[Mesa-dev] [PATCH v4 3/4] st/mesa: Add support for ARB_post_depth_coverage

[Lyude]

Changes since v3:
- Add logic to the GL plumbing to implicitly enable early_fragment_tests
  for the fragment shader when post_depth_coverage is enabled.

Signed-off-by: Lyude <lyude at redhat.com>
---
 src/mesa/state_tracker/st_extensions.c     | 1 +
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index f3db702..7674156 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -600,6 +600,7 @@ void st_init_extensions(struct pipe_screen *screen,
       { o(ARB_occlusion_query2),             PIPE_CAP_OCCLUSION_QUERY                  },
       { o(ARB_pipeline_statistics_query),    PIPE_CAP_QUERY_PIPELINE_STATISTICS        },
       { o(ARB_point_sprite),                 PIPE_CAP_POINT_SPRITE                     },
+      { o(ARB_post_depth_coverage),          PIPE_CAP_POST_DEPTH_COVERAGE              },
       { o(ARB_query_buffer_object),          PIPE_CAP_QUERY_BUFFER_OBJECT              },
       { o(ARB_robust_buffer_access_behavior), PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR   },
       { o(ARB_sample_shading),               PIPE_CAP_SAMPLE_SHADING                   },
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 76cd4dc..ea95857 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -6376,9 +6376,14 @@ st_translate_program(
    }
 
    if (procType == PIPE_SHADER_FRAGMENT) {
-      if (program->shader->Program->info.fs.early_fragment_tests)
+      if (program->shader->Program->info.fs.early_fragment_tests ||
+          program->shader->Program->info.fs.post_depth_coverage) {
          ureg_property(ureg, TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL, 1);
 
+         if (program->shader->Program->info.fs.post_depth_coverage)
+            ureg_property(ureg, TGSI_PROPERTY_FS_POST_DEPTH_COVERAGE, 1);
+      }
+
       if (proginfo->info.inputs_read & VARYING_BIT_POS) {
           /* Must do this after setting up t->inputs. */
           emit_wpos(st_context(ctx), t, proginfo, ureg,
-- 
2.9.4