kc3-lang/angle/src/compiler/translator/UseInterfaceBlockFields.cpp

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• Hash : daaff1cc
  Author :
  Date : 2017-07-05T18:03:26
  

  Set correct symbol ids when referring to GLSL built-ins
  
  The symbol ids are fetched from the symbol table. A new utility
  function is added to make this more convenient.
  
  BUG=angleproject:1490
  TEST=angle_unittests, angle_end2end_tests
  
  Change-Id: I780430e3386f6599503d8290c568ca9bc9cad147
  Reviewed-on: https://chromium-review.googlesource.com/559535
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/UseInterfaceBlockFields.cpp

• //
  // Copyright 2016 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.
  //
  
  // UseInterfaceBlockFields.cpp: insert statements to reference all members in InterfaceBlock list at
  // the beginning of main. This is to work around a Mac driver that treats unused standard/shared
  // uniform blocks as inactive.
  
  #include "compiler/translator/UseInterfaceBlockFields.h"
  
  #include "compiler/translator/FindMain.h"
  #include "compiler/translator/IntermNode.h"
  #include "compiler/translator/IntermNode_util.h"
  #include "compiler/translator/SymbolTable.h"
  #include "compiler/translator/util.h"
  
  namespace sh
  {
  
  namespace
  {
  
  void AddFieldUseStatements(const ShaderVariable &var,
                             TIntermSequence *sequence,
                             const TSymbolTable &symbolTable)
  {
      TString name = TString(var.name.c_str());
      if (var.isArray())
      {
          size_t pos = name.find_last_of('[');
          if (pos != TString::npos)
          {
              name = name.substr(0, pos);
          }
      }
      TIntermSymbol *symbol = ReferenceGlobalVariable(name, symbolTable);
      if (var.isArray())
      {
          for (unsigned int i = 0u; i < var.arraySize; ++i)
          {
              TIntermBinary *element =
                  new TIntermBinary(EOpIndexDirect, symbol->deepCopy(), CreateIndexNode(i));
              sequence->insert(sequence->begin(), element);
          }
      }
      else
      {
          sequence->insert(sequence->begin(), symbol);
      }
  }
  
  void InsertUseCode(const InterfaceBlock &block, TIntermTyped *blockNode, TIntermSequence *sequence)
  {
      for (unsigned int i = 0; i < block.fields.size(); ++i)
      {
          TIntermBinary *element = new TIntermBinary(EOpIndexDirectInterfaceBlock,
                                                     blockNode->deepCopy(), CreateIndexNode(i));
          sequence->insert(sequence->begin(), element);
      }
  }
  
  void InsertUseCode(TIntermSequence *sequence,
                     const InterfaceBlockList &blocks,
                     const TSymbolTable &symbolTable)
  {
      for (const auto &block : blocks)
      {
          if (block.instanceName.empty())
          {
              for (const auto &var : block.fields)
              {
                  AddFieldUseStatements(var, sequence, symbolTable);
              }
          }
          else if (block.arraySize > 0u)
          {
              TString name(block.instanceName.c_str());
              TIntermSymbol *arraySymbol = ReferenceGlobalVariable(name, symbolTable);
              for (unsigned int i = 0u; i < block.arraySize; ++i)
              {
                  TIntermBinary *elementSymbol =
                      new TIntermBinary(EOpIndexDirect, arraySymbol->deepCopy(), CreateIndexNode(i));
                  InsertUseCode(block, elementSymbol, sequence);
              }
          }
          else
          {
              TString name(block.instanceName.c_str());
              TIntermSymbol *blockSymbol = ReferenceGlobalVariable(name, symbolTable);
              InsertUseCode(block, blockSymbol, sequence);
          }
      }
  }
  
  }  // namespace anonymous
  
  void UseInterfaceBlockFields(TIntermBlock *root,
                               const InterfaceBlockList &blocks,
                               const TSymbolTable &symbolTable)
  {
      TIntermBlock *mainBody = FindMainBody(root);
      InsertUseCode(mainBody->getSequence(), blocks, symbolTable);
  }
  
  }  // namespace sh
  

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