pub fn compute_downsample_depth_pyramid(slab: &mut [u32], global_id: UVec3)Expand description
Downsample from DepthPyramidDescriptor::mip_level-1 into
DepthPyramidDescriptor::mip_level.
It is assumed that a DepthPyramidDescriptor is stored at index 0 in
the given slab.
The DepthPyramidDescriptor’s mip_level field will point to that of the
mip level being downsampled to (the mip level being written into).
This shader should be called in a loop from from 1..mip_count.