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Ilia Mirkin authored
The additional provision of GL_OES_copy_image is that it work for ETC. However many desktop GPUs don't have native ETC support, so st/mesa does the decoding by hand. Instead of discarding the compressed data, keep it around in CPU memory. Use it when performing image copies. Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Acked-by: Marek Olšák <marek.olsak@amd.com>
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