org.pushingpixels.flamingo.api.svg.SvgBatikIcon Maven / Gradle / Ivy
/*
* Copyright (c) 2005-2010 Flamingo Kirill Grouchnikov. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* o Neither the name of Flamingo Kirill Grouchnikov nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.pushingpixels.flamingo.api.svg;
import java.awt.*;
import java.awt.geom.Dimension2D;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.*;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.swing.Icon;
import org.apache.batik.bridge.InterruptedBridgeException;
import org.apache.batik.bridge.UserAgentAdapter;
import org.apache.batik.swing.gvt.*;
import org.apache.batik.transcoder.*;
import org.apache.batik.transcoder.image.ImageTranscoder;
import org.apache.batik.util.EventDispatcher;
import org.apache.batik.util.EventDispatcher.Dispatcher;
/**
* A Swing Icon that draws an SVG image.
*
* @author Cameron McCormack
* @authot Kirill Grouchnikov
*/
abstract class SvgBatikIcon extends UserAgentAdapter implements Icon {
/**
* Contains all precomputed images.
*/
protected Map cachedImages = new HashMap();
/**
* The width of the rendered image.
*/
protected int width;
/**
* The height of the rendered image.
*/
protected int height;
/**
* SVG byte array.
*/
protected byte[] svgBytes;
/**
* The listeners.
*/
protected List listeners;
private static ExecutorService loadService = Executors
.newFixedThreadPool(5);
/**
* Create a new SVG icon.
*
* @param inputStream
* The input stream to read the SVG document from.
* @param w
* The width of the icon.
* @param h
* The height of the icon.
* @throws IOException
* in case any I/O operation failed.
*/
public SvgBatikIcon(InputStream inputStream, int w, int h)
throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] b = new byte[1024];
while (true) {
int count = inputStream.read(b);
if (count < 0)
break;
baos.write(b, 0, count);
}
this.svgBytes = baos.toByteArray();
this.width = w;
this.height = h;
this.listeners = Collections.synchronizedList(new LinkedList());
this.renderGVTTree(this.width, this.height);
}
/**
* A transcoder that generates a BufferedImage.
*/
public static class BufferedImageTranscoder extends ImageTranscoder {
/**
* The BufferedImage generated from the SVG document.
*/
protected BufferedImage bufferedImage;
/**
* Creates a new ARGB image with the specified dimension.
*
* @param width
* the image width in pixels
* @param height
* the image height in pixels
*/
@Override
public BufferedImage createImage(int width, int height) {
return new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
}
/**
* Writes the specified image to the specified output.
*
* @param img
* the image to write
* @param output
* the output where to store the image
* @param TranscoderException
* if an error occured while storing the image
*/
@Override
public void writeImage(BufferedImage img, TranscoderOutput output)
throws TranscoderException {
bufferedImage = img;
}
/**
* Returns the {@link BufferedImage} generated from the SVG document.
*
* @return {@link BufferedImage} generated from the SVG document.
*/
public BufferedImage getBufferedImage() {
return bufferedImage;
}
/**
* Set the dimensions to be used for the image.
*
* @param w
* Width.
* @param h
* Height.
*/
public void setDimensions(int w, int h) {
hints.put(KEY_WIDTH, new Float(w));
hints.put(KEY_HEIGHT, new Float(h));
}
}
/*
* (non-Javadoc)
*
* @see javax.swing.Icon#getIconWidth()
*/
public int getIconWidth() {
return width;
}
/*
* (non-Javadoc)
*
* @see javax.swing.Icon#getIconHeight()
*/
public int getIconHeight() {
return height;
}
/*
* (non-Javadoc)
*
* @see javax.swing.Icon#paintIcon(java.awt.Component, java.awt.Graphics,
* int, int)
*/
public void paintIcon(Component c, Graphics g, int x, int y) {
BufferedImage image = this.cachedImages.get(this.getIconWidth() + ":"
+ this.getIconHeight());
if (image != null) {
int dx = (this.width - image.getWidth()) / 2;
int dy = (this.height - image.getHeight()) / 2;
g.drawImage(image, x + dx, y + dy, null);
}
}
// UserAgent /////////////////////////////////////////////////////////////
/**
* Returns the default size of this user agent.
*/
@Override
public Dimension2D getViewportSize() {
return new Dimension(width, height);
}
/**
* Sets the preferred size for this icon. The rendering is
* scheduled automatically.
*
* @param dim
* Preferred size.
*/
public synchronized void setPreferredSize(Dimension dim) {
if ((this.width == dim.width) && (this.height == dim.height))
return;
this.width = dim.width;
this.height = dim.height;
this.renderGVTTree(this.width, this.height);
}
/**
* Returns the SVG bytes of the loaded SVG image.
*
* @return SVG bytes of the loaded SVG image.
*/
public byte[] getSvgBytes() {
return this.svgBytes;
}
/**
* Fires event.
*
* @param dispatcher
* Event dispatcher.
* @param event
* Event data.
*/
public void fireEvent(Dispatcher dispatcher, Object event) {
EventDispatcher.fireEvent(dispatcher, listeners, event, true);
}
/**
* Renders the GVT tree.
*
* @param renderWidth
* Requested rendering width.
* @param renderHeight
* Requested rendering height.
* @return If true, the image is already computed and cached.
*/
protected synchronized boolean renderGVTTree(final int renderWidth,
final int renderHeight) {
String cacheKey = renderWidth + ":" + renderHeight;
if (this.cachedImages.containsKey(cacheKey)) {
return true;
}
Runnable load = new Runnable() {
@Override
public void run() {
GVTTreeRendererEvent ev = new GVTTreeRendererEvent(this, null);
try {
ev = new GVTTreeRendererEvent(this, null);
fireEvent(startedDispatcher, ev);
BufferedImageTranscoder t = new BufferedImageTranscoder();
if (renderWidth != 0 && renderHeight != 0) {
t.setDimensions(renderWidth, renderHeight);
}
InputStream is = new ByteArrayInputStream(svgBytes);
TranscoderInput ti = new TranscoderInput(is);
t.transcode(ti, null);
BufferedImage bufferedImage = t.getBufferedImage();
String key = bufferedImage.getWidth() + ":"
+ bufferedImage.getHeight();
if (bufferedImage != null) {
synchronized (SvgBatikIcon.this) {
cachedImages.put(key, bufferedImage);
}
ev = new GVTTreeRendererEvent(this, bufferedImage);
fireEvent(completedDispatcher, ev);
}
} catch (InterruptedBridgeException e) {
// this sometimes happens with SVG Fonts since the glyphs
// are not built till the rendering stage
fireEvent(cancelledDispatcher, ev);
} catch (ThreadDeath td) {
fireEvent(failedDispatcher, ev);
throw td;
} catch (Throwable t) {
fireEvent(failedDispatcher, ev);
}
}
};
loadService.execute(load);
return false;
}
/**
* Adds a {@link GVTTreeRendererListener} to this {@link GVTTreeRenderer}.
*
* @param l
* Listener to add.
*/
@SuppressWarnings("unchecked")
public void addGVTTreeRendererListener(GVTTreeRendererListener l) {
listeners.add(l);
}
/**
* Removes a {@link GVTTreeRendererListener}ner from this
* {@link GVTTreeRenderer}.
*
* @param l
* Listener to remove.
*/
public void removeGVTTreeRendererListener(GVTTreeRendererListener l) {
listeners.remove(l);
}
/**
* Dispatcher for GVT tree rendering completion.
*/
static Dispatcher completedDispatcher = new Dispatcher() {
public void dispatch(Object listener, Object event) {
((GVTTreeRendererListener) listener)
.gvtRenderingCompleted((GVTTreeRendererEvent) event);
}
};
/**
* Dispatcher for GVT tree rendering start.
*/
static Dispatcher startedDispatcher = new Dispatcher() {
public void dispatch(Object listener, Object event) {
((GVTTreeRendererListener) listener)
.gvtRenderingStarted((GVTTreeRendererEvent) event);
}
};
/**
* Dispatcher for GVT tree rendering fail.
*/
static Dispatcher failedDispatcher = new Dispatcher() {
public void dispatch(Object listener, Object event) {
((GVTTreeRendererListener) listener)
.gvtRenderingFailed((GVTTreeRendererEvent) event);
}
};
/**
* Dispatcher for GVT tree rendering cancel.
*/
static Dispatcher cancelledDispatcher = new Dispatcher() {
public void dispatch(Object listener, Object event) {
((GVTTreeRendererListener) listener)
.gvtRenderingCancelled((GVTTreeRendererEvent) event);
}
};
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy