private static ByteInterleavedRaster normalizeRaster(ByteInterleavedRaster raster) {
boolean reallocBuffer = false;
int scanLineStride = raster.getScanlineStride();
int dataOffsets[] = raster.getDataOffsets();
for (int i = 0; i < dataOffsets.length; i++)
if (dataOffsets[i] != i) {
reallocBuffer = true;
break;
}
int bands = raster.getNumBands();
if (!reallocBuffer
&& (raster.getPixelStride() != bands || scanLineStride != raster.getWidth() * bands))
reallocBuffer = true;
if (reallocBuffer) {
PixelInterleavedSampleModel sm = (PixelInterleavedSampleModel) raster.getSampleModel();
PixelInterleavedSampleModel newSM =
new PixelInterleavedSampleModel(
sm.getDataType(),
raster.getWidth(),
raster.getHeight(),
bands,
bands * raster.getWidth(),
bands == 1 ? new int[] {0} : new int[] {0, 1, 2});
ByteInterleavedRaster newRaster =
new ByteInterleavedRaster(newSM, new Point(raster.getMinX(), raster.getMinY()));
Functions.copyData(newRaster, raster);
raster = newRaster;
}
return raster;
}
public void doTransform(ByteInterleavedRaster input, ByteInterleavedRaster output) {
if (cmsTransform != null) {
ByteInterleavedRaster ri = normalizeRaster(input);
ByteInterleavedRaster ro;
int outBands = output.getNumBands();
if (!input.getBounds().equals(output.getBounds())) {
int[] offsets = outBands == 1 ? new int[] {0} : new int[] {0, 1, 2};
SampleModel sm =
new PixelInterleavedSampleModel(
DataBuffer.TYPE_BYTE,
ri.getWidth(),
ri.getHeight(),
outBands,
outBands * ri.getWidth(),
offsets);
ro = new ByteInterleavedRaster(sm, new Point(ri.getMinX(), ri.getMinY()));
} else ro = normalizeRaster(output);
int pixels =
outBands == 1 ? ro.getDataStorage().length : ro.getDataStorage().length / outBands;
cmsDoTransform(cmsTransform.handle, ri.getDataStorage(), ro.getDataStorage(), pixels);
if (ro != output) Functions.copyData(output, ro);
}
}