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Rob Clark authored
Add a new helper that drivers can use to emulate various things that need special handling in particular in transfer_map: 1) z32_s8x24.. gl/gallium treats this as a single buffer with depth and stencil interleaved but hardware frequently treats this as separate z32 and s8 buffers. Special pack/unpack handling is needed in transfer_map/unmap to pack/unpack the exposed buffer 2) fake RGTC.. GPUs designed with GLES in mind, but which can other- wise do GL3, if native RGTC is not supported it can be emulated by converting to uncompressed internally, but needs pack/unpack in transfer_map/unmap 3) MSAA resolves in the transfer_map() case v2: add MSAA resolve based on Eric's "gallium: Add helpers for MSAA resolves in pipe_transfer_map()/unmap()." patch; avoid wrapping pipe_resource, to make it possible for drivers to use both this and threaded_context. Signed-off-by: Rob Clark <robdclark@gmail.com>
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