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>
---
include/GL/glext.h | 4 ++++
src/compiler/glsl/ast.h | 1 +
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 | 3 +++
src/compiler/glsl/glsl_parser_extras.h | 2 ++
src/compiler/glsl/linker.cpp | 4 ++++
src/mapi/glapi/gen/gl_API.xml | 3 +++
src/mesa/main/extensions_table.h | 1 +
src/mesa/main/mtypes.h | 2 ++
11 files changed, 43 insertions(+), 1 deletion(-)
diff --git a/include/GL/glext.h b/include/GL/glext.h
index 4753575..7256fe5 100644
--- a/include/GL/glext.h
+++ b/include/GL/glext.h
@@ -4860,6 +4860,10 @@ GLAPI GLint APIENTRY glGetAttribLocationARB (GLhandleARB
programObj, const GLcha
#define GL_ARB_viewport_array 1
#endif /* GL_ARB_viewport_array */
+#ifndef GL_ARB_post_depth_coverage
+#define GL_ARB_post_depth_coverage 1
+#endif /* GL_ARB_post_depth_coverage */
+
#ifndef GL_ARB_window_pos
#define GL_ARB_window_pos 1
typedef void (APIENTRYP PFNGLWINDOWPOS2DARBPROC) (GLdouble x, GLdouble y);
diff --git a/src/compiler/glsl/ast.h b/src/compiler/glsl/ast.h
index 55f9a6c..e7815b0 100644
--- a/src/compiler/glsl/ast.h
+++ b/src/compiler/glsl/ast.h
@@ -606,6 +606,7 @@ struct ast_type_qualifier {
/** \{ */
unsigned blend_support:1; /**< Are there any blend_support_
qualifiers */
/** \} */
+ 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 7d709c7..9a65550 100644
--- a/src/compiler/glsl/glsl_parser.yy
+++ b/src/compiler/glsl/glsl_parser.yy
@@ -1369,6 +1369,17 @@ 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 0cb3c12..33c27cb 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -294,6 +294,7 @@ _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));
@@ -1690,6 +1691,7 @@ 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++) {
@@ -1810,6 +1812,7 @@ 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 53abbbc..87f024c 100644
--- a/src/compiler/glsl/glsl_parser_extras.h
+++ b/src/compiler/glsl/glsl_parser_extras.h
@@ -784,6 +784,8 @@ 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 cc28b26..85f1030 100644
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -1886,6 +1886,10 @@ 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/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml
index 00c9bb7..66266ce 100644
--- a/src/mapi/glapi/gen/gl_API.xml
+++ b/src/mapi/glapi/gen/gl_API.xml
@@ -8361,6 +8361,9 @@
</category>
+<category name="ARB_post_depth_coverage" number="180">
+</category>
+
<!-- Non-ARB extensions sorted by extension number. -->
<category name="GL_EXT_blend_color" number="2">
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index 036e62b..4a91422 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
, 45, 45, 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 d2c1e58..7e369c2 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2170,6 +2170,7 @@ struct gl_shader_info
bool uses_builtin_functions;
bool uses_gl_fragcoord;
bool redeclares_gl_fragcoord;
+ bool PostDepthCoverage;
bool ARB_fragment_coord_conventions_enable;
/**
@@ -3797,6 +3798,7 @@ 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;
--
2.7.4
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
