commit d27f5c8d2bae201f412973d00904538f778f2f10
author Jiawei Shao <jiawei.shao@intel.com> Wed Aug 23 09:38:08 2017 +0800
committer Commit Bot <commit-bot@chromium.org> Fri Aug 25 15:18:21 2017 +0000
tree d4fdc0caad6053d7d659716e5cbeb7d2dbaee5a8
parent 3c25ad071e65f9239c29a386cfbdb29064795000

ES31: Implement GL_OES_geometry_shader built-ins in GLSL compiler

This patch intends to implement all built-in constants, variables and
functions defined in OpenGL ES 3.1 extension GL_OES_geometry_shader
in ANGLE GLSL compiler.

1. Add all built-in constants defined in GL_OES_geometry_shader.
2. Add built-in functions EmitVertex() and EndPrimitive() required
   in Geometry Shader.
3. Add built-in variables gl_PrimitiveIDIn and gl_InvocationID to
   Geometry Shader.
4. Add built-in variables gl_PrimitiveID and gl_Layer to both
   Geometry Shader and Fragment Shader when GL_OES_geometry_shader
   is enabled.

BUG=angleproject:1941
TEST=angle_unittests

Change-Id: I92821553ed0efee2ccb77fead6e065e7799819d0
Reviewed-on: https://chromium-review.googlesource.com/627670
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

src/compiler/translator/SymbolTable.h

diff --git a/src/compiler/translator/SymbolTable.h b/src/compiler/translator/SymbolTable.h
index 6d9b714..58788a1 100644
--- a/src/compiler/translator/SymbolTable.h
+++ b/src/compiler/translator/SymbolTable.h
@@ -361,10 +361,14 @@
         return insert(level, constant);
     }
 
-    bool insertConstIntExt(ESymbolLevel level, const char *ext, const char *name, int value)
+    bool insertConstIntExt(ESymbolLevel level,
+                           const char *ext,
+                           const char *name,
+                           int value,
+                           TPrecision precision)
     {
         TVariable *constant =
-            new TVariable(this, NewPoolTString(name), TType(EbtInt, EbpUndefined, EvqConst, 1));
+            new TVariable(this, NewPoolTString(name), TType(EbtInt, precision, EvqConst, 1));
         TConstantUnion *unionArray = new TConstantUnion[1];
         unionArray[0].setIConst(value);
         constant->shareConstPointer(unionArray);
@@ -451,6 +455,12 @@
                                            const TType *rvalue,
                                            const char *name);
 
+    void insertBuiltInFunctionNoParametersExt(ESymbolLevel level,
+                                              const char *ext,
+                                              TOperator op,
+                                              const TType *rvalue,
+                                              const char *name);
+
     TSymbol *find(const TString &name,
                   int shaderVersion,
                   bool *builtIn   = nullptr,