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

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• Hash : abe96578
  Author :
  Date : 2020-11-30T14:09:11
  

  Vulkan: I/O blocks: Support unsized arrays
  
  Geometry shader inputs have an extra array dimension, which can be
  unsized as it can be derived from the primitive type.  This change fixes
  the grammar to support such arrays.
  
  Additionally, it enables EXT_shader_io_blocks automatically with
  EXT_geometry_shader and EXT_tessellation_shader per spec.
  
  Bug: angleproject:3580
  Change-Id: Ia7eb3e8be28c2eef2072dbe2a546fa34973104ab
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2568242
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Mohan Maiya <m.maiya@samsung.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/compiler/translator/DirectiveHandler.cpp

• //
  // Copyright 2012 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 "angle_gl.h"
  #include "common/debug.h"
  #include "compiler/translator/Common.h"
  #include "compiler/translator/Diagnostics.h"
  
  namespace sh
  {
  
  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,
                                       sh::GLenum shaderType,
                                       bool debugShaderPrecisionSupported)
      : mExtensionBehavior(extBehavior),
        mDiagnostics(diagnostics),
        mShaderVersion(shaderVersion),
        mShaderType(shaderType),
        mDebugShaderPrecisionSupported(debugShaderPrecisionSupported)
  {}
  
  TDirectiveHandler::~TDirectiveHandler() {}
  
  void TDirectiveHandler::handleError(const angle::pp::SourceLocation &loc, const std::string &msg)
  {
      mDiagnostics.error(loc, msg.c_str(), "");
  }
  
  void TDirectiveHandler::handlePragma(const angle::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)
          {
              if (mShaderVersion == 300 && mShaderType == GL_FRAGMENT_SHADER)
              {
                  // ESSL 3.00.4 section 4.6.1
                  mDiagnostics.error(
                      loc, "#pragma STDGL invariant(all) can not be used in fragment shader",
                      name.c_str());
              }
              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 kDebugShaderPrecision[] = "webgl_debug_shader_precision";
          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 if (name == kDebugShaderPrecision && mDebugShaderPrecisionSupported)
          {
              if (value == kOn)
                  mPragma.debugShaderPrecision = true;
              else if (value == kOff)
                  mPragma.debugShaderPrecision = false;
              else
                  invalidValue = true;
          }
          else
          {
              mDiagnostics.report(angle::pp::Diagnostics::PP_UNRECOGNIZED_PRAGMA, loc, name);
              return;
          }
  
          if (invalidValue)
          {
              mDiagnostics.error(loc, "invalid pragma value - 'on' or 'off' expected", value.c_str());
          }
      }
  }
  
  void TDirectiveHandler::handleExtension(const angle::pp::SourceLocation &loc,
                                          const std::string &name,
                                          const std::string &behavior)
  {
      const char kExtAll[] = "all";
  
      TBehavior behaviorVal = getBehavior(behavior);
      if (behaviorVal == EBhUndefined)
      {
          mDiagnostics.error(loc, "behavior invalid", name.c_str());
          return;
      }
  
      if (name == kExtAll)
      {
          if (behaviorVal == EBhRequire)
          {
              mDiagnostics.error(loc, "extension cannot have 'require' behavior", name.c_str());
          }
          else if (behaviorVal == EBhEnable)
          {
              mDiagnostics.error(loc, "extension cannot have 'enable' behavior", name.c_str());
          }
          else
          {
              for (TExtensionBehavior::iterator iter = mExtensionBehavior.begin();
                   iter != mExtensionBehavior.end(); ++iter)
                  iter->second = behaviorVal;
          }
          return;
      }
  
      TExtensionBehavior::iterator iter = mExtensionBehavior.find(GetExtensionByName(name.c_str()));
      if (iter != mExtensionBehavior.end())
      {
          iter->second = behaviorVal;
          // OVR_multiview is implicitly enabled when OVR_multiview2 is enabled
          if (name == "GL_OVR_multiview2")
          {
              constexpr char kMultiviewExtName[] = "GL_OVR_multiview";
              iter = mExtensionBehavior.find(GetExtensionByName(kMultiviewExtName));
              if (iter != mExtensionBehavior.end())
              {
                  iter->second = behaviorVal;
              }
          }
          // EXT_shader_io_blocks is implicitly enabled when EXT_geometry_shader or
          // EXT_tessellation_shader is enabled.
          if (name == "GL_EXT_geometry_shader" || name == "GL_EXT_tessellation_shader")
          {
              constexpr char kIOBlocksExtName[] = "GL_EXT_shader_io_blocks";
              iter = mExtensionBehavior.find(GetExtensionByName(kIOBlocksExtName));
              if (iter != mExtensionBehavior.end())
              {
                  iter->second = behaviorVal;
              }
          }
          return;
      }
  
      switch (behaviorVal)
      {
          case EBhRequire:
              mDiagnostics.error(loc, "extension is not supported", name.c_str());
              break;
          case EBhEnable:
          case EBhWarn:
          case EBhDisable:
              mDiagnostics.warning(loc, "extension is not supported", name.c_str());
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void TDirectiveHandler::handleVersion(const angle::pp::SourceLocation &loc,
                                        int version,
                                        ShShaderSpec spec)
  {
      if (((version == 100 || version == 300 || version == 310 || version == 320) &&
           !IsDesktopGLSpec(spec)) ||
          IsDesktopGLSpec(spec))
      {
          mShaderVersion = version;
      }
      else
      {
          std::stringstream stream = sh::InitializeStream<std::stringstream>();
          stream << version;
          std::string str = stream.str();
          mDiagnostics.error(loc, "client/version number not supported", str.c_str());
      }
  }
  
  }  // namespace sh
  

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