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      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_VERTEX_ARRAY_MANAGER_H_
      6 #define GPU_COMMAND_BUFFER_SERVICE_VERTEX_ARRAY_MANAGER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/containers/hash_tables.h"
     10 #include "base/logging.h"
     11 #include "base/memory/ref_counted.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "gpu/command_buffer/service/gl_utils.h"
     14 #include "gpu/gpu_export.h"
     15 
     16 namespace gpu {
     17 namespace gles2 {
     18 
     19 class VertexAttribManager;
     20 
     21 // This class keeps track of the vertex arrays and their sizes so we can do
     22 // bounds checking.
     23 class GPU_EXPORT VertexArrayManager {
     24  public:
     25   VertexArrayManager();
     26   ~VertexArrayManager();
     27 
     28   // Must call before destruction.
     29   void Destroy(bool have_context);
     30 
     31   // Creates a VertexAttribManager and if client_visible,
     32   // maps it to the client_id.
     33   scoped_refptr<VertexAttribManager> CreateVertexAttribManager(
     34       GLuint client_id,
     35       GLuint service_id,
     36       uint32 num_vertex_attribs,
     37       bool client_visible);
     38 
     39   // Gets the vertex attrib manager for the given vertex array.
     40   VertexAttribManager* GetVertexAttribManager(GLuint client_id);
     41 
     42   // Removes the vertex attrib manager for the given vertex array.
     43   void RemoveVertexAttribManager(GLuint client_id);
     44 
     45   // Gets a client id for a given service id.
     46   bool GetClientId(GLuint service_id, GLuint* client_id) const;
     47 
     48  private:
     49   friend class VertexAttribManager;
     50 
     51   void StartTracking(VertexAttribManager* vertex_attrib_manager);
     52   void StopTracking(VertexAttribManager* vertex_attrib_manager);
     53 
     54   // Info for each vertex array in the system.
     55   typedef base::hash_map<GLuint, scoped_refptr<VertexAttribManager> >
     56       VertexAttribManagerMap;
     57   VertexAttribManagerMap vertex_attrib_managers_;
     58 
     59   // Counts the number of VertexArrayInfo allocated with 'this' as its manager.
     60   // Allows to check no VertexArrayInfo will outlive this.
     61   unsigned int vertex_attrib_manager_count_;
     62 
     63   bool have_context_;
     64 
     65   DISALLOW_COPY_AND_ASSIGN(VertexArrayManager);
     66 };
     67 
     68 }  // namespace gles2
     69 }  // namespace gpu
     70 
     71 #endif  // GPU_COMMAND_BUFFER_SERVICE_VERTEX_ARRAY_MANAGER_H_
     72