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 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());
}
}