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

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• Hash : e45e53bd
  Author :
  Date : 2016-05-25T10:36:04
  

  Support CHROMIUM_path_rendering
  
  This is partial support for CHROMIUM_path_rendering
  and implements basic path management and non-instanced
  rendering.
  
  BUG=angleproject:1382
  
  Change-Id: I9c0e88183e0a915d522889323933439d25b45b5f
  Reviewed-on: https://chromium-review.googlesource.com/348630
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/HandleRangeAllocator.h

• //
  // Copyright (c) 2002-2016 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.
  //
  
  // HandleRangeAllocator.h: Defines the gl::HandleRangeAllocator class, which is used to
  // allocate contiguous ranges of GL path handles.
  
  #ifndef LIBANGLE_HANDLERANGEALLOCATOR_H_
  #define LIBANGLE_HANDLERANGEALLOCATOR_H_
  
  #include <map>
  
  #include "angle_gl.h"
  #include "common/angleutils.h"
  
  namespace gl
  {
  
  // Allocates contiguous ranges of path object handles.
  class HandleRangeAllocator final : angle::NonCopyable
  {
    public:
      static const GLuint kInvalidHandle;
  
      HandleRangeAllocator();
  
      // Allocates a new path handle.
      GLuint allocate();
  
      // Allocates a handle starting at or above the value of |wanted|.
      // Note: may wrap if it starts near limit.
      GLuint allocateAtOrAbove(GLuint wanted);
  
      // Allocates |range| amount of contiguous paths.
      // Returns the first id to |first_id| or |kInvalidHandle| if
      // allocation failed.
      GLuint allocateRange(GLuint range);
  
      // Marks an id as used. Returns false if handle was already used.
      bool markAsUsed(GLuint handle);
  
      // Release handle.
      void release(GLuint handle);
  
      // Release a |range| amount of contiguous handles, starting from |first|
      void releaseRange(GLuint first, GLuint range);
  
      // Checks whether or not a resource ID is in use.
      bool isUsed(GLuint handle) const;
  
    private:
      std::map<GLuint, GLuint> mUsed;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_HANDLERANGEALLOCATOR_H_

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