/**
* Gets pixel data of an <code>IIOImage</code> object.
*
* @param image an <code>IIOImage</code> object
* @return a byte buffer of pixel data
* @throws Exception
*/
public static ByteBuffer getImageByteBuffer(IIOImage image) throws IOException {
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
if (writer == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(outputStream);
writer.setOutput(ios);
writer.write(
streamMetadata, new IIOImage(image.getRenderedImage(), null, null), tiffWriteParam);
// writer.write(image.getRenderedImage());
writer.dispose();
// ImageIO.write(image.getRenderedImage(), "tiff", ios); // this can be used in lieu of
// writer
ios.seek(0);
BufferedImage bi = ImageIO.read(ios);
return convertImageData(bi);
}
/**
* Creates a list of TIFF image files from an image file. It basically converts images of other
* formats to TIFF format, or a multi-page TIFF image to multiple TIFF image files.
*
* @param imageFile input image file
* @param index an index of the page; -1 means all pages, as in a multi-page TIFF image
* @return a list of TIFF image files
* @throws Exception
*/
public static List<File> createTiffFiles(File imageFile, int index) throws IOException {
List<File> tiffFiles = new ArrayList<File>();
String imageFileName = imageFile.getName();
String imageFormat = imageFileName.substring(imageFileName.lastIndexOf('.') + 1);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
ImageReader reader = readers.next();
if (reader == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
ImageInputStream iis = ImageIO.createImageInputStream(imageFile);
reader.setInput(iis);
// Read the stream metadata
// IIOMetadata streamMetadata = reader.getStreamMetadata();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
// Read the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
int imageTotal = reader.getNumImages(true);
for (int i = 0; i < imageTotal; i++) {
// all if index == -1; otherwise, only index-th
if (index == -1 || i == index) {
// BufferedImage bi = reader.read(i);
// IIOImage oimage = new IIOImage(bi, null, reader.getImageMetadata(i));
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
writer.setOutput(ios);
writer.write(streamMetadata, oimage, tiffWriteParam);
ios.close();
tiffFiles.add(tiffFile);
}
}
writer.dispose();
reader.dispose();
return tiffFiles;
}
public static List<File> createTiffFiles(List<IIOImage> imageList, int index, int dpiX, int dpiY)
throws IOException {
List<File> tiffFiles = new ArrayList<File>();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
if (writer == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
// all if index == -1; otherwise, only index-th
for (IIOImage oimage : (index == -1 ? imageList : imageList.subList(index, index + 1))) {
if (dpiX != 0 && dpiY != 0) {
// Get the default image metadata.
ImageTypeSpecifier imageType =
ImageTypeSpecifier.createFromRenderedImage(oimage.getRenderedImage());
IIOMetadata imageMetadata = writer.getDefaultImageMetadata(imageType, null);
imageMetadata = setDPIViaAPI(imageMetadata, dpiX, dpiY);
oimage.setMetadata(imageMetadata);
}
File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
writer.setOutput(ios);
writer.write(streamMetadata, oimage, tiffWriteParam);
ios.close();
tiffFiles.add(tiffFile);
}
writer.dispose();
return tiffFiles;
}
/**
* Merges multiple images into one TIFF image.
*
* @param inputImages an array of image files
* @param outputTiff the output TIFF file
* @throws Exception
*/
public static void mergeTiff(File[] inputImages, File outputTiff) throws IOException {
List<IIOImage> imageList = new ArrayList<IIOImage>();
for (int i = 0; i < inputImages.length; i++) {
imageList.addAll(getIIOImageList(inputImages[i]));
}
if (imageList.isEmpty()) {
// if no image
return;
}
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
ImageOutputStream ios = ImageIO.createImageOutputStream(outputTiff);
writer.setOutput(ios);
IIOImage firstIioImage = imageList.remove(0);
writer.write(streamMetadata, firstIioImage, tiffWriteParam);
int i = 1;
for (IIOImage iioImage : imageList) {
writer.writeInsert(i++, iioImage, tiffWriteParam);
}
ios.close();
writer.dispose();
}
public void prepareWriteSequence(IIOMetadata streamMetadata) throws IOException {
ImageOutputStream out = (ImageOutputStream) getOutput();
out.setByteOrder(ByteOrder.LITTLE_ENDIAN);
out.writeShort(0x00004949); // 0: II = intel = little endian
out.writeShort(42); // 2: version, magic value
ifdptr = out.getStreamPosition(); // save position (4): write here later the offset to first ifd
// (ifd linked list)
out.writeInt(0); // 4: offset first Image File Directory
// 8: header size
}
private IFD writeYCbCrImage(
ImageOutputStream out, BufferedImage image, int comp, TIFFImageWriteParam param)
throws IOException {
image = convert(image, BufferedImage.TYPE_INT_RGB);
try {
int width = image.getWidth();
int height = image.getHeight();
IFD ifd = new IFD(); // entries need to be in tag order !
int ss = (param == null) ? 0x22 : param.getSubSampling();
int ssh = (ss >> 4) & 0x0F;
int ssv = ss & 0x0F;
if (ssh
< ssv) { // YCbCrSubsampleVert shall always be less than or equal to YCbCrSubsampleHoriz.
throw new IOException(
"Internal error: YCbCrSubsampleVert is not less than YCbCrSubsampleHoriz.");
}
// int ww=((width +ssh-1)/ssh)*ssh; // [1] p.92
// int hh=((height+ssv-1)/ssv)*ssv;
int ww = width;
int hh = height;
ifd.add(new DEFactory.NewSubfileTypeDE(2)); // 254 single page of multipage file
ifd.add(new DEFactory.ImageWidthDE(ww)); // 256
ifd.add(new DEFactory.ImageLengthDE(hh)); // 257
DEFactory.BitsPerSampleDE bpss = new DEFactory.BitsPerSampleDE(3);
bpss.setBitsPerSample(0, 8); // Y
bpss.setBitsPerSample(1, 8); // Cb
bpss.setBitsPerSample(2, 8); // Cr
ifd.add(bpss); // 258
ifd.add(new DEFactory.CompressionDE(comp)); // 259
ifd.add(new DEFactory.PhotometricInterpretationDE(YCbCr)); // 262
int maxrps, maxstripes; // max RowsPerStrip
if ((1 << 13) <= width) {
maxrps = 1;
maxstripes = height; // one row per strip
} else {
maxrps = (1 << 13) / width;
maxstripes = (height + maxrps - 1) / maxrps;
}
if (comp == JPEG) {
maxrps = ((maxrps + 8 * ssv - 1) / (8 * ssv)) * (8 * ssv);
maxstripes = (height + maxrps - 1) / maxrps;
}
DEFactory.StripOffsetsDE offsets = new DEFactory.StripOffsetsDE(maxstripes);
ifd.add(offsets); // 273
ifd.add(new DEFactory.SamplesPerPixelDE(3)); // 277
ifd.add(new DEFactory.RowsPerStripDE(maxrps)); // 278
DEFactory.StripByteCountsDE counts = new DEFactory.StripByteCountsDE(maxstripes);
ifd.add(counts); // 279
if (param == null) {
ifd.add(new DEFactory.XResolutionDE(72.0)); // 282
ifd.add(new DEFactory.YResolutionDE(72.0)); // 283
} else {
ifd.add(new DEFactory.XResolutionDE(param.getXResolution())); // 282
ifd.add(new DEFactory.YResolutionDE(param.getYResolution())); // 283
}
ifd.add(new DEFactory.ResolutionUnitDE(Inch)); // 296
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream os = baos;
JPEGOutputStream jpegos = null;
if (comp == JPEG) {
jpegos = new JPEGOutputStream(baos);
int quality = (param == null) ? 50 : (int) (param.getCompressionQuality() * 100);
jpegos.setZZQuantizationTable(0, JPEGConstants.LQT, quality);
jpegos.setZZQuantizationTable(1, JPEGConstants.CQT, quality);
jpegos.setRawDCHuffmanTable(0, JPEGConstants.HLDCTable);
jpegos.setRawACHuffmanTable(0, JPEGConstants.HLACTable);
jpegos.setRawDCHuffmanTable(1, JPEGConstants.HCDCTable);
jpegos.setRawACHuffmanTable(1, JPEGConstants.HCACTable);
jpegos.defineQuantizationTables();
jpegos.defineHuffmanTables();
jpegos.close();
DEFactory.JPEGTablesDE jpegtables = new DEFactory.JPEGTablesDE(baos.toByteArray());
ifd.add(jpegtables); // 347
baos.reset();
os = jpegos;
}
// CCIR Recommendation 601-1 LumaRed=299/1000 LumaGreen=587/1000 LumeBlue=114/1000
// Y = ( LumaRed * R + LumaGreen * G + LumaBlue * B )
// Cb = ( B - Y ) / ( 2 - 2 * LumaBlue )
// Cr = ( R - Y ) / ( 2 - 2 * LumaRed )
double LumaRed = 299.0 / 1000.0;
double LumaGreen = 587.0 / 1000.0;
double LumaBlue = 114.0 / 1000.0;
DEFactory.YCbCrCoefficientsDE YCbCrCoeff = new DEFactory.YCbCrCoefficientsDE();
YCbCrCoeff.setLumaRed(LumaRed); // Y
YCbCrCoeff.setLumaGreen(LumaGreen); // Cb
YCbCrCoeff.setLumaBlue(LumaBlue); // Cr
ifd.add(YCbCrCoeff); // 529
DEFactory.YCbCrSubSamplingDE YCbCrSubSampling = new DEFactory.YCbCrSubSamplingDE();
YCbCrSubSampling.setHoriz(ssh);
YCbCrSubSampling.setVert(ssv);
ifd.add(YCbCrSubSampling); // 530
double RfBY = 0;
double RfWY = 255;
double RfBCb = 128;
double RfWCb = 255;
double RfBCr = 128;
double RfWCr = 255;
DEFactory.ReferenceBlackWhiteDE ReferenceBlackWhite = new DEFactory.ReferenceBlackWhiteDE();
ReferenceBlackWhite.setY(RfBY, RfWY);
ReferenceBlackWhite.setCb(RfBCb, RfWCb);
ReferenceBlackWhite.setCr(RfBCr, RfWCr);
ifd.add(ReferenceBlackWhite); // 532
TIFFYCbCrOutputStream ycbcros;
if (jpegos == null) {
ycbcros = new TIFFYCbCrOutputStream(os, width, ssv, ssh);
os = new TIFFSubSamplingOutputStream(ycbcros, width, ssv, ssh);
} else {
ycbcros = new TIFFYCbCrOutputStream(os, width, 1, 1); // jpeg does own subsampling
os = ycbcros;
}
ycbcros.setPositioning(1);
ycbcros.setColourCoefficients(LumaRed, LumaGreen, LumaBlue);
ycbcros.setRfBWY(RfBY, RfWY);
ycbcros.setRfBWCb(RfBCb, RfWCb);
ycbcros.setRfBWCr(RfBCr, RfWCr);
WritableRaster raster = image.getRaster();
DataBufferInt buffer = (DataBufferInt) raster.getDataBuffer();
int[] imgdata = (int[]) buffer.getData();
int c = 0, index = 0;
for (int y = 0; y < height; y += maxrps) {
if ((height - y) < maxrps) {
maxrps = height - y;
}
if (jpegos != null) {
jpegos.startOfImage();
int[] hv = {(ssh << 4) | ssv, 0x11, 0x11}; // (Hi<<4)|Vi
int[] q = {0, 1, 1}; // quantization table Y=0, Cb=Cr=1
// jpegos.startOfFrame(((maxrps+ssv-1)/ssv)*ssv,ww,hv,q);
jpegos.startOfFrame(maxrps, ww, hv, q);
int[] sel = {0, 1, 1}; // DC,AC code table Y=0, Cb=Cr=1
jpegos.startOfScan(sel);
}
for (int i = 0; i < maxrps; i++) {
int x = 0;
while (x < width) {
c = imgdata[x + (y + i) * width];
// c = image.getRGB(x,y+i);
os.write((c >> 16) & 0x000000FF);
os.write((c >> 8) & 0x000000FF);
os.write(c & 0x000000FF);
x++;
}
while (x < ww) {
os.write((c >> 16) & 0x000000FF);
os.write((c >> 8) & 0x000000FF);
os.write(c & 0x000000FF);
x++;
}
}
os.close();
byte[] data = baos.toByteArray();
counts.setCount(index, data.length); // update ifd strip counter array
offsets.setOffset(index, out.getStreamPosition()); // update ifd image data offset array
out.write(data); // write to image stream
baos.reset();
index++;
}
return ifd;
} catch (Exception e) {
e.printStackTrace();
throw new IOException(getClass().getName() + ".writeYCbCrImage:\n\t" + e.getMessage());
}
}
private IFD writeCMYKImage(ImageOutputStream out, BufferedImage image, TIFFImageWriteParam param)
throws IOException {
try {
int width = image.getWidth();
int height = image.getHeight();
IFD ifd = new IFD(); // entries need to be in tag order !
ifd.add(new DEFactory.NewSubfileTypeDE(2)); // 254 single page of multipage file
ifd.add(new DEFactory.ImageWidthDE(width)); // 256
ifd.add(new DEFactory.ImageLengthDE(height)); // 257
DEFactory.BitsPerSampleDE bpss = new DEFactory.BitsPerSampleDE(4);
bpss.setBitsPerSample(0, 8); // cyan
bpss.setBitsPerSample(1, 8); // magneta
bpss.setBitsPerSample(2, 8); // yellow
bpss.setBitsPerSample(3, 8); // key (black)
ifd.add(bpss); // 258
ifd.add(new DEFactory.CompressionDE(NOCOMPRESSION)); // 259
ifd.add(new DEFactory.PhotometricInterpretationDE(CMYK)); // 262
int maxrps, maxstripes; // max RowsPerStrip
if ((1 << 13) <= width) {
maxrps = 1;
maxstripes = height; // one row per strip
} else {
maxrps = (1 << 13) / width;
maxstripes = (height + maxrps - 1) / maxrps;
}
DEFactory.StripOffsetsDE offsets = new DEFactory.StripOffsetsDE(maxstripes);
ifd.add(offsets); // 273
ifd.add(new DEFactory.SamplesPerPixelDE(4)); // 277
ifd.add(new DEFactory.RowsPerStripDE(maxrps)); // 278
DEFactory.StripByteCountsDE counts = new DEFactory.StripByteCountsDE(maxstripes);
ifd.add(counts); // 279
if (param == null) {
ifd.add(new DEFactory.XResolutionDE(72.0)); // 282
ifd.add(new DEFactory.YResolutionDE(72.0)); // 283
} else {
ifd.add(new DEFactory.XResolutionDE(param.getXResolution())); // 282
ifd.add(new DEFactory.YResolutionDE(param.getYResolution())); // 283
}
ifd.add(new DEFactory.ResolutionUnitDE(Inch)); // 296
int index = 0;
for (int y = 0; y < height; y += maxrps) {
/*
Assume rgb image.
Each strip: evaluate c m y k colour
save in byte array
write to image file
*/
ByteArrayOutputStream baos = new ByteArrayOutputStream();
for (int i = 0; i < maxrps; i++) {
if ((y + i) == height) {
break;
} // last strip might have less rows
for (int x = 0; x < width; x++) {
int c = image.getRGB(x, y + i);
int R = (c >> 16) & 0x00FF;
int G = (c >> 8) & 0x00FF;
int B = (c) & 0x00FF;
if ((R == 255) && (G == 255) && (B == 255)) {
baos.write(0);
baos.write(0);
baos.write(0);
baos.write(0);
} else {
double C = 1.0 - R / 255.0;
double M = 1.0 - G / 255.0;
double Y = 1.0 - B / 255.0;
double K = C;
if (M < K) {
K = M;
}
if (Y < K) {
K = Y;
}
C = ((C - K) / (1.0 - K)) * 255.0;
M = ((M - K) / (1.0 - K)) * 255.0;
Y = ((Y - K) / (1.0 - K)) * 255.0;
K *= 255.0;
baos.write((int) C);
baos.write((int) M);
baos.write((int) Y);
baos.write((int) K);
}
}
}
baos.close();
byte[] data = baos.toByteArray();
counts.setCount(index, data.length); // update ifd strip counter array
offsets.setOffset(index, out.getStreamPosition()); // update ifd image data offset array
out.write(data); // write to image stream
index++;
}
return ifd;
} catch (Exception e) {
e.printStackTrace();
throw new IOException(getClass().getName() + ".writeCMYKImage:\n\t" + e.getMessage());
}
}
private IFD writeRGBImage(
ImageOutputStream out, BufferedImage image, int comp, TIFFImageWriteParam param)
throws IOException {
image = convert(image, BufferedImage.TYPE_INT_RGB);
try {
int width = image.getWidth();
int height = image.getHeight();
IFD ifd = new IFD(); // entries need to be in tag order !
ifd.add(new DEFactory.NewSubfileTypeDE(2)); // 254 single page of multipage file
ifd.add(new DEFactory.ImageWidthDE(width)); // 256
ifd.add(new DEFactory.ImageLengthDE(height)); // 257
DEFactory.BitsPerSampleDE bpss = new DEFactory.BitsPerSampleDE(3);
bpss.setBitsPerSample(0, 8); // red
bpss.setBitsPerSample(1, 8); // green
bpss.setBitsPerSample(2, 8); // blue
ifd.add(bpss); // 258
ifd.add(new DEFactory.CompressionDE(comp)); // 259
ifd.add(new DEFactory.PhotometricInterpretationDE(RGB)); // 262
int maxrps, maxstripes; // max RowsPerStrip
if ((1 << 13) <= width) {
maxrps = 1;
maxstripes = height; // one row per strip
} else {
maxrps = (1 << 13) / width;
maxstripes = (height + maxrps - 1) / maxrps;
}
if (comp == JPEG) {
maxrps = ((maxrps + 8 - 1) / 8) * 8;
maxstripes = (height + maxrps - 1) / maxrps;
}
DEFactory.StripOffsetsDE offsets = new DEFactory.StripOffsetsDE(maxstripes);
ifd.add(offsets); // 273
ifd.add(new DEFactory.SamplesPerPixelDE(3)); // 277
ifd.add(new DEFactory.RowsPerStripDE(maxrps)); // 278
DEFactory.StripByteCountsDE counts = new DEFactory.StripByteCountsDE(maxstripes);
ifd.add(counts); // 279
if (param == null) {
ifd.add(new DEFactory.XResolutionDE(72.0)); // 282
ifd.add(new DEFactory.YResolutionDE(72.0)); // 283
} else {
ifd.add(new DEFactory.XResolutionDE(param.getXResolution())); // 282
ifd.add(new DEFactory.YResolutionDE(param.getYResolution())); // 283
}
ifd.add(new DEFactory.ResolutionUnitDE(Inch)); // 296
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream os = baos;
JPEGOutputStream jpegos = null;
if (comp == JPEG) { // add JPEGTables tag
jpegos = new JPEGOutputStream(baos);
int quality = (param == null) ? 50 : (int) (param.getCompressionQuality() * 100);
jpegos.setZZQuantizationTable(0, JPEGConstants.LQT, quality);
jpegos.setRawDCHuffmanTable(0, JPEGConstants.HLDCTable);
jpegos.setRawACHuffmanTable(0, JPEGConstants.HLACTable);
jpegos.defineQuantizationTables();
jpegos.defineHuffmanTables();
jpegos.close();
DEFactory.JPEGTablesDE jpegtables = new DEFactory.JPEGTablesDE(baos.toByteArray());
ifd.add(jpegtables); // 347
baos.reset();
os = jpegos;
}
WritableRaster raster = image.getRaster();
DataBufferInt buffer = (DataBufferInt) raster.getDataBuffer();
int[] imgdata = (int[]) buffer.getData();
int index = 0;
for (int y = 0; y < height; y += maxrps) {
/*
Assume rgb image.
Each strip: evaluate r g b colour
save in byte array
write to image file
*/
if ((height - y) < maxrps) {
maxrps = height - y;
}
if (jpegos != null) { // jpeg: SOI,SOF,SOS marker
jpegos.startOfImage();
int[] hv = {0x11, 0x11, 0x11}; // (Hi<<4)|Vi
int[] q = {0, 0, 0}; // quantization table 0
jpegos.startOfFrame(maxrps, width, hv, q);
int[] sel = {0, 0, 0}; // DC,AC code table 0
jpegos.startOfScan(sel);
}
for (int i = 0; i < maxrps; i++) { // write RGB data
for (int x = 0; x < width; x++) {
int c = imgdata[x + (y + i) * width];
os.write((c >> 16) & 0x000000FF);
os.write((c >> 8) & 0x000000FF);
os.write(c & 0x000000FF);
}
}
os.close(); // jpeg: EOI marker
byte[] data = baos.toByteArray();
counts.setCount(index, data.length); // update ifd strip counter array
offsets.setOffset(index, out.getStreamPosition()); // update ifd image data offset array
out.write(data); // write to image stream
baos.reset();
index++;
}
return ifd;
} catch (Exception e) {
e.printStackTrace();
throw new IOException(getClass().getName() + ".writeRGBImage:\n\t" + e.getMessage());
}
}
private IFD writeBModHufImage(
ImageOutputStream out, BufferedImage image, TIFFImageWriteParam param) throws IOException {
try {
int width = image.getWidth();
int height = image.getHeight();
IFD ifd = new IFD(); // entries need to be in tag order !
ifd.add(new DEFactory.NewSubfileTypeDE(2)); // 254 single page of multipage file
ifd.add(new DEFactory.ImageWidthDE(width)); // 256
ifd.add(new DEFactory.ImageLengthDE(height)); // 257
ifd.add(new DEFactory.CompressionDE(CCITTGROUP3MODHUFFMAN)); // 259
ifd.add(new DEFactory.PhotometricInterpretationDE(WhiteIsZero)); // 262
int maxrps, maxstripes; // max RowsPerStrip
if ((1 << 13) <= width) {
maxrps = 1;
maxstripes = height; // one row per stripe
} else {
maxrps = (1 << 13) / width;
maxstripes = (height + maxrps - 1) / maxrps;
}
DEFactory.StripOffsetsDE offsets = new DEFactory.StripOffsetsDE(maxstripes);
ifd.add(offsets); // 273
ifd.add(new DEFactory.RowsPerStripDE(maxrps)); // 278
DEFactory.StripByteCountsDE counts = new DEFactory.StripByteCountsDE(maxstripes);
ifd.add(counts); // 279
if (param == null) {
ifd.add(new DEFactory.XResolutionDE(72.0)); // 282
ifd.add(new DEFactory.YResolutionDE(72.0)); // 283
} else {
ifd.add(new DEFactory.XResolutionDE(param.getXResolution())); // 282
ifd.add(new DEFactory.YResolutionDE(param.getYResolution())); // 283
}
ifd.add(new DEFactory.ResolutionUnitDE(Inch)); // 296
int index = 0;
for (int y = 0; y < height; y += maxrps) {
/*
Assume bilevel image (black/white[=-1])
Each strip: count run length
encode into modified hufman codes
swap bits
save in byte array
write to image file
*/
ByteArrayOutputStream baos = new ByteArrayOutputStream();
BitSwapOutputStream bsos = new BitSwapOutputStream(baos);
ModHuffmanOutputStream mhos = new ModHuffmanOutputStream(bsos);
RLEOutputStream rlos =
new RLEOutputStream(mhos, 3); // rgb = 3 bytes per sample code word (not needed here)
for (int i = 0; i < maxrps; i++) {
if ((y + i) == height) {
break;
} // last strip might have less rows
rlos.setStartCodeWord(-1); // white run first
for (int x = 0; x < width; x++) {
rlos.write(image.getRGB(x, y + i));
}
rlos.flush(); // write padding after ever image row
}
rlos.close();
byte[] data = baos.toByteArray();
counts.setCount(index, data.length); // update ifd strip counter array
offsets.setOffset(index, out.getStreamPosition()); // update ifd image data offset array
out.write(data); // write to image stream
index++;
}
return ifd;
} catch (Exception e) {
e.printStackTrace();
throw new IOException(getClass().getName() + ".writeBModHufImage:\n\t" + e.getMessage());
}
}