[Mesa-dev] [RFC PATCH 37/56] glsl: Add builtin constants for ARB_tessellation_shader

[Chris Forbes]

---
 src/glsl/builtin_variables.cpp  | 16 ++++++++++++++++
 src/glsl/glsl_parser_extras.cpp | 11 +++++++++++
 src/glsl/glsl_parser_extras.h   | 11 +++++++++++
 3 files changed, 38 insertions(+)

diff --git a/src/glsl/builtin_variables.cpp b/src/glsl/builtin_variables.cpp
index 0909818..5c363b8 100644
--- a/src/glsl/builtin_variables.cpp
+++ b/src/glsl/builtin_variables.cpp
@@ -740,6 +740,22 @@ builtin_variable_generator::generate_constants()
       add_const("gl_MaxCombinedImageUniforms",
                 state->Const.MaxCombinedImageUniforms);
    }
+
+   if (state->is_version(400, 0) ||
+       state->ARB_tessellation_shader_enable) {
+      add_const("gl_MaxPatchVertices", state->Const.MaxPatchVertices);
+      add_const("gl_MaxTessGenLevel", state->Const.MaxTessGenLevel);
+      add_const("gl_MaxTessControlInputComponents", state->Const.MaxTessControlInputComponents);
+      add_const("gl_MaxTessControlOutputComponents", state->Const.MaxTessControlOutputComponents);
+      add_const("gl_MaxTessControlTextureImageUnits", state->Const.MaxTessControlTextureImageUnits);
+      add_const("gl_MaxTessEvaluationInputComponents", state->Const.MaxTessEvaluationInputComponents);
+      add_const("gl_MaxTessEvaluationOutputComponents", state->Const.MaxTessEvaluationOutputComponents);
+      add_const("gl_MaxTessEvaluationTextureImageUnits", state->Const.MaxTessEvaluationTextureImageUnits);
+      add_const("gl_MaxTessPatchComponents", state->Const.MaxTessPatchComponents);
+      add_const("gl_MaxTessControlTotalOutputComponents", state->Const.MaxTessControlTotalOutputComponents);
+      add_const("gl_MaxTessControlUniformComponents", state->Const.MaxTessControlUniformComponents);
+      add_const("gl_MaxTessEvaluationUniformComponents", state->Const.MaxTessEvaluationUniformComponents);
+   }
 }
 
 
diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index 0b45f44..8378f12 100644
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -136,6 +136,17 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
 
    /* tessellation shader constants */
    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
+   this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
+   this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
+   this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
+   this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
+   this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
+   this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
+   this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
+   this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
+   this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
+   this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
+   this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 
    this->current_function = NULL;
    this->toplevel_ir = NULL;
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 483bdd1..448700f 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -351,6 +351,17 @@ struct _mesa_glsl_parse_state {
 
       /* ARB_tessellation_shader */
       unsigned MaxPatchVertices;
+      unsigned MaxTessGenLevel;
+      unsigned MaxTessControlInputComponents;
+      unsigned MaxTessControlOutputComponents;
+      unsigned MaxTessControlTextureImageUnits;
+      unsigned MaxTessEvaluationInputComponents;
+      unsigned MaxTessEvaluationOutputComponents;
+      unsigned MaxTessEvaluationTextureImageUnits;
+      unsigned MaxTessPatchComponents;
+      unsigned MaxTessControlTotalOutputComponents;
+      unsigned MaxTessControlUniformComponents;
+      unsigned MaxTessEvaluationUniformComponents;
    } Const;
 
    /**
-- 
2.1.0