an arc by a given amount.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the arc is rotated by angleRad radians about (originX,
 *	originY), and the bounding box is updated in the generic part of the
 *	item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotateArc(
    Tk_Canvas canvas,
    Tk_Item *itemPtr,
    double originX,
    double originY,
    double angleRad)
{
    ArcItem *arcPtr = (ArcItem *) itemPtr;
    double newX, newY, oldX, oldY;

    /*
     * Compute the centre of the box, then rotate that about the origin.
     */

    newX = oldX = (arcPtr->bbox[0] + arcPtr->bbox[2]) / 2.0;
    newY = oldY = (arcPtr->bbox[1] + arcPtr->bbox[3]) / 2.0;
    TkRotatePoint(originX, originY, sin(angleRad), cos(angleRad),
	    &newX, &newY);

    /*
     * Apply the translation to the box.
     */

    arcPtr->bbox[0] += newX - oldX;
    arcPtr->bbox[1] += newY - oldY;
    arcPtr->bbox[2] += newX - oldX;
    arcPtr->bbox[3] += newY - oldY;

    /*
     * TODO: update the arc endpoints?
     */

    ComputeArcBbox(canvas, arcPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * TranslateArc --

			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int objc, Tcl_Obj *const objv[]);
static void		DeleteBitmap(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayBitmap(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
			    int x, int y, int width, int height);


static void		ScaleBitmap(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateBitmap(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double deltaX, double deltaY);

/*
................................................................................
    TranslateBitmap,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */

    NULL, 0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * TkcCreateBitmap --
 *
................................................................................
{
    BitmapItem *bmapPtr = (BitmapItem *) itemPtr;

    bmapPtr->x = originX + scaleX*(bmapPtr->x - originX);
    bmapPtr->y = originY + scaleY*(bmapPtr->y - originY);
    ComputeBitmapBbox(canvas, bmapPtr);
}

































 
/*
 *--------------------------------------------------------------
 *
 * TranslateBitmap --
 *
 *	This function is called to move an item by a given amount.

			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int objc, Tcl_Obj *const objv[]);
static void		DeleteBitmap(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayBitmap(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
			    int x, int y, int width, int height);
static void		RotateBitmap(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);
static void		ScaleBitmap(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateBitmap(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double deltaX, double deltaY);

/*
................................................................................
    TranslateBitmap,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */
    RotateBitmap,		/* rotateProc */
    0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * TkcCreateBitmap --
 *
................................................................................
{
    BitmapItem *bmapPtr = (BitmapItem *) itemPtr;

    bmapPtr->x = originX + scaleX*(bmapPtr->x - originX);
    bmapPtr->y = originY + scaleY*(bmapPtr->y - originY);
    ComputeBitmapBbox(canvas, bmapPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * RotateBitmap --
 *
 *	This function is called to rotate a bitmap's origin by a given amount.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the bitmap is rotated by angleRad radians about
 *	(originX, originY), and the bounding box is updated in the generic
 *	part of the item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotateBitmap(
    Tk_Canvas canvas,
    Tk_Item *itemPtr,
    double originX,
    double originY,
    double angleRad)
{
    BitmapItem *bmapPtr = (BitmapItem *) itemPtr;

    TkRotatePoint(originX, originY, sin(angleRad), cos(angleRad),
	    &bmapPtr->x, &bmapPtr->y);
    ComputeBitmapBbox(canvas, bmapPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * TranslateBitmap --
 *
 *	This function is called to move an item by a given amount.

			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int argc, Tcl_Obj *const argv[]);
static void		DeleteImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
			    int x, int y, int width, int height);


static void		ScaleImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);

/*
................................................................................
    TranslateImage,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */

    NULL, 0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * CreateImage --
 *
................................................................................

	Tcl_AppendPrintfToObj(psObj, "%.15g %.15g translate\n", x, y);
    }

    return Tk_PostscriptImage(image, interp, canvasWin,
	    ((TkCanvas *) canvas)->psInfo, 0, 0, width, height, prepass);
}


































 
/*
 *--------------------------------------------------------------
 *
 * ScaleImage --
 *
 *	This function is invoked to rescale an item.

			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int argc, Tcl_Obj *const argv[]);
static void		DeleteImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
			    int x, int y, int width, int height);
static void		RotateImage(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);
static void		ScaleImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateImage(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);

/*
................................................................................
    TranslateImage,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */
    RotateImage,		/* rotateProc */
    0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * CreateImage --
 *
................................................................................

	Tcl_AppendPrintfToObj(psObj, "%.15g %.15g translate\n", x, y);
    }

    return Tk_PostscriptImage(image, interp, canvasWin,
	    ((TkCanvas *) canvas)->psInfo, 0, 0, width, height, prepass);
}
 
/*
 *--------------------------------------------------------------
 *
 * RotateImage --
 *
 *	This function is called to rotate an image's origin by a given amount.
 *	This does *not* rotate the contents of the image.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the image anchor is rotated by angleRad radians about
 *	(originX, originY), and the bounding box is updated in the generic
 *	part of the item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotateImage(
    Tk_Canvas canvas,
    Tk_Item *itemPtr,
    double originX,
    double originY,
    double angleRad)
{
    ImageItem *imgPtr = (ImageItem *) itemPtr;

    TkRotatePoint(originX, originY, sin(angleRad), cos(angleRad),
	    &imgPtr->x, &imgPtr->y);
    ComputeImageBbox(canvas, imgPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * ScaleImage --
 *
 *	This function is invoked to rescale an item.

			    Tcl_FreeProc **freeProcPtr);
static int		ParseArrowShape(ClientData clientData,
			    Tcl_Interp *interp, Tk_Window tkwin,
			    const char *value, char *recordPtr, int offset);
static const char * PrintArrowShape(ClientData clientData,
			    Tk_Window tkwin, char *recordPtr, int offset,
			    Tcl_FreeProc **freeProcPtr);


static void		ScaleLine(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateLine(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);
 
/*
................................................................................
    TranslateLine,			/* translateProc */
    GetLineIndex,			/* indexProc */
    NULL,				/* icursorProc */
    NULL,				/* selectionProc */
    LineInsert,				/* insertProc */
    LineDeleteCoords,			/* dTextProc */
    NULL,				/* nextPtr */

    NULL, 0, NULL, NULL
};

/*
 * The definition below determines how large are static arrays used to hold
 * spline points (splines larger than this have to have their arrays
 * malloc-ed).
 */
................................................................................
    }
    if (linePtr->lastArrowPtr != NULL) {
	for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW;
		i++, coordPtr += 2) {
	    coordPtr[0] += deltaX;
	    coordPtr[1] += deltaY;
	}


















































    }
    ComputeLineBbox(canvas, linePtr);
}
 
/*
 *--------------------------------------------------------------
 *

			    Tcl_FreeProc **freeProcPtr);
static int		ParseArrowShape(ClientData clientData,
			    Tcl_Interp *interp, Tk_Window tkwin,
			    const char *value, char *recordPtr, int offset);
static const char * PrintArrowShape(ClientData clientData,
			    Tk_Window tkwin, char *recordPtr, int offset,
			    Tcl_FreeProc **freeProcPtr);
static void		RotateLine(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);
static void		ScaleLine(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateLine(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);
 
/*
................................................................................
    TranslateLine,			/* translateProc */
    GetLineIndex,			/* indexProc */
    NULL,				/* icursorProc */
    NULL,				/* selectionProc */
    LineInsert,				/* insertProc */
    LineDeleteCoords,			/* dTextProc */
    NULL,				/* nextPtr */
    RotateLine,				/* rotateProc */
    0, NULL, NULL
};

/*
 * The definition below determines how large are static arrays used to hold
 * spline points (splines larger than this have to have their arrays
 * malloc-ed).
 */
................................................................................
    }
    if (linePtr->lastArrowPtr != NULL) {
	for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW;
		i++, coordPtr += 2) {
	    coordPtr[0] += deltaX;
	    coordPtr[1] += deltaY;
	}
    }
    ComputeLineBbox(canvas, linePtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * RotateLine --
 *
 *	This function is called to rotate a line by a given amount about a
 *	point.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the line is rotated by angleRad about (originX,
 *	originY), and the bounding box is updated in the generic part of the
 *	item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotateLine(
    Tk_Canvas canvas,		/* Canvas containing item. */
    Tk_Item *itemPtr,		/* Item that is being moved. */
    double originX, double originY,
    double angleRad)		/* Amount by which item is to be rotated. */
{
    LineItem *linePtr = (LineItem *) itemPtr;
    double *coordPtr;
    int i;
    double s = sin(angleRad), c = cos(angleRad);

    for (i = 0, coordPtr = linePtr->coordPtr; i < linePtr->numPoints;
	    i++, coordPtr += 2) {
	TkRotatePoint(originX, originY, s, c, &coordPtr[0], &coordPtr[1]);
    }
    if (linePtr->firstArrowPtr != NULL) {
	for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW;
		i++, coordPtr += 2) {
	    TkRotatePoint(originX, originY, s, c, &coordPtr[0], &coordPtr[1]);
	}
    }
    if (linePtr->lastArrowPtr != NULL) {
	for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW;
		i++, coordPtr += 2) {
	    TkRotatePoint(originX, originY, s, c, &coordPtr[0], &coordPtr[1]);
	}
    }
    ComputeLineBbox(canvas, linePtr);
}
 
/*
 *--------------------------------------------------------------
 *

			    Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj);
static int		PolygonToArea(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *rectPtr);
static double		PolygonToPoint(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *pointPtr);
static int		PolygonToPostscript(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);


static void		ScalePolygon(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslatePolygon(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);

/*
................................................................................
    DisplayPolygon,			/* displayProc */
    TK_CONFIG_OBJS | TK_MOVABLE_POINTS,	/* flags */
    PolygonToPoint,			/* pointProc */
    PolygonToArea,			/* areaProc */
    PolygonToPostscript,		/* postscriptProc */
    ScalePolygon,			/* scaleProc */
    TranslatePolygon,			/* translateProc */
    GetPolygonIndex,	/* indexProc */
    NULL,				/* icursorProc */
    NULL,				/* selectionProc */
    PolygonInsert,		/* insertProc */
    PolygonDeleteCoords,		/* dTextProc */
    NULL,				/* nextPtr */

    NULL, 0, NULL, NULL
};

/*
 * The definition below determines how large are static arrays used to hold
 * spline points (splines larger than this have to have their arrays
 * malloc-ed).
 */
................................................................................
     */

  badIndex:
    Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad index \"%s\"", string));
    Tcl_SetErrorCode(interp, "TK", "CANVAS", "ITEM_INDEX", "POLY", NULL);
    return TCL_ERROR;
}






































 
/*
 *--------------------------------------------------------------
 *
 * TranslatePolygon --
 *
 *	This function is called to move a polygon by a given amount.

			    Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj);
static int		PolygonToArea(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *rectPtr);
static double		PolygonToPoint(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *pointPtr);
static int		PolygonToPostscript(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
static void		RotatePolygon(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);
static void		ScalePolygon(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslatePolygon(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);

/*
................................................................................
    DisplayPolygon,			/* displayProc */
    TK_CONFIG_OBJS | TK_MOVABLE_POINTS,	/* flags */
    PolygonToPoint,			/* pointProc */
    PolygonToArea,			/* areaProc */
    PolygonToPostscript,		/* postscriptProc */
    ScalePolygon,			/* scaleProc */
    TranslatePolygon,			/* translateProc */
    GetPolygonIndex,			/* indexProc */
    NULL,				/* icursorProc */
    NULL,				/* selectionProc */
    PolygonInsert,			/* insertProc */
    PolygonDeleteCoords,		/* dTextProc */
    NULL,				/* nextPtr */
    RotatePolygon,			/* rotateProc */
    0, NULL, NULL
};

/*
 * The definition below determines how large are static arrays used to hold
 * spline points (splines larger than this have to have their arrays
 * malloc-ed).
 */
................................................................................
     */

  badIndex:
    Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad index \"%s\"", string));
    Tcl_SetErrorCode(interp, "TK", "CANVAS", "ITEM_INDEX", "POLY", NULL);
    return TCL_ERROR;
}
 
/*
 *--------------------------------------------------------------
 *
 * RotatePolygon --
 *
 *	This function is called to rotate a polygon by a given amount about a
 *	point.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the polygon is rotated by angleRad about (originX,
 *	originY), and the bounding box is updated in the generic part of the
 *	item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotatePolygon(
    Tk_Canvas canvas,		/* Canvas containing item. */
    Tk_Item *itemPtr,		/* Item that is being moved. */
    double originX, double originY,
    double angleRad)		/* Amount by which item is to be rotated. */
{
    PolygonItem *polyPtr = (PolygonItem *) itemPtr;
    double *coordPtr;
    int i;
    double s = sin(angleRad), c = cos(angleRad);

    for (i = 0, coordPtr = polyPtr->coordPtr; i < polyPtr->numPoints;
	    i++, coordPtr += 2) {
	TkRotatePoint(originX, originY, s, c, &coordPtr[0], &coordPtr[1]);
    }
    ComputePolygonBbox(canvas, polyPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * TranslatePolygon --
 *
 *	This function is called to move a polygon by a given amount.

			    Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj);
static int		TextToArea(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *rectPtr);
static double		TextToPoint(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *pointPtr);
static int		TextToPostscript(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);


static void		TranslateText(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);

/*
 * The structures below defines the rectangle and oval item types by means of
 * functions that can be invoked by generic item code.
 */
................................................................................
    TranslateText,		/* translateProc */
    GetTextIndex,		/* indexProc */
    SetTextCursor,		/* icursorProc */
    GetSelText,			/* selectionProc */
    TextInsert,			/* insertProc */
    TextDeleteChars,		/* dTextProc */
    NULL,			/* nextPtr */

    NULL, 0, NULL, NULL
};

#define ROUND(d) ((int) floor((d) + 0.5))
 
/*
 *--------------------------------------------------------------
 *
................................................................................
    return TkIntersectAngledTextLayout(textPtr->textLayout,
	    (int) ((rectPtr[0] + 0.5) - textPtr->drawOrigin[0]),
	    (int) ((rectPtr[1] + 0.5) - textPtr->drawOrigin[1]),
	    (int) (rectPtr[2] - rectPtr[0] + 0.5),
	    (int) (rectPtr[3] - rectPtr[1] + 0.5),
	    textPtr->angle);
}

































 
/*
 *--------------------------------------------------------------
 *
 * ScaleText --
 *
 *	This function is invoked to rescale a text item.

			    Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj);
static int		TextToArea(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *rectPtr);
static double		TextToPoint(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double *pointPtr);
static int		TextToPostscript(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
static void		RotateText(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);
static void		TranslateText(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);

/*
 * The structures below defines the rectangle and oval item types by means of
 * functions that can be invoked by generic item code.
 */
................................................................................
    TranslateText,		/* translateProc */
    GetTextIndex,		/* indexProc */
    SetTextCursor,		/* icursorProc */
    GetSelText,			/* selectionProc */
    TextInsert,			/* insertProc */
    TextDeleteChars,		/* dTextProc */
    NULL,			/* nextPtr */
    RotateText,			/* rotateProc */
    0, NULL, NULL
};

#define ROUND(d) ((int) floor((d) + 0.5))
 
/*
 *--------------------------------------------------------------
 *
................................................................................
    return TkIntersectAngledTextLayout(textPtr->textLayout,
	    (int) ((rectPtr[0] + 0.5) - textPtr->drawOrigin[0]),
	    (int) ((rectPtr[1] + 0.5) - textPtr->drawOrigin[1]),
	    (int) (rectPtr[2] - rectPtr[0] + 0.5),
	    (int) (rectPtr[3] - rectPtr[1] + 0.5),
	    textPtr->angle);
}
 
/*
 *--------------------------------------------------------------
 *
 * RotateText --
 *
 *	This function is called to rotate a text item by a given amount about a
 *	point. Note that this does *not* rotate the text of the item.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the text anchor is rotated by angleRad about (originX,
 *	originY), and the bounding box is updated in the generic part of the
 *	item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotateText(
    Tk_Canvas canvas,		/* Canvas containing item. */
    Tk_Item *itemPtr,		/* Item that is being rotated. */
    double originX, double originY,
    double angleRad)		/* Amount by which item is to be rotated. */
{
    TextItem *textPtr = (TextItem *) itemPtr;

    TkRotatePoint(originX, originY, sin(angleRad), cos(angleRad),
	    &textPtr->x, &textPtr->y);
    ComputeTextBbox(canvas, textPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * ScaleText --
 *
 *	This function is invoked to rescale a text item.

	Tk_CanvasSetOffset(canvas, outline->gc, tsoffset);
	tsoffset->xoffset += w;
	tsoffset->yoffset += h;
	return 1;
    }
    return 0;
}

 
/*
 *--------------------------------------------------------------
 *
 * Tk_ResetOutlineGC
 *
 *	Restores the GC to the situation before Tk_ChangeOutlineGC() was
................................................................................
	TranslateAndAppendCoords(canvPtr, a[i*2], a[i*2+1], outArr, i);
    }
    if (tempArr != staticSpace) {
	ckfree(tempArr);
    }
    return numOutput;
}





































 
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

	Tk_CanvasSetOffset(canvas, outline->gc, tsoffset);
	tsoffset->xoffset += w;
	tsoffset->yoffset += h;
	return 1;
    }
    return 0;
}

 
/*
 *--------------------------------------------------------------
 *
 * Tk_ResetOutlineGC
 *
 *	Restores the GC to the situation before Tk_ChangeOutlineGC() was
................................................................................
	TranslateAndAppendCoords(canvPtr, a[i*2], a[i*2+1], outArr, i);
    }
    if (tempArr != staticSpace) {
	ckfree(tempArr);
    }
    return numOutput;
}
 
/*
 *--------------------------------------------------------------
 *
 * TkRotatePoint --
 *
 *	Rotate a point about another point. The angle should be converted into
 *	its sine and cosine before calling this function.
 *
 * Results:
 *	None
 *
 * Side effects:
 *	The point in (*xPtr,*yPtr) is updated to be rotated about
 *	(originX,originY) by the amount given by the sine and cosine of the
 *	angle to rotate.
 *
 *--------------------------------------------------------------
 */

void
TkRotatePoint(
    double originX, double originY,	/* The point about which to rotate. */
    double sine, double cosine,		/* How much to rotate? */
    double *xPtr, double *yPtr)		/* The point to be rotated. (INOUT) */
{
    double x = *xPtr - originX;
    double y = *yPtr - originY;

    /*
     * Beware! The canvas coordinate space is flipped vertically, so rotations
     * go the "wrong" way with respect to mathematics.
     */

    *xPtr = originX + x * cosine + y * sine;
    *yPtr = originY - x * sine + y * cosine;
}
 
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int objc, Tcl_Obj *const objv[]);
static void		DeleteWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
			    int x, int y, int width, int height);


static void		ScaleWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);
static int		WinItemCoords(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
................................................................................
    TranslateWinItem,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* cursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */

    NULL, 0, NULL, NULL
};

/*
 * The structure below defines the official type record for the canvas (as
 * geometry manager):
 */

................................................................................
	Tcl_AppendObjToObj(Tcl_GetObjResult(interp), psObj);
    } else {
	Tcl_DiscardInterpState(interpState);
    }
    Tcl_DecrRefCount(psObj);
    return result;
}


































 
/*
 *--------------------------------------------------------------
 *
 * ScaleWinItem --
 *
 *	This function is invoked to rescale a window item.

			    Tk_Canvas canvas, struct Tk_Item *itemPtr,
			    int objc, Tcl_Obj *const objv[]);
static void		DeleteWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display);
static void		DisplayWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, Display *display, Drawable dst,
			    int x, int y, int width, int height);
static void		RotateWinItem(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);
static void		ScaleWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateWinItem(Tk_Canvas canvas,
			    Tk_Item *itemPtr, double deltaX, double deltaY);
static int		WinItemCoords(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
................................................................................
    TranslateWinItem,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* cursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */
    RotateWinItem,		/* rotateProc */
    0, NULL, NULL
};

/*
 * The structure below defines the official type record for the canvas (as
 * geometry manager):
 */

................................................................................
	Tcl_AppendObjToObj(Tcl_GetObjResult(interp), psObj);
    } else {
	Tcl_DiscardInterpState(interpState);
    }
    Tcl_DecrRefCount(psObj);
    return result;
}
 
/*
 *--------------------------------------------------------------
 *
 * RotateWinItem --
 *
 *	This function is called to rotate a window item by a given amount
 *	about a point. Note that this does *not* rotate the window of the
 *	item.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the window anchor is rotated by angleRad about (originX,
 *	originY), and the bounding box is updated in the generic part of the
 *	item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotateWinItem(
    Tk_Canvas canvas,		/* Canvas containing item. */
    Tk_Item *itemPtr,		/* Item that is being rotated. */
    double originX, double originY,
    double angleRad)		/* Amount by which item is to be rotated. */
{
    WindowItem *winItemPtr = (WindowItem *) itemPtr;

    TkRotatePoint(originX, originY, sin(angleRad), cos(angleRad),
	    &winItemPtr->x, &winItemPtr->y);
    ComputeWindowBbox(canvas, winItemPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * ScaleWinItem --
 *
 *	This function is invoked to rescale a window item.

static int		CanvasWidgetCmd(ClientData clientData,
			    Tcl_Interp *interp, int argc,
			    Tcl_Obj *const *argv);
static void		CanvasWorldChanged(ClientData instanceData);
static int		ConfigureCanvas(Tcl_Interp *interp,
			    TkCanvas *canvasPtr, int argc,
			    Tcl_Obj *const *argv, int flags);



static void		DestroyCanvas(void *memPtr);
static int		DrawCanvas(Tcl_Interp *interp, ClientData clientData, Tk_PhotoHandle photohandle, int subsample, int zoom);
static void		DisplayCanvas(ClientData clientData);
static void		DoItem(Tcl_Obj *accumObj,
			    Tk_Item *itemPtr, Tk_Uid tag);
static void		EventuallyRedrawItem(TkCanvas *canvasPtr,
			    Tk_Item *itemPtr);
................................................................................
    Tk_Item *itemPtr,
    double xDelta,
    double yDelta)
{
    itemPtr->typePtr->translateProc((Tk_Canvas) canvasPtr, itemPtr,
	    xDelta, yDelta);
}
































































































 
/*
 *--------------------------------------------------------------
 *
 * Tk_CanvasObjCmd --
 *
 *	This function is invoked to process the "canvas" Tcl command. See the
................................................................................

    int index;
    static const char *const optionStrings[] = {
	"addtag",	"bbox",		"bind",		"canvasx",
	"canvasy",	"cget",		"configure",	"coords",
	"create",	"dchars",	"delete",	"dtag",
	"find",		"focus",	"gettags",	"icursor",
        "image",
	"imove",	"index",	"insert",	"itemcget",
	"itemconfigure",
	"lower",	"move",		"moveto",	"postscript",
	"raise",	"rchars",	"scale",	"scan",
	"select",	"type",		"xview",	"yview",
	NULL
    };
    enum options {
	CANV_ADDTAG,	CANV_BBOX,	CANV_BIND,	CANV_CANVASX,
	CANV_CANVASY,	CANV_CGET,	CANV_CONFIGURE,	CANV_COORDS,
	CANV_CREATE,	CANV_DCHARS,	CANV_DELETE,	CANV_DTAG,
	CANV_FIND,	CANV_FOCUS,	CANV_GETTAGS,	CANV_ICURSOR,
        CANV_IMAGE,
	CANV_IMOVE,	CANV_INDEX,	CANV_INSERT,	CANV_ITEMCGET,
	CANV_ITEMCONFIGURE,
	CANV_LOWER,	CANV_MOVE,	CANV_MOVETO,	CANV_POSTSCRIPT,
	CANV_RAISE,	CANV_RCHARS,	CANV_SCALE,	CANV_SCAN,
	CANV_SELECT,	CANV_TYPE,	CANV_XVIEW,	CANV_YVIEW

    };

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0,
................................................................................
            if (!(dontRedraw1 && dontRedraw2)) {
		Tk_CanvasEventuallyRedraw((Tk_Canvas) canvasPtr,
			x1, y1, x2, y2);
		EventuallyRedrawItem(canvasPtr, itemPtr);
	    }
	    itemPtr->redraw_flags &= ~TK_ITEM_DONT_REDRAW;
	}
























	break;
    }
    case CANV_SCALE: {
	double xOrigin, yOrigin, xScale, yScale;

	if (objc != 7) {
	    Tcl_WrongNumArgs(interp, 2, objv,

static int		CanvasWidgetCmd(ClientData clientData,
			    Tcl_Interp *interp, int argc,
			    Tcl_Obj *const *argv);
static void		CanvasWorldChanged(ClientData instanceData);
static int		ConfigureCanvas(Tcl_Interp *interp,
			    TkCanvas *canvasPtr, int argc,
			    Tcl_Obj *const *argv, int flags);
static void		DefaultRotateImplementation(TkCanvas *canvasPtr,
			    Tk_Item *itemPtr, double x, double y,
			    double angleRadians);
static void		DestroyCanvas(void *memPtr);
static int		DrawCanvas(Tcl_Interp *interp, ClientData clientData, Tk_PhotoHandle photohandle, int subsample, int zoom);
static void		DisplayCanvas(ClientData clientData);
static void		DoItem(Tcl_Obj *accumObj,
			    Tk_Item *itemPtr, Tk_Uid tag);
static void		EventuallyRedrawItem(TkCanvas *canvasPtr,
			    Tk_Item *itemPtr);
................................................................................
    Tk_Item *itemPtr,
    double xDelta,
    double yDelta)
{
    itemPtr->typePtr->translateProc((Tk_Canvas) canvasPtr, itemPtr,
	    xDelta, yDelta);
}

static inline void
ItemRotate(
    TkCanvas *canvasPtr,
    Tk_Item *itemPtr,
    double x,
    double y,
    double angleRadians)
{
    if (itemPtr->typePtr->rotateProc != NULL) {
	itemPtr->typePtr->rotateProc((Tk_Canvas) canvasPtr,
		itemPtr, x, y, angleRadians);
    } else {
	DefaultRotateImplementation(canvasPtr, itemPtr, x, y, angleRadians);
    }
}
 
/*
 *--------------------------------------------------------------
 *
 * DefaultRotateImplementation --
 *
 *	The default implementation of the rotation operation, used when items
 *	do not provide their own version.
 *
 *--------------------------------------------------------------
 */

static void
DefaultRotateImplementation(
    TkCanvas *canvasPtr,
    Tk_Item *itemPtr,
    double x,
    double y,
    double angleRadians)
{
    int objc, i, ok = 1;
    Tcl_Obj **objv, **newObjv;
    double *coordv;
    double s = sin(angleRadians);
    double c = cos(angleRadians);
    Tcl_Interp *interp = canvasPtr->interp;

    /*
     * Get the coordinates out of the item.
     */

    if (ItemCoords(canvasPtr, itemPtr, 0, NULL) == TCL_OK &&
	    Tcl_ListObjGetElements(NULL, Tcl_GetObjResult(interp),
		    &objc, &objv) == TCL_OK) {
	coordv = (double *) Tcl_Alloc(sizeof(double) * objc);
	for (i=0 ; i<objc ; i++) {
	    if (Tcl_GetDoubleFromObj(NULL, objv[i], &coordv[i]) != TCL_OK) {
		ok = 0;
		break;
	    }
	}
	if (ok) {
	    /*
	     * Apply the rotation.
	     */

	    for (i=0 ; i<objc ; i+=2) {
		double px = coordv[i+0] - x;
		double py = coordv[i+1] - y;
		double nx = px * c - py * s;
		double ny = px * s + py * c;

		coordv[i+0] = nx + x;
		coordv[i+1] = ny + y;
	    }

	    /*
	     * Write the coordinates back into the item.
	     */

	    newObjv = (Tcl_Obj **) Tcl_Alloc(sizeof(Tcl_Obj *) * objc);
	    for (i=0 ; i<objc ; i++) {
		newObjv[i] = Tcl_NewDoubleObj(coordv[i]);
		Tcl_IncrRefCount(newObjv[i]);
	    }
	    ItemCoords(canvasPtr, itemPtr, objc, newObjv);
	    for (i=0 ; i<objc ; i++) {
		Tcl_DecrRefCount(newObjv[i]);
	    }
	    Tcl_Free((char *) newObjv);
	}
	Tcl_Free((char *) coordv);
    }

    /*
     * The interpreter result was (probably) modified above; reset it.
     */

    Tcl_ResetResult(interp);
}
 
/*
 *--------------------------------------------------------------
 *
 * Tk_CanvasObjCmd --
 *
 *	This function is invoked to process the "canvas" Tcl command. See the
................................................................................

    int index;
    static const char *const optionStrings[] = {
	"addtag",	"bbox",		"bind",		"canvasx",
	"canvasy",	"cget",		"configure",	"coords",
	"create",	"dchars",	"delete",	"dtag",
	"find",		"focus",	"gettags",	"icursor",

        "image",	"imove",	"index",	"insert",
	"itemcget",	"itemconfigure",
	"lower",	"move",		"moveto",	"postscript",
	"raise",	"rchars",	"rotate",	"scale",
	"scan",		"select",	"type",		"xview",
	"yview",	NULL
    };
    enum options {
	CANV_ADDTAG,	CANV_BBOX,	CANV_BIND,	CANV_CANVASX,
	CANV_CANVASY,	CANV_CGET,	CANV_CONFIGURE,	CANV_COORDS,
	CANV_CREATE,	CANV_DCHARS,	CANV_DELETE,	CANV_DTAG,
	CANV_FIND,	CANV_FOCUS,	CANV_GETTAGS,	CANV_ICURSOR,

        CANV_IMAGE,	CANV_IMOVE,	CANV_INDEX,	CANV_INSERT,
	CANV_ITEMCGET,	CANV_ITEMCONFIGURE,
	CANV_LOWER,	CANV_MOVE,	CANV_MOVETO,	CANV_POSTSCRIPT,
	CANV_RAISE,	CANV_RCHARS,	CANV_ROTATE,	CANV_SCALE,
	CANV_SCAN,	CANV_SELECT,	CANV_TYPE,	CANV_XVIEW,
	CANV_YVIEW
    };

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], optionStrings, "option", 0,
................................................................................
            if (!(dontRedraw1 && dontRedraw2)) {
		Tk_CanvasEventuallyRedraw((Tk_Canvas) canvasPtr,
			x1, y1, x2, y2);
		EventuallyRedrawItem(canvasPtr, itemPtr);
	    }
	    itemPtr->redraw_flags &= ~TK_ITEM_DONT_REDRAW;
	}
	break;
    }
    case CANV_ROTATE: {
	double x, y, angle;
	Tk_Canvas canvas = (Tk_Canvas) canvasPtr;

	if (objc != 6) {
	    Tcl_WrongNumArgs(interp, 2, objv, "tagOrId x y angle");
	    result = TCL_ERROR;
	    goto done;
	}
	if (Tk_CanvasGetCoordFromObj(interp, canvas, objv[3], &x) != TCL_OK ||
		Tk_CanvasGetCoordFromObj(interp, canvas, objv[4], &y) != TCL_OK ||
		Tcl_GetDoubleFromObj(interp, objv[5], &angle) != TCL_OK) {
	    result = TCL_ERROR;
	    goto done;
	}
	angle = angle * 3.1415927 / 180.0;
	FOR_EVERY_CANVAS_ITEM_MATCHING(objv[2], &searchPtr, goto done) {
	    EventuallyRedrawItem(canvasPtr, itemPtr);
	    ItemRotate(canvasPtr, itemPtr, x, y, angle);
	    EventuallyRedrawItem(canvasPtr, itemPtr);
	    canvasPtr->flags |= REPICK_NEEDED;
	}
	break;
    }
    case CANV_SCALE: {
	double xOrigin, yOrigin, xScale, yScale;

	if (objc != 7) {
	    Tcl_WrongNumArgs(interp, 2, objv,

 */

	/* ARGSUSED */
static char *
EntryTextVarProc(
    ClientData clientData,	/* Information about button. */
    Tcl_Interp *interp,		/* Interpreter containing variable. */
    const char *name1,		/* Name of variable. */
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    Entry *entryPtr = clientData;
    const char *value;

    if (entryPtr->flags & ENTRY_DELETED) {
	/*
	 * Just abort early if we entered here while being deleted.
	 */
	return NULL;
    }

    /*
     * See ticket [5d991b82].
     */

    if (entryPtr->textVarName == NULL) {
	if (!(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_UntraceVar2(interp, name1, name2,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    EntryTextVarProc, clientData);
	}
 	return NULL;
     }

    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {




















	    Tcl_SetVar2(interp, entryPtr->textVarName, NULL,
		    entryPtr->string, TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, entryPtr->textVarName, NULL,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    EntryTextVarProc, clientData);
	    entryPtr->flags |= ENTRY_VAR_TRACED;
	}
	return NULL;
    }

    /*
     * Update the entry's text with the value of the variable, unless the
     * entry already has that value (this happens when the variable changes
     * value because we changed it because someone typed in the entry).

 */

	/* ARGSUSED */
static char *
EntryTextVarProc(
    ClientData clientData,	/* Information about button. */
    Tcl_Interp *interp,		/* Interpreter containing variable. */
    const char *name1,		/* Not used. */
    const char *name2,		/* Not used. */
    int flags)			/* Information about what happened. */
{
    Entry *entryPtr = clientData;
    const char *value;

    if (entryPtr->flags & ENTRY_DELETED) {
	/*
	 * Just abort early if we entered here while being deleted.
	 */
	return NULL;
    }














    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
        if (!Tcl_InterpDeleted(interp) && entryPtr->textVarName) {
            ClientData probe = NULL;

            do {
                probe = Tcl_VarTraceInfo(interp,
                        entryPtr->textVarName,
                        TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                        EntryTextVarProc, probe);
                if (probe == (ClientData)entryPtr) {
                    break;
                }
            } while (probe);
            if (probe) {
                /*
                 * We were able to fetch the unset trace for our
                 * textVarName, which means it is not unset and not
                 * the cause of this unset trace. Instead some outdated
                 * former variable must be, and we should ignore it.
                 */
                return NULL;
            }
	    Tcl_SetVar2(interp, entryPtr->textVarName, NULL,
		    entryPtr->string, TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, entryPtr->textVarName, NULL,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    EntryTextVarProc, clientData);
	    entryPtr->flags |= ENTRY_VAR_TRACED;
        }
	return NULL;
    }

    /*
     * Update the entry's text with the value of the variable, unless the
     * entry already has that value (this happens when the variable changes
     * value because we changed it because someone typed in the entry).

/*
 * tkImgSVGnano.c
 *
 *	A photo file handler for SVG files.
 *
 * Copyright (c) 2013-14 Mikko Mononen [email protected]
 * Copyright (c) 2018 Christian Gollwitzer [email protected]
 * Copyright (c) 2018 Rene Zaumseil [email protected]
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * This handler is build using the original nanosvg library files from
 * https://github.com/memononen/nanosvg and the tcl extension files from
 * https://github.com/auriocus/tksvg
 *
 */

#include "tkInt.h"
#define NANOSVG_malloc	ckalloc
#define NANOSVG_realloc	ckrealloc
#define NANOSVG_free	ckfree
#define NANOSVG_SCOPE MODULE_SCOPE
#define NANOSVG_ALL_COLOR_KEYWORDS
#define NANOSVG_IMPLEMENTATION
#include "nanosvg.h"
#define NANOSVGRAST_IMPLEMENTATION
#include "nanosvgrast.h"

/* Additional parameters to nsvgRasterize() */

typedef struct {
    double x;
    double y;
    double scale;
} RastOpts;

/*
 * Per interp cache of last NSVGimage which was matched to
 * be immediately rasterized after the match. This helps to
 * eliminate double parsing of the SVG file/string.
 */

typedef struct {
    ClientData dataOrChan;
    Tcl_DString formatString;
    NSVGimage *nsvgImage;
    RastOpts ropts;
} NSVGcache;

static int		FileMatchSVG(Tcl_Channel chan, const char *fileName,
			    Tcl_Obj *format, int *widthPtr, int *heightPtr,
			    Tcl_Interp *interp);
static int		FileReadSVG(Tcl_Interp *interp, Tcl_Channel chan,
			    const char *fileName, Tcl_Obj *format,
			    Tk_PhotoHandle imageHandle, int destX, int destY,
			    int width, int height, int srcX, int srcY);
static int		StringMatchSVG(Tcl_Obj *dataObj, Tcl_Obj *format,
			    int *widthPtr, int *heightPtr, Tcl_Interp *interp);
static int		StringReadSVG(Tcl_Interp *interp, Tcl_Obj *dataObj,
			    Tcl_Obj *format, Tk_PhotoHandle imageHandle,
			    int destX, int destY, int width, int height,
			    int srcX, int srcY);
static NSVGimage *	ParseSVGWithOptions(Tcl_Interp *interp,
			    const char *input, int length, Tcl_Obj *format,
			    RastOpts *ropts);
static int		RasterizeSVG(Tcl_Interp *interp,
			    Tk_PhotoHandle imageHandle, NSVGimage *nsvgImage,
			    int destX, int destY, int width, int height,
			    int srcX, int srcY, RastOpts *ropts);
static NSVGcache *	GetCachePtr(Tcl_Interp *interp);
static int		CacheSVG(Tcl_Interp *interp, ClientData dataOrChan,
			    Tcl_Obj *formatObj, NSVGimage *nsvgImage,
			    RastOpts *ropts);
static NSVGimage *	GetCachedSVG(Tcl_Interp *interp, ClientData dataOrChan,
			    Tcl_Obj *formatObj, RastOpts *ropts);
static void		CleanCache(Tcl_Interp *interp);
static void		FreeCache(ClientData clientData, Tcl_Interp *interp);

/*
 * The format record for the SVG nano file format:
 */

Tk_PhotoImageFormat tkImgFmtSVGnano = {
    "svg",			/* name */
    FileMatchSVG,		/* fileMatchProc */
    StringMatchSVG,		/* stringMatchProc */
    FileReadSVG,		/* fileReadProc */
    StringReadSVG,		/* stringReadProc */
    NULL,			/* fileWriteProc */
    NULL,			/* stringWriteProc */
    NULL
};

/*
 *----------------------------------------------------------------------
 *
 * FileMatchSVG --
 *
 *	This function is invoked by the photo image type to see if a file
 *	contains image data in SVG format.
 *
 * Results:
 *	The return value is >0 if the file can be successfully parsed,
 *	and 0 otherwise.
 *
 * Side effects:
 *	The file is saved in the internal cache for further use.
 *
 *----------------------------------------------------------------------
 */

static int
FileMatchSVG(
    Tcl_Channel chan,
    const char *fileName,
    Tcl_Obj *formatObj,
    int *widthPtr, int *heightPtr,
    Tcl_Interp *interp)
{
    int length;
    Tcl_Obj *dataObj = Tcl_NewObj();
    const char *data;
    RastOpts ropts;
    NSVGimage *nsvgImage;

    CleanCache(interp);
    if (Tcl_ReadChars(chan, dataObj, -1, 0) == -1) {
	/* in case of an error reading the file */
	Tcl_DecrRefCount(dataObj);
	return 0;
    }
    data = Tcl_GetStringFromObj(dataObj, &length);
    nsvgImage = ParseSVGWithOptions(interp, data, length, formatObj, &ropts);
    Tcl_DecrRefCount(dataObj);
    if (nsvgImage != NULL) {
	*widthPtr = (int) ceil(nsvgImage->width * ropts.scale);
	*heightPtr = (int) ceil(nsvgImage->height * ropts.scale);
        if ((*widthPtr <= 0) || (*heightPtr <= 0)) {
            nsvgDelete(nsvgImage);
            return 0;
        }
	if (!CacheSVG(interp, chan, formatObj, nsvgImage, &ropts)) {
	    nsvgDelete(nsvgImage);
	}
	return 1;
    }
    return 0;
}

/*
 *----------------------------------------------------------------------
 *
 * FileReadSVG --
 *
 *	This function is called by the photo image type to read SVG format
 *	data from a file and write it into a given photo image.
 *
 * Results:
 *	A standard TCL completion code. If TCL_ERROR is returned then an error
 *	message is left in the interp's result.
 *
 * Side effects:
 *	The access position in file f is changed, and new data is added to the
 *	image given by imageHandle.
 *
 *----------------------------------------------------------------------
 */

static int
FileReadSVG(
    Tcl_Interp *interp,
    Tcl_Channel chan,
    const char *fileName,
    Tcl_Obj *formatObj,
    Tk_PhotoHandle imageHandle,
    int destX, int destY,
    int width, int height,
    int srcX, int srcY)
{
    int length;
    const char *data;
    RastOpts ropts;
    NSVGimage *nsvgImage = GetCachedSVG(interp, chan, formatObj, &ropts);

    if (nsvgImage == NULL) {
        Tcl_Obj *dataObj = Tcl_NewObj();

	if (Tcl_ReadChars(chan, dataObj, -1, 0) == -1) {
	    /* in case of an error reading the file */
	    Tcl_DecrRefCount(dataObj);
	    Tcl_SetObjResult(interp, Tcl_NewStringObj("read error", -1));
	    Tcl_SetErrorCode(interp, "TK", "IMAGE", "SVG", "READ_ERROR", NULL);
	    return TCL_ERROR;
	}
        data = Tcl_GetStringFromObj(dataObj, &length);
	nsvgImage = ParseSVGWithOptions(interp, data, length, formatObj,
			    &ropts);
	Tcl_DecrRefCount(dataObj);
	if (nsvgImage == NULL) {
	    return TCL_ERROR;
	}
    }
    return RasterizeSVG(interp, imageHandle, nsvgImage, destX, destY,
		width, height, srcX, srcY, &ropts);
}

/*
 *----------------------------------------------------------------------
 *
 * StringMatchSVG --
 *
 *	This function is invoked by the photo image type to see if a string
 *	contains image data in SVG format.
 *
 * Results:
 *	The return value is >0 if the file can be successfully parsed,
 *	and 0 otherwise.
 *
 * Side effects:
 *	The file is saved in the internal cache for further use.
 *
 *----------------------------------------------------------------------
 */

static int
StringMatchSVG(
    Tcl_Obj *dataObj,
    Tcl_Obj *formatObj,
    int *widthPtr, int *heightPtr,
    Tcl_Interp *interp)
{
    int length;
    const char *data;
    RastOpts ropts;
    NSVGimage *nsvgImage;

    CleanCache(interp);
    data = Tcl_GetStringFromObj(dataObj, &length);
    nsvgImage = ParseSVGWithOptions(interp, data, length, formatObj, &ropts);
    if (nsvgImage != NULL) {
	*widthPtr = (int) ceil(nsvgImage->width * ropts.scale);
	*heightPtr = (int) ceil(nsvgImage->height * ropts.scale);
        if ((*widthPtr <= 0) || (*heightPtr <= 0)) {
            nsvgDelete(nsvgImage);
            return 0;
        }
	if (!CacheSVG(interp, dataObj, formatObj, nsvgImage, &ropts)) {
	    nsvgDelete(nsvgImage);
	}
	return 1;
    }
    return 0;
}

/*
 *----------------------------------------------------------------------
 *
 * StringReadSVG --
 *
 *	This function is called by the photo image type to read SVG format
 *	data from a string and write it into a given photo image.
 *
 * Results:
 *	A standard TCL completion code. If TCL_ERROR is returned then an error
 *	message is left in the interp's result.
 *
 * Side effects:
 *	New data is added to the image given by imageHandle.
 *
 *----------------------------------------------------------------------
 */

static int
StringReadSVG(
    Tcl_Interp *interp,
    Tcl_Obj *dataObj,
    Tcl_Obj *formatObj,
    Tk_PhotoHandle imageHandle,
    int destX, int destY,
    int width, int height,
    int srcX, int srcY)
{
    int length;
    const char *data;
    RastOpts ropts;
    NSVGimage *nsvgImage = GetCachedSVG(interp, dataObj, formatObj, &ropts);

    if (nsvgImage == NULL) {
        data = Tcl_GetStringFromObj(dataObj, &length);
	nsvgImage = ParseSVGWithOptions(interp, data, length, formatObj,
			    &ropts);
    }
    if (nsvgImage == NULL) {
	return TCL_ERROR;
    }
    return RasterizeSVG(interp, imageHandle, nsvgImage, destX, destY,
		width, height, srcX, srcY, &ropts);
}

/*
 *----------------------------------------------------------------------
 *
 * ParseSVGWithOptions --
 *
 *	This function is called to parse the given input string as SVG.
 *
 * Results:
 *	Return a newly create NSVGimage on success, and NULL otherwise.
 *
 * Side effects:
 *
 *----------------------------------------------------------------------
 */

static NSVGimage *
ParseSVGWithOptions(
    Tcl_Interp *interp,
    const char *input,
    int length,
    Tcl_Obj *formatObj,
    RastOpts *ropts)
{
    Tcl_Obj **objv = NULL;
    int objc = 0;
    double dpi = 96.0;
    char unit[3], *p;
    char *inputCopy = NULL;
    NSVGimage *nsvgImage;
    static const char *const fmtOptions[] = {
        "-dpi", "-scale", "-unit", NULL
    };
    enum fmtOptions {
	OPT_DPI, OPT_SCALE, OPT_UNIT
    };

    /*
     * The parser destroys the original input string,
     * therefore first duplicate.
     */

    inputCopy = attemptckalloc(length+1);
    if (inputCopy == NULL) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("cannot alloc data buffer", -1));
	Tcl_SetErrorCode(interp, "TK", "IMAGE", "SVG", "OUT_OF_MEMORY", NULL);
	goto error;
    }
    memcpy(inputCopy, input, length);
    inputCopy[length] = '\0';

    /*
     * Process elements of format specification as a list.
     */

    strcpy(unit, "px");
    ropts->x = ropts->y = 0.0;
    ropts->scale = 1.0;
    if ((formatObj != NULL) &&
	    Tcl_ListObjGetElements(interp, formatObj, &objc, &objv) != TCL_OK) {
        goto error;
    }
    for (; objc > 0 ; objc--, objv++) {
	int optIndex;

	/*
	 * Ignore the "svg" part of the format specification.
	 */

	if (!strcasecmp(Tcl_GetString(objv[0]), "svg")) {
	    continue;
	}

	if (Tcl_GetIndexFromObjStruct(interp, objv[0], fmtOptions,
		sizeof(char *), "option", 0, &optIndex) == TCL_ERROR) {
	    goto error;
	}

	if (objc < 2) {
	    ckfree(inputCopy);
	    inputCopy = NULL;
	    Tcl_WrongNumArgs(interp, 1, objv, "value");
	    goto error;
	}

	objc--;
	objv++;

	switch ((enum fmtOptions) optIndex) {
	case OPT_DPI:
	    if (Tcl_GetDoubleFromObj(interp, objv[0], &dpi) == TCL_ERROR) {
	        goto error;
	    }
	    if (dpi < 0.0) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"-dpi value must be positive", -1));
		Tcl_SetErrorCode(interp, "TK", "IMAGE", "SVG", "BAD_DPI",
			NULL);
		goto error;
	    }
	    break;
	case OPT_SCALE:
	    if (Tcl_GetDoubleFromObj(interp, objv[0], &ropts->scale) ==
		TCL_ERROR) {
	        goto error;
	    }
	    if (ropts->scale <= 0.0) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"-scale value must be positive", -1));
		Tcl_SetErrorCode(interp, "TK", "IMAGE", "SVG", "BAD_SCALE",
			NULL);
		goto error;
	    }
	    break;
	case OPT_UNIT:
	    p = Tcl_GetString(objv[0]);
	    if ((p != NULL) && (p[0])) {
	        strncpy(unit, p, 3);
		unit[2] = '\0';
	    }
	    break;
	}
    }

    nsvgImage = nsvgParse(inputCopy, unit, (float) dpi);
    if (nsvgImage == NULL) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("cannot parse SVG image", -1));
	Tcl_SetErrorCode(interp, "TK", "IMAGE", "SVG", "PARSE_ERROR", NULL);
	goto error;
    }
    ckfree(inputCopy);
    return nsvgImage;

error:
    if (inputCopy != NULL) {
        ckfree(inputCopy);
    }
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * RasterizeSVG --
 *
 *	This function is called to rasterize the given nsvgImage and
 *	fill the imageHandle with data.
 *
 * Results:
 *	A standard TCL completion code. If TCL_ERROR is returned then an error
 *	message is left in the interp's result.
 *
 *
 * Side effects:
 *	On error the given nsvgImage will be deleted.
 *
 *----------------------------------------------------------------------
 */

static int
RasterizeSVG(
    Tcl_Interp *interp,
    Tk_PhotoHandle imageHandle,
    NSVGimage *nsvgImage,
    int destX, int destY,
    int width, int height,
    int srcX, int srcY,
    RastOpts *ropts)
{
    int w, h, c;
    NSVGrasterizer *rast;
    unsigned char *imgData;
    Tk_PhotoImageBlock svgblock;

    w = (int) ceil(nsvgImage->width * ropts->scale);
    h = (int) ceil(nsvgImage->height * ropts->scale);
    rast = nsvgCreateRasterizer();
    if (rast == NULL) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("cannot initialize rasterizer", -1));
	Tcl_SetErrorCode(interp, "TK", "IMAGE", "SVG", "RASTERIZER_ERROR",
		NULL);
	goto cleanAST;
    }
    imgData = attemptckalloc(w * h *4);
    if (imgData == NULL) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("cannot alloc image buffer", -1));
	Tcl_SetErrorCode(interp, "TK", "IMAGE", "SVG", "OUT_OF_MEMORY", NULL);
	goto cleanRAST;
    }
    nsvgRasterize(rast, nsvgImage, (float) ropts->x, (float) ropts->y,
	    (float) ropts->scale, imgData, w, h, w * 4);
    /* transfer the data to a photo block */
    svgblock.pixelPtr = imgData;
    svgblock.width = w;
    svgblock.height = h;
    svgblock.pitch = w * 4;
    svgblock.pixelSize = 4;
    for (c = 0; c <= 3; c++) {
	svgblock.offset[c] = c;
    }
    if (Tk_PhotoExpand(interp, imageHandle,
		destX + width, destY + height) != TCL_OK) {
	goto cleanRAST;
    }
    if (Tk_PhotoPutBlock(interp, imageHandle, &svgblock, destX, destY,
		width, height, TK_PHOTO_COMPOSITE_SET) != TCL_OK) {
	goto cleanimg;
    }
    ckfree(imgData);
    nsvgDeleteRasterizer(rast);
    nsvgDelete(nsvgImage);
    return TCL_OK;

cleanimg:
    ckfree(imgData);

cleanRAST:
    nsvgDeleteRasterizer(rast);

cleanAST:
    nsvgDelete(nsvgImage);
    return TCL_ERROR;
}

/*
 *----------------------------------------------------------------------
 *
 * GetCachePtr --
 *
 *	This function is called to get the per interpreter used
 *	svg image cache.
 *
 * Results:
 * 	Return a pointer to the used cache.
 *
 * Side effects:
 *	Initialize the cache on the first call.
 *
 *----------------------------------------------------------------------
 */

static NSVGcache *
GetCachePtr(
    Tcl_Interp *interp
) {
    NSVGcache *cachePtr = Tcl_GetAssocData(interp, "tksvgnano", NULL);
    if (cachePtr == NULL) {
	cachePtr = ckalloc(sizeof(NSVGcache));
	cachePtr->dataOrChan = NULL;
	Tcl_DStringInit(&cachePtr->formatString);
	cachePtr->nsvgImage = NULL;
	Tcl_SetAssocData(interp, "tksvgnano", FreeCache, cachePtr);
    }
    return cachePtr;
}

/*
 *----------------------------------------------------------------------
 *
 * CacheSVG --
 *
 *	Add the given svg image informations to the cache for further usage.
 *
 * Results:
 *	Return 1 on success, and 0 otherwise.
 *
 * Side effects:
 *
 *----------------------------------------------------------------------
 */

static int
CacheSVG(
    Tcl_Interp *interp,
    ClientData dataOrChan,
    Tcl_Obj *formatObj,
    NSVGimage *nsvgImage,
    RastOpts *ropts)
{
    int length;
    const char *data;
    NSVGcache *cachePtr = GetCachePtr(interp);

    if (cachePtr != NULL) {
        cachePtr->dataOrChan = dataOrChan;
	if (formatObj != NULL) {
	    data = Tcl_GetStringFromObj(formatObj, &length);
	    Tcl_DStringAppend(&cachePtr->formatString, data, length);
	}
	cachePtr->nsvgImage = nsvgImage;
	cachePtr->ropts = *ropts;
	return 1;
    }
    return 0;
}

/*
 *----------------------------------------------------------------------
 *
 * GetCachedSVG --
 *
 *	Try to get the NSVGimage from the internal cache.
 *
 * Results:
 *	Return the found NSVGimage on success, and NULL otherwise.
 *
 * Side effects:
 *	Calls the CleanCache() function.
 *
 *----------------------------------------------------------------------
 */

static NSVGimage *
GetCachedSVG(
    Tcl_Interp *interp,
    ClientData dataOrChan,
    Tcl_Obj *formatObj,
    RastOpts *ropts)
{
    int length;
    const char *data;
    NSVGcache *cachePtr = GetCachePtr(interp);
    NSVGimage *nsvgImage = NULL;

    if ((cachePtr != NULL) && (cachePtr->nsvgImage != NULL) &&
	(cachePtr->dataOrChan == dataOrChan)) {
        if (formatObj != NULL) {
	    data = Tcl_GetStringFromObj(formatObj, &length);
	    if (strcmp(data, Tcl_DStringValue(&cachePtr->formatString)) == 0) {
	        nsvgImage = cachePtr->nsvgImage;
		*ropts = cachePtr->ropts;
		cachePtr->nsvgImage = NULL;
	    }
	} else if (Tcl_DStringLength(&cachePtr->formatString) == 0) {
	    nsvgImage = cachePtr->nsvgImage;
	    *ropts = cachePtr->ropts;
	    cachePtr->nsvgImage = NULL;
	}
    }
    CleanCache(interp);
    return nsvgImage;
}

/*
 *----------------------------------------------------------------------
 *
 * CleanCache --
 *
 *	Reset the cache and delete the saved image in it.
 *
 * Results:
 *
 * Side effects:
 *
 *----------------------------------------------------------------------
 */

static void
CleanCache(Tcl_Interp *interp)
{
    NSVGcache *cachePtr = GetCachePtr(interp);

    if (cachePtr != NULL) {
        cachePtr->dataOrChan = NULL;
        Tcl_DStringSetLength(&cachePtr->formatString, 0);
	if (cachePtr->nsvgImage != NULL) {
	    nsvgDelete(cachePtr->nsvgImage);
	    cachePtr->nsvgImage = NULL;
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * FreeCache --
 *
 *	This function is called to clean up the internal cache data.
 *
 * Results:
 *
 * Side effects:
 *	Existing image data in the cache and the cache will be deleted.
 *
 *----------------------------------------------------------------------
 */

static void
FreeCache(ClientData clientData, Tcl_Interp *interp)
{
    NSVGcache *cachePtr = clientData;

    Tcl_DStringFree(&cachePtr->formatString);
    if (cachePtr->nsvgImage != NULL) {
        nsvgDelete(cachePtr->nsvgImage);
    }
    ckfree(cachePtr);
}

MODULE_SCOPE const Tk_SmoothMethod tkBezierSmoothMethod;
MODULE_SCOPE Tk_ImageType	tkBitmapImageType;
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtGIF;
MODULE_SCOPE void		(*tkHandleEventProc) (XEvent* eventPtr);
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtDefault;
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtPNG;
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtPPM;

MODULE_SCOPE TkMainInfo		*tkMainWindowList;
MODULE_SCOPE Tk_ImageType	tkPhotoImageType;
MODULE_SCOPE Tcl_HashTable	tkPredefBitmapTable;

MODULE_SCOPE const char *const tkWebColors[20];

/*
................................................................................
MODULE_SCOPE Tcl_Command TkMakeEnsemble(Tcl_Interp *interp,
			    const char *nsname, const char *name,
			    ClientData clientData, const TkEnsemble *map);
MODULE_SCOPE int	TkInitTkCmd(Tcl_Interp *interp,
			    ClientData clientData);
MODULE_SCOPE int	TkInitFontchooser(Tcl_Interp *interp,
			    ClientData clientData);


MODULE_SCOPE void	TkpWarpPointer(TkDisplay *dispPtr);
MODULE_SCOPE void	TkpCancelWarp(TkDisplay *dispPtr);
MODULE_SCOPE int	TkListCreateFrame(ClientData clientData,
			    Tcl_Interp *interp, Tcl_Obj *listObj,
			    int toplevel, Tcl_Obj *nameObj);




#ifdef _WIN32
#define TkParseColor XParseColor
#else
MODULE_SCOPE Status TkParseColor (Display * display,
				Colormap map, const char* spec,
				XColor * colorPtr);

MODULE_SCOPE const Tk_SmoothMethod tkBezierSmoothMethod;
MODULE_SCOPE Tk_ImageType	tkBitmapImageType;
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtGIF;
MODULE_SCOPE void		(*tkHandleEventProc) (XEvent* eventPtr);
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtDefault;
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtPNG;
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtPPM;
MODULE_SCOPE Tk_PhotoImageFormat tkImgFmtSVGnano;
MODULE_SCOPE TkMainInfo		*tkMainWindowList;
MODULE_SCOPE Tk_ImageType	tkPhotoImageType;
MODULE_SCOPE Tcl_HashTable	tkPredefBitmapTable;

MODULE_SCOPE const char *const tkWebColors[20];

/*
................................................................................
MODULE_SCOPE Tcl_Command TkMakeEnsemble(Tcl_Interp *interp,
			    const char *nsname, const char *name,
			    ClientData clientData, const TkEnsemble *map);
MODULE_SCOPE int	TkInitTkCmd(Tcl_Interp *interp,
			    ClientData clientData);
MODULE_SCOPE int	TkInitFontchooser(Tcl_Interp *interp,
			    ClientData clientData);
MODULE_SCOPE void	TkInitEmbeddedConfigurationInformation(
			    Tcl_Interp *interp);
MODULE_SCOPE void	TkpWarpPointer(TkDisplay *dispPtr);
MODULE_SCOPE void	TkpCancelWarp(TkDisplay *dispPtr);
MODULE_SCOPE int	TkListCreateFrame(ClientData clientData,
			    Tcl_Interp *interp, Tcl_Obj *listObj,
			    int toplevel, Tcl_Obj *nameObj);
MODULE_SCOPE void	TkRotatePoint(double originX, double originY,
			    double sine, double cosine, double *xPtr,
			    double *yPtr);

#ifdef _WIN32
#define TkParseColor XParseColor
#else
MODULE_SCOPE Status TkParseColor (Display * display,
				Colormap map, const char* spec,
				XColor * colorPtr);

 *----------------------------------------------------------------------
 */

static char *
ListboxListVarProc(
    ClientData clientData,	/* Information about button. */
    Tcl_Interp *interp,		/* Interpreter containing variable. */
    const char *name1,		/* Name of variable. */
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    Listbox *listPtr = clientData;
    Tcl_Obj *oldListObj, *varListObj;
    int oldLength, i;
    Tcl_HashEntry *entry;

    /*
     * See ticket [5d991b82].
     */

    if (listPtr->listVarName == NULL) {
	if (!(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_UntraceVar2(interp, name1, name2,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ListboxListVarProc, clientData);
	}
	return NULL;
    }

    /*
     * Bwah hahahaha! Puny mortal, you can't unset a -listvar'd variable!
     */

    if (flags & TCL_TRACE_UNSETS) {
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {






















	    Tcl_SetVar2Ex(interp, listPtr->listVarName, NULL,
		    listPtr->listObj, TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, listPtr->listVarName,
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ListboxListVarProc, clientData);
	    return NULL;
	}

 *----------------------------------------------------------------------
 */

static char *
ListboxListVarProc(
    ClientData clientData,	/* Information about button. */
    Tcl_Interp *interp,		/* Interpreter containing variable. */
    const char *name1,		/* Not used. */
    const char *name2,		/* Not used. */
    int flags)			/* Information about what happened. */
{
    Listbox *listPtr = clientData;
    Tcl_Obj *oldListObj, *varListObj;
    int oldLength, i;
    Tcl_HashEntry *entry;














    /*
     * Bwah hahahaha! Puny mortal, you can't unset a -listvar'd variable!
     */

    if (flags & TCL_TRACE_UNSETS) {


        if (!Tcl_InterpDeleted(interp) && listPtr->listVarName) {
            ClientData probe = NULL;

            do {
                probe = Tcl_VarTraceInfo(interp,
                        listPtr->listVarName,
                        TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                        ListboxListVarProc, probe);
                if (probe == (ClientData)listPtr) {
                    break;
                }
            } while (probe);
            if (probe) {
                /*
                 * We were able to fetch the unset trace for our
                 * listVarName, which means it is not unset and not
                 * the cause of this unset trace. Instead some outdated
                 * former variable must be, and we should ignore it.
                 */
                return NULL;
            }
	    Tcl_SetVar2Ex(interp, listPtr->listVarName, NULL,
		    listPtr->listObj, TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, listPtr->listVarName,
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ListboxListVarProc, clientData);
	    return NULL;
	}

    int flags)			/* Describes what just happened. */
{
    TkMenuEntry *mePtr = clientData;
    TkMenu *menuPtr;
    const char *value;
    const char *name, *onValue;

    if (flags & TCL_INTERP_DESTROYED) {
	/*
	 * Do nothing if the interpreter is going away.

	 */

    	return NULL;
    }

    menuPtr = mePtr->menuPtr;

    if (menuPtr->menuFlags & MENU_DELETION_PENDING) {
    	return NULL;
    }

    /*
     * See ticket [5d991b82].
     */

    if (mePtr->namePtr == NULL) {
	Tcl_UntraceVar2(interp, name1, name2,
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		MenuVarProc, clientData);
	return NULL;
     }

    name = Tcl_GetString(mePtr->namePtr);

    /*
     * If the variable is being unset, then re-establish the trace.
     */

    if (flags & TCL_TRACE_UNSETS) {

	mePtr->entryFlags &= ~ENTRY_SELECTED;
	if (flags & TCL_TRACE_DESTROYED) {


	    Tcl_TraceVar2(interp, name, NULL,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    MenuVarProc, clientData);


	}













	TkpConfigureMenuEntry(mePtr);
	TkEventuallyRedrawMenu(menuPtr, NULL);
	return NULL;
    }

    /*
     * Use the value of the variable to update the selected status of the menu

    int flags)			/* Describes what just happened. */
{
    TkMenuEntry *mePtr = clientData;
    TkMenu *menuPtr;
    const char *value;
    const char *name, *onValue;

    if (Tcl_InterpDeleted(interp) || (mePtr->namePtr == NULL)) {
	/*
	 * Do nothing if the interpreter is going away or we have
	 * no variable name.
	 */

    	return NULL;
    }

    menuPtr = mePtr->menuPtr;

    if (menuPtr->menuFlags & MENU_DELETION_PENDING) {
    	return NULL;
    }












    name = Tcl_GetString(mePtr->namePtr);

    /*
     * If the variable is being unset, then re-establish the trace.
     */

    if (flags & TCL_TRACE_UNSETS) {
        ClientData probe = NULL;
	mePtr->entryFlags &= ~ENTRY_SELECTED;


        do {
                probe = Tcl_VarTraceInfo(interp, name,
                        TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                        MenuVarProc, probe);
                if (probe == (ClientData)mePtr) {
                    break;
                }
        } while (probe);
        if (probe) {
                /*
                 * We were able to fetch the unset trace for our
                 * namePtr, which means it is not unset and not
                 * the cause of this unset trace. Instead some outdated
                 * former variable must be, and we should ignore it.
                 */
		return NULL;
        }
	Tcl_TraceVar2(interp, name, NULL,
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		MenuVarProc, clientData);
	TkpConfigureMenuEntry(mePtr);
	TkEventuallyRedrawMenu(menuPtr, NULL);
	return NULL;
    }

    /*
     * Use the value of the variable to update the selected status of the menu

 *	Arrange for an entry of a menu, or the whole menu, to be redisplayed
 *	at some point in the future.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	A when-idle hander is scheduled to do the redisplay, if there isn't
 *	one already scheduled.
 *
 *----------------------------------------------------------------------
 */

void
TkEventuallyRedrawMenu(

 *	Arrange for an entry of a menu, or the whole menu, to be redisplayed
 *	at some point in the future.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	A when-idle handler is scheduled to do the redisplay, if there isn't
 *	one already scheduled.
 *
 *----------------------------------------------------------------------
 */

void
TkEventuallyRedrawMenu(

    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    register TkMenuButton *mbPtr = clientData;
    const char *value;
    unsigned len;

    /*
     * See ticket [5d991b82].
     */

    if (mbPtr->textVarName == NULL) {
	if (!(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_UntraceVar2(interp, name1, name2,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    MenuButtonTextVarProc, clientData);
	}
	return NULL;
    }

    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {




















	    Tcl_SetVar2(interp, mbPtr->textVarName, NULL, mbPtr->text,
		    TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, mbPtr->textVarName, NULL,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    MenuButtonTextVarProc, clientData);
	}
	return NULL;

    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    register TkMenuButton *mbPtr = clientData;
    const char *value;
    unsigned len;














    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
        if (!Tcl_InterpDeleted(interp) && mbPtr->textVarName) {
            ClientData probe = NULL;

            do {
                probe = Tcl_VarTraceInfo(interp,
                        mbPtr->textVarName,
                        TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                        MenuButtonTextVarProc, probe);
                if (probe == (ClientData)mbPtr) {
                    break;
                }
            } while (probe);
            if (probe) {
                /*
                 * We were able to fetch the unset trace for our
                 * textVarName, which means it is not unset and not
                 * the cause of this unset trace. Instead some outdated
                 * former variable must be, and we should ignore it.
                 */
                return NULL;
            }
	    Tcl_SetVar2(interp, mbPtr->textVarName, NULL, mbPtr->text,
		    TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, mbPtr->textVarName, NULL,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    MenuButtonTextVarProc, clientData);
	}
	return NULL;

    const char *name1,		/* Name of variable. */
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    register Message *msgPtr = clientData;
    const char *value;

    /*
     * See ticket [5d991b82].
     */

    if (msgPtr->textVarName == NULL) {
	if (!(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_UntraceVar2(interp, name1, name2,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    MessageTextVarProc, clientData);
	}
	return NULL;
    }

    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {




















	    Tcl_SetVar2(interp, msgPtr->textVarName, NULL, msgPtr->string,
		    TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, msgPtr->textVarName, NULL,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    MessageTextVarProc, clientData);
	}
	return NULL;

    const char *name1,		/* Name of variable. */
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    register Message *msgPtr = clientData;
    const char *value;














    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
        if (!Tcl_InterpDeleted(interp) && msgPtr->textVarName) {
            ClientData probe = NULL;

            do {
                probe = Tcl_VarTraceInfo(interp,
                        msgPtr->textVarName,
                        TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                        MessageTextVarProc, probe);
                if (probe == (ClientData)msgPtr) {
                    break;
                }
            } while (probe);
            if (probe) {
                /*
                 * We were able to fetch the unset trace for our
                 * textVarName, which means it is not unset and not
                 * the cause of this unset trace. Instead some outdated
                 * former variable must be, and we should ignore it.
                 */
                return NULL;
            }
	    Tcl_SetVar2(interp, msgPtr->textVarName, NULL, msgPtr->string,
		    TCL_GLOBAL_ONLY);
	    Tcl_TraceVar2(interp, msgPtr->textVarName, NULL,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    MessageTextVarProc, clientData);
	}
	return NULL;

/*
 * tkPkgConfig.c --
 *
 *	This file contains the configuration information to embed into the tcl
 *	binary library.
 *
 * Copyright (c) 2002 Andreas Kupries <[email protected]>
 * Copyright (c) 2017 Stuart Cassoff <[email protected]>
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

/* Note, the definitions in this module are influenced by the following C
 * preprocessor macros:
 *
 * OSCMa  = shortcut for "old style configuration macro activates"
 * NSCMdt = shortcut for "new style configuration macro declares that"
 *
 * - TCL_THREADS		OSCMa compilation as threaded.
 * - TCL_MEM_DEBUG		OSCMa memory debugging.
 *
 * - TCL_CFG_DO64BIT		NSCMdt tk is compiled for a 64bit system.
 * - NDEBUG			NSCMdt tk is compiled with symbol info off.
 * - TCL_CFG_OPTIMIZED		NSCMdt tk is compiled with cc optimizations on
 * - TCL_CFG_PROFILED		NSCMdt tk is compiled with profiling info.
 *
 * - _WIN32 || __CYGWIN__	The value for the fontsytem key will be
 *   MAC_OSX_TK			chosen based on these macros/defines.
 *   HAVE_XFT			NSCMdt xft font support was requested.
 *
 * - CFG_RUNTIME_*		Paths to various stuff at runtime.
 * - CFG_INSTALL_*		Paths to various stuff at installation time.
 *
 * - TCL_CFGVAL_ENCODING	string containing the encoding used for the
 *				configuration values.
 */

#include "tkInt.h"
 

#ifndef TCL_CFGVAL_ENCODING
#define TCL_CFGVAL_ENCODING "ascii"
#endif

/*
 * Use C preprocessor statements to define the various values for the embedded
 * configuration information.
 */

#ifdef TCL_THREADS
#  define  CFG_THREADED		"1"
#else
#  define  CFG_THREADED		"0"
#endif

#ifdef TCL_MEM_DEBUG
#  define CFG_MEMDEBUG		"1"
#else
#  define CFG_MEMDEBUG		"0"
#endif

#ifdef TCL_CFG_DO64BIT
#  define CFG_64		"1"
#else
#  define CFG_64		"0"
#endif

#ifndef NDEBUG
#  define CFG_DEBUG		"1"
#else
#  define CFG_DEBUG		"0"
#endif

#ifdef TCL_CFG_OPTIMIZED
#  define CFG_OPTIMIZED		"1"
#else
#  define CFG_OPTIMIZED		"0"
#endif

#ifdef TCL_CFG_PROFILED
#  define CFG_PROFILED		"1"
#else
#  define CFG_PROFILED		"0"
#endif

#if defined(_WIN32) || defined(__CYGWIN__)
#  define CFG_FONTSYSTEM	"gdi"
#elif defined(MAC_OSX_TK)
#  define CFG_FONTSYSTEM	"cocoa"
#elif defined(HAVE_XFT)
#  define CFG_FONTSYSTEM	"xft"
#else
#  define CFG_FONTSYSTEM	"x11"
#endif

static Tcl_Config const cfg[] = {
    {"debug",			CFG_DEBUG},
    {"threaded",		CFG_THREADED},
    {"profiled",		CFG_PROFILED},
    {"64bit",			CFG_64},
    {"optimized",		CFG_OPTIMIZED},
    {"mem_debug",		CFG_MEMDEBUG},
    {"fontsystem",		CFG_FONTSYSTEM},

    /* Runtime paths to various stuff */

#ifdef CFG_RUNTIME_LIBDIR
    {"libdir,runtime",		CFG_RUNTIME_LIBDIR},
#endif
#ifdef CFG_RUNTIME_BINDIR
    {"bindir,runtime",		CFG_RUNTIME_BINDIR},
#endif
#ifdef CFG_RUNTIME_SCRDIR
    {"scriptdir,runtime",	CFG_RUNTIME_SCRDIR},
#endif
#ifdef CFG_RUNTIME_INCDIR
    {"includedir,runtime",	CFG_RUNTIME_INCDIR},
#endif
#ifdef CFG_RUNTIME_DOCDIR
    {"docdir,runtime",		CFG_RUNTIME_DOCDIR},
#endif
#ifdef CFG_RUNTIME_DEMODIR
    {"demodir,runtime",		CFG_RUNTIME_DEMODIR},
#endif

    /* Installation paths to various stuff */

#ifdef CFG_INSTALL_LIBDIR
    {"libdir,install",		CFG_INSTALL_LIBDIR},
#endif
#ifdef CFG_INSTALL_BINDIR
    {"bindir,install",		CFG_INSTALL_BINDIR},
#endif
#ifdef CFG_INSTALL_SCRDIR
    {"scriptdir,install",	CFG_INSTALL_SCRDIR},
#endif
#ifdef CFG_INSTALL_INCDIR
    {"includedir,install",	CFG_INSTALL_INCDIR},
#endif
#ifdef CFG_INSTALL_DOCDIR
    {"docdir,install",		CFG_INSTALL_DOCDIR},
#endif
#ifdef CFG_INSTALL_DEMODIR
    {"demodir,install",		CFG_INSTALL_DEMODIR},
#endif

    /* Last entry, closes the array */
    {NULL, NULL}
};
 
void
TkInitEmbeddedConfigurationInformation(
    Tcl_Interp *interp)		/* Interpreter the configuration command is
				 * registered in. */
{
    Tcl_RegisterConfig(interp, "tk", cfg, TCL_CFGVAL_ENCODING);
}
 
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

	if (slavePtr->tkwin == tkwin) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "can't place %s relative to itself",
		    Tk_PathName(slavePtr->tkwin)));
	    Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "LOOP", NULL);
	    goto error;
	}
	
	/*
	 * Check for management loops.
	 */

	for (master = (TkWindow *)tkwin; master != NULL;
	     master = (TkWindow *)TkGetGeomMaster(master)) {
	    if (master == (TkWindow *)slavePtr->tkwin) {

	if (slavePtr->tkwin == tkwin) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "can't place %s relative to itself",
		    Tk_PathName(slavePtr->tkwin)));
	    Tcl_SetErrorCode(interp, "TK", "GEOMETRY", "LOOP", NULL);
	    goto error;
	}

	/*
	 * Check for management loops.
	 */

	for (master = (TkWindow *)tkwin; master != NULL;
	     master = (TkWindow *)TkGetGeomMaster(master)) {
	    if (master == (TkWindow *)slavePtr->tkwin) {

			    Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[]);
static int		RectOvalToPostscript(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
static int		RectToArea(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double *areaPtr);
static double		RectToPoint(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double *pointPtr);


static void		ScaleRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double deltaX, double deltaY);

/*
................................................................................
    TranslateRectOval,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */

    NULL, 0, NULL, NULL
};

Tk_ItemType tkOvalType = {
    "oval",			/* name */
    sizeof(RectOvalItem),	/* itemSize */
    CreateRectOval,		/* createProc */
    configSpecs,		/* configSpecs */
................................................................................
    TranslateRectOval,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* cursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */

    NULL, 0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * CreateRectOval --
 *
................................................................................
		&& ((xDelta2 + yDelta1) < 1.0)
		&& ((xDelta2 + yDelta2) < 1.0)) {
	    return -1;
	}
    }
    return result;
}



















































 
/*
 *--------------------------------------------------------------
 *
 * ScaleRectOval --
 *
 *	This function is invoked to rescale a rectangle or oval item.

			    Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[]);
static int		RectOvalToPostscript(Tcl_Interp *interp,
			    Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
static int		RectToArea(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double *areaPtr);
static double		RectToPoint(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double *pointPtr);
static void		RotateRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY, double angleRad);
static void		ScaleRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double originX, double originY,
			    double scaleX, double scaleY);
static void		TranslateRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
			    double deltaX, double deltaY);

/*
................................................................................
    TranslateRectOval,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* icursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */
    RotateRectOval,		/* rotateProc */
    0, NULL, NULL
};

Tk_ItemType tkOvalType = {
    "oval",			/* name */
    sizeof(RectOvalItem),	/* itemSize */
    CreateRectOval,		/* createProc */
    configSpecs,		/* configSpecs */
................................................................................
    TranslateRectOval,		/* translateProc */
    NULL,			/* indexProc */
    NULL,			/* cursorProc */
    NULL,			/* selectionProc */
    NULL,			/* insertProc */
    NULL,			/* dTextProc */
    NULL,			/* nextPtr */
    RotateRectOval,		/* rotateProc */
    0, NULL, NULL
};
 
/*
 *--------------------------------------------------------------
 *
 * CreateRectOval --
 *
................................................................................
		&& ((xDelta2 + yDelta1) < 1.0)
		&& ((xDelta2 + yDelta2) < 1.0)) {
	    return -1;
	}
    }
    return result;
}
 
/*
 *--------------------------------------------------------------
 *
 * RotateRectOval --
 *
 *	This function is invoked to rotate a rectangle or oval item's
 *	coordinates. It works by rotating a computed point in the centre of
 *	the bounding box, NOT by rotating the corners of the bounding box.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The position of the rectangle or oval is rotated by angleRad about
 *	(originX, originY), and the bounding box is updated in the generic
 *	part of the item structure.
 *
 *--------------------------------------------------------------
 */

static void
RotateRectOval(
    Tk_Canvas canvas,		/* Canvas containing rectangle. */
    Tk_Item *itemPtr,		/* Rectangle to be scaled. */
    double originX, double originY,
				/* Origin about which to rotate rect. */
    double angleRad)		/* Amount to scale in X direction. */
{
    RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
    double newX, newY, oldX, oldY;

    /*
     * Compute the centre of the box, then rotate that about the origin.
     */

    newX = oldX = (rectOvalPtr->bbox[0] + rectOvalPtr->bbox[2]) / 2.0;
    newY = oldY = (rectOvalPtr->bbox[1] + rectOvalPtr->bbox[3]) / 2.0;
    TkRotatePoint(originX, originY, sin(angleRad), cos(angleRad),
	    &newX, &newY);

    /*
     * Apply the translation to the box.
     */

    rectOvalPtr->bbox[0] += newX - oldX;
    rectOvalPtr->bbox[1] += newY - oldY;
    rectOvalPtr->bbox[2] += newX - oldX;
    rectOvalPtr->bbox[3] += newY - oldY;
    ComputeRectOvalBbox(canvas, rectOvalPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * ScaleRectOval --
 *
 *	This function is invoked to rescale a rectangle or oval item.

{
    register TkScale *scalePtr = clientData;
    const char *resultStr;
    double value;
    Tcl_Obj *valuePtr;
    int result;

    /*
     * See ticket [5d991b82].
     */

    if (scalePtr->varNamePtr == NULL) {
	if (!(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_UntraceVar2(interp, name1, name2,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ScaleVarProc, clientData);
	}
	return NULL;
    }

    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {




















	    Tcl_TraceVar2(interp, Tcl_GetString(scalePtr->varNamePtr),
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ScaleVarProc, clientData);
	    scalePtr->flags |= NEVER_SET;
	    TkScaleSetValue(scalePtr, scalePtr->value, 1, 0);
	}
	return NULL;

{
    register TkScale *scalePtr = clientData;
    const char *resultStr;
    double value;
    Tcl_Obj *valuePtr;
    int result;














    /*
     * If the variable is unset, then immediately recreate it unless the whole
     * interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
        if (!Tcl_InterpDeleted(interp) && scalePtr->varNamePtr) {
            ClientData probe = NULL;

            do {
                probe = Tcl_VarTraceInfo(interp,
                        Tcl_GetString(scalePtr->varNamePtr),
                        TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                        ScaleVarProc, probe);
                if (probe == (ClientData)scalePtr) {
                    break;
                }
            } while (probe);
            if (probe) {
                /*
                 * We were able to fetch the unset trace for our
                 * varNamePtr, which means it is not unset and not
                 * the cause of this unset trace. Instead some outdated
                 * former variable must be, and we should ignore it.
                 */
                return NULL;
            }
	    Tcl_TraceVar2(interp, Tcl_GetString(scalePtr->varNamePtr),
		    NULL, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ScaleVarProc, clientData);
	    scalePtr->flags |= NEVER_SET;
	    TkScaleSetValue(scalePtr, scalePtr->value, 1, 0);
	}
	return NULL;

    const TkTextIndex *index2Ptr)
				/* Index describing second location. */
{
    TkUndoSubAtom *iAtom, *dAtom;
    int canUndo, canRedo;
    char lMarkName[20] = "tk::undoMarkL";
    char rMarkName[20] = "tk::undoMarkR";
    char stringUndoMarkId[7] = "";

    /*
     * Create the helpers.
     */

    Tcl_Obj *seeInsertObj = Tcl_NewObj();
    Tcl_Obj *markSet1InsertObj = Tcl_NewObj();

    const TkTextIndex *index2Ptr)
				/* Index describing second location. */
{
    TkUndoSubAtom *iAtom, *dAtom;
    int canUndo, canRedo;
    char lMarkName[20] = "tk::undoMarkL";
    char rMarkName[20] = "tk::undoMarkR";
    char stringUndoMarkId[16] = "";

    /*
     * Create the helpers.
     */

    Tcl_Obj *seeInsertObj = Tcl_NewObj();
    Tcl_Obj *markSet1InsertObj = Tcl_NewObj();

	 * Create built-in photo image formats.
	 */

        Tk_CreatePhotoImageFormat(&tkImgFmtDefault);
	Tk_CreatePhotoImageFormat(&tkImgFmtGIF);
	Tk_CreatePhotoImageFormat(&tkImgFmtPNG);
	Tk_CreatePhotoImageFormat(&tkImgFmtPPM);

    }

    if ((parent != NULL) && (screenName != NULL) && (screenName[0] == '\0')) {
	dispPtr = ((TkWindow *) parent)->dispPtr;
	screenId = Tk_ScreenNumber(parent);
    } else {
	dispPtr = GetScreen(interp, screenName, &screenId);
................................................................................
     * Ensure that we are getting a compatible version of Tcl.
     */

    if (Tcl_InitStubs(interp, "8.6-", 0) == NULL) {
	return TCL_ERROR;
    }







    /*
     * Ensure that our obj-types are registered with the Tcl runtime.
     */

    TkRegisterObjTypes();

    tsdPtr = Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

	 * Create built-in photo image formats.
	 */

        Tk_CreatePhotoImageFormat(&tkImgFmtDefault);
	Tk_CreatePhotoImageFormat(&tkImgFmtGIF);
	Tk_CreatePhotoImageFormat(&tkImgFmtPNG);
	Tk_CreatePhotoImageFormat(&tkImgFmtPPM);
	Tk_CreatePhotoImageFormat(&tkImgFmtSVGnano);
    }

    if ((parent != NULL) && (screenName != NULL) && (screenName[0] == '\0')) {
	dispPtr = ((TkWindow *) parent)->dispPtr;
	screenId = Tk_ScreenNumber(parent);
    } else {
	dispPtr = GetScreen(interp, screenName, &screenId);
................................................................................
     * Ensure that we are getting a compatible version of Tcl.
     */

    if (Tcl_InitStubs(interp, "8.6-", 0) == NULL) {
	return TCL_ERROR;
    }

    /*
     * TIP #59: Make embedded configuration information available.
     */

    TkInitEmbeddedConfigurationInformation(interp);

    /*
     * Ensure that our obj-types are registered with the Tcl runtime.
     */

    TkRegisterObjTypes();

    tsdPtr = Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

static int EntryConfigure(Tcl_Interp *interp, void *recordPtr, int mask)
{
    Entry *entryPtr = recordPtr;
    Tcl_Obj *textVarName = entryPtr->entry.textVariableObj;
    Ttk_TraceHandle *vt = 0;

    if (mask & TEXTVAR_CHANGED) {
	if (textVarName && *Tcl_GetString(textVarName)) {
	    vt = Ttk_TraceVariable(interp,
		    textVarName,EntryTextVariableTrace,entryPtr);
	    if (!vt) return TCL_ERROR;
	}
    }

    if (TtkCoreConfigure(interp, recordPtr, mask) != TCL_OK) {
................................................................................
	if (x > maxWidth) {
	    x = maxWidth;
	    roundUp = 1;
	}
	*indexPtr = Tk_PointToChar(entryPtr->entry.textLayout,
		x - entryPtr->entry.layoutX, 0);


	if (*indexPtr < entryPtr->entry.xscroll.first) {
	    *indexPtr = entryPtr->entry.xscroll.first;
	}

	/*
	 * Special trick:  if the x-position was off-screen to the right,
	 * round the index up to refer to the character just after the
................................................................................
{
    Entry *entryPtr = recordPtr;
    if (objc == 3) {
	int newFirst;
	if (EntryIndex(interp, entryPtr, objv[2], &newFirst) != TCL_OK) {
	    return TCL_ERROR;
	}
	TtkScrollTo(entryPtr->entry.xscrollHandle, newFirst);
	return TCL_OK;
    }
    return TtkScrollviewCommand(interp, objc, objv, entryPtr->entry.xscrollHandle);
}

static const Ttk_Ensemble EntryCommands[] = {
    { "bbox", 		EntryBBoxCommand,0 },

static int EntryConfigure(Tcl_Interp *interp, void *recordPtr, int mask)
{
    Entry *entryPtr = recordPtr;
    Tcl_Obj *textVarName = entryPtr->entry.textVariableObj;
    Ttk_TraceHandle *vt = 0;

    if (mask & TEXTVAR_CHANGED) {
	if (textVarName && *Tcl_GetString(textVarName) != '\0') {
	    vt = Ttk_TraceVariable(interp,
		    textVarName,EntryTextVariableTrace,entryPtr);
	    if (!vt) return TCL_ERROR;
	}
    }

    if (TtkCoreConfigure(interp, recordPtr, mask) != TCL_OK) {
................................................................................
	if (x > maxWidth) {
	    x = maxWidth;
	    roundUp = 1;
	}
	*indexPtr = Tk_PointToChar(entryPtr->entry.textLayout,
		x - entryPtr->entry.layoutX, 0);

        TtkUpdateScrollInfo(entryPtr->entry.xscrollHandle);
	if (*indexPtr < entryPtr->entry.xscroll.first) {
	    *indexPtr = entryPtr->entry.xscroll.first;
	}

	/*
	 * Special trick:  if the x-position was off-screen to the right,
	 * round the index up to refer to the character just after the
................................................................................
{
    Entry *entryPtr = recordPtr;
    if (objc == 3) {
	int newFirst;
	if (EntryIndex(interp, entryPtr, objv[2], &newFirst) != TCL_OK) {
	    return TCL_ERROR;
	}
	TtkScrollTo(entryPtr->entry.xscrollHandle, newFirst, 1);
	return TCL_OK;
    }
    return TtkScrollviewCommand(interp, objc, objv, entryPtr->entry.xscrollHandle);
}

static const Ttk_Ensemble EntryCommands[] = {
    { "bbox", 		EntryBBoxCommand,0 },

 * 	-yscrollcommand has changed).
 */

void TtkScrollbarUpdateRequired(ScrollHandle h)
{
    h->flags |= SCROLL_UPDATE_REQUIRED;
}














/* TtkScrollviewCommand --
 * 	Widget [xy]view command implementation.
 *
 *  $w [xy]view -- return current view region
 *  $w [xy]view $index -- set topmost item
 *  $w [xy]view moveto $fraction
 *  $w [xy]view scroll $number $what -- scrollbar interface
 */
int TtkScrollviewCommand(
    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[], ScrollHandle h)
{
    Scrollable *s = h->scrollPtr;



    int newFirst = s->first;

    if (objc == 2) {
	Tcl_Obj *result[2];
	result[0] = Tcl_NewDoubleObj((double)s->first / s->total);
	result[1] = Tcl_NewDoubleObj((double)s->last / s->total);
	Tcl_SetObjResult(interp, Tcl_NewListObj(2, result));
	return TCL_OK;
................................................................................
		int perPage = s->last - s->first;	/* @@@ */
		newFirst = s->first + count * perPage;
		break;
	    }
	}
    }

    TtkScrollTo(h, newFirst);

    return TCL_OK;
}

void TtkScrollTo(ScrollHandle h, int newFirst)
{
    Scrollable *s = h->scrollPtr;





    if (newFirst >= s->total)
	newFirst = s->total - 1;
    if (newFirst > s->first && s->last >= s->total) /* don't scroll past end */
	newFirst = s->first;
    if (newFirst < 0)
	newFirst = 0;

 * 	-yscrollcommand has changed).
 */

void TtkScrollbarUpdateRequired(ScrollHandle h)
{
    h->flags |= SCROLL_UPDATE_REQUIRED;
}

/* TtkUpdateScrollInfo --
 * 	Call the layoutProc to update the scroll info first, last, and total.
 * 	Do it only if needed, that is when a redisplay is pending (which
 * 	indicates scroll info are possibly out of date).
 */

void TtkUpdateScrollInfo(ScrollHandle h)
{
    if (h->corePtr->flags & REDISPLAY_PENDING) {
        h->corePtr->widgetSpec->layoutProc(h->corePtr);
    }
}

/* TtkScrollviewCommand --
 * 	Widget [xy]view command implementation.
 *
 *  $w [xy]view -- return current view region
 *  $w [xy]view $index -- set topmost item
 *  $w [xy]view moveto $fraction
 *  $w [xy]view scroll $number $what -- scrollbar interface
 */
int TtkScrollviewCommand(
    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[], ScrollHandle h)
{
    Scrollable *s = h->scrollPtr;
    int newFirst;

    TtkUpdateScrollInfo(h);
    newFirst = s->first;

    if (objc == 2) {
	Tcl_Obj *result[2];
	result[0] = Tcl_NewDoubleObj((double)s->first / s->total);
	result[1] = Tcl_NewDoubleObj((double)s->last / s->total);
	Tcl_SetObjResult(interp, Tcl_NewListObj(2, result));
	return TCL_OK;
................................................................................
		int perPage = s->last - s->first;	/* @@@ */
		newFirst = s->first + count * perPage;
		break;
	    }
	}
    }

    TtkScrollTo(h, newFirst, 0);

    return TCL_OK;
}

void TtkScrollTo(ScrollHandle h, int newFirst, int updateScrollInfo)
{
    Scrollable *s = h->scrollPtr;

    if (updateScrollInfo) {
        TtkUpdateScrollInfo(h);
    }

    if (newFirst >= s->total)
	newFirst = s->total - 1;
    if (newFirst > s->first && s->last >= s->total) /* don't scroll past end */
	newFirst = s->first;
    if (newFirst < 0)
	newFirst = 0;

/*
 * Tcl_VarTraceProc for trace handles.
 */
static char *
VarTraceProc(
    ClientData clientData,	/* Widget record pointer */
    Tcl_Interp *interp, 	/* Interpreter containing variable. */
    const char *name1,		/* Name of variable. */
    const char *name2,		/* Second part of variable name. */
    int flags)			/* Information about what happened. */
{
    Ttk_TraceHandle *tracePtr = clientData;
    const char *name, *value;
    Tcl_Obj *valuePtr;

    if (flags & TCL_INTERP_DESTROYED) {
	return NULL;
    }

    /*
     * See ticket [5d991b82].
     */

    if (tracePtr->varnameObj == NULL) {
	Tcl_UntraceVar2(interp, name1, name2,
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		VarTraceProc, clientData);
	return NULL;
    }

    name = Tcl_GetString(tracePtr->varnameObj);

    /*
     * If the variable is being unset, then re-establish the trace:
     */
    if (flags & TCL_TRACE_DESTROYED) {
	/*

/*
 * Tcl_VarTraceProc for trace handles.
 */
static char *
VarTraceProc(
    ClientData clientData,	/* Widget record pointer */
    Tcl_Interp *interp, 	/* Interpreter containing variable. */
    const char *name1,		/* (unused) */
    const char *name2,		/* (unused) */
    int flags)			/* Information about what happened. */
{
    Ttk_TraceHandle *tracePtr = clientData;
    const char *name, *value;
    Tcl_Obj *valuePtr;

    if (flags & TCL_INTERP_DESTROYED) {
	return NULL;
    }












    name = Tcl_GetString(tracePtr->varnameObj);

    /*
     * If the variable is being unset, then re-establish the trace:
     */
    if (flags & TCL_TRACE_DESTROYED) {
	/*

    }
    tv->tree.yscroll.total = CountRows(tv->tree.root) - 1;

    /* Make sure item is visible:
     */
    rowNumber = RowNumber(tv, item);
    if (rowNumber < tv->tree.yscroll.first) {
	TtkScrollTo(tv->tree.yscrollHandle, rowNumber);
    } else if (rowNumber >= tv->tree.yscroll.last) {
	TtkScrollTo(tv->tree.yscrollHandle,
	    tv->tree.yscroll.first + (1+rowNumber - tv->tree.yscroll.last));
    }

    return TCL_OK;
}

/*------------------------------------------------------------------------
 * +++ Widget commands -- interactive column resize

    }
    tv->tree.yscroll.total = CountRows(tv->tree.root) - 1;

    /* Make sure item is visible:
     */
    rowNumber = RowNumber(tv, item);
    if (rowNumber < tv->tree.yscroll.first) {
	TtkScrollTo(tv->tree.yscrollHandle, rowNumber, 1);
    } else if (rowNumber >= tv->tree.yscroll.last) {
	TtkScrollTo(tv->tree.yscrollHandle,
	    tv->tree.yscroll.first + (1+rowNumber - tv->tree.yscroll.last), 1);
    }

    return TCL_OK;
}

/*------------------------------------------------------------------------
 * +++ Widget commands -- interactive column resize

MODULE_SCOPE ScrollHandle TtkCreateScrollHandle(WidgetCore *, Scrollable *);
MODULE_SCOPE void TtkFreeScrollHandle(ScrollHandle);

MODULE_SCOPE int TtkScrollviewCommand(
    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[], ScrollHandle);


MODULE_SCOPE void TtkScrollTo(ScrollHandle, int newFirst);
MODULE_SCOPE void TtkScrolled(ScrollHandle, int first, int last, int total);
MODULE_SCOPE void TtkScrollbarUpdateRequired(ScrollHandle);

/*
 * Tag sets (work in progress, half-baked)
 */

MODULE_SCOPE ScrollHandle TtkCreateScrollHandle(WidgetCore *, Scrollable *);
MODULE_SCOPE void TtkFreeScrollHandle(ScrollHandle);

MODULE_SCOPE int TtkScrollviewCommand(
    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[], ScrollHandle);

MODULE_SCOPE void TtkUpdateScrollInfo(ScrollHandle h);
MODULE_SCOPE void TtkScrollTo(ScrollHandle, int newFirst, int updateScrollInfo);
MODULE_SCOPE void TtkScrolled(ScrollHandle, int first, int last, int total);
MODULE_SCOPE void TtkScrollbarUpdateRequired(ScrollHandle);

/*
 * Tag sets (work in progress, half-baked)
 */

proc ::tk::CheckLeave {w} {
    variable ::tk::Priv
    if {[$w cget -state] ne "disabled"} {
	$w configure -state normal
    }

    # Restore the original button "selected" color; assume that the user
    # wasn't monkeying around with things too much.

    if {![$w cget -indicatoron] && [info exist Priv($w,selectcolor)]} {



	$w configure -selectcolor $Priv($w,selectcolor)

    }
    unset -nocomplain Priv($w,selectcolor) Priv($w,aselectcolor)

    # Restore the original button relief if it was changed by Tk. That is
    # signaled by the existence of Priv($w,prelief).

    if {[info exists Priv($w,relief)]} {

proc ::tk::CheckLeave {w} {
    variable ::tk::Priv
    if {[$w cget -state] ne "disabled"} {
	$w configure -state normal
    }

    # Restore the original button "selected" color; but only if the user
    # has not changed it in the meantime.

    if {![$w cget -indicatoron] && [info exist Priv($w,selectcolor)]} {
        if {[$w cget -selectcolor] eq $Priv($w,selectcolor)
                || ([info exist Priv($w,aselectcolor)] &&
                    [$w cget -selectcolor] eq $Priv($w,aselectcolor))} {
	    $w configure -selectcolor $Priv($w,selectcolor)
	}
    }
    unset -nocomplain Priv($w,selectcolor) Priv($w,aselectcolor)

    # Restore the original button relief if it was changed by Tk. That is
    # signaled by the existence of Priv($w,prelief).

    if {[info exists Priv($w,relief)]} {

	set entry ""
	if {[$button cget -indicatoron]} {
	    set entry [MenuFindName $menu [$button cget -text]]
	    if {$entry eq ""} {
		set entry 0
	    }
	}
	if {$entry ne ""} {
	    if {$entry == [$menu index last]} {
		set entryHeight [expr {[winfo reqheight $menu] \
				       - [$menu yposition $entry]}]
	    } else {
		set entryHeight [expr {[$menu yposition [expr {$entry+1}]] \
					- [$menu yposition $entry]}]
	    }
	}
	set x [winfo rootx $button]
	set y [winfo rooty $button]
	switch [$button cget -direction] {
	    above {
		incr y [expr {-[winfo reqheight $menu]}]
		# if we go offscreen to the top, show as 'below'
		if {$y < [winfo vrooty $button]} {

	set entry ""
	if {[$button cget -indicatoron]} {
	    set entry [MenuFindName $menu [$button cget -text]]
	    if {$entry eq ""} {
		set entry 0
	    }
	}









	set x [winfo rootx $button]
	set y [winfo rooty $button]
	switch [$button cget -direction] {
	    above {
		incr y [expr {-[winfo reqheight $menu]}]
		# if we go offscreen to the top, show as 'below'
		if {$y < [winfo vrooty $button]} {

#

namespace eval ttk::theme::aqua {
    ttk::style theme settings aqua {

	ttk::style configure . \
	    -font TkDefaultFont \
	    -background systemTtkBackground \
	    -foreground systemLabelColor \
	    -selectbackground systemHighlight \
	    -selectforeground systemLabelColor \
	    -selectborderwidth 0 \
	    -insertwidth 1

	ttk::style map . \
	    -foreground {
		disabled systemLabelColor
		background systemLabelColor} \
	    -selectbackground {
		background systemHighlight
		!focus systemHighlightSecondary} \
	    -selectforeground {
		background systemLabelColor
		!focus systemDialogActiveText}

	# Button
	ttk::style configure TButton -anchor center -width -6\
	    -foreground systemControlTextColor
	ttk::style map TButton \
	    -foreground {
		disabled systemDisabledControlTextColor}
	ttk::style map TCheckbutton \
	    -foreground {
		disabled systemDisabledControlTextColor}
	ttk::style map TRadiobutton \
	    -foreground {
		disabled systemDisabledControlTextColor}
	ttk::style configure TMenubutton -anchor center -padding {2 0 0 2}
	ttk::style configure Toolbutton -anchor center
	ttk::style map Toolbutton \
	    -foreground {
		disabled systemDisabledControlTextColor
	    }

	# Entry
	ttk::style configure TEntry \
	    -foreground systemTextColor \
	    -background systemTextBackgroundColor \
	    -selectforeground systemSelectedTextColor
	ttk::style map TEntry \
	    -foreground {
		disabled systemDisabledControlTextColor}

	# Workaround for #1100117:
	# Actually, on Aqua we probably shouldn't stipple images in
	# disabled buttons even if it did work...
	ttk::style configure . -stipple {}

	# Notebook
	ttk::style configure TNotebook -tabmargins {10 0} -tabposition n
	ttk::style configure TNotebook -padding {18 8 18 17}
	ttk::style configure TNotebook.Tab -padding {12 3 12 2}
	ttk::style configure TNotebook.Tab -foreground white
	ttk::style map TNotebook.Tab \
	    -foreground {
		{background !disabled !selected} systemControlTextColor
		{background selected} systemTextBackgroundColor
		disabled systemDisabledControlTextColor
		!selected systemControlTextColor}

	# Combobox:
	ttk::style configure TCombobox \
	    -foreground systemTextColor \
	    -background systemTransparent \
	    -selectforeground systemSelectedTextColor \
	    -selectbackground systemSelectedTextBackgroundColor
................................................................................
		!active systemTextColor
	    } \
	    -selectbackground {
		!active systemTextBackgroundColor
		!focus systemTextBackgroundColor
		focus systemSelectedTextBackgroundColor
	    }
	
	# Treeview:
	ttk::style configure Heading \
	    -font TkHeadingFont \
	    -foreground systemTextColor \
	    -background systemTtkBackground
	ttk::style configure Treeview -rowheight 18 \
	    -background systemTextBackgroundColor \
	    -foreground systemTextColor \
	    -fieldbackground systemTextBackgroundColor
	ttk::style map Treeview \
	    -background {
		selected systemSelectedTextBackgroundColor

#

namespace eval ttk::theme::aqua {
    ttk::style theme settings aqua {

	ttk::style configure . \
	    -font TkDefaultFont \
	    -background systemWindowBackgroundColor \
	    -foreground systemLabelColor \
	    -selectbackground systemHighlight \
	    -selectforeground systemLabelColor \
	    -selectborderwidth 0 \
	    -insertwidth 1

	ttk::style map . \
	    -foreground {
		disabled systemDisabledControlTextColor
		background systemLabelColor} \
	    -selectbackground {
		background systemSelectedTextBackgroundColor
		!focus systemSelectedTextBackgroundColor} \
	    -selectforeground {
		background systemSelectedTextColor
		!focus systemSelectedTextColor}

	# Button
	ttk::style configure TButton -anchor center -width -6\
	    -foreground systemControlTextColor









	ttk::style configure TMenubutton -anchor center -padding {2 0 0 2}
	ttk::style configure Toolbutton -anchor center





	# Entry
	ttk::style configure TEntry \
	    -foreground systemTextColor \
	    -background systemTextBackgroundColor \





	# Workaround for #1100117:
	# Actually, on Aqua we probably shouldn't stipple images in
	# disabled buttons even if it did work...
	ttk::style configure . -stipple {}

	# Notebook
	ttk::style configure TNotebook -tabmargins {10 0} -tabposition n
	ttk::style configure TNotebook -padding {18 8 18 17}
	ttk::style configure TNotebook.Tab -padding {12 3 12 2}
	ttk::style configure TNotebook.Tab -foreground systemControlTextColor
	ttk::style map TNotebook.Tab \
	    -foreground {
		background systemControlTextColor

		disabled systemDisabledControlTextColor
		selected systemSelectedTabTextColor}

	# Combobox:
	ttk::style configure TCombobox \
	    -foreground systemTextColor \
	    -background systemTransparent \
	    -selectforeground systemSelectedTextColor \
	    -selectbackground systemSelectedTextBackgroundColor
................................................................................
		!active systemTextColor
	    } \
	    -selectbackground {
		!active systemTextBackgroundColor
		!focus systemTextBackgroundColor
		focus systemSelectedTextBackgroundColor
	    }

	# Treeview:
	ttk::style configure Heading \
	    -font TkHeadingFont \
	    -foreground systemTextColor \
	    -background systemWindowBackgroundColor
	ttk::style configure Treeview -rowheight 18 \
	    -background systemTextBackgroundColor \
	    -foreground systemTextColor \
	    -fieldbackground systemTextBackgroundColor
	ttk::style map Treeview \
	    -background {
		selected systemSelectedTextBackgroundColor

## UnmapPopdown -- <Unmap> binding for ComboboxPopdown
#
proc ttk::combobox::UnmapPopdown {w} {
    [winfo parent $w] state !pressed
    ttk::releaseGrab $w
}

###
#

namespace eval ::ttk::combobox {
    # @@@ Until we have a proper native scrollbar on Aqua, use
    # @@@ the regular Tk one.  Use ttk::scrollbar on other platforms.
    variable scrollbar ttk::scrollbar
    if {[tk windowingsystem] eq "aqua"} {
	set scrollbar ::scrollbar
    }
}

## PopdownWindow --
#	Returns the popdown widget associated with a combobox,
#	creating it if necessary.
#
proc ttk::combobox::PopdownWindow {cb} {
    variable scrollbar

    if {![winfo exists $cb.popdown]} {
	set poplevel [PopdownToplevel $cb.popdown]
	set popdown [ttk::frame $poplevel.f -style ComboboxPopdownFrame]

	$scrollbar $popdown.sb \
	    -orient vertical -command [list $popdown.l yview]
	listbox $popdown.l \
	    -listvariable ttk::combobox::Values($cb) \
	    -yscrollcommand [list $popdown.sb set] \
	    -exportselection false \
	    -selectmode browse \
	    -activestyle none \

## UnmapPopdown -- <Unmap> binding for ComboboxPopdown
#
proc ttk::combobox::UnmapPopdown {w} {
    [winfo parent $w] state !pressed
    ttk::releaseGrab $w
}













## PopdownWindow --
#	Returns the popdown widget associated with a combobox,
#	creating it if necessary.
#
proc ttk::combobox::PopdownWindow {cb} {


    if {![winfo exists $cb.popdown]} {
	set poplevel [PopdownToplevel $cb.popdown]
	set popdown [ttk::frame $poplevel.f -style ComboboxPopdownFrame]

	ttk::scrollbar $popdown.sb \
	    -orient vertical -command [list $popdown.l yview]
	listbox $popdown.l \
	    -listvariable ttk::combobox::Values($cb) \
	    -yscrollcommand [list $popdown.sb set] \
	    -exportselection false \
	    -selectmode browse \
	    -activestyle none \

    }
    return $pos
}

## See $index -- Make sure that the character at $index is visible.
#
proc ttk::entry::See {w {index insert}} {
    update idletasks	;# ensure scroll data up-to-date
    set c [$w index $index]
    # @@@ OR: check [$w index left] / [$w index right]
    if {$c < [$w index @0] || $c >= [$w index @[winfo width $w]]} {
	$w xview $c
    }
}

    }
    return $pos
}

## See $index -- Make sure that the character at $index is visible.
#
proc ttk::entry::See {w {index insert}} {

    set c [$w index $index]
    # @@@ OR: check [$w index left] / [$w index right]
    if {$c < [$w index @0] || $c >= [$w index @[winfo width $w]]} {
	$w xview $c
    }
}

    bind TMenubutton <ButtonPress-1>  \
	{ %W state pressed ; ttk::menubutton::Popdown %W }
    bind TMenubutton <ButtonRelease-1>  \
	{ if {[winfo exists %W]} { %W state !pressed } }
}

# PostPosition --
#	Returns the x and y coordinates where the menu
#	should be posted, based on the menubutton and menu size
#	and -direction option.



#
# TODO: adjust menu width to be at least as wide as the button
#	for -direction above, below.
#


proc ttk::menubutton::PostPosition {mb menu} {














    set x [winfo rootx $mb]
    set y [winfo rooty $mb]
    set dir [$mb cget -direction]




    set bw [winfo width $mb]





















    set bh [winfo height $mb]
    set mw [winfo reqwidth $menu]
    set mh [winfo reqheight $menu]
    set sw [expr {[winfo screenwidth  $menu] - $bw - $mw}]
    set sh [expr {[winfo screenheight $menu] - $bh - $mh}]





    switch -- $dir {
	above { if {$y >= $mh} { incr y -$mh } { incr y  $bh } }
	below { if {$y <= $sh} { incr y  $bh } { incr y -$mh } }
	left  { if {$x >= $mw} { incr x -$mw } { incr x  $bw } }
	right { if {$x <= $sw} { incr x  $bw } { incr x -$mw } }
	flush {
	    # post menu atop menubutton.
	    # If there's a menu entry whose label matches the
	    # menubutton -text, assume this is an optionmenu
	    # and place that entry over the menubutton.

	    set index [FindMenuEntry $menu [$mb cget -text]]
	    if {$index ne ""} {








		incr y -[$menu yposition $index]




	    }
	}







    }
















    return [list $x $y]

}

# Popdown --
#	Post the menu and set a grab on the menu.
#
proc ttk::menubutton::Popdown {mb} {
    if {[$mb instate disabled] || [set menu [$mb cget -menu]] eq ""} {
	return
    }
    foreach {x y} [PostPosition $mb $menu] { break }
    tk_popup $menu $x $y
}

# Pulldown (X11 only) --
#	Called when Button1 is pressed on a menubutton.
#	Posts the menu; a subsequent ButtonRelease
#	or Leave event will set a grab on the menu.
#
proc ttk::menubutton::Pulldown {mb} {
    variable State
    if {[$mb instate disabled] || [set menu [$mb cget -menu]] eq ""} {
	return
    }
    foreach {x y} [PostPosition $mb $menu] { break }
    set State(pulldown) 1
    set State(oldcursor) [$mb cget -cursor]

    $mb state pressed
    $mb configure -cursor [$menu cget -cursor]




    $menu post $x $y

    tk_menuSetFocus $menu
}

# TransferGrab (X11 only) --
#	Switch from pulldown mode (menubutton has an implicit grab)
#	to popdown mode (menu has an explicit grab).
#
................................................................................
    variable State
    if {$State(pulldown)} {
	$mb configure -cursor $State(oldcursor)
	$mb state {!pressed !active}
	set State(pulldown) 0

	set menu [$mb cget -menu]

    	tk_popup $menu [winfo rootx $menu] [winfo rooty $menu]
    }
}

# FindMenuEntry --
#	Hack to support tk_optionMenus.
#	Returns the index of the menu entry with a matching -label,

    bind TMenubutton <ButtonPress-1>  \
	{ %W state pressed ; ttk::menubutton::Popdown %W }
    bind TMenubutton <ButtonRelease-1>  \
	{ if {[winfo exists %W]} { %W state !pressed } }
}

# PostPosition --
#	Returns x and y coordinates and a menu item index.
#       If the index is not an empty string the menu should
#       be posted so that the upper left corner of the indexed
#       menu item is located at the point (x, y).  Otherwise
#       the top left corner of the menu itself should be located
#       at that point.
#
# TODO: adjust menu width to be at least as wide as the button
#	for -direction above, below.
#

if {[tk windowingsystem] eq "aqua"} {
    proc ::ttk::menubutton::PostPosition {mb menu} {
	set menuPad 5
	set buttonPad 1
	set bevelPad 4
	set mh [winfo reqheight $menu]
	set bh [expr {[winfo height $mb]} + $buttonPad]
	set bbh [expr {[winfo height $mb]} + $bevelPad]
	set mw [winfo reqwidth $menu]
	set bw [winfo width $mb]
	set dF [expr {[winfo width $mb] - [winfo reqwidth $menu] - $menuPad}]
	set entry ""
	set entry [::tk::MenuFindName $menu [$mb cget -text]]
	if {$entry eq ""} {
	    set entry 0
	}
	set x [winfo rootx $mb]
	set y [winfo rooty $mb]
	switch [$mb cget -direction] {
	    above {
		set entry ""
		incr y [expr {-$mh + 2 * $menuPad}]
	    }

	    below {
		set entry ""
		incr y $bh
	    }
	    left {
		incr y $menuPad
		incr x -$mw
	    }
	    right {
		incr y $menuPad
		incr x $bw
	    }
	    default {
		incr y $bbh
	    }
	}
	return [list $x $y $entry]
    }
} else {
    proc ::ttk::menubutton::PostPosition {mb menu} {
	set mh [expr {[winfo reqheight $menu]}]
	set bh [expr {[winfo height $mb]}]
	set mw [expr {[winfo reqwidth $menu]}]

	set bw [expr {[winfo width $mb]}]

	set dF [expr {[winfo width $mb] - [winfo reqwidth $menu]}]
	if {[tk windowingsystem] eq "win32"} {
	    incr mh 6
	    incr mw 16
	}










	set entry {}
	set entry [::tk::MenuFindName $menu [$mb cget -text]]

	if {$entry eq {}} {
	    set entry 0
	}
	set x [winfo rootx $mb]
	set y [winfo rooty $mb]
	switch [$mb cget -direction] {
	    above {
		set entry {}
		incr y -$mh
		# if we go offscreen to the top, show as 'below'
		if {$y < [winfo vrooty $mb]} {
		    set y [expr {[winfo vrooty $mb] + [winfo rooty $mb]\
                           + [winfo reqheight $mb]}]
		}
	    }
	    below {
		set entry {}
		incr y $bh
		# if we go offscreen to the bottom, show as 'above'
		if {($y + $mh) > ([winfo vrooty $mb] + [winfo vrootheight $mb])} {
		    set y [expr {[winfo vrooty $mb] + [winfo vrootheight $mb] \
			   + [winfo rooty $mb] - $mh}]
		}
	    }
	    left {
		incr x -$mw
	    }
	    right {
		incr x $bw
	    }
	    default {
		if {[$mb cget -style] eq ""} {
		    incr x [expr {([winfo width $mb] - \
				   [winfo reqwidth $menu])/ 2}]
		} else {
		    incr y $bh
		}
	    }
	}
	return [list $x $y $entry]
    }
}

# Popdown --
#	Post the menu and set a grab on the menu.
#
proc ttk::menubutton::Popdown {mb} {
    if {[$mb instate disabled] || [set menu [$mb cget -menu]] eq ""} {
	return
    }
    foreach {x y entry} [PostPosition $mb $menu] { break }
    tk_popup $menu $x $y $entry
}

# Pulldown (X11 only) --
#	Called when Button1 is pressed on a menubutton.
#	Posts the menu; a subsequent ButtonRelease
#	or Leave event will set a grab on the menu.
#
proc ttk::menubutton::Pulldown {mb} {
    variable State
    if {[$mb instate disabled] || [set menu [$mb cget -menu]] eq ""} {
	return
    }

    set State(pulldown) 1
    set State(oldcursor) [$mb cget -cursor]

    $mb state pressed
    $mb configure -cursor [$menu cget -cursor]
    foreach {x y entry} [PostPosition $mb $menu] { break }
    if {$entry ne {}} {
	$menu post $x $y $entry
    } else {
	$menu post $x $y
    }
    tk_menuSetFocus $menu
}

# TransferGrab (X11 only) --
#	Switch from pulldown mode (menubutton has an implicit grab)
#	to popdown mode (menu has an explicit grab).
#
................................................................................
    variable State
    if {$State(pulldown)} {
	$mb configure -cursor $State(oldcursor)
	$mb state {!pressed !active}
	set State(pulldown) 0

	set menu [$mb cget -menu]
	foreach {x y entry} [PostPosition $mb $menu] { break }
    	tk_popup $menu [winfo rootx $menu] [winfo rooty $menu]
    }
}

# FindMenuEntry --
#	Hack to support tk_optionMenus.
#	Returns the index of the menu entry with a matching -label,

    $w focus $item
    event generate $w <<TreeviewClose>>
}

## Toggle -- toggle opened/closed state of item
#
proc ttk::treeview::Toggle {w item} {






    if {[$w item $item -open]} {
	CloseItem $w $item
    } else {
	OpenItem $w $item
    }
}

    $w focus $item
    event generate $w <<TreeviewClose>>
}

## Toggle -- toggle opened/closed state of item
#
proc ttk::treeview::Toggle {w item} {
    # don't allow toggling on indicators that
    # are not present in front of leaf items
    if {[$w children $item] == {}} {
        return
    }
    # not a leaf, toggle!
    if {[$w item $item -open]} {
	CloseItem $w $item
    } else {
	OpenItem $w $item
    }
}

    canJoinAllSpaces, moveToActiveSpace, nonActivating

Note that not all attributes are valid for all window classes.  Support for the
3 argument form was added with the Cocoa-based Tk 8.5.7, at the same time
support for some legacy Carbon-specific classes and attributes was removed
(they are still accepted by the command but no longer have any effect).

- Another command available in the tk::unsupported::MacWindowStyle namespace is
tk::unsupported::MacWindowStyle tabbingid window ?newId?  which can be used to
get or set the tabbingIdentifier for the NSWindow associated with a Tk Window.
See section 3 for details.


- A command tk::unsupported::MacWindowStyle appearance window ?newAappearance?
is available when Tk is built and run on macOS 10.14 (Mojave) or later.  In
that case the Ttk widgets all support the "Dark Mode" appearance which was
introduced in 10.14. The command accepts the following values for the optional
newAppearance option: "aqua", "darkaqua", or "auto".  If the appearance is set
to aqua or darkaqua then the window will be displayed with the corresponding
appearance independent of any preferences settings.  If it is set to "auto"
the appearance will be determined by the preferences.  This command can be
used to opt out of Dark Mode on a per-window basis.







- If you want to use Remote Debugging with Xcode, you need to set the
environment variable XCNOSTDIN to 1 in the Executable editor for Wish. That will
cause us to force closing stdin & stdout.  Otherwise, given how Xcode launches
Wish remotely, they will be left open and then Wish & gdb will fight for stdin.

3. FullScreen, Split View and Tabbed Windows
................................................................................
which is already displayed as a tab will also cause it to become a separate
window.

4. Ttk, Dark Mode and semantic colors
---------------------------------------

With the release of OSX 10.14 (Mojave), Apple introduced the DarkAqua
appearance.  Part of the implementation of the Dark Mode was to make some of
the named NSColors have dynamic values.  Apple calls these "semantic colors"
because the name does not specify a specific color, but rather refers to the
context in which the color should be used.  Tk now provides the following

semantic colors as system colors: systemTextColor, systemTextBackgroundColor,
systemSelectedTextColor, systemSelectedTextBackgroundColor,
systemControlTextColor, systemDisabledControlTextColor, and systemLabelColor.
All of these except systemLabelColor, which was introduced in 10.10, were


present in OSX 10.0. The change in 10.14 was that the RGB color value of these
colors became dynamic, meaning that the color value can change when the
application appearance changes.  In particular, when a user selects Dark Mode
in the system preferences these colors change appearance.  For example
systemTextColor is dark in Aqua and light in DarkAqua.




The default background and foreground colors of most of the Tk widgets
have been set to semantic colors, which means that the widgets will change
appearance, and remain usable, when Dark Mode is selected in the system
preferences.  However, to get a close match to the native Dark Mode style it
is recommended to use Ttk widgets when possible.

Apple's tab view and GroupBox objects delimit their content by
displaying it within a rounded rectangle with a background color that
contrasts with the background of the containing object.  This means
that the background color of a Ttk widget depends on how deeply it is
nested inside of other widgets that use contrasting backgrounds.  To
support this, there are 8 contrasting system colors named
systemTtkBackground, systemTtkBackground1, ... , systemTtkBackground7.
The systemTtkBackground color is the standard background for a dialog
window and the others match the contrasting background colors for

backgrounds which are nested to the corresponding depth.

5. Building Tcl/Tk on macOS
------------------------------

- At least macOS 10.3 is required to build Tcl and TkX11, and macOS 10.6
is required to build TkAqua.  The XCode application provides everything
needed to build Tk, but it is not necessary to install the full XCode.

    canJoinAllSpaces, moveToActiveSpace, nonActivating

Note that not all attributes are valid for all window classes.  Support for the
3 argument form was added with the Cocoa-based Tk 8.5.7, at the same time
support for some legacy Carbon-specific classes and attributes was removed
(they are still accepted by the command but no longer have any effect).

- Another command available in the tk::unsupported::MacWindowStyle namespace is:
  tk::unsupported::MacWindowStyle tabbingid window ?newId?
which can be used to get or set the tabbingIdentifier for the NSWindow
associated with a Tk Window.  See section 3 for details.

- The command:
  tk::unsupported::MacWindowStyle appearance window ?newAappearance?
is available when Tk is built and run on macOS 10.14 (Mojave) or later.  In
that case the Ttk widgets all support the "Dark Mode" appearance which was
introduced in 10.14. The command accepts the following values for the optional
newAppearance option: "aqua", "darkaqua", or "auto".  If the appearance is set
to aqua or darkaqua then the window will be displayed with the corresponding
appearance independent of any preferences settings.  If it is set to "auto"
the appearance will be determined by the preferences.  This command can be
used to opt out of Dark Mode on a per-window basis.

- To determine the current appearance of a window in macOS 10.14 (Mojave) and
higher, one can use the command:
  tk::unsupported::MacWindowStyle isdark
The boolean return value is true if the window is currently displayed with the
dark appearance.

- If you want to use Remote Debugging with Xcode, you need to set the
environment variable XCNOSTDIN to 1 in the Executable editor for Wish. That will
cause us to force closing stdin & stdout.  Otherwise, given how Xcode launches
Wish remotely, they will be left open and then Wish & gdb will fight for stdin.

3. FullScreen, Split View and Tabbed Windows
................................................................................
which is already displayed as a tab will also cause it to become a separate
window.

4. Ttk, Dark Mode and semantic colors
---------------------------------------

With the release of OSX 10.14 (Mojave), Apple introduced the DarkAqua
appearance.  Part of the implementation of the Dark Mode was to make
some of the named NSColors have dynamic values.  Apple calls these
"semantic colors" because the name does not specify a specific color,
but rather refers to the context in which the color should be used.
Tk now provides the following semantic colors as system colors:
systemTextColor, systemTextBackgroundColor, systemSelectedTextColor,
systemSelectedTextBackgroundColor, systemControlTextColor,
systemDisabledControlTextColor, systemLabelColor, and

systemControlAccentColor.  All of these except the last two were
present in OSX 10.0 (and those two are simulated in systems where they
do not exist).  The change in 10.14 was that the RGB color value of
these colors became dynamic, meaning that the color value can change
when the application appearance changes.  In particular, when a user
selects Dark Mode in the system preferences these colors change
appearance.  For example systemTextColor is dark in Aqua and light in
DarkAqua.  One additional color, systemSelectedTabTextColor, does not
exist in macOS but is used by Tk to match the different colors used
for Notebook tab text in different OS versions.

The default background and foreground colors of most of the Tk widgets
have been set to semantic colors, which means that the widgets will change
appearance, and remain usable, when Dark Mode is selected in the system
preferences.  However, to get a close match to the native Dark Mode style it
is recommended to use Ttk widgets when possible.

Apple's tab view and GroupBox objects delimit their content by
displaying it within a rounded rectangle with a background color that
contrasts with the background of the containing object.  This means
that the background color of a Ttk widget depends on how deeply it is
nested inside of other widgets that use contrasting backgrounds.  To
support this, there are 8 contrasting system colors named
systemWindowBackgroundColor, and systemWindowBackgroundColor1 - 7.
The systemWindowBackgroundColor is the standard background for a
dialog window and the others match the contrasting background colors
used in ttk::notebooks and ttk::labelframes which are nested to the
corresponding depth.

5. Building Tcl/Tk on macOS
------------------------------

- At least macOS 10.3 is required to build Tcl and TkX11, and macOS 10.6
is required to build TkAqua.  The XCode application provides everything
needed to build Tk, but it is not necessary to install the full XCode.

/*
 * tkMacOSXButton.c --
 *
 *	This file implements the Macintosh specific portion of the
 *	button widgets.
 *
 * Copyright (c) 1996-1997 by Sun Microsystems, Inc.
 * Copyright 2001, Apple Computer, Inc.
 * Copyright (c) 2006-2007 Daniel A. Steffen <[email protected]>
 * Copyright 2007 Revar Desmera.
 * Copyright 2015 Kevin Walzer/WordTech Communications LLC.
 * Copyright 2015 Marc Culler.
................................................................................
    Tcl_TimerToken defaultPulseHandler;
} MacButton;

/*
 * Forward declarations for procedures defined later in this file:
 */


static void ButtonBackgroundDrawCB (const HIRect *btnbounds, MacButton *ptr,
        SInt16 depth, Boolean isColorDev);

static void ButtonContentDrawCB (const HIRect *bounds, ThemeButtonKind kind,
        const HIThemeButtonDrawInfo *info, MacButton *ptr, SInt16 depth,
	Boolean isColorDev);
static void ButtonEventProc(ClientData clientData, XEvent *eventPtr);

static void TkMacOSXComputeButtonParams (TkButton * butPtr, ThemeButtonKind* btnkind,

	HIThemeButtonDrawInfo* drawinfo);
static int TkMacOSXComputeButtonDrawParams (TkButton * butPtr, DrawParams * dpPtr);

static void TkMacOSXDrawButton (MacButton *butPtr, GC gc, Pixmap pixmap);

static void DrawButtonImageAndText(TkButton* butPtr);
static void PulseDefaultButtonProc(ClientData clientData);


/*
 * The class procedure table for the button widgets.
 */

const Tk_ClassProcs tkpButtonProcs = {
    sizeof(Tk_ClassProcs),	/* size */
    TkButtonWorldChanged,	/* worldChangedProc */
};

static int bCount;

/*
 *----------------------------------------------------------------------
 *
 * TkpButtonSetDefaults --
 *
 *	This procedure is invoked before option tables are created for
 *	buttons. It modifies some of the default values to match the current
 *	values defined for this platform.
 *
 * Results:
 *	Some of the default values in *specPtr are modified.
 *
 * Side effects:
 *	Updates some of.
 *
 *----------------------------------------------------------------------
 */

void
TkpButtonSetDefaults()
{
/*No-op.*/
}

 
/*
 *----------------------------------------------------------------------
 *
 * TkpCreateButton --
 *
 *	Allocate a new TkButton structure.
................................................................................
 *----------------------------------------------------------------------
 */

TkButton *
TkpCreateButton(
    Tk_Window tkwin)
{
    MacButton *macButtonPtr = (MacButton *) ckalloc(sizeof(MacButton));

    Tk_CreateEventHandler(tkwin, ActivateMask,
	    ButtonEventProc, (ClientData) macButtonPtr);
    macButtonPtr->id = bCount++;
    macButtonPtr->flags = FIRST_DRAW;
    macButtonPtr->btnkind = kThemePushButton;
    macButtonPtr->defaultPulseHandler = NULL;
    bzero(&macButtonPtr->drawinfo, sizeof(macButtonPtr->drawinfo));
    bzero(&macButtonPtr->lastdrawinfo, sizeof(macButtonPtr->lastdrawinfo));

    return (TkButton *)macButtonPtr;
}
 
/*
 *----------------------------------------------------------------------
 *
 * TkpDisplayButton --
 *
 *	This procedure is invoked to display a button widget. It is
 *	normally invoked as an idle handler.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Commands are output to X to display the button in its
 *	current mode. The REDRAW_PENDING flag is cleared.
 *
 *----------------------------------------------------------------------
 */

void
TkpDisplayButton(
    ClientData clientData)	/* Information about widget. */
{
    MacButton *macButtonPtr = (MacButton *) clientData;
    TkButton *butPtr = (TkButton *) clientData;
    Tk_Window tkwin = butPtr->tkwin;
    Pixmap pixmap;
    DrawParams* dpPtr = &macButtonPtr->drawParams;
    int needhighlight = 0;




    butPtr->flags &= ~REDRAW_PENDING;
    if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
	return;
    }
    pixmap = (Pixmap) Tk_WindowId(tkwin);
    TkMacOSXSetUpClippingRgn(Tk_WindowId(tkwin));

    if (TkMacOSXComputeButtonDrawParams(butPtr, dpPtr) ) {
	macButtonPtr->useTkText = 0;
    } else {
	macButtonPtr->useTkText = 1;
    }


    /*
     * Set up clipping region. Make sure the we are using the port
     * for this button, or we will set the wrong window's clip.
     */








    if (macButtonPtr->useTkText) {
	if (butPtr->type == TYPE_BUTTON) {
	    Tk_Fill3DRectangle(tkwin, pixmap, butPtr->highlightBorder, 0, 0,
		    Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
	} else {
	    Tk_Fill3DRectangle(tkwin, pixmap, butPtr->normalBorder, 0, 0,
		    Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
	}


        /* Display image or bitmap or text for labels or custom controls.  */


	DrawButtonImageAndText(butPtr);
        needhighlight  = 1;
    } else {

        /* Draw the native portion of the buttons. */


        TkMacOSXDrawButton(macButtonPtr, dpPtr->gc, pixmap);


        /* Draw highlight border, if needed. */


        if (butPtr->highlightWidth < 3) {
            needhighlight = 1;
        }
    }


    /* Draw highlight border, if needed. */


    if (needhighlight) {

        if ((butPtr->flags & GOT_FOCUS)) {
            Tk_Draw3DRectangle(tkwin, pixmap, butPtr->normalBorder, 0, 0,
                Tk_Width(tkwin), Tk_Height(tkwin),





                butPtr->highlightWidth, TK_RELIEF_SOLID);
        }
    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * TkpComputeButtonGeometry --
 *
 *	After changes in a button's text or bitmap, this procedure
 *	recomputes the button's geometry and passes this information
 *	along to the geometry manager for the window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The button's window may change size.
 *
................................................................................

void
TkpComputeButtonGeometry(
    TkButton *butPtr)		/* Button whose geometry may have changed. */
{
    int width = 0, height = 0, charWidth = 1, haveImage = 0, haveText = 0;
    int txtWidth = 0, txtHeight = 0;
    MacButton *mbPtr = (MacButton*)butPtr;
    Tk_FontMetrics fm;
    char *text = Tcl_GetString(butPtr->textPtr);

    TkMacOSXComputeButtonParams(butPtr, &mbPtr->btnkind, &mbPtr->drawinfo);

    /*
     * If the indicator is on, get its size.
     */

    if (butPtr->indicatorOn) {
      switch (butPtr->type) {
      case TYPE_RADIO_BUTTON:
	GetThemeMetric(kThemeMetricRadioButtonWidth, (SInt32 *)&butPtr->indicatorDiameter);

	  break;
      case TYPE_CHECK_BUTTON:
	GetThemeMetric(kThemeMetricCheckBoxWidth, (SInt32 *)&butPtr->indicatorDiameter);

	  break;
      default:
	break;
      }


      /* Allow 2px extra space next to the indicator. */


      butPtr->indicatorSpace = butPtr->indicatorDiameter + 2;
    } else {
      butPtr->indicatorSpace = 0;
      butPtr->indicatorDiameter = 0;
    }

    if (butPtr->image != NULL) {
	Tk_SizeOfImage(butPtr->image, &width, &height);
	haveImage = 1;
    } else if (butPtr->bitmap != None) {
	Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
................................................................................
	txtWidth = butPtr->textWidth + 2*butPtr->padX;
	txtHeight = butPtr->textHeight + 2*butPtr->padY;
	haveText = 1;
    }

    if (haveImage && haveText) { /* Image and Text */
	switch ((enum compound) butPtr->compound) {
	    case COMPOUND_TOP:
	    case COMPOUND_BOTTOM:

		/*
		 * Image is above or below text.
		 */

		height += txtHeight + butPtr->padY;
		width = (width > txtWidth ? width : txtWidth);
		break;
	    case COMPOUND_LEFT:
	    case COMPOUND_RIGHT:

		/*
		 * Image is left or right of text.
		 */

		width += txtWidth + 2*butPtr->padX;
		height = (height > txtHeight ? height : txtHeight);
		break;
	    case COMPOUND_CENTER:

		/*
		 * Image and text are superimposed.
		 */

		width = (width > txtWidth ? width : txtWidth);
		height = (height > txtHeight ? height : txtHeight);
		break;
	    default:
		break;
	}
	width += butPtr->indicatorSpace;
    } else if (haveImage) { /* Image only */
	width = butPtr->width > 0 ? butPtr->width : width + butPtr->indicatorSpace;
	height = butPtr->height > 0 ? butPtr->height : height;
	if (butPtr->type == TYPE_BUTTON) {

	    /* Allow room to shift the image. */

	    width += 2;
	    height += 2;
	}
    } else { /* Text only */
        width = txtWidth + butPtr->indicatorSpace;
	height = txtHeight;
	if (butPtr->width > 0) {
................................................................................
    }

    butPtr->inset = butPtr->borderWidth + butPtr->highlightWidth;

    width += butPtr->inset*2;
    height += butPtr->inset*2;
    if ([NSApp macMinorVersion] == 6) {
      width += 12;
    }
    if (mbPtr->btnkind == kThemePushButton) {
        HIRect tmpRect;
    	HIRect contBounds;

	/*
	 * A PushButton has a minimum size.  We make sure that we
	 * are not underestimating the size by requesting the content
	 * size of a Pushbutton whose overall size is our content size
	 * expanded by the standard padding.
	 */
	
	tmpRect = CGRectMake(0, 0, width + 2*HI_PADX, height + 2*HI_PADY);
        HIThemeGetButtonContentBounds(&tmpRect, &mbPtr->drawinfo, &contBounds);
        if (height < contBounds.size.height) {
	    height = contBounds.size.height;
        }
        if (width < contBounds.size.width) {
	    width = contBounds.size.width;
................................................................................
        }
	height += 2*HI_PADY;
	width += 2*HI_PADX;
    }
    Tk_GeometryRequest(butPtr->tkwin, width, height);
    Tk_SetInternalBorder(butPtr->tkwin, butPtr->inset);
}

/*
 *----------------------------------------------------------------------
 *
 * DrawButtonImageAndText --
 *
 *        Draws the image and text associated with a button or label.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        The image and text are drawn.
 *
 *----------------------------------------------------------------------
 */
static void
DrawButtonImageAndText(
    TkButton* butPtr)
{

    MacButton *mbPtr = (MacButton*)butPtr;
    Tk_Window  tkwin  = butPtr->tkwin;
    Pixmap     pixmap;
    int        haveImage = 0;
    int        haveText = 0;
    int        imageWidth = 0;
    int        imageHeight = 0;
    int        imageXOffset = 0;
    int        imageYOffset = 0;
    int        textXOffset = 0;
    int        textYOffset = 0;
    int        width = 0;
    int        height = 0;
    int        fullWidth = 0;
    int        fullHeight = 0;
    int        pressed = 0;


    if (tkwin == NULL || !Tk_IsMapped(tkwin)) {
        return;
    }

    DrawParams* dpPtr = &mbPtr->drawParams;
    pixmap = (Pixmap)Tk_WindowId(tkwin);

    if (butPtr->image != None) {
        Tk_SizeOfImage(butPtr->image, &width, &height);
        haveImage = 1;
    } else if (butPtr->bitmap != None) {
        Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
        haveImage = 1;
    }

    imageWidth  = width;
    imageHeight = height;

    if (mbPtr->drawinfo.state == kThemeStatePressed) {

        /* Offset bitmaps by a bit when the button is pressed. */


        pressed = 1;
    }

    haveText = (butPtr->textWidth != 0 && butPtr->textHeight != 0);
    if (haveImage && haveText) { /* Image and Text */
        int x;
        int y;
        textXOffset = 0;
        textYOffset = 0;
        fullWidth = 0;
        fullHeight = 0;

        switch ((enum compound) butPtr->compound) {
	case COMPOUND_TOP:
	case COMPOUND_BOTTOM: {
	  /* Image is above or below text */
	  if (butPtr->compound == COMPOUND_TOP) {
	    textYOffset = height + butPtr->padY;
	  } else {
	    imageYOffset = butPtr->textHeight + butPtr->padY;
	  }
	  fullHeight = height + butPtr->textHeight + butPtr->padY;
	  fullWidth = (width > butPtr->textWidth ? width :
		       butPtr->textWidth);
	  textXOffset = (fullWidth - butPtr->textWidth)/2;
	  imageXOffset = (fullWidth - width)/2;
	  break;
	}
	case COMPOUND_LEFT:
	case COMPOUND_RIGHT: {
	  /*
	   * Image is left or right of text
	   */

	  if (butPtr->compound == COMPOUND_LEFT) {
	    textXOffset = width + butPtr->padX;
	  } else {
	    imageXOffset = butPtr->textWidth + butPtr->padX;
	  }
	  fullWidth = butPtr->textWidth + butPtr->padX + width;
	  fullHeight = (height > butPtr->textHeight ? height :
                        butPtr->textHeight);
	  textYOffset = (fullHeight - butPtr->textHeight)/2;
	  imageYOffset = (fullHeight - height)/2;
	  break;
	}
	case COMPOUND_CENTER: {
	  /*
	   * Image and text are superimposed
	   */

	  fullWidth = (width > butPtr->textWidth ? width :
		       butPtr->textWidth);
	  fullHeight = (height > butPtr->textHeight ? height :
                        butPtr->textHeight);
	  textXOffset = (fullWidth - butPtr->textWidth)/2;
	  imageXOffset = (fullWidth - width)/2;
	  textYOffset = (fullHeight - butPtr->textHeight)/2;
	  imageYOffset = (fullHeight - height)/2;
	  break;
	}
	default:
	  break;
	}

        TkComputeAnchor(butPtr->anchor, tkwin,
                butPtr->padX + butPtr->borderWidth,
                butPtr->padY + butPtr->borderWidth,
                fullWidth + butPtr->indicatorSpace, fullHeight, &x, &y);
	x += butPtr->indicatorSpace;
................................................................................
            x += dpPtr->offset;
            y += dpPtr->offset;
        }
        imageXOffset += x;
        imageYOffset += y;

        if (butPtr->image != NULL) {
	  if ((butPtr->selectImage != NULL) &&
	      (butPtr->flags & SELECTED)) {
	    Tk_RedrawImage(butPtr->selectImage, 0, 0,
			   width, height, pixmap, imageXOffset, imageYOffset);
	  } else if ((butPtr->tristateImage != NULL) &&
		     (butPtr->flags & TRISTATED)) {
	    Tk_RedrawImage(butPtr->tristateImage, 0, 0,
			   width, height, pixmap, imageXOffset, imageYOffset);
	  } else {
	    Tk_RedrawImage(butPtr->image, 0, 0, width,
			   height, pixmap, imageXOffset, imageYOffset);
	  }
        } else {
	  XSetClipOrigin(butPtr->display, dpPtr->gc,
			 imageXOffset, imageYOffset);
	  XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, dpPtr->gc,
		     0, 0, (unsigned int) width, (unsigned int) height,
		     imageXOffset, imageYOffset, 1);
	  XSetClipOrigin(butPtr->display, dpPtr->gc, 0, 0);
        }

	y += 1; /* Tweak to match native buttons. */
        Tk_DrawTextLayout(butPtr->display, pixmap,
                dpPtr->gc, butPtr->textLayout,
                x + textXOffset, y + textYOffset, 0, -1);
        Tk_UnderlineTextLayout(butPtr->display, pixmap, dpPtr->gc,
                butPtr->textLayout,
                x + textXOffset, y + textYOffset,
                butPtr->underline);
    } else if (haveImage) { /* Image only */
        int x = 0;
	int y;

	TkComputeAnchor(butPtr->anchor, tkwin,
			butPtr->padX + butPtr->borderWidth,
			butPtr->padY + butPtr->borderWidth,
			width + butPtr->indicatorSpace,
			height, &x, &y);
        x += butPtr->indicatorSpace;
	if (pressed) {
	  x += dpPtr->offset;
	  y += dpPtr->offset;
	}
	imageXOffset += x;
	imageYOffset += y;

	if (butPtr->image != NULL) {

	  if ((butPtr->selectImage != NULL) &&
	      (butPtr->flags & SELECTED)) {
	    Tk_RedrawImage(butPtr->selectImage, 0, 0, width,
			   height, pixmap, imageXOffset, imageYOffset);
	  } else if ((butPtr->tristateImage != NULL) &&
		     (butPtr->flags & TRISTATED)) {
	    Tk_RedrawImage(butPtr->tristateImage, 0, 0, width,
			   height, pixmap, imageXOffset, imageYOffset);
	  } else {
	    Tk_RedrawImage(butPtr->image, 0, 0, width, height,
			   pixmap, imageXOffset, imageYOffset);
	  }
	} else {
	  XSetClipOrigin(butPtr->display, dpPtr->gc, x, y);
	  XCopyPlane(butPtr->display, butPtr->bitmap,
		     pixmap, dpPtr->gc,
		     0, 0, (unsigned int) width,
		     (unsigned int) height,
		     imageXOffset, imageYOffset, 1);
	  XSetClipOrigin(butPtr->display, dpPtr->gc, 0, 0);
	}
    } else { /* Text only */
        int x, y;

	TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
			butPtr->textWidth + butPtr->indicatorSpace,
			  butPtr->textHeight, &x, &y);
	x += butPtr->indicatorSpace;
	y += 1; /* Tweak to match native buttons */
	Tk_DrawTextLayout(butPtr->display, pixmap, dpPtr->gc, butPtr->textLayout,
			  x, y, 0, -1);
    }

    /*
     * If the button is disabled with a stipple rather than a special
     * foreground color, generate the stippled effect.  If the widget
     * is selected and we use a different background color when selected,
     * must temporarily modify the GC so the stippling is the right color.
     */

    if (mbPtr->useTkText) {
        if ((butPtr->state == STATE_DISABLED)
                && ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) {
            if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
                    && (butPtr->selectBorder != NULL)) {
................................................................................

        /*
         * Draw the border and traversal highlight last.  This way, if the
         * button's contents overflow they'll be covered up by the border.
         */

        if (dpPtr->relief != TK_RELIEF_FLAT) {
            int inset = butPtr->highlightWidth;

            Tk_Draw3DRectangle(tkwin, pixmap, dpPtr->border, inset, inset,
                Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset,
                butPtr->borderWidth, dpPtr->relief);
        }
    }

   }




/*
 *----------------------------------------------------------------------
 *
 * TkpDestroyButton --
 *
 *	Free data structures associated with the button control.
 *
................................................................................
 */

void
TkpDestroyButton(
    TkButton *butPtr)
{
    MacButton *mbPtr = (MacButton *) butPtr; /* Mac button. */

    if (mbPtr->defaultPulseHandler) {
        Tcl_DeleteTimerHandler(mbPtr->defaultPulseHandler);
    }
}
 
/*
 *--------------------------------------------------------------
 *
 * TkMacOSXDrawButton --
 *
 *        This function draws the tk button using Mac controls
 *        In addition, this code may apply custom colors passed
 *        in the TkButton.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *      The control is created, or reinitialised as needed
 *
................................................................................
TkMacOSXDrawButton(
    MacButton *mbPtr,    /* Mac button. */
    GC gc,               /* The GC we are drawing into - needed for
                          * the bevel button */
    Pixmap pixmap)       /* The pixmap we are drawing into - needed
                          * for the bevel button */
{
    TkButton * butPtr = ( TkButton *)mbPtr;
    TkWindow * winPtr;
    HIRect      cntrRect;
    TkMacOSXDrawingContext dc;
    DrawParams* dpPtr = &mbPtr->drawParams;
    int useNewerHITools = 1;

    winPtr = (TkWindow *)butPtr->tkwin;

    TkMacOSXComputeButtonParams(butPtr, &mbPtr->btnkind, &mbPtr->drawinfo);

    cntrRect = CGRectMake(winPtr->privatePtr->xOff,
			  winPtr->privatePtr->yOff,
			  Tk_Width(butPtr->tkwin),
			  Tk_Height(butPtr->tkwin));

     cntrRect = CGRectInset(cntrRect,  butPtr->inset, butPtr->inset);

    if (useNewerHITools == 1) {
        HIRect contHIRec;
        static HIThemeButtonDrawInfo hiinfo;

        ButtonBackgroundDrawCB(&cntrRect, mbPtr, 32, true);

	if (!TkMacOSXSetupDrawingContext(pixmap, dpPtr->gc, 1, &dc)) {
	    return;
	}

        hiinfo.version = 0;
        hiinfo.state = mbPtr->drawinfo.state;
        hiinfo.kind  = mbPtr->btnkind;
        hiinfo.value = mbPtr->drawinfo.value;
        hiinfo.adornment = mbPtr->drawinfo.adornment;
        hiinfo.animation.time.current = CFAbsoluteTimeGetCurrent();
        if (hiinfo.animation.time.start == 0) {
            hiinfo.animation.time.start = hiinfo.animation.time.current;
        }

	/*
	 * To avoid buttons with white text on a white background, we always
	 * set the state to inactive in Dark Mode.  It isn't perfect but
	 * it is usable.  Using a ttk::button would be a better choice,
	 * however.
	 */

	if (TkMacOSXInDarkMode(butPtr->tkwin)) {
	    hiinfo.state = kThemeStateInactive;
	}
	HIThemeDrawButton(&cntrRect, &hiinfo, dc.context, kHIThemeOrientationNormal,
			  &contHIRec);

	TkMacOSXRestoreDrawingContext(&dc);
        ButtonContentDrawCB(&contHIRec, mbPtr->btnkind, &mbPtr->drawinfo,
			    (MacButton *)mbPtr, 32, true);

    } else {
	if (!TkMacOSXSetupDrawingContext(pixmap, dpPtr->gc, 1, &dc)) {
	    return;
	}

	TkMacOSXRestoreDrawingContext(&dc);
    }
................................................................................
}
 
/*
 *--------------------------------------------------------------
 *
 * ButtonBackgroundDrawCB --
 *
 *        This function draws the background that
 *        lies under checkboxes and radiobuttons.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        The background gets updated to the current color.
 *
 *--------------------------------------------------------------
 */

static void
ButtonBackgroundDrawCB (
    const HIRect * btnbounds,
    MacButton *ptr,
    SInt16 depth,
    Boolean isColorDev)
{
    MacButton* mbPtr = (MacButton*)ptr;
    TkButton* butPtr = (TkButton*)mbPtr;
    Tk_Window  tkwin  = butPtr->tkwin;
    Pixmap pixmap;
    int usehlborder = 0;

    if (tkwin == NULL || !Tk_IsMapped(tkwin)) {
        return;
    }
    pixmap = (Pixmap)Tk_WindowId(tkwin);

    if (butPtr->type != TYPE_LABEL) {
        switch (mbPtr->btnkind) {
            case kThemeSmallBevelButton:
            case kThemeBevelButton:
            case kThemeRoundedBevelButton:
            case kThemePushButton:
                usehlborder = 1;
                break;
        }
    }
    if (usehlborder) {
        Tk_Fill3DRectangle(tkwin, pixmap, butPtr->highlightBorder, 0, 0,
            Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
    } else {
        Tk_Fill3DRectangle(tkwin, pixmap, butPtr->normalBorder, 0, 0,
................................................................................
    const HIRect * btnbounds,
    ThemeButtonKind kind,
    const HIThemeButtonDrawInfo *drawinfo,
    MacButton *ptr,
    SInt16 depth,
    Boolean isColorDev)
{
    TkButton  *butPtr = (TkButton *)ptr;
    Tk_Window  tkwin  = butPtr->tkwin;

    if (tkwin == NULL || !Tk_IsMapped(tkwin)) {
        return;
    }

    /*
     * Overlay Tk elements over button native region: drawing elements
     * within button boundaries/native region causes unpredictable metrics.
     */

    DrawButtonImageAndText( butPtr);
}
 
/*
 *--------------------------------------------------------------
 *
 * ButtonEventProc --
 *
 *	This procedure is invoked by the Tk dispatcher for various
 *	events on buttons.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	When it gets exposed, it is redisplayed.
 *
................................................................................
 */

static void
ButtonEventProc(
    ClientData clientData,	/* Information about window. */
    XEvent *eventPtr)		/* Information about event. */
{
    TkButton *buttonPtr = (TkButton *) clientData;
    MacButton *mbPtr = (MacButton *) clientData;

    if (eventPtr->type == ActivateNotify
	    || eventPtr->type == DeactivateNotify) {
	if ((buttonPtr->tkwin == NULL) || (!Tk_IsMapped(buttonPtr->tkwin))) {
	    return;
	}
	if (eventPtr->type == ActivateNotify) {
	    mbPtr->flags |= ACTIVE;
	} else {
	    mbPtr->flags &= ~ACTIVE;
	}
	if ((buttonPtr->flags & REDRAW_PENDING) == 0) {
	    Tcl_DoWhenIdle(TkpDisplayButton, (ClientData) buttonPtr);
	    buttonPtr->flags |= REDRAW_PENDING;
	}
    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXComputeButtonParams --
 *
 *      This procedure computes the various parameters used
 *        when creating a Carbon Appearance control.
 *	These are determined by the various tk button parameters
 *
 * Results:
 *	None.
 *
 * Side effects:
 *        Sets the btnkind and drawinfo parameters
 *
 *----------------------------------------------------------------------
 */

static void
TkMacOSXComputeButtonParams(
        TkButton * butPtr,
        ThemeButtonKind* btnkind,
	HIThemeButtonDrawInfo *drawinfo)
{
    MacButton *mbPtr = (MacButton *)butPtr;

    if (butPtr->borderWidth <= 2) {
        *btnkind = kThemeSmallBevelButton;
    } else if (butPtr->borderWidth == 3) {
        *btnkind = kThemeBevelButton;
    } else if (butPtr->borderWidth == 4) {
        *btnkind = kThemeRoundedBevelButton;
    } else {
        *btnkind = kThemePushButton;
    }

    if ((butPtr->image == None) && (butPtr->bitmap == None)) {
        switch (butPtr->type) {
            case TYPE_BUTTON:
                *btnkind = kThemePushButton;
                break;
            case TYPE_RADIO_BUTTON:
                if (butPtr->borderWidth <= 1) {
                    *btnkind = kThemeSmallRadioButton;
		} else {
                    *btnkind = kThemeRadioButton;
		}
		break;
	    case TYPE_CHECK_BUTTON:
                if (butPtr->borderWidth <= 1) {
                    *btnkind = kThemeSmallCheckBox;
	        } else {
                    *btnkind = kThemeCheckBox;
		}
		break;
	}
    }

    if (butPtr->indicatorOn) {
        switch (butPtr->type) {
            case TYPE_RADIO_BUTTON:
                if (butPtr->borderWidth <= 1) {
                    *btnkind = kThemeSmallRadioButton;
                } else {
                    *btnkind = kThemeRadioButton;
                }
                break;
            case TYPE_CHECK_BUTTON:
                if (butPtr->borderWidth <= 1) {
                    *btnkind = kThemeSmallCheckBox;
                } else {
                    *btnkind = kThemeCheckBox;
                }
                break;
        }
    } else {
        if (butPtr->type == TYPE_RADIO_BUTTON ||
	    butPtr->type == TYPE_CHECK_BUTTON
	) {
	    if (*btnkind == kThemePushButton) {
		*btnkind = kThemeBevelButton;
	    }
        }
    }

    if (butPtr->flags & SELECTED) {
................................................................................
    }

    drawinfo->adornment = kThemeAdornmentNone;
    if (butPtr->defaultState == DEFAULT_ACTIVE) {
        drawinfo->adornment |= kThemeAdornmentDefault;
        if (!mbPtr->defaultPulseHandler) {
            mbPtr->defaultPulseHandler = Tcl_CreateTimerHandler(
                    PULSE_TIMER_MSECS, PulseDefaultButtonProc,
                    (ClientData) butPtr);
        }
    } else if (mbPtr->defaultPulseHandler) {
        Tcl_DeleteTimerHandler(mbPtr->defaultPulseHandler);
    }
    if (butPtr->highlightWidth >= 3) {
        if ((butPtr->flags & GOT_FOCUS)) {
            drawinfo->adornment |= kThemeAdornmentFocus;
................................................................................
}
 
/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXComputeButtonDrawParams --
 *
 *	This procedure computes the various parameters used
 *	when drawing a button
 *	These are determined by the various tk button parameters
 *
 * Results:
 *	1 if control will be used, 0 otherwise.
 *
 * Side effects:
 *	Sets the button draw parameters
 *
................................................................................
 */

static int
TkMacOSXComputeButtonDrawParams(
    TkButton *butPtr,
    DrawParams *dpPtr)
{
    MacButton *mbPtr = (MacButton *)butPtr;

    dpPtr->hasImageOrBitmap = ((butPtr->image != NULL)
	    || (butPtr->bitmap != None));

    if (butPtr->type != TYPE_LABEL) {
        dpPtr->offset = 0;
        if (dpPtr->hasImageOrBitmap) {
            switch (mbPtr->btnkind) {
                case kThemeSmallBevelButton:
                case kThemeBevelButton:
                case kThemeRoundedBevelButton:
                case kThemePushButton:
                    dpPtr->offset = 1;
                    break;
            }
        }
    }

    dpPtr->border = butPtr->normalBorder;
    if ((butPtr->state == STATE_DISABLED) && (butPtr->disabledFg != NULL)) {
	dpPtr->gc = butPtr->disabledGC;
................................................................................

    if ((butPtr->flags & SELECTED) && (butPtr->state != STATE_ACTIVE)
	    && (butPtr->selectBorder != NULL) && !butPtr->indicatorOn) {
	dpPtr->border = butPtr->selectBorder;
    }

    /*
     * Override the relief specified for the button if this is a
     * checkbutton or radiobutton and there's no indicator.
     */

    dpPtr->relief = butPtr->relief;

    if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
	if (!dpPtr->hasImageOrBitmap) {
	    dpPtr->relief = (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN
		    : TK_RELIEF_RAISED;
	}
    }

    if (butPtr->type != TYPE_LABEL &&
	(butPtr->type == TYPE_BUTTON ||
	 butPtr->indicatorOn         ||
	 dpPtr->hasImageOrBitmap)) {
	
	/*
	 * Draw this widget as a native control.
	 */
	
	return 1;
    } else {

	/*
	 * Draw this widget from scratch.
	 */
	
	return 0;
    }
}
 
/*
 *--------------------------------------------------------------
 *
................................................................................
 *     None.
 *
 * Side effects:
 *     Sets a timer to run itself again.
 *
 *--------------------------------------------------------------
 */

static void
PulseDefaultButtonProc(ClientData clientData)
{
    MacButton *mbPtr = (MacButton *)clientData;

    TkpDisplayButton(clientData);
    mbPtr->defaultPulseHandler = Tcl_CreateTimerHandler(
            PULSE_TIMER_MSECS, PulseDefaultButtonProc, clientData);
}

/*
 * Local Variables:
 * mode: objc
 * c-basic-offset: 4
 * fill-column: 79
 * coding: utf-8
 * End:
 */