// Search individual samples up to the beginning of
// the next first level mip map block
const uint64_t final_index = min(end,
pow2_ceil(index, MipMapScalePower));
for (; index < final_index &&
// Search individual samples up to the beginning of
// the next first level mip map block
const uint64_t final_index = min(end,
pow2_ceil(index, MipMapScalePower));
for (; index < final_index &&