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 UI_GL_GL_SHARE_GROUP_H_ 6 #define UI_GL_GL_SHARE_GROUP_H_ 7 8 #include <set> 9 10 #include "base/basictypes.h" 11 #include "base/memory/ref_counted.h" 12 #include "ui/gl/gl_export.h" 13 14 namespace gfx { 15 16 class GLContext; 17 18 // A group of GL contexts that share an ID namespace. 19 class GL_EXPORT GLShareGroup : public base::RefCounted<GLShareGroup> { 20 public: 21 GLShareGroup(); 22 23 // These two should only be called from the constructor and destructor of 24 // GLContext. 25 void AddContext(GLContext* context); 26 void RemoveContext(GLContext* context); 27 28 // Returns a handle to any initialized context in the share group or NULL if 29 // there are no initialized contexts in the share group. 30 void* GetHandle(); 31 32 // Returns a pointer to any initialized context in the share group 33 // or NULL if there are no initialized contexts in the share group. 34 GLContext* GetContext(); 35 36 // Sets and returns the unique shared GL context. Used for context 37 // virtualization. 38 void SetSharedContext(GLContext* context); 39 GLContext* GetSharedContext(); 40 41 #if defined(OS_MACOSX) 42 // Sets and returns the ID of the renderer that all contexts in this share 43 // group should be on. 44 void SetRendererID(int renderer_id); 45 int GetRendererID(); 46 #endif 47 48 private: 49 friend class base::RefCounted<GLShareGroup>; 50 51 ~GLShareGroup(); 52 53 // References to GLContext are by raw pointer to avoid a reference count 54 // cycle. 55 typedef std::set<GLContext*> ContextSet; 56 ContextSet contexts_; 57 58 GLContext* shared_context_; 59 60 #if defined(OS_MACOSX) 61 int renderer_id_; 62 #endif 63 64 DISALLOW_COPY_AND_ASSIGN(GLShareGroup); 65 }; 66 67 } // namespace gfx 68 69 #endif // UI_GL_GL_SHARE_GROUP_H_ 70
