--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/classes/com/sun/imageio/plugins/common/ImageUtil.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,1165 @@
+/*
+ * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.imageio.plugins.common;
+
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Transparency;
+import java.awt.color.ColorSpace;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.ComponentColorModel;
+import java.awt.image.ComponentSampleModel;
+import java.awt.image.DataBuffer;
+import java.awt.image.DataBufferByte;
+import java.awt.image.DataBufferInt;
+import java.awt.image.DataBufferShort;
+import java.awt.image.DataBufferUShort;
+import java.awt.image.DirectColorModel;
+import java.awt.image.IndexColorModel;
+import java.awt.image.MultiPixelPackedSampleModel;
+import java.awt.image.Raster;
+import java.awt.image.RenderedImage;
+import java.awt.image.SampleModel;
+import java.awt.image.SinglePixelPackedSampleModel;
+import java.awt.image.WritableRaster;
+import java.util.Arrays;
+
+//import javax.imageio.ImageTypeSpecifier;
+
+import javax.imageio.IIOException;
+import javax.imageio.IIOImage;
+import javax.imageio.ImageTypeSpecifier;
+import javax.imageio.ImageWriter;
+import javax.imageio.spi.ImageWriterSpi;
+
+public class ImageUtil {
+ /* XXX testing only
+ public static void main(String[] args) {
+ ImageTypeSpecifier bilevel =
+ ImageTypeSpecifier.createIndexed(new byte[] {(byte)0, (byte)255},
+ new byte[] {(byte)0, (byte)255},
+ new byte[] {(byte)0, (byte)255},
+ null, 1,
+ DataBuffer.TYPE_BYTE);
+ ImageTypeSpecifier gray =
+ ImageTypeSpecifier.createGrayscale(8, DataBuffer.TYPE_BYTE, false);
+ ImageTypeSpecifier grayAlpha =
+ ImageTypeSpecifier.createGrayscale(8, DataBuffer.TYPE_BYTE, false,
+ false);
+ ImageTypeSpecifier rgb =
+ ImageTypeSpecifier.createInterleaved(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ new int[] {0, 1, 2},
+ DataBuffer.TYPE_BYTE,
+ false,
+ false);
+ ImageTypeSpecifier rgba =
+ ImageTypeSpecifier.createInterleaved(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ new int[] {0, 1, 2, 3},
+ DataBuffer.TYPE_BYTE,
+ true,
+ false);
+ ImageTypeSpecifier packed =
+ ImageTypeSpecifier.createPacked(ColorSpace.getInstance(ColorSpace.CS_sRGB),
+ 0xff000000,
+ 0x00ff0000,
+ 0x0000ff00,
+ 0x000000ff,
+ DataBuffer.TYPE_BYTE,
+ false);
+
+ SampleModel bandedSM =
+ new java.awt.image.BandedSampleModel(DataBuffer.TYPE_BYTE,
+ 1, 1, 15);
+
+ System.out.println(createColorModel(bilevel.getSampleModel()));
+ System.out.println(createColorModel(gray.getSampleModel()));
+ System.out.println(createColorModel(grayAlpha.getSampleModel()));
+ System.out.println(createColorModel(rgb.getSampleModel()));
+ System.out.println(createColorModel(rgba.getSampleModel()));
+ System.out.println(createColorModel(packed.getSampleModel()));
+ System.out.println(createColorModel(bandedSM));
+ }
+ */
+
+ /**
+ * Creates a <code>ColorModel</code> that may be used with the
+ * specified <code>SampleModel</code>. If a suitable
+ * <code>ColorModel</code> cannot be found, this method returns
+ * <code>null</code>.
+ *
+ * <p> Suitable <code>ColorModel</code>s are guaranteed to exist
+ * for all instances of <code>ComponentSampleModel</code>.
+ * For 1- and 3- banded <code>SampleModel</code>s, the returned
+ * <code>ColorModel</code> will be opaque. For 2- and 4-banded
+ * <code>SampleModel</code>s, the output will use alpha transparency
+ * which is not premultiplied. 1- and 2-banded data will use a
+ * grayscale <code>ColorSpace</code>, and 3- and 4-banded data a sRGB
+ * <code>ColorSpace</code>. Data with 5 or more bands will have a
+ * <code>BogusColorSpace</code>.</p>
+ *
+ * <p>An instance of <code>DirectColorModel</code> will be created for
+ * instances of <code>SinglePixelPackedSampleModel</code> with no more
+ * than 4 bands.</p>
+ *
+ * <p>An instance of <code>IndexColorModel</code> will be created for
+ * instances of <code>MultiPixelPackedSampleModel</code>. The colormap
+ * will be a grayscale ramp with <code>1 << numberOfBits</code>
+ * entries ranging from zero to at most 255.</p>
+ *
+ * @return An instance of <code>ColorModel</code> that is suitable for
+ * the supplied <code>SampleModel</code>, or <code>null</code>.
+ *
+ * @throws IllegalArgumentException If <code>sampleModel</code> is
+ * <code>null</code>.
+ */
+ public static final ColorModel createColorModel(SampleModel sampleModel) {
+ // Check the parameter.
+ if(sampleModel == null) {
+ throw new IllegalArgumentException("sampleModel == null!");
+ }
+
+ // Get the data type.
+ int dataType = sampleModel.getDataType();
+
+ // Check the data type
+ switch(dataType) {
+ case DataBuffer.TYPE_BYTE:
+ case DataBuffer.TYPE_USHORT:
+ case DataBuffer.TYPE_SHORT:
+ case DataBuffer.TYPE_INT:
+ case DataBuffer.TYPE_FLOAT:
+ case DataBuffer.TYPE_DOUBLE:
+ break;
+ default:
+ // Return null for other types.
+ return null;
+ }
+
+ // The return variable.
+ ColorModel colorModel = null;
+
+ // Get the sample size.
+ int[] sampleSize = sampleModel.getSampleSize();
+
+ // Create a Component ColorModel.
+ if(sampleModel instanceof ComponentSampleModel) {
+ // Get the number of bands.
+ int numBands = sampleModel.getNumBands();
+
+ // Determine the color space.
+ ColorSpace colorSpace = null;
+ if(numBands <= 2) {
+ colorSpace = ColorSpace.getInstance(ColorSpace.CS_GRAY);
+ } else if(numBands <= 4) {
+ colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
+ } else {
+ colorSpace = new BogusColorSpace(numBands);
+ }
+
+ boolean hasAlpha = (numBands == 2) || (numBands == 4);
+ boolean isAlphaPremultiplied = false;
+ int transparency = hasAlpha ?
+ Transparency.TRANSLUCENT : Transparency.OPAQUE;
+
+ colorModel = new ComponentColorModel(colorSpace,
+ sampleSize,
+ hasAlpha,
+ isAlphaPremultiplied,
+ transparency,
+ dataType);
+ } else if (sampleModel.getNumBands() <= 4 &&
+ sampleModel instanceof SinglePixelPackedSampleModel) {
+ SinglePixelPackedSampleModel sppsm =
+ (SinglePixelPackedSampleModel)sampleModel;
+
+ int[] bitMasks = sppsm.getBitMasks();
+ int rmask = 0;
+ int gmask = 0;
+ int bmask = 0;
+ int amask = 0;
+
+ int numBands = bitMasks.length;
+ if (numBands <= 2) {
+ rmask = gmask = bmask = bitMasks[0];
+ if (numBands == 2) {
+ amask = bitMasks[1];
+ }
+ } else {
+ rmask = bitMasks[0];
+ gmask = bitMasks[1];
+ bmask = bitMasks[2];
+ if (numBands == 4) {
+ amask = bitMasks[3];
+ }
+ }
+
+ int bits = 0;
+ for (int i = 0; i < sampleSize.length; i++) {
+ bits += sampleSize[i];
+ }
+
+ return new DirectColorModel(bits, rmask, gmask, bmask, amask);
+
+ } else if(sampleModel instanceof MultiPixelPackedSampleModel) {
+ // Load the colormap with a ramp.
+ int bitsPerSample = sampleSize[0];
+ int numEntries = 1 << bitsPerSample;
+ byte[] map = new byte[numEntries];
+ for (int i = 0; i < numEntries; i++) {
+ map[i] = (byte)(i*255/(numEntries - 1));
+ }
+
+ colorModel = new IndexColorModel(bitsPerSample, numEntries,
+ map, map, map);
+
+ }
+
+ return colorModel;
+ }
+
+ /**
+ * For the case of binary data (<code>isBinary()</code> returns
+ * <code>true</code>), return the binary data as a packed byte array.
+ * The data will be packed as eight bits per byte with no bit offset,
+ * i.e., the first bit in each image line will be the left-most of the
+ * first byte of the line. The line stride in bytes will be
+ * <code>(int)((getWidth()+7)/8)</code>. The length of the returned
+ * array will be the line stride multiplied by <code>getHeight()</code>
+ *
+ * @return the binary data as a packed array of bytes with zero offset
+ * of <code>null</code> if the data are not binary.
+ * @throws IllegalArgumentException if <code>isBinary()</code> returns
+ * <code>false</code> with the <code>SampleModel</code> of the
+ * supplied <code>Raster</code> as argument.
+ */
+ public static byte[] getPackedBinaryData(Raster raster,
+ Rectangle rect) {
+ SampleModel sm = raster.getSampleModel();
+ if(!isBinary(sm)) {
+ throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
+ }
+
+ int rectX = rect.x;
+ int rectY = rect.y;
+ int rectWidth = rect.width;
+ int rectHeight = rect.height;
+
+ DataBuffer dataBuffer = raster.getDataBuffer();
+
+ int dx = rectX - raster.getSampleModelTranslateX();
+ int dy = rectY - raster.getSampleModelTranslateY();
+
+ MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
+ int lineStride = mpp.getScanlineStride();
+ int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
+ int bitOffset = mpp.getBitOffset(dx);
+
+ int numBytesPerRow = (rectWidth + 7)/8;
+ if(dataBuffer instanceof DataBufferByte &&
+ eltOffset == 0 && bitOffset == 0 &&
+ numBytesPerRow == lineStride &&
+ ((DataBufferByte)dataBuffer).getData().length ==
+ numBytesPerRow*rectHeight) {
+ return ((DataBufferByte)dataBuffer).getData();
+ }
+
+ byte[] binaryDataArray = new byte[numBytesPerRow*rectHeight];
+
+ int b = 0;
+
+ if(bitOffset == 0) {
+ if(dataBuffer instanceof DataBufferByte) {
+ byte[] data = ((DataBufferByte)dataBuffer).getData();
+ int stride = numBytesPerRow;
+ int offset = 0;
+ for(int y = 0; y < rectHeight; y++) {
+ System.arraycopy(data, eltOffset,
+ binaryDataArray, offset,
+ stride);
+ offset += stride;
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferShort ||
+ dataBuffer instanceof DataBufferUShort) {
+ short[] data = dataBuffer instanceof DataBufferShort ?
+ ((DataBufferShort)dataBuffer).getData() :
+ ((DataBufferUShort)dataBuffer).getData();
+
+ for(int y = 0; y < rectHeight; y++) {
+ int xRemaining = rectWidth;
+ int i = eltOffset;
+ while(xRemaining > 8) {
+ short datum = data[i++];
+ binaryDataArray[b++] = (byte)((datum >>> 8) & 0xFF);
+ binaryDataArray[b++] = (byte)(datum & 0xFF);
+ xRemaining -= 16;
+ }
+ if(xRemaining > 0) {
+ binaryDataArray[b++] = (byte)((data[i] >>> 8) & 0XFF);
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferInt) {
+ int[] data = ((DataBufferInt)dataBuffer).getData();
+
+ for(int y = 0; y < rectHeight; y++) {
+ int xRemaining = rectWidth;
+ int i = eltOffset;
+ while(xRemaining > 24) {
+ int datum = data[i++];
+ binaryDataArray[b++] = (byte)((datum >>> 24) & 0xFF);
+ binaryDataArray[b++] = (byte)((datum >>> 16) & 0xFF);
+ binaryDataArray[b++] = (byte)((datum >>> 8) & 0xFF);
+ binaryDataArray[b++] = (byte)(datum & 0xFF);
+ xRemaining -= 32;
+ }
+ int shift = 24;
+ while(xRemaining > 0) {
+ binaryDataArray[b++] =
+ (byte)((data[i] >>> shift) & 0xFF);
+ shift -= 8;
+ xRemaining -= 8;
+ }
+ eltOffset += lineStride;
+ }
+ }
+ } else { // bitOffset != 0
+ if(dataBuffer instanceof DataBufferByte) {
+ byte[] data = ((DataBufferByte)dataBuffer).getData();
+
+ if((bitOffset & 7) == 0) {
+ int stride = numBytesPerRow;
+ int offset = 0;
+ for(int y = 0; y < rectHeight; y++) {
+ System.arraycopy(data, eltOffset,
+ binaryDataArray, offset,
+ stride);
+ offset += stride;
+ eltOffset += lineStride;
+ }
+ } else { // bitOffset % 8 != 0
+ int leftShift = bitOffset & 7;
+ int rightShift = 8 - leftShift;
+ for(int y = 0; y < rectHeight; y++) {
+ int i = eltOffset;
+ int xRemaining = rectWidth;
+ while(xRemaining > 0) {
+ if(xRemaining > rightShift) {
+ binaryDataArray[b++] =
+ (byte)(((data[i++]&0xFF) << leftShift) |
+ ((data[i]&0xFF) >>> rightShift));
+ } else {
+ binaryDataArray[b++] =
+ (byte)((data[i]&0xFF) << leftShift);
+ }
+ xRemaining -= 8;
+ }
+ eltOffset += lineStride;
+ }
+ }
+ } else if(dataBuffer instanceof DataBufferShort ||
+ dataBuffer instanceof DataBufferUShort) {
+ short[] data = dataBuffer instanceof DataBufferShort ?
+ ((DataBufferShort)dataBuffer).getData() :
+ ((DataBufferUShort)dataBuffer).getData();
+
+ for(int y = 0; y < rectHeight; y++) {
+ int bOffset = bitOffset;
+ for(int x = 0; x < rectWidth; x += 8, bOffset += 8) {
+ int i = eltOffset + bOffset/16;
+ int mod = bOffset % 16;
+ int left = data[i] & 0xFFFF;
+ if(mod <= 8) {
+ binaryDataArray[b++] = (byte)(left >>> (8 - mod));
+ } else {
+ int delta = mod - 8;
+ int right = data[i+1] & 0xFFFF;
+ binaryDataArray[b++] =
+ (byte)((left << delta) |
+ (right >>> (16 - delta)));
+ }
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferInt) {
+ int[] data = ((DataBufferInt)dataBuffer).getData();
+
+ for(int y = 0; y < rectHeight; y++) {
+ int bOffset = bitOffset;
+ for(int x = 0; x < rectWidth; x += 8, bOffset += 8) {
+ int i = eltOffset + bOffset/32;
+ int mod = bOffset % 32;
+ int left = data[i];
+ if(mod <= 24) {
+ binaryDataArray[b++] =
+ (byte)(left >>> (24 - mod));
+ } else {
+ int delta = mod - 24;
+ int right = data[i+1];
+ binaryDataArray[b++] =
+ (byte)((left << delta) |
+ (right >>> (32 - delta)));
+ }
+ }
+ eltOffset += lineStride;
+ }
+ }
+ }
+
+ return binaryDataArray;
+ }
+
+ /**
+ * Returns the binary data unpacked into an array of bytes.
+ * The line stride will be the width of the <code>Raster</code>.
+ *
+ * @throws IllegalArgumentException if <code>isBinary()</code> returns
+ * <code>false</code> with the <code>SampleModel</code> of the
+ * supplied <code>Raster</code> as argument.
+ */
+ public static byte[] getUnpackedBinaryData(Raster raster,
+ Rectangle rect) {
+ SampleModel sm = raster.getSampleModel();
+ if(!isBinary(sm)) {
+ throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
+ }
+
+ int rectX = rect.x;
+ int rectY = rect.y;
+ int rectWidth = rect.width;
+ int rectHeight = rect.height;
+
+ DataBuffer dataBuffer = raster.getDataBuffer();
+
+ int dx = rectX - raster.getSampleModelTranslateX();
+ int dy = rectY - raster.getSampleModelTranslateY();
+
+ MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
+ int lineStride = mpp.getScanlineStride();
+ int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
+ int bitOffset = mpp.getBitOffset(dx);
+
+ byte[] bdata = new byte[rectWidth*rectHeight];
+ int maxY = rectY + rectHeight;
+ int maxX = rectX + rectWidth;
+ int k = 0;
+
+ if(dataBuffer instanceof DataBufferByte) {
+ byte[] data = ((DataBufferByte)dataBuffer).getData();
+ for(int y = rectY; y < maxY; y++) {
+ int bOffset = eltOffset*8 + bitOffset;
+ for(int x = rectX; x < maxX; x++) {
+ byte b = data[bOffset/8];
+ bdata[k++] =
+ (byte)((b >>> (7 - bOffset & 7)) & 0x0000001);
+ bOffset++;
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferShort ||
+ dataBuffer instanceof DataBufferUShort) {
+ short[] data = dataBuffer instanceof DataBufferShort ?
+ ((DataBufferShort)dataBuffer).getData() :
+ ((DataBufferUShort)dataBuffer).getData();
+ for(int y = rectY; y < maxY; y++) {
+ int bOffset = eltOffset*16 + bitOffset;
+ for(int x = rectX; x < maxX; x++) {
+ short s = data[bOffset/16];
+ bdata[k++] =
+ (byte)((s >>> (15 - bOffset % 16)) &
+ 0x0000001);
+ bOffset++;
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferInt) {
+ int[] data = ((DataBufferInt)dataBuffer).getData();
+ for(int y = rectY; y < maxY; y++) {
+ int bOffset = eltOffset*32 + bitOffset;
+ for(int x = rectX; x < maxX; x++) {
+ int i = data[bOffset/32];
+ bdata[k++] =
+ (byte)((i >>> (31 - bOffset % 32)) &
+ 0x0000001);
+ bOffset++;
+ }
+ eltOffset += lineStride;
+ }
+ }
+
+ return bdata;
+ }
+
+ /**
+ * Sets the supplied <code>Raster</code>'s data from an array
+ * of packed binary data of the form returned by
+ * <code>getPackedBinaryData()</code>.
+ *
+ * @throws IllegalArgumentException if <code>isBinary()</code> returns
+ * <code>false</code> with the <code>SampleModel</code> of the
+ * supplied <code>Raster</code> as argument.
+ */
+ public static void setPackedBinaryData(byte[] binaryDataArray,
+ WritableRaster raster,
+ Rectangle rect) {
+ SampleModel sm = raster.getSampleModel();
+ if(!isBinary(sm)) {
+ throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
+ }
+
+ int rectX = rect.x;
+ int rectY = rect.y;
+ int rectWidth = rect.width;
+ int rectHeight = rect.height;
+
+ DataBuffer dataBuffer = raster.getDataBuffer();
+
+ int dx = rectX - raster.getSampleModelTranslateX();
+ int dy = rectY - raster.getSampleModelTranslateY();
+
+ MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
+ int lineStride = mpp.getScanlineStride();
+ int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
+ int bitOffset = mpp.getBitOffset(dx);
+
+ int b = 0;
+
+ if(bitOffset == 0) {
+ if(dataBuffer instanceof DataBufferByte) {
+ byte[] data = ((DataBufferByte)dataBuffer).getData();
+ if(data == binaryDataArray) {
+ // Optimal case: simply return.
+ return;
+ }
+ int stride = (rectWidth + 7)/8;
+ int offset = 0;
+ for(int y = 0; y < rectHeight; y++) {
+ System.arraycopy(binaryDataArray, offset,
+ data, eltOffset,
+ stride);
+ offset += stride;
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferShort ||
+ dataBuffer instanceof DataBufferUShort) {
+ short[] data = dataBuffer instanceof DataBufferShort ?
+ ((DataBufferShort)dataBuffer).getData() :
+ ((DataBufferUShort)dataBuffer).getData();
+
+ for(int y = 0; y < rectHeight; y++) {
+ int xRemaining = rectWidth;
+ int i = eltOffset;
+ while(xRemaining > 8) {
+ data[i++] =
+ (short)(((binaryDataArray[b++] & 0xFF) << 8) |
+ (binaryDataArray[b++] & 0xFF));
+ xRemaining -= 16;
+ }
+ if(xRemaining > 0) {
+ data[i++] =
+ (short)((binaryDataArray[b++] & 0xFF) << 8);
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferInt) {
+ int[] data = ((DataBufferInt)dataBuffer).getData();
+
+ for(int y = 0; y < rectHeight; y++) {
+ int xRemaining = rectWidth;
+ int i = eltOffset;
+ while(xRemaining > 24) {
+ data[i++] =
+ (((binaryDataArray[b++] & 0xFF) << 24) |
+ ((binaryDataArray[b++] & 0xFF) << 16) |
+ ((binaryDataArray[b++] & 0xFF) << 8) |
+ (binaryDataArray[b++] & 0xFF));
+ xRemaining -= 32;
+ }
+ int shift = 24;
+ while(xRemaining > 0) {
+ data[i] |= ((binaryDataArray[b++] & 0xFF) << shift);
+ shift -= 8;
+ xRemaining -= 8;
+ }
+ eltOffset += lineStride;
+ }
+ }
+ } else { // bitOffset != 0
+ int stride = (rectWidth + 7)/8;
+ int offset = 0;
+ if(dataBuffer instanceof DataBufferByte) {
+ byte[] data = ((DataBufferByte)dataBuffer).getData();
+
+ if((bitOffset & 7) == 0) {
+ for(int y = 0; y < rectHeight; y++) {
+ System.arraycopy(binaryDataArray, offset,
+ data, eltOffset,
+ stride);
+ offset += stride;
+ eltOffset += lineStride;
+ }
+ } else { // bitOffset % 8 != 0
+ int rightShift = bitOffset & 7;
+ int leftShift = 8 - rightShift;
+ int leftShift8 = 8 + leftShift;
+ int mask = (byte)(255<<leftShift);
+ int mask1 = (byte)~mask;
+
+ for(int y = 0; y < rectHeight; y++) {
+ int i = eltOffset;
+ int xRemaining = rectWidth;
+ while(xRemaining > 0) {
+ byte datum = binaryDataArray[b++];
+
+ if (xRemaining > leftShift8) {
+ // when all the bits in this BYTE will be set
+ // into the data buffer.
+ data[i] = (byte)((data[i] & mask ) |
+ ((datum&0xFF) >>> rightShift));
+ data[++i] = (byte)((datum & 0xFF) << leftShift);
+ } else if (xRemaining > leftShift) {
+ // All the "leftShift" high bits will be set
+ // into the data buffer. But not all the
+ // "rightShift" low bits will be set.
+ data[i] = (byte)((data[i] & mask ) |
+ ((datum&0xFF) >>> rightShift));
+ i++;
+ data[i] =
+ (byte)((data[i] & mask1) | ((datum & 0xFF) << leftShift));
+ }
+ else {
+ // Less than "leftShift" high bits will be set.
+ int remainMask = (1 << leftShift - xRemaining) - 1;
+ data[i] =
+ (byte)((data[i] & (mask | remainMask)) |
+ (datum&0xFF) >>> rightShift & ~remainMask);
+ }
+ xRemaining -= 8;
+ }
+ eltOffset += lineStride;
+ }
+ }
+ } else if(dataBuffer instanceof DataBufferShort ||
+ dataBuffer instanceof DataBufferUShort) {
+ short[] data = dataBuffer instanceof DataBufferShort ?
+ ((DataBufferShort)dataBuffer).getData() :
+ ((DataBufferUShort)dataBuffer).getData();
+
+ int rightShift = bitOffset & 7;
+ int leftShift = 8 - rightShift;
+ int leftShift16 = 16 + leftShift;
+ int mask = (short)(~(255 << leftShift));
+ int mask1 = (short)(65535 << leftShift);
+ int mask2 = (short)~mask1;
+
+ for(int y = 0; y < rectHeight; y++) {
+ int bOffset = bitOffset;
+ int xRemaining = rectWidth;
+ for(int x = 0; x < rectWidth;
+ x += 8, bOffset += 8, xRemaining -= 8) {
+ int i = eltOffset + (bOffset >> 4);
+ int mod = bOffset & 15;
+ int datum = binaryDataArray[b++] & 0xFF;
+ if(mod <= 8) {
+ // This BYTE is set into one SHORT
+ if (xRemaining < 8) {
+ // Mask the bits to be set.
+ datum &= 255 << 8 - xRemaining;
+ }
+ data[i] = (short)((data[i] & mask) | (datum << leftShift));
+ } else if (xRemaining > leftShift16) {
+ // This BYTE will be set into two SHORTs
+ data[i] = (short)((data[i] & mask1) | ((datum >>> rightShift)&0xFFFF));
+ data[++i] =
+ (short)((datum << leftShift)&0xFFFF);
+ } else if (xRemaining > leftShift) {
+ // This BYTE will be set into two SHORTs;
+ // But not all the low bits will be set into SHORT
+ data[i] = (short)((data[i] & mask1) | ((datum >>> rightShift)&0xFFFF));
+ i++;
+ data[i] =
+ (short)((data[i] & mask2) | ((datum << leftShift)&0xFFFF));
+ } else {
+ // Only some of the high bits will be set into
+ // SHORTs
+ int remainMask = (1 << leftShift - xRemaining) - 1;
+ data[i] = (short)((data[i] & (mask1 | remainMask)) |
+ ((datum >>> rightShift)&0xFFFF & ~remainMask));
+ }
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferInt) {
+ int[] data = ((DataBufferInt)dataBuffer).getData();
+ int rightShift = bitOffset & 7;
+ int leftShift = 8 - rightShift;
+ int leftShift32 = 32 + leftShift;
+ int mask = 0xFFFFFFFF << leftShift;
+ int mask1 = ~mask;
+
+ for(int y = 0; y < rectHeight; y++) {
+ int bOffset = bitOffset;
+ int xRemaining = rectWidth;
+ for(int x = 0; x < rectWidth;
+ x += 8, bOffset += 8, xRemaining -= 8) {
+ int i = eltOffset + (bOffset >> 5);
+ int mod = bOffset & 31;
+ int datum = binaryDataArray[b++] & 0xFF;
+ if(mod <= 24) {
+ // This BYTE is set into one INT
+ int shift = 24 - mod;
+ if (xRemaining < 8) {
+ // Mask the bits to be set.
+ datum &= 255 << 8 - xRemaining;
+ }
+ data[i] = (data[i] & (~(255 << shift))) | (datum << shift);
+ } else if (xRemaining > leftShift32) {
+ // All the bits of this BYTE will be set into two INTs
+ data[i] = (data[i] & mask) | (datum >>> rightShift);
+ data[++i] = datum << leftShift;
+ } else if (xRemaining > leftShift) {
+ // This BYTE will be set into two INTs;
+ // But not all the low bits will be set into INT
+ data[i] = (data[i] & mask) | (datum >>> rightShift);
+ i++;
+ data[i] = (data[i] & mask1) | (datum << leftShift);
+ } else {
+ // Only some of the high bits will be set into INT
+ int remainMask = (1 << leftShift - xRemaining) - 1;
+ data[i] = (data[i] & (mask | remainMask)) |
+ (datum >>> rightShift & ~remainMask);
+ }
+ }
+ eltOffset += lineStride;
+ }
+ }
+ }
+ }
+
+ /**
+ * Copies data into the packed array of the <code>Raster</code>
+ * from an array of unpacked data of the form returned by
+ * <code>getUnpackedBinaryData()</code>.
+ *
+ * <p> If the data are binary, then the target bit will be set if
+ * and only if the corresponding byte is non-zero.
+ *
+ * @throws IllegalArgumentException if <code>isBinary()</code> returns
+ * <code>false</code> with the <code>SampleModel</code> of the
+ * supplied <code>Raster</code> as argument.
+ */
+ public static void setUnpackedBinaryData(byte[] bdata,
+ WritableRaster raster,
+ Rectangle rect) {
+ SampleModel sm = raster.getSampleModel();
+ if(!isBinary(sm)) {
+ throw new IllegalArgumentException(I18N.getString("ImageUtil0"));
+ }
+
+ int rectX = rect.x;
+ int rectY = rect.y;
+ int rectWidth = rect.width;
+ int rectHeight = rect.height;
+
+ DataBuffer dataBuffer = raster.getDataBuffer();
+
+ int dx = rectX - raster.getSampleModelTranslateX();
+ int dy = rectY - raster.getSampleModelTranslateY();
+
+ MultiPixelPackedSampleModel mpp = (MultiPixelPackedSampleModel)sm;
+ int lineStride = mpp.getScanlineStride();
+ int eltOffset = dataBuffer.getOffset() + mpp.getOffset(dx, dy);
+ int bitOffset = mpp.getBitOffset(dx);
+
+ int k = 0;
+
+ if(dataBuffer instanceof DataBufferByte) {
+ byte[] data = ((DataBufferByte)dataBuffer).getData();
+ for(int y = 0; y < rectHeight; y++) {
+ int bOffset = eltOffset*8 + bitOffset;
+ for(int x = 0; x < rectWidth; x++) {
+ if(bdata[k++] != (byte)0) {
+ data[bOffset/8] |=
+ (byte)(0x00000001 << (7 - bOffset & 7));
+ }
+ bOffset++;
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferShort ||
+ dataBuffer instanceof DataBufferUShort) {
+ short[] data = dataBuffer instanceof DataBufferShort ?
+ ((DataBufferShort)dataBuffer).getData() :
+ ((DataBufferUShort)dataBuffer).getData();
+ for(int y = 0; y < rectHeight; y++) {
+ int bOffset = eltOffset*16 + bitOffset;
+ for(int x = 0; x < rectWidth; x++) {
+ if(bdata[k++] != (byte)0) {
+ data[bOffset/16] |=
+ (short)(0x00000001 <<
+ (15 - bOffset % 16));
+ }
+ bOffset++;
+ }
+ eltOffset += lineStride;
+ }
+ } else if(dataBuffer instanceof DataBufferInt) {
+ int[] data = ((DataBufferInt)dataBuffer).getData();
+ for(int y = 0; y < rectHeight; y++) {
+ int bOffset = eltOffset*32 + bitOffset;
+ for(int x = 0; x < rectWidth; x++) {
+ if(bdata[k++] != (byte)0) {
+ data[bOffset/32] |=
+ (0x00000001 << (31 - bOffset % 32));
+ }
+ bOffset++;
+ }
+ eltOffset += lineStride;
+ }
+ }
+ }
+
+ public static boolean isBinary(SampleModel sm) {
+ return sm instanceof MultiPixelPackedSampleModel &&
+ ((MultiPixelPackedSampleModel)sm).getPixelBitStride() == 1 &&
+ sm.getNumBands() == 1;
+ }
+
+ public static ColorModel createColorModel(ColorSpace colorSpace,
+ SampleModel sampleModel) {
+ ColorModel colorModel = null;
+
+ if(sampleModel == null) {
+ throw new IllegalArgumentException(I18N.getString("ImageUtil1"));
+ }
+
+ int numBands = sampleModel.getNumBands();
+ if (numBands < 1 || numBands > 4) {
+ return null;
+ }
+
+ int dataType = sampleModel.getDataType();
+ if (sampleModel instanceof ComponentSampleModel) {
+ if (dataType < DataBuffer.TYPE_BYTE ||
+ //dataType == DataBuffer.TYPE_SHORT ||
+ dataType > DataBuffer.TYPE_DOUBLE) {
+ return null;
+ }
+
+ if (colorSpace == null)
+ colorSpace =
+ numBands <= 2 ?
+ ColorSpace.getInstance(ColorSpace.CS_GRAY) :
+ ColorSpace.getInstance(ColorSpace.CS_sRGB);
+
+ boolean useAlpha = (numBands == 2) || (numBands == 4);
+ int transparency = useAlpha ?
+ Transparency.TRANSLUCENT : Transparency.OPAQUE;
+
+ boolean premultiplied = false;
+
+ int dataTypeSize = DataBuffer.getDataTypeSize(dataType);
+ int[] bits = new int[numBands];
+ for (int i = 0; i < numBands; i++) {
+ bits[i] = dataTypeSize;
+ }
+
+ colorModel = new ComponentColorModel(colorSpace,
+ bits,
+ useAlpha,
+ premultiplied,
+ transparency,
+ dataType);
+ } else if (sampleModel instanceof SinglePixelPackedSampleModel) {
+ SinglePixelPackedSampleModel sppsm =
+ (SinglePixelPackedSampleModel)sampleModel;
+
+ int[] bitMasks = sppsm.getBitMasks();
+ int rmask = 0;
+ int gmask = 0;
+ int bmask = 0;
+ int amask = 0;
+
+ numBands = bitMasks.length;
+ if (numBands <= 2) {
+ rmask = gmask = bmask = bitMasks[0];
+ if (numBands == 2) {
+ amask = bitMasks[1];
+ }
+ } else {
+ rmask = bitMasks[0];
+ gmask = bitMasks[1];
+ bmask = bitMasks[2];
+ if (numBands == 4) {
+ amask = bitMasks[3];
+ }
+ }
+
+ int[] sampleSize = sppsm.getSampleSize();
+ int bits = 0;
+ for (int i = 0; i < sampleSize.length; i++) {
+ bits += sampleSize[i];
+ }
+
+ if (colorSpace == null)
+ colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
+
+ colorModel =
+ new DirectColorModel(colorSpace,
+ bits, rmask, gmask, bmask, amask,
+ false,
+ sampleModel.getDataType());
+ } else if (sampleModel instanceof MultiPixelPackedSampleModel) {
+ int bits =
+ ((MultiPixelPackedSampleModel)sampleModel).getPixelBitStride();
+ int size = 1 << bits;
+ byte[] comp = new byte[size];
+
+ for (int i = 0; i < size; i++)
+ comp[i] = (byte)(255 * i / (size - 1));
+
+ colorModel = new IndexColorModel(bits, size, comp, comp, comp);
+ }
+
+ return colorModel;
+ }
+
+ public static int getElementSize(SampleModel sm) {
+ int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());
+
+ if (sm instanceof MultiPixelPackedSampleModel) {
+ MultiPixelPackedSampleModel mppsm =
+ (MultiPixelPackedSampleModel)sm;
+ return mppsm.getSampleSize(0) * mppsm.getNumBands();
+ } else if (sm instanceof ComponentSampleModel) {
+ return sm.getNumBands() * elementSize;
+ } else if (sm instanceof SinglePixelPackedSampleModel) {
+ return elementSize;
+ }
+
+ return elementSize * sm.getNumBands();
+
+ }
+
+ public static long getTileSize(SampleModel sm) {
+ int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());
+
+ if (sm instanceof MultiPixelPackedSampleModel) {
+ MultiPixelPackedSampleModel mppsm =
+ (MultiPixelPackedSampleModel)sm;
+ return (mppsm.getScanlineStride() * mppsm.getHeight() +
+ (mppsm.getDataBitOffset() + elementSize -1) / elementSize) *
+ ((elementSize + 7) / 8);
+ } else if (sm instanceof ComponentSampleModel) {
+ ComponentSampleModel csm = (ComponentSampleModel)sm;
+ int[] bandOffsets = csm.getBandOffsets();
+ int maxBandOff = bandOffsets[0];
+ for (int i=1; i<bandOffsets.length; i++)
+ maxBandOff = Math.max(maxBandOff, bandOffsets[i]);
+
+ long size = 0;
+ int pixelStride = csm.getPixelStride();
+ int scanlineStride = csm.getScanlineStride();
+ if (maxBandOff >= 0)
+ size += maxBandOff + 1;
+ if (pixelStride > 0)
+ size += pixelStride * (sm.getWidth() - 1);
+ if (scanlineStride > 0)
+ size += scanlineStride * (sm.getHeight() - 1);
+
+ int[] bankIndices = csm.getBankIndices();
+ maxBandOff = bankIndices[0];
+ for (int i=1; i<bankIndices.length; i++)
+ maxBandOff = Math.max(maxBandOff, bankIndices[i]);
+ return size * (maxBandOff + 1) * ((elementSize + 7) / 8);
+ } else if (sm instanceof SinglePixelPackedSampleModel) {
+ SinglePixelPackedSampleModel sppsm =
+ (SinglePixelPackedSampleModel)sm;
+ long size = sppsm.getScanlineStride() * (sppsm.getHeight() - 1) +
+ sppsm.getWidth();
+ return size * ((elementSize + 7) / 8);
+ }
+
+ return 0;
+ }
+
+ public static long getBandSize(SampleModel sm) {
+ int elementSize = DataBuffer.getDataTypeSize(sm.getDataType());
+
+ if (sm instanceof ComponentSampleModel) {
+ ComponentSampleModel csm = (ComponentSampleModel)sm;
+ int pixelStride = csm.getPixelStride();
+ int scanlineStride = csm.getScanlineStride();
+ long size = Math.min(pixelStride, scanlineStride);
+
+ if (pixelStride > 0)
+ size += pixelStride * (sm.getWidth() - 1);
+ if (scanlineStride > 0)
+ size += scanlineStride * (sm.getHeight() - 1);
+ return size * ((elementSize + 7) / 8);
+ } else
+ return getTileSize(sm);
+ }
+ /**
+ * Tests whether the color indices represent a gray-scale image.
+ *
+ * @param r The red channel color indices.
+ * @param g The green channel color indices.
+ * @param b The blue channel color indices.
+ * @return If all the indices have 256 entries, and are identical mappings,
+ * return <code>true</code>; otherwise, return <code>false</code>.
+ */
+ public static boolean isIndicesForGrayscale(byte[] r, byte[] g, byte[] b) {
+ if (r.length != g.length || r.length != b.length)
+ return false;
+
+ int size = r.length;
+
+ if (size != 256)
+ return false;
+
+ for (int i = 0; i < size; i++) {
+ byte temp = (byte) i;
+
+ if (r[i] != temp || g[i] != temp || b[i] != temp)
+ return false;
+ }
+
+ return true;
+ }
+
+ /** Converts the provided object to <code>String</code> */
+ public static String convertObjectToString(Object obj) {
+ if (obj == null)
+ return "";
+
+ String s = "";
+ if (obj instanceof byte[]) {
+ byte[] bArray = (byte[])obj;
+ for (int i = 0; i < bArray.length; i++)
+ s += bArray[i] + " ";
+ return s;
+ }
+
+ if (obj instanceof int[]) {
+ int[] iArray = (int[])obj;
+ for (int i = 0; i < iArray.length; i++)
+ s += iArray[i] + " " ;
+ return s;
+ }
+
+ if (obj instanceof short[]) {
+ short[] sArray = (short[])obj;
+ for (int i = 0; i < sArray.length; i++)
+ s += sArray[i] + " " ;
+ return s;
+ }
+
+ return obj.toString();
+
+ }
+
+ /** Checks that the provided <code>ImageWriter</code> can encode
+ * the provided <code>ImageTypeSpecifier</code> or not. If not, an
+ * <code>IIOException</code> will be thrown.
+ * @param writer The provided <code>ImageWriter</code>.
+ * @param type The image to be tested.
+ * @throws IIOException If the writer cannot encoded the provided image.
+ */
+ public static final void canEncodeImage(ImageWriter writer,
+ ImageTypeSpecifier type)
+ throws IIOException {
+ ImageWriterSpi spi = writer.getOriginatingProvider();
+
+ if(type != null && spi != null && !spi.canEncodeImage(type)) {
+ throw new IIOException(I18N.getString("ImageUtil2")+" "+
+ writer.getClass().getName());
+ }
+ }
+
+ /** Checks that the provided <code>ImageWriter</code> can encode
+ * the provided <code>ColorModel</code> and <code>SampleModel</code>.
+ * If not, an <code>IIOException</code> will be thrown.
+ * @param writer The provided <code>ImageWriter</code>.
+ * @param colorModel The provided <code>ColorModel</code>.
+ * @param sampleModel The provided <code>SampleModel</code>.
+ * @throws IIOException If the writer cannot encoded the provided image.
+ */
+ public static final void canEncodeImage(ImageWriter writer,
+ ColorModel colorModel,
+ SampleModel sampleModel)
+ throws IIOException {
+ ImageTypeSpecifier type = null;
+ if (colorModel != null && sampleModel != null)
+ type = new ImageTypeSpecifier(colorModel, sampleModel);
+ canEncodeImage(writer, type);
+ }
+
+ /**
+ * Returns whether the image has contiguous data across rows.
+ */
+ public static final boolean imageIsContiguous(RenderedImage image) {
+ SampleModel sm;
+ if(image instanceof BufferedImage) {
+ WritableRaster ras = ((BufferedImage)image).getRaster();
+ sm = ras.getSampleModel();
+ } else {
+ sm = image.getSampleModel();
+ }
+
+ if (sm instanceof ComponentSampleModel) {
+ // Ensure image rows samples are stored contiguously
+ // in a single bank.
+ ComponentSampleModel csm = (ComponentSampleModel)sm;
+
+ if (csm.getPixelStride() != csm.getNumBands()) {
+ return false;
+ }
+
+ int[] bandOffsets = csm.getBandOffsets();
+ for (int i = 0; i < bandOffsets.length; i++) {
+ if (bandOffsets[i] != i) {
+ return false;
+ }
+ }
+
+ int[] bankIndices = csm.getBankIndices();
+ for (int i = 0; i < bandOffsets.length; i++) {
+ if (bankIndices[i] != 0) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ // Otherwise true if and only if it's a bilevel image with
+ // a MultiPixelPackedSampleModel, 1 bit per pixel, and 1 bit
+ // pixel stride.
+ return ImageUtil.isBinary(sm);
+ }
+}