/**
* Performs median filtering on a specified rectangle. The sources are cobbled.
*
* @param sources an array of source Rasters, guaranteed to provide all necessary source data for
* computing the output.
* @param dest a WritableRaster tile containing the area to be computed.
* @param destRect the rectangle within dest to be processed.
*/
protected void computeRect(Raster[] sources, WritableRaster dest, Rectangle destRect) {
Raster source = sources[0];
Rectangle srcRect = mapDestRect(destRect, 0);
int formatTag = MediaLibAccessor.findCompatibleTag(sources, dest);
MediaLibAccessor srcAccessor = new MediaLibAccessor(source, srcRect, formatTag);
MediaLibAccessor dstAccessor = new MediaLibAccessor(dest, destRect, formatTag);
int numBands = getSampleModel().getNumBands();
int cmask = (1 << numBands) - 1;
mediaLibImage[] srcML = srcAccessor.getMediaLibImages();
mediaLibImage[] dstML = dstAccessor.getMediaLibImages();
for (int i = 0; i < dstML.length; i++) {
switch (dstAccessor.getDataType()) {
case DataBuffer.TYPE_BYTE:
case DataBuffer.TYPE_USHORT:
case DataBuffer.TYPE_SHORT:
case DataBuffer.TYPE_INT:
if (maskSize == 3) {
// Call appropriate Medialib accelerated function
Image.MinFilter3x3(dstML[i], srcML[i]);
} else if (maskSize == 5) {
// Call appropriate Medialib accelerated function
Image.MinFilter5x5(dstML[i], srcML[i]);
} else if (maskSize == 7) {
// Call appropriate Medialib accelerated function
Image.MinFilter7x7(dstML[i], srcML[i]);
}
break;
case DataBuffer.TYPE_FLOAT:
case DataBuffer.TYPE_DOUBLE:
if (maskSize == 3) {
// Call appropriate Medialib accelerated function
Image.MinFilter3x3_Fp(dstML[i], srcML[i]);
} else if (maskSize == 5) {
// Call appropriate Medialib accelerated function
Image.MinFilter5x5_Fp(dstML[i], srcML[i]);
} else if (maskSize == 7) {
// Call appropriate Medialib accelerated function
Image.MinFilter7x7_Fp(dstML[i], srcML[i]);
}
break;
default:
String className = this.getClass().getName();
throw new RuntimeException(JaiI18N.getString("Generic2"));
}
}
if (dstAccessor.isDataCopy()) {
dstAccessor.copyDataToRaster();
}
}
