[Mesa-dev] [PATCH] i965: Use GL_RED for DEPTH_TEXTURE_MODE in ES 3.0 for unsized formats.

[Kenneth Graunke]

On 01/23/2013 10:28 PM, Ian Romanick wrote:
> On 01/23/2013 06:27 PM, Kenneth Graunke wrote:
>> Khronos has apparently decided that depth textures with sized formats
>> (allowed with ARB_internalformat_query or ES 3.0) should be treated as
>> GL_RED, while unsized formats (an existing feature) should be treated
>> as GL_INTENSITY for compatibility with ES 2.0.
>>
>> Ian is proposing changes to ARB_internalformat_query which will make
>> this actually legal and consistent.
>>
>> A similar problem exists with GL 4.2, but we're going to ignore that
>> for the time being.
>>
>> Tested on Ivybridge: no Piglit regressions; fixes 4 es3conform tests:
>> - depth_texture_fbo
>> - depth_texture_fbo_clear
>> - depth_texture_teximage
>> - depth_texture_texsubimage
>>
>> Cc: Ian Romanick <idr at freedesktop.org>
>
> We probably could have done this in core Mesa, but I think this is okay
> for now.  I pushed a version of this patch with my R-b to the gles3 branch.

Yeah, I was going to make a core Mesa helper function until I realized 
it was so little code.