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;
}
