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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * 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).
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package com.sun.imageio.plugins.bmp;

import java.awt.Rectangle;
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.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.BandedSampleModel;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.SinglePixelPackedSampleModel;
import java.awt.image.BufferedImage;

import java.io.IOException;
import java.io.ByteArrayOutputStream;
import java.nio.ByteOrder;
import java.util.Iterator;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.spi.ImageWriterSpi;
import javax.imageio.stream.ImageOutputStream;
import javax.imageio.event.IIOWriteProgressListener;
import javax.imageio.event.IIOWriteWarningListener;


import javax.imageio.plugins.bmp.BMPImageWriteParam;
import com.sun.imageio.plugins.common.ImageUtil;
import com.sun.imageio.plugins.common.I18N;

The Java Image IO plugin writer for encoding a binary RenderedImage into a BMP format. The encoding process may clip, subsample using the parameters specified in the ImageWriteParam.
See Also:
  • BMPImageWriteParam
/** * The Java Image IO plugin writer for encoding a binary RenderedImage into * a BMP format. * * The encoding process may clip, subsample using the parameters * specified in the <code>ImageWriteParam</code>. * * @see javax.imageio.plugins.bmp.BMPImageWriteParam */
public class BMPImageWriter extends ImageWriter implements BMPConstants {
The output stream to write into
/** The output stream to write into */
private ImageOutputStream stream = null; private ByteArrayOutputStream embedded_stream = null; private int version; private int compressionType; private boolean isTopDown; private int w, h; private int compImageSize = 0; private int[] bitMasks; private int[] bitPos; private byte[] bpixels; private short[] spixels; private int[] ipixels;
Constructs BMPImageWriter based on the provided ImageWriterSpi.
/** Constructs <code>BMPImageWriter</code> based on the provided * <code>ImageWriterSpi</code>. */
public BMPImageWriter(ImageWriterSpi originator) { super(originator); } public void setOutput(Object output) { super.setOutput(output); // validates output if (output != null) { if (!(output instanceof ImageOutputStream)) throw new IllegalArgumentException(I18N.getString("BMPImageWriter0")); this.stream = (ImageOutputStream)output; stream.setByteOrder(ByteOrder.LITTLE_ENDIAN); } else this.stream = null; } public ImageWriteParam getDefaultWriteParam() { return new BMPImageWriteParam(); } public IIOMetadata getDefaultStreamMetadata(ImageWriteParam param) { return null; } public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType, ImageWriteParam param) { BMPMetadata meta = new BMPMetadata(); meta.bmpVersion = VERSION_3; meta.compression = getPreferredCompressionType(imageType); if (param != null && param.getCompressionMode() == ImageWriteParam.MODE_EXPLICIT) { meta.compression = BMPCompressionTypes.getType(param.getCompressionType()); } meta.bitsPerPixel = (short)imageType.getColorModel().getPixelSize(); return meta; } public IIOMetadata convertStreamMetadata(IIOMetadata inData, ImageWriteParam param) { return null; } public IIOMetadata convertImageMetadata(IIOMetadata metadata, ImageTypeSpecifier type, ImageWriteParam param) { return null; } public boolean canWriteRasters() { return true; } public void write(IIOMetadata streamMetadata, IIOImage image, ImageWriteParam param) throws IOException { if (stream == null) { throw new IllegalStateException(I18N.getString("BMPImageWriter7")); } if (image == null) { throw new IllegalArgumentException(I18N.getString("BMPImageWriter8")); } clearAbortRequest(); processImageStarted(0); if (param == null) param = getDefaultWriteParam(); BMPImageWriteParam bmpParam = (BMPImageWriteParam)param; // Default is using 24 bits per pixel. int bitsPerPixel = 24; boolean isPalette = false; int paletteEntries = 0; IndexColorModel icm = null; RenderedImage input = null; Raster inputRaster = null; boolean writeRaster = image.hasRaster(); Rectangle sourceRegion = param.getSourceRegion(); SampleModel sampleModel = null; ColorModel colorModel = null; compImageSize = 0; if (writeRaster) { inputRaster = image.getRaster(); sampleModel = inputRaster.getSampleModel(); colorModel = ImageUtil.createColorModel(null, sampleModel); if (sourceRegion == null) sourceRegion = inputRaster.getBounds(); else sourceRegion = sourceRegion.intersection(inputRaster.getBounds()); } else { input = image.getRenderedImage(); sampleModel = input.getSampleModel(); colorModel = input.getColorModel(); Rectangle rect = new Rectangle(input.getMinX(), input.getMinY(), input.getWidth(), input.getHeight()); if (sourceRegion == null) sourceRegion = rect; else sourceRegion = sourceRegion.intersection(rect); } IIOMetadata imageMetadata = image.getMetadata(); BMPMetadata bmpImageMetadata = null; if (imageMetadata != null && imageMetadata instanceof BMPMetadata) { bmpImageMetadata = (BMPMetadata)imageMetadata; } else { ImageTypeSpecifier imageType = new ImageTypeSpecifier(colorModel, sampleModel); bmpImageMetadata = (BMPMetadata)getDefaultImageMetadata(imageType, param); } if (sourceRegion.isEmpty()) throw new RuntimeException(I18N.getString("BMPImageWrite0")); int scaleX = param.getSourceXSubsampling(); int scaleY = param.getSourceYSubsampling(); int xOffset = param.getSubsamplingXOffset(); int yOffset = param.getSubsamplingYOffset(); // cache the data type; int dataType = sampleModel.getDataType(); sourceRegion.translate(xOffset, yOffset); sourceRegion.width -= xOffset; sourceRegion.height -= yOffset; int minX = sourceRegion.x / scaleX; int minY = sourceRegion.y / scaleY; w = (sourceRegion.width + scaleX - 1) / scaleX; h = (sourceRegion.height + scaleY - 1) / scaleY; xOffset = sourceRegion.x % scaleX; yOffset = sourceRegion.y % scaleY; Rectangle destinationRegion = new Rectangle(minX, minY, w, h); boolean noTransform = destinationRegion.equals(sourceRegion); // Raw data can only handle bytes, everything greater must be ASCII. int[] sourceBands = param.getSourceBands(); boolean noSubband = true; int numBands = sampleModel.getNumBands(); if (sourceBands != null) { sampleModel = sampleModel.createSubsetSampleModel(sourceBands); colorModel = null; noSubband = false; numBands = sampleModel.getNumBands(); } else { sourceBands = new int[numBands]; for (int i = 0; i < numBands; i++) sourceBands[i] = i; } int[] bandOffsets = null; boolean bgrOrder = true; if (sampleModel instanceof ComponentSampleModel) { bandOffsets = ((ComponentSampleModel)sampleModel).getBandOffsets(); if (sampleModel instanceof BandedSampleModel) { // for images with BandedSampleModel we can not work // with raster directly and must use writePixels() bgrOrder = false; } else { // we can work with raster directly only in case of // BGR component order. // In any other case we must use writePixels() for (int i = 0; i < bandOffsets.length; i++) { bgrOrder &= (bandOffsets[i] == (bandOffsets.length - i - 1)); } } } else { if (sampleModel instanceof SinglePixelPackedSampleModel) { // BugId 4892214: we can not work with raster directly // if image have different color order than RGB. // We should use writePixels() for such images. int[] bitOffsets = ((SinglePixelPackedSampleModel)sampleModel).getBitOffsets(); for (int i=0; i<bitOffsets.length-1; i++) { bgrOrder &= bitOffsets[i] > bitOffsets[i+1]; } } } if (bandOffsets == null) { // we will use getPixels() to extract pixel data for writePixels() // Please note that getPixels() provides rgb bands order. bandOffsets = new int[numBands]; for (int i = 0; i < numBands; i++) bandOffsets[i] = i; } noTransform &= bgrOrder; int sampleSize[] = sampleModel.getSampleSize(); //XXX: check more // Number of bytes that a scanline for the image written out will have. int destScanlineBytes = w * numBands; switch(bmpParam.getCompressionMode()) { case ImageWriteParam.MODE_EXPLICIT: compressionType = BMPCompressionTypes.getType(bmpParam.getCompressionType()); break; case ImageWriteParam.MODE_COPY_FROM_METADATA: compressionType = bmpImageMetadata.compression; break; case ImageWriteParam.MODE_DEFAULT: compressionType = getPreferredCompressionType(colorModel, sampleModel); break; default: // ImageWriteParam.MODE_DISABLED: compressionType = BI_RGB; } if (!canEncodeImage(compressionType, colorModel, sampleModel)) { throw new IOException("Image can not be encoded with compression type " + BMPCompressionTypes.getName(compressionType)); } byte r[] = null, g[] = null, b[] = null, a[] = null; if (compressionType == BI_BITFIELDS) { bitsPerPixel = DataBuffer.getDataTypeSize(sampleModel.getDataType()); if (bitsPerPixel != 16 && bitsPerPixel != 32) { // we should use 32bpp images in case of BI_BITFIELD // compression to avoid color conversion artefacts bitsPerPixel = 32; // Setting this flag to false ensures that generic // writePixels() will be used to store image data noTransform = false; } destScanlineBytes = w * bitsPerPixel + 7 >> 3; isPalette = true; paletteEntries = 3; r = new byte[paletteEntries]; g = new byte[paletteEntries]; b = new byte[paletteEntries]; a = new byte[paletteEntries]; int rmask = 0x00ff0000; int gmask = 0x0000ff00; int bmask = 0x000000ff; if (bitsPerPixel == 16) { /* NB: canEncodeImage() ensures we have image of * either USHORT_565_RGB or USHORT_555_RGB type here. * Technically, it should work for other direct color * model types but it might be non compatible with win98 * and friends. */ if (colorModel instanceof DirectColorModel) { DirectColorModel dcm = (DirectColorModel)colorModel; rmask = dcm.getRedMask(); gmask = dcm.getGreenMask(); bmask = dcm.getBlueMask(); } else { // it is unlikely, but if it happens, we should throw // an exception related to unsupported image format throw new IOException("Image can not be encoded with " + "compression type " + BMPCompressionTypes.getName(compressionType)); } } writeMaskToPalette(rmask, 0, r, g, b, a); writeMaskToPalette(gmask, 1, r, g, b, a); writeMaskToPalette(bmask, 2, r, g, b, a); if (!noTransform) { // prepare info for writePixels procedure bitMasks = new int[3]; bitMasks[0] = rmask; bitMasks[1] = gmask; bitMasks[2] = bmask; bitPos = new int[3]; bitPos[0] = firstLowBit(rmask); bitPos[1] = firstLowBit(gmask); bitPos[2] = firstLowBit(bmask); } if (colorModel instanceof IndexColorModel) { icm = (IndexColorModel)colorModel; } } else { // handle BI_RGB compression if (colorModel instanceof IndexColorModel) { isPalette = true; icm = (IndexColorModel)colorModel; paletteEntries = icm.getMapSize(); if (paletteEntries <= 2) { bitsPerPixel = 1; destScanlineBytes = w + 7 >> 3; } else if (paletteEntries <= 16) { bitsPerPixel = 4; destScanlineBytes = w + 1 >> 1; } else if (paletteEntries <= 256) { bitsPerPixel = 8; } else { // Cannot be written as a Palette image. So write out as // 24 bit image. bitsPerPixel = 24; isPalette = false; paletteEntries = 0; destScanlineBytes = w * 3; } if (isPalette == true) { r = new byte[paletteEntries]; g = new byte[paletteEntries]; b = new byte[paletteEntries]; a = new byte[paletteEntries]; icm.getAlphas(a); icm.getReds(r); icm.getGreens(g); icm.getBlues(b); } } else { // Grey scale images if (numBands == 1) { isPalette = true; paletteEntries = 256; bitsPerPixel = sampleSize[0]; destScanlineBytes = (w * bitsPerPixel + 7 >> 3); r = new byte[256]; g = new byte[256]; b = new byte[256]; a = new byte[256]; for (int i = 0; i < 256; i++) { r[i] = (byte)i; g[i] = (byte)i; b[i] = (byte)i; a[i] = (byte)255; } } else { if (sampleModel instanceof SinglePixelPackedSampleModel && noSubband) { /* NB: the actual pixel size can be smaller than * size of used DataBuffer element. * For example: in case of TYPE_INT_RGB actual pixel * size is 24 bits, but size of DataBuffere element * is 32 bits */ int[] sample_sizes = sampleModel.getSampleSize(); bitsPerPixel = 0; for (int size : sample_sizes) { bitsPerPixel += size; } bitsPerPixel = roundBpp(bitsPerPixel); if (bitsPerPixel != DataBuffer.getDataTypeSize(sampleModel.getDataType())) { noTransform = false; } destScanlineBytes = w * bitsPerPixel + 7 >> 3; } } } } // actual writing of image data int fileSize = 0; int offset = 0; int headerSize = 0; int imageSize = 0; int xPelsPerMeter = 0; int yPelsPerMeter = 0; int colorsUsed = 0; int colorsImportant = paletteEntries; // Calculate padding for each scanline int padding = destScanlineBytes % 4; if (padding != 0) { padding = 4 - padding; } // FileHeader is 14 bytes, BitmapHeader is 40 bytes, // add palette size and that is where the data will begin offset = 54 + paletteEntries * 4; imageSize = (destScanlineBytes + padding) * h; fileSize = imageSize + offset; headerSize = 40; long headPos = stream.getStreamPosition(); writeFileHeader(fileSize, offset); /* According to MSDN description, the top-down image layout * is allowed only if compression type is BI_RGB or BI_BITFIELDS. * Images with any other compression type must be wrote in the * bottom-up layout. */ if (compressionType == BI_RGB || compressionType == BI_BITFIELDS) { isTopDown = bmpParam.isTopDown(); } else { isTopDown = false; } writeInfoHeader(headerSize, bitsPerPixel); // compression stream.writeInt(compressionType); // imageSize stream.writeInt(imageSize); // xPelsPerMeter stream.writeInt(xPelsPerMeter); // yPelsPerMeter stream.writeInt(yPelsPerMeter); // Colors Used stream.writeInt(colorsUsed); // Colors Important stream.writeInt(colorsImportant); // palette if (isPalette == true) { // write palette if (compressionType == BI_BITFIELDS) { // write masks for red, green and blue components. for (int i=0; i<3; i++) { int mask = (a[i]&0xFF) + ((r[i]&0xFF)*0x100) + ((g[i]&0xFF)*0x10000) + ((b[i]&0xFF)*0x1000000); stream.writeInt(mask); } } else { for (int i=0; i<paletteEntries; i++) { stream.writeByte(b[i]); stream.writeByte(g[i]); stream.writeByte(r[i]); stream.writeByte(a[i]); } } } // Writing of actual image data int scanlineBytes = w * numBands; // Buffer for up to 8 rows of pixels int[] pixels = new int[scanlineBytes * scaleX]; // Also create a buffer to hold one line of the data // to be written to the file, so we can use array writes. bpixels = new byte[destScanlineBytes]; int l; if (compressionType == BI_JPEG || compressionType == BI_PNG) { // prepare embedded buffer embedded_stream = new ByteArrayOutputStream(); writeEmbedded(image, bmpParam); // update the file/image Size embedded_stream.flush(); imageSize = embedded_stream.size(); long endPos = stream.getStreamPosition(); fileSize = (int)(offset + imageSize); stream.seek(headPos); writeSize(fileSize, 2); stream.seek(headPos); writeSize(imageSize, 34); stream.seek(endPos); stream.write(embedded_stream.toByteArray()); embedded_stream = null; if (abortRequested()) { processWriteAborted(); } else { processImageComplete(); stream.flushBefore(stream.getStreamPosition()); } return; } int maxBandOffset = bandOffsets[0]; for (int i = 1; i < bandOffsets.length; i++) if (bandOffsets[i] > maxBandOffset) maxBandOffset = bandOffsets[i]; int[] pixel = new int[maxBandOffset + 1]; int destScanlineLength = destScanlineBytes; if (noTransform && noSubband) { destScanlineLength = destScanlineBytes / (DataBuffer.getDataTypeSize(dataType)>>3); } for (int i = 0; i < h; i++) { if (abortRequested()) { break; } int row = minY + i; if (!isTopDown) row = minY + h - i -1; // Get the pixels Raster src = inputRaster; Rectangle srcRect = new Rectangle(minX * scaleX + xOffset, row * scaleY + yOffset, (w - 1)* scaleX + 1, 1); if (!writeRaster) src = input.getData(srcRect); if (noTransform && noSubband) { SampleModel sm = src.getSampleModel(); int pos = 0; int startX = srcRect.x - src.getSampleModelTranslateX(); int startY = srcRect.y - src.getSampleModelTranslateY(); if (sm instanceof ComponentSampleModel) { ComponentSampleModel csm = (ComponentSampleModel)sm; pos = csm.getOffset(startX, startY, 0); for(int nb=1; nb < csm.getNumBands(); nb++) { if (pos > csm.getOffset(startX, startY, nb)) { pos = csm.getOffset(startX, startY, nb); } } } else if (sm instanceof MultiPixelPackedSampleModel) { MultiPixelPackedSampleModel mppsm = (MultiPixelPackedSampleModel)sm; pos = mppsm.getOffset(startX, startY); } else if (sm instanceof SinglePixelPackedSampleModel) { SinglePixelPackedSampleModel sppsm = (SinglePixelPackedSampleModel)sm; pos = sppsm.getOffset(startX, startY); } if (compressionType == BI_RGB || compressionType == BI_BITFIELDS){ switch(dataType) { case DataBuffer.TYPE_BYTE: byte[] bdata = ((DataBufferByte)src.getDataBuffer()).getData(); stream.write(bdata, pos, destScanlineLength); break; case DataBuffer.TYPE_SHORT: short[] sdata = ((DataBufferShort)src.getDataBuffer()).getData(); stream.writeShorts(sdata, pos, destScanlineLength); break; case DataBuffer.TYPE_USHORT: short[] usdata = ((DataBufferUShort)src.getDataBuffer()).getData(); stream.writeShorts(usdata, pos, destScanlineLength); break; case DataBuffer.TYPE_INT: int[] idata = ((DataBufferInt)src.getDataBuffer()).getData(); stream.writeInts(idata, pos, destScanlineLength); break; } for(int k=0; k<padding; k++) { stream.writeByte(0); } } else if (compressionType == BI_RLE4) { if (bpixels == null || bpixels.length < scanlineBytes) bpixels = new byte[scanlineBytes]; src.getPixels(srcRect.x, srcRect.y, srcRect.width, srcRect.height, pixels); for (int h=0; h<scanlineBytes; h++) { bpixels[h] = (byte)pixels[h]; } encodeRLE4(bpixels, scanlineBytes); } else if (compressionType == BI_RLE8) { //byte[] bdata = // ((DataBufferByte)src.getDataBuffer()).getData(); //System.out.println("bdata.length="+bdata.length); //System.arraycopy(bdata, pos, bpixels, 0, scanlineBytes); if (bpixels == null || bpixels.length < scanlineBytes) bpixels = new byte[scanlineBytes]; src.getPixels(srcRect.x, srcRect.y, srcRect.width, srcRect.height, pixels); for (int h=0; h<scanlineBytes; h++) { bpixels[h] = (byte)pixels[h]; } encodeRLE8(bpixels, scanlineBytes); } } else { src.getPixels(srcRect.x, srcRect.y, srcRect.width, srcRect.height, pixels); if (scaleX != 1 || maxBandOffset != numBands - 1) { for (int j = 0, k = 0, n=0; j < w; j++, k += scaleX * numBands, n += numBands) { System.arraycopy(pixels, k, pixel, 0, pixel.length); for (int m = 0; m < numBands; m++) { // pixel data is provided here in RGB order pixels[n + m] = pixel[sourceBands[m]]; } } } writePixels(0, scanlineBytes, bitsPerPixel, pixels, padding, numBands, icm); } processImageProgress(100.0f * (((float)i) / ((float)h))); } if (compressionType == BI_RLE4 || compressionType == BI_RLE8) { // Write the RLE EOF marker and stream.writeByte(0); stream.writeByte(1); incCompImageSize(2); // update the file/image Size imageSize = compImageSize; fileSize = compImageSize + offset; long endPos = stream.getStreamPosition(); stream.seek(headPos); writeSize(fileSize, 2); stream.seek(headPos); writeSize(imageSize, 34); stream.seek(endPos); } if (abortRequested()) { processWriteAborted(); } else { processImageComplete(); stream.flushBefore(stream.getStreamPosition()); } } private void writePixels(int l, int scanlineBytes, int bitsPerPixel, int pixels[], int padding, int numBands, IndexColorModel icm) throws IOException { int pixel = 0; int k = 0; switch (bitsPerPixel) { case 1: for (int j=0; j<scanlineBytes/8; j++) { bpixels[k++] = (byte)((pixels[l++] << 7) | (pixels[l++] << 6) | (pixels[l++] << 5) | (pixels[l++] << 4) | (pixels[l++] << 3) | (pixels[l++] << 2) | (pixels[l++] << 1) | pixels[l++]); } // Partially filled last byte, if any if (scanlineBytes%8 > 0) { pixel = 0; for (int j=0; j<scanlineBytes%8; j++) { pixel |= (pixels[l++] << (7 - j)); } bpixels[k++] = (byte)pixel; } stream.write(bpixels, 0, (scanlineBytes+7)/8); break; case 4: if (compressionType == BI_RLE4){ byte[] bipixels = new byte[scanlineBytes]; for (int h=0; h<scanlineBytes; h++) { bipixels[h] = (byte)pixels[l++]; } encodeRLE4(bipixels, scanlineBytes); }else { for (int j=0; j<scanlineBytes/2; j++) { pixel = (pixels[l++] << 4) | pixels[l++]; bpixels[k++] = (byte)pixel; } // Put the last pixel of odd-length lines in the 4 MSBs if ((scanlineBytes%2) == 1) { pixel = pixels[l] << 4; bpixels[k++] = (byte)pixel; } stream.write(bpixels, 0, (scanlineBytes+1)/2); } break; case 8: if(compressionType == BI_RLE8) { for (int h=0; h<scanlineBytes; h++) { bpixels[h] = (byte)pixels[l++]; } encodeRLE8(bpixels, scanlineBytes); }else { for (int j=0; j<scanlineBytes; j++) { bpixels[j] = (byte)pixels[l++]; } stream.write(bpixels, 0, scanlineBytes); } break; case 16: if (spixels == null) spixels = new short[scanlineBytes / numBands]; /* * We expect that pixel data comes in RGB order. * We will assemble short pixel taking into account * the compression type: * * BI_RGB - the RGB order should be maintained. * BI_BITFIELDS - use bitPos array that was built * according to bitfields masks. */ for (int j = 0, m = 0; j < scanlineBytes; m++) { spixels[m] = 0; if (compressionType == BI_RGB) { /* * please note that despite other cases, * the 16bpp BI_RGB requires the RGB data order */ spixels[m] = (short) (((0x1f & pixels[j ]) << 10) | ((0x1f & pixels[j + 1]) << 5) | ((0x1f & pixels[j + 2]) )); j += 3; } else { for(int i = 0 ; i < numBands; i++, j++) { spixels[m] |= (((pixels[j]) << bitPos[i]) & bitMasks[i]); } } } stream.writeShorts(spixels, 0, spixels.length); break; case 24: if (numBands == 3) { for (int j=0; j<scanlineBytes; j+=3) { // Since BMP needs BGR format bpixels[k++] = (byte)(pixels[l+2]); bpixels[k++] = (byte)(pixels[l+1]); bpixels[k++] = (byte)(pixels[l]); l+=3; } stream.write(bpixels, 0, scanlineBytes); } else { // Case where IndexColorModel had > 256 colors. int entries = icm.getMapSize(); byte r[] = new byte[entries]; byte g[] = new byte[entries]; byte b[] = new byte[entries]; icm.getReds(r); icm.getGreens(g); icm.getBlues(b); int index; for (int j=0; j<scanlineBytes; j++) { index = pixels[l]; bpixels[k++] = b[index]; bpixels[k++] = g[index]; bpixels[k++] = b[index]; l++; } stream.write(bpixels, 0, scanlineBytes*3); } break; case 32: if (ipixels == null) ipixels = new int[scanlineBytes / numBands]; if (numBands == 3) { /* * We expect that pixel data comes in RGB order. * We will assemble int pixel taking into account * the compression type. * * BI_RGB - the BGR order should be used. * BI_BITFIELDS - use bitPos array that was built * according to bitfields masks. */ for (int j = 0, m = 0; j < scanlineBytes; m++) { ipixels[m] = 0; if (compressionType == BI_RGB) { ipixels[m] = ((0xff & pixels[j + 2]) << 16) | ((0xff & pixels[j + 1]) << 8) | ((0xff & pixels[j ]) ); j += 3; } else { for(int i = 0 ; i < numBands; i++, j++) { ipixels[m] |= (((pixels[j]) << bitPos[i]) & bitMasks[i]); } } } } else { // We have two possibilities here: // 1. we are writing the indexed image with bitfields // compression (this covers also the case of BYTE_BINARY) // => use icm to get actual RGB color values. // 2. we are writing the gray-scaled image with BI_BITFIELDS // compression // => just replicate the level of gray to color components. for (int j = 0; j < scanlineBytes; j++) { if (icm != null) { ipixels[j] = icm.getRGB(pixels[j]); } else { ipixels[j] = pixels[j] << 16 | pixels[j] << 8 | pixels[j]; } } } stream.writeInts(ipixels, 0, ipixels.length); break; } // Write out the padding if (compressionType == BI_RGB || compressionType == BI_BITFIELDS) { for(k=0; k<padding; k++) { stream.writeByte(0); } } } private void encodeRLE8(byte[] bpixels, int scanlineBytes) throws IOException{ int runCount = 1, absVal = -1, j = -1; byte runVal = 0, nextVal =0 ; runVal = bpixels[++j]; byte[] absBuf = new byte[256]; while (j < scanlineBytes-1) { nextVal = bpixels[++j]; if (nextVal == runVal ){ if(absVal >= 3 ){ /// Check if there was an existing Absolute Run stream.writeByte(0); stream.writeByte(absVal); incCompImageSize(2); for(int a=0; a<absVal;a++){ stream.writeByte(absBuf[a]); incCompImageSize(1); } if (!isEven(absVal)){ //Padding stream.writeByte(0); incCompImageSize(1); } } else if(absVal > -1){ /// Absolute Encoding for less than 3 /// treated as regular encoding /// Do not include the last element since it will /// be inclued in the next encoding/run for (int b=0;b<absVal;b++){ stream.writeByte(1); stream.writeByte(absBuf[b]); incCompImageSize(2); } } absVal = -1; runCount++; if (runCount == 256){ /// Only 255 values permitted stream.writeByte(runCount-1); stream.writeByte(runVal); incCompImageSize(2); runCount = 1; } } else { if (runCount > 1){ /// If there was an existing run stream.writeByte(runCount); stream.writeByte(runVal); incCompImageSize(2); } else if (absVal < 0){ // First time.. absBuf[++absVal] = runVal; absBuf[++absVal] = nextVal; } else if (absVal < 254){ // 0-254 only absBuf[++absVal] = nextVal; } else { stream.writeByte(0); stream.writeByte(absVal+1); incCompImageSize(2); for(int a=0; a<=absVal;a++){ stream.writeByte(absBuf[a]); incCompImageSize(1); } // padding since 255 elts is not even stream.writeByte(0); incCompImageSize(1); absVal = -1; } runVal = nextVal; runCount = 1; } if (j == scanlineBytes-1){ // EOF scanline // Write the run if (absVal == -1){ stream.writeByte(runCount); stream.writeByte(runVal); incCompImageSize(2); runCount = 1; } else { // write the Absolute Run if(absVal >= 2){ stream.writeByte(0); stream.writeByte(absVal+1); incCompImageSize(2); for(int a=0; a<=absVal;a++){ stream.writeByte(absBuf[a]); incCompImageSize(1); } if (!isEven(absVal+1)){ //Padding stream.writeByte(0); incCompImageSize(1); } } else if(absVal > -1){ for (int b=0;b<=absVal;b++){ stream.writeByte(1); stream.writeByte(absBuf[b]); incCompImageSize(2); } } } /// EOF scanline stream.writeByte(0); stream.writeByte(0); incCompImageSize(2); } } } private void encodeRLE4(byte[] bipixels, int scanlineBytes) throws IOException { int runCount=2, absVal=-1, j=-1, pixel=0, q=0; byte runVal1=0, runVal2=0, nextVal1=0, nextVal2=0; byte[] absBuf = new byte[256]; runVal1 = bipixels[++j]; runVal2 = bipixels[++j]; while (j < scanlineBytes-2){ nextVal1 = bipixels[++j]; nextVal2 = bipixels[++j]; if (nextVal1 == runVal1 ) { //Check if there was an existing Absolute Run if(absVal >= 4){ stream.writeByte(0); stream.writeByte(absVal - 1); incCompImageSize(2); // we need to exclude last 2 elts, similarity of // which caused to enter this part of the code for(int a=0; a<absVal-2;a+=2){ pixel = (absBuf[a] << 4) | absBuf[a+1]; stream.writeByte((byte)pixel); incCompImageSize(1); } // if # of elts is odd - read the last element if(!(isEven(absVal-1))){ q = absBuf[absVal-2] << 4| 0; stream.writeByte(q); incCompImageSize(1); } // Padding to word align absolute encoding if ( !isEven((int)Math.ceil((absVal-1)/2)) ) { stream.writeByte(0); incCompImageSize(1); } } else if (absVal > -1){ stream.writeByte(2); pixel = (absBuf[0] << 4) | absBuf[1]; stream.writeByte(pixel); incCompImageSize(2); } absVal = -1; if (nextVal2 == runVal2){ // Even runlength runCount+=2; if(runCount == 256){ stream.writeByte(runCount-1); pixel = ( runVal1 << 4) | runVal2; stream.writeByte(pixel); incCompImageSize(2); runCount =2; if(j< scanlineBytes - 1){ runVal1 = runVal2; runVal2 = bipixels[++j]; } else { stream.writeByte(01); int r = runVal2 << 4 | 0; stream.writeByte(r); incCompImageSize(2); runCount = -1;/// Only EOF required now } } } else { // odd runlength and the run ends here // runCount wont be > 254 since 256/255 case will // be taken care of in above code. runCount++; pixel = ( runVal1 << 4) | runVal2; stream.writeByte(runCount); stream.writeByte(pixel); incCompImageSize(2); runCount = 2; runVal1 = nextVal2; // If end of scanline if (j < scanlineBytes -1){ runVal2 = bipixels[++j]; }else { stream.writeByte(01); int r = nextVal2 << 4 | 0; stream.writeByte(r); incCompImageSize(2); runCount = -1;/// Only EOF required now } } } else{ // Check for existing run if (runCount > 2){ pixel = ( runVal1 << 4) | runVal2; stream.writeByte(runCount); stream.writeByte(pixel); incCompImageSize(2); } else if (absVal < 0){ // first time absBuf[++absVal] = runVal1; absBuf[++absVal] = runVal2; absBuf[++absVal] = nextVal1; absBuf[++absVal] = nextVal2; } else if (absVal < 253){ // only 255 elements absBuf[++absVal] = nextVal1; absBuf[++absVal] = nextVal2; } else { stream.writeByte(0); stream.writeByte(absVal+1); incCompImageSize(2); for(int a=0; a<absVal;a+=2){ pixel = (absBuf[a] << 4) | absBuf[a+1]; stream.writeByte((byte)pixel); incCompImageSize(1); } // Padding for word align // since it will fit into 127 bytes stream.writeByte(0); incCompImageSize(1); absVal = -1; } runVal1 = nextVal1; runVal2 = nextVal2; runCount = 2; } // Handle the End of scanline for the last 2 4bits if (j >= scanlineBytes-2 ) { if (absVal == -1 && runCount >= 2){ if (j == scanlineBytes-2){ if(bipixels[++j] == runVal1){ runCount++; pixel = ( runVal1 << 4) | runVal2; stream.writeByte(runCount); stream.writeByte(pixel); incCompImageSize(2); } else { pixel = ( runVal1 << 4) | runVal2; stream.writeByte(runCount); stream.writeByte(pixel); stream.writeByte(01); pixel = bipixels[j]<<4 |0; stream.writeByte(pixel); int n = bipixels[j]<<4|0; incCompImageSize(4); } } else { stream.writeByte(runCount); pixel =( runVal1 << 4) | runVal2 ; stream.writeByte(pixel); incCompImageSize(2); } } else if(absVal > -1){ if (j == scanlineBytes-2){ absBuf[++absVal] = bipixels[++j]; } if (absVal >=2){ stream.writeByte(0); stream.writeByte(absVal+1); incCompImageSize(2); for(int a=0; a<absVal;a+=2){ pixel = (absBuf[a] << 4) | absBuf[a+1]; stream.writeByte((byte)pixel); incCompImageSize(1); } if(!(isEven(absVal+1))){ q = absBuf[absVal] << 4|0; stream.writeByte(q); incCompImageSize(1); } // Padding if ( !isEven((int)Math.ceil((absVal+1)/2)) ) { stream.writeByte(0); incCompImageSize(1); } } else { switch (absVal){ case 0: stream.writeByte(1); int n = absBuf[0]<<4 | 0; stream.writeByte(n); incCompImageSize(2); break; case 1: stream.writeByte(2); pixel = (absBuf[0] << 4) | absBuf[1]; stream.writeByte(pixel); incCompImageSize(2); break; } } } stream.writeByte(0); stream.writeByte(0); incCompImageSize(2); } } } private synchronized void incCompImageSize(int value){ compImageSize = compImageSize + value; } private boolean isEven(int number) { return (number%2 == 0 ? true : false); } private void writeFileHeader(int fileSize, int offset) throws IOException { // magic value stream.writeByte('B'); stream.writeByte('M'); // File size stream.writeInt(fileSize); // reserved1 and reserved2 stream.writeInt(0); // offset to image data stream.writeInt(offset); } private void writeInfoHeader(int headerSize, int bitsPerPixel) throws IOException { // size of header stream.writeInt(headerSize); // width stream.writeInt(w); // height stream.writeInt(isTopDown ? -h : h); // number of planes stream.writeShort(1); // Bits Per Pixel stream.writeShort(bitsPerPixel); } private void writeSize(int dword, int offset) throws IOException { stream.skipBytes(offset); stream.writeInt(dword); } public void reset() { super.reset(); stream = null; } private void writeEmbedded(IIOImage image, ImageWriteParam bmpParam) throws IOException { String format = compressionType == BI_JPEG ? "jpeg" : "png"; Iterator iterator = ImageIO.getImageWritersByFormatName(format); ImageWriter writer = null; if (iterator.hasNext()) writer = (ImageWriter)iterator.next(); if (writer != null) { if (embedded_stream == null) { throw new RuntimeException("No stream for writing embedded image!"); } writer.addIIOWriteProgressListener(new IIOWriteProgressAdapter() { public void imageProgress(ImageWriter source, float percentageDone) { processImageProgress(percentageDone); } }); writer.addIIOWriteWarningListener(new IIOWriteWarningListener() { public void warningOccurred(ImageWriter source, int imageIndex, String warning) { processWarningOccurred(imageIndex, warning); } }); writer.setOutput(ImageIO.createImageOutputStream(embedded_stream)); ImageWriteParam param = writer.getDefaultWriteParam(); //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()); writer.write(null, image, param); } else throw new RuntimeException(I18N.getString("BMPImageWrite5") + " " + format); } private int firstLowBit(int num) { int count = 0; while ((num & 1) == 0) { count++; num >>>= 1; } return count; } private class IIOWriteProgressAdapter implements IIOWriteProgressListener { public void imageComplete(ImageWriter source) { } public void imageProgress(ImageWriter source, float percentageDone) { } public void imageStarted(ImageWriter source, int imageIndex) { } public void thumbnailComplete(ImageWriter source) { } public void thumbnailProgress(ImageWriter source, float percentageDone) { } public void thumbnailStarted(ImageWriter source, int imageIndex, int thumbnailIndex) { } public void writeAborted(ImageWriter source) { } } /* * Returns preferred compression type for given image. * The default compression type is BI_RGB, but some image types can't be * encodeed with using default compression without cahnge color resolution. * For example, TYPE_USHORT_565_RGB may be encodeed only by using BI_BITFIELDS * compression type. * * NB: we probably need to extend this method if we encounter other image * types which can not be encoded with BI_RGB compression type. */ protected int getPreferredCompressionType(ColorModel cm, SampleModel sm) { ImageTypeSpecifier imageType = new ImageTypeSpecifier(cm, sm); return getPreferredCompressionType(imageType); } protected int getPreferredCompressionType(ImageTypeSpecifier imageType) { if (imageType.getBufferedImageType() == BufferedImage.TYPE_USHORT_565_RGB) { return BI_BITFIELDS; } return BI_RGB; } /* * Check whether we can encode image of given type using compression method in question. * * For example, TYPE_USHORT_565_RGB can be encodeed with BI_BITFIELDS compression only. * * NB: method should be extended if other cases when we can not encode * with given compression will be discovered. */ protected boolean canEncodeImage(int compression, ColorModel cm, SampleModel sm) { ImageTypeSpecifier imgType = new ImageTypeSpecifier(cm, sm); return canEncodeImage(compression, imgType); } protected boolean canEncodeImage(int compression, ImageTypeSpecifier imgType) { ImageWriterSpi spi = this.getOriginatingProvider(); if (!spi.canEncodeImage(imgType)) { return false; } int biType = imgType.getBufferedImageType(); int bpp = imgType.getColorModel().getPixelSize(); if (compressionType == BI_RLE4 && bpp != 4) { // only 4bpp images can be encoded as BI_RLE4 return false; } if (compressionType == BI_RLE8 && bpp != 8) { // only 8bpp images can be encoded as BI_RLE8 return false; } if (bpp == 16) { /* * Technically we expect that we may be able to * encode only some of SinglePixelPackedSampleModel * images here. * * In addition we should take into account following: * * 1. BI_RGB case, according to the MSDN description: * * The bitmap has a maximum of 2^16 colors. If the * biCompression member of the BITMAPINFOHEADER is BI_RGB, * the bmiColors member of BITMAPINFO is NULL. Each WORD * in the bitmap array represents a single pixel. The * relative intensities of red, green, and blue are * represented with five bits for each color component. * * 2. BI_BITFIELDS case, according ot the MSDN description: * * Windows 95/98/Me: When the biCompression member is * BI_BITFIELDS, the system supports only the following * 16bpp color masks: A 5-5-5 16-bit image, where the blue * mask is 0x001F, the green mask is 0x03E0, and the red mask * is 0x7C00; and a 5-6-5 16-bit image, where the blue mask * is 0x001F, the green mask is 0x07E0, and the red mask is * 0xF800. */ boolean canUseRGB = false; boolean canUseBITFIELDS = false; SampleModel sm = imgType.getSampleModel(); if (sm instanceof SinglePixelPackedSampleModel) { int[] sizes = ((SinglePixelPackedSampleModel)sm).getSampleSize(); canUseRGB = true; canUseBITFIELDS = true; for (int i = 0; i < sizes.length; i++) { canUseRGB &= (sizes[i] == 5); canUseBITFIELDS &= ((sizes[i] == 5) || (i == 1 && sizes[i] == 6)); } } return (((compressionType == BI_RGB) && canUseRGB) || ((compressionType == BI_BITFIELDS) && canUseBITFIELDS)); } return true; } protected void writeMaskToPalette(int mask, int i, byte[] r, byte[]g, byte[] b, byte[]a) { b[i] = (byte)(0xff & (mask >> 24)); g[i] = (byte)(0xff & (mask >> 16)); r[i] = (byte)(0xff & (mask >> 8)); a[i] = (byte)(0xff & mask); } private int roundBpp(int x) { if (x <= 8) { return 8; } else if (x <= 16) { return 16; } if (x <= 24) { return 24; } else { return 32; } } }