[Piglit] [PATCH] arb_compute_variable_group_size: check gl_GlobalInvocationID

[Nicolai Hähnle]

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>

On 21.10.2017 21:21, Ilia Mirkin wrote:
> An implementation bug in mesa caused these values to be computed
> incorrectly. Make sure that they work as defined.
> 
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
>   .../execution/global-invocation-id.shader_test     | 44 ++++++++++++++++++++++
>   1 file changed, 44 insertions(+)
>   create mode 100644 tests/spec/arb_compute_variable_group_size/execution/global-invocation-id.shader_test
> 
> diff --git a/tests/spec/arb_compute_variable_group_size/execution/global-invocation-id.shader_test b/tests/spec/arb_compute_variable_group_size/execution/global-invocation-id.shader_test
> new file mode 100644
> index 000000000..24f2f1d05
> --- /dev/null
> +++ b/tests/spec/arb_compute_variable_group_size/execution/global-invocation-id.shader_test
> @@ -0,0 +1,44 @@
> +# Simple test that verifies gl_GlobalInvocationID derived values are
> +# computed properly.
> +
> +[require]
> +GL >= 3.3
> +GLSL >= 3.30
> +GL_ARB_compute_shader
> +GL_ARB_compute_variable_group_size
> +GL_ARB_shader_storage_buffer_object
> +
> +[compute shader]
> +#version 330
> +#extension GL_ARB_compute_shader: require
> +#extension GL_ARB_compute_variable_group_size: require
> +#extension GL_ARB_shader_storage_buffer_object: require
> +
> +layout(local_size_variable) in;
> +
> +layout(std430)
> +buffer SSBO {
> +       uvec2 id[4];
> +};
> +
> +void main()
> +{
> +	uint g = gl_GlobalInvocationID.x;
> +	uint l = gl_LocalInvocationID.x;
> +	uint t = gl_WorkGroupID.x * gl_LocalGroupSizeARB.x + gl_LocalInvocationID.x;
> +	id[t] = uvec2(g, l);
> +}
> +
> +[test]
> +ssbo 0 32
> +
> +compute group size 2 1 1 2 1 1
> +
> +probe ssbo uint 0  0 == 0
> +probe ssbo uint 0  4 == 0
> +probe ssbo uint 0  8 == 1
> +probe ssbo uint 0 12 == 1
> +probe ssbo uint 0 16 == 2
> +probe ssbo uint 0 20 == 0
> +probe ssbo uint 0 24 == 3
> +probe ssbo uint 0 28 == 1
> 


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