v3dv: handle copies from/to compressed formats
Since we don't support rendering to compressed formats, we implement this
by using a compatible format with the same bpp as the compressed format.
However, we need to take into account that the underlying compressed image
bpp is computed for a full block, so when we specify regions on the
compressed image, we need to divide offsets and dimensions by the block
size.
This works well for anything that copies to a compressed format using
the TLB, but it doesn't specifically address copies from compressed
formats to other compatible images. These go through the blit path
and require to copy by blitting (texturing) from the compressed format
to another format. In this case, we choose a comptible format with
the per-texel bpp (not the block bpp) of the compressed format so it
matches the setup for the blit operation.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
2 files changed
