[Piglit] [PATCH 06/10] arb_tessellation_shader: add tests to exercise gl_PrimitiveID

[Ilia Mirkin]

Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>

On Mon, Jul 27, 2015 at 8:02 PM, Marek Olšák <maraeo at gmail.com> wrote:
> From: Chris Forbes <chrisf at ijw.co.nz>
>
> v2: fixed by Marek
>
> Reviewed-by: Marek Olšák <marek.olsak at amd.com>
> ---
>  .../execution/tcs-primitiveid.shader_test          | 72 ++++++++++++++++++++++
>  .../execution/tes-primitiveid.shader_test          | 68 ++++++++++++++++++++
>  2 files changed, 140 insertions(+)
>  create mode 100644 tests/spec/arb_tessellation_shader/execution/tcs-primitiveid.shader_test
>  create mode 100644 tests/spec/arb_tessellation_shader/execution/tes-primitiveid.shader_test
>
> diff --git a/tests/spec/arb_tessellation_shader/execution/tcs-primitiveid.shader_test b/tests/spec/arb_tessellation_shader/execution/tcs-primitiveid.shader_test
> new file mode 100644
> index 0000000..0aea046
> --- /dev/null
> +++ b/tests/spec/arb_tessellation_shader/execution/tcs-primitiveid.shader_test
> @@ -0,0 +1,72 @@
> +# Test the gl_PrimitiveID input in the TCS.
> +
> +[require]
> +GLSL >= 1.50
> +GL_ARB_tessellation_shader
> +GL_ARB_shader_atomic_counters
> +
> +[vertex shader]
> +#version 150
> +
> +out int id;
> +
> +void main()
> +{
> +       id = gl_VertexID;
> +}
> +
> +[tessellation control shader]
> +#version 150
> +#extension GL_ARB_tessellation_shader : require
> +#extension GL_ARB_shader_atomic_counters: require
> +
> +layout(vertices = 4) out;
> +in int id[];
> +
> +layout(binding=0) uniform atomic_uint matches;
> +layout(binding=0, offset=4) uniform atomic_uint mismatches;
> +
> +void main()
> +{
> +       /* we have single-vertex patches. primitive id == vertex id */
> +       if (id[0] == gl_PrimitiveID)
> +               atomicCounterIncrement(matches);
> +       else
> +               atomicCounterIncrement(mismatches);
> +
> +       /* cull the patch */
> +       gl_TessLevelInner[0] = 0.0;
> +       gl_TessLevelInner[1] = 0.0;
> +
> +       gl_TessLevelOuter[0] = 0.0;
> +       gl_TessLevelOuter[1] = 0.0;
> +       gl_TessLevelOuter[2] = 0.0;
> +       gl_TessLevelOuter[3] = 0.0;
> +}
> +
> +[tessellation evaluation shader]
> +#version 150
> +#extension GL_ARB_tessellation_shader : require
> +
> +layout(quads, equal_spacing) in;
> +
> +void main()
> +{
> +       gl_Position = vec4(0);
> +}
> +
> +[fragment shader]
> +#version 150
> +
> +void main()
> +{
> +       gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
> +}
> +
> +[test]
> +atomic counters 2
> +patch parameter vertices 1
> +draw arrays GL_PATCHES 0 4
> +
> +probe atomic counter 0 == 16
> +probe atomic counter 1 == 0
> diff --git a/tests/spec/arb_tessellation_shader/execution/tes-primitiveid.shader_test b/tests/spec/arb_tessellation_shader/execution/tes-primitiveid.shader_test
> new file mode 100644
> index 0000000..2ff96d3
> --- /dev/null
> +++ b/tests/spec/arb_tessellation_shader/execution/tes-primitiveid.shader_test
> @@ -0,0 +1,68 @@
> +# Test the gl_PrimitiveID input in the TES.
> +
> +[require]
> +GLSL >= 1.50
> +GL_ARB_tessellation_shader
> +GL_ARB_shader_atomic_counters
> +
> +[vertex shader passthrough]
> +
> +[tessellation control shader]
> +#version 150
> +#extension GL_ARB_tessellation_shader : require
> +
> +layout(vertices = 1) out;
> +patch out int id;
> +
> +void main()
> +{
> +       id = gl_PrimitiveID;
> +
> +       gl_TessLevelInner[0] = 1.0;
> +       gl_TessLevelInner[1] = 1.0;
> +
> +       gl_TessLevelOuter[0] = 1.0;
> +       gl_TessLevelOuter[1] = 1.0;
> +       gl_TessLevelOuter[2] = 1.0;
> +       gl_TessLevelOuter[3] = 1.0;
> +}
> +
> +[tessellation evaluation shader]
> +#version 150
> +#extension GL_ARB_tessellation_shader : require
> +#extension GL_ARB_shader_atomic_counters: require
> +
> +layout(quads, equal_spacing) in;
> +patch in int id;
> +
> +layout(binding=0) uniform atomic_uint matches;
> +layout(binding=0, offset=4) uniform atomic_uint mismatches;
> +
> +void main()
> +{
> +       gl_Position = vec4(0);
> +
> +       /* primitive ID observed in TES should be the same as in TCS */
> +       if (id == gl_PrimitiveID)
> +               atomicCounterIncrement(matches);
> +       else
> +               atomicCounterIncrement(mismatches);
> +
> +}
> +
> +[fragment shader]
> +#version 150
> +
> +void main()
> +{
> +       gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
> +}
> +
> +[test]
> +atomic counters 2
> +patch parameter vertices 1
> +draw arrays GL_PATCHES 0 4
> +
> +probe atomic counter 0 == 16
> +probe atomic counter 1 == 0
> +
> --
> 2.1.4
>
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