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

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• Hash : dadd1986
  Author :
  Date : 2020-04-21T01:50:00
  

  Implement GL_APPLE_clip_distance
  
  - Built-in variable gl_ClipDistance has been added to compiler.
  - Desktop GL: gl_ClipDistance is supported since GL 3.0. Enable/Disable
  each gl_ClipDistances[i] works out of the box via glEnable().
  - Vulkan/Metal: Use uniform variable to control writing to each
  gl_ClipDistance. One bit flag controls one element in the gl_ClipDistance
  array. The writing to the disabled element in vertex shader will be
  ignored, and turned into zero assignment instead.
  - Direct3D/Mobile GL: Not implemented yet.
  - Added ClipDistanceTest to gl_tests and compiler unittests.
  - GL_APPLE_clip_distance is a subset of GL_EXT_clip_cull_distance, so
  GL_EXT_clip_cull_distance could be implemented in future if needed.
  
  Bug: angleproject:4452
  Change-Id: I571ac8b56826989808a680226a04bec4cf59988e
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2084324
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/tree_util/IntermNode_util.h

• //
  // Copyright 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"
  #include "compiler/translator/tree_util/FindFunction.h"
  
  namespace sh
  {
  
  class TSymbolTable;
  class TVariable;
  
  TIntermFunctionPrototype *CreateInternalFunctionPrototypeNode(const TFunction &func);
  TIntermFunctionDefinition *CreateInternalFunctionDefinitionNode(const TFunction &func,
                                                                  TIntermBlock *functionBody);
  
  TIntermTyped *CreateZeroNode(const TType &type);
  TIntermConstantUnion *CreateFloatNode(float value);
  TIntermConstantUnion *CreateIndexNode(int index);
  TIntermConstantUnion *CreateUIntNode(unsigned int value);
  TIntermConstantUnion *CreateBoolNode(bool value);
  
  TVariable *CreateTempVariable(TSymbolTable *symbolTable, const TType *type);
  TVariable *CreateTempVariable(TSymbolTable *symbolTable, const TType *type, TQualifier qualifier);
  
  TIntermSymbol *CreateTempSymbolNode(const TVariable *tempVariable);
  TIntermDeclaration *CreateTempDeclarationNode(const TVariable *tempVariable);
  TIntermDeclaration *CreateTempInitDeclarationNode(const TVariable *tempVariable,
                                                    TIntermTyped *initializer);
  TIntermBinary *CreateTempAssignmentNode(const TVariable *tempVariable, TIntermTyped *rightNode);
  
  TVariable *DeclareTempVariable(TSymbolTable *symbolTable,
                                 const TType *type,
                                 TQualifier qualifier,
                                 TIntermDeclaration **declarationOut);
  TVariable *DeclareTempVariable(TSymbolTable *symbolTable,
                                 TIntermTyped *initializer,
                                 TQualifier qualifier,
                                 TIntermDeclaration **declarationOut);
  const TVariable *DeclareInterfaceBlock(TIntermBlock *root,
                                         TSymbolTable *symbolTable,
                                         TFieldList *fieldList,
                                         TQualifier qualifier,
                                         const TMemoryQualifier &memoryQualifier,
                                         uint32_t arraySize,
                                         const ImmutableString &blockTypeName,
                                         const ImmutableString &blockVariableName);
  
  // 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 ImmutableString &name,
                                         const TSymbolTable &symbolTable);
  
  // Note: this can't access desktop GLSL built-ins. Those can only be accessed directly through
  // BuiltIn.h.
  TIntermSymbol *ReferenceBuiltInVariable(const ImmutableString &name,
                                          const TSymbolTable &symbolTable,
                                          int shaderVersion);
  
  TIntermTyped *CreateBuiltInFunctionCallNode(const char *name,
                                              TIntermSequence *arguments,
                                              const TSymbolTable &symbolTable,
                                              int shaderVersion);
  
  inline void GetSwizzleIndex(TVector<int> *indexOut) {}
  
  template <typename T, typename... ArgsT>
  void GetSwizzleIndex(TVector<int> *indexOut, T arg, ArgsT... args)
  {
      indexOut->push_back(arg);
      GetSwizzleIndex(indexOut, args...);
  }
  
  template <typename... ArgsT>
  TIntermSwizzle *CreateSwizzle(TIntermTyped *reference, ArgsT... args)
  {
      TVector<int> swizzleIndex;
      GetSwizzleIndex(&swizzleIndex, args...);
      return new TIntermSwizzle(reference, swizzleIndex);
  }
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_INTERMNODEUTIL_H_
  

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