kc3-lang/angle/src/libANGLE/queryconversions.h

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• Hash : bd4e756a
  Author :
  Date : 2020-02-17T09:49:45
  

  Const-ify the validation layer.
  
  Enforces that the validation layers should be working pretty much read-
  only with the exeption of updating caches. Requires a few tricks:
  
   - updates EP code generation to add 'const' to pointer parameters
   - enables a kludge const_cast to enable the robust query extension
   - makes some members of Framebuffer mutable to work around syncState
   - makes 'is' queries and other methods in Context/State const
  
  Will allow us to more safely expose the no_error extension.
  
  Bug: angleproject:1280
  Change-Id: Id9756757854c9e68fc096ecec8d93759fbe6b3a4
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2060689
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/queryconversions.h

• //
  // Copyright 2014 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.
  //
  
  // queryconversions.h: Declaration of state query cast conversions
  
  #ifndef LIBANGLE_QUERY_CONVERSIONS_H_
  #define LIBANGLE_QUERY_CONVERSIONS_H_
  
  #include "angle_gl.h"
  #include "common/angleutils.h"
  
  namespace gl
  {
  class Context;
  
  // Helper class for converting a GL type to a GLenum:
  // We can't use CastStateValueEnum generally, because of GLboolean + GLubyte overlap.
  // We restrict our use to CastFromStateValue and CastQueryValueTo, where it eliminates
  // duplicate parameters.
  
  template <typename GLType>
  struct GLTypeToGLenum
  {
      // static constexpr GLenum value;
  };
  
  template <>
  struct GLTypeToGLenum<GLint>
  {
      static constexpr GLenum value = GL_INT;
  };
  template <>
  struct GLTypeToGLenum<GLuint>
  {
      static constexpr GLenum value = GL_UNSIGNED_INT;
  };
  template <>
  struct GLTypeToGLenum<GLboolean>
  {
      static constexpr GLenum value = GL_BOOL;
  };
  template <>
  struct GLTypeToGLenum<GLint64>
  {
      static constexpr GLenum value = GL_INT_64_ANGLEX;
  };
  template <>
  struct GLTypeToGLenum<GLuint64>
  {
      static constexpr GLenum value = GL_UINT_64_ANGLEX;
  };
  template <>
  struct GLTypeToGLenum<GLfloat>
  {
      static constexpr GLenum value = GL_FLOAT;
  };
  
  GLint CastMaskValue(GLuint value);
  
  template <typename QueryT, typename InternalT>
  QueryT CastFromGLintStateValue(GLenum pname, InternalT value);
  
  template <typename QueryT, typename NativeT>
  QueryT CastFromStateValue(GLenum pname, NativeT value);
  
  template <typename NativeT, typename QueryT>
  NativeT CastQueryValueTo(GLenum pname, QueryT value);
  
  template <typename ParamType>
  GLenum ConvertToGLenum(GLenum pname, ParamType param)
  {
      return static_cast<GLenum>(CastQueryValueTo<GLuint>(pname, param));
  }
  
  template <typename ParamType>
  GLenum ConvertToGLenum(ParamType param)
  {
      return ConvertToGLenum(GL_NONE, param);
  }
  
  template <typename OutType>
  OutType ConvertGLenum(GLenum param)
  {
      return static_cast<OutType>(param);
  }
  
  template <typename InType, typename OutType>
  void ConvertGLenumValue(InType param, OutType *out)
  {
      *out = ConvertGLenum<OutType>(static_cast<GLenum>(param));
  }
  
  template <typename PackedEnumType, typename OutType>
  void ConvertPackedEnum(PackedEnumType param, OutType *out)
  {
      *out = static_cast<OutType>(ToGLenum(param));
  }
  
  template <typename ParamType>
  GLint ConvertToGLint(ParamType param)
  {
      return CastQueryValueTo<GLint>(GL_NONE, param);
  }
  
  template <typename ParamType>
  bool ConvertToBool(ParamType param)
  {
      return param != GL_FALSE;
  }
  
  template <typename ParamType>
  GLboolean ConvertToGLBoolean(ParamType param)
  {
      return param ? GL_TRUE : GL_FALSE;
  }
  
  // The GL state query API types are: bool, int, uint, float, int64, uint64
  template <typename QueryT>
  void CastStateValues(const Context *context,
                       GLenum nativeType,
                       GLenum pname,
                       unsigned int numParams,
                       QueryT *outParams);
  
  // The GL state query API types are: bool, int, uint, float, int64, uint64
  template <typename QueryT>
  void CastIndexedStateValues(Context *context,
                              GLenum nativeType,
                              GLenum pname,
                              GLuint index,
                              unsigned int numParams,
                              QueryT *outParams);
  }  // namespace gl
  
  #endif  // LIBANGLE_QUERY_CONVERSIONS_H_
  

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