author | jdv |
Wed, 02 Dec 2015 00:47:36 +0530 | |
changeset 34792 | 9421752d717b |
parent 25859 | 3317bb8137f4 |
child 35646 | 845a3ebfeb00 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
5506 | 2 |
* Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. |
2 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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5506 | 7 |
* published by the Free Software Foundation. Oracle designates this |
2 | 8 |
* particular file as subject to the "Classpath" exception as provided |
5506 | 9 |
* by Oracle in the LICENSE file that accompanied this code. |
2 | 10 |
* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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5506 | 21 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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2 | 24 |
*/ |
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package com.sun.imageio.plugins.png; |
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28 |
import java.awt.Rectangle; |
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29 |
import java.awt.image.ColorModel; |
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30 |
import java.awt.image.IndexColorModel; |
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31 |
import java.awt.image.Raster; |
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import java.awt.image.WritableRaster; |
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import java.awt.image.RenderedImage; |
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import java.awt.image.SampleModel; |
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import java.io.ByteArrayOutputStream; |
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import java.io.DataOutput; |
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import java.io.IOException; |
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import java.io.OutputStream; |
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39 |
import java.util.Iterator; |
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import java.util.Locale; |
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41 |
import java.util.zip.Deflater; |
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42 |
import java.util.zip.DeflaterOutputStream; |
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import javax.imageio.IIOException; |
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44 |
import javax.imageio.IIOImage; |
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import javax.imageio.ImageTypeSpecifier; |
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import javax.imageio.ImageWriteParam; |
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import javax.imageio.ImageWriter; |
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48 |
import javax.imageio.metadata.IIOMetadata; |
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49 |
import javax.imageio.metadata.IIOMetadata; |
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import javax.imageio.spi.ImageWriterSpi; |
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import javax.imageio.stream.ImageOutputStream; |
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import javax.imageio.stream.ImageOutputStreamImpl; |
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54 |
class CRC { |
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55 |
||
56 |
private static int[] crcTable = new int[256]; |
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57 |
private int crc = 0xffffffff; |
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58 |
||
59 |
static { |
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60 |
// Initialize CRC table |
|
61 |
for (int n = 0; n < 256; n++) { |
|
62 |
int c = n; |
|
63 |
for (int k = 0; k < 8; k++) { |
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64 |
if ((c & 1) == 1) { |
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65 |
c = 0xedb88320 ^ (c >>> 1); |
|
66 |
} else { |
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67 |
c >>>= 1; |
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68 |
} |
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69 |
||
70 |
crcTable[n] = c; |
|
71 |
} |
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72 |
} |
|
73 |
} |
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74 |
||
75 |
public CRC() {} |
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76 |
||
77 |
public void reset() { |
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78 |
crc = 0xffffffff; |
|
79 |
} |
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80 |
||
81 |
public void update(byte[] data, int off, int len) { |
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82 |
for (int n = 0; n < len; n++) { |
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83 |
crc = crcTable[(crc ^ data[off + n]) & 0xff] ^ (crc >>> 8); |
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84 |
} |
|
85 |
} |
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86 |
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87 |
public void update(int data) { |
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88 |
crc = crcTable[(crc ^ data) & 0xff] ^ (crc >>> 8); |
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89 |
} |
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90 |
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91 |
public int getValue() { |
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return crc ^ 0xffffffff; |
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93 |
} |
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} |
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95 |
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96 |
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97 |
final class ChunkStream extends ImageOutputStreamImpl { |
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private ImageOutputStream stream; |
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private long startPos; |
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private CRC crc = new CRC(); |
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102 |
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103 |
public ChunkStream(int type, ImageOutputStream stream) throws IOException { |
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this.stream = stream; |
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this.startPos = stream.getStreamPosition(); |
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107 |
stream.writeInt(-1); // length, will backpatch |
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writeInt(type); |
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} |
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111 |
public int read() throws IOException { |
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throw new RuntimeException("Method not available"); |
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} |
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115 |
public int read(byte[] b, int off, int len) throws IOException { |
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throw new RuntimeException("Method not available"); |
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} |
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119 |
public void write(byte[] b, int off, int len) throws IOException { |
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120 |
crc.update(b, off, len); |
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stream.write(b, off, len); |
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} |
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124 |
public void write(int b) throws IOException { |
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crc.update(b); |
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stream.write(b); |
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} |
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public void finish() throws IOException { |
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// Write CRC |
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stream.writeInt(crc.getValue()); |
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133 |
// Write length |
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long pos = stream.getStreamPosition(); |
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stream.seek(startPos); |
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stream.writeInt((int)(pos - startPos) - 12); |
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// Return to end of chunk and flush to minimize buffering |
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stream.seek(pos); |
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stream.flushBefore(pos); |
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} |
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protected void finalize() throws Throwable { |
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// Empty finalizer (for improved performance; no need to call |
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// super.finalize() in this case) |
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146 |
} |
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} |
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149 |
// Compress output and write as a series of 'IDAT' chunks of |
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// fixed length. |
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final class IDATOutputStream extends ImageOutputStreamImpl { |
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153 |
private static byte[] chunkType = { |
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(byte)'I', (byte)'D', (byte)'A', (byte)'T' |
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}; |
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156 |
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157 |
private ImageOutputStream stream; |
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private int chunkLength; |
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private long startPos; |
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private CRC crc = new CRC(); |
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162 |
Deflater def = new Deflater(Deflater.BEST_COMPRESSION); |
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byte[] buf = new byte[512]; |
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private int bytesRemaining; |
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167 |
public IDATOutputStream(ImageOutputStream stream, int chunkLength) |
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168 |
throws IOException { |
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this.stream = stream; |
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this.chunkLength = chunkLength; |
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startChunk(); |
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} |
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174 |
private void startChunk() throws IOException { |
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175 |
crc.reset(); |
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176 |
this.startPos = stream.getStreamPosition(); |
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177 |
stream.writeInt(-1); // length, will backpatch |
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179 |
crc.update(chunkType, 0, 4); |
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stream.write(chunkType, 0, 4); |
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this.bytesRemaining = chunkLength; |
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} |
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185 |
private void finishChunk() throws IOException { |
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186 |
// Write CRC |
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187 |
stream.writeInt(crc.getValue()); |
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188 |
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189 |
// Write length |
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long pos = stream.getStreamPosition(); |
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stream.seek(startPos); |
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192 |
stream.writeInt((int)(pos - startPos) - 12); |
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194 |
// Return to end of chunk and flush to minimize buffering |
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stream.seek(pos); |
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try { |
197 |
stream.flushBefore(pos); |
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} catch (IOException e) { |
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199 |
/* |
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200 |
* If flushBefore() fails we try to access startPos in finally |
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* block of write_IDAT(). We should update startPos to avoid |
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202 |
* IndexOutOfBoundException while seek() is happening. |
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203 |
*/ |
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204 |
this.startPos = stream.getStreamPosition(); |
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throw e; |
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206 |
} |
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} |
208 |
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209 |
public int read() throws IOException { |
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210 |
throw new RuntimeException("Method not available"); |
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211 |
} |
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212 |
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213 |
public int read(byte[] b, int off, int len) throws IOException { |
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throw new RuntimeException("Method not available"); |
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215 |
} |
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217 |
public void write(byte[] b, int off, int len) throws IOException { |
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218 |
if (len == 0) { |
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return; |
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} |
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222 |
if (!def.finished()) { |
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223 |
def.setInput(b, off, len); |
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while (!def.needsInput()) { |
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deflate(); |
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} |
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} |
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} |
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230 |
public void deflate() throws IOException { |
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231 |
int len = def.deflate(buf, 0, buf.length); |
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int off = 0; |
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234 |
while (len > 0) { |
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235 |
if (bytesRemaining == 0) { |
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236 |
finishChunk(); |
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237 |
startChunk(); |
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238 |
} |
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240 |
int nbytes = Math.min(len, bytesRemaining); |
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241 |
crc.update(buf, off, nbytes); |
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242 |
stream.write(buf, off, nbytes); |
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244 |
off += nbytes; |
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len -= nbytes; |
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246 |
bytesRemaining -= nbytes; |
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247 |
} |
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248 |
} |
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249 |
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250 |
public void write(int b) throws IOException { |
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251 |
byte[] wbuf = new byte[1]; |
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wbuf[0] = (byte)b; |
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253 |
write(wbuf, 0, 1); |
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254 |
} |
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255 |
||
256 |
public void finish() throws IOException { |
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349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
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try { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
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258 |
if (!def.finished()) { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
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def.finish(); |
349c53487e78
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260 |
while (!def.finished()) { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
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261 |
deflate(); |
349c53487e78
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262 |
} |
2 | 263 |
} |
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349c53487e78
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264 |
finishChunk(); |
349c53487e78
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265 |
} finally { |
349c53487e78
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266 |
def.end(); |
2 | 267 |
} |
268 |
} |
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||
270 |
protected void finalize() throws Throwable { |
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271 |
// Empty finalizer (for improved performance; no need to call |
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272 |
// super.finalize() in this case) |
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273 |
} |
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274 |
} |
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275 |
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276 |
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277 |
class PNGImageWriteParam extends ImageWriteParam { |
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278 |
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279 |
public PNGImageWriteParam(Locale locale) { |
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280 |
super(); |
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281 |
this.canWriteProgressive = true; |
|
282 |
this.locale = locale; |
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283 |
} |
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284 |
} |
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285 |
||
286 |
/** |
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287 |
*/ |
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288 |
public class PNGImageWriter extends ImageWriter { |
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289 |
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290 |
ImageOutputStream stream = null; |
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291 |
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292 |
PNGMetadata metadata = null; |
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293 |
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294 |
// Factors from the ImageWriteParam |
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295 |
int sourceXOffset = 0; |
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296 |
int sourceYOffset = 0; |
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297 |
int sourceWidth = 0; |
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298 |
int sourceHeight = 0; |
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299 |
int[] sourceBands = null; |
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300 |
int periodX = 1; |
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int periodY = 1; |
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302 |
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303 |
int numBands; |
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304 |
int bpp; |
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305 |
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306 |
RowFilter rowFilter = new RowFilter(); |
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307 |
byte[] prevRow = null; |
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308 |
byte[] currRow = null; |
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309 |
byte[][] filteredRows = null; |
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310 |
||
311 |
// Per-band scaling tables |
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312 |
// |
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313 |
// After the first call to initializeScaleTables, either scale and scale0 |
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314 |
// will be valid, or scaleh and scalel will be valid, but not both. |
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315 |
// |
|
316 |
// The tables will be designed for use with a set of input but depths |
|
317 |
// given by sampleSize, and an output bit depth given by scalingBitDepth. |
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318 |
// |
|
319 |
int[] sampleSize = null; // Sample size per band, in bits |
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320 |
int scalingBitDepth = -1; // Output bit depth of the scaling tables |
|
321 |
||
322 |
// Tables for 1, 2, 4, or 8 bit output |
|
323 |
byte[][] scale = null; // 8 bit table |
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324 |
byte[] scale0 = null; // equivalent to scale[0] |
|
325 |
||
326 |
// Tables for 16 bit output |
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327 |
byte[][] scaleh = null; // High bytes of output |
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328 |
byte[][] scalel = null; // Low bytes of output |
|
329 |
||
330 |
int totalPixels; // Total number of pixels to be written by write_IDAT |
|
331 |
int pixelsDone; // Running count of pixels written by write_IDAT |
|
332 |
||
333 |
public PNGImageWriter(ImageWriterSpi originatingProvider) { |
|
334 |
super(originatingProvider); |
|
335 |
} |
|
336 |
||
337 |
public void setOutput(Object output) { |
|
338 |
super.setOutput(output); |
|
339 |
if (output != null) { |
|
340 |
if (!(output instanceof ImageOutputStream)) { |
|
341 |
throw new IllegalArgumentException("output not an ImageOutputStream!"); |
|
342 |
} |
|
343 |
this.stream = (ImageOutputStream)output; |
|
344 |
} else { |
|
345 |
this.stream = null; |
|
346 |
} |
|
347 |
} |
|
348 |
||
349 |
private static int[] allowedProgressivePasses = { 1, 7 }; |
|
350 |
||
351 |
public ImageWriteParam getDefaultWriteParam() { |
|
352 |
return new PNGImageWriteParam(getLocale()); |
|
353 |
} |
|
354 |
||
355 |
public IIOMetadata getDefaultStreamMetadata(ImageWriteParam param) { |
|
356 |
return null; |
|
357 |
} |
|
358 |
||
359 |
public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType, |
|
360 |
ImageWriteParam param) { |
|
361 |
PNGMetadata m = new PNGMetadata(); |
|
362 |
m.initialize(imageType, imageType.getSampleModel().getNumBands()); |
|
363 |
return m; |
|
364 |
} |
|
365 |
||
366 |
public IIOMetadata convertStreamMetadata(IIOMetadata inData, |
|
367 |
ImageWriteParam param) { |
|
368 |
return null; |
|
369 |
} |
|
370 |
||
371 |
public IIOMetadata convertImageMetadata(IIOMetadata inData, |
|
372 |
ImageTypeSpecifier imageType, |
|
373 |
ImageWriteParam param) { |
|
374 |
// TODO - deal with imageType |
|
375 |
if (inData instanceof PNGMetadata) { |
|
376 |
return (PNGMetadata)((PNGMetadata)inData).clone(); |
|
377 |
} else { |
|
378 |
return new PNGMetadata(inData); |
|
379 |
} |
|
380 |
} |
|
381 |
||
382 |
private void write_magic() throws IOException { |
|
383 |
// Write signature |
|
384 |
byte[] magic = { (byte)137, 80, 78, 71, 13, 10, 26, 10 }; |
|
385 |
stream.write(magic); |
|
386 |
} |
|
387 |
||
388 |
private void write_IHDR() throws IOException { |
|
389 |
// Write IHDR chunk |
|
390 |
ChunkStream cs = new ChunkStream(PNGImageReader.IHDR_TYPE, stream); |
|
391 |
cs.writeInt(metadata.IHDR_width); |
|
392 |
cs.writeInt(metadata.IHDR_height); |
|
393 |
cs.writeByte(metadata.IHDR_bitDepth); |
|
394 |
cs.writeByte(metadata.IHDR_colorType); |
|
395 |
if (metadata.IHDR_compressionMethod != 0) { |
|
396 |
throw new IIOException( |
|
397 |
"Only compression method 0 is defined in PNG 1.1"); |
|
398 |
} |
|
399 |
cs.writeByte(metadata.IHDR_compressionMethod); |
|
400 |
if (metadata.IHDR_filterMethod != 0) { |
|
401 |
throw new IIOException( |
|
402 |
"Only filter method 0 is defined in PNG 1.1"); |
|
403 |
} |
|
404 |
cs.writeByte(metadata.IHDR_filterMethod); |
|
405 |
if (metadata.IHDR_interlaceMethod < 0 || |
|
406 |
metadata.IHDR_interlaceMethod > 1) { |
|
407 |
throw new IIOException( |
|
408 |
"Only interlace methods 0 (node) and 1 (adam7) are defined in PNG 1.1"); |
|
409 |
} |
|
410 |
cs.writeByte(metadata.IHDR_interlaceMethod); |
|
411 |
cs.finish(); |
|
412 |
} |
|
413 |
||
414 |
private void write_cHRM() throws IOException { |
|
415 |
if (metadata.cHRM_present) { |
|
416 |
ChunkStream cs = new ChunkStream(PNGImageReader.cHRM_TYPE, stream); |
|
417 |
cs.writeInt(metadata.cHRM_whitePointX); |
|
418 |
cs.writeInt(metadata.cHRM_whitePointY); |
|
419 |
cs.writeInt(metadata.cHRM_redX); |
|
420 |
cs.writeInt(metadata.cHRM_redY); |
|
421 |
cs.writeInt(metadata.cHRM_greenX); |
|
422 |
cs.writeInt(metadata.cHRM_greenY); |
|
423 |
cs.writeInt(metadata.cHRM_blueX); |
|
424 |
cs.writeInt(metadata.cHRM_blueY); |
|
425 |
cs.finish(); |
|
426 |
} |
|
427 |
} |
|
428 |
||
429 |
private void write_gAMA() throws IOException { |
|
430 |
if (metadata.gAMA_present) { |
|
431 |
ChunkStream cs = new ChunkStream(PNGImageReader.gAMA_TYPE, stream); |
|
432 |
cs.writeInt(metadata.gAMA_gamma); |
|
433 |
cs.finish(); |
|
434 |
} |
|
435 |
} |
|
436 |
||
437 |
private void write_iCCP() throws IOException { |
|
438 |
if (metadata.iCCP_present) { |
|
439 |
ChunkStream cs = new ChunkStream(PNGImageReader.iCCP_TYPE, stream); |
|
440 |
cs.writeBytes(metadata.iCCP_profileName); |
|
441 |
cs.writeByte(0); // null terminator |
|
442 |
||
443 |
cs.writeByte(metadata.iCCP_compressionMethod); |
|
444 |
cs.write(metadata.iCCP_compressedProfile); |
|
445 |
cs.finish(); |
|
446 |
} |
|
447 |
} |
|
448 |
||
449 |
private void write_sBIT() throws IOException { |
|
450 |
if (metadata.sBIT_present) { |
|
451 |
ChunkStream cs = new ChunkStream(PNGImageReader.sBIT_TYPE, stream); |
|
452 |
int colorType = metadata.IHDR_colorType; |
|
453 |
if (metadata.sBIT_colorType != colorType) { |
|
454 |
processWarningOccurred(0, |
|
455 |
"sBIT metadata has wrong color type.\n" + |
|
456 |
"The chunk will not be written."); |
|
457 |
return; |
|
458 |
} |
|
459 |
||
460 |
if (colorType == PNGImageReader.PNG_COLOR_GRAY || |
|
461 |
colorType == PNGImageReader.PNG_COLOR_GRAY_ALPHA) { |
|
462 |
cs.writeByte(metadata.sBIT_grayBits); |
|
463 |
} else if (colorType == PNGImageReader.PNG_COLOR_RGB || |
|
464 |
colorType == PNGImageReader.PNG_COLOR_PALETTE || |
|
465 |
colorType == PNGImageReader.PNG_COLOR_RGB_ALPHA) { |
|
466 |
cs.writeByte(metadata.sBIT_redBits); |
|
467 |
cs.writeByte(metadata.sBIT_greenBits); |
|
468 |
cs.writeByte(metadata.sBIT_blueBits); |
|
469 |
} |
|
470 |
||
471 |
if (colorType == PNGImageReader.PNG_COLOR_GRAY_ALPHA || |
|
472 |
colorType == PNGImageReader.PNG_COLOR_RGB_ALPHA) { |
|
473 |
cs.writeByte(metadata.sBIT_alphaBits); |
|
474 |
} |
|
475 |
cs.finish(); |
|
476 |
} |
|
477 |
} |
|
478 |
||
479 |
private void write_sRGB() throws IOException { |
|
480 |
if (metadata.sRGB_present) { |
|
481 |
ChunkStream cs = new ChunkStream(PNGImageReader.sRGB_TYPE, stream); |
|
482 |
cs.writeByte(metadata.sRGB_renderingIntent); |
|
483 |
cs.finish(); |
|
484 |
} |
|
485 |
} |
|
486 |
||
487 |
private void write_PLTE() throws IOException { |
|
488 |
if (metadata.PLTE_present) { |
|
489 |
if (metadata.IHDR_colorType == PNGImageReader.PNG_COLOR_GRAY || |
|
490 |
metadata.IHDR_colorType == PNGImageReader.PNG_COLOR_GRAY_ALPHA) { |
|
491 |
// PLTE cannot occur in a gray image |
|
492 |
||
493 |
processWarningOccurred(0, |
|
494 |
"A PLTE chunk may not appear in a gray or gray alpha image.\n" + |
|
495 |
"The chunk will not be written"); |
|
496 |
return; |
|
497 |
} |
|
498 |
||
499 |
ChunkStream cs = new ChunkStream(PNGImageReader.PLTE_TYPE, stream); |
|
500 |
||
501 |
int numEntries = metadata.PLTE_red.length; |
|
502 |
byte[] palette = new byte[numEntries*3]; |
|
503 |
int index = 0; |
|
504 |
for (int i = 0; i < numEntries; i++) { |
|
505 |
palette[index++] = metadata.PLTE_red[i]; |
|
506 |
palette[index++] = metadata.PLTE_green[i]; |
|
507 |
palette[index++] = metadata.PLTE_blue[i]; |
|
508 |
} |
|
509 |
||
510 |
cs.write(palette); |
|
511 |
cs.finish(); |
|
512 |
} |
|
513 |
} |
|
514 |
||
515 |
private void write_hIST() throws IOException, IIOException { |
|
516 |
if (metadata.hIST_present) { |
|
517 |
ChunkStream cs = new ChunkStream(PNGImageReader.hIST_TYPE, stream); |
|
518 |
||
519 |
if (!metadata.PLTE_present) { |
|
520 |
throw new IIOException("hIST chunk without PLTE chunk!"); |
|
521 |
} |
|
522 |
||
523 |
cs.writeChars(metadata.hIST_histogram, |
|
524 |
0, metadata.hIST_histogram.length); |
|
525 |
cs.finish(); |
|
526 |
} |
|
527 |
} |
|
528 |
||
529 |
private void write_tRNS() throws IOException, IIOException { |
|
530 |
if (metadata.tRNS_present) { |
|
531 |
ChunkStream cs = new ChunkStream(PNGImageReader.tRNS_TYPE, stream); |
|
532 |
int colorType = metadata.IHDR_colorType; |
|
533 |
int chunkType = metadata.tRNS_colorType; |
|
534 |
||
535 |
// Special case: image is RGB and chunk is Gray |
|
536 |
// Promote chunk contents to RGB |
|
537 |
int chunkRed = metadata.tRNS_red; |
|
538 |
int chunkGreen = metadata.tRNS_green; |
|
539 |
int chunkBlue = metadata.tRNS_blue; |
|
540 |
if (colorType == PNGImageReader.PNG_COLOR_RGB && |
|
541 |
chunkType == PNGImageReader.PNG_COLOR_GRAY) { |
|
542 |
chunkType = colorType; |
|
543 |
chunkRed = chunkGreen = chunkBlue = |
|
544 |
metadata.tRNS_gray; |
|
545 |
} |
|
546 |
||
547 |
if (chunkType != colorType) { |
|
548 |
processWarningOccurred(0, |
|
549 |
"tRNS metadata has incompatible color type.\n" + |
|
550 |
"The chunk will not be written."); |
|
551 |
return; |
|
552 |
} |
|
553 |
||
554 |
if (colorType == PNGImageReader.PNG_COLOR_PALETTE) { |
|
555 |
if (!metadata.PLTE_present) { |
|
556 |
throw new IIOException("tRNS chunk without PLTE chunk!"); |
|
557 |
} |
|
558 |
cs.write(metadata.tRNS_alpha); |
|
559 |
} else if (colorType == PNGImageReader.PNG_COLOR_GRAY) { |
|
560 |
cs.writeShort(metadata.tRNS_gray); |
|
561 |
} else if (colorType == PNGImageReader.PNG_COLOR_RGB) { |
|
562 |
cs.writeShort(chunkRed); |
|
563 |
cs.writeShort(chunkGreen); |
|
564 |
cs.writeShort(chunkBlue); |
|
565 |
} else { |
|
566 |
throw new IIOException("tRNS chunk for color type 4 or 6!"); |
|
567 |
} |
|
568 |
cs.finish(); |
|
569 |
} |
|
570 |
} |
|
571 |
||
572 |
private void write_bKGD() throws IOException { |
|
573 |
if (metadata.bKGD_present) { |
|
574 |
ChunkStream cs = new ChunkStream(PNGImageReader.bKGD_TYPE, stream); |
|
575 |
int colorType = metadata.IHDR_colorType & 0x3; |
|
576 |
int chunkType = metadata.bKGD_colorType; |
|
577 |
||
578 |
// Special case: image is RGB(A) and chunk is Gray |
|
579 |
// Promote chunk contents to RGB |
|
580 |
int chunkRed = metadata.bKGD_red; |
|
581 |
int chunkGreen = metadata.bKGD_red; |
|
582 |
int chunkBlue = metadata.bKGD_red; |
|
583 |
if (colorType == PNGImageReader.PNG_COLOR_RGB && |
|
584 |
chunkType == PNGImageReader.PNG_COLOR_GRAY) { |
|
585 |
// Make a gray bKGD chunk look like RGB |
|
586 |
chunkType = colorType; |
|
587 |
chunkRed = chunkGreen = chunkBlue = |
|
588 |
metadata.bKGD_gray; |
|
589 |
} |
|
590 |
||
591 |
// Ignore status of alpha in colorType |
|
592 |
if (chunkType != colorType) { |
|
593 |
processWarningOccurred(0, |
|
594 |
"bKGD metadata has incompatible color type.\n" + |
|
595 |
"The chunk will not be written."); |
|
596 |
return; |
|
597 |
} |
|
598 |
||
599 |
if (colorType == PNGImageReader.PNG_COLOR_PALETTE) { |
|
600 |
cs.writeByte(metadata.bKGD_index); |
|
601 |
} else if (colorType == PNGImageReader.PNG_COLOR_GRAY || |
|
602 |
colorType == PNGImageReader.PNG_COLOR_GRAY_ALPHA) { |
|
603 |
cs.writeShort(metadata.bKGD_gray); |
|
604 |
} else { // colorType == PNGImageReader.PNG_COLOR_RGB || |
|
605 |
// colorType == PNGImageReader.PNG_COLOR_RGB_ALPHA |
|
606 |
cs.writeShort(chunkRed); |
|
607 |
cs.writeShort(chunkGreen); |
|
608 |
cs.writeShort(chunkBlue); |
|
609 |
} |
|
610 |
cs.finish(); |
|
611 |
} |
|
612 |
} |
|
613 |
||
614 |
private void write_pHYs() throws IOException { |
|
615 |
if (metadata.pHYs_present) { |
|
616 |
ChunkStream cs = new ChunkStream(PNGImageReader.pHYs_TYPE, stream); |
|
617 |
cs.writeInt(metadata.pHYs_pixelsPerUnitXAxis); |
|
618 |
cs.writeInt(metadata.pHYs_pixelsPerUnitYAxis); |
|
619 |
cs.writeByte(metadata.pHYs_unitSpecifier); |
|
620 |
cs.finish(); |
|
621 |
} |
|
622 |
} |
|
623 |
||
624 |
private void write_sPLT() throws IOException { |
|
625 |
if (metadata.sPLT_present) { |
|
626 |
ChunkStream cs = new ChunkStream(PNGImageReader.sPLT_TYPE, stream); |
|
627 |
||
628 |
cs.writeBytes(metadata.sPLT_paletteName); |
|
629 |
cs.writeByte(0); // null terminator |
|
630 |
||
631 |
cs.writeByte(metadata.sPLT_sampleDepth); |
|
632 |
int numEntries = metadata.sPLT_red.length; |
|
633 |
||
634 |
if (metadata.sPLT_sampleDepth == 8) { |
|
635 |
for (int i = 0; i < numEntries; i++) { |
|
636 |
cs.writeByte(metadata.sPLT_red[i]); |
|
637 |
cs.writeByte(metadata.sPLT_green[i]); |
|
638 |
cs.writeByte(metadata.sPLT_blue[i]); |
|
639 |
cs.writeByte(metadata.sPLT_alpha[i]); |
|
640 |
cs.writeShort(metadata.sPLT_frequency[i]); |
|
641 |
} |
|
642 |
} else { // sampleDepth == 16 |
|
643 |
for (int i = 0; i < numEntries; i++) { |
|
644 |
cs.writeShort(metadata.sPLT_red[i]); |
|
645 |
cs.writeShort(metadata.sPLT_green[i]); |
|
646 |
cs.writeShort(metadata.sPLT_blue[i]); |
|
647 |
cs.writeShort(metadata.sPLT_alpha[i]); |
|
648 |
cs.writeShort(metadata.sPLT_frequency[i]); |
|
649 |
} |
|
650 |
} |
|
651 |
cs.finish(); |
|
652 |
} |
|
653 |
} |
|
654 |
||
655 |
private void write_tIME() throws IOException { |
|
656 |
if (metadata.tIME_present) { |
|
657 |
ChunkStream cs = new ChunkStream(PNGImageReader.tIME_TYPE, stream); |
|
658 |
cs.writeShort(metadata.tIME_year); |
|
659 |
cs.writeByte(metadata.tIME_month); |
|
660 |
cs.writeByte(metadata.tIME_day); |
|
661 |
cs.writeByte(metadata.tIME_hour); |
|
662 |
cs.writeByte(metadata.tIME_minute); |
|
663 |
cs.writeByte(metadata.tIME_second); |
|
664 |
cs.finish(); |
|
665 |
} |
|
666 |
} |
|
667 |
||
668 |
private void write_tEXt() throws IOException { |
|
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
669 |
Iterator<String> keywordIter = metadata.tEXt_keyword.iterator(); |
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
670 |
Iterator<String> textIter = metadata.tEXt_text.iterator(); |
2 | 671 |
|
672 |
while (keywordIter.hasNext()) { |
|
673 |
ChunkStream cs = new ChunkStream(PNGImageReader.tEXt_TYPE, stream); |
|
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
674 |
String keyword = keywordIter.next(); |
2 | 675 |
cs.writeBytes(keyword); |
676 |
cs.writeByte(0); |
|
677 |
||
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
678 |
String text = textIter.next(); |
2 | 679 |
cs.writeBytes(text); |
680 |
cs.finish(); |
|
681 |
} |
|
682 |
} |
|
683 |
||
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
684 |
private byte[] deflate(byte[] b) throws IOException { |
2 | 685 |
ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
686 |
DeflaterOutputStream dos = new DeflaterOutputStream(baos); |
|
2376
63e13f6d2319
6782079: PNG: reading metadata may cause OOM on truncated images.
bae
parents:
1734
diff
changeset
|
687 |
dos.write(b); |
2 | 688 |
dos.close(); |
689 |
return baos.toByteArray(); |
|
690 |
} |
|
691 |
||
692 |
private void write_iTXt() throws IOException { |
|
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
693 |
Iterator<String> keywordIter = metadata.iTXt_keyword.iterator(); |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
694 |
Iterator<Boolean> flagIter = metadata.iTXt_compressionFlag.iterator(); |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
695 |
Iterator<Integer> methodIter = metadata.iTXt_compressionMethod.iterator(); |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
696 |
Iterator<String> languageIter = metadata.iTXt_languageTag.iterator(); |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
697 |
Iterator<String> translatedKeywordIter = |
2 | 698 |
metadata.iTXt_translatedKeyword.iterator(); |
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
699 |
Iterator<String> textIter = metadata.iTXt_text.iterator(); |
2 | 700 |
|
701 |
while (keywordIter.hasNext()) { |
|
702 |
ChunkStream cs = new ChunkStream(PNGImageReader.iTXt_TYPE, stream); |
|
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
703 |
|
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
704 |
cs.writeBytes(keywordIter.next()); |
2 | 705 |
cs.writeByte(0); |
706 |
||
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
707 |
Boolean compressed = flagIter.next(); |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
708 |
cs.writeByte(compressed ? 1 : 0); |
2 | 709 |
|
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
710 |
cs.writeByte(methodIter.next().intValue()); |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
711 |
|
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
712 |
cs.writeBytes(languageIter.next()); |
2 | 713 |
cs.writeByte(0); |
714 |
||
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
715 |
|
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
716 |
cs.write(translatedKeywordIter.next().getBytes("UTF8")); |
2 | 717 |
cs.writeByte(0); |
718 |
||
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
719 |
String text = textIter.next(); |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
720 |
if (compressed) { |
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
721 |
cs.write(deflate(text.getBytes("UTF8"))); |
2 | 722 |
} else { |
1734
861400729115
6541476: PNG imageio plugin incorrectly handles iTXt chunk
bae
parents:
1715
diff
changeset
|
723 |
cs.write(text.getBytes("UTF8")); |
2 | 724 |
} |
725 |
cs.finish(); |
|
726 |
} |
|
727 |
} |
|
728 |
||
729 |
private void write_zTXt() throws IOException { |
|
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
730 |
Iterator<String> keywordIter = metadata.zTXt_keyword.iterator(); |
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
731 |
Iterator<Integer> methodIter = metadata.zTXt_compressionMethod.iterator(); |
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
732 |
Iterator<String> textIter = metadata.zTXt_text.iterator(); |
2 | 733 |
|
734 |
while (keywordIter.hasNext()) { |
|
735 |
ChunkStream cs = new ChunkStream(PNGImageReader.zTXt_TYPE, stream); |
|
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
736 |
String keyword = keywordIter.next(); |
2 | 737 |
cs.writeBytes(keyword); |
738 |
cs.writeByte(0); |
|
739 |
||
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
740 |
int compressionMethod = (methodIter.next()).intValue(); |
2 | 741 |
cs.writeByte(compressionMethod); |
742 |
||
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
743 |
String text = textIter.next(); |
2376
63e13f6d2319
6782079: PNG: reading metadata may cause OOM on truncated images.
bae
parents:
1734
diff
changeset
|
744 |
cs.write(deflate(text.getBytes("ISO-8859-1"))); |
2 | 745 |
cs.finish(); |
746 |
} |
|
747 |
} |
|
748 |
||
749 |
private void writeUnknownChunks() throws IOException { |
|
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
750 |
Iterator<String> typeIter = metadata.unknownChunkType.iterator(); |
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
751 |
Iterator<byte[]> dataIter = metadata.unknownChunkData.iterator(); |
2 | 752 |
|
753 |
while (typeIter.hasNext() && dataIter.hasNext()) { |
|
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
754 |
String type = typeIter.next(); |
2 | 755 |
ChunkStream cs = new ChunkStream(chunkType(type), stream); |
23312
4711f66e7d5c
8033716: Fix raw and unchecked lint warnings in com.sun.imageio
henryjen
parents:
5506
diff
changeset
|
756 |
byte[] data = dataIter.next(); |
2 | 757 |
cs.write(data); |
758 |
cs.finish(); |
|
759 |
} |
|
760 |
} |
|
761 |
||
762 |
private static int chunkType(String typeString) { |
|
763 |
char c0 = typeString.charAt(0); |
|
764 |
char c1 = typeString.charAt(1); |
|
765 |
char c2 = typeString.charAt(2); |
|
766 |
char c3 = typeString.charAt(3); |
|
767 |
||
768 |
int type = (c0 << 24) | (c1 << 16) | (c2 << 8) | c3; |
|
769 |
return type; |
|
770 |
} |
|
771 |
||
772 |
private void encodePass(ImageOutputStream os, |
|
773 |
RenderedImage image, |
|
774 |
int xOffset, int yOffset, |
|
775 |
int xSkip, int ySkip) throws IOException { |
|
776 |
int minX = sourceXOffset; |
|
777 |
int minY = sourceYOffset; |
|
778 |
int width = sourceWidth; |
|
779 |
int height = sourceHeight; |
|
780 |
||
781 |
// Adjust offsets and skips based on source subsampling factors |
|
782 |
xOffset *= periodX; |
|
783 |
xSkip *= periodX; |
|
784 |
yOffset *= periodY; |
|
785 |
ySkip *= periodY; |
|
786 |
||
787 |
// Early exit if no data for this pass |
|
788 |
int hpixels = (width - xOffset + xSkip - 1)/xSkip; |
|
789 |
int vpixels = (height - yOffset + ySkip - 1)/ySkip; |
|
790 |
if (hpixels == 0 || vpixels == 0) { |
|
791 |
return; |
|
792 |
} |
|
793 |
||
794 |
// Convert X offset and skip from pixels to samples |
|
795 |
xOffset *= numBands; |
|
796 |
xSkip *= numBands; |
|
797 |
||
798 |
// Create row buffers |
|
799 |
int samplesPerByte = 8/metadata.IHDR_bitDepth; |
|
800 |
int numSamples = width*numBands; |
|
801 |
int[] samples = new int[numSamples]; |
|
802 |
||
803 |
int bytesPerRow = hpixels*numBands; |
|
804 |
if (metadata.IHDR_bitDepth < 8) { |
|
805 |
bytesPerRow = (bytesPerRow + samplesPerByte - 1)/samplesPerByte; |
|
806 |
} else if (metadata.IHDR_bitDepth == 16) { |
|
807 |
bytesPerRow *= 2; |
|
808 |
} |
|
809 |
||
810 |
IndexColorModel icm_gray_alpha = null; |
|
811 |
if (metadata.IHDR_colorType == PNGImageReader.PNG_COLOR_GRAY_ALPHA && |
|
812 |
image.getColorModel() instanceof IndexColorModel) |
|
813 |
{ |
|
814 |
// reserve space for alpha samples |
|
815 |
bytesPerRow *= 2; |
|
816 |
||
817 |
// will be used to calculate alpha value for the pixel |
|
818 |
icm_gray_alpha = (IndexColorModel)image.getColorModel(); |
|
819 |
} |
|
820 |
||
821 |
currRow = new byte[bytesPerRow + bpp]; |
|
822 |
prevRow = new byte[bytesPerRow + bpp]; |
|
823 |
filteredRows = new byte[5][bytesPerRow + bpp]; |
|
824 |
||
825 |
int bitDepth = metadata.IHDR_bitDepth; |
|
826 |
for (int row = minY + yOffset; row < minY + height; row += ySkip) { |
|
827 |
Rectangle rect = new Rectangle(minX, row, width, 1); |
|
828 |
Raster ras = image.getData(rect); |
|
829 |
if (sourceBands != null) { |
|
830 |
ras = ras.createChild(minX, row, width, 1, minX, row, |
|
831 |
sourceBands); |
|
832 |
} |
|
833 |
||
834 |
ras.getPixels(minX, row, width, 1, samples); |
|
835 |
||
836 |
if (image.getColorModel().isAlphaPremultiplied()) { |
|
837 |
WritableRaster wr = ras.createCompatibleWritableRaster(); |
|
838 |
wr.setPixels(wr.getMinX(), wr.getMinY(), |
|
839 |
wr.getWidth(), wr.getHeight(), |
|
840 |
samples); |
|
841 |
||
842 |
image.getColorModel().coerceData(wr, false); |
|
843 |
wr.getPixels(wr.getMinX(), wr.getMinY(), |
|
844 |
wr.getWidth(), wr.getHeight(), |
|
845 |
samples); |
|
846 |
} |
|
847 |
||
848 |
// Reorder palette data if necessary |
|
849 |
int[] paletteOrder = metadata.PLTE_order; |
|
850 |
if (paletteOrder != null) { |
|
851 |
for (int i = 0; i < numSamples; i++) { |
|
852 |
samples[i] = paletteOrder[samples[i]]; |
|
853 |
} |
|
854 |
} |
|
855 |
||
856 |
int count = bpp; // leave first 'bpp' bytes zero |
|
857 |
int pos = 0; |
|
858 |
int tmp = 0; |
|
859 |
||
860 |
switch (bitDepth) { |
|
861 |
case 1: case 2: case 4: |
|
862 |
// Image can only have a single band |
|
863 |
||
864 |
int mask = samplesPerByte - 1; |
|
865 |
for (int s = xOffset; s < numSamples; s += xSkip) { |
|
866 |
byte val = scale0[samples[s]]; |
|
867 |
tmp = (tmp << bitDepth) | val; |
|
868 |
||
869 |
if ((pos++ & mask) == mask) { |
|
870 |
currRow[count++] = (byte)tmp; |
|
871 |
tmp = 0; |
|
872 |
pos = 0; |
|
873 |
} |
|
874 |
} |
|
875 |
||
876 |
// Left shift the last byte |
|
877 |
if ((pos & mask) != 0) { |
|
878 |
tmp <<= ((8/bitDepth) - pos)*bitDepth; |
|
879 |
currRow[count++] = (byte)tmp; |
|
880 |
} |
|
881 |
break; |
|
882 |
||
883 |
case 8: |
|
884 |
if (numBands == 1) { |
|
885 |
for (int s = xOffset; s < numSamples; s += xSkip) { |
|
886 |
currRow[count++] = scale0[samples[s]]; |
|
887 |
if (icm_gray_alpha != null) { |
|
888 |
currRow[count++] = |
|
889 |
scale0[icm_gray_alpha.getAlpha(0xff & samples[s])]; |
|
890 |
} |
|
891 |
} |
|
892 |
} else { |
|
893 |
for (int s = xOffset; s < numSamples; s += xSkip) { |
|
894 |
for (int b = 0; b < numBands; b++) { |
|
895 |
currRow[count++] = scale[b][samples[s + b]]; |
|
896 |
} |
|
897 |
} |
|
898 |
} |
|
899 |
break; |
|
900 |
||
901 |
case 16: |
|
902 |
for (int s = xOffset; s < numSamples; s += xSkip) { |
|
903 |
for (int b = 0; b < numBands; b++) { |
|
904 |
currRow[count++] = scaleh[b][samples[s + b]]; |
|
905 |
currRow[count++] = scalel[b][samples[s + b]]; |
|
906 |
} |
|
907 |
} |
|
908 |
break; |
|
909 |
} |
|
910 |
||
911 |
// Perform filtering |
|
912 |
int filterType = rowFilter.filterRow(metadata.IHDR_colorType, |
|
913 |
currRow, prevRow, |
|
914 |
filteredRows, |
|
915 |
bytesPerRow, bpp); |
|
916 |
||
917 |
os.write(filterType); |
|
918 |
os.write(filteredRows[filterType], bpp, bytesPerRow); |
|
919 |
||
920 |
// Swap current and previous rows |
|
921 |
byte[] swap = currRow; |
|
922 |
currRow = prevRow; |
|
923 |
prevRow = swap; |
|
924 |
||
925 |
pixelsDone += hpixels; |
|
926 |
processImageProgress(100.0F*pixelsDone/totalPixels); |
|
927 |
||
928 |
// If write has been aborted, just return; |
|
929 |
// processWriteAborted will be called later |
|
930 |
if (abortRequested()) { |
|
931 |
return; |
|
932 |
} |
|
933 |
} |
|
934 |
} |
|
935 |
||
936 |
// Use sourceXOffset, etc. |
|
937 |
private void write_IDAT(RenderedImage image) throws IOException { |
|
938 |
IDATOutputStream ios = new IDATOutputStream(stream, 32768); |
|
1715
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
939 |
try { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
940 |
if (metadata.IHDR_interlaceMethod == 1) { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
941 |
for (int i = 0; i < 7; i++) { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
942 |
encodePass(ios, image, |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
943 |
PNGImageReader.adam7XOffset[i], |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
944 |
PNGImageReader.adam7YOffset[i], |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
945 |
PNGImageReader.adam7XSubsampling[i], |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
946 |
PNGImageReader.adam7YSubsampling[i]); |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
947 |
if (abortRequested()) { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
948 |
break; |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
949 |
} |
2 | 950 |
} |
1715
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
951 |
} else { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
952 |
encodePass(ios, image, 0, 0, 1, 1); |
2 | 953 |
} |
1715
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
954 |
} finally { |
349c53487e78
6687968: PNGImageReader leaks native memory through an Inflater.
bae
parents:
2
diff
changeset
|
955 |
ios.finish(); |
2 | 956 |
} |
957 |
} |
|
958 |
||
959 |
private void writeIEND() throws IOException { |
|
960 |
ChunkStream cs = new ChunkStream(PNGImageReader.IEND_TYPE, stream); |
|
961 |
cs.finish(); |
|
962 |
} |
|
963 |
||
964 |
// Check two int arrays for value equality, always returns false |
|
965 |
// if either array is null |
|
966 |
private boolean equals(int[] s0, int[] s1) { |
|
967 |
if (s0 == null || s1 == null) { |
|
968 |
return false; |
|
969 |
} |
|
970 |
if (s0.length != s1.length) { |
|
971 |
return false; |
|
972 |
} |
|
973 |
for (int i = 0; i < s0.length; i++) { |
|
974 |
if (s0[i] != s1[i]) { |
|
975 |
return false; |
|
976 |
} |
|
977 |
} |
|
978 |
return true; |
|
979 |
} |
|
980 |
||
981 |
// Initialize the scale/scale0 or scaleh/scalel arrays to |
|
982 |
// hold the results of scaling an input value to the desired |
|
983 |
// output bit depth |
|
984 |
private void initializeScaleTables(int[] sampleSize) { |
|
985 |
int bitDepth = metadata.IHDR_bitDepth; |
|
986 |
||
987 |
// If the existing tables are still valid, just return |
|
988 |
if (bitDepth == scalingBitDepth && |
|
989 |
equals(sampleSize, this.sampleSize)) { |
|
990 |
return; |
|
991 |
} |
|
992 |
||
993 |
// Compute new tables |
|
994 |
this.sampleSize = sampleSize; |
|
995 |
this.scalingBitDepth = bitDepth; |
|
996 |
int maxOutSample = (1 << bitDepth) - 1; |
|
997 |
if (bitDepth <= 8) { |
|
998 |
scale = new byte[numBands][]; |
|
999 |
for (int b = 0; b < numBands; b++) { |
|
1000 |
int maxInSample = (1 << sampleSize[b]) - 1; |
|
1001 |
int halfMaxInSample = maxInSample/2; |
|
1002 |
scale[b] = new byte[maxInSample + 1]; |
|
1003 |
for (int s = 0; s <= maxInSample; s++) { |
|
1004 |
scale[b][s] = |
|
1005 |
(byte)((s*maxOutSample + halfMaxInSample)/maxInSample); |
|
1006 |
} |
|
1007 |
} |
|
1008 |
scale0 = scale[0]; |
|
1009 |
scaleh = scalel = null; |
|
1010 |
} else { // bitDepth == 16 |
|
1011 |
// Divide scaling table into high and low bytes |
|
1012 |
scaleh = new byte[numBands][]; |
|
1013 |
scalel = new byte[numBands][]; |
|
1014 |
||
1015 |
for (int b = 0; b < numBands; b++) { |
|
1016 |
int maxInSample = (1 << sampleSize[b]) - 1; |
|
1017 |
int halfMaxInSample = maxInSample/2; |
|
1018 |
scaleh[b] = new byte[maxInSample + 1]; |
|
1019 |
scalel[b] = new byte[maxInSample + 1]; |
|
1020 |
for (int s = 0; s <= maxInSample; s++) { |
|
1021 |
int val = (s*maxOutSample + halfMaxInSample)/maxInSample; |
|
1022 |
scaleh[b][s] = (byte)(val >> 8); |
|
1023 |
scalel[b][s] = (byte)(val & 0xff); |
|
1024 |
} |
|
1025 |
} |
|
1026 |
scale = null; |
|
1027 |
scale0 = null; |
|
1028 |
} |
|
1029 |
} |
|
1030 |
||
1031 |
public void write(IIOMetadata streamMetadata, |
|
1032 |
IIOImage image, |
|
1033 |
ImageWriteParam param) throws IIOException { |
|
1034 |
if (stream == null) { |
|
1035 |
throw new IllegalStateException("output == null!"); |
|
1036 |
} |
|
1037 |
if (image == null) { |
|
1038 |
throw new IllegalArgumentException("image == null!"); |
|
1039 |
} |
|
1040 |
if (image.hasRaster()) { |
|
1041 |
throw new UnsupportedOperationException("image has a Raster!"); |
|
1042 |
} |
|
1043 |
||
1044 |
RenderedImage im = image.getRenderedImage(); |
|
1045 |
SampleModel sampleModel = im.getSampleModel(); |
|
1046 |
this.numBands = sampleModel.getNumBands(); |
|
1047 |
||
1048 |
// Set source region and subsampling to default values |
|
1049 |
this.sourceXOffset = im.getMinX(); |
|
1050 |
this.sourceYOffset = im.getMinY(); |
|
1051 |
this.sourceWidth = im.getWidth(); |
|
1052 |
this.sourceHeight = im.getHeight(); |
|
1053 |
this.sourceBands = null; |
|
1054 |
this.periodX = 1; |
|
1055 |
this.periodY = 1; |
|
1056 |
||
1057 |
if (param != null) { |
|
1058 |
// Get source region and subsampling factors |
|
1059 |
Rectangle sourceRegion = param.getSourceRegion(); |
|
1060 |
if (sourceRegion != null) { |
|
1061 |
Rectangle imageBounds = new Rectangle(im.getMinX(), |
|
1062 |
im.getMinY(), |
|
1063 |
im.getWidth(), |
|
1064 |
im.getHeight()); |
|
1065 |
// Clip to actual image bounds |
|
1066 |
sourceRegion = sourceRegion.intersection(imageBounds); |
|
1067 |
sourceXOffset = sourceRegion.x; |
|
1068 |
sourceYOffset = sourceRegion.y; |
|
1069 |
sourceWidth = sourceRegion.width; |
|
1070 |
sourceHeight = sourceRegion.height; |
|
1071 |
} |
|
1072 |
||
1073 |
// Adjust for subsampling offsets |
|
1074 |
int gridX = param.getSubsamplingXOffset(); |
|
1075 |
int gridY = param.getSubsamplingYOffset(); |
|
1076 |
sourceXOffset += gridX; |
|
1077 |
sourceYOffset += gridY; |
|
1078 |
sourceWidth -= gridX; |
|
1079 |
sourceHeight -= gridY; |
|
1080 |
||
1081 |
// Get subsampling factors |
|
1082 |
periodX = param.getSourceXSubsampling(); |
|
1083 |
periodY = param.getSourceYSubsampling(); |
|
1084 |
||
1085 |
int[] sBands = param.getSourceBands(); |
|
1086 |
if (sBands != null) { |
|
1087 |
sourceBands = sBands; |
|
1088 |
numBands = sourceBands.length; |
|
1089 |
} |
|
1090 |
} |
|
1091 |
||
1092 |
// Compute output dimensions |
|
1093 |
int destWidth = (sourceWidth + periodX - 1)/periodX; |
|
1094 |
int destHeight = (sourceHeight + periodY - 1)/periodY; |
|
1095 |
if (destWidth <= 0 || destHeight <= 0) { |
|
1096 |
throw new IllegalArgumentException("Empty source region!"); |
|
1097 |
} |
|
1098 |
||
1099 |
// Compute total number of pixels for progress notification |
|
1100 |
this.totalPixels = destWidth*destHeight; |
|
1101 |
this.pixelsDone = 0; |
|
1102 |
||
1103 |
// Create metadata |
|
1104 |
IIOMetadata imd = image.getMetadata(); |
|
1105 |
if (imd != null) { |
|
1106 |
metadata = (PNGMetadata)convertImageMetadata(imd, |
|
1107 |
ImageTypeSpecifier.createFromRenderedImage(im), |
|
1108 |
null); |
|
1109 |
} else { |
|
1110 |
metadata = new PNGMetadata(); |
|
1111 |
} |
|
1112 |
||
1113 |
if (param != null) { |
|
1114 |
// Use Adam7 interlacing if set in write param |
|
1115 |
switch (param.getProgressiveMode()) { |
|
1116 |
case ImageWriteParam.MODE_DEFAULT: |
|
1117 |
metadata.IHDR_interlaceMethod = 1; |
|
1118 |
break; |
|
1119 |
case ImageWriteParam.MODE_DISABLED: |
|
1120 |
metadata.IHDR_interlaceMethod = 0; |
|
1121 |
break; |
|
1122 |
// MODE_COPY_FROM_METADATA should alreay be taken care of |
|
1123 |
// MODE_EXPLICIT is not allowed |
|
1124 |
} |
|
1125 |
} |
|
1126 |
||
1127 |
// Initialize bitDepth and colorType |
|
1128 |
metadata.initialize(new ImageTypeSpecifier(im), numBands); |
|
1129 |
||
1130 |
// Overwrite IHDR width and height values with values from image |
|
1131 |
metadata.IHDR_width = destWidth; |
|
1132 |
metadata.IHDR_height = destHeight; |
|
1133 |
||
1134 |
this.bpp = numBands*((metadata.IHDR_bitDepth == 16) ? 2 : 1); |
|
1135 |
||
1136 |
// Initialize scaling tables for this image |
|
1137 |
initializeScaleTables(sampleModel.getSampleSize()); |
|
1138 |
||
1139 |
clearAbortRequest(); |
|
1140 |
||
1141 |
processImageStarted(0); |
|
1142 |
||
1143 |
try { |
|
1144 |
write_magic(); |
|
1145 |
write_IHDR(); |
|
1146 |
||
1147 |
write_cHRM(); |
|
1148 |
write_gAMA(); |
|
1149 |
write_iCCP(); |
|
1150 |
write_sBIT(); |
|
1151 |
write_sRGB(); |
|
1152 |
||
1153 |
write_PLTE(); |
|
1154 |
||
1155 |
write_hIST(); |
|
1156 |
write_tRNS(); |
|
1157 |
write_bKGD(); |
|
1158 |
||
1159 |
write_pHYs(); |
|
1160 |
write_sPLT(); |
|
1161 |
write_tIME(); |
|
1162 |
write_tEXt(); |
|
1163 |
write_iTXt(); |
|
1164 |
write_zTXt(); |
|
1165 |
||
1166 |
writeUnknownChunks(); |
|
1167 |
||
1168 |
write_IDAT(im); |
|
1169 |
||
1170 |
if (abortRequested()) { |
|
1171 |
processWriteAborted(); |
|
1172 |
} else { |
|
1173 |
// Finish up and inform the listeners we are done |
|
1174 |
writeIEND(); |
|
1175 |
processImageComplete(); |
|
1176 |
} |
|
1177 |
} catch (IOException e) { |
|
1178 |
throw new IIOException("I/O error writing PNG file!", e); |
|
1179 |
} |
|
1180 |
} |
|
1181 |
} |