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/*
* $RCSfile: BMPImageReader.java,v $
*
*
* Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for
* use in the design, construction, operation or maintenance of any
* nuclear facility.
*
* $Revision: 1.2 $
* $Date: 2006/04/14 21:29:14 $
* $State: Exp $
*/
package com.github.jaiimageio.impl.plugins.bmp;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.color.ColorSpace;
import java.awt.color.ICC_ColorSpace;
import java.awt.color.ICC_Profile;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.ComponentSampleModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.DataBufferInt;
import java.awt.image.DataBufferUShort;
import java.awt.image.DirectColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.MultiPixelPackedSampleModel;
import java.awt.image.PixelInterleavedSampleModel;
import java.awt.image.Raster;
import java.awt.image.SampleModel;
import java.awt.image.SinglePixelPackedSampleModel;
import java.awt.image.WritableRaster;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.event.IIOReadProgressListener;
import javax.imageio.event.IIOReadUpdateListener;
import javax.imageio.event.IIOReadWarningListener;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
import com.github.jaiimageio.impl.common.ImageUtil;
/** This class is the Java Image IO plugin reader for BMP images.
* It may subsample the image, clip the image, select sub-bands,
* and shift the decoded image origin if the proper decoding parameter
* are set in the provided ImageReadParam.
*
* This class supports Microsoft Windows Bitmap Version 3-5,
* as well as OS/2 Bitmap Version 2.x (for single-image BMP file).
*/
public class BMPImageReader extends ImageReader implements BMPConstants {
// BMP Image types
private static final int VERSION_2_1_BIT = 0;
private static final int VERSION_2_4_BIT = 1;
private static final int VERSION_2_8_BIT = 2;
private static final int VERSION_2_24_BIT = 3;
private static final int VERSION_3_1_BIT = 4;
private static final int VERSION_3_4_BIT = 5;
private static final int VERSION_3_8_BIT = 6;
private static final int VERSION_3_24_BIT = 7;
private static final int VERSION_3_NT_16_BIT = 8;
private static final int VERSION_3_NT_32_BIT = 9;
private static final int VERSION_4_1_BIT = 10;
private static final int VERSION_4_4_BIT = 11;
private static final int VERSION_4_8_BIT = 12;
private static final int VERSION_4_16_BIT = 13;
private static final int VERSION_4_24_BIT = 14;
private static final int VERSION_4_32_BIT = 15;
private static final int VERSION_3_XP_EMBEDDED = 16;
private static final int VERSION_4_XP_EMBEDDED = 17;
private static final int VERSION_5_XP_EMBEDDED = 18;
// BMP variables
private long bitmapFileSize;
private long bitmapOffset;
private long compression;
private long imageSize;
private byte palette[];
private int imageType;
private int numBands;
private boolean isBottomUp;
private int bitsPerPixel;
private int redMask, greenMask, blueMask, alphaMask;
private SampleModel sampleModel, originalSampleModel;
private ColorModel colorModel, originalColorModel;
/** The input stream where reads from */
private ImageInputStream iis = null;
/** Indicates whether the header is read. */
private boolean gotHeader = false;
/** The stream position where the image data starts. */
private long imageDataOffset;
/** The original image width. */
private int width;
/** The original image height. */
private int height;
/** The destination region. */
private Rectangle destinationRegion;
/** The source region. */
private Rectangle sourceRegion;
/** The metadata from the stream. */
private BMPMetadata metadata;
/** The destination image. */
private BufferedImage bi;
/** Indicates whether subsampled, subregion is required, and offset is
* defined
*/
private boolean noTransform = true;
/** Indicates whether subband is selected. */
private boolean seleBand = false;
/** The scaling factors. */
private int scaleX, scaleY;
/** source and destination bands. */
private int[] sourceBands, destBands;
/** Constructs BMPImageReader from the provided
* ImageReaderSpi.
*/
public BMPImageReader(ImageReaderSpi originator) {
super(originator);
}
/** Overrides the method defined in the superclass. */
public void setInput(Object input,
boolean seekForwardOnly,
boolean ignoreMetadata) {
super.setInput(input, seekForwardOnly, ignoreMetadata);
iis = (ImageInputStream) input; // Always works
if(iis != null)
iis.setByteOrder(ByteOrder.LITTLE_ENDIAN);
resetHeaderInfo();
}
/** Overrides the method defined in the superclass. */
public int getNumImages(boolean allowSearch) throws IOException {
if (iis == null) {
throw new IllegalStateException(I18N.getString("GetNumImages0"));
}
if (seekForwardOnly && allowSearch) {
throw new IllegalStateException(I18N.getString("GetNumImages1"));
}
return 1;
}
public int getWidth(int imageIndex) throws IOException {
checkIndex(imageIndex);
readHeader();
return width;
}
public int getHeight(int imageIndex) throws IOException {
checkIndex(imageIndex);
readHeader();
return height;
}
private void checkIndex(int imageIndex) {
if (imageIndex != 0) {
throw new IndexOutOfBoundsException(I18N.getString("BMPImageReader0"));
}
}
public void readHeader() throws IOException {
if (gotHeader) {
// Seek to where the image data starts, since that is where
// the stream pointer should be after header is read
iis.seek(imageDataOffset);
return;
}
if (iis == null) {
throw new IllegalStateException(I18N.getString("BMPImageReader5"));
}
int profileData = 0, profileSize = 0;
this.metadata = new BMPMetadata();
iis.mark();
// read and check the magic marker
byte[] marker = new byte[2];
iis.read(marker);
if (marker[0] != 0x42 || marker[1] != 0x4d)
throw new IllegalArgumentException(I18N.getString("BMPImageReader1"));
// Read file size
bitmapFileSize = iis.readUnsignedInt();
// skip the two reserved fields
iis.skipBytes(4);
// Offset to the bitmap from the beginning
bitmapOffset = iis.readUnsignedInt();
// End File Header
// Start BitmapCoreHeader
long size = iis.readUnsignedInt();
if (size == 12) {
width = iis.readShort();
height = iis.readShort();
} else {
width = iis.readInt();
height = iis.readInt();
}
metadata.width = width;
metadata.height = height;
int planes = iis.readUnsignedShort();
bitsPerPixel = iis.readUnsignedShort();
//metadata.colorPlane = planes;
metadata.bitsPerPixel = (short)bitsPerPixel;
// As BMP always has 3 rgb bands, except for Version 5,
// which is bgra
numBands = 3;
if (size == 12) {
// Windows 2.x and OS/2 1.x
metadata.bmpVersion = VERSION_2;
// Classify the image type
if (bitsPerPixel == 1) {
imageType = VERSION_2_1_BIT;
} else if (bitsPerPixel == 4) {
imageType = VERSION_2_4_BIT;
} else if (bitsPerPixel == 8) {
imageType = VERSION_2_8_BIT;
} else if (bitsPerPixel == 24) {
imageType = VERSION_2_24_BIT;
}
// Read in the palette
int numberOfEntries = (int)((bitmapOffset - 14 - size) / 3);
int sizeOfPalette = numberOfEntries*3;
palette = new byte[sizeOfPalette];
iis.readFully(palette, 0, sizeOfPalette);
metadata.palette = palette;
metadata.paletteSize = numberOfEntries;
} else {
compression = iis.readUnsignedInt();
imageSize = iis.readUnsignedInt();
long xPelsPerMeter = iis.readInt();
long yPelsPerMeter = iis.readInt();
long colorsUsed = iis.readUnsignedInt();
long colorsImportant = iis.readUnsignedInt();
metadata.compression = (int)compression;
metadata.imageSize = (int)imageSize;
metadata.xPixelsPerMeter = (int)xPelsPerMeter;
metadata.yPixelsPerMeter = (int)yPelsPerMeter;
metadata.colorsUsed = (int)colorsUsed;
metadata.colorsImportant = (int)colorsImportant;
if (size == 40) {
// Windows 3.x and Windows NT
switch((int)compression) {
case BI_JPEG:
case BI_PNG:
metadata.bmpVersion = VERSION_3;
imageType = VERSION_3_XP_EMBEDDED;
break;
case BI_RGB: // No compression
case BI_RLE8: // 8-bit RLE compression
case BI_RLE4: // 4-bit RLE compression
// Read in the palette
int numberOfEntries = (int)((bitmapOffset-14-size) / 4);
int sizeOfPalette = numberOfEntries * 4;
palette = new byte[sizeOfPalette];
iis.readFully(palette, 0, sizeOfPalette);
metadata.palette = palette;
metadata.paletteSize = numberOfEntries;
if (bitsPerPixel == 1) {
imageType = VERSION_3_1_BIT;
} else if (bitsPerPixel == 4) {
imageType = VERSION_3_4_BIT;
} else if (bitsPerPixel == 8) {
imageType = VERSION_3_8_BIT;
} else if (bitsPerPixel == 24) {
imageType = VERSION_3_24_BIT;
} else if (bitsPerPixel == 16) {
imageType = VERSION_3_NT_16_BIT;
redMask = 0x7C00;
greenMask = 0x3E0;
blueMask = (1 << 5) - 1;// 0x1F;
metadata.redMask = redMask;
metadata.greenMask = greenMask;
metadata.blueMask = blueMask;
} else if (bitsPerPixel == 32) {
imageType = VERSION_3_NT_32_BIT;
redMask = 0x00FF0000;
greenMask = 0x0000FF00;
blueMask = 0x000000FF;
metadata.redMask = redMask;
metadata.greenMask = greenMask;
metadata.blueMask = blueMask;
}
metadata.bmpVersion = VERSION_3;
break;
case BI_BITFIELDS:
if (bitsPerPixel == 16) {
imageType = VERSION_3_NT_16_BIT;
} else if (bitsPerPixel == 32) {
imageType = VERSION_3_NT_32_BIT;
}
// BitsField encoding
redMask = (int)iis.readUnsignedInt();
greenMask = (int)iis.readUnsignedInt();
blueMask = (int)iis.readUnsignedInt();
metadata.redMask = redMask;
metadata.greenMask = greenMask;
metadata.blueMask = blueMask;
if (colorsUsed != 0) {
// there is a palette
sizeOfPalette = (int)colorsUsed*4;
palette = new byte[sizeOfPalette];
iis.readFully(palette, 0, sizeOfPalette);
metadata.palette = palette;
metadata.paletteSize = (int)colorsUsed;
}
metadata.bmpVersion = VERSION_3_NT;
break;
default:
throw new
RuntimeException(I18N.getString("BMPImageReader2"));
}
} else if (size == 108 || size == 124) {
// Windows 4.x BMP
if (size == 108)
metadata.bmpVersion = VERSION_4;
else if (size == 124)
metadata.bmpVersion = VERSION_5;
// rgb masks, valid only if comp is BI_BITFIELDS
redMask = (int)iis.readUnsignedInt();
greenMask = (int)iis.readUnsignedInt();
blueMask = (int)iis.readUnsignedInt();
// Only supported for 32bpp BI_RGB argb
alphaMask = (int)iis.readUnsignedInt();
long csType = iis.readUnsignedInt();
int redX = iis.readInt();
int redY = iis.readInt();
int redZ = iis.readInt();
int greenX = iis.readInt();
int greenY = iis.readInt();
int greenZ = iis.readInt();
int blueX = iis.readInt();
int blueY = iis.readInt();
int blueZ = iis.readInt();
long gammaRed = iis.readUnsignedInt();
long gammaGreen = iis.readUnsignedInt();
long gammaBlue = iis.readUnsignedInt();
if (size == 124) {
metadata.intent = iis.readInt();
profileData = iis.readInt();
profileSize = iis.readInt();
iis.skipBytes(4);
}
metadata.colorSpace = (int)csType;
if (csType == LCS_CALIBRATED_RGB) {
// All the new fields are valid only for this case
metadata.redX = redX;
metadata.redY = redY;
metadata.redZ = redZ;
metadata.greenX = greenX;
metadata.greenY = greenY;
metadata.greenZ = greenZ;
metadata.blueX = blueX;
metadata.blueY = blueY;
metadata.blueZ = blueZ;
metadata.gammaRed = (int)gammaRed;
metadata.gammaGreen = (int)gammaGreen;
metadata.gammaBlue = (int)gammaBlue;
}
// Read in the palette
int numberOfEntries = (int)((bitmapOffset-14-size) / 4);
int sizeOfPalette = numberOfEntries*4;
palette = new byte[sizeOfPalette];
iis.readFully(palette, 0, sizeOfPalette);
metadata.palette = palette;
metadata.paletteSize = numberOfEntries;
switch ((int)compression) {
case BI_JPEG:
case BI_PNG:
if (size == 108) {
imageType = VERSION_4_XP_EMBEDDED;
} else if (size == 124) {
imageType = VERSION_5_XP_EMBEDDED;
}
break;
default:
if (bitsPerPixel == 1) {
imageType = VERSION_4_1_BIT;
} else if (bitsPerPixel == 4) {
imageType = VERSION_4_4_BIT;
} else if (bitsPerPixel == 8) {
imageType = VERSION_4_8_BIT;
} else if (bitsPerPixel == 16) {
imageType = VERSION_4_16_BIT;
if ((int)compression == BI_RGB) {
redMask = 0x7C00;
greenMask = 0x3E0;
blueMask = 0x1F;
}
} else if (bitsPerPixel == 24) {
imageType = VERSION_4_24_BIT;
} else if (bitsPerPixel == 32) {
imageType = VERSION_4_32_BIT;
if ((int)compression == BI_RGB) {
redMask = 0x00FF0000;
greenMask = 0x0000FF00;
blueMask = 0x000000FF;
}
}
metadata.redMask = redMask;
metadata.greenMask = greenMask;
metadata.blueMask = blueMask;
metadata.alphaMask = alphaMask;
}
} else {
throw new
RuntimeException(I18N.getString("BMPImageReader3"));
}
}
if (height > 0) {
// bottom up image
isBottomUp = true;
} else {
// top down image
isBottomUp = false;
height = Math.abs(height);
}
// Reset Image Layout so there's only one tile.
//Define the color space
ColorSpace colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
if (metadata.colorSpace == PROFILE_LINKED ||
metadata.colorSpace == PROFILE_EMBEDDED) {
iis.mark();
iis.skipBytes(profileData - size);
byte[] profile = new byte[profileSize];
iis.readFully(profile, 0, profileSize);
iis.reset();
try {
if (metadata.colorSpace == PROFILE_LINKED)
colorSpace =
new ICC_ColorSpace(ICC_Profile.getInstance(new String(profile)));
else
colorSpace =
new ICC_ColorSpace(ICC_Profile.getInstance(profile));
} catch (Exception e) {
colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
}
}
if (bitsPerPixel == 0 ||
compression == BI_JPEG || compression == BI_PNG )
{
// the colorModel and sampleModel will be initialzed
// by the reader of embedded image
colorModel = null;
sampleModel = null;
} else if (bitsPerPixel == 1 || bitsPerPixel == 4 || bitsPerPixel == 8) {
// When number of bitsPerPixel is <= 8, we use IndexColorModel.
numBands = 1;
if (bitsPerPixel == 8) {
int[] bandOffsets = new int[numBands];
for (int i = 0; i < numBands; i++) {
bandOffsets[i] = numBands -1 -i;
}
sampleModel =
new PixelInterleavedSampleModel(DataBuffer.TYPE_BYTE,
width, height,
numBands,
numBands * width,
bandOffsets);
} else {
// 1 and 4 bit pixels can be stored in a packed format.
sampleModel =
new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
width, height,
bitsPerPixel);
}
// Create IndexColorModel from the palette.
byte r[], g[], b[];
if (imageType == VERSION_2_1_BIT ||
imageType == VERSION_2_4_BIT ||
imageType == VERSION_2_8_BIT) {
size = palette.length/3;
if (size > 256) {
size = 256;
}
int off;
r = new byte[(int)size];
g = new byte[(int)size];
b = new byte[(int)size];
for (int i=0; i<(int)size; i++) {
off = 3 * i;
b[i] = palette[off];
g[i] = palette[off+1];
r[i] = palette[off+2];
}
} else {
size = palette.length/4;
if (size > 256) {
size = 256;
}
int off;
r = new byte[(int)size];
g = new byte[(int)size];
b = new byte[(int)size];
for (int i=0; i> 3;
srcOff[j] = 7 - (x & 7);
destPos[j] = i >> 3;
destOff[j] = 7 - (i & 7);
}
int k = destinationRegion.y * lineStride;
if (isBottomUp)
k += (destinationRegion.height - 1) * lineStride;
for (int j = 0, y = sourceRegion.y;
j < destinationRegion.height; j++, y+=scaleY) {
if (abortRequested())
break;
iis.read(buf, 0, lineLength);
for (int i = 0; i < destinationRegion.width; i++) {
//get the bit and assign to the data buffer of the raster
int v = (buf[srcPos[i]] >> srcOff[i]) & 1;
bdata[k + destPos[i]] |= v << destOff[i];
}
k += isBottomUp ? -lineStride : lineStride;
iis.skipBytes(skipLength);
processImageUpdate(bi, 0, j,
destinationRegion.width, 1, 1, 1,
new int[]{0});
processImageProgress(100.0F*j/destinationRegion.height);
}
}
}
// Method to read a 4 bit BMP image data
private void read4Bit(byte[] bdata) throws IOException {
int bytesPerScanline = (width + 1) / 2;
// Padding bytes at the end of each scanline
int padding = bytesPerScanline % 4;
if (padding != 0)
padding = 4 - padding;
int lineLength = bytesPerScanline + padding;
if (noTransform) {
int j = isBottomUp ? (height -1) * bytesPerScanline : 0;
for (int i=0; i> 1;
srcOff[j] = (1 - (x & 1)) << 2;
destPos[j] = i >> 1;
destOff[j] = (1 - (i & 1)) << 2;
}
int k = destinationRegion.y * lineStride;
if (isBottomUp)
k += (destinationRegion.height - 1) * lineStride;
for (int j = 0, y = sourceRegion.y;
j < destinationRegion.height; j++, y+=scaleY) {
if (abortRequested())
break;
iis.read(buf, 0, lineLength);
for (int i = 0; i < destinationRegion.width; i++) {
//get the bit and assign to the data buffer of the raster
int v = (buf[srcPos[i]] >> srcOff[i]) & 0x0F;
bdata[k + destPos[i]] |= v << destOff[i];
}
k += isBottomUp ? -lineStride : lineStride;
iis.skipBytes(skipLength);
processImageUpdate(bi, 0, j,
destinationRegion.width, 1, 1, 1,
new int[]{0});
processImageProgress(100.0F*j/destinationRegion.height);
}
}
}
// Method to read 8 bit BMP image data
private void read8Bit(byte[] bdata) throws IOException {
// Padding bytes at the end of each scanline
int padding = width % 4;
if (padding != 0) {
padding = 4 - padding;
}
int lineLength = width + padding;
if (noTransform) {
int j = isBottomUp ? (height -1) * width : 0;
for (int i=0; i= sourceRegion.y &&
lineNo < sourceRegion.y + sourceRegion.height) {
if (noTransform) {
int pos = lineNo * width;
for(int i = 0; i < width; i++)
bdata[pos++] = val[i];
processImageUpdate(bi, 0, lineNo,
destinationRegion.width, 1, 1, 1,
new int[]{0});
finished++;
} else if ((lineNo - sourceRegion.y) % scaleY == 0) {
int currentLine = (lineNo - sourceRegion.y) / scaleY +
destinationRegion.y;
int pos = currentLine * lineStride;
pos += destinationRegion.x;
for (int i = sourceRegion.x;
i < sourceRegion.x + sourceRegion.width;
i += scaleX)
bdata[pos++] = val[i];
processImageUpdate(bi, 0, currentLine,
destinationRegion.width, 1, 1, 1,
new int[]{0});
finished++;
}
}
processImageProgress(100.0F * finished / destinationRegion.height);
lineNo += isBottomUp ? -1 : 1;
l = 0;
if (abortRequested()) {
break;
}
// End-of-RLE marker
if ((values[count-1] & 0xff) == 1)
flag = true;
break;
case 2:
// delta or vector marker
int xoff = values[count++] & 0xff;
int yoff = values[count] & 0xff;
// Move to the position xoff, yoff down
l += xoff + yoff*width;
break;
default:
int end = values[count-1] & 0xff;
for (int i=0; i= sourceRegion.y &&
lineNo < sourceRegion.y + sourceRegion.height) {
if (noTransform) {
int pos = lineNo * (width + 1 >> 1);
for(int i = 0, j = 0; i < width >> 1; i++)
bdata[pos++] =
(byte)((val[j++] << 4) | val[j++]);
if ((width & 1) == 1)
bdata[pos] |= val[width - 1] << 4;
processImageUpdate(bi, 0, lineNo,
destinationRegion.width, 1, 1, 1,
new int[]{0});
finished++;
} else if ((lineNo - sourceRegion.y) % scaleY == 0) {
int currentLine = (lineNo - sourceRegion.y) / scaleY +
destinationRegion.y;
int pos = currentLine * lineStride;
pos += destinationRegion.x >> 1;
int shift = (1 - (destinationRegion.x & 1)) << 2;
for (int i = sourceRegion.x;
i < sourceRegion.x + sourceRegion.width;
i += scaleX) {
bdata[pos] |= val[i] << shift;
shift += 4;
if (shift == 4) {
pos++;
}
shift &= 7;
}
processImageUpdate(bi, 0, currentLine,
destinationRegion.width, 1, 1, 1,
new int[]{0});
finished++;
}
}
processImageProgress(100.0F * finished / destinationRegion.height);
lineNo += isBottomUp ? -1 : 1;
l = 0;
if (abortRequested()) {
break;
}
// End-of-RLE marker
if ((values[count-1] & 0xff) == 1)
flag = true;
break;
case 2:
// delta or vector marker
int xoff = values[count++] & 0xFF;
int yoff = values[count] & 0xFF;
// Move to the position xoff, yoff down
l += xoff + yoff*width;
break;
default:
int end = values[count-1] & 0xFF;
for (int i=0; i> 4
: (values[count++] & 0x0f));
}
// When end is odd, the above for loop does not
// increment count, so do it now.
if ((end & 1) == 1) {
count++;
}
// Whenever end pixels can fit into odd number of bytes,
// an extra padding byte will be present, so skip that.
if ((((int)Math.ceil(end/2)) & 1) ==1 ) {
count++;
}
break;
}
} else {
// Encoded mode
int alternate[] = { (values[count] & 0xf0) >> 4,
values[count] & 0x0f };
for (int i=0; (i < value) && (l < width); i++) {
val[l++] = (byte)alternate[i & 1];
}
count++;
}
// If End-of-RLE data, then exit the while loop
if (flag) {
break;
}
}
}
/** Decodes the jpeg/png image embedded in the bitmap using any jpeg
* ImageIO-style plugin.
*
* @param bi The destination BufferedImage.
* @param bmpParam The ImageReadParam for decoding this
* BMP image. The parameters for subregion, band selection and
* subsampling are used in decoding the jpeg image.
*/
private BufferedImage readEmbedded(int type,
BufferedImage bi, ImageReadParam bmpParam)
throws IOException {
String format;
switch(type) {
case BI_JPEG:
format = "JPEG";
break;
case BI_PNG:
format = "PNG";
break;
default:
throw new
IOException("Unexpected compression type: " + type);
}
ImageReader reader =
(ImageReader)ImageIO.getImageReadersByFormatName(format).next();
if (reader == null) {
throw new RuntimeException(I18N.getString("BMPImageReader4") +
" " + format);
}
// prepare input
byte[] buff = new byte[(int)imageSize];
iis.read(buff);
reader.setInput(ImageIO.createImageInputStream(new ByteArrayInputStream(buff)));
if (bi == null) {
ImageTypeSpecifier embType = (ImageTypeSpecifier)reader.getImageTypes(0).next();
bi = embType.createBufferedImage(destinationRegion.x +
destinationRegion.width,
destinationRegion.y +
destinationRegion.height);
}
reader.addIIOReadProgressListener(new EmbeddedProgressAdapter() {
public void imageProgress(ImageReader source,
float percentageDone)
{
processImageProgress(percentageDone);
}
});
reader.addIIOReadUpdateListener(new IIOReadUpdateListener() {
public void imageUpdate(ImageReader source,
BufferedImage theImage,
int minX, int minY,
int width, int height,
int periodX, int periodY,
int[] bands)
{
processImageUpdate(theImage, minX, minY,
width, height,
periodX, periodY, bands);
}
public void passComplete(ImageReader source,
BufferedImage theImage)
{
processPassComplete(theImage);
}
public void passStarted(ImageReader source,
BufferedImage theImage,
int pass,
int minPass, int maxPass,
int minX, int minY,
int periodX, int periodY,
int[] bands)
{
processPassStarted(theImage, pass, minPass, maxPass,
minX, minY, periodX, periodY,
bands);
}
public void thumbnailPassComplete(ImageReader source,
BufferedImage thumb) {}
public void thumbnailPassStarted(ImageReader source,
BufferedImage thumb,
int pass,
int minPass, int maxPass,
int minX, int minY,
int periodX, int periodY,
int[] bands) {}
public void thumbnailUpdate(ImageReader source,
BufferedImage theThumbnail,
int minX, int minY,
int width, int height,
int periodX, int periodY,
int[] bands) {}
});
reader.addIIOReadWarningListener(new IIOReadWarningListener() {
public void warningOccurred(ImageReader source, String warning)
{
processWarningOccurred(warning);
}
});
ImageReadParam param = reader.getDefaultReadParam();
param.setDestination(bi);
param.setDestinationBands(bmpParam.getDestinationBands());
param.setDestinationOffset(bmpParam.getDestinationOffset());
param.setSourceBands(bmpParam.getSourceBands());
param.setSourceRegion(bmpParam.getSourceRegion());
param.setSourceSubsampling(bmpParam.getSourceXSubsampling(),
bmpParam.getSourceYSubsampling(),
bmpParam.getSubsamplingXOffset(),
bmpParam.getSubsamplingYOffset());
reader.read(0, param);
return bi;
}
private class EmbeddedProgressAdapter implements IIOReadProgressListener {
public void imageComplete(ImageReader src) {}
public void imageProgress(ImageReader src, float percentageDone) {}
public void imageStarted(ImageReader src, int imageIndex) {}
public void thumbnailComplete(ImageReader src) {}
public void thumbnailProgress(ImageReader src, float percentageDone) {}
public void thumbnailStarted(ImageReader src, int iIdx, int tIdx) {}
public void sequenceComplete(ImageReader src) {}
public void sequenceStarted(ImageReader src, int minIndex) {}
public void readAborted(ImageReader src) {}
}
}
