kc3-lang/angle/src/libGLESv2/entry_points_utils.h

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• Author : Jamie Madill
  Date : 2018-10-25 17:03:48
  Hash : 77abad8d
  Message : Remove Context::gatherParams. This won't be used in the future. It saves a few instructions on each entry point. Also refactors a bit of touched code. Also adds in a missed entry point: "glTexStorage2DMultisampleANGLE". Removes related code and moves remaining helper code in params.h into a new file entry_point_utils.h. In total this patch series reduces overhead by up to 5%. Bug: angleproject:2933 Change-Id: Ifb49564597cde6ba82dfc3e185227619fdc62612 Reviewed-on: https://chromium-review.googlesource.com/c/1299478 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

• src/libGLESv2/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 GLES entry point routines.
  
  #ifndef LIBGLESV2_ENTRY_POINT_UTILS_H_
  #define LIBGLESV2_ENTRY_POINT_UTILS_H_
  
  #include "angle_gl.h"
  #include "common/Optional.h"
  #include "common/PackedEnums.h"
  #include "common/angleutils.h"
  #include "common/mathutil.h"
  #include "libGLESv2/entry_points_enum_autogen.h"
  
  namespace gl
  {
  // A template struct for determining the default value to return for each entry point.
  template <EntryPoint EP, typename ReturnType>
  struct DefaultReturnValue;
  
  // Default return values for each basic return type.
  template <EntryPoint EP>
  struct DefaultReturnValue<EP, GLint>
  {
      static constexpr GLint kValue = -1;
  };
  
  // This doubles as the GLenum return value.
  template <EntryPoint EP>
  struct DefaultReturnValue<EP, GLuint>
  {
      static constexpr GLuint kValue = 0;
  };
  
  template <EntryPoint EP>
  struct DefaultReturnValue<EP, GLboolean>
  {
      static constexpr GLboolean kValue = GL_FALSE;
  };
  
  // Catch-all rules for pointer types.
  template <EntryPoint EP, typename PointerType>
  struct DefaultReturnValue<EP, const PointerType *>
  {
      static constexpr const PointerType *kValue = nullptr;
  };
  
  template <EntryPoint EP, typename PointerType>
  struct DefaultReturnValue<EP, PointerType *>
  {
      static constexpr PointerType *kValue = nullptr;
  };
  
  // Overloaded to return invalid index
  template <>
  struct DefaultReturnValue<EntryPoint::GetUniformBlockIndex, GLuint>
  {
      static constexpr GLuint kValue = GL_INVALID_INDEX;
  };
  
  // Specialized enum error value.
  template <>
  struct DefaultReturnValue<EntryPoint::ClientWaitSync, GLenum>
  {
      static constexpr GLenum kValue = GL_WAIT_FAILED;
  };
  
  // glTestFenceNV should still return TRUE for an invalid fence.
  template <>
  struct DefaultReturnValue<EntryPoint::TestFenceNV, GLboolean>
  {
      static constexpr GLboolean kValue = GL_TRUE;
  };
  
  template <EntryPoint EP, typename ReturnType>
  constexpr ANGLE_INLINE ReturnType GetDefaultReturnValue()
  {
      return DefaultReturnValue<EP, ReturnType>::kValue;
  }
  }  // namespace gl
  
  #endif  // LIBGLESV2_ENTRY_POINT_UTILS_H_