mesa: GL_ARB_texture_storage_multisample is not optional with GL_ARB_texture_multisample
In Mesa, this extension is implemented purely in software. Drivers may
*optionally* provide optimized paths. If a driver enables,
GL_ARB_texture_multisample, it gets GL_ARB_texture_storage_multisample
for free.
NOTE: This has the side effect of enabling the extension in Gallium
drivers that enable GL_ARB_texture_multisample.
v2 (Ken): Still prevent multisample texture targets in TexParameter for
implementations that don't support multisampling.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Brian Paul <brianp@vmware.com>