public Raster getRaster(int x, int y, int w, int h) {
WritableRaster rast = cm.createCompatibleWritableRaster(w, h);
int[] buf = rast.getDataBuffer();
int c = x * dy - y * dx - delta;
int cx = dy;
int cy = -w * dy - dx;
int k = 0;
if (cyclic) {
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
buf[k++] = table[(c >> 8) & LOOKUP_MASK];
c += cx;
}
c += cy;
}
} else {
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
int index = c >> 8;
buf[k++] = index < 0 ? c1 : index >= LOOKUP_SIZE ? c2 : table[index];
c += cx;
}
c += cy;
}
}
return rast;
}
