This extension allows the fragment shader to control whether values in
gl_SampleMaskIn[] reflect the coverage after application of the early
depth and stencil tests.
Signed-off-by: Plamena Manolova <plamena.manol...@intel.com>
---
src/compiler/glsl/ast.h | 5 +++++
src/compiler/glsl/ast_to_hir.cpp | 5 +++++
src/compiler/glsl/ast_type.cpp | 8 +++++++-
src/compiler/glsl/glsl_parser.yy | 11 +++++++++++
src/compiler/glsl/glsl_parser_extras.cpp | 4 ++++
src/compiler/glsl/glsl_parser_extras.h | 4 ++++
src/compiler/glsl/linker.cpp | 4 ++++
src/compiler/shader_info.h | 1 +
src/mesa/main/extensions_table.h | 1 +
src/mesa/main/mtypes.h | 2 ++
src/mesa/main/shaderapi.c | 1 +
11 files changed, 45 insertions(+), 1 deletion(-)
diff --git a/src/compiler/glsl/ast.h b/src/compiler/glsl/ast.h
index 55f9a6c..ad19493 100644
--- a/src/compiler/glsl/ast.h
+++ b/src/compiler/glsl/ast.h
@@ -606,6 +606,11 @@ struct ast_type_qualifier {
/** \{ */
unsigned blend_support:1; /**< Are there any blend_support_
qualifiers */
/** \} */
+
+ /**
+ * Flag set if GL_ARB_post_depth_coverage layout qualifier is used.
+ */
+ unsigned post_depth_coverage:1;
}
/** \brief Set of flags, accessed by name. */
q;
diff --git a/src/compiler/glsl/ast_to_hir.cpp b/src/compiler/glsl/ast_to_hir.cpp
index 9b8678c..c31da86 100644
--- a/src/compiler/glsl/ast_to_hir.cpp
+++ b/src/compiler/glsl/ast_to_hir.cpp
@@ -3632,6 +3632,11 @@ apply_layout_qualifier_to_variable(const struct
ast_type_qualifier *qual,
_mesa_glsl_error(loc, state, "early_fragment_tests layout qualifier only
"
"valid in fragment shader input layout declaration.");
}
+
+ if (qual->flags.q.post_depth_coverage) {
+ _mesa_glsl_error(loc, state, "post_depth_coverage layout qualifier only "
+ "valid in fragment shader input layout declaration.");
+ }
}
static void
diff --git a/src/compiler/glsl/ast_type.cpp b/src/compiler/glsl/ast_type.cpp
index 2856f18..1905721 100644
--- a/src/compiler/glsl/ast_type.cpp
+++ b/src/compiler/glsl/ast_type.cpp
@@ -489,6 +489,7 @@ ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
break;
case MESA_SHADER_FRAGMENT:
valid_in_mask.flags.q.early_fragment_tests = 1;
+ valid_in_mask.flags.q.post_depth_coverage = 1;
break;
case MESA_SHADER_COMPUTE:
create_cs_ast |=
@@ -540,6 +541,10 @@ ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
state->fs_early_fragment_tests = true;
}
+ if (q.flags.q.post_depth_coverage) {
+ state->fs_post_depth_coverage = true;
+ }
+
if (this->flags.q.vertex_spacing) {
if (q.flags.q.vertex_spacing &&
this->vertex_spacing != q.vertex_spacing) {
@@ -671,7 +676,8 @@ ast_type_qualifier::validate_flags(YYLTYPE *loc,
bad.flags.q.point_mode ? " point_mode" : "",
bad.flags.q.vertices ? " vertices" : "",
bad.flags.q.subroutine ? " subroutine" : "",
- bad.flags.q.subroutine_def ? " subroutine_def" : "");
+ bad.flags.q.subroutine_def ? " subroutine_def" : "",
+ bad.flags.q.post_depth_coverage ? " post_depth_coverage" :
"");
return false;
}
diff --git a/src/compiler/glsl/glsl_parser.yy b/src/compiler/glsl/glsl_parser.yy
index a48dc68..a53f476 100644
--- a/src/compiler/glsl/glsl_parser.yy
+++ b/src/compiler/glsl/glsl_parser.yy
@@ -1373,6 +1373,17 @@ layout_qualifier_id:
$$.flags.q.early_fragment_tests = 1;
}
+
+ if (!$$.flags.i &&
+ match_layout_qualifier($1, "post_depth_coverage", state) == 0) {
+ if (state->stage != MESA_SHADER_FRAGMENT) {
+ _mesa_glsl_error(& @1, state,
+ "post_depth_coverage layout qualifier only "
+ "valid in fragment shaders");
+ }
+
+ $$.flags.q.post_depth_coverage = 1;
+ }
}
/* Layout qualifiers for tessellation evaluation shaders. */
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp
b/src/compiler/glsl/glsl_parser_extras.cpp
index 85a2e94..bc252a0 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -295,6 +295,7 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct
gl_context *_ctx,
this->in_qualifier = new(this) ast_type_qualifier();
this->out_qualifier = new(this) ast_type_qualifier();
this->fs_early_fragment_tests = false;
+ this->fs_post_depth_coverage = false;
this->fs_blend_support = 0;
memset(this->atomic_counter_offsets, 0,
sizeof(this->atomic_counter_offsets));
@@ -608,6 +609,7 @@ static const _mesa_glsl_extension
_mesa_glsl_supported_extensions[] = {
EXT(ARB_fragment_layer_viewport),
EXT(ARB_gpu_shader5),
EXT(ARB_gpu_shader_fp64),
+ EXT(ARB_post_depth_coverage),
EXT(ARB_sample_shading),
EXT(ARB_separate_shader_objects),
EXT(ARB_shader_atomic_counter_ops),
@@ -1692,6 +1694,7 @@ set_shader_inout_layout(struct gl_shader *shader,
assert(!state->fs_pixel_center_integer);
assert(!state->fs_origin_upper_left);
assert(!state->fs_early_fragment_tests);
+ assert(!state->fs_post_depth_coverage);
}
for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
@@ -1812,6 +1815,7 @@ set_shader_inout_layout(struct gl_shader *shader,
shader->info.ARB_fragment_coord_conventions_enable =
state->ARB_fragment_coord_conventions_enable;
shader->info.EarlyFragmentTests = state->fs_early_fragment_tests;
+ shader->info.PostDepthCoverage = state->fs_post_depth_coverage;
shader->info.BlendSupport = state->fs_blend_support;
break;
diff --git a/src/compiler/glsl/glsl_parser_extras.h b/src/compiler/glsl/glsl_parser_extras.h
index d757c1d..4277d43 100644
--- a/src/compiler/glsl/glsl_parser_extras.h
+++ b/src/compiler/glsl/glsl_parser_extras.h
@@ -610,6 +610,8 @@ struct _mesa_glsl_parse_state {
bool ARB_gpu_shader5_warn;
bool ARB_gpu_shader_fp64_enable;
bool ARB_gpu_shader_fp64_warn;
+ bool ARB_post_depth_coverage_enable;
+ bool ARB_post_depth_coverage_warn;
bool ARB_sample_shading_enable;
bool ARB_sample_shading_warn;
bool ARB_separate_shader_objects_enable;
@@ -786,6 +788,8 @@ struct _mesa_glsl_parse_state {
bool fs_early_fragment_tests;
+ bool fs_post_depth_coverage;
+
unsigned fs_blend_support;
/**
diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index 1a00a90..d127d0c 100644
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -1887,6 +1887,10 @@ link_fs_inout_layout_qualifiers(struct gl_shader_program
*prog,
linked_shader->info.EarlyFragmentTests |=
shader->info.EarlyFragmentTests;
+
+ linked_shader->info.PostDepthCoverage |=
+ shader->info.PostDepthCoverage;
+
linked_shader->info.BlendSupport |= shader->info.BlendSupport;
}
}
diff --git a/src/compiler/shader_info.h b/src/compiler/shader_info.h
index 7ea5d9c..b2830e0 100644
--- a/src/compiler/shader_info.h
+++ b/src/compiler/shader_info.h
@@ -116,6 +116,7 @@ typedef struct shader_info {
* ARB_shader_image_load_store.
*/
bool early_fragment_tests;
+ bool post_depth_coverage;
/** gl_FragDepth layout for ARB_conservative_depth. */
enum gl_frag_depth_layout depth_layout;
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index d3ec551..f2d3a5b 100644
--- a/src/mesa/main/extensions_table.h
+++ b/src/mesa/main/extensions_table.h
@@ -93,6 +93,7 @@ EXT(ARB_pipeline_statistics_query ,
ARB_pipeline_statistics_query
EXT(ARB_pixel_buffer_object , EXT_pixel_buffer_object
, GLL, GLC, x , x , 2004)
EXT(ARB_point_parameters , EXT_point_parameters
, GLL, x , x , x , 1997)
EXT(ARB_point_sprite , ARB_point_sprite
, GLL, GLC, x , x , 2003)
+EXT(ARB_post_depth_coverage , ARB_post_depth_coverage
, x , 32, x , x, 2015)
EXT(ARB_program_interface_query , dummy_true
, GLL, GLC, x , x , 2012)
EXT(ARB_provoking_vertex , EXT_provoking_vertex
, GLL, GLC, x , x , 2009)
EXT(ARB_query_buffer_object , ARB_query_buffer_object
, GLL, GLC, x , x , 2013)
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 26b1965..9d50304 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2174,6 +2174,7 @@ struct gl_shader_info
{
bool uses_gl_fragcoord;
bool redeclares_gl_fragcoord;
+ bool PostDepthCoverage;
bool ARB_fragment_coord_conventions_enable;
/**
@@ -3815,6 +3816,7 @@ struct gl_extensions
GLboolean ARB_occlusion_query2;
GLboolean ARB_pipeline_statistics_query;
GLboolean ARB_point_sprite;
+ GLboolean ARB_post_depth_coverage;
GLboolean ARB_query_buffer_object;
GLboolean ARB_robust_buffer_access_behavior;
GLboolean ARB_sample_shading;
diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 83ee0d4..33e4334 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -2194,6 +2194,7 @@ _mesa_copy_linked_program_data(const struct
gl_shader_program *src,
case MESA_SHADER_FRAGMENT: {
dst->info.fs.depth_layout = src->FragDepthLayout;
dst->info.fs.early_fragment_tests = dst_sh->info.EarlyFragmentTests;
+ dst->info.fs.post_depth_coverage = dst_sh->info.PostDepthCoverage;
break;
}
case MESA_SHADER_COMPUTE: {
