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added transparency to gif image animation and the integration to the

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YaCy httpd for on-the-fly generated gifs (including animated gifs)
pull/1/head
Michael Peter Christen 12 years ago
parent a1fffe8e86
commit c1a2175fbc
4 changed files with 71 additions and 14 deletions
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6
source/net/yacy/kelondro/util/ByteBuffer.java
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@ -52,6 +52,12 @@ public final class ByteBuffer extends OutputStream {
this.offset = 0;
}
public ByteBuffer(final byte[] bb) {
this.buffer = bb;
this.length = bb.length;
this.offset = 0;
}
public ByteBuffer(final String s) {
this.buffer = UTF8.getBytes(s);
this.length = this.buffer.length;

37
source/net/yacy/peers/graphics/EncodedImage.java
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@ -1,17 +1,52 @@
/**
* EncodedImage
* Copyright 2010 by Michael Christen
* First released 28.07.2010 at http://yacy.net
*
* 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 program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
package net.yacy.peers.graphics;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import net.yacy.kelondro.util.ByteBuffer;
import net.yacy.visualization.AnimationGIF;
import net.yacy.visualization.RasterPlotter;
public class EncodedImage {
private ByteBuffer image;
private String extension;
public EncodedImage(final RasterPlotter sourceImage, final String targetExt) {
this.image = "png".equals(targetExt) ? sourceImage.exportPng() : RasterPlotter.exportImage(sourceImage.getImage(), targetExt);
this.extension = targetExt;
}
public EncodedImage(final AnimationGIF sourceImage) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
bos.write(sourceImage.get());
bos.close();
} catch (IOException e) {
}
this.image = new ByteBuffer(bos.toByteArray());
this.extension = "gif";
}
public ByteBuffer getImage() {
return this.image;
}

2
source/net/yacy/server/http/HTTPDFileHandler.java
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@ -574,7 +574,7 @@ public final class HTTPDFileHandler {
servletProperties templatePatterns = null;
Date targetDate;
if ((targetClass != null) && (path.endsWith("png"))) {
if ((targetClass != null) && ((path.endsWith("png") || path.endsWith("gif")))) {
// call an image-servlet to produce an on-the-fly - generated image
Object img = null;
requestHeader.put(HeaderFramework.CONNECTION_PROP_CLIENTIP, (String) conProp.get(HeaderFramework.CONNECTION_PROP_CLIENTIP));

40
source/net/yacy/visualization/AnimationGIF.java
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@ -2,10 +2,6 @@
* AnimationGIF
* Copyright 2010 by Michael Christen
* First released 20.11.2010 at http://yacy.net
*
* $LastChangedDate$
* $LastChangedRevision$
* $LastChangedBy$
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -49,7 +45,10 @@ import javax.imageio.stream.MemoryCacheImageOutputStream;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/*
* for a GIF Image Metadata Format Specification, see:
* http://docs.oracle.com/javase/6/docs/api/javax/imageio/metadata/doc-files/gif_metadata.html
*/
public class AnimationGIF {
private final static String formatName = "javax_imageio_gif_image_1.0";
@ -57,6 +56,8 @@ public class AnimationGIF {
private final static String aeNodeName = "ApplicationExtension";
private final static String gceNodeName = "GraphicControlExtension";
private final static String delayNodeName = "delayTime";
private final static String transparencyFlagNodeName = "transparentColorFlag";
private final static String transparencyIndexNodeName = "transparentColorIndex";
private int counter, loops;
private IIOMetadata iiom;
@ -86,10 +87,11 @@ public class AnimationGIF {
/**
* add an image to the animation
* @param image the image
* @param duration the frame time of the image in milliseconds
* @param delayMillis the frame time of the image in milliseconds
* @param transparencyColorIndex the index of the transparent color, -1 if not used
* @throws IOException
*/
public void addImage(RenderedImage image, int duration) throws IOException {
public void addImage(RenderedImage image, int delayMillis, int transparencyColorIndex) throws IOException {
if (this.counter == 0) {
iiom = writer.getDefaultImageMetadata(ImageTypeSpecifier.createFromRenderedImage(image), iwp);
writer.prepareWriteSequence(writer.getDefaultStreamMetadata(iwp));
@ -97,14 +99,14 @@ public class AnimationGIF {
if (this.counter == 0 && loops >= 0) {
IIOMetadata imageMetadata2 = writer.getDefaultImageMetadata(ImageTypeSpecifier.createFromRenderedImage(image), iwp);
try {
setDelay(imageMetadata2, duration);
setMetadata(imageMetadata2, delayMillis, transparencyColorIndex);
setLoops(imageMetadata2, this.loops);
writer.writeToSequence(new IIOImage(image, null, imageMetadata2), iwp);
} catch (IIOInvalidTreeException e) {
throw new IOException(e.getMessage());
}
} else try {
setDelay(iiom, duration);
setMetadata(iiom, delayMillis, transparencyColorIndex);
writer.writeToSequence(new IIOImage(image, null, iiom), iwp);
} catch (IIOInvalidTreeException e) {
throw new IOException(e.getMessage());
@ -128,7 +130,7 @@ public class AnimationGIF {
return baos.toByteArray();
}
private static void setDelay(IIOMetadata metaData, int delay) throws IIOInvalidTreeException {
private static void setMetadata(IIOMetadata metaData, int delayMillis, int transparencyColorIndex) throws IIOInvalidTreeException {
Node tree = metaData.getAsTree(formatName);
NodeList nodeList = tree.getChildNodes();
Node gceNode = null;
@ -142,7 +144,21 @@ public class AnimationGIF {
delayNode = tree.getOwnerDocument().createAttribute(delayNodeName);
gceNode.appendChild(delayNode);
}
delayNode.setNodeValue(Integer.valueOf(delay / 10).toString());
delayNode.setNodeValue(Integer.valueOf(delayMillis / 10).toString());
if (transparencyColorIndex >= 0) {
Node transparencyFlagNode = gceNode.getAttributes().getNamedItem(transparencyFlagNodeName);
if (transparencyFlagNode == null) {
transparencyFlagNode = tree.getOwnerDocument().createAttribute(transparencyFlagNodeName);
gceNode.appendChild(transparencyFlagNode);
}
transparencyFlagNode.setNodeValue("TRUE");
Node transparencyIndexNode = gceNode.getAttributes().getNamedItem(transparencyIndexNodeName);
if (transparencyIndexNode == null) {
transparencyIndexNode = tree.getOwnerDocument().createAttribute(transparencyIndexNodeName);
gceNode.appendChild(transparencyIndexNode);
}
transparencyIndexNode.setNodeValue(Integer.valueOf(transparencyColorIndex).toString());
}
metaData.setFromTree(formatName, tree);
}
@ -186,7 +202,7 @@ public class AnimationGIF {
AnimationGIF generator = new AnimationGIF(0);
try {
for (int i = 0; i < framescount; i++) {
generator.addImage(generateTestImage(320, 160, r, i * 2 * Math.PI / framescount), 10);
generator.addImage(generateTestImage(320, 160, r, i * 2 * Math.PI / framescount), 10, 0);
}
FileOutputStream fos = new FileOutputStream(new File("/tmp/giftest.gif"));
fos.write(generator.get());

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