Initialize the symbol table without invoking the parser.

src/compiler/Compiler.cpp

 //
-// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
+// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
@@ -27,52 +27,6 @@ bool isWebGLBasedSpec(ShShaderSpec spec)
 }
 
 namespace {
-bool InitializeSymbolTable(
-    const TBuiltInStrings& builtInStrings,
-    ShShaderType type, ShShaderSpec spec, const ShBuiltInResources& resources,
-    TInfoSink& infoSink, TSymbolTable& symbolTable)
-{
-    TIntermediate intermediate(infoSink);
-    TExtensionBehavior extBehavior;
-    InitExtensionBehavior(resources, extBehavior);
-    // The builtins deliberately don't specify precisions for the function
-    // arguments and return types. For that reason we don't try to check them.
-    TParseContext parseContext(symbolTable, extBehavior, intermediate, type, spec, 0, false, NULL, infoSink);
-    parseContext.fragmentPrecisionHigh = resources.FragmentPrecisionHigh == 1;
-
-    GlobalParseContext = &parseContext;
-
-    assert(symbolTable.isEmpty());       
-    //
-    // Parse the built-ins.  This should only happen once per
-    // language symbol table.
-    //
-    // Push the symbol table to give it an initial scope.  This
-    // push should not have a corresponding pop, so that built-ins
-    // are preserved, and the test for an empty table fails.
-    //
-    symbolTable.push();
-
-    for (TBuiltInStrings::const_iterator i = builtInStrings.begin(); i != builtInStrings.end(); ++i)
-    {
-        const char* builtInShaders = i->c_str();
-        int builtInLengths = static_cast<int>(i->size());
-        if (builtInLengths <= 0)
-          continue;
-
-        if (PaParseStrings(1, &builtInShaders, &builtInLengths, &parseContext) != 0)
-        {
-            infoSink.info.prefix(EPrefixInternalError);
-            infoSink.info << "Unable to parse built-ins";
-            return false;
-        }
-    }
-
-    IdentifyBuiltIns(type, spec, resources, symbolTable);
-
-    return true;
-}
-
 class TScopedPoolAllocator {
 public:
     TScopedPoolAllocator(TPoolAllocator* allocator, bool pushPop)
@@ -252,14 +206,42 @@ bool TCompiler::compile(const char* const shaderStrings[],
     return success;
 }
 
-bool TCompiler::InitBuiltInSymbolTable(const ShBuiltInResources& resources)
+bool TCompiler::InitBuiltInSymbolTable(const ShBuiltInResources &resources)
 {
-    TBuiltIns builtIns;
-
     compileResources = resources;
-    builtIns.initialize(shaderType, shaderSpec, resources, extensionBehavior);
-    return InitializeSymbolTable(builtIns.getBuiltInStrings(),
-        shaderType, shaderSpec, resources, infoSink, symbolTable);
+
+    assert(symbolTable.isEmpty());
+    symbolTable.push();
+
+    TPublicType integer;
+    integer.type = EbtInt;
+    integer.size = 1;
+    integer.matrix = false;
+    integer.array = false;
+
+    TPublicType floatingPoint;
+    floatingPoint.type = EbtFloat;
+    floatingPoint.size = 1;
+    floatingPoint.matrix = false;
+    floatingPoint.array = false;
+
+    switch(shaderType)
+    {
+      case SH_FRAGMENT_SHADER:
+        symbolTable.setDefaultPrecision(integer, EbpMedium);
+        break;
+      case SH_VERTEX_SHADER:
+        symbolTable.setDefaultPrecision(integer, EbpHigh);
+        symbolTable.setDefaultPrecision(floatingPoint, EbpHigh);
+        break;
+      default: assert(false && "Language not supported");
+    }
+
+    InsertBuiltInFunctions(shaderType, shaderSpec, resources, extensionBehavior, symbolTable);
+
+    IdentifyBuiltIns(shaderType, shaderSpec, resources, symbolTable);
+
+    return true;
 }
 
 void TCompiler::clearResults()

src/compiler/Initialize.h

 //
-// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
+// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
@@ -11,20 +11,8 @@
 #include "compiler/ShHandle.h"
 #include "compiler/SymbolTable.h"
 
-typedef TVector<TString> TBuiltInStrings;
-
-class TBuiltIns {
-public:
-    POOL_ALLOCATOR_NEW_DELETE(GlobalPoolAllocator)
-
-    void initialize(ShShaderType type, ShShaderSpec spec,
-                    const ShBuiltInResources& resources,
-                    const TExtensionBehavior& extensionBehavior);
-    const TBuiltInStrings& getBuiltInStrings() { return builtInStrings; }
-
-protected:
-    TBuiltInStrings builtInStrings;
-};
+void InsertBuiltInFunctions(ShShaderType type, ShShaderSpec spec, const ShBuiltInResources &resources,
+                            const TExtensionBehavior &extensionBehavior, TSymbolTable &table);
 
 void IdentifyBuiltIns(ShShaderType type, ShShaderSpec spec,
                       const ShBuiltInResources& resources,

src/compiler/SymbolTable.h

 //
-// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
+// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
@@ -273,6 +273,35 @@ public:
         return table[currentLevel()]->insert(symbol);
     }
 
+    bool insertConstInt(const char *name, int value)
+    {
+        TVariable *constant = new TVariable(NewPoolTString(name), TType(EbtInt, EbpUndefined, EvqConst, 1));
+        constant->getConstPointer()->setIConst(value);
+        return insert(*constant);
+    }
+
+    bool insertBuiltIn(TType *rvalue, const char *name, TType *ptype1, const char *pname1, TType *ptype2 = 0, const char *pname2 = 0, TType *ptype3 = 0, const char *pname3 = 0)
+    {
+        TFunction *function = new TFunction(NewPoolTString(name), *rvalue);
+
+        TParameter param1 = {NewPoolTString(pname1), ptype1};
+        function->addParameter(param1);
+
+        if (pname2)
+        {
+            TParameter param2 = {NewPoolTString(pname2), ptype2};
+            function->addParameter(param2);
+        }
+
+        if (pname3)
+        {
+            TParameter param3 = {NewPoolTString(pname3), ptype3};
+            function->addParameter(param3);
+        }
+
+        return insert(*function);
+    }
+
     TSymbol* find(const TString& name, bool* builtIn = 0, bool *sameScope = 0) 
     {
         int level = currentLevel();