[Piglit] [PATCH v3] fbo: test that swizzle doesn't affect mipmap generation

Brian Paul brianp at vmware.com
Tue Jun 17 06:29:01 PDT 2014

On 06/16/2014 08:45 PM, Robert Bragg wrote:
> This is a regression test for a mesa meta bug fix whereby a swizzle set
> via GL_ARB_texture_swizzle was being applied while iteratively
> generating a mipmap. This meant the swizzle would be applied twice by
> the time the application sampled those generated layers.
> The bug was originally noticed with code that used a swizzle to emulate
> a component alpha texture via a component red texture. In this case the
> texture internally only had one component and applying the swizzle
> effectively discarded that component. The test follows a similar
> pattern, but swizzles from red to green instead of to alpha.
> Reviewed-by: Brian Paul <brianp at vmware.com>
> ---
>   tests/all.py                           |   1 +
>   tests/fbo/CMakeLists.gl.txt            |   1 +
>   tests/fbo/fbo-generatemipmap-swizzle.c | 165 +++++++++++++++++++++++++++++++++
>   3 files changed, 167 insertions(+)
>   create mode 100644 tests/fbo/fbo-generatemipmap-swizzle.c



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