kc3-lang/angle/src/compiler/translator/IntermNode_util.h

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• Hash : 977ee7eb
  Author :
  Date : 2017-07-21T11:38:27
  

  Add gl_ViewportIndex to the symbol table
  
  gl_ViewportIndex is a GLSL built-in that's needed to implement
  instanced multiview. It is a bit of a special case: it only exists in
  desktop GLSL and not ESSL, and it shouldn't be exposed to the parser.
  We add a new level to the symbol table that's hidden from the parser
  to make adding this kind of builtins in AST transforms consistent with
  the way ESSL builtins are supported.
  
  BUG=angleproject:1490
  TEST=angle_unittests
  
  Change-Id: I51b2d983950b38c8e85e4b6ed00c6b39f9b3cb03
  Reviewed-on: https://chromium-review.googlesource.com/580953
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/IntermNode_util.h

• //
  // Copyright (c) 2017 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.
  //
  // IntermNode_util.h: High-level utilities for creating AST nodes and node hierarchies. Mostly meant
  // to be used in AST transforms.
  
  #ifndef COMPILER_TRANSLATOR_INTERMNODEUTIL_H_
  #define COMPILER_TRANSLATOR_INTERMNODEUTIL_H_
  
  #include "compiler/translator/IntermNode.h"
  
  namespace sh
  {
  
  TIntermFunctionPrototype *CreateInternalFunctionPrototypeNode(const TType &returnType,
                                                                const char *name,
                                                                const TSymbolUniqueId &functionId);
  TIntermFunctionDefinition *CreateInternalFunctionDefinitionNode(const TType &returnType,
                                                                  const char *name,
                                                                  TIntermBlock *functionBody,
                                                                  const TSymbolUniqueId &functionId);
  TIntermAggregate *CreateInternalFunctionCallNode(const TType &returnType,
                                                   const char *name,
                                                   const TSymbolUniqueId &functionId,
                                                   TIntermSequence *arguments);
  
  TIntermTyped *CreateZeroNode(const TType &type);
  TIntermConstantUnion *CreateIndexNode(int index);
  TIntermConstantUnion *CreateBoolNode(bool value);
  
  // If the input node is nullptr, return nullptr.
  // If the input node is a block node, return it.
  // If the input node is not a block node, put it inside a block node and return that.
  TIntermBlock *EnsureBlock(TIntermNode *node);
  
  // Should be called from inside Compiler::compileTreeImpl() where the global level is in scope.
  TIntermSymbol *ReferenceGlobalVariable(const TString &name, const TSymbolTable &symbolTable);
  
  // Note: this can access desktop GLSL built-ins that are hidden from the parser.
  TIntermSymbol *ReferenceBuiltInVariable(const TString &name,
                                          const TSymbolTable &symbolTable,
                                          int shaderVersion);
  
  TIntermTyped *CreateBuiltInFunctionCallNode(const TString &name,
                                              TIntermSequence *arguments,
                                              const TSymbolTable &symbolTable,
                                              int shaderVersion);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_INTERMNODEUTIL_H_

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