patchanim-commit Mailing List for patchanim (Page 8)

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Revision: 130
          http://patchanim.svn.sourceforge.net/patchanim/?rev=130&view=rev
Author:   dbrosius
Date:     2008-02-09 20:33:41 -0800 (Sat, 09 Feb 2008)

Log Message:
-----------
start adding support for apngs

Modified Paths:
--------------
    trunk/patchanim/src/com/mebigfatguy/patchanim/ExportType.java
    trunk/patchanim/src/com/mebigfatguy/patchanim/gui/JPatchAnimFrame.java
    trunk/patchanim/src/com/mebigfatguy/patchanim/io/PatchExporter.java
    trunk/patchanim/src/com/mebigfatguy/patchanim/main/PatchAnimBundle.java
    trunk/patchanim/src/com/mebigfatguy/patchanim/resources.properties

Added Paths:
-----------
    trunk/patchanim/src/com/mebigfatguy/apng/
    trunk/patchanim/src/com/mebigfatguy/apng/APngEncoder.java

Added: trunk/patchanim/src/com/mebigfatguy/apng/APngEncoder.java
===================================================================

--- trunk/patchanim/src/com/mebigfatguy/apng/APngEncoder.java	                        (rev 0)
+++ trunk/patchanim/src/com/mebigfatguy/apng/APngEncoder.java	2008-02-10 04:33:41 UTC (rev 130)
@@ -0,0 +1,268 @@
+/*
+ * patchanim - A bezier surface patch color blend gif builder
+ * Copyright (C) 2008 Dave Brosius
+ * 
+ * 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
+ */
+package com.mebigfatguy.apng;
+
+import java.awt.image.BufferedImage;
+import java.io.BufferedOutputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import javax.imageio.ImageIO;
+
+import com.mebigfatguy.patchanim.ExportType;
+
+/**
+ * generates apng files by simply relying on the built in png encoder of ImageIO
+ * and sewing together multiple chunks from the underlying pngs.
+ */
+public class APngEncoder {
+	private static final byte[] HEADER = new byte[] { -119, 80, 78, 71, 13, 10, 26, 10 };
+	private static final int IHDR = 0x49484452;
+	private static final int IDAT = 0x49444154;
+	private static final int IEND = 0x49454E44;
+	private static final int acTL = 0x6163544C;
+	private static final int fcTL = 0x6663544C;
+	private static final int fdAT = 0x66644154;
+
+	private DataOutputStream out = null;
+	private boolean started = false;
+	private boolean closeStream = false;
+	private boolean headerWritten = false;
+	private boolean repeatInfinite = false;
+	private int delay = 100;
+	private int frameCount = 1;
+	private int seqNum = 0;
+	private boolean processedFirstFrame = false;
+	
+	public void setDelay(int ms) {
+		delay = ms;
+	}
+	
+	public void setRepeat(boolean infinite) {
+		repeatInfinite = infinite;
+	}
+	
+	public void setNumFrames(int frames) {
+		frameCount = frames;
+	}
+	
+	public boolean start(OutputStream os) {
+		if (os == null) 
+			return false;
+		boolean ok = true;
+		closeStream = false;
+		out = new DataOutputStream(os);
+		try {
+			out.write(HEADER);
+		} catch (IOException e) {
+			ok = false;
+		}
+		return started = ok;
+	}
+	
+	public boolean start(String file) {
+		boolean ok = true;
+		try {
+			out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
+			ok = start(out);
+			closeStream = true;
+		} catch (IOException e) {
+			ok = false;
+		}
+		return started = ok;
+	}
+	
+	public boolean finish() {
+		if (!started) 
+			return false;
+		try {
+			if (closeStream)
+				out.close();
+		} catch (IOException ioe) {
+		}
+		
+		return true;
+	}
+	
+	public boolean addFrame(BufferedImage im) {
+		if ((im == null) || !started)
+			return false;
+		try {
+			PngStream pStrm;
+			boolean sawIDAT = false;
+			{
+				ByteArrayOutputStream baos = new ByteArrayOutputStream(im.getHeight() * im.getWidth()); //a conservative estimate
+				ImageIO.write(im, ExportType.Pngs.getExtension(), baos);
+				pStrm = new PngStream(baos.toByteArray());
+				baos.reset();
+			}
+			Chunk chunk = pStrm.readNextChunk(pStrm);
+			while (chunk != null) {
+				switch (chunk.type) {
+					case IHDR:
+						if (!headerWritten) {
+							chunk.write(out);
+							headerWritten = true;
+							Chunk acTLChunk = new Chunk(8, acTL);
+
+							acTLChunk.injectInt(0, frameCount);
+							acTLChunk.injectInt(4, repeatInfinite ? 0 : 1);
+							acTLChunk.calcCRC();
+							acTLChunk.write(out);
+						}
+					break;
+					
+					case IDAT:
+						if (!sawIDAT) {
+							Chunk fcTLChunk = new Chunk(26, fcTL);
+							fcTLChunk.injectInt(0, seqNum);
+							fcTLChunk.injectInt(4, im.getWidth());
+							fcTLChunk.injectInt(8, im.getHeight());
+							fcTLChunk.injectInt(12, 0);
+							fcTLChunk.injectInt(16, 0);
+							fcTLChunk.injectShort(20, delay);
+							fcTLChunk.injectShort(22, 1000);
+							fcTLChunk.injectShort(24, 0);
+							fcTLChunk.calcCRC();
+							fcTLChunk.write(out);
+							sawIDAT = true;
+						}
+						if (!processedFirstFrame) {
+							chunk.write(out);
+						} else {
+							Chunk fdATChunk = new Chunk(chunk.length + 4, fdAT);
+							fdATChunk.injectInt(0, seqNum);
+							System.arraycopy(chunk.data, 0, fdATChunk.data, 4, chunk.length);
+							fdATChunk.calcCRC();
+							fdATChunk.write(out);
+						}
+					break;
+					
+					case IEND:
+						if (seqNum >= frameCount)
+							chunk.write(out);
+					break;
+				}
+				chunk = pStrm.readNextChunk(pStrm);
+			}
+			processedFirstFrame = true;
+			seqNum++;
+
+			return true;
+		} catch (IOException ioe) {
+			return false;
+		} finally {
+			
+		}
+	}
+		
+	static class PngStream {
+		public PngStream(byte[] pngData) {
+			pos = HEADER.length;
+			data = pngData;
+		}
+		
+		public Chunk readNextChunk(PngStream pStrm) {
+			if (pos >= data.length)
+				return null;
+
+			Chunk c = new Chunk(readNextInt(), readNextInt());
+
+			System.arraycopy(data, pos, c.data, 0, c.length);
+			pos += c.length;
+			c.crc = readNextInt();
+			return c;
+		}
+		
+		private int readNextInt() {
+			int val = 0;
+			for (int i = 0; i < 4; i++) {
+				val <<= 8;
+				val |= (0x00FF & data[pos++]);
+			}
+			return val;
+		}
+		
+		public int pos;
+		public byte[] data;
+	}
+	
+	static class Chunk {
+		private static long crcTable[] = new long[256];
+		static {
+			long c;
+		     int n, k;
+		   
+		     for (n = 0; n < 256; n++) {
+		       c = (long) n;
+		       for (k = 0; k < 8; k++) {
+		         if ((c & 1) != 0)
+		           c = 0xedb88320L ^ (c >> 1);
+		         else
+		           c = c >> 1;
+		       }
+		       crcTable[n] = c;
+		     }
+		}
+		
+		public int length;
+		public int type;
+		public byte[] data;
+		public int crc;
+		
+		public Chunk(int len, int chunkType) {
+			length = len;
+			type = chunkType;
+			data = new byte[length];
+			crc = 0;
+		}
+		
+		public void write(DataOutputStream out) throws IOException {
+			out.writeInt(length);
+			out.writeInt(type);
+			out.write(data);
+			out.writeInt(crc);
+		}
+		
+		public void injectInt(int offset, int value) {
+			data[offset++] = (byte)(value >> 24 & 0x00FF);
+			data[offset++] = (byte)(value >> 16 & 0x00FF);
+			data[offset++] = (byte)(value >> 8 & 0x00FF);
+			data[offset]   = (byte)(value & 0x00FF);
+		}
+		
+		public void injectShort(int offset, int value) {
+			data[offset++] = (byte)(value >> 8 & 0x00FF);
+			data[offset]   = (byte)(value & 0x00FF);
+		}
+		
+		public void calcCRC() {
+			long c = -1;
+			for (int n = 0; n < length; n++) {
+				c = crcTable[(int)((c ^ data[n]) & 0x00FF)] ^ (c >> 8);
+			}
+			
+			c &= -1;
+			crc = (int)c;
+		}
+	}
+}


Property changes on: trunk/patchanim/src/com/mebigfatguy/apng/APngEncoder.java
___________________________________________________________________
Name: svn:mime-type
   + text/plain
Name: svn:eol-style
   + native

Modified: trunk/patchanim/src/com/mebigfatguy/patchanim/ExportType.java
===================================================================
--- trunk/patchanim/src/com/mebigfatguy/patchanim/ExportType.java	2008-02-10 01:12:47 UTC (rev 129)
+++ trunk/patchanim/src/com/mebigfatguy/patchanim/ExportType.java	2008-02-10 04:33:41 UTC (rev 130)
@@ -9,6 +9,7 @@
  *  <li><b>Pngs</b> a series of Png files in a directory</li>
  *  <li><b>Gifs</b> a series of Gif files in a directory</li>
  *  <li><b>AnimatedGif</b> an animated gif file</li>
+ *  <li><b>AnimatedPng</b> an animated png file</li>
  *  <li><b>Mpeg</b> an animated mpeg file</li>
  * </ul>
  */
@@ -17,6 +18,7 @@
 	Pngs("png", true, PatchAnimBundle.PNGSERIESFILTER),
 	Gifs("gif", true, PatchAnimBundle.GIFSERIESFILTER),
 	AnimatedGif("gif", false, PatchAnimBundle.ANIMATEDGIFFILTER),
+	AnimatedPng("png", false, PatchAnimBundle.ANIMATEDPNGFILTER),
 	MPeg("mpeg", false, PatchAnimBundle.MPEGFILTER);
 		
 	private String ext;

Modified: trunk/patchanim/src/com/mebigfatguy/patchanim/gui/JPatchAnimFrame.java
===================================================================
--- trunk/patchanim/src/com/mebigfatguy/patchanim/gui/JPatchAnimFrame.java	2008-02-10 01:12:47 UTC (rev 129)
+++ trunk/patchanim/src/com/mebigfatguy/patchanim/gui/JPatchAnimFrame.java	2008-02-10 04:33:41 UTC (rev 130)
@@ -60,6 +60,7 @@
 	private JMenuItem exportPngsItem;
 	private JMenuItem exportGifsItem;
 	private JMenuItem exportAnimatedGifItem;
+	private JMenuItem exportAnimatedPngItem;
 	private JMenuItem quitItem;
 	private PatchAnimDocument document;
 	private File documentLocation;
@@ -106,11 +107,13 @@
 		exportPngsItem = new JMenuItem(rb.getString(PatchAnimBundle.PNGSERIES));
 		exportGifsItem = new JMenuItem(rb.getString(PatchAnimBundle.GIFSERIES));
 		exportAnimatedGifItem = new JMenuItem(rb.getString(PatchAnimBundle.ANIMATEDGIF));
+		exportAnimatedPngItem = new JMenuItem(rb.getString(PatchAnimBundle.ANIMATEDPNG));
 		exportMenu.add(exportJpgsItem);
 		exportMenu.add(exportPngsItem);
 		exportMenu.add(exportGifsItem);
 		exportMenu.addSeparator();
 		exportMenu.add(exportAnimatedGifItem);
+		exportMenu.add(exportAnimatedPngItem);
 		fileMenu.add(exportMenu);
 		fileMenu.addSeparator();
 		quitItem = new JMenuItem(rb.getString(PatchAnimBundle.QUIT));
@@ -236,6 +239,12 @@
 			}
 		});
 		
+		exportAnimatedPngItem.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent ae) {
+				export(ExportType.AnimatedPng);
+			}
+		});
+		
 		quitItem.addActionListener(new ActionListener() {
 			public void actionPerformed(ActionEvent ae) {
 				try {

Modified: trunk/patchanim/src/com/mebigfatguy/patchanim/io/PatchExporter.java
===================================================================
--- trunk/patchanim/src/com/mebigfatguy/patchanim/io/PatchExporter.java	2008-02-10 01:12:47 UTC (rev 129)
+++ trunk/patchanim/src/com/mebigfatguy/patchanim/io/PatchExporter.java	2008-02-10 04:33:41 UTC (rev 130)
@@ -29,6 +29,7 @@
 import javax.imageio.ImageIO;
 
 import com.fmsware.gif.AnimatedGifEncoder;
+import com.mebigfatguy.apng.APngEncoder;
 import com.mebigfatguy.patchanim.AnimationType;
 import com.mebigfatguy.patchanim.ExportType;
 import com.mebigfatguy.patchanim.OutOfBoundsColor;
@@ -42,6 +43,7 @@
 	private ExportType type;
 	private File loc;
 	private AnimatedGifEncoder agEncoder;
+	private APngEncoder apngEncoder;
 	private int totalImages;
 	private Set<ExportListener> elisteners = new HashSet<ExportListener>();
 	
@@ -50,6 +52,8 @@
 		loc = location;
 		if (type == ExportType.AnimatedGif)
 			agEncoder = new AnimatedGifEncoder();
+		else if (type == ExportType.AnimatedPng)
+			apngEncoder = new APngEncoder();
 		else
 			agEncoder = null;
 	}
@@ -70,6 +74,8 @@
 					baseName = baseName + dotExt;
 				if (type == ExportType.AnimatedGif)
 					agEncoder.start(new File(loc, baseName).getPath());
+				else if (type == ExportType.AnimatedPng)
+					apngEncoder.start(new File(loc, baseName).getPath());
 			}
 	
 			totalImages = calcImageCount(document);
@@ -84,6 +90,9 @@
 			
 			if (type == ExportType.AnimatedGif) {
 				agEncoder.setRepeat((atype != AnimationType.None) ? 0 : -1);
+			} else if (type == ExportType.AnimatedPng) {
+				apngEncoder.setRepeat(atype != AnimationType.None);
+				apngEncoder.setNumFrames(totalImages);
 			}
 			
 			if (lastPatch == 0) {
@@ -118,6 +127,8 @@
 		} finally {
 			if (type == ExportType.AnimatedGif) {
 				agEncoder.finish();
+			} else if (type == ExportType.AnimatedPng) {
+				apngEncoder.finish();
 			}
 		}
 	}
@@ -137,6 +148,9 @@
 		} else if (type == ExportType.AnimatedGif) {
 			agEncoder.addFrame(image);
 			agEncoder.setDelay(100);
+		} else if (type == ExportType.AnimatedPng) {
+			apngEncoder.setDelay(100);
+			apngEncoder.addFrame(image);
 		}
 		else
 			ImageIO.write(image, type.getExtension(), imageFile);

Modified: trunk/patchanim/src/com/mebigfatguy/patchanim/main/PatchAnimBundle.java
===================================================================
--- trunk/patchanim/src/com/mebigfatguy/patchanim/main/PatchAnimBundle.java	2008-02-10 01:12:47 UTC (rev 129)
+++ trunk/patchanim/src/com/mebigfatguy/patchanim/main/PatchAnimBundle.java	2008-02-10 04:33:41 UTC (rev 130)
@@ -38,6 +38,8 @@
 	public static final String GIFSERIESFILTER = "patchanim.filter.gifs";
 	public static final String ANIMATEDGIF = "patchanim.animatedgif";
 	public static final String ANIMATEDGIFFILTER = "patchanim.filter.animatedgif";
+	public static final String ANIMATEDPNG = "patchanim.apng";
+	public static final String ANIMATEDPNGFILTER = "patchanim.filter.apng";
 	public static final String MPEG = "patchanim.mpeg";
 	public static final String MPEGFILTER = "patchanim.filter.mpeg";
 	public static final String EXPORTINGFILE = "patchanim.exportfile";

Modified: trunk/patchanim/src/com/mebigfatguy/patchanim/resources.properties
===================================================================
--- trunk/patchanim/src/com/mebigfatguy/patchanim/resources.properties	2008-02-10 01:12:47 UTC (rev 129)
+++ trunk/patchanim/src/com/mebigfatguy/patchanim/resources.properties	2008-02-10 04:33:41 UTC (rev 130)
@@ -31,6 +31,8 @@
 patchanim.filter.gifs = Gif Files (*.gif)
 patchanim.animatedgif = an Animated Gif
 patchanim.filter.animatedgif = Gif Files (*.gif)
+patchanim.apng = an Animated Png
+patchanim.filter.apng = (Png Files (*.png)
 patchanim.mpeg = an MPEG
 patchanim.filter.mpeg = MPEG Files (*.mpg)
 patchanim.exportfile = Exporting Animation


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patchanim-commit Mailing List for patchanim (Page 8)

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