/**
* Overridden to call the {@link #computeSample(int, int, Sample[], WritableSample) computeSample}
* method for every pixel in the given tile's rectangle.
*
* @param targetBand The target band.
* @param targetTile The current tile associated with the target band to be computed.
* @param pm A progress monitor which should be used to determine computation cancelation
* requests.
* @throws OperatorException
*/
@Override
public final void computeTile(Band targetBand, Tile targetTile, ProgressMonitor pm)
throws OperatorException {
final Rectangle targetRectangle = targetTile.getRectangle();
final Point location = new Point();
final Sample[] sourceSamples = createSourceSamples(targetRectangle, location);
final Sample sourceMaskSamples = createSourceMaskSamples(targetRectangle, location);
final WritableSample targetSample = createTargetSample(targetTile, location);
final int x1 = targetTile.getMinX();
final int y1 = targetTile.getMinY();
final int x2 = targetTile.getMaxX();
final int y2 = targetTile.getMaxY();
try {
pm.beginTask(getId(), targetTile.getHeight());
if (sourceMaskSamples != null) {
for (location.y = y1; location.y <= y2; location.y++) {
for (location.x = x1; location.x <= x2; location.x++) {
if (sourceMaskSamples.getBoolean()) {
computeSample(location.x, location.y, sourceSamples, targetSample);
} else {
setInvalid(targetSample);
}
}
pm.worked(1);
}
} else {
for (location.y = y1; location.y <= y2; location.y++) {
for (location.x = x1; location.x <= x2; location.x++) {
computeSample(location.x, location.y, sourceSamples, targetSample);
}
pm.worked(1);
}
}
} finally {
pm.done();
}
}
public TileIndex(final Tile tile) {
tileOffset = tile.getScanlineOffset();
tileStride = tile.getScanlineStride();
tileMinX = tile.getMinX();
tileMinY = tile.getMinY();
}