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mesa: Add GL and GLSL plumbing for ARB_post_depth_coverage for i965 (gen9+). 

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.manolova@intel.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
This commit is contained in:
Plamena Manolova 2016-12-06 21:32:36 +02:00 committed by Lionel Landwerlin
parent d3931a355f
commit 8481386892
11 changed files with 53 additions and 1 deletions
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5
src/compiler/glsl/ast.h
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@ -605,6 +605,11 @@ 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;

5
src/compiler/glsl/ast_to_hir.cpp
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@ -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

9
src/compiler/glsl/ast_type.cpp
View File

@ -579,6 +579,7 @@ ast_type_qualifier::validate_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:
valid_in_mask.flags.q.local_size = 7;
@ -633,6 +634,11 @@ ast_type_qualifier::merge_into_in_qualifier(YYLTYPE *loc,
state->in_qualifier->flags.q.early_fragment_tests = false;
}
if (state->in_qualifier->flags.q.post_depth_coverage) {
state->fs_post_depth_coverage = true;
state->in_qualifier->flags.q.post_depth_coverage = false;
}
/* We allow the creation of multiple cs_input_layout nodes. Coherence among
* all existing nodes is checked later, when the AST node is transformed
* into HIR.
@ -761,7 +767,8 @@ 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;
}

18
src/compiler/glsl/glsl_parser.yy
View File

@ -1392,6 +1392,24 @@ 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");
}
if (state->ARB_post_depth_coverage_enable) {
$$.flags.q.post_depth_coverage = 1;
} else {
_mesa_glsl_error(& @1, state,
"post_depth_coverage layout qualifier present, "
"but the GL_ARB_post_depth_coverage extension "
"is not enabled.");
}
}
}
/* Layout qualifiers for tessellation evaluation shaders. */

4
src/compiler/glsl/glsl_parser_extras.cpp
View File

@ -293,6 +293,7 @@ _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));
@ -606,6 +607,7 @@ 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),
@ -1690,6 +1692,7 @@ 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 +1813,7 @@ 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;

4
src/compiler/glsl/glsl_parser_extras.h
View File

@ -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;
/**

4
src/compiler/glsl/linker.cpp
View File

@ -1889,6 +1889,10 @@ link_fs_inout_layout_qualifiers(struct gl_shader_program *prog,
linked_shader->info.EarlyFragmentTests |=
shader->info.EarlyFragmentTests;
linked_shader->Program->info.fs.post_depth_coverage |=
shader->info.PostDepthCoverage;
linked_shader->info.BlendSupport |= shader->info.BlendSupport;
}
}

1
src/compiler/shader_info.h
View File

@ -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;

1
src/mesa/main/extensions_table.h
View File

@ -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 , GLC, 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)

2
src/mesa/main/mtypes.h
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@ -2174,6 +2174,7 @@ struct gl_shader_info
{
bool uses_gl_fragcoord;
bool redeclares_gl_fragcoord;
bool PostDepthCoverage;
bool ARB_fragment_coord_conventions_enable;
/**
@ -3819,6 +3820,7 @@ 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;

1
src/mesa/main/shaderapi.c
View File

@ -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: {