/*
* Gradient.java
*
*
* The Salamander Project - 2D and 3D graphics libraries in Java
* Copyright (C) 2004 Mark McKay
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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
*
* Mark McKay can be contacted at mark@kitfox.com. Salamander and other
* projects can be found at http://www.kitfox.com
*
* Created on January 26, 2004, 3:25 AM
*/
package com.kitfox.svg;
import com.kitfox.svg.xml.StyleAttribute;
import java.net.*;
import java.util.*;
import java.awt.geom.*;
import java.awt.*;
import java.awt.image.*;
import com.kitfox.svg.pattern.*;
import com.kitfox.svg.xml.*;
import org.xml.sax.*;
/**
* @author Mark McKay
* @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
*/
public class PatternSVG extends FillElement {
public static final int GU_OBJECT_BOUNDING_BOX = 0;
public static final int GU_USER_SPACE_ON_USE = 1;
int gradientUnits = GU_OBJECT_BOUNDING_BOX;
float x;
float y;
float width;
float height;
AffineTransform patternXform = new AffineTransform();
Rectangle2D.Float viewBox;
Paint texPaint;
/** Creates a new instance of Gradient */
public PatternSVG() {
}
/*
public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
{
//Load style string
super.loaderStartElement(helper, attrs, parent);
String href = attrs.getValue("xlink:href");
//If we have a link to another pattern, initialize ourselves with it's values
if (href != null)
{
//System.err.println("Gradient.loaderStartElement() href '" + href + "'");
try {
URI src = getXMLBase().resolve(href);
// URL url = srcUrl.toURL();
// URL url = new URL(helper.docRoot, href);
PatternSVG patSrc = (PatternSVG)helper.universe.getElement(src);
gradientUnits = patSrc.gradientUnits;
x = patSrc.x;
y = patSrc.y;
width = patSrc.width;
height = patSrc.height;
viewBox = patSrc.viewBox;
patternXform.setTransform(patSrc.patternXform);
members.addAll(patSrc.members);
}
catch (Exception e)
{
e.printStackTrace();
}
}
String gradientUnits = attrs.getValue("gradientUnits");
if (gradientUnits != null)
{
if (gradientUnits.toLowerCase().equals("userspaceonuse")) this.gradientUnits = GU_USER_SPACE_ON_USE;
else this.gradientUnits = GU_OBJECT_BOUNDING_BOX;
}
String patternTransform = attrs.getValue("patternTransform");
if (patternTransform != null)
{
patternXform = parseTransform(patternTransform);
}
String x = attrs.getValue("x");
String y = attrs.getValue("y");
String width = attrs.getValue("width");
String height = attrs.getValue("height");
if (x != null) this.x = XMLParseUtil.parseFloat(x);
if (y != null) this.y = XMLParseUtil.parseFloat(y);
if (width != null) this.width = XMLParseUtil.parseFloat(width);
if (height != null) this.height = XMLParseUtil.parseFloat(height);
String viewBoxStrn = attrs.getValue("viewBox");
if (viewBoxStrn != null)
{
float[] dim = XMLParseUtil.parseFloatList(viewBoxStrn);
viewBox = new Rectangle2D.Float(dim[0], dim[1], dim[2], dim[3]);
}
}
*/
/**
* Called after the start element but before the end element to indicate
* each child tag that has been processed
*/
public void loaderAddChild(SVGLoaderHelper helper, SVGElement child) throws SVGElementException
{
super.loaderAddChild(helper, child);
// members.add(child);
}
protected void build() throws SVGException
{
super.build();
StyleAttribute sty = new StyleAttribute();
//Load style string
String href = null;
if (getPres(sty.setName("xlink:href"))) href = sty.getStringValue();
//String href = attrs.getValue("xlink:href");
//If we have a link to another pattern, initialize ourselves with it's values
if (href != null)
{
//System.err.println("Gradient.loaderStartElement() href '" + href + "'");
try {
URI src = getXMLBase().resolve(href);
PatternSVG patSrc = (PatternSVG)diagram.getUniverse().getElement(src);
gradientUnits = patSrc.gradientUnits;
x = patSrc.x;
y = patSrc.y;
width = patSrc.width;
height = patSrc.height;
viewBox = patSrc.viewBox;
patternXform.setTransform(patSrc.patternXform);
children.addAll(patSrc.children);
}
catch (Exception e)
{
e.printStackTrace();
}
}
String gradientUnits = "";
if (getPres(sty.setName("gradientUnits"))) gradientUnits = sty.getStringValue().toLowerCase();
if (gradientUnits.equals("userspaceonuse")) this.gradientUnits = GU_USER_SPACE_ON_USE;
else this.gradientUnits = GU_OBJECT_BOUNDING_BOX;
String patternTransform = "";
if (getPres(sty.setName("patternTransform"))) patternTransform = sty.getStringValue();
patternXform = parseTransform(patternTransform);
if (getPres(sty.setName("x"))) x = sty.getFloatValueWithUnits();
if (getPres(sty.setName("y"))) y = sty.getFloatValueWithUnits();
if (getPres(sty.setName("width"))) width = sty.getFloatValueWithUnits();
if (getPres(sty.setName("height"))) height = sty.getFloatValueWithUnits();
if (getPres(sty.setName("viewBox")))
{
float[] dim = sty.getFloatList();
viewBox = new Rectangle2D.Float(dim[0], dim[1], dim[2], dim[3]);
}
preparePattern();
}
/*
public void loaderEndElement(SVGLoaderHelper helper)
{
build();
}
*/
protected void preparePattern() throws SVGException
{
//For now, treat all fills as UserSpaceOnUse. Otherwise, we'll need
// a different paint for every object.
int tileWidth = (int)width;
int tileHeight = (int)height;
float stretchX = 1f, stretchY = 1f;
if (!patternXform.isIdentity())
{
//Scale our source tile so that we can have nice sampling from it.
float xlateX = (float)patternXform.getTranslateX();
float xlateY = (float)patternXform.getTranslateY();
Point2D.Float pt = new Point2D.Float(), pt2 = new Point2D.Float();
pt.setLocation(width, 0);
patternXform.transform(pt, pt2);
pt2.x -= xlateX;
pt2.y -= xlateY;
stretchX = (float)Math.sqrt(pt2.x * pt2.x + pt2.y * pt2.y) * 1.5f / width;
pt.setLocation(height, 0);
patternXform.transform(pt, pt2);
pt2.x -= xlateX;
pt2.y -= xlateY;
stretchY = (float)Math.sqrt(pt2.x * pt2.x + pt2.y * pt2.y) * 1.5f / height;
tileWidth *= stretchX;
tileHeight *= stretchY;
}
if (tileWidth == 0 || tileHeight == 0)
{
//Use defaults if tile has degenerate size
return;
}
BufferedImage buf = new BufferedImage(tileWidth, tileHeight, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = buf.createGraphics();
g.setClip(0, 0, tileWidth, tileHeight);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
for (Iterator it = children.iterator(); it.hasNext();)
{
SVGElement ele = (SVGElement)it.next();
if (ele instanceof RenderableElement)
{
AffineTransform xform = new AffineTransform();
if (viewBox == null)
{
xform.translate(-x, -y);
}
else
{
xform.scale(tileWidth / viewBox.width, tileHeight / viewBox.height);
xform.translate(-viewBox.x, -viewBox.y);
}
g.setTransform(xform);
((RenderableElement)ele).render(g);
}
}
g.dispose();
//try {
//javax.imageio.ImageIO.write(buf, "png", new java.io.File("c:\\tmp\\texPaint.png"));
//} catch (Exception e ) {}
if (patternXform.isIdentity())
{
texPaint = new TexturePaint(buf, new Rectangle2D.Float(x, y, width, height));
}
else
{
patternXform.scale(1 / stretchX, 1 / stretchY);
texPaint = new PatternPaint(buf, patternXform);
}
}
public Paint getPaint(Rectangle2D bounds, AffineTransform xform)
{
return texPaint;
}
/**
* Updates all attributes in this diagram associated with a time event.
* Ie, all attributes with track information.
* @return - true if this node has changed state as a result of the time
* update
*/
public boolean updateTime(double curTime) throws SVGException
{
//Patterns don't change state
return false;
}
}
