[Mesa-dev] [PATCH 1/2] mesa: Add GL/GLSL plumbing for ARB_fragment_shader_interlock.
Plamena Manolova
plamena.n.manolova at gmail.com
Thu Apr 5 11:48:09 UTC 2018
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.n.manolova at gmail.com>
---
src/compiler/glsl/ast.h | 10 ++++
src/compiler/glsl/ast_to_hir.cpp | 10 ++++
src/compiler/glsl/ast_type.cpp | 30 +++++++++++-
src/compiler/glsl/builtin_functions.cpp | 79 ++++++++++++++++++++++++++++++++
src/compiler/glsl/glsl_parser.yy | 46 +++++++++++++++++++
src/compiler/glsl/glsl_parser_extras.cpp | 13 ++++++
src/compiler/glsl/glsl_parser_extras.h | 7 +++
src/compiler/glsl/glsl_to_nir.cpp | 12 +++++
src/compiler/glsl/ir.h | 2 +
src/compiler/glsl/linker.cpp | 8 ++++
src/compiler/nir/nir_intrinsics.h | 2 +
src/compiler/shader_info.h | 5 ++
src/mesa/main/extensions_table.h | 1 +
src/mesa/main/mtypes.h | 5 ++
14 files changed, 229 insertions(+), 1 deletion(-)
diff --git a/src/compiler/glsl/ast.h b/src/compiler/glsl/ast.h
index a1ec0d566f..319a6a82c1 100644
--- a/src/compiler/glsl/ast.h
+++ b/src/compiler/glsl/ast.h
@@ -620,6 +620,16 @@ struct ast_type_qualifier {
* Flag set if GL_ARB_post_depth_coverage layout qualifier is used.
*/
unsigned post_depth_coverage:1;
+
+ /**
+ * Flags for the layout qualifers added by ARB_fragment_shader_interlock
+ */
+
+ unsigned pixel_interlock_ordered:1;
+ unsigned pixel_interlock_unordered:1;
+ unsigned sample_interlock_ordered:1;
+ unsigned sample_interlock_unordered:1;
+
/**
* Flag set if GL_INTEL_conservartive_rasterization layout qualifier
* is used.
diff --git a/src/compiler/glsl/ast_to_hir.cpp b/src/compiler/glsl/ast_to_hir.cpp
index badfbe6816..2358153c5f 100644
--- a/src/compiler/glsl/ast_to_hir.cpp
+++ b/src/compiler/glsl/ast_to_hir.cpp
@@ -3897,6 +3897,16 @@ apply_layout_qualifier_to_variable(const struct ast_type_qualifier *qual,
if (state->has_bindless())
apply_bindless_qualifier_to_variable(qual, var, state, loc);
+
+ if (qual->flags.q.pixel_interlock_ordered ||
+ qual->flags.q.pixel_interlock_unordered ||
+ qual->flags.q.sample_interlock_ordered ||
+ qual->flags.q.sample_interlock_unordered) {
+ _mesa_glsl_error(loc, state, "interlock layout qualifiers: "
+ "pixel_interlock_ordered, pixel_interlock_unordered, "
+ "sample_interlock_ordered and sample_interlock_unordered, "
+ "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 14ea936f24..49697d3411 100644
--- a/src/compiler/glsl/ast_type.cpp
+++ b/src/compiler/glsl/ast_type.cpp
@@ -637,6 +637,10 @@ ast_type_qualifier::validate_in_qualifier(YYLTYPE *loc,
valid_in_mask.flags.q.early_fragment_tests = 1;
valid_in_mask.flags.q.inner_coverage = 1;
valid_in_mask.flags.q.post_depth_coverage = 1;
+ valid_in_mask.flags.q.pixel_interlock_ordered = 1;
+ valid_in_mask.flags.q.pixel_interlock_unordered = 1;
+ valid_in_mask.flags.q.sample_interlock_ordered = 1;
+ valid_in_mask.flags.q.sample_interlock_unordered = 1;
break;
case MESA_SHADER_COMPUTE:
valid_in_mask.flags.q.local_size = 7;
@@ -708,6 +712,26 @@ ast_type_qualifier::merge_into_in_qualifier(YYLTYPE *loc,
r = false;
}
+ if (state->in_qualifier->flags.q.pixel_interlock_ordered) {
+ state->fs_pixel_interlock_ordered = true;
+ state->in_qualifier->flags.q.pixel_interlock_ordered = false;
+ }
+
+ if (state->in_qualifier->flags.q.pixel_interlock_unordered) {
+ state->fs_pixel_interlock_unordered = true;
+ state->in_qualifier->flags.q.pixel_interlock_unordered = false;
+ }
+
+ if (state->in_qualifier->flags.q.sample_interlock_ordered) {
+ state->fs_sample_interlock_ordered = true;
+ state->in_qualifier->flags.q.sample_interlock_ordered = false;
+ }
+
+ if (state->in_qualifier->flags.q.sample_interlock_unordered) {
+ state->fs_sample_interlock_unordered = true;
+ state->in_qualifier->flags.q.sample_interlock_unordered = 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.
@@ -776,7 +800,7 @@ ast_type_qualifier::validate_flags(YYLTYPE *loc,
"%s '%s':"
"%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
"%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
- "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
+ "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
message, name,
bad.flags.q.invariant ? " invariant" : "",
bad.flags.q.precise ? " precise" : "",
@@ -840,6 +864,10 @@ ast_type_qualifier::validate_flags(YYLTYPE *loc,
bad.flags.q.bound_sampler ? " bound_sampler" : "",
bad.flags.q.bound_image ? " bound_image" : "",
bad.flags.q.post_depth_coverage ? " post_depth_coverage" : "",
+ bad.flags.q.pixel_interlock_ordered ? " pixel_interlock_ordered" : "",
+ bad.flags.q.pixel_interlock_unordered ? " pixel_interlock_unordered": "",
+ bad.flags.q.sample_interlock_ordered ? " sample_interlock_ordered": "",
+ bad.flags.q.sample_interlock_unordered ? " sample_interlock_unordered": "",
bad.flags.q.non_coherent ? " noncoherent" : "");
return false;
}
diff --git a/src/compiler/glsl/builtin_functions.cpp b/src/compiler/glsl/builtin_functions.cpp
index 5f772c9eab..52c05feb35 100644
--- a/src/compiler/glsl/builtin_functions.cpp
+++ b/src/compiler/glsl/builtin_functions.cpp
@@ -513,6 +513,12 @@ shader_ballot(const _mesa_glsl_parse_state *state)
}
static bool
+supports_arb_fragment_shader_interlock(const _mesa_glsl_parse_state *state)
+{
+ return state->ARB_fragment_shader_interlock_enable;
+}
+
+static bool
shader_clock(const _mesa_glsl_parse_state *state)
{
return state->ARB_shader_clock_enable;
@@ -982,6 +988,21 @@ private:
ir_function_signature *_read_invocation_intrinsic(const glsl_type *type);
ir_function_signature *_read_invocation(const glsl_type *type);
+
+ ir_function_signature *_begin_invocation_interlock_ARB_intrinsic(
+ builtin_available_predicate avail,
+ enum ir_intrinsic_id id);
+ ir_function_signature *_begin_invocation_interlock_ARB(
+ const char *intrinsic_name,
+ builtin_available_predicate avail);
+
+ ir_function_signature *_end_invocation_interlock_ARB_intrinsic(
+ builtin_available_predicate avail,
+ enum ir_intrinsic_id id);
+ ir_function_signature *_end_invocation_interlock_ARB(
+ const char *intrinsic_name,
+ builtin_available_predicate avail);
+
ir_function_signature *_shader_clock_intrinsic(builtin_available_predicate avail,
const glsl_type *type);
ir_function_signature *_shader_clock(builtin_available_predicate avail,
@@ -1219,6 +1240,16 @@ builtin_builder::create_intrinsics()
ir_intrinsic_memory_barrier_shared),
NULL);
+ add_function("__intrinsic_begin_invocation_interlock_ARB",
+ _begin_invocation_interlock_ARB_intrinsic(
+ supports_arb_fragment_shader_interlock,
+ ir_intrinsic_begin_invocation_interlock_ARB), NULL);
+
+ add_function("__intrinsic_end_invocation_interlock_ARB",
+ _end_invocation_interlock_ARB_intrinsic(
+ supports_arb_fragment_shader_interlock,
+ ir_intrinsic_end_invocation_interlock_ARB), NULL);
+
add_function("__intrinsic_shader_clock",
_shader_clock_intrinsic(shader_clock,
glsl_type::uvec2_type),
@@ -3294,6 +3325,18 @@ builtin_builder::create_builtins()
glsl_type::uint64_t_type),
NULL);
+ add_function("beginInvocationInterlockARB",
+ _begin_invocation_interlock_ARB(
+ "__intrinsic_begin_invocation_interlock_ARB",
+ supports_arb_fragment_shader_interlock),
+ NULL);
+
+ add_function("endInvocationInterlockARB",
+ _end_invocation_interlock_ARB(
+ "__intrinsic_end_invocation_interlock_ARB",
+ supports_arb_fragment_shader_interlock),
+ NULL);
+
add_function("anyInvocationARB",
_vote("__intrinsic_vote_any", vote),
NULL);
@@ -6228,6 +6271,42 @@ builtin_builder::_read_invocation(const glsl_type *type)
}
ir_function_signature *
+builtin_builder::_begin_invocation_interlock_ARB_intrinsic(builtin_available_predicate avail,
+ enum ir_intrinsic_id id)
+{
+ MAKE_INTRINSIC(glsl_type::void_type, id, avail, 0);
+ return sig;
+}
+
+ir_function_signature *
+builtin_builder::_begin_invocation_interlock_ARB(const char *intrinsic_name,
+ builtin_available_predicate avail)
+{
+ MAKE_SIG(glsl_type::void_type, avail, 0);
+ body.emit(call(shader->symbols->get_function(intrinsic_name),
+ NULL, sig->parameters));
+ return sig;
+}
+
+ir_function_signature *
+builtin_builder::_end_invocation_interlock_ARB_intrinsic(builtin_available_predicate avail,
+ enum ir_intrinsic_id id)
+{
+ MAKE_INTRINSIC(glsl_type::void_type, id, avail, 0);
+ return sig;
+}
+
+ir_function_signature *
+builtin_builder::_end_invocation_interlock_ARB(const char *intrinsic_name,
+ builtin_available_predicate avail)
+{
+ MAKE_SIG(glsl_type::void_type, avail, 0);
+ body.emit(call(shader->symbols->get_function(intrinsic_name),
+ NULL, sig->parameters));
+ return sig;
+}
+
+ir_function_signature *
builtin_builder::_shader_clock_intrinsic(builtin_available_predicate avail,
const glsl_type *type)
{
diff --git a/src/compiler/glsl/glsl_parser.yy b/src/compiler/glsl/glsl_parser.yy
index e5ea41d4df..49f562551d 100644
--- a/src/compiler/glsl/glsl_parser.yy
+++ b/src/compiler/glsl/glsl_parser.yy
@@ -1432,6 +1432,52 @@ layout_qualifier_id:
}
}
+ int pixel_interlock_ordered = match_layout_qualifier($1,
+ "pixel_interlock_ordered", state) == 0 ? 1 : 0;
+ int pixel_interlock_unordered = match_layout_qualifier($1,
+ "pixel_interlock_unordered", state) == 0 ? 1 : 0;
+ int sample_interlock_ordered = match_layout_qualifier($1,
+ "sample_interlock_ordered", state) == 0 ? 1 : 0;
+ int sample_interlock_unordered = match_layout_qualifier($1,
+ "sample_interlock_unordered", state) == 0 ? 1 : 0;
+
+ if (pixel_interlock_ordered + pixel_interlock_unordered +
+ sample_interlock_ordered + sample_interlock_unordered > 0 &&
+ state->stage != MESA_SHADER_FRAGMENT) {
+ _mesa_glsl_error(& @1, state, "interlock layout qualifiers: "
+ "pixel_interlock_ordered, pixel_interlock_unordered, "
+ "sample_interlock_ordered and sample_interlock_unordered, "
+ "only valid in fragment shader input layout declaration.");
+ } else if (pixel_interlock_ordered + pixel_interlock_unordered +
+ sample_interlock_ordered + sample_interlock_unordered > 0 &&
+ !state->ARB_fragment_shader_interlock_enable) {
+ _mesa_glsl_error(& @1, state,
+ "interlock layout qualifier present, but the "
+ "GL_ARB_fragment_shader_interlock extension is not "
+ "enabled.");
+ } else if (pixel_interlock_ordered + pixel_interlock_unordered +
+ sample_interlock_ordered + sample_interlock_unordered > 1) {
+ _mesa_glsl_error(& @1, state,
+ "only one interlock mode can be used at any time.");
+ } else if (pixel_interlock_ordered + pixel_interlock_unordered > 0 &&
+ state->ctx->Multisample.Enabled) {
+ _mesa_glsl_error(& @1, state,
+ "pixel_interlock_ordered and "
+ "pixel_interlock_unordered can only be used when "
+ "multisampling is disabled.");
+ } else if (sample_interlock_ordered + sample_interlock_unordered > 0 &&
+ !state->ctx->Multisample.Enabled) {
+ _mesa_glsl_error(& @1, state,
+ "sample_interlock_ordered and "
+ "sample_interlock_unordered can only be used when "
+ "multisampling is enabled.");
+ } else {
+ $$.flags.q.pixel_interlock_ordered = pixel_interlock_ordered;
+ $$.flags.q.pixel_interlock_unordered = pixel_interlock_unordered;
+ $$.flags.q.sample_interlock_ordered = sample_interlock_ordered;
+ $$.flags.q.sample_interlock_unordered = sample_interlock_unordered;
+ }
+
/* Layout qualifiers for tessellation evaluation shaders. */
if (!$$.flags.i) {
static const struct {
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp b/src/compiler/glsl/glsl_parser_extras.cpp
index 275c4d7571..0819a900fc 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -300,6 +300,10 @@ _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));
@@ -629,6 +633,7 @@ 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),
@@ -1720,6 +1725,10 @@ 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++) {
@@ -1841,6 +1850,10 @@ 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;
diff --git a/src/compiler/glsl/glsl_parser_extras.h b/src/compiler/glsl/glsl_parser_extras.h
index 66bd1a3db6..03b7fa9310 100644
--- a/src/compiler/glsl/glsl_parser_extras.h
+++ b/src/compiler/glsl/glsl_parser_extras.h
@@ -634,6 +634,8 @@ struct _mesa_glsl_parse_state {
bool ARB_fragment_coord_conventions_warn;
bool ARB_fragment_layer_viewport_enable;
bool ARB_fragment_layer_viewport_warn;
+ bool ARB_fragment_shader_interlock_enable;
+ bool ARB_fragment_shader_interlock_warn;
bool ARB_gpu_shader5_enable;
bool ARB_gpu_shader5_warn;
bool ARB_gpu_shader_fp64_enable;
@@ -828,6 +830,11 @@ struct _mesa_glsl_parse_state {
bool fs_post_depth_coverage;
+ bool fs_pixel_interlock_ordered;
+ bool fs_pixel_interlock_unordered;
+ bool fs_sample_interlock_ordered;
+ bool fs_sample_interlock_unordered;
+
unsigned fs_blend_support;
/**
diff --git a/src/compiler/glsl/glsl_to_nir.cpp b/src/compiler/glsl/glsl_to_nir.cpp
index 80eb15f1ab..c5666bd443 100644
--- a/src/compiler/glsl/glsl_to_nir.cpp
+++ b/src/compiler/glsl/glsl_to_nir.cpp
@@ -750,6 +750,12 @@ nir_visitor::visit(ir_call *ir)
case ir_intrinsic_shader_clock:
op = nir_intrinsic_shader_clock;
break;
+ case ir_intrinsic_begin_invocation_interlock_ARB:
+ op = nir_intrinsic_begin_invocation_interlock_ARB;
+ break;
+ case ir_intrinsic_end_invocation_interlock_ARB:
+ op = nir_intrinsic_end_invocation_interlock_ARB;
+ break;
case ir_intrinsic_group_memory_barrier:
op = nir_intrinsic_group_memory_barrier;
break;
@@ -968,6 +974,12 @@ nir_visitor::visit(ir_call *ir)
instr->num_components = 2;
nir_builder_instr_insert(&b, &instr->instr);
break;
+ case nir_intrinsic_begin_invocation_interlock_ARB:
+ nir_builder_instr_insert(&b, &instr->instr);
+ break;
+ case nir_intrinsic_end_invocation_interlock_ARB:
+ nir_builder_instr_insert(&b, &instr->instr);
+ break;
case nir_intrinsic_store_ssbo: {
exec_node *param = ir->actual_parameters.get_head();
ir_rvalue *block = ((ir_instruction *)param)->as_rvalue();
diff --git a/src/compiler/glsl/ir.h b/src/compiler/glsl/ir.h
index 6d3ef89eb8..e36666650d 100644
--- a/src/compiler/glsl/ir.h
+++ b/src/compiler/glsl/ir.h
@@ -1121,6 +1121,8 @@ enum ir_intrinsic_id {
ir_intrinsic_memory_barrier_buffer,
ir_intrinsic_memory_barrier_image,
ir_intrinsic_memory_barrier_shared,
+ ir_intrinsic_begin_invocation_interlock_ARB,
+ ir_intrinsic_end_invocation_interlock_ARB,
ir_intrinsic_vote_all,
ir_intrinsic_vote_any,
diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index 1444b68cb0..8d41d2ba04 100644
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -1977,6 +1977,14 @@ link_fs_inout_layout_qualifiers(struct gl_shader_program *prog,
linked_shader->Program->info.fs.inner_coverage |= shader->InnerCoverage;
linked_shader->Program->info.fs.post_depth_coverage |=
shader->PostDepthCoverage;
+ linked_shader->Program->info.fs.pixel_interlock_ordered |=
+ shader->PixelInterlockOrdered;
+ linked_shader->Program->info.fs.pixel_interlock_unordered |=
+ shader->PixelInterlockUnordered;
+ linked_shader->Program->info.fs.sample_interlock_ordered |=
+ shader->SampleInterlockOrdered;
+ linked_shader->Program->info.fs.sample_interlock_unordered |=
+ shader->SampleInterlockUnordered;
linked_shader->Program->sh.fs.BlendSupport |= shader->BlendSupport;
}
diff --git a/src/compiler/nir/nir_intrinsics.h b/src/compiler/nir/nir_intrinsics.h
index 7b737559d5..b227051fd8 100644
--- a/src/compiler/nir/nir_intrinsics.h
+++ b/src/compiler/nir/nir_intrinsics.h
@@ -129,6 +129,8 @@ BARRIER(memory_barrier_buffer)
BARRIER(memory_barrier_image)
BARRIER(memory_barrier_shared)
+BARRIER(begin_invocation_interlock_ARB)
+BARRIER(end_invocation_interlock_ARB)
/** A conditional discard, with a single boolean source. */
INTRINSIC(discard_if, 1, ARR(1), false, 0, 0, 0, xx, xx, xx, 0)
diff --git a/src/compiler/shader_info.h b/src/compiler/shader_info.h
index b1e200070f..0570c08939 100644
--- a/src/compiler/shader_info.h
+++ b/src/compiler/shader_info.h
@@ -174,6 +174,11 @@ typedef struct shader_info {
bool pixel_center_integer;
+ bool pixel_interlock_ordered;
+ bool pixel_interlock_unordered;
+ bool sample_interlock_ordered;
+ bool sample_interlock_unordered;
+
/** gl_FragDepth layout for ARB_conservative_depth. */
enum gl_frag_depth_layout depth_layout;
} fs;
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index 492f7c3d20..79842a5f5d 100644
--- a/src/mesa/main/extensions_table.h
+++ b/src/mesa/main/extensions_table.h
@@ -68,6 +68,7 @@ EXT(ARB_fragment_layer_viewport , ARB_fragment_layer_viewport
EXT(ARB_fragment_program , ARB_fragment_program , GLL, x , x , x , 2002)
EXT(ARB_fragment_program_shadow , ARB_fragment_program_shadow , GLL, x , x , x , 2003)
EXT(ARB_fragment_shader , ARB_fragment_shader , GLL, GLC, x , x , 2002)
+EXT(ARB_fragment_shader_interlock , ARB_fragment_shader_interlock , GLL, GLC, x , x , 2015)
EXT(ARB_framebuffer_no_attachments , ARB_framebuffer_no_attachments , GLL, GLC, x , x , 2012)
EXT(ARB_framebuffer_object , ARB_framebuffer_object , GLL, GLC, x , x , 2005)
EXT(ARB_framebuffer_sRGB , EXT_framebuffer_sRGB , GLL, GLC, x , x , 1998)
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 2df2288899..8bc76ab9b7 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2738,6 +2738,10 @@ struct gl_shader
bool uses_gl_fragcoord;
bool PostDepthCoverage;
+ bool PixelInterlockOrdered;
+ bool PixelInterlockUnordered;
+ bool SampleInterlockOrdered;
+ bool SampleInterlockUnordered;
bool InnerCoverage;
/**
@@ -4199,6 +4203,7 @@ struct gl_extensions
GLboolean ARB_fragment_shader;
GLboolean ARB_framebuffer_no_attachments;
GLboolean ARB_framebuffer_object;
+ GLboolean ARB_fragment_shader_interlock;
GLboolean ARB_enhanced_layouts;
GLboolean ARB_explicit_attrib_location;
GLboolean ARB_explicit_uniform_location;
--
2.11.0
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