srecord GrabbableIntPixels(int[] data, int w, int h, int offset, int scanlineStride) {
  int[] asPackedArray() {
    if (offset == 0 && data.length == w*h) ret data;
    int[] pixels = new[w*h];
    for y to h:
      arrayCopy(data, offset+y*scanlineStride, pixels, y*h, w);
    ret pixels;
  }
}