Arduino/core/src/processing/core/PShapeSVG.java at master-pull115 · kenstack/Arduino

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package processing.core;

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;

import processing.xml.XMLElement;

/**

* 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 {

XMLElement element;

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(new XMLElement(parent, filename));

}

/**

* Initializes a new SVG Object from the given XMLElement.

public PShapeSVG(XMLElement svg) {

this(null, svg);

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.getStringAttribute("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.getStringAttribute("width");

String unitHeight = svg.getStringAttribute("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); // ?

}

public PShapeSVG(PShapeSVG parent, XMLElement properties) {

//super(GROUP);

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.getStringAttribute("id");

String displayStr = properties.getStringAttribute("display", "inline");

visible = !displayStr.equals("none");

String transformStr = properties.getStringAttribute("transform");

if (transformStr != null) {

matrix = parseMatrix(transformStr);

}

parseColors(properties);

parseChildren(properties);

}

protected void parseChildren(XMLElement graphics) {

XMLElement[] elements = graphics.getChildren();

children = new PShape[elements.length];

childCount = 0;

for (XMLElement elem : elements) {

PShape kid = parseChild(elem);

if (kid != null) {

addChild(kid);

}

/**

* Parse a child XML element.

* Override this method to add parsing for more SVG elements.

protected PShape parseChild(XMLElement elem) {

String name = elem.getName();

PShapeSVG shape = null;

if (name.equals("g")) {

//return new BaseObject(this, elem);