[Piglit] [PATCH v2 10/10] arb_enhanced_layouts: add xfb_offset overlap test

[Timothy Arceri]

Reviewed-by: Timothy Arceri <tarceri at itsqueeze.com>

On 7/2/19 2:52 am, Andres Gomez wrote:
>  From the GL_ARB_enhanced_layouts spec:
> 
>    " No aliasing in output buffers is allowed: It is a compile-time or
>      link-time error to specify variables with overlapping transform
>      feedback offsets."
> 
> v2: added forgotten check_link.
> 
> Cc: Timothy Arceri <tarceri at itsqueeze.com>
> Signed-off-by: Andres Gomez <agomez at igalia.com>
> ---
>   .../xfb_offset/invalid-overlap.vert           | 24 +++++++++++++++++++
>   1 file changed, 24 insertions(+)
>   create mode 100644 tests/spec/arb_enhanced_layouts/compiler/transform-feedback-layout-qualifiers/xfb_offset/invalid-overlap.vert
> 
> diff --git a/tests/spec/arb_enhanced_layouts/compiler/transform-feedback-layout-qualifiers/xfb_offset/invalid-overlap.vert b/tests/spec/arb_enhanced_layouts/compiler/transform-feedback-layout-qualifiers/xfb_offset/invalid-overlap.vert
> new file mode 100644
> index 000000000..5e8adc154
> --- /dev/null
> +++ b/tests/spec/arb_enhanced_layouts/compiler/transform-feedback-layout-qualifiers/xfb_offset/invalid-overlap.vert
> @@ -0,0 +1,24 @@
> +// [config]
> +// expect_result: fail
> +// glsl_version: 1.40
> +// check_link: true
> +// require_extensions: GL_ARB_enhanced_layouts
> +// [end config]
> +//
> +// From the GL_ARB_enhanced_layouts spec:
> +//
> +//   " No aliasing in output buffers is allowed: It is a compile-time
> +//     or link-time error to specify variables with overlapping
> +//     transform feedback offsets."
> +
> +#version 140
> +#extension GL_ARB_enhanced_layouts: require
> +
> +layout(xfb_offset = 0) out vec4 a;
> +layout(xfb_offset = 0) out vec4 b;
> +
> +void main()
> +{
> +  a = vec4(1.0);
> +  b = vec4(0.0);
> +}
>