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Brian Paul authored
For software drivers where we want "fake" msaa support for GL 3.x, we treat 1 sample as being msaa. For drivers with real msaa support, start format probing at 2x msaa. For drivers with fake msaa support, start format probing at 1x msaa. This also tweaks the MaxSamples code in st_init_extensions() so that we use MaxSamples=1 for fake msaa. This allows the format proble loops to run at least one iteration. This fixes a llvmpipe/VTK regression from commit 6839d336. And for drivers with fake msaa support, calls such as glTexImage2DMultisample(samples=1) will now succeed. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102038 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102125 Reviewed-by: Roland Scheidegger <sroland@vmware.com>
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