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

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• Hash : 9528641b
  Author :
  Date : 2020-11-23T15:47:09
  

  EGL: Generalize the entry point enum.
  
  This both generalizes the GL entry point enum to include other APIs
  like EGL and inserts the EGL and WGL entry points into the enum.
  
  This will faciliate EGL entry point auto-generation and also frame
  capture for EGL entry points.
  
  Bug: angleproject:2621
  Change-Id: Iaf4310e03b3d55839dd1328362fb29dcef918fab
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2555861
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  Reviewed-by: Tim Van Patten <timvp@google.com>
  

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• src/libANGLE/entry_points_utils.h

• //
  // Copyright 2018 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.
  //
  // entry_point_utils:
  //   These helpers are used in GL/GLES entry point routines.
  
  #ifndef LIBANGLE_ENTRY_POINT_UTILS_H_
  #define LIBANGLE_ENTRY_POINT_UTILS_H_
  
  #include "angle_gl.h"
  #include "common/Optional.h"
  #include "common/PackedEnums.h"
  #include "common/angleutils.h"
  #include "common/entry_points_enum_autogen.h"
  #include "common/mathutil.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/Display.h"
  
  namespace gl
  {
  // A template struct for determining the default value to return for each entry point.
  template <angle::EntryPoint EP, typename ReturnType>
  struct DefaultReturnValue;
  
  // Default return values for each basic return type.
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, GLint>
  {
      static constexpr GLint kValue = -1;
  };
  
  // This doubles as the GLenum return value.
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, GLuint>
  {
      static constexpr GLuint kValue = 0;
  };
  
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, GLboolean>
  {
      static constexpr GLboolean kValue = GL_FALSE;
  };
  
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, ShaderProgramID>
  {
      static constexpr ShaderProgramID kValue = {0};
  };
  
  // Catch-all rules for pointer types.
  template <angle::EntryPoint EP, typename PointerType>
  struct DefaultReturnValue<EP, const PointerType *>
  {
      static constexpr const PointerType *kValue = nullptr;
  };
  
  template <angle::EntryPoint EP, typename PointerType>
  struct DefaultReturnValue<EP, PointerType *>
  {
      static constexpr PointerType *kValue = nullptr;
  };
  
  // Overloaded to return invalid index
  template <>
  struct DefaultReturnValue<angle::EntryPoint::GLGetUniformBlockIndex, GLuint>
  {
      static constexpr GLuint kValue = GL_INVALID_INDEX;
  };
  
  // Specialized enum error value.
  template <>
  struct DefaultReturnValue<angle::EntryPoint::GLClientWaitSync, GLenum>
  {
      static constexpr GLenum kValue = GL_WAIT_FAILED;
  };
  
  // glTestFenceNV should still return TRUE for an invalid fence.
  template <>
  struct DefaultReturnValue<angle::EntryPoint::GLTestFenceNV, GLboolean>
  {
      static constexpr GLboolean kValue = GL_TRUE;
  };
  
  template <angle::EntryPoint EP, typename ReturnType>
  constexpr ANGLE_INLINE ReturnType GetDefaultReturnValue()
  {
      return DefaultReturnValue<EP, ReturnType>::kValue;
  }
  
  #if ANGLE_CAPTURE_ENABLED
  #    define ANGLE_CAPTURE(Func, ...) CaptureCallToFrameCapture(Capture##Func, __VA_ARGS__)
  #else
  #    define ANGLE_CAPTURE(...)
  #endif  // ANGLE_CAPTURE_ENABLED
  
  #define EGL_EVENT(EP, FMT, ...) EVENT(nullptr, EGL##EP, FMT, ##__VA_ARGS__)
  
  inline int CID(const Context *context)
  {
      return context == nullptr ? 0 : static_cast<int>(context->id().value);
  }
  }  // namespace gl
  
  namespace egl
  {
  inline int CID(EGLDisplay display, EGLContext context)
  {
      auto *displayPtr = reinterpret_cast<const egl::Display *>(display);
      if (!Display::isValidDisplay(displayPtr))
      {
          return -1;
      }
      auto *contextPtr = reinterpret_cast<const gl::Context *>(context);
      if (!displayPtr->isValidContext(contextPtr))
      {
          return -1;
      }
      return gl::CID(contextPtr);
  }
  }  // namespace egl
  
  #endif  // LIBANGLE_ENTRY_POINT_UTILS_H_
  

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