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Posted to commits@flex.apache.org by cf...@apache.org on 2012/10/25 21:01:49 UTC
svn commit: r1402274 [12/31] - in
/incubator/flex/sdk/branches/develop/modules/thirdparty/batik/sources/org/apache/flex/forks/batik/ext:
./ awt/ awt/color/ awt/font/ awt/g2d/ awt/geom/ awt/image/ awt/image/codec/
awt/image/codec/jpeg/ awt/image/codec/p...
Added: incubator/flex/sdk/branches/develop/modules/thirdparty/batik/sources/org/apache/flex/forks/batik/ext/awt/image/codec/png/PNGImageDecoder.java
URL: http://svn.apache.org/viewvc/incubator/flex/sdk/branches/develop/modules/thirdparty/batik/sources/org/apache/flex/forks/batik/ext/awt/image/codec/png/PNGImageDecoder.java?rev=1402274&view=auto
==============================================================================
--- incubator/flex/sdk/branches/develop/modules/thirdparty/batik/sources/org/apache/flex/forks/batik/ext/awt/image/codec/png/PNGImageDecoder.java (added)
+++ incubator/flex/sdk/branches/develop/modules/thirdparty/batik/sources/org/apache/flex/forks/batik/ext/awt/image/codec/png/PNGImageDecoder.java Thu Oct 25 19:01:43 2012
@@ -0,0 +1,1837 @@
+/*
+
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements. See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ */
+package org.apache.flex.forks.batik.ext.awt.image.codec.png;
+
+import java.awt.Color;
+import java.awt.Point;
+import java.awt.Transparency;
+import java.awt.color.ColorSpace;
+import java.awt.image.ColorModel;
+import java.awt.image.ComponentColorModel;
+import java.awt.image.DataBuffer;
+import java.awt.image.DataBufferByte;
+import java.awt.image.DataBufferUShort;
+import java.awt.image.IndexColorModel;
+import java.awt.image.Raster;
+import java.awt.image.RenderedImage;
+import java.awt.image.SampleModel;
+import java.awt.image.WritableRaster;
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.SequenceInputStream;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+import org.apache.flex.forks.batik.ext.awt.image.codec.util.ImageDecoderImpl;
+import org.apache.flex.forks.batik.ext.awt.image.codec.util.PropertyUtil;
+import org.apache.flex.forks.batik.ext.awt.image.codec.util.SimpleRenderedImage;
+
+/**
+ * @version $Id: PNGImageDecoder.java 522271 2007-03-25 14:42:45Z dvholten $
+ */
+public class PNGImageDecoder extends ImageDecoderImpl {
+
+ public PNGImageDecoder(InputStream input,
+ PNGDecodeParam param) {
+ super(input, param);
+ }
+
+ public RenderedImage decodeAsRenderedImage(int page) throws IOException {
+ if (page != 0) {
+ throw new IOException(PropertyUtil.getString("PNGImageDecoder19"));
+ }
+ return new PNGImage(input, (PNGDecodeParam)param);
+ }
+}
+
+class PNGChunk {
+ int length;
+ int type;
+ byte[] data;
+ int crc;
+
+ final String typeString;
+
+ PNGChunk(int length, int type, byte[] data, int crc) {
+ this.length = length;
+ this.type = type;
+ this.data = data;
+ this.crc = crc;
+
+ typeString = ""
+ + (char)((type >>> 24) & 0xff)
+ + (char)((type >>> 16) & 0xff)
+ + (char)((type >>> 8) & 0xff)
+ + (char)((type ) & 0xff);
+ }
+
+ public int getLength() {
+ return length;
+ }
+
+ public int getType() {
+ return type;
+ }
+
+ public String getTypeString() {
+ return typeString;
+ }
+
+ public byte[] getData() {
+ return data;
+ }
+
+ public byte getByte(int offset) {
+ return data[offset];
+ }
+
+ public int getInt1(int offset) {
+ return data[offset] & 0xff;
+ }
+
+ public int getInt2(int offset) {
+ return ((data[offset] & 0xff) << 8) |
+ (data[offset + 1] & 0xff);
+ }
+
+ public int getInt4(int offset) {
+ return ((data[offset] & 0xff) << 24) |
+ ((data[offset + 1] & 0xff) << 16) |
+ ((data[offset + 2] & 0xff) << 8) |
+ (data[offset + 3] & 0xff);
+ }
+
+ public String getString4(int offset) {
+ return ""
+ + (char)data[offset]
+ + (char)data[offset + 1]
+ + (char)data[offset + 2]
+ + (char)data[offset + 3];
+ }
+
+ public boolean isType(String typeName) {
+ return typeString.equals(typeName);
+ }
+}
+
+/**
+ * TO DO:
+ *
+ * zTXt chunks
+ *
+ */
+class PNGImage extends SimpleRenderedImage {
+
+ public static final int PNG_COLOR_GRAY = 0;
+ public static final int PNG_COLOR_RGB = 2;
+ public static final int PNG_COLOR_PALETTE = 3;
+ public static final int PNG_COLOR_GRAY_ALPHA = 4;
+ public static final int PNG_COLOR_RGB_ALPHA = 6;
+
+ private static final String[] colorTypeNames = {
+ "Grayscale", "Error", "Truecolor", "Index",
+ "Grayscale with alpha", "Error", "Truecolor with alpha"
+ };
+
+ public static final int PNG_FILTER_NONE = 0;
+ public static final int PNG_FILTER_SUB = 1;
+ public static final int PNG_FILTER_UP = 2;
+ public static final int PNG_FILTER_AVERAGE = 3;
+ public static final int PNG_FILTER_PAETH = 4;
+
+ private int[][] bandOffsets = {
+ null,
+ { 0 }, // G
+ { 0, 1 }, // GA in GA order
+ { 0, 1, 2 }, // RGB in RGB order
+ { 0, 1, 2, 3 } // RGBA in RGBA order
+ };
+
+ private int bitDepth;
+ private int colorType;
+
+ private int compressionMethod;
+ private int filterMethod;
+ private int interlaceMethod;
+
+ private int paletteEntries;
+ private byte[] redPalette;
+ private byte[] greenPalette;
+ private byte[] bluePalette;
+ private byte[] alphaPalette;
+
+ private int bkgdRed;
+ private int bkgdGreen;
+ private int bkgdBlue;
+
+ private int grayTransparentAlpha;
+ private int redTransparentAlpha;
+ private int greenTransparentAlpha;
+ private int blueTransparentAlpha;
+
+ private int maxOpacity;
+
+ private int[] significantBits = null;
+
+ // Parameter information
+
+ // If true, the user wants destination alpha where applicable.
+ private boolean suppressAlpha = false;
+
+ // If true, perform palette lookup internally
+ private boolean expandPalette = false;
+
+ // If true, output < 8 bit gray images in 8 bit components format
+ private boolean output8BitGray = false;
+
+ // Create an alpha channel in the destination color model.
+ private boolean outputHasAlphaPalette = false;
+
+ // Perform gamma correction on the image
+ private boolean performGammaCorrection = false;
+
+ // Expand GA to GGGA for compatbility with Java2D
+ private boolean expandGrayAlpha = false;
+
+ // Produce an instance of PNGEncodeParam
+ private boolean generateEncodeParam = false;
+
+ // PNGDecodeParam controlling decode process
+ private PNGDecodeParam decodeParam = null;
+
+ // PNGEncodeParam to store file details in
+ private PNGEncodeParam encodeParam = null;
+
+ private boolean emitProperties = true;
+
+ private float fileGamma = 45455/100000.0F;
+
+ private float userExponent = 1.0F;
+
+ private float displayExponent = 2.2F;
+
+ private float[] chromaticity = null;
+
+ private int sRGBRenderingIntent = -1;
+
+ // Post-processing step implied by above parameters
+ private int postProcess = POST_NONE;
+
+ // Possible post-processing steps
+
+ // Do nothing
+ private static final int POST_NONE = 0;
+
+ // Gamma correct only
+ private static final int POST_GAMMA = 1;
+
+ // Push gray values through grayLut to expand to 8 bits
+ private static final int POST_GRAY_LUT = 2;
+
+ // Push gray values through grayLut to expand to 8 bits, add alpha
+ private static final int POST_GRAY_LUT_ADD_TRANS = 3;
+
+ // Push palette value through R,G,B lookup tables
+ private static final int POST_PALETTE_TO_RGB = 4;
+
+ // Push palette value through R,G,B,A lookup tables
+ private static final int POST_PALETTE_TO_RGBA = 5;
+
+ // Add transparency to a given gray value (w/ optional gamma)
+ private static final int POST_ADD_GRAY_TRANS = 6;
+
+ // Add transparency to a given RGB value (w/ optional gamma)
+ private static final int POST_ADD_RGB_TRANS = 7;
+
+ // Remove the alpha channel from a gray image (w/ optional gamma)
+ private static final int POST_REMOVE_GRAY_TRANS = 8;
+
+ // Remove the alpha channel from an RGB image (w/optional gamma)
+ private static final int POST_REMOVE_RGB_TRANS = 9;
+
+ // Mask to add expansion of GA -> GGGA
+ private static final int POST_EXP_MASK = 16;
+
+ // Expand gray to G/G/G
+ private static final int POST_GRAY_ALPHA_EXP =
+ POST_NONE | POST_EXP_MASK;
+
+ // Expand gray to G/G/G through a gamma lut
+ private static final int POST_GAMMA_EXP =
+ POST_GAMMA | POST_EXP_MASK;
+
+ // Push gray values through grayLut to expand to 8 bits, expand, add alpha
+ private static final int POST_GRAY_LUT_ADD_TRANS_EXP =
+ POST_GRAY_LUT_ADD_TRANS | POST_EXP_MASK;
+
+ // Add transparency to a given gray value, expand
+ private static final int POST_ADD_GRAY_TRANS_EXP =
+ POST_ADD_GRAY_TRANS | POST_EXP_MASK;
+
+ private List streamVec = new ArrayList();
+ private DataInputStream dataStream;
+
+ private int bytesPerPixel; // number of bytes per input pixel
+ private int inputBands;
+ private int outputBands;
+
+ // Number of private chunks
+ private int chunkIndex = 0;
+
+ private List textKeys = new ArrayList();
+ private List textStrings = new ArrayList();
+
+ private List ztextKeys = new ArrayList();
+ private List ztextStrings = new ArrayList();
+
+ private WritableRaster theTile;
+
+ private int[] gammaLut = null;
+
+ private void initGammaLut(int bits) {
+ double exp = (double)userExponent/(fileGamma*displayExponent);
+ int numSamples = 1 << bits;
+ int maxOutSample = (bits == 16) ? 65535 : 255;
+
+ gammaLut = new int[numSamples];
+ for (int i = 0; i < numSamples; i++) {
+ double gbright = (double)i/(numSamples - 1);
+ double gamma = Math.pow(gbright, exp);
+ int igamma = (int)(gamma*maxOutSample + 0.5);
+ if (igamma > maxOutSample) {
+ igamma = maxOutSample;
+ }
+ gammaLut[i] = igamma;
+ }
+ }
+
+ private final byte[][] expandBits = {
+ null,
+ { (byte)0x00, (byte)0xff },
+ { (byte)0x00, (byte)0x55, (byte)0xaa, (byte)0xff },
+ null,
+ { (byte)0x00, (byte)0x11, (byte)0x22, (byte)0x33,
+ (byte)0x44, (byte)0x55, (byte)0x66, (byte)0x77,
+ (byte)0x88, (byte)0x99, (byte)0xaa, (byte)0xbb,
+ (byte)0xcc, (byte)0xdd, (byte)0xee, (byte)0xff }
+ };
+
+ private int[] grayLut = null;
+
+ private void initGrayLut(int bits) {
+ int len = 1 << bits;
+ grayLut = new int[len];
+
+ if (performGammaCorrection) {
+ System.arraycopy( gammaLut, 0, grayLut, 0, len );
+ } else {
+ for (int i = 0; i < len; i++) {
+ grayLut[i] = expandBits[bits][i];
+ }
+ }
+ }
+
+ public PNGImage(InputStream stream, PNGDecodeParam decodeParam)
+ throws IOException {
+
+ if (!stream.markSupported()) {
+ stream = new BufferedInputStream(stream);
+ }
+ DataInputStream distream = new DataInputStream(stream);
+
+ if (decodeParam == null) {
+ decodeParam = new PNGDecodeParam();
+ }
+ this.decodeParam = decodeParam;
+
+ // Get parameter values
+ this.suppressAlpha = decodeParam.getSuppressAlpha();
+ this.expandPalette = decodeParam.getExpandPalette();
+ this.output8BitGray = decodeParam.getOutput8BitGray();
+ this.expandGrayAlpha = decodeParam.getExpandGrayAlpha();
+ if (decodeParam.getPerformGammaCorrection()) {
+ this.userExponent = decodeParam.getUserExponent();
+ this.displayExponent = decodeParam.getDisplayExponent();
+ performGammaCorrection = true;
+ output8BitGray = true;
+ }
+ this.generateEncodeParam = decodeParam.getGenerateEncodeParam();
+
+ if (emitProperties) {
+ properties.put("file_type", "PNG v. 1.0");
+ }
+
+ try {
+ long magic = distream.readLong();
+ if (magic != 0x89504e470d0a1a0aL) {
+ String msg = PropertyUtil.getString("PNGImageDecoder0");
+ throw new RuntimeException(msg);
+ }
+ } catch (Exception e) {
+ e.printStackTrace();
+ String msg = PropertyUtil.getString("PNGImageDecoder1");
+ throw new RuntimeException(msg);
+ }
+
+ do {
+ try {
+ PNGChunk chunk;
+
+ String chunkType = getChunkType(distream);
+ if (chunkType.equals("IHDR")) {
+ chunk = readChunk(distream);
+ parse_IHDR_chunk(chunk);
+ } else if (chunkType.equals("PLTE")) {
+ chunk = readChunk(distream);
+ parse_PLTE_chunk(chunk);
+ } else if (chunkType.equals("IDAT")) {
+ chunk = readChunk(distream);
+ streamVec.add(new ByteArrayInputStream(chunk.getData()));
+ } else if (chunkType.equals("IEND")) {
+ chunk = readChunk(distream);
+ parse_IEND_chunk(chunk);
+ break; // fall through to the bottom
+ } else if (chunkType.equals("bKGD")) {
+ chunk = readChunk(distream);
+ parse_bKGD_chunk(chunk);
+ } else if (chunkType.equals("cHRM")) {
+ chunk = readChunk(distream);
+ parse_cHRM_chunk(chunk);
+ } else if (chunkType.equals("gAMA")) {
+ chunk = readChunk(distream);
+ parse_gAMA_chunk(chunk);
+ } else if (chunkType.equals("hIST")) {
+ chunk = readChunk(distream);
+ parse_hIST_chunk(chunk);
+ } else if (chunkType.equals("iCCP")) {
+ chunk = readChunk(distream);
+ parse_iCCP_chunk(chunk);
+ } else if (chunkType.equals("pHYs")) {
+ chunk = readChunk(distream);
+ parse_pHYs_chunk(chunk);
+ } else if (chunkType.equals("sBIT")) {
+ chunk = readChunk(distream);
+ parse_sBIT_chunk(chunk);
+ } else if (chunkType.equals("sRGB")) {
+ chunk = readChunk(distream);
+ parse_sRGB_chunk(chunk);
+ } else if (chunkType.equals("tEXt")) {
+ chunk = readChunk(distream);
+ parse_tEXt_chunk(chunk);
+ } else if (chunkType.equals("tIME")) {
+ chunk = readChunk(distream);
+ parse_tIME_chunk(chunk);
+ } else if (chunkType.equals("tRNS")) {
+ chunk = readChunk(distream);
+ parse_tRNS_chunk(chunk);
+ } else if (chunkType.equals("zTXt")) {
+ chunk = readChunk(distream);
+ parse_zTXt_chunk(chunk);
+ } else {
+ chunk = readChunk(distream);
+ // Output the chunk data in raw form
+
+ String type = chunk.getTypeString();
+ byte[] data = chunk.getData();
+ if (encodeParam != null) {
+ encodeParam.addPrivateChunk(type, data);
+ }
+ if (emitProperties) {
+ String key = "chunk_" + chunkIndex++ + ':' + type;
+ properties.put(key.toLowerCase(), data);
+ }
+ }
+ } catch (Exception e) {
+ e.printStackTrace();
+ String msg = PropertyUtil.getString("PNGImageDecoder2");
+ throw new RuntimeException(msg);
+ }
+ } while (true);
+
+ // Final post-processing
+
+ if (significantBits == null) {
+ significantBits = new int[inputBands];
+ for (int i = 0; i < inputBands; i++) {
+ significantBits[i] = bitDepth;
+ }
+
+ if (emitProperties) {
+ properties.put("significant_bits", significantBits);
+ }
+ }
+ }
+
+ private static String getChunkType(DataInputStream distream) {
+ try {
+ distream.mark(8);
+ /* int length = */ distream.readInt();
+ int type = distream.readInt();
+ distream.reset();
+
+ String typeString = ""; // todo simplify this
+ typeString += (char)(type >> 24);
+ typeString += (char)((type >> 16) & 0xff);
+ typeString += (char)((type >> 8) & 0xff);
+ typeString += (char)(type & 0xff);
+ return typeString;
+ } catch (Exception e) {
+ e.printStackTrace();
+ return null;
+ }
+ }
+
+ private static PNGChunk readChunk(DataInputStream distream) {
+ try {
+ int length = distream.readInt();
+ int type = distream.readInt();
+ byte[] data = new byte[length];
+ distream.readFully(data);
+ int crc = distream.readInt();
+
+ return new PNGChunk(length, type, data, crc);
+ } catch (Exception e) {
+ e.printStackTrace();
+ return null;
+ }
+ }
+
+ private void parse_IHDR_chunk(PNGChunk chunk) {
+ tileWidth = width = chunk.getInt4(0);
+ tileHeight = height = chunk.getInt4(4);
+
+ bitDepth = chunk.getInt1(8);
+
+ if ((bitDepth != 1) && (bitDepth != 2) && (bitDepth != 4) &&
+ (bitDepth != 8) && (bitDepth != 16)) {
+ // Error -- bad bit depth
+ String msg = PropertyUtil.getString("PNGImageDecoder3");
+ throw new RuntimeException(msg);
+ }
+ maxOpacity = (1 << bitDepth) - 1;
+
+ colorType = chunk.getInt1(9);
+ if ((colorType != PNG_COLOR_GRAY) &&
+ (colorType != PNG_COLOR_RGB) &&
+ (colorType != PNG_COLOR_PALETTE) &&
+ (colorType != PNG_COLOR_GRAY_ALPHA) &&
+ (colorType != PNG_COLOR_RGB_ALPHA)) {
+ System.out.println(PropertyUtil.getString("PNGImageDecoder4"));
+ }
+
+ if ((colorType == PNG_COLOR_RGB) && (bitDepth < 8)) {
+ // Error -- RGB images must have 8 or 16 bits
+ String msg = PropertyUtil.getString("PNGImageDecoder5");
+ throw new RuntimeException(msg);
+ }
+
+ if ((colorType == PNG_COLOR_PALETTE) && (bitDepth == 16)) {
+ // Error -- palette images must have < 16 bits
+ String msg = PropertyUtil.getString("PNGImageDecoder6");
+ throw new RuntimeException(msg);
+ }
+
+ if ((colorType == PNG_COLOR_GRAY_ALPHA) && (bitDepth < 8)) {
+ // Error -- gray/alpha images must have >= 8 bits
+ String msg = PropertyUtil.getString("PNGImageDecoder7");
+ throw new RuntimeException(msg);
+ }
+
+ if ((colorType == PNG_COLOR_RGB_ALPHA) && (bitDepth < 8)) {
+ // Error -- RGB/alpha images must have >= 8 bits
+ String msg = PropertyUtil.getString("PNGImageDecoder8");
+ throw new RuntimeException(msg);
+ }
+
+ if (emitProperties) {
+ properties.put("color_type", colorTypeNames[colorType]);
+ }
+
+ if (generateEncodeParam) {
+ if (colorType == PNG_COLOR_PALETTE) {
+ encodeParam = new PNGEncodeParam.Palette();
+ } else if (colorType == PNG_COLOR_GRAY ||
+ colorType == PNG_COLOR_GRAY_ALPHA) {
+ encodeParam = new PNGEncodeParam.Gray();
+ } else {
+ encodeParam = new PNGEncodeParam.RGB();
+ }
+ decodeParam.setEncodeParam(encodeParam);
+ }
+
+ if (encodeParam != null) {
+ encodeParam.setBitDepth(bitDepth);
+ }
+ if (emitProperties) {
+ properties.put("bit_depth", new Integer(bitDepth));
+ }
+
+ if (performGammaCorrection) {
+ // Assume file gamma is 1/2.2 unless we get a gAMA chunk
+ float gamma = (1.0F/2.2F)*(displayExponent/userExponent);
+ if (encodeParam != null) {
+ encodeParam.setGamma(gamma);
+ }
+ if (emitProperties) {
+ properties.put("gamma", new Float(gamma));
+ }
+ }
+
+ compressionMethod = chunk.getInt1(10);
+ if (compressionMethod != 0) {
+ // Error -- only know about compression method 0
+ String msg = PropertyUtil.getString("PNGImageDecoder9");
+ throw new RuntimeException(msg);
+ }
+
+ filterMethod = chunk.getInt1(11);
+ if (filterMethod != 0) {
+ // Error -- only know about filter method 0
+ String msg = PropertyUtil.getString("PNGImageDecoder10");
+ throw new RuntimeException(msg);
+ }
+
+ interlaceMethod = chunk.getInt1(12);
+ if (interlaceMethod == 0) {
+ if (encodeParam != null) {
+ encodeParam.setInterlacing(false);
+ }
+ if (emitProperties) {
+ properties.put("interlace_method", "None");
+ }
+ } else if (interlaceMethod == 1) {
+ if (encodeParam != null) {
+ encodeParam.setInterlacing(true);
+ }
+ if (emitProperties) {
+ properties.put("interlace_method", "Adam7");
+ }
+ } else {
+ // Error -- only know about Adam7 interlacing
+ String msg = PropertyUtil.getString("PNGImageDecoder11");
+ throw new RuntimeException(msg);
+ }
+
+ bytesPerPixel = (bitDepth == 16) ? 2 : 1;
+
+ switch (colorType) {
+ case PNG_COLOR_GRAY:
+ inputBands = 1;
+ outputBands = 1;
+
+ if (output8BitGray && (bitDepth < 8)) {
+ postProcess = POST_GRAY_LUT;
+ } else if (performGammaCorrection) {
+ postProcess = POST_GAMMA;
+ } else {
+ postProcess = POST_NONE;
+ }
+ break;
+
+ case PNG_COLOR_RGB:
+ inputBands = 3;
+ bytesPerPixel *= 3;
+ outputBands = 3;
+
+ if (performGammaCorrection) {
+ postProcess = POST_GAMMA;
+ } else {
+ postProcess = POST_NONE;
+ }
+ break;
+
+ case PNG_COLOR_PALETTE:
+ inputBands = 1;
+ bytesPerPixel = 1;
+ outputBands = expandPalette ? 3 : 1;
+
+ if (expandPalette) {
+ postProcess = POST_PALETTE_TO_RGB;
+ } else {
+ postProcess = POST_NONE;
+ }
+ break;
+
+ case PNG_COLOR_GRAY_ALPHA:
+ inputBands = 2;
+ bytesPerPixel *= 2;
+
+ if (suppressAlpha) {
+ outputBands = 1;
+ postProcess = POST_REMOVE_GRAY_TRANS;
+ } else {
+ if (performGammaCorrection) {
+ postProcess = POST_GAMMA;
+ } else {
+ postProcess = POST_NONE;
+ }
+ if (expandGrayAlpha) {
+ postProcess |= POST_EXP_MASK;
+ outputBands = 4;
+ } else {
+ outputBands = 2;
+ }
+ }
+ break;
+
+ case PNG_COLOR_RGB_ALPHA:
+ inputBands = 4;
+ bytesPerPixel *= 4;
+ outputBands = (!suppressAlpha) ? 4 : 3;
+
+ if (suppressAlpha) {
+ postProcess = POST_REMOVE_RGB_TRANS;
+ } else if (performGammaCorrection) {
+ postProcess = POST_GAMMA;
+ } else {
+ postProcess = POST_NONE;
+ }
+ break;
+ }
+ }
+
+ private void parse_IEND_chunk(PNGChunk chunk) throws Exception {
+ // Store text strings
+ int textLen = textKeys.size();
+ String[] textArray = new String[2*textLen];
+ for (int i = 0; i < textLen; i++) {
+ String key = (String)textKeys.get(i);
+ String val = (String)textStrings.get(i);
+ textArray[2*i] = key;
+ textArray[2*i + 1] = val;
+ if (emitProperties) {
+ String uniqueKey = "text_" + i + ':' + key;
+ properties.put(uniqueKey.toLowerCase(), val);
+ }
+ }
+ if (encodeParam != null) {
+ encodeParam.setText(textArray);
+ }
+
+ // Store compressed text strings
+ int ztextLen = ztextKeys.size();
+ String[] ztextArray = new String[2*ztextLen];
+ for (int i = 0; i < ztextLen; i++) {
+ String key = (String)ztextKeys.get(i);
+ String val = (String)ztextStrings.get(i);
+ ztextArray[2*i] = key;
+ ztextArray[2*i + 1] = val;
+ if (emitProperties) {
+ String uniqueKey = "ztext_" + i + ':' + key;
+ properties.put(uniqueKey.toLowerCase(), val);
+ }
+ }
+ if (encodeParam != null) {
+ encodeParam.setCompressedText(ztextArray);
+ }
+
+ // Parse prior IDAT chunks
+ InputStream seqStream =
+ new SequenceInputStream( Collections.enumeration( streamVec ) );
+ InputStream infStream =
+ new InflaterInputStream(seqStream, new Inflater());
+ dataStream = new DataInputStream(infStream);
+
+ // Create an empty WritableRaster
+ int depth = bitDepth;
+ if ((colorType == PNG_COLOR_GRAY) &&
+ (bitDepth < 8) && output8BitGray) {
+ depth = 8;
+ }
+ if ((colorType == PNG_COLOR_PALETTE) && expandPalette) {
+ depth = 8;
+ }
+ int bytesPerRow = (outputBands*width*depth + 7)/8;
+ int scanlineStride =
+ (depth == 16) ? (bytesPerRow/2) : bytesPerRow;
+
+ theTile = createRaster(width, height, outputBands,
+ scanlineStride,
+ depth);
+
+ if (performGammaCorrection && (gammaLut == null)) {
+ initGammaLut(bitDepth);
+ }
+ if ((postProcess == POST_GRAY_LUT) ||
+ (postProcess == POST_GRAY_LUT_ADD_TRANS) ||
+ (postProcess == POST_GRAY_LUT_ADD_TRANS_EXP)) {
+ initGrayLut(bitDepth);
+ }
+
+ decodeImage(interlaceMethod == 1);
+ sampleModel = theTile.getSampleModel();
+
+ if ((colorType == PNG_COLOR_PALETTE) && !expandPalette) {
+ if (outputHasAlphaPalette) {
+ colorModel = new IndexColorModel(bitDepth,
+ paletteEntries,
+ redPalette,
+ greenPalette,
+ bluePalette,
+ alphaPalette);
+ } else {
+ colorModel = new IndexColorModel(bitDepth,
+ paletteEntries,
+ redPalette,
+ greenPalette,
+ bluePalette);
+ }
+ } else if ((colorType == PNG_COLOR_GRAY) &&
+ (bitDepth < 8) && !output8BitGray) {
+ byte[] palette = expandBits[bitDepth];
+ colorModel = new IndexColorModel(bitDepth,
+ palette.length,
+ palette,
+ palette,
+ palette);
+ } else {
+ colorModel =
+ createComponentColorModel(sampleModel);
+ }
+ }
+
+ private static final int[] GrayBits8 = { 8 };
+ private static final ComponentColorModel colorModelGray8 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),
+ GrayBits8, false, false,
+ Transparency.OPAQUE,
+ DataBuffer.TYPE_BYTE);
+
+ private static final int[] GrayAlphaBits8 = { 8, 8 };
+ private static final ComponentColorModel colorModelGrayAlpha8 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),
+ GrayAlphaBits8, true, false,
+ Transparency.TRANSLUCENT,
+ DataBuffer.TYPE_BYTE);
+
+ private static final int[] GrayBits16 = { 16 };
+ private static final ComponentColorModel colorModelGray16 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),
+ GrayBits16, false, false,
+ Transparency.OPAQUE,
+ DataBuffer.TYPE_USHORT);
+
+ private static final int[] GrayAlphaBits16 = { 16, 16 };
+ private static final ComponentColorModel colorModelGrayAlpha16 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),
+ GrayAlphaBits16, true, false,
+ Transparency.TRANSLUCENT,
+ DataBuffer.TYPE_USHORT);
+
+ private static final int[] GrayBits32 = { 32 };
+ private static final ComponentColorModel colorModelGray32 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),
+ GrayBits32, false, false,
+ Transparency.OPAQUE,
+ DataBuffer.TYPE_INT);
+
+ private static final int[] GrayAlphaBits32 = { 32, 32 };
+ private static final ComponentColorModel colorModelGrayAlpha32 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_GRAY),
+ GrayAlphaBits32, true, false,
+ Transparency.TRANSLUCENT,
+ DataBuffer.TYPE_INT);
+
+ private static final int[] RGBBits8 = { 8, 8, 8 };
+ private static final ComponentColorModel colorModelRGB8 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ RGBBits8, false, false,
+ Transparency.OPAQUE,
+ DataBuffer.TYPE_BYTE);
+
+ private static final int[] RGBABits8 = { 8, 8, 8, 8 };
+ private static final ComponentColorModel colorModelRGBA8 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ RGBABits8, true, false,
+ Transparency.TRANSLUCENT,
+ DataBuffer.TYPE_BYTE);
+
+ private static final int[] RGBBits16 = { 16, 16, 16 };
+ private static final ComponentColorModel colorModelRGB16 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ RGBBits16, false, false,
+ Transparency.OPAQUE,
+ DataBuffer.TYPE_USHORT);
+
+ private static final int[] RGBABits16 = { 16, 16, 16, 16 };
+ private static final ComponentColorModel colorModelRGBA16 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ RGBABits16, true, false,
+ Transparency.TRANSLUCENT,
+ DataBuffer.TYPE_USHORT);
+
+ private static final int[] RGBBits32 = { 32, 32, 32 };
+ private static final ComponentColorModel colorModelRGB32 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ RGBBits32, false, false,
+ Transparency.OPAQUE,
+ DataBuffer.TYPE_INT);
+
+ private static final int[] RGBABits32 = { 32, 32, 32, 32 };
+ private static final ComponentColorModel colorModelRGBA32 =
+ new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ RGBABits32, true, false,
+ Transparency.TRANSLUCENT,
+ DataBuffer.TYPE_INT);
+ /**
+ * A convenience method to create an instance of
+ * <code>ComponentColorModel</code> suitable for use with the
+ * given <code>SampleModel</code>. The <code>SampleModel</code>
+ * should have a data type of <code>DataBuffer.TYPE_BYTE</code>,
+ * <code>TYPE_USHORT</code>, or <code>TYPE_INT</code> and between
+ * 1 and 4 bands. Depending on the number of bands of the
+ * <code>SampleModel</code>, either a gray, gray+alpha, rgb, or
+ * rgb+alpha <code>ColorModel</code> is returned.
+ */
+ public static ColorModel createComponentColorModel(SampleModel sm) {
+ int type = sm.getDataType();
+ int bands = sm.getNumBands();
+ ComponentColorModel cm = null;
+
+ if (type == DataBuffer.TYPE_BYTE) {
+ switch (bands) {
+ case 1:
+ cm = colorModelGray8;
+ break;
+ case 2:
+ cm = colorModelGrayAlpha8;
+ break;
+ case 3:
+ cm = colorModelRGB8;
+ break;
+ case 4:
+ cm = colorModelRGBA8;
+ break;
+ }
+ } else if (type == DataBuffer.TYPE_USHORT) {
+ switch (bands) {
+ case 1:
+ cm = colorModelGray16;
+ break;
+ case 2:
+ cm = colorModelGrayAlpha16;
+ break;
+ case 3:
+ cm = colorModelRGB16;
+ break;
+ case 4:
+ cm = colorModelRGBA16;
+ break;
+ }
+ } else if (type == DataBuffer.TYPE_INT) {
+ switch (bands) {
+ case 1:
+ cm = colorModelGray32;
+ break;
+ case 2:
+ cm = colorModelGrayAlpha32;
+ break;
+ case 3:
+ cm = colorModelRGB32;
+ break;
+ case 4:
+ cm = colorModelRGBA32;
+ break;
+ }
+ }
+
+ return cm;
+ }
+
+ private void parse_PLTE_chunk(PNGChunk chunk) {
+ paletteEntries = chunk.getLength()/3;
+ redPalette = new byte[paletteEntries];
+ greenPalette = new byte[paletteEntries];
+ bluePalette = new byte[paletteEntries];
+
+ int pltIndex = 0;
+
+ // gAMA chunk must precede PLTE chunk
+ if (performGammaCorrection) {
+ if (gammaLut == null) {
+ initGammaLut(bitDepth == 16 ? 16 : 8);
+ }
+
+ for (int i = 0; i < paletteEntries; i++) {
+ byte r = chunk.getByte(pltIndex++);
+ byte g = chunk.getByte(pltIndex++);
+ byte b = chunk.getByte(pltIndex++);
+
+ redPalette[i] = (byte)gammaLut[r & 0xff];
+ greenPalette[i] = (byte)gammaLut[g & 0xff];
+ bluePalette[i] = (byte)gammaLut[b & 0xff];
+ }
+ } else {
+ for (int i = 0; i < paletteEntries; i++) {
+ redPalette[i] = chunk.getByte(pltIndex++);
+ greenPalette[i] = chunk.getByte(pltIndex++);
+ bluePalette[i] = chunk.getByte(pltIndex++);
+ }
+ }
+ }
+
+ private void parse_bKGD_chunk(PNGChunk chunk) {
+ switch (colorType) {
+ case PNG_COLOR_PALETTE:
+ int bkgdIndex = chunk.getByte(0) & 0xff;
+
+ bkgdRed = redPalette[bkgdIndex] & 0xff;
+ bkgdGreen = greenPalette[bkgdIndex] & 0xff;
+ bkgdBlue = bluePalette[bkgdIndex] & 0xff;
+
+ if (encodeParam != null) {
+ ((PNGEncodeParam.Palette)encodeParam).
+ setBackgroundPaletteIndex(bkgdIndex);
+ }
+ break;
+ case PNG_COLOR_GRAY: case PNG_COLOR_GRAY_ALPHA:
+ int bkgdGray = chunk.getInt2(0);
+ bkgdRed = bkgdGreen = bkgdBlue = bkgdGray;
+
+ if (encodeParam != null) {
+ ((PNGEncodeParam.Gray)encodeParam).
+ setBackgroundGray(bkgdGray);
+ }
+ break;
+ case PNG_COLOR_RGB: case PNG_COLOR_RGB_ALPHA:
+ bkgdRed = chunk.getInt2(0);
+ bkgdGreen = chunk.getInt2(2);
+ bkgdBlue = chunk.getInt2(4);
+
+ int[] bkgdRGB = new int[3];
+ bkgdRGB[0] = bkgdRed;
+ bkgdRGB[1] = bkgdGreen;
+ bkgdRGB[2] = bkgdBlue;
+ if (encodeParam != null) {
+ ((PNGEncodeParam.RGB)encodeParam).
+ setBackgroundRGB(bkgdRGB);
+ }
+ break;
+ }
+
+ int r = 0, g = 0, b = 0;
+ if (bitDepth < 8) {
+ r = expandBits[bitDepth][bkgdRed];
+ g = expandBits[bitDepth][bkgdGreen];
+ b = expandBits[bitDepth][bkgdBlue];
+ } else if (bitDepth == 8) {
+ r = bkgdRed;
+ g = bkgdGreen;
+ b = bkgdBlue;
+ } else if (bitDepth == 16) {
+ r = bkgdRed >> 8;
+ g = bkgdGreen >> 8;
+ b = bkgdBlue >> 8;
+ }
+ if (emitProperties) {
+ properties.put("background_color", new Color(r, g, b));
+ }
+ }
+
+ private void parse_cHRM_chunk(PNGChunk chunk) {
+ // If an sRGB chunk exists, ignore cHRM chunks
+ if (sRGBRenderingIntent != -1) {
+ return;
+ }
+
+ chromaticity = new float[8];
+ chromaticity[0] = chunk.getInt4(0)/100000.0F;
+ chromaticity[1] = chunk.getInt4(4)/100000.0F;
+ chromaticity[2] = chunk.getInt4(8)/100000.0F;
+ chromaticity[3] = chunk.getInt4(12)/100000.0F;
+ chromaticity[4] = chunk.getInt4(16)/100000.0F;
+ chromaticity[5] = chunk.getInt4(20)/100000.0F;
+ chromaticity[6] = chunk.getInt4(24)/100000.0F;
+ chromaticity[7] = chunk.getInt4(28)/100000.0F;
+
+ if (encodeParam != null) {
+ encodeParam.setChromaticity(chromaticity);
+ }
+ if (emitProperties) {
+ properties.put("white_point_x", new Float(chromaticity[0]));
+ properties.put("white_point_y", new Float(chromaticity[1]));
+ properties.put("red_x", new Float(chromaticity[2]));
+ properties.put("red_y", new Float(chromaticity[3]));
+ properties.put("green_x", new Float(chromaticity[4]));
+ properties.put("green_y", new Float(chromaticity[5]));
+ properties.put("blue_x", new Float(chromaticity[6]));
+ properties.put("blue_y", new Float(chromaticity[7]));
+ }
+ }
+
+ private void parse_gAMA_chunk(PNGChunk chunk) {
+ // If an sRGB chunk exists, ignore gAMA chunks
+ if (sRGBRenderingIntent != -1) {
+ return;
+ }
+
+ fileGamma = chunk.getInt4(0)/100000.0F;
+
+ float exp =
+ performGammaCorrection ? displayExponent/userExponent : 1.0F;
+ if (encodeParam != null) {
+ encodeParam.setGamma(fileGamma*exp);
+ }
+ if (emitProperties) {
+ properties.put("gamma", new Float(fileGamma*exp));
+ }
+ }
+
+ private void parse_hIST_chunk(PNGChunk chunk) {
+ if (redPalette == null) {
+ String msg = PropertyUtil.getString("PNGImageDecoder18");
+ throw new RuntimeException(msg);
+ }
+
+ int length = redPalette.length;
+ int[] hist = new int[length];
+ for (int i = 0; i < length; i++) {
+ hist[i] = chunk.getInt2(2*i);
+ }
+
+ if (encodeParam != null) {
+ encodeParam.setPaletteHistogram(hist);
+ }
+ }
+
+ private void parse_iCCP_chunk(PNGChunk chunk) {
+ String name = ""; // todo simplify this
+ byte b;
+
+ int textIndex = 0;
+ while ((b = chunk.getByte(textIndex++)) != 0) {
+ name += (char)b;
+ }
+ }
+
+ private void parse_pHYs_chunk(PNGChunk chunk) {
+ int xPixelsPerUnit = chunk.getInt4(0);
+ int yPixelsPerUnit = chunk.getInt4(4);
+ int unitSpecifier = chunk.getInt1(8);
+
+ if (encodeParam != null) {
+ encodeParam.setPhysicalDimension(xPixelsPerUnit,
+ yPixelsPerUnit,
+ unitSpecifier);
+ }
+ if (emitProperties) {
+ properties.put("x_pixels_per_unit", new Integer(xPixelsPerUnit));
+ properties.put("y_pixels_per_unit", new Integer(yPixelsPerUnit));
+ properties.put("pixel_aspect_ratio",
+ new Float((float)xPixelsPerUnit/yPixelsPerUnit));
+ if (unitSpecifier == 1) {
+ properties.put("pixel_units", "Meters");
+ } else if (unitSpecifier != 0) {
+ // Error -- unit specifier must be 0 or 1
+ String msg = PropertyUtil.getString("PNGImageDecoder12");
+ throw new RuntimeException(msg);
+ }
+ }
+ }
+
+ private void parse_sBIT_chunk(PNGChunk chunk) {
+ if (colorType == PNG_COLOR_PALETTE) {
+ significantBits = new int[3];
+ } else {
+ significantBits = new int[inputBands];
+ }
+ for (int i = 0; i < significantBits.length; i++) {
+ int bits = chunk.getByte(i);
+ int depth = (colorType == PNG_COLOR_PALETTE) ? 8 : bitDepth;
+ if (bits <= 0 || bits > depth) {
+ // Error -- significant bits must be between 0 and
+ // image bit depth.
+ String msg = PropertyUtil.getString("PNGImageDecoder13");
+ throw new RuntimeException(msg);
+ }
+ significantBits[i] = bits;
+ }
+
+ if (encodeParam != null) {
+ encodeParam.setSignificantBits(significantBits);
+ }
+ if (emitProperties) {
+ properties.put("significant_bits", significantBits);
+ }
+ }
+
+ private void parse_sRGB_chunk(PNGChunk chunk) {
+ sRGBRenderingIntent = chunk.getByte(0);
+
+ // The presence of an sRGB chunk implies particular
+ // settings for gamma and chroma.
+ fileGamma = 45455/100000.0F;
+
+ chromaticity = new float[8];
+ chromaticity[0] = 31270/10000.0F;
+ chromaticity[1] = 32900/10000.0F;
+ chromaticity[2] = 64000/10000.0F;
+ chromaticity[3] = 33000/10000.0F;
+ chromaticity[4] = 30000/10000.0F;
+ chromaticity[5] = 60000/10000.0F;
+ chromaticity[6] = 15000/10000.0F;
+ chromaticity[7] = 6000/10000.0F;
+
+ if (performGammaCorrection) {
+ // File gamma is 1/2.2
+ float gamma = fileGamma*(displayExponent/userExponent);
+ if (encodeParam != null) {
+ encodeParam.setGamma(gamma);
+ encodeParam.setChromaticity(chromaticity);
+ }
+ if (emitProperties) {
+ properties.put("gamma", new Float(gamma));
+ properties.put("white_point_x", new Float(chromaticity[0]));
+ properties.put("white_point_y", new Float(chromaticity[1]));
+ properties.put("red_x", new Float(chromaticity[2]));
+ properties.put("red_y", new Float(chromaticity[3]));
+ properties.put("green_x", new Float(chromaticity[4]));
+ properties.put("green_y", new Float(chromaticity[5]));
+ properties.put("blue_x", new Float(chromaticity[6]));
+ properties.put("blue_y", new Float(chromaticity[7]));
+ }
+ }
+ }
+
+ private void parse_tEXt_chunk(PNGChunk chunk) {
+
+ byte b;
+ StringBuffer key = new StringBuffer();
+ int textIndex = 0;
+ while ((b = chunk.getByte(textIndex++)) != 0) {
+ key.append( (char)b );
+ }
+
+ StringBuffer value= new StringBuffer();
+ for (int i = textIndex; i < chunk.getLength(); i++) {
+ value.append( (char)chunk.getByte(i) );
+ }
+
+ textKeys.add(key.toString() );
+ textStrings.add(value.toString() );
+ }
+
+ private void parse_tIME_chunk(PNGChunk chunk) {
+ int year = chunk.getInt2(0);
+ int month = chunk.getInt1(2) - 1;
+ int day = chunk.getInt1(3);
+ int hour = chunk.getInt1(4);
+ int minute = chunk.getInt1(5);
+ int second = chunk.getInt1(6);
+
+ TimeZone gmt = TimeZone.getTimeZone("GMT");
+
+ GregorianCalendar cal = new GregorianCalendar(gmt);
+ cal.set(year, month, day,
+ hour, minute, second);
+ Date date = cal.getTime();
+
+ if (encodeParam != null) {
+ encodeParam.setModificationTime(date);
+ }
+ if (emitProperties) {
+ properties.put("timestamp", date);
+ }
+ }
+
+ private void parse_tRNS_chunk(PNGChunk chunk) {
+ if (colorType == PNG_COLOR_PALETTE) {
+ int entries = chunk.getLength();
+ if (entries > paletteEntries) {
+ // Error -- mustn't have more alpha than RGB palette entries
+ String msg = PropertyUtil.getString("PNGImageDecoder14");
+ throw new RuntimeException(msg);
+ }
+
+ // Load beginning of palette from the chunk
+ alphaPalette = new byte[paletteEntries];
+ for (int i = 0; i < entries; i++) {
+ alphaPalette[i] = chunk.getByte(i);
+ }
+
+ // Fill rest of palette with 255
+ for (int i = entries; i < paletteEntries; i++) {
+ alphaPalette[i] = (byte)255;
+ }
+
+ if (!suppressAlpha) {
+ if (expandPalette) {
+ postProcess = POST_PALETTE_TO_RGBA;
+ outputBands = 4;
+ } else {
+ outputHasAlphaPalette = true;
+ }
+ }
+ } else if (colorType == PNG_COLOR_GRAY) {
+ grayTransparentAlpha = chunk.getInt2(0);
+
+ if (!suppressAlpha) {
+ if (bitDepth < 8) {
+ output8BitGray = true;
+ maxOpacity = 255;
+ postProcess = POST_GRAY_LUT_ADD_TRANS;
+ } else {
+ postProcess = POST_ADD_GRAY_TRANS;
+ }
+
+ if (expandGrayAlpha) {
+ outputBands = 4;
+ postProcess |= POST_EXP_MASK;
+ } else {
+ outputBands = 2;
+ }
+
+ if (encodeParam != null) {
+ ((PNGEncodeParam.Gray)encodeParam).
+ setTransparentGray(grayTransparentAlpha);
+ }
+ }
+ } else if (colorType == PNG_COLOR_RGB) {
+ redTransparentAlpha = chunk.getInt2(0);
+ greenTransparentAlpha = chunk.getInt2(2);
+ blueTransparentAlpha = chunk.getInt2(4);
+
+ if (!suppressAlpha) {
+ outputBands = 4;
+ postProcess = POST_ADD_RGB_TRANS;
+
+ if (encodeParam != null) {
+ int[] rgbTrans = new int[3];
+ rgbTrans[0] = redTransparentAlpha;
+ rgbTrans[1] = greenTransparentAlpha;
+ rgbTrans[2] = blueTransparentAlpha;
+ ((PNGEncodeParam.RGB)encodeParam).
+ setTransparentRGB(rgbTrans);
+ }
+ }
+ } else if (colorType == PNG_COLOR_GRAY_ALPHA ||
+ colorType == PNG_COLOR_RGB_ALPHA) {
+ // Error -- GA or RGBA image can't have a tRNS chunk.
+ String msg = PropertyUtil.getString("PNGImageDecoder15");
+ throw new RuntimeException(msg);
+ }
+ }
+
+ private void parse_zTXt_chunk(PNGChunk chunk) {
+
+ int textIndex = 0;
+ StringBuffer key = new StringBuffer();
+ byte b;
+ while ((b = chunk.getByte(textIndex++)) != 0) {
+ key.append( (char)b );
+ }
+ /* int method = */ chunk.getByte(textIndex++);
+
+ StringBuffer value = new StringBuffer();
+ try {
+ int length = chunk.getLength() - textIndex;
+ byte[] data = chunk.getData();
+ InputStream cis =
+ new ByteArrayInputStream(data, textIndex, length);
+ InputStream iis = new InflaterInputStream(cis);
+
+ int c;
+ while ((c = iis.read()) != -1) {
+ value.append( (char)c );
+ }
+
+ ztextKeys.add(key.toString() );
+ ztextStrings.add(value.toString() );
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
+
+ private WritableRaster createRaster(int width, int height, int bands,
+ int scanlineStride,
+ int bitDepth) {
+
+ DataBuffer dataBuffer;
+ WritableRaster ras = null;
+ Point origin = new Point(0, 0);
+ if ((bitDepth < 8) && (bands == 1)) {
+ dataBuffer = new DataBufferByte(height*scanlineStride);
+ ras = Raster.createPackedRaster(dataBuffer,
+ width, height,
+ bitDepth,
+ origin);
+ } else if (bitDepth <= 8) {
+ dataBuffer = new DataBufferByte(height*scanlineStride);
+ ras = Raster.createInterleavedRaster(dataBuffer,
+ width, height,
+ scanlineStride,
+ bands,
+ bandOffsets[bands],
+ origin);
+ } else {
+ dataBuffer = new DataBufferUShort(height*scanlineStride);
+ ras = Raster.createInterleavedRaster(dataBuffer,
+ width, height,
+ scanlineStride,
+ bands,
+ bandOffsets[bands],
+ origin);
+ }
+
+ return ras;
+ }
+
+ // Data filtering methods
+
+ private static void decodeSubFilter(byte[] curr, int count, int bpp) {
+ for (int i = bpp; i < count; i++) {
+ int val;
+
+ val = curr[i] & 0xff;
+ val += curr[i - bpp] & 0xff;
+
+ curr[i] = (byte)val;
+ }
+ }
+
+ private static void decodeUpFilter(byte[] curr, byte[] prev,
+ int count) {
+ for (int i = 0; i < count; i++) {
+ int raw = curr[i] & 0xff;
+ int prior = prev[i] & 0xff;
+
+ curr[i] = (byte)(raw + prior);
+ }
+ }
+
+ private static void decodeAverageFilter(byte[] curr, byte[] prev,
+ int count, int bpp) {
+ int raw, priorPixel, priorRow;
+
+ for (int i = 0; i < bpp; i++) {
+ raw = curr[i] & 0xff;
+ priorRow = prev[i] & 0xff;
+
+ curr[i] = (byte)(raw + priorRow/2);
+ }
+
+ for (int i = bpp; i < count; i++) {
+ raw = curr[i] & 0xff;
+ priorPixel = curr[i - bpp] & 0xff;
+ priorRow = prev[i] & 0xff;
+
+ curr[i] = (byte)(raw + (priorPixel + priorRow)/2);
+ }
+ }
+
+ private static void decodePaethFilter(byte[] curr, byte[] prev,
+ int count, int bpp) {
+ int raw, priorPixel, priorRow, priorRowPixel;
+
+ for (int i = 0; i < bpp; i++) {
+ raw = curr[i] & 0xff;
+ priorRow = prev[i] & 0xff;
+
+ curr[i] = (byte)(raw + priorRow);
+ }
+
+ for (int i = bpp; i < count; i++) {
+ raw = curr[i] & 0xff;
+ priorPixel = curr[i - bpp] & 0xff;
+ priorRow = prev[i] & 0xff;
+ priorRowPixel = prev[i - bpp] & 0xff;
+
+ curr[i] = (byte)(raw + PNGEncodeParam.paethPredictor(priorPixel,
+ priorRow,
+ priorRowPixel));
+ }
+ }
+
+ private void processPixels(int process,
+ Raster src, WritableRaster dst,
+ int xOffset, int step, int y, int width) {
+ int srcX, dstX;
+
+ // Create an array suitable for holding one pixel
+ int[] ps = src.getPixel(0, 0, (int[])null);
+ int[] pd = dst.getPixel(0, 0, (int[])null);
+
+ dstX = xOffset;
+ switch (process) {
+ case POST_NONE:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+ dst.setPixel(dstX, y, ps);
+ dstX += step;
+ }
+ break;
+
+ case POST_GAMMA:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ for (int i = 0; i < inputBands; i++) {
+ int x = ps[i];
+ ps[i] = gammaLut[x];
+ }
+
+ dst.setPixel(dstX, y, ps);
+ dstX += step;
+ }
+ break;
+
+ case POST_GRAY_LUT:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ pd[0] = grayLut[ps[0]];
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_GRAY_LUT_ADD_TRANS:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ pd[0] = grayLut[val];
+ if (val == grayTransparentAlpha) {
+ pd[1] = 0;
+ } else {
+ pd[1] = maxOpacity;
+ }
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_PALETTE_TO_RGB:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ pd[0] = redPalette[val];
+ pd[1] = greenPalette[val];
+ pd[2] = bluePalette[val];
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_PALETTE_TO_RGBA:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ pd[0] = redPalette[val];
+ pd[1] = greenPalette[val];
+ pd[2] = bluePalette[val];
+ pd[3] = alphaPalette[val];
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_ADD_GRAY_TRANS:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ if (performGammaCorrection) {
+ val = gammaLut[val];
+ }
+ pd[0] = val;
+ if (val == grayTransparentAlpha) {
+ pd[1] = 0;
+ } else {
+ pd[1] = maxOpacity;
+ }
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_ADD_RGB_TRANS:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int r = ps[0];
+ int g = ps[1];
+ int b = ps[2];
+ if (performGammaCorrection) {
+ pd[0] = gammaLut[r];
+ pd[1] = gammaLut[g];
+ pd[2] = gammaLut[b];
+ } else {
+ pd[0] = r;
+ pd[1] = g;
+ pd[2] = b;
+ }
+ if ((r == redTransparentAlpha) &&
+ (g == greenTransparentAlpha) &&
+ (b == blueTransparentAlpha)) {
+ pd[3] = 0;
+ } else {
+ pd[3] = maxOpacity;
+ }
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_REMOVE_GRAY_TRANS:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int g = ps[0];
+ if (performGammaCorrection) {
+ pd[0] = gammaLut[g];
+ } else {
+ pd[0] = g;
+ }
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_REMOVE_RGB_TRANS:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int r = ps[0];
+ int g = ps[1];
+ int b = ps[2];
+ if (performGammaCorrection) {
+ pd[0] = gammaLut[r];
+ pd[1] = gammaLut[g];
+ pd[2] = gammaLut[b];
+ } else {
+ pd[0] = r;
+ pd[1] = g;
+ pd[2] = b;
+ }
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_GAMMA_EXP:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ int alpha = ps[1];
+ int gamma = gammaLut[val];
+ pd[0] = gamma;
+ pd[1] = gamma;
+ pd[2] = gamma;
+ pd[3] = alpha;
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_GRAY_ALPHA_EXP:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ int alpha = ps[1];
+ pd[0] = val;
+ pd[1] = val;
+ pd[2] = val;
+ pd[3] = alpha;
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_ADD_GRAY_TRANS_EXP:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ if (performGammaCorrection) {
+ val = gammaLut[val];
+ }
+ pd[0] = val;
+ pd[1] = val;
+ pd[2] = val;
+ if (val == grayTransparentAlpha) {
+ pd[3] = 0;
+ } else {
+ pd[3] = maxOpacity;
+ }
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+
+ case POST_GRAY_LUT_ADD_TRANS_EXP:
+ for (srcX = 0; srcX < width; srcX++) {
+ src.getPixel(srcX, 0, ps);
+
+ int val = ps[0];
+ int val2 = grayLut[val];
+ pd[0] = val2;
+ pd[1] = val2;
+ pd[2] = val2;
+ if (val == grayTransparentAlpha) {
+ pd[3] = 0;
+ } else {
+ pd[3] = maxOpacity;
+ }
+
+ dst.setPixel(dstX, y, pd);
+ dstX += step;
+ }
+ break;
+ }
+ }
+
+ /**
+ * Reads in an image of a given size and returns it as a
+ * WritableRaster.
+ */
+ private void decodePass(WritableRaster imRas,
+ int xOffset, int yOffset,
+ int xStep, int yStep,
+ int passWidth, int passHeight) {
+ if ((passWidth == 0) || (passHeight == 0)) {
+ return;
+ }
+
+ int bytesPerRow = (inputBands*passWidth*bitDepth + 7)/8;
+ int eltsPerRow = (bitDepth == 16) ? bytesPerRow/2 : bytesPerRow;
+ byte[] curr = new byte[bytesPerRow];
+ byte[] prior = new byte[bytesPerRow];
+
+ // Create a 1-row tall Raster to hold the data
+ WritableRaster passRow =
+ createRaster(passWidth, 1, inputBands,
+ eltsPerRow,
+ bitDepth);
+ DataBuffer dataBuffer = passRow.getDataBuffer();
+ int type = dataBuffer.getDataType();
+ byte[] byteData = null;
+ short[] shortData = null;
+ if (type == DataBuffer.TYPE_BYTE) {
+ byteData = ((DataBufferByte)dataBuffer).getData();
+ } else {
+ shortData = ((DataBufferUShort)dataBuffer).getData();
+ }
+
+ // Decode the (sub)image row-by-row
+ int srcY, dstY;
+ for (srcY = 0, dstY = yOffset;
+ srcY < passHeight;
+ srcY++, dstY += yStep) {
+ // Read the filter type byte and a row of data
+ int filter = 0;
+ try {
+ filter = dataStream.read();
+ dataStream.readFully(curr, 0, bytesPerRow);
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+
+ switch (filter) {
+ case PNG_FILTER_NONE:
+ break;
+ case PNG_FILTER_SUB:
+ decodeSubFilter(curr, bytesPerRow, bytesPerPixel);
+ break;
+ case PNG_FILTER_UP:
+ decodeUpFilter(curr, prior, bytesPerRow);
+ break;
+ case PNG_FILTER_AVERAGE:
+ decodeAverageFilter(curr, prior, bytesPerRow, bytesPerPixel);
+ break;
+ case PNG_FILTER_PAETH:
+ decodePaethFilter(curr, prior, bytesPerRow, bytesPerPixel);
+ break;
+ default:
+ // Error -- uknown filter type
+ String msg = PropertyUtil.getString("PNGImageDecoder16");
+ throw new RuntimeException(msg);
+ }
+
+ // Copy data into passRow byte by byte
+ if (bitDepth < 16) {
+ System.arraycopy(curr, 0, byteData, 0, bytesPerRow);
+ } else {
+ int idx = 0;
+ for (int j = 0; j < eltsPerRow; j++) {
+ shortData[j] =
+ (short)((curr[idx] << 8) | (curr[idx + 1] & 0xff));
+ idx += 2;
+ }
+ }
+
+ processPixels(postProcess,
+ passRow, imRas, xOffset, xStep, dstY, passWidth);
+
+ // Swap curr and prior
+ byte[] tmp = prior;
+ prior = curr;
+ curr = tmp;
+ }
+ }
+
+ private void decodeImage(boolean useInterlacing) {
+ if (!useInterlacing) {
+ decodePass(theTile, 0, 0, 1, 1, width, height);
+ } else {
+ decodePass(theTile, 0, 0, 8, 8, (width + 7)/8, (height + 7)/8);
+ decodePass(theTile, 4, 0, 8, 8, (width + 3)/8, (height + 7)/8);
+ decodePass(theTile, 0, 4, 4, 8, (width + 3)/4, (height + 3)/8);
+ decodePass(theTile, 2, 0, 4, 4, (width + 1)/4, (height + 3)/4);
+ decodePass(theTile, 0, 2, 2, 4, (width + 1)/2, (height + 1)/4);
+ decodePass(theTile, 1, 0, 2, 2, width/2, (height + 1)/2);
+ decodePass(theTile, 0, 1, 1, 2, width, height/2);
+ }
+ }
+
+ // RenderedImage stuff
+
+ public Raster getTile(int tileX, int tileY) {
+ if (tileX != 0 || tileY != 0) {
+ // Error -- bad tile requested
+ String msg = PropertyUtil.getString("PNGImageDecoder17");
+ throw new IllegalArgumentException(msg);
+ }
+ return theTile;
+ }
+}
Propchange: incubator/flex/sdk/branches/develop/modules/thirdparty/batik/sources/org/apache/flex/forks/batik/ext/awt/image/codec/png/PNGImageDecoder.java
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