Line data    Source code

       1             : //
       2             : // Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
       3             : // Use of this source code is governed by a BSD-style license that can be
       4             : // found in the LICENSE file.
       5             : //
       6             : 
       7             : #include "compiler/translator/ValidateOutputs.h"
       8             : #include "compiler/translator/InfoSink.h"
       9             : #include "compiler/translator/InitializeParseContext.h"
      10             : #include "compiler/translator/ParseContext.h"
      11             : 
      12             : namespace sh
      13             : {
      14             : 
      15             : namespace
      16             : {
      17           0 : void error(int *errorCount, TInfoSinkBase &sink, const TIntermSymbol &symbol, const char *reason)
      18             : {
      19           0 :     sink.prefix(EPrefixError);
      20           0 :     sink.location(symbol.getLine());
      21           0 :     sink << "'" << symbol.getSymbol() << "' : " << reason << "\n";
      22           0 :     (*errorCount)++;
      23           0 : }
      24             : 
      25             : }  // namespace
      26             : 
      27           0 : ValidateOutputs::ValidateOutputs(const TExtensionBehavior &extBehavior, int maxDrawBuffers)
      28             :     : TIntermTraverser(true, false, false),
      29             :       mMaxDrawBuffers(maxDrawBuffers),
      30             :       mAllowUnspecifiedOutputLocationResolution(
      31           0 :           IsExtensionEnabled(extBehavior, "GL_EXT_blend_func_extended"))
      32             : {
      33           0 : }
      34             : 
      35           0 : void ValidateOutputs::visitSymbol(TIntermSymbol *symbol)
      36             : {
      37           0 :     TString name = symbol->getSymbol();
      38           0 :     TQualifier qualifier = symbol->getQualifier();
      39             : 
      40           0 :     if (mVisitedSymbols.count(name.c_str()) == 1)
      41           0 :         return;
      42             : 
      43           0 :     mVisitedSymbols.insert(name.c_str());
      44             : 
      45           0 :     if (qualifier == EvqFragmentOut)
      46             :     {
      47           0 :         if (symbol->getType().getLayoutQualifier().location == -1)
      48             :         {
      49           0 :             mUnspecifiedLocationOutputs.push_back(symbol);
      50             :         }
      51             :         else
      52             :         {
      53           0 :             mOutputs.push_back(symbol);
      54             :         }
      55             :     }
      56             : }
      57             : 
      58           0 : int ValidateOutputs::validateAndCountErrors(TInfoSinkBase &sink) const
      59             : {
      60           0 :     OutputVector validOutputs(mMaxDrawBuffers);
      61           0 :     int errorCount = 0;
      62             : 
      63           0 :     for (const auto &symbol : mOutputs)
      64             :     {
      65           0 :         const TType &type         = symbol->getType();
      66           0 :         const size_t elementCount = static_cast<size_t>(type.isArray() ? type.getArraySize() : 1u);
      67           0 :         const size_t location     = static_cast<size_t>(type.getLayoutQualifier().location);
      68             : 
      69           0 :         ASSERT(type.getLayoutQualifier().location != -1);
      70             : 
      71           0 :         if (location + elementCount <= validOutputs.size())
      72             :         {
      73           0 :             for (size_t elementIndex = 0; elementIndex < elementCount; elementIndex++)
      74             :             {
      75           0 :                 const size_t offsetLocation = location + elementIndex;
      76           0 :                 if (validOutputs[offsetLocation])
      77             :                 {
      78           0 :                     std::stringstream strstr;
      79             :                     strstr << "conflicting output locations with previously defined output '"
      80           0 :                            << validOutputs[offsetLocation]->getSymbol() << "'";
      81           0 :                     error(&errorCount, sink, *symbol, strstr.str().c_str());
      82             :                 }
      83             :                 else
      84             :                 {
      85           0 :                     validOutputs[offsetLocation] = symbol;
      86             :                 }
      87             :             }
      88             :         }
      89             :         else
      90             :         {
      91           0 :             if (elementCount > 0)
      92             :             {
      93           0 :                 error(&errorCount, sink, *symbol,
      94             :                       elementCount > 1 ? "output array locations would exceed MAX_DRAW_BUFFERS"
      95           0 :                                        : "output location must be < MAX_DRAW_BUFFERS");
      96             :             }
      97             :         }
      98             :     }
      99             : 
     100           0 :     if (!mAllowUnspecifiedOutputLocationResolution &&
     101           0 :         ((!mOutputs.empty() && !mUnspecifiedLocationOutputs.empty()) ||
     102           0 :          mUnspecifiedLocationOutputs.size() > 1))
     103             :     {
     104           0 :         for (const auto &symbol : mUnspecifiedLocationOutputs)
     105             :         {
     106           0 :             error(&errorCount, sink, *symbol,
     107           0 :                   "must explicitly specify all locations when using multiple fragment outputs");
     108             :         }
     109             :     }
     110           0 :     return errorCount;
     111             : }
     112             : 
     113             : }  // namespace sh