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mesa: Add GL/GLSL plumbing for ARB_fragment_shader_interlock.

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This extension provides new GLSL built-in functions
beginInvocationInterlockARB() and endInvocationInterlockARB()
that delimit a critical section of fragment shader code. For
pairs of shader invocations with "overlapping" coverage in a
given pixel, the OpenGL implementation will guarantee that the
critical section of the fragment shader will be executed for
only one fragment at a time.

Signed-off-by: Plamena Manolova <plamena.manolova@intel.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Plamena Manolova
2018-04-27 14:12:30 +01:00
parent 53719f818c
commit 60e843c4d5
14 changed files with 197 additions and 1 deletions
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13
src/compiler/glsl/glsl_parser_extras.cpp
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@@ -299,6 +299,10 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
this->fs_early_fragment_tests = false;
this->fs_inner_coverage = false;
this->fs_post_depth_coverage = false;
this->fs_pixel_interlock_ordered = false;
this->fs_pixel_interlock_unordered = false;
this->fs_sample_interlock_ordered = false;
this->fs_sample_interlock_unordered = false;
this->fs_blend_support = 0;
memset(this->atomic_counter_offsets, 0,
sizeof(this->atomic_counter_offsets));
@@ -630,6 +634,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
EXT(ARB_explicit_uniform_location),
EXT(ARB_fragment_coord_conventions),
EXT(ARB_fragment_layer_viewport),
EXT(ARB_fragment_shader_interlock),
EXT(ARB_gpu_shader5),
EXT(ARB_gpu_shader_fp64),
EXT(ARB_gpu_shader_int64),
@@ -1721,6 +1726,10 @@ set_shader_inout_layout(struct gl_shader *shader,
assert(!state->fs_early_fragment_tests);
assert(!state->fs_inner_coverage);
assert(!state->fs_post_depth_coverage);
assert(!state->fs_pixel_interlock_ordered);
assert(!state->fs_pixel_interlock_unordered);
assert(!state->fs_sample_interlock_ordered);
assert(!state->fs_sample_interlock_unordered);
}
for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
@@ -1842,6 +1851,10 @@ set_shader_inout_layout(struct gl_shader *shader,
shader->EarlyFragmentTests = state->fs_early_fragment_tests;
shader->InnerCoverage = state->fs_inner_coverage;
shader->PostDepthCoverage = state->fs_post_depth_coverage;
shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
shader->BlendSupport = state->fs_blend_support;
break;