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Added workaround for 32 bit RAW format in Java < 6

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This commit is contained in:
Harald Kuhr 2009-10-06 23:03:19 +02:00
parent 96b65bc902
commit 608df15066
1 changed files with 48 additions and 11 deletions
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53
twelvemonkeys-imageio/pict/src/main/java/com/twelvemonkeys/imageio/plugins/pict/QTRAWDecompressor.java Executable file → Normal file
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@ -56,32 +56,69 @@ final class QTRAWDecompressor extends QTDecompressor {
}
public BufferedImage decompress(final QuickTime.ImageDesc pDescription, final InputStream pStream) throws IOException {
DataInputStream stream = new DataInputStream(pStream);
byte[] data = new byte[pDescription.dataSize];
DataInputStream stream = new DataInputStream(pStream);
try {
stream.readFully(data, 0, pDescription.dataSize);
}
finally {
stream.close();
}
DataBuffer buffer = new DataBufferByte(data, data.length);
WritableRaster raster;
// TODO: Depth parameter can be 1-32 (color) or 33-40 (gray scale)
switch (pDescription.depth) {
case 24:
raster = Raster.createInterleavedRaster(buffer, pDescription.width, pDescription.height, pDescription.width * 3, 3, new int[] {0, 1, 2}, null);
case 40: // 8 bit gray (untested)
raster = Raster.createInterleavedRaster(
buffer,
pDescription.width, pDescription.height,
pDescription.width, 1,
new int[] {0},
null
);
break;
case 32:
raster = Raster.createInterleavedRaster(buffer, pDescription.width, pDescription.height, pDescription.width * 4, 4, new int[] {1, 2, 3, 0}, null);
case 24: // 24 bit RGB
raster = Raster.createInterleavedRaster(
buffer,
pDescription.width, pDescription.height,
pDescription.width * 3, 3,
new int[] {0, 1, 2},
null
);
break;
case 32: // 32 bit RGBA
// WORKAROUND: There is a bug in the way Java 2D interprets the band offsets before Java 6.
// So, instead of passing a correct offset array below, we swap channel 1 & 3...
for (int y = 0; y < pDescription.height; y++) {
for (int x = 0; x < pDescription.width; x++) {
int offset = 4 * y * pDescription.width + x * 4;
byte temp = data[offset + 1];
data[offset + 1] = data[offset + 3];
data[offset + 3] = temp;
}
}
raster = Raster.createInterleavedRaster(
buffer,
pDescription.width, pDescription.height,
pDescription.width * 4, 4,
new int[] {3, 2, 1, 0}, // B & R mixed up. {1, 2, 3, 0} is correct
null
);
break;
default:
throw new IIOException("Unsupported RAW depth: " + pDescription.depth);
}
ColorModel cm = new ComponentColorModel(
ColorSpace.getInstance(ColorSpace.CS_sRGB),
pDescription.depth <= 32 ? ColorSpace.getInstance(ColorSpace.CS_sRGB) : ColorSpace.getInstance(ColorSpace.CS_GRAY),
pDescription.depth == 32,
false,
Transparency.TRANSLUCENT,
pDescription.depth == 32 ? Transparency.TRANSLUCENT : Transparency.OPAQUE,
DataBuffer.TYPE_BYTE
);