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

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• Hash : 94ac7b78
  Author :
  Date : 2014-10-15T18:22:08
  

  Invariant related processing.
  
  * Fix a bug in PreProcessor for STDGL pragma.
  * Record all invariant settings and set them in ShaderVariable.
  * Write #pragma STDGL invariant(all) in GL
  
  BUG=angle:776
  TEST=https://www.khronos.org/registry/webgl/sdk/tests/conformance/glsl/misc/shaders-with-invariance.html
  
  Change-Id: Ie28b75480deed79f0c9f26e3b98f1778d1290182
  Reviewed-on: https://chromium-review.googlesource.com/223610
  Tested-by: Zhenyao Mo <zmo@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/DirectiveHandler.cpp

• //
  // Copyright (c) 2012-2013 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/DirectiveHandler.h"
  
  #include <sstream>
  
  #include "compiler/translator/compilerdebug.h"
  #include "compiler/translator/Diagnostics.h"
  
  static TBehavior getBehavior(const std::string& str)
  {
      const char kRequire[] = "require";
      const char kEnable[] = "enable";
      const char kDisable[] = "disable";
      const char kWarn[] = "warn";
  
      if (str == kRequire) return EBhRequire;
      else if (str == kEnable) return EBhEnable;
      else if (str == kDisable) return EBhDisable;
      else if (str == kWarn) return EBhWarn;
      return EBhUndefined;
  }
  
  TDirectiveHandler::TDirectiveHandler(TExtensionBehavior& extBehavior,
                                       TDiagnostics& diagnostics,
                                       int& shaderVersion)
      : mExtensionBehavior(extBehavior),
        mDiagnostics(diagnostics),
        mShaderVersion(shaderVersion)
  {
  }
  
  TDirectiveHandler::~TDirectiveHandler()
  {
  }
  
  void TDirectiveHandler::handleError(const pp::SourceLocation& loc,
                                      const std::string& msg)
  {
      mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc, msg, "", "");
  }
  
  void TDirectiveHandler::handlePragma(const pp::SourceLocation& loc,
                                       const std::string& name,
                                       const std::string& value,
                                       bool stdgl)
  {
      if (stdgl)
      {
          const char kInvariant[] = "invariant";
          const char kAll[] = "all";
  
          if (name == kInvariant && value == kAll)
              mPragma.stdgl.invariantAll = true;
          // The STDGL pragma is used to reserve pragmas for use by future
          // revisions of GLSL.  Do not generate an error on unexpected
          // name and value.
          return;
      }
      else
      {
          const char kOptimize[] = "optimize";
          const char kDebug[] = "debug";
          const char kOn[] = "on";
          const char kOff[] = "off";
  
          bool invalidValue = false;
          if (name == kOptimize)
          {
              if (value == kOn) mPragma.optimize = true;
              else if (value == kOff) mPragma.optimize = false;
              else invalidValue = true;
          }
          else if (name == kDebug)
          {
              if (value == kOn) mPragma.debug = true;
              else if (value == kOff) mPragma.debug = false;
              else invalidValue = true;
          }
          else
          {
              mDiagnostics.report(pp::Diagnostics::PP_UNRECOGNIZED_PRAGMA, loc, name);
              return;
          }
  
          if (invalidValue)
          {
              mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
                                     "invalid pragma value", value,
                                     "'on' or 'off' expected");
          }
      }
  }
  
  void TDirectiveHandler::handleExtension(const pp::SourceLocation& loc,
                                          const std::string& name,
                                          const std::string& behavior)
  {
      const char kExtAll[] = "all";
  
      TBehavior behaviorVal = getBehavior(behavior);
      if (behaviorVal == EBhUndefined)
      {
          mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
                                 "behavior", name, "invalid");
          return;
      }
  
      if (name == kExtAll)
      {
          if (behaviorVal == EBhRequire)
          {
              mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
                                     "extension", name,
                                     "cannot have 'require' behavior");
          }
          else if (behaviorVal == EBhEnable)
          {
              mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
                                     "extension", name,
                                     "cannot have 'enable' behavior");
          }
          else
          {
              for (TExtensionBehavior::iterator iter = mExtensionBehavior.begin();
                   iter != mExtensionBehavior.end(); ++iter)
                  iter->second = behaviorVal;
          }
          return;
      }
  
      TExtensionBehavior::iterator iter = mExtensionBehavior.find(name);
      if (iter != mExtensionBehavior.end())
      {
          iter->second = behaviorVal;
          return;
      }
  
      pp::Diagnostics::Severity severity = pp::Diagnostics::PP_ERROR;
      switch (behaviorVal) {
        case EBhRequire:
          severity = pp::Diagnostics::PP_ERROR;
          break;
        case EBhEnable:
        case EBhWarn:
        case EBhDisable:
          severity = pp::Diagnostics::PP_WARNING;
          break;
        default:
          UNREACHABLE();
          break;
      }
      mDiagnostics.writeInfo(severity, loc,
                             "extension", name, "is not supported");
  }
  
  void TDirectiveHandler::handleVersion(const pp::SourceLocation& loc,
                                        int version)
  {
      if (version == 100 ||
          version == 300)
      {
          mShaderVersion = version;
      }
      else
      {
          std::stringstream stream;
          stream << version;
          std::string str = stream.str();
          mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
                                 "version number", str, "not supported");
      }
  }
  

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