[Mesa-dev] [PATCH 03/37] glsl: add transform feedback built-in constants

[Timothy Arceri]

These are new built-ins added by ARB_enhanced_layouts.
---
 src/compiler/glsl/builtin_variables.cpp  | 7 +++++++
 src/compiler/glsl/glsl_parser_extras.cpp | 4 ++++
 src/compiler/glsl/glsl_parser_extras.h   | 4 ++++
 3 files changed, 15 insertions(+)

diff --git a/src/compiler/glsl/builtin_variables.cpp b/src/compiler/glsl/builtin_variables.cpp
index 4e2de37..c39ae50 100644
--- a/src/compiler/glsl/builtin_variables.cpp
+++ b/src/compiler/glsl/builtin_variables.cpp
@@ -812,6 +812,13 @@ builtin_variable_generator::generate_constants()
        */
    }
 
+   if (state->has_enhanced_layouts()) {
+      add_const("gl_MaxTransformFeedbackBuffers",
+                state->Const.MaxTransformFeedbackBuffers);
+      add_const("gl_MaxTransformFeedbackInterleavedComponents",
+                state->Const.MaxTransformFeedbackInterleavedComponents);
+   }
+
    if (state->is_version(420, 310) ||
        state->ARB_shader_image_load_store_enable) {
       add_const("gl_MaxImageUnits",
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp b/src/compiler/glsl/glsl_parser_extras.cpp
index 1c6cd43..a286af9 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -138,6 +138,10 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
    this->Const.MaxAtomicCounterBufferSize =
       ctx->Const.MaxAtomicBufferSize;
 
+   /* ARB_enhanced_layouts constants */
+   this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
+   this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
+
    /* Compute shader constants */
    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
diff --git a/src/compiler/glsl/glsl_parser_extras.h b/src/compiler/glsl/glsl_parser_extras.h
index 12a3a46..2932adb 100644
--- a/src/compiler/glsl/glsl_parser_extras.h
+++ b/src/compiler/glsl/glsl_parser_extras.h
@@ -383,6 +383,10 @@ struct _mesa_glsl_parse_state {
       /* ARB_draw_buffers */
       unsigned MaxDrawBuffers;
 
+      /* ARB_enhanced_layouts */
+      unsigned MaxTransformFeedbackBuffers;
+      unsigned MaxTransformFeedbackInterleavedComponents;
+
       /* ARB_blend_func_extended */
       unsigned MaxDualSourceDrawBuffers;
 
-- 
2.5.0