kc3-lang/angle/src/common/utilities.h

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• Hash : ebebe1c7
  Author :
  Date : 2016-10-14T12:01:31
  

  Implement robust GetBufferParameter entry points.
  
  BUG=angleproject:1354
  
  Change-Id: I979c8768975380dba7f0b256b2729b2147ff7984
  Reviewed-on: https://chromium-review.googlesource.com/399042
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/common/utilities.h

• //
  // Copyright (c) 2002-2013 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.
  //
  
  // utilities.h: Conversion functions and other utility routines.
  
  #ifndef COMMON_UTILITIES_H_
  #define COMMON_UTILITIES_H_
  
  #include <EGL/egl.h>
  #include <EGL/eglext.h>
  
  #include "angle_gl.h"
  #include <string>
  #include <math.h>
  
  #include "common/mathutil.h"
  
  namespace gl
  {
  
  int VariableComponentCount(GLenum type);
  GLenum VariableComponentType(GLenum type);
  size_t VariableComponentSize(GLenum type);
  size_t VariableInternalSize(GLenum type);
  size_t VariableExternalSize(GLenum type);
  GLenum VariableBoolVectorType(GLenum type);
  int VariableRowCount(GLenum type);
  int VariableColumnCount(GLenum type);
  bool IsSamplerType(GLenum type);
  GLenum SamplerTypeToTextureType(GLenum samplerType);
  bool IsMatrixType(GLenum type);
  GLenum TransposeMatrixType(GLenum type);
  int VariableRegisterCount(GLenum type);
  int MatrixRegisterCount(GLenum type, bool isRowMajorMatrix);
  int MatrixComponentCount(GLenum type, bool isRowMajorMatrix);
  int VariableSortOrder(GLenum type);
  
  int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize);
  
  static const GLenum FirstCubeMapTextureTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X;
  static const GLenum LastCubeMapTextureTarget = GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
  bool IsCubeMapTextureTarget(GLenum target);
  size_t CubeMapTextureTargetToLayerIndex(GLenum target);
  GLenum LayerIndexToCubeMapTextureTarget(size_t index);
  
  // Parse the base uniform name and array index.  Returns the base name of the uniform. outSubscript is
  // set to GL_INVALID_INDEX if the provided name is not an array or the array index is invalid.
  std::string ParseUniformName(const std::string &name, size_t *outSubscript);
  
  // Find the range of index values in the provided indices pointer.  Primitive restart indices are
  // only counted in the range if primitive restart is disabled.
  IndexRange ComputeIndexRange(GLenum indexType,
                               const GLvoid *indices,
                               size_t count,
                               bool primitiveRestartEnabled);
  
  // Get the primitive restart index value for the given index type.
  GLuint GetPrimitiveRestartIndex(GLenum indexType);
  
  bool IsTriangleMode(GLenum drawMode);
  
  // [OpenGL ES 3.0.2] Section 2.3.1 page 14
  // Data Conversion For State-Setting Commands
  // Floating-point values are rounded to the nearest integer, instead of truncated, as done by static_cast.
  template <typename outT> outT iround(GLfloat value) { return static_cast<outT>(value > 0.0f ? floor(value + 0.5f) : ceil(value - 0.5f)); }
  template <typename outT> outT uiround(GLfloat value) { return static_cast<outT>(value + 0.5f); }
  
  // Helper for converting arbitrary GL types to other GL types used in queries and state setting
  template <typename ParamType>
  GLuint ConvertToGLuint(ParamType param)
  {
      return static_cast<GLuint>(param);
  }
  template <>
  GLuint ConvertToGLuint(GLfloat param);
  
  template <typename ParamType>
  GLint ConvertToGLint(ParamType param)
  {
      return static_cast<GLint>(param);
  }
  template <>
  GLint ConvertToGLint(GLfloat param);
  
  // Same conversion as uint
  template <typename ParamType>
  GLenum ConvertToGLenum(ParamType param)
  {
      return static_cast<GLenum>(ConvertToGLuint(param));
  }
  
  template <typename ParamType>
  GLfloat ConvertToGLfloat(ParamType param)
  {
      return static_cast<GLfloat>(param);
  }
  
  template <typename ParamType>
  ParamType ConvertFromGLfloat(GLfloat param)
  {
      return static_cast<ParamType>(param);
  }
  template <>
  GLint ConvertFromGLfloat(GLfloat param);
  template <>
  GLuint ConvertFromGLfloat(GLfloat param);
  
  template <typename ParamType>
  ParamType ConvertFromGLenum(GLenum param)
  {
      return static_cast<ParamType>(param);
  }
  
  template <typename ParamType>
  ParamType ConvertFromGLuint(GLuint param)
  {
      return static_cast<ParamType>(param);
  }
  
  template <typename ParamType>
  ParamType ConvertFromGLint(GLint param)
  {
      return static_cast<ParamType>(param);
  }
  
  template <typename ParamType>
  ParamType ConvertFromGLboolean(GLboolean param)
  {
      return static_cast<ParamType>(param ? GL_TRUE : GL_FALSE);
  }
  
  template <typename ParamType>
  ParamType ConvertFromGLint64(GLint64 param)
  {
      return clampCast<ParamType>(param);
  }
  
  unsigned int ParseAndStripArrayIndex(std::string *name);
  
  }  // namespace gl
  
  namespace egl
  {
  static const EGLenum FirstCubeMapTextureTarget = EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR;
  static const EGLenum LastCubeMapTextureTarget = EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR;
  bool IsCubeMapTextureTarget(EGLenum target);
  size_t CubeMapTextureTargetToLayerIndex(EGLenum target);
  EGLenum LayerIndexToCubeMapTextureTarget(size_t index);
  bool IsTextureTarget(EGLenum target);
  bool IsRenderbufferTarget(EGLenum target);
  }
  
  namespace egl_gl
  {
  GLenum EGLCubeMapTargetToGLCubeMapTarget(EGLenum eglTarget);
  GLenum EGLImageTargetToGLTextureTarget(EGLenum eglTarget);
  GLuint EGLClientBufferToGLObjectHandle(EGLClientBuffer buffer);
  }
  
  #if !defined(ANGLE_ENABLE_WINDOWS_STORE)
  std::string getTempPath();
  void writeFile(const char* path, const void* data, size_t size);
  #endif
  
  #if defined (ANGLE_PLATFORM_WINDOWS)
  void ScheduleYield();
  #endif
  
  #endif  // COMMON_UTILITIES_H_
  

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