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

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• Author : Shahbaz Youssefi
  Date : 2021-07-29 12:38:21
  Hash : 96ccf3f4
  Message : Translator: Consolidate EvqFragDepth and EvqFragDepthEXT They were the same thing. Fixes SPIR-V generation which only handled EvqFragDepth. Bug: angleproject:4889 Change-Id: Id2c35f4c5a26e43ad16a420cc0306756a1add082 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3059922 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

• src/compiler/translator/ValidateOutputs.cpp

• //
  // Copyright 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.
  //
  // ValidateOutputs validates fragment shader outputs. It checks for conflicting locations,
  // out-of-range locations, that locations are specified when using multiple outputs, and YUV output
  // validity.
  
  #include "compiler/translator/ValidateOutputs.h"
  
  #include <set>
  
  #include "compiler/translator/InfoSink.h"
  #include "compiler/translator/ParseContext.h"
  #include "compiler/translator/tree_util/IntermTraverse.h"
  
  namespace sh
  {
  
  namespace
  {
  
  void error(const TIntermSymbol &symbol, const char *reason, TDiagnostics *diagnostics)
  {
      diagnostics->error(symbol.getLine(), reason, symbol.getName().data());
  }
  
  class ValidateOutputsTraverser : public TIntermTraverser
  {
    public:
      ValidateOutputsTraverser(const TExtensionBehavior &extBehavior, int maxDrawBuffers);
  
      void validate(TDiagnostics *diagnostics) const;
  
      void visitSymbol(TIntermSymbol *) override;
  
    private:
      int mMaxDrawBuffers;
      bool mAllowUnspecifiedOutputLocationResolution;
      bool mUsesFragDepth;
  
      typedef std::vector<TIntermSymbol *> OutputVector;
      OutputVector mOutputs;
      OutputVector mUnspecifiedLocationOutputs;
      OutputVector mYuvOutputs;
      std::set<int> mVisitedSymbols;  // Visited symbol ids.
  };
  
  ValidateOutputsTraverser::ValidateOutputsTraverser(const TExtensionBehavior &extBehavior,
                                                     int maxDrawBuffers)
      : TIntermTraverser(true, false, false),
        mMaxDrawBuffers(maxDrawBuffers),
        mAllowUnspecifiedOutputLocationResolution(
            IsExtensionEnabled(extBehavior, TExtension::EXT_blend_func_extended)),
        mUsesFragDepth(false)
  {}
  
  void ValidateOutputsTraverser::visitSymbol(TIntermSymbol *symbol)
  {
      if (symbol->variable().symbolType() == SymbolType::Empty)
          return;
  
      if (mVisitedSymbols.count(symbol->uniqueId().get()) == 1)
          return;
  
      mVisitedSymbols.insert(symbol->uniqueId().get());
  
      TQualifier qualifier = symbol->getQualifier();
      if (qualifier == EvqFragmentOut)
      {
          if (symbol->getType().getLayoutQualifier().location != -1)
          {
              mOutputs.push_back(symbol);
          }
          else if (symbol->getType().getLayoutQualifier().yuv == true)
          {
              mYuvOutputs.push_back(symbol);
          }
          else
          {
              mUnspecifiedLocationOutputs.push_back(symbol);
          }
      }
      else if (qualifier == EvqFragDepth)
      {
          mUsesFragDepth = true;
      }
  }
  
  void ValidateOutputsTraverser::validate(TDiagnostics *diagnostics) const
  {
      ASSERT(diagnostics);
      OutputVector validOutputs(mMaxDrawBuffers, nullptr);
      OutputVector validSecondaryOutputs(mMaxDrawBuffers, nullptr);
  
      for (const auto &symbol : mOutputs)
      {
          const TType &type = symbol->getType();
          ASSERT(!type.isArrayOfArrays());  // Disallowed in GLSL ES 3.10 section 4.3.6.
          const size_t elementCount =
              static_cast<size_t>(type.isArray() ? type.getOutermostArraySize() : 1u);
          const size_t location = static_cast<size_t>(type.getLayoutQualifier().location);
  
          ASSERT(type.getLayoutQualifier().location != -1);
  
          OutputVector *validOutputsToUse = &validOutputs;
          // The default index is 0, so we only assign the output to secondary outputs in case the
          // index is explicitly set to 1.
          if (type.getLayoutQualifier().index == 1)
          {
              validOutputsToUse = &validSecondaryOutputs;
          }
  
          if (location + elementCount <= validOutputsToUse->size())
          {
              for (size_t elementIndex = 0; elementIndex < elementCount; elementIndex++)
              {
                  const size_t offsetLocation = location + elementIndex;
                  if ((*validOutputsToUse)[offsetLocation])
                  {
                      std::stringstream strstr = sh::InitializeStream<std::stringstream>();
                      strstr << "conflicting output locations with previously defined output '"
                             << (*validOutputsToUse)[offsetLocation]->getName() << "'";
                      error(*symbol, strstr.str().c_str(), diagnostics);
                  }
                  else
                  {
                      (*validOutputsToUse)[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);
          }
      }
  
      if (!mYuvOutputs.empty() && (mYuvOutputs.size() > 1 || mUsesFragDepth || !mOutputs.empty() ||
                                   !mUnspecifiedLocationOutputs.empty()))
      {
          for (const auto &symbol : mYuvOutputs)
          {
              error(*symbol,
                    "not allowed to specify yuv qualifier when using depth or multiple color "
                    "fragment outputs",
                    diagnostics);
          }
      }
  }
  
  }  // anonymous namespace
  
  bool ValidateOutputs(TIntermBlock *root,
                       const TExtensionBehavior &extBehavior,
                       int maxDrawBuffers,
                       TDiagnostics *diagnostics)
  {
      ValidateOutputsTraverser validateOutputs(extBehavior, maxDrawBuffers);
      root->traverse(&validateOutputs);
      int numErrorsBefore = diagnostics->numErrors();
      validateOutputs.validate(diagnostics);
      return (diagnostics->numErrors() == numErrorsBefore);
  }
  
  }  // namespace sh