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# Test that TCS per-vertex outputs which are used only in
# TCS stage are not converted to local variables
# and indeed share data within the patch.
[require]
GLSL >= 1.50
GL_ARB_tessellation_shader
GL_ARB_separate_shader_objects
GL_ARB_shader_atomic_counters
INT GL_MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS >= 1
[vertex shader passthrough]
[tessellation control shader]
#extension GL_ARB_tessellation_shader: require
#extension GL_ARB_separate_shader_objects: require
#extension GL_ARB_shader_atomic_counters: require
layout(vertices = 3) out;
layout(location = 0) out vec4 out_unused_in_tes[];
layout(binding = 0) uniform atomic_uint mismatches;
void main()
{
out_unused_in_tes[gl_InvocationID] = gl_in[gl_InvocationID].gl_Position;
barrier();
if (out_unused_in_tes[0] != gl_in[0].gl_Position ||
out_unused_in_tes[1] != gl_in[1].gl_Position ||
out_unused_in_tes[2] != gl_in[2].gl_Position) {
atomicCounterIncrement(mismatches);
}
}
[tessellation evaluation shader]
#extension GL_ARB_tessellation_shader: require
layout(triangles) in;
void main()
{
gl_Position = vec4(0);
}
[fragment shader]
void main()
{
gl_FragColor = vec4(1.0);
}
[vertex data]
piglit_vertex/float/4
1 1 1 1
2 2 2 2
3 3 3 3
[test]
atomic counters 1
patch parameter vertices 3
draw arrays GL_PATCHES 0 3
probe atomic counter 0 == 0
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