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Gert Wollny authored
Use caps to obtain the multisample sample positions for up to 16 positions and implement the according Gallium interface. This implemenation (plus its counterpart in virglrenderer) assume that the fixed sample position are always the same for a given number of samples over the whole live time of a qemu session. It also assumes that sample series are only given for 2, 4, 8, and 16 samples, and for intermediate numbers N of samples the next higher supported set from above list is picked and the sample positions for the first N samples are returned accordingly. Fixes (when run on GL host): dEQP-GLES31.functional.texture.multisample.samples_1.sample_position dEQP-GLES31.functional.texture.multisample.samples_2.sample_position dEQP-GLES31.functional.texture.multisample.samples_3.sample_position dEQP-GLES31.functional.texture.multisample.samples_4.sample_position dEQP-GLES31.functional.texture.multisample.samples_8.sample_position dEQP-GLES31.functional.texture.multisample.samples_10.sample_position dEQP-GLES31.functional.texture.multisample.samples_12.sample_position dEQP-GLES31.functional.texture.multisample.samples_13.sample_position dEQP-GLES31.functional.texture.multisample.samples_16.sample_position v2: remove unrelated chunk (thanks Ilia Mirkin) v3: - also return positions for intermediate sample counts - fix unused varible warning - update description v4: explain better what this patch assumes and how it handles sample numbers that are not directly advertised (thanks go to Erik Faye-Lund for making me aware that this should be documented) Signed-off-by: Gert Wollny <gert.wollny@collabora.com> Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
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