gpu/command_buffer/service/id_manager.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef GPU_COMMAND_BUFFER_SERVICE_ID_MANAGER_H_
   6 #define GPU_COMMAND_BUFFER_SERVICE_ID_MANAGER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/containers/hash_tables.h"
  10 #include "gpu/command_buffer/service/gl_utils.h"
  11 #include "gpu/gpu_export.h"
  12
  13 namespace gpu {
  14 namespace gles2 {
  15
  16 // This class maps one set of ids to another.
  17 //
  18 // NOTE: To support shared resources an instance of this class will
  19 // need to be shared by multiple GLES2Decoders.
  20 class GPU_EXPORT IdManager {
  21  public:
  22   IdManager();
  23   ~IdManager();
  24
  25   // Maps a client_id to a service_id. Return false if the client_id or
  26   // service_id are already mapped to something else.
  27   bool AddMapping(GLuint client_id, GLuint service_id);
  28
  29   // Unmaps a pair of ids. Returns false if the pair were not previously mapped.
  30   bool RemoveMapping(GLuint client_id, GLuint service_id);
  31
  32   // Gets the corresponding service_id for the given client_id.
  33   // Returns false if there is no corresponding service_id.
  34   bool GetServiceId(GLuint client_id, GLuint* service_id);
  35
  36   // Gets the corresponding client_id for the given service_id.
  37   // Returns false if there is no corresponding client_id.
  38   bool GetClientId(GLuint service_id, GLuint* client_id);
  39
  40  private:
  41   typedef base::hash_map<GLuint, GLuint> MapType;
  42   MapType id_map_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(IdManager);
  45 };
  46
  47 }  // namespace gles2
  48 }  // namespace gpu
  49
  50 #endif  // GPU_COMMAND_BUFFER_SERVICE_ID_MANAGER_H_
  51