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

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• Hash : 77ba408a
  Author :
  Date : 2016-12-16T12:01:18
  

  Unify Diagnostics interface
  
  Use the same kind of interface for reporting preprocessor errors as
  for reporting regular compiler errors, and make global errors like
  having too many uniforms also go through Diagnostics. Also don't
  create std::string objects unnecessarily.
  
  Includes cleanups of some dead code related to reporting errors.
  
  BUG=angleproject:1670
  TEST=angle_unittests
  
  Change-Id: I3ee794d32ddeec1826bdf1b76b558f35259f82c0
  Reviewed-on: https://chromium-review.googlesource.com/421527
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/compiler/translator/ValidateOutputs.cpp

• //
  // Copyright (c) 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.
  //
  
  #include "compiler/translator/ValidateOutputs.h"
  #include "compiler/translator/InfoSink.h"
  #include "compiler/translator/InitializeParseContext.h"
  #include "compiler/translator/ParseContext.h"
  
  namespace sh
  {
  
  namespace
  {
  void error(const TIntermSymbol &symbol, const char *reason, TDiagnostics *diagnostics)
  {
      diagnostics->error(symbol.getLine(), reason, symbol.getSymbol().c_str());
  }
  
  }  // namespace
  
  ValidateOutputs::ValidateOutputs(const TExtensionBehavior &extBehavior, int maxDrawBuffers)
      : TIntermTraverser(true, false, false),
        mMaxDrawBuffers(maxDrawBuffers),
        mAllowUnspecifiedOutputLocationResolution(
            IsExtensionEnabled(extBehavior, "GL_EXT_blend_func_extended"))
  {
  }
  
  void ValidateOutputs::visitSymbol(TIntermSymbol *symbol)
  {
      TString name         = symbol->getSymbol();
      TQualifier qualifier = symbol->getQualifier();
  
      if (mVisitedSymbols.count(name.c_str()) == 1)
          return;
  
      mVisitedSymbols.insert(name.c_str());
  
      if (qualifier == EvqFragmentOut)
      {
          if (symbol->getType().getLayoutQualifier().location == -1)
          {
              mUnspecifiedLocationOutputs.push_back(symbol);
          }
          else
          {
              mOutputs.push_back(symbol);
          }
      }
  }
  
  void ValidateOutputs::validate(TDiagnostics *diagnostics) const
  {
      ASSERT(diagnostics);
      OutputVector validOutputs(mMaxDrawBuffers);
  
      for (const auto &symbol : mOutputs)
      {
          const TType &type         = symbol->getType();
          const size_t elementCount = static_cast<size_t>(type.isArray() ? type.getArraySize() : 1u);
          const size_t location     = static_cast<size_t>(type.getLayoutQualifier().location);
  
          ASSERT(type.getLayoutQualifier().location != -1);
  
          if (location + elementCount <= validOutputs.size())
          {
              for (size_t elementIndex = 0; elementIndex < elementCount; elementIndex++)
              {
                  const size_t offsetLocation = location + elementIndex;
                  if (validOutputs[offsetLocation])
                  {
                      std::stringstream strstr;
                      strstr << "conflicting output locations with previously defined output '"
                             << validOutputs[offsetLocation]->getSymbol() << "'";
                      error(*symbol, strstr.str().c_str(), diagnostics);
                  }
                  else
                  {
                      validOutputs[offsetLocation] = symbol;
                  }
              }
          }
          else
          {
              if (elementCount > 0)
              {
                  error(*symbol,
                        elementCount > 1 ? "output array locations would exceed MAX_DRAW_BUFFERS"
                                         : "output location must be < MAX_DRAW_BUFFERS",
                        diagnostics);
              }
          }
      }
  
      if (!mAllowUnspecifiedOutputLocationResolution &&
          ((!mOutputs.empty() && !mUnspecifiedLocationOutputs.empty()) ||
           mUnspecifiedLocationOutputs.size() > 1))
      {
          for (const auto &symbol : mUnspecifiedLocationOutputs)
          {
              error(*symbol,
                    "must explicitly specify all locations when using multiple fragment outputs",
                    diagnostics);
          }
      }
  }
  
  }  // namespace sh
  

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