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processing/core/src/processing/core/PShapeSVG.java at patch-4 · GoToLoop/processing · GitHub
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PShapeSVG.java
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/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Part of the Processing project - http://processing.org
Copyright (c) 2006-11 Ben Fry and Casey Reas
Copyright (c) 2004-06 Michael Chang
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 2.1 as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
package
processing
.
core
;
import
processing
.
data
.*;
import
java
.
awt
.
Paint
;
import
java
.
awt
.
PaintContext
;
import
java
.
awt
.
Rectangle
;
import
java
.
awt
.
RenderingHints
;
import
java
.
awt
.
geom
.
AffineTransform
;
import
java
.
awt
.
geom
.
Point2D
;
import
java
.
awt
.
geom
.
Rectangle2D
;
import
java
.
awt
.
image
.
ColorModel
;
import
java
.
awt
.
image
.
Raster
;
import
java
.
awt
.
image
.
WritableRaster
;
import
java
.
util
.
HashMap
;
/**
* This class is not part of the Processing API and should not be used
* directly. Instead, use loadShape() and methods like it, which will make
* use of this class. Using this class directly will cause your code to break
* when combined with future versions of Processing.
* <p>
* SVG stands for Scalable Vector Graphics, a portable graphics format. It is
* a vector format so it allows for infinite resolution and relatively small
* file sizes. Most modern media software can view SVG files, including Adobe
* products, Firefox, etc. Illustrator and Inkscape can edit SVG files.
* <p>
* We have no intention of turning this into a full-featured SVG library.
* The goal of this project is a basic shape importer that is small enough
* to be included with applets, meaning that its download size should be
* in the neighborhood of 25-30k. Starting with release 0149, this library
* has been incorporated into the core via the loadShape() command, because
* vector shape data is just as important as the image data from loadImage().
* <p>
* For more sophisticated import/export, consider the
* <A HREF="http://xmlgraphics.apache.org/batik/">Batik</A>
* library from the Apache Software Foundation. Future improvements to this
* library may focus on this properly supporting a specific subset of SVG,
* for instance the simpler SVG profiles known as
* <A HREF="http://www.w3.org/TR/SVGMobile/">SVG Tiny or Basic</A>,
* although we still would not support the interactivity options.
*
* <p> <hr noshade> <p>
*
* A minimal example program using SVG:
* (assuming a working moo.svg is in your data folder)
*
* <PRE>
* PShape moo;
*
* void setup() {
* size(400, 400);
* moo = loadShape("moo.svg");
* }
* void draw() {
* background(255);
* shape(moo, mouseX, mouseY);
* }
* </PRE>
*
* This code is based on the Candy library written by Michael Chang, which was
* later revised and expanded for use as a Processing core library by Ben Fry.
* Thanks to Ricard Marxer Pinon for help with better Inkscape support in 0154.
*
* <p> <hr noshade> <p>
*
* Late October 2008 revisions from ricardmp, incorporated by fry (0154)
* <UL>
* <LI>Better style attribute handling, enabling better Inkscape support.
* </UL>
*
* October 2008 revisions by fry (Processing 0149, pre-1.0)
* <UL>
* <LI> Candy is no longer a separate library, and is instead part of core.
* <LI> Loading now works through loadShape()
* <LI> Shapes are now drawn using the new PGraphics shape() method.
* </UL>
*
* August 2008 revisions by fry (Processing 0149)
* <UL>
* <LI> Major changes to rework around PShape.
* <LI> Now implementing more of the "transform" attribute.
* </UL>
*
* February 2008 revisions by fry (Processing 0136)
* <UL>
* <LI> Added support for quadratic curves in paths (Q, q, T, and t operators)
* <LI> Support for reading SVG font data (though not rendering it yet)
* </UL>
*
* Revisions for "Candy 2" November 2006 by fry
* <UL>
* <LI> Switch to the new processing.xml library
* <LI> Several bug fixes for parsing of shape data
* <LI> Support for linear and radial gradients
* <LI> Support for additional types of shapes
* <LI> Added compound shapes (shapes with interior points)
* <LI> Added methods to get shapes from an internal table
* </UL>
*
* Revision 10/31/06 by flux
* <UL>
* <LI> Now properly supports Processing 0118
* <LI> Fixed a bunch of things for Casey's students and general buggity.
* <LI> Will now properly draw #FFFFFFFF colors (were being represented as -1)
* <LI> SVGs without <g> tags are now properly caught and loaded
* <LI> Added a method customStyle() for overriding SVG colors/styles
* <LI> Added a method SVGStyle() to go back to using SVG colors/styles
* </UL>
*
* Some SVG objects and features may not yet be supported.
* Here is a partial list of non-included features
* <UL>
* <LI> Rounded rectangles
* <LI> Drop shadow objects
* <LI> Typography
* <LI> <STRIKE>Layers</STRIKE> added for Candy 2
* <LI> Patterns
* <LI> Embedded images
* </UL>
*
* For those interested, the SVG specification can be found
* <A HREF="http://www.w3.org/TR/SVG">here</A>.
*/
public
class
PShapeSVG
extends
PShape
{
XML
element
;
/// Values between 0 and 1.
float
opacity
;
float
strokeOpacity
;
float
fillOpacity
;
Gradient
strokeGradient
;
Paint
strokeGradientPaint
;
String
strokeName
;
// id of another object, gradients only?
Gradient
fillGradient
;
Paint
fillGradientPaint
;
String
fillName
;
// id of another object
// /**
// * Initializes a new SVG Object with the given filename.
// */
// public PShapeSVG(PApplet parent, String filename) {
// // this will grab the root document, starting <svg ...>
// // the xml version and initial comments are ignored
// this(parent.loadXML(filename));
// }
/**
* Initializes a new SVG Object from the given PNode.
*/
public
PShapeSVG
(
XML
svg
) {
this
(
null
,
svg
,
true
);
if
(!
svg
.
getName
().
equals
(
"svg"
)) {
throw
new
RuntimeException
(
"root is not <svg>, it's <"
+
svg
.
getName
() +
">"
);
}
// not proper parsing of the viewBox, but will cover us for cases where
// the width and height of the object is not specified
String
viewBoxStr
=
svg
.
getString
(
"viewBox"
);
if
(
viewBoxStr
!=
null
) {
int
[]
viewBox
=
PApplet
.
parseInt
(
PApplet
.
splitTokens
(
viewBoxStr
));
width
=
viewBox
[
2
];
height
=
viewBox
[
3
];
}
// TODO if viewbox is not same as width/height, then use it to scale
// the original objects. for now, viewbox only used when width/height
// are empty values (which by the spec means w/h of "100%"
String
unitWidth
=
svg
.
getString
(
"width"
);
String
unitHeight
=
svg
.
getString
(
"height"
);
if
(
unitWidth
!=
null
) {
width
=
parseUnitSize
(
unitWidth
);
height
=
parseUnitSize
(
unitHeight
);
}
else
{
if
((
width
==
0
) || (
height
==
0
)) {
//throw new RuntimeException("width/height not specified");
PGraphics
.
showWarning
(
"The width and/or height is not "
+
"readable in the <svg> tag of this file."
);
// For the spec, the default is 100% and 100%. For purposes
// here, insert a dummy value because this is prolly just a
// font or something for which the w/h doesn't matter.
width
=
1
;
height
=
1
;
}
}
//root = new Group(null, svg);
// parseChildren(svg); // ?
}
protected
PShapeSVG
(
PShapeSVG
parent
,
XML
properties
,
boolean
parseKids
) {
// Need to set this so that findChild() works.
// Otherwise 'parent' is null until addChild() is called later.
this
.
parent
=
parent
;
if
(
parent
==
null
) {
// set values to their defaults according to the SVG spec
stroke
=
false
;
strokeColor
=
0xff000000
;
strokeWeight
=
1
;
strokeCap
=
PConstants
.
SQUARE
;
// equivalent to BUTT in svg spec
strokeJoin
=
PConstants
.
MITER
;
strokeGradient
=
null
;
strokeGradientPaint
=
null
;
strokeName
=
null
;
fill
=
true
;
fillColor
=
0xff000000
;
fillGradient
=
null
;
fillGradientPaint
=
null
;
fillName
=
null
;
//hasTransform = false;
//transformation = null; //new float[] { 1, 0, 0, 1, 0, 0 };
strokeOpacity
=
1
;
fillOpacity
=
1
;
opacity
=
1
;
}
else
{
stroke
=
parent
.
stroke
;
strokeColor
=
parent
.
strokeColor
;
strokeWeight
=
parent
.
strokeWeight
;
strokeCap
=
parent
.
strokeCap
;
strokeJoin
=
parent
.
strokeJoin
;
strokeGradient
=
parent
.
strokeGradient
;
strokeGradientPaint
=
parent
.
strokeGradientPaint
;
strokeName
=
parent
.
strokeName
;
fill
=
parent
.
fill
;
fillColor
=
parent
.
fillColor
;
fillGradient
=
parent
.
fillGradient
;
fillGradientPaint
=
parent
.
fillGradientPaint
;
fillName
=
parent
.
fillName
;
//hasTransform = parent.hasTransform;
//transformation = parent.transformation;
opacity
=
parent
.
opacity
;
}
element
=
properties
;
name
=
properties
.
getString
(
"id"
);
// @#$(* adobe illustrator mangles names of objects when re-saving
if
(
name
!=
null
) {
while
(
true
) {
String
[]
m
=
PApplet
.
match
(
name
,
"_x([A-Za-z0-9]{2})_"
);
if
(
m
==
null
)
break
;
char
repair
= (
char
)
PApplet
.
unhex
(
m
[
1
]);
name
=
name
.
replace
(
m
[
0
],
""
+
repair
);
}
}
String
displayStr
=
properties
.
getString
(
"display"
,
"inline"
);
visible
= !
displayStr
.
equals
(
"none"
);
String
transformStr
=
properties
.
getString
(
"transform"
);
if
(
transformStr
!=
null
) {
matrix
=
parseTransform
(
transformStr
);
}
if
(
parseKids
) {
parseColors
(
properties
);
parseChildren
(
properties
);
}
}
protected
void
parseChildren
(
XML
graphics
) {
XML
[]
elements
=
graphics
.
getChildren
();
children
=
new
PShape
[
elements
.
length
];
childCount
=
0
;
for
(
XML
elem
:
elements
) {
PShape
kid
=
parseChild
(
elem
);
if
(
kid
!=
null
) {
// if (kid.name != null) {
// System.out.println("adding child " + kid.name);
// }
addChild
(
kid
);
}
}
children
= (
PShape
[])
PApplet
.
subset
(
children
,
0
,
childCount
);
}
/**
* Parse a child XML element.
* Override this method to add parsing for more SVG elements.
*/
protected
PShape
parseChild
(
XML
elem
) {
// System.err.println("parsing child in pshape " + elem.getName());
String
name
=
elem
.
getName
();
PShapeSVG
shape
=
null
;
if
(
name
==
null
) {
// just some whitespace that can be ignored (hopefully)
}
else
if
(
name
.
equals
(
"g"
)) {
//return new BaseObject(this, elem);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
}
else
if
(
name
.
equals
(
"defs"
)) {
// generally this will contain gradient info, so may
// as well just throw it into a group element for parsing
//return new BaseObject(this, elem);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
}
else
if
(
name
.
equals
(
"line"
)) {
//return new Line(this, elem);
//return new BaseObject(this, elem, LINE);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
shape
.
parseLine
();
}
else
if
(
name
.
equals
(
"circle"
)) {
//return new BaseObject(this, elem, ELLIPSE);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
shape
.
parseEllipse
(
true
);
}
else
if
(
name
.
equals
(
"ellipse"
)) {
//return new BaseObject(this, elem, ELLIPSE);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
shape
.
parseEllipse
(
false
);
}
else
if
(
name
.
equals
(
"rect"
)) {
//return new BaseObject(this, elem, RECT);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
shape
.
parseRect
();
}
else
if
(
name
.
equals
(
"polygon"
)) {
//return new BaseObject(this, elem, POLYGON);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
shape
.
parsePoly
(
true
);
}
else
if
(
name
.
equals
(
"polyline"
)) {
//return new BaseObject(this, elem, POLYGON);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
shape
.
parsePoly
(
false
);
}
else
if
(
name
.
equals
(
"path"
)) {
//return new BaseObject(this, elem, PATH);
shape
=
new
PShapeSVG
(
this
,
elem
,
true
);
shape
.
parsePath
();
}
else
if
(
name
.
equals
(
"radialGradient"
)) {
return
new
RadialGradient
(
this
,
elem
);
}
else
if
(
name
.
equals
(
"linearGradient"
)) {
return
new
LinearGradient
(
this
,
elem
);
}
else
if
(
name
.
equals
(
"font"
)) {
return
new
Font
(
this
,
elem
);
// } else if (name.equals("font-face")) {
// return new FontFace(this, elem);
// } else if (name.equals("glyph") || name.equals("missing-glyph")) {
// return new FontGlyph(this, elem);
}
else
if
(
name
.
equals
(
"metadata"
)) {
// fontforge just stuffs this in as a comment
return
null
;
}
else
if
(
name
.
equals
(
"text"
)) {
// || name.equals("font")) {
PGraphics
.
showWarning
(
"Text and fonts in SVG files "
+
"are not currently supported, "
+
"convert text to outlines instead."
);
}
else
if
(
name
.
equals
(
"filter"
)) {
PGraphics
.
showWarning
(
"Filters are not supported."
);
}
else
if
(
name
.
equals
(
"mask"
)) {
PGraphics
.
showWarning
(
"Masks are not supported."
);
}
else
if
(
name
.
equals
(
"pattern"
)) {
PGraphics
.
showWarning
(
"Patterns are not supported."
);
}
else
if
(
name
.
equals
(
"stop"
)) {
// stop tag is handled by gradient parser, so don't warn about it
}
else
if
(
name
.
equals
(
"sodipodi:namedview"
)) {
// these are always in Inkscape files, the warnings get tedious
}
else
if
(!
name
.
startsWith
(
"#"
)) {
PGraphics
.
showWarning
(
"Ignoring <"
+
name
+
"> tag."
);
// new Exception().printStackTrace();
}
return
shape
;
}
protected
void
parseLine
() {
kind
=
LINE
;
family
=
PRIMITIVE
;
params
=
new
float
[] {
getFloatWithUnit
(
element
,
"x1"
),
getFloatWithUnit
(
element
,
"y1"
),
getFloatWithUnit
(
element
,
"x2"
),
getFloatWithUnit
(
element
,
"y2"
)
};
}
/**
* Handles parsing ellipse and circle tags.
* @param circle true if this is a circle and not an ellipse
*/
protected
void
parseEllipse
(
boolean
circle
) {
kind
=
ELLIPSE
;
family
=
PRIMITIVE
;
params
=
new
float
[
4
];
params
[
0
] =
getFloatWithUnit
(
element
,
"cx"
);
params
[
1
] =
getFloatWithUnit
(
element
,
"cy"
);
float
rx
,
ry
;
if
(
circle
) {
rx
=
ry
=
getFloatWithUnit
(
element
,
"r"
);
}
else
{
rx
=
getFloatWithUnit
(
element
,
"rx"
);
ry
=
getFloatWithUnit
(
element
,
"ry"
);
}
params
[
0
] -=
rx
;
params
[
1
] -=
ry
;
params
[
2
] =
rx
*
2
;
params
[
3
] =
ry
*
2
;
}
protected
void
parseRect
() {
kind
=
RECT
;
family
=
PRIMITIVE
;
params
=
new
float
[] {
getFloatWithUnit
(
element
,
"x"
),
getFloatWithUnit
(
element
,
"y"
),
getFloatWithUnit
(
element
,
"width"
),
getFloatWithUnit
(
element
,
"height"
)
};
}
/**
* Parse a polyline or polygon from an SVG file.
* @param close true if shape is closed (polygon), false if not (polyline)
*/
protected
void
parsePoly
(
boolean
close
) {
family
=
PATH
;
this
.
close
=
close
;
String
pointsAttr
=
element
.
getString
(
"points"
);
if
(
pointsAttr
!=
null
) {
String
[]
pointsBuffer
=
PApplet
.
splitTokens
(
pointsAttr
);
vertexCount
=
pointsBuffer
.
length
;
vertices
=
new
float
[
vertexCount
][
2
];
for
(
int
i
=
0
;
i
<
vertexCount
;
i
++) {
String
pb
[] =
PApplet
.
split
(
pointsBuffer
[
i
],
','
);
vertices
[
i
][
X
] =
Float
.
valueOf
(
pb
[
0
]).
floatValue
();
vertices
[
i
][
Y
] =
Float
.
valueOf
(
pb
[
1
]).
floatValue
();
}
}
}
protected
void
parsePath
() {
family
=
PATH
;
kind
=
0
;
String
pathData
=
element
.
getString
(
"d"
);
if
(
pathData
==
null
||
PApplet
.
trim
(
pathData
).
length
() ==
0
) {
return
;
}
char
[]
pathDataChars
=
pathData
.
toCharArray
();
StringBuilder
pathBuffer
=
new
StringBuilder
();
boolean
lastSeparate
=
false
;
for
(
int
i
=
0
;
i
<
pathDataChars
.
length
;
i
++) {
char
c
=
pathDataChars
[
i
];
boolean
separate
=
false
;
if
(
c
==
'M'
||
c
==
'm'
||
c
==
'L'
||
c
==
'l'
||
c
==
'H'
||
c
==
'h'
||
c
==
'V'
||
c
==
'v'
||
c
==
'C'
||
c
==
'c'
||
// beziers
c
==
'S'
||
c
==
's'
||
c
==
'Q'
||
c
==
'q'
||
// quadratic beziers
c
==
'T'
||
c
==
't'
||
c
==
'A'
||
c
==
'a'
||
// elliptical arc
c
==
'Z'
||
c
==
'z'
||
// closepath
c
==
','
) {
separate
=
true
;
if
(
i
!=
0
) {
pathBuffer
.
append
(
"|"
);
}
}
if
(
c
==
'Z'
||
c
==
'z'
) {
separate
=
false
;
}
if
(
c
==
'-'
&& !
lastSeparate
) {
// allow for 'e' notation in numbers, e.g. 2.10e-9
// http://dev.processing.org/bugs/show_bug.cgi?id=1408
if
(
i
==
0
||
pathDataChars
[
i
-
1
] !=
'e'
) {
pathBuffer
.
append
(
"|"
);
}
}
if
(
c
!=
','
) {
pathBuffer
.
append
(
c
);
//"" + pathDataBuffer.charAt(i));
}
if
(
separate
&&
c
!=
','
&&
c
!=
'-'
) {
pathBuffer
.
append
(
"|"
);
}
lastSeparate
=
separate
;
}
// use whitespace constant to get rid of extra spaces and CR or LF
String
[]
pathTokens
=
PApplet
.
splitTokens
(
pathBuffer
.
toString
(),
"|"
+
WHITESPACE
);
vertices
=
new
float
[
pathTokens
.
length
][
2
];
vertexCodes
=
new
int
[
pathTokens
.
length
];
float
cx
=
0
;
float
cy
=
0
;
int
i
=
0
;
char
implicitCommand
=
'\0'
;
// char prevCommand = '\0';
boolean
prevCurve
=
false
;
float
ctrlX
,
ctrlY
;
// store values for closepath so that relative coords work properly
float
movetoX
=
0
;
float
movetoY
=
0
;
while
(
i
<
pathTokens
.
length
) {
char
c
=
pathTokens
[
i
].
charAt
(
0
);
if
(((
c
>=
'0'
&&
c
<=
'9'
) || (
c
==
'-'
)) &&
implicitCommand
!=
'\0'
) {
c
=
implicitCommand
;
i
--;
}
else
{
implicitCommand
=
c
;
}
switch
(
c
) {
case
'M'
:
// M - move to (absolute)
cx
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
cy
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
movetoX
=
cx
;
movetoY
=
cy
;
parsePathMoveto
(
cx
,
cy
);
implicitCommand
=
'L'
;
i
+=
3
;
break
;
case
'm'
:
// m - move to (relative)
cx
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
cy
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
movetoX
=
cx
;
movetoY
=
cy
;
parsePathMoveto
(
cx
,
cy
);
implicitCommand
=
'l'
;
i
+=
3
;
break
;
case
'L'
:
cx
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
cy
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
parsePathLineto
(
cx
,
cy
);
i
+=
3
;
break
;
case
'l'
:
cx
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
cy
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
parsePathLineto
(
cx
,
cy
);
i
+=
3
;
break
;
// horizontal lineto absolute
case
'H'
:
cx
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
parsePathLineto
(
cx
,
cy
);
i
+=
2
;
break
;
// horizontal lineto relative
case
'h'
:
cx
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
parsePathLineto
(
cx
,
cy
);
i
+=
2
;
break
;
case
'V'
:
cy
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
parsePathLineto
(
cx
,
cy
);
i
+=
2
;
break
;
case
'v'
:
cy
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
parsePathLineto
(
cx
,
cy
);
i
+=
2
;
break
;
// C - curve to (absolute)
case
'C'
: {
float
ctrlX1
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
ctrlY1
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
ctrlX2
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
float
ctrlY2
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]);
float
endX
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
5
]);
float
endY
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
6
]);
parsePathCurveto
(
ctrlX1
,
ctrlY1
,
ctrlX2
,
ctrlY2
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
7
;
prevCurve
=
true
;
}
break
;
// c - curve to (relative)
case
'c'
: {
float
ctrlX1
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
ctrlY1
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
ctrlX2
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
float
ctrlY2
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]);
float
endX
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
5
]);
float
endY
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
6
]);
parsePathCurveto
(
ctrlX1
,
ctrlY1
,
ctrlX2
,
ctrlY2
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
7
;
prevCurve
=
true
;
}
break
;
// S - curve to shorthand (absolute)
// Draws a cubic Bézier curve from the current point to (x,y). The first
// control point is assumed to be the reflection of the second control
// point on the previous command relative to the current point.
// (x2,y2) is the second control point (i.e., the control point
// at the end of the curve). S (uppercase) indicates that absolute
// coordinates will follow; s (lowercase) indicates that relative
// coordinates will follow. Multiple sets of coordinates may be specified
// to draw a polybézier. At the end of the command, the new current point
// becomes the final (x,y) coordinate pair used in the polybézier.
case
'S'
: {
// (If there is no previous command or if the previous command was not
// an C, c, S or s, assume the first control point is coincident with
// the current point.)
if
(!
prevCurve
) {
ctrlX
=
cx
;
ctrlY
=
cy
;
}
else
{
float
ppx
=
vertices
[
vertexCount
-
2
][
X
];
float
ppy
=
vertices
[
vertexCount
-
2
][
Y
];
float
px
=
vertices
[
vertexCount
-
1
][
X
];
float
py
=
vertices
[
vertexCount
-
1
][
Y
];
ctrlX
=
px
+ (
px
-
ppx
);
ctrlY
=
py
+ (
py
-
ppy
);
}
float
ctrlX2
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
ctrlY2
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
endX
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
float
endY
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]);
parsePathCurveto
(
ctrlX
,
ctrlY
,
ctrlX2
,
ctrlY2
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
5
;
prevCurve
=
true
;
}
break
;
// s - curve to shorthand (relative)
case
's'
: {
if
(!
prevCurve
) {
ctrlX
=
cx
;
ctrlY
=
cy
;
}
else
{
float
ppx
=
vertices
[
vertexCount
-
2
][
X
];
float
ppy
=
vertices
[
vertexCount
-
2
][
Y
];
float
px
=
vertices
[
vertexCount
-
1
][
X
];
float
py
=
vertices
[
vertexCount
-
1
][
Y
];
ctrlX
=
px
+ (
px
-
ppx
);
ctrlY
=
py
+ (
py
-
ppy
);
}
float
ctrlX2
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
ctrlY2
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
endX
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
float
endY
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]);
parsePathCurveto
(
ctrlX
,
ctrlY
,
ctrlX2
,
ctrlY2
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
5
;
prevCurve
=
true
;
}
break
;
// Q - quadratic curve to (absolute)
// Draws a quadratic Bézier curve from the current point to (x,y) using
// (x1,y1) as the control point. Q (uppercase) indicates that absolute
// coordinates will follow; q (lowercase) indicates that relative
// coordinates will follow. Multiple sets of coordinates may be specified
// to draw a polybézier. At the end of the command, the new current point
// becomes the final (x,y) coordinate pair used in the polybézier.
case
'Q'
: {
ctrlX
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
ctrlY
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
endX
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
float
endY
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]);
//parsePathQuadto(cx, cy, ctrlX, ctrlY, endX, endY);
parsePathQuadto
(
ctrlX
,
ctrlY
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
5
;
prevCurve
=
true
;
}
break
;
// q - quadratic curve to (relative)
case
'q'
: {
ctrlX
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
ctrlY
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
endX
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
float
endY
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]);
//parsePathQuadto(cx, cy, ctrlX, ctrlY, endX, endY);
parsePathQuadto
(
ctrlX
,
ctrlY
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
5
;
prevCurve
=
true
;
}
break
;
// T - quadratic curveto shorthand (absolute)
// The control point is assumed to be the reflection of the control
// point on the previous command relative to the current point.
case
'T'
: {
// If there is no previous command or if the previous command was
// not a Q, q, T or t, assume the control point is coincident
// with the current point.
if
(!
prevCurve
) {
ctrlX
=
cx
;
ctrlY
=
cy
;
}
else
{
float
ppx
=
vertices
[
vertexCount
-
2
][
X
];
float
ppy
=
vertices
[
vertexCount
-
2
][
Y
];
float
px
=
vertices
[
vertexCount
-
1
][
X
];
float
py
=
vertices
[
vertexCount
-
1
][
Y
];
ctrlX
=
px
+ (
px
-
ppx
);
ctrlY
=
py
+ (
py
-
ppy
);
}
float
endX
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
endY
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
//parsePathQuadto(cx, cy, ctrlX, ctrlY, endX, endY);
parsePathQuadto
(
ctrlX
,
ctrlY
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
3
;
prevCurve
=
true
;
}
break
;
// t - quadratic curveto shorthand (relative)
case
't'
: {
if
(!
prevCurve
) {
ctrlX
=
cx
;
ctrlY
=
cy
;
}
else
{
float
ppx
=
vertices
[
vertexCount
-
2
][
X
];
float
ppy
=
vertices
[
vertexCount
-
2
][
Y
];
float
px
=
vertices
[
vertexCount
-
1
][
X
];
float
py
=
vertices
[
vertexCount
-
1
][
Y
];
ctrlX
=
px
+ (
px
-
ppx
);
ctrlY
=
py
+ (
py
-
ppy
);
}
float
endX
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
endY
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
//parsePathQuadto(cx, cy, ctrlX, ctrlY, endX, endY);
parsePathQuadto
(
ctrlX
,
ctrlY
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
3
;
prevCurve
=
true
;
}
break
;
// A - elliptical arc to (absolute)
case
'A'
: {
float
rx
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
ry
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
angle
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
boolean
fa
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]) !=
0
;
boolean
fs
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
5
]) !=
0
;
float
endX
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
6
]);
float
endY
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
7
]);
parsePathArcto
(
cx
,
cy
,
rx
,
ry
,
angle
,
fa
,
fs
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
8
;
prevCurve
=
true
;
}
break
;
// a - elliptical arc to (relative)
case
'a'
: {
float
rx
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
1
]);
float
ry
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
2
]);
float
angle
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
3
]);
boolean
fa
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
4
]) !=
0
;
boolean
fs
=
PApplet
.
parseFloat
(
pathTokens
[
i
+
5
]) !=
0
;
float
endX
=
cx
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
6
]);
float
endY
=
cy
+
PApplet
.
parseFloat
(
pathTokens
[
i
+
7
]);
parsePathArcto
(
cx
,
cy
,
rx
,
ry
,
angle
,
fa
,
fs
,
endX
,
endY
);
cx
=
endX
;
cy
=
endY
;
i
+=
8
;
prevCurve
=
true
;
}
break
;
case
'Z'
:
case
'z'
:
// since closing the path, the 'current' point needs
// to return back to the last moveto location.
// http://code.google.com/p/processing/issues/detail?id=1058
cx
=
movetoX
;
cy
=
movetoY
;
close
=
true
;
i
++;
break
;
default
:
String
parsed
=
PApplet
.
join
(
PApplet
.
subset
(
pathTokens
,
0
,
i
),
","
);
String
unparsed
=
PApplet
.
join
(
PApplet
.
subset
(
pathTokens
,
i
),
","
);
System
.
err
.
println
(
"parsed: "
+
parsed
);
System
.
err
.
println
(
"unparsed: "
+
unparsed
);
if
(
pathTokens
[
i
].
equals
(
"a"
) ||
pathTokens
[
i
].
equals
(
"A"
)) {
String
msg
=
"Sorry, elliptical arc support for SVG files "
+
"is not yet implemented (See issue 130 for updates)"
;
throw
new
RuntimeException
(
msg
);
}
throw
new
RuntimeException
(
"shape command not handled: "
+
pathTokens
[
i
]);
}
// prevCommand = c;
}
}
// private void parsePathCheck(int num) {
// if (vertexCount + num-1 >= vertices.length) {
// //vertices = (float[][]) PApplet.expand(vertices);
// float[][] temp = new float[vertexCount << 1][2];
// System.arraycopy(vertices, 0, temp, 0, vertexCount);
// vertices = temp;
// }
// }
private
void
parsePathVertex
(
float
x
,
float
y
) {
if
(
vertexCount
==
vertices
.
length
) {
//vertices = (float[][]) PApplet.expand(vertices);
float
[][]
temp
=
new
float
[
vertexCount
<<
1
][
2
];
System
.
arraycopy
(
vertices
,
0
,
temp
,
0
,
vertexCount
);
vertices
=
temp
;
}
vertices
[
vertexCount
][
X
] =
x
;
vertices
[
vertexCount
][
Y
] =
y
;
vertexCount
++;
}
private
void
parsePathCode
(
int
what
) {
if
(
vertexCodeCount
==
vertexCodes
.
length
) {
vertexCodes
=
PApplet
.
expand
(
vertexCodes
);
}
vertexCodes
[
vertexCodeCount
++] =
what
;
}
private
void
parsePathMoveto
(
float
px
,
float
py
) {
if
(
vertexCount
>
0
) {
parsePathCode
(
BREAK
);
}
parsePathCode
(
VERTEX
);
parsePathVertex
(
px
,
py
);
}
private
void
parsePathLineto
(
float
px
,
float
py
) {
parsePathCode
(
VERTEX
);
parsePathVertex
(
px
,
py
);
}
private
void
parsePathCurveto
(
float
x1
,
float
y1
,
float
x2
,
float
y2
,
float
x3
,
float
y3
) {
parsePathCode
(
BEZIER_VERTEX
);
parsePathVertex
(
x1
,
y1
);
parsePathVertex
(
x2
,
y2
);
parsePathVertex
(
x3
,
y3
);
}
// private void parsePathQuadto(float x1, float y1,
// float cx, float cy,
// float x2, float y2) {
// //System.out.println("quadto: " + x1 + "," + y1 + " " + cx + "," + cy + " " + x2 + "," + y2);
//// parsePathCode(BEZIER_VERTEX);
// parsePathCode(QUAD_BEZIER_VERTEX);
// // x1/y1 already covered by last moveto, lineto, or curveto
//
// parsePathVertex(x1 + ((cx-x1)*2/3.0f), y1 + ((cy-y1)*2/3.0f));
// parsePathVertex(x2 + ((cx-x2)*2/3.0f), y2 + ((cy-y2)*2/3.0f));
// parsePathVertex(x2, y2);
// }
private
void
parsePathQuadto
(
float
cx
,
float
cy
,
float
x2
,
float
y2
) {
//System.out.println("quadto: " + x1 + "," + y1 + " " + cx + "," + cy + " " + x2 + "," + y2);
// parsePathCode(BEZIER_VERTEX);
parsePathCode
(
QUADRATIC_VERTEX
);
// x1/y1 already covered by last moveto, lineto, or curveto
parsePathVertex
(
cx
,
cy
);
parsePathVertex
(
x2
,
y2
);
}
// Approximates elliptical arc by several bezier segments.
// Meets SVG standard requirements from:
// http://www.w3.org/TR/SVG/paths.html#PathDataEllipticalArcCommands
// http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
// Based on arc to bezier curve equations from:
// http://www.spaceroots.org/documents/ellipse/node22.html
private
void
parsePathArcto
(
float
x1
,
float
y1
,
float
rx
,
float
ry
,
float
angle
,
boolean
fa
,
boolean
fs
,
float
x2
,
float
y2
) {
if
(
x1
==
x2
&&
y1
==
y2
)
return
;
if
(
rx
==
0
||
ry
==
0
) {
parsePathLineto
(
x2
,
y2
);
return
; }
rx
=
PApplet
.
abs
(
rx
);
ry
=
PApplet
.
abs
(
ry
);
float
phi
=
PApplet
.
radians
(((
angle
%
360
) +
360
) %
360
);
float
cosPhi
=
PApplet
.
cos
(
phi
),
sinPhi
=
PApplet
.
sin
(
phi
);
float
x1r
= (
cosPhi
* (
x1
-
x2
) +
sinPhi
* (
y1
-
y2
)) /
2
;
float
y1r
= (-
sinPhi
* (
x1
-
x2
) +
cosPhi
* (
y1
-
y2
)) /
2
;
float
cxr
,
cyr
;
{
float
A
= (
x1r
*
x1r
) / (
rx
*
rx
) + (
y1r
*
y1r
) / (
ry
*
ry
);
if
(
A
>
1
) {
// No solution, scale ellipse up according to SVG standard
float
sqrtA
=
PApplet
.
sqrt
(
A
);
rx
*=
sqrtA
;
cxr
=
0
;
ry
*=
sqrtA
;
cyr
=
0
;
}
else
{
float
k
= ((
fa
==
fs
) ? -
1f
:
1f
) *
PApplet
.
sqrt
((
rx
*
rx
*
ry
*
ry
) / ((
rx
*
rx
*
y1r
*
y1r
) + (
ry
*
ry
*
x1r
*
x1r
)) -
1f
);
cxr
=
k
*
rx
*
y1r
/
ry
;
cyr
= -
k
*
ry
*
x1r
/
rx
;
}
}
float
cx
=
cosPhi
*
cxr
-
sinPhi
*
cyr
+ (
x1
+
x2
) /
2
;
float
cy
=
sinPhi
*
cxr
+
cosPhi
*
cyr
+ (
y1
+
y2
) /
2
;
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