[Piglit] [PATCH] ARB_explicit_uniform_location: test overlap location with unused uniform

[Anuj Phogat]

On Mon, Mar 17, 2014 at 6:05 AM, Tapani Pälli <tapani.palli at intel.com> wrote:
> This test tests overlapping uniform locations across shader stages
> against unused uniform.
>
> Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
> ---
>  .../unused-uniform-reserve-location.shader_test    | 34 ++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>  create mode 100644 tests/spec/arb_explicit_uniform_location/linker/unused-uniform-reserve-location.shader_test
>
> diff --git a/tests/spec/arb_explicit_uniform_location/linker/unused-uniform-reserve-location.shader_test b/tests/spec/arb_explicit_uniform_location/linker/unused-uniform-reserve-location.shader_test
> new file mode 100644
> index 0000000..2489e4e
> --- /dev/null
> +++ b/tests/spec/arb_explicit_uniform_location/linker/unused-uniform-reserve-location.shader_test
> @@ -0,0 +1,34 @@
> +#
> +# Tests overlapping uniform location among 2 shader stages, both shaders
> +# define same explicit location. This test tests specifically the overlap
> +# with unused uniform. Uniform 'array' gets optimized away because it is
> +# not used but it needs to consume specified 128 locations.
> +#
> +# The GL_ARB_explicit_uniform_location spec says:
> +#     "No two default-block uniform variables in the program can have the
> +#     same location, even if they are unused, otherwise a compiler or linker
> +#     error will be generated."
> +
> +[require]
> +GLSL >= 1.20
> +GL_ARB_explicit_uniform_location
> +
> +[vertex shader]
> +#extension GL_ARB_explicit_uniform_location: require
> +layout(location = 0) uniform float array[128];
> +vec4 vertex;
> +void main()
> +{
> +  gl_Position = vertex;
> +}
> +
> +[fragment shader]
> +#extension GL_ARB_explicit_uniform_location: require
> +layout(location = 127) uniform vec4 color;
> +void main()
> +{
> +  gl_FragColor = color;
> +}
> +
> +[test]
> +link error
> --
> 1.8.3.1
>
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Reviewed-by: Anuj Phogat <anuj.phogat at gmail.com>