kc3-lang/angle/src/common/gl_enum_utils.cpp

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• Hash : cd10b6d2
  Author :
  Date : 2022-10-10T21:00:07
  

  Enum Utils: Add method to return enum value from string.
  
  We'll use this in the trace interpreter to parse enum values.
  
  Bug: angleproject:7752
  Change-Id: I232a00baac2f74c9618029929bbb3e5822654046
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3963366
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  Reviewed-by: Yuxin Hu <yuxinhu@google.com>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/common/gl_enum_utils.cpp

• //
  // Copyright 2019 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.
  //
  // gl_enum_utils.cpp:
  //   Utility functions for converting GLenums to string.
  
  #include "common/gl_enum_utils.h"
  
  #include "common/bitset_utils.h"
  #include "common/string_utils.h"
  
  #include <iomanip>
  #include <sstream>
  
  namespace gl
  {
  namespace
  {
  
  template <typename EnumType>
  void OutputGLenumStringImpl(std::ostream &out, EnumType enumGroup, unsigned int value)
  {
      const char *enumStr = GLenumToString(enumGroup, value);
      if (enumStr != kUnknownGLenumString)
      {
          out << enumStr;
          return;
      }
  
      if (enumGroup == EnumType::Boolean)
      {
          // If an unknown enum was submitted as GLboolean, just write out the value.
          if (enumStr == kUnknownGLenumString)
          {
              out << value;
          }
          else
          {
              out << enumStr;
          }
  
          return;
      }
  
      if (enumGroup != EnumType::AllEnums)
      {
          // Retry with the "Default" group
          enumStr = GLenumToString(EnumType::AllEnums, value);
          if (enumStr != kUnknownGLenumString)
          {
              out << enumStr;
              return;
          }
      }
  
      out << std::hex << "0x" << std::setfill('0') << std::setw(4) << value << std::dec;
  }
  
  template <typename EnumType>
  std::string GLbitfieldToStringImpl(EnumType enumGroup, unsigned int value)
  {
      std::stringstream st;
  
      if (value == 0)
      {
          return "0";
      }
  
      const angle::BitSet<32> bitSet(value);
      bool first = true;
      for (const auto index : bitSet)
      {
          if (!first)
          {
              st << " | ";
          }
          first = false;
  
          unsigned int mask = 1u << index;
          OutputGLenumString(st, enumGroup, mask);
      }
  
      return st.str();
  }
  }  // namespace
  
  const char kUnknownGLenumString[] = "EnumUnknown";
  
  void OutputGLenumString(std::ostream &out, GLESEnum enumGroup, unsigned int value)
  {
      return OutputGLenumStringImpl(out, enumGroup, value);
  }
  
  void OutputGLenumString(std::ostream &out, BigGLEnum enumGroup, unsigned int value)
  {
      return OutputGLenumStringImpl(out, enumGroup, value);
  }
  
  void OutputGLbitfieldString(std::ostream &out, GLESEnum enumGroup, unsigned int value)
  {
      out << GLbitfieldToString(enumGroup, value);
  }
  
  const char *GLbooleanToString(unsigned int value)
  {
      return GLenumToString(GLESEnum::Boolean, value);
  }
  
  std::string GLbitfieldToString(GLESEnum enumGroup, unsigned int value)
  {
      return GLbitfieldToStringImpl(enumGroup, value);
  }
  
  std::string GLbitfieldToString(BigGLEnum enumGroup, unsigned int value)
  {
      return GLbitfieldToStringImpl(enumGroup, value);
  }
  
  const char *GLinternalFormatToString(unsigned int format)
  {
      return GLenumToString(gl::GLESEnum::InternalFormat, format);
  }
  
  unsigned int StringToGLbitfield(const char *str)
  {
      unsigned int value = 0;
      std::vector<std::string> strings =
          angle::SplitString(str, " |", angle::WhitespaceHandling::TRIM_WHITESPACE,
                             angle::SplitResult::SPLIT_WANT_NONEMPTY);
      for (const std::string &enumString : strings)
      {
          value |= StringToGLenum(enumString.c_str());
      }
      return value;
  }
  }  // namespace gl
  

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