gpu/command_buffer/service/path_manager.h

   1 // Copyright (c) 2015 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_PATH_MANAGER_H_
   6 #define GPU_COMMAND_BUFFER_SERVICE_PATH_MANAGER_H_
   7
   8 #include <map>
   9
  10 #include "base/basictypes.h"
  11 #include "gpu/command_buffer/service/gl_utils.h"
  12 #include "gpu/gpu_export.h"
  13
  14 namespace gpu {
  15 namespace gles2 {
  16
  17 // This class keeps track of paths and their client and service ids
  18 // so we can correctly clear them.
  19 class GPU_EXPORT PathManager {
  20  public:
  21   PathManager();
  22   ~PathManager();
  23
  24   // Must call before destruction.
  25   void Destroy(bool have_context);
  26
  27   // Creates a path mapping between closed intervals
  28   // [first_client_id, last_client_id] -> [first_service_id, ...].
  29   void CreatePathRange(GLuint first_client_id,
  30                        GLuint last_client_id,
  31                        GLuint first_service_id);
  32
  33   // Returns true if any path exists in the closed interval
  34   // [first_client_id, last_client_id].
  35   bool HasPathsInRange(GLuint first_client_id, GLuint last_client_id) const;
  36
  37   // Gets the path id corresponding the client path id.
  38   // Returns false if no such service path id was not found.
  39   bool GetPath(GLuint client_id, GLuint* service_id) const;
  40
  41   // Removes a closed interval of paths [first_client_id, last_client_id].
  42   void RemovePaths(GLuint first_client_id, GLuint last_client_id);
  43
  44   // Mapping between client id and service id.
  45   // Should be used only by the implementation.
  46   struct PathRangeDescription {
  47     PathRangeDescription(GLuint last_client, GLuint first_service)
  48         : last_client_id(last_client), first_service_id(first_service) {}
  49     GLuint last_client_id;
  50     GLuint first_service_id;
  51     typedef GLuint ServiceIdType;
  52   };
  53   typedef std::map<GLuint, PathRangeDescription> PathRangeMap;
  54
  55  private:
  56   // Checks for consistency inside the book-keeping structures. Used as
  57   // DCHECK pre/post condition in mutating functions.
  58   bool CheckConsistency();
  59
  60   PathRangeMap path_map_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(PathManager);
  63 };
  64
  65 }  // namespace gles2
  66 }  // namespace gpu
  67
  68 #endif  // GPU_COMMAND_BUFFER_SERVICE_PATH_MANAGER_H_