Virtual GL

ui/gl/gl_context.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GL_GL_CONTEXT_H_
 #define UI_GL_GL_CONTEXT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gpu_preference.h"
 
 namespace gfx {
 
 class GLSurface;
+class VirtualGLApi;
+class GLStateRestorer;
 
 // Encapsulates an OpenGL context, hiding platform specific management.
 class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
  public:
   explicit GLContext(GLShareGroup* share_group);
 
   // Initializes the GL context to be compatible with the given surface. The GL
   // context can be made with other surface's of the same type. The compatible
   // surface is only needed for certain platforms like WGL, OSMesa and GLX. It
   // should be specific for all platforms though.
   virtual bool Initialize(
       GLSurface* compatible_surface, GpuPreference gpu_preference) = 0;
 
   // Destroys the GL context.
   virtual void Destroy() = 0;
 
   // Makes the GL context and a surface current on the current thread.
   virtual bool MakeCurrent(GLSurface* surface) = 0;
 
   // Releases this GL context and surface as current on the current thread.
   virtual void ReleaseCurrent(GLSurface* surface) = 0;
 
   // Returns true if this context and surface is current. Pass a null surface
   // if the current surface is not important.
   virtual bool IsCurrent(GLSurface* surface) = 0;
 
   // Get the underlying platform specific GL context "handle".
   virtual void* GetHandle() = 0;
 
+  // Gets the GLStateRestore for the context.
+  virtual GLStateRestorer* GetGLStateRestorer();
+
   // Set swap interval. This context must be current.
   virtual void SetSwapInterval(int interval) = 0;
 
   // Returns space separated list of extensions. The context must be current.
   virtual std::string GetExtensions();
 
   // Returns in bytes the total amount of GPU memory for the GPU which this
   // context is currently rendering on. Returns false if no extension exists
   // to get the exact amount of GPU memory.
   virtual bool GetTotalGpuMemory(size_t* bytes);
@@ skipping 11 matching lines @@
       GLShareGroup* share_group,
       GLSurface* compatible_surface,
       GpuPreference gpu_preference);
 
   static bool LosesAllContextsOnContextLost();
 
   static GLContext* GetCurrent();
 
   virtual bool WasAllocatedUsingRobustnessExtension();
 
+  // Use this context for virtualization.
+  void SetupForVirtualization();
+
+  // Make this context current when used for context virtualization.
+  bool MakeVirtuallyCurrent(GLContext* virutal_context, GLSurface* surface);
+
  protected:
   virtual ~GLContext();
+
+  // Sets the GL api to the real hardware API (vs the VirtualAPI)
+  static void SetRealGLApi();
   static void SetCurrent(GLContext* context, GLSurface* surface);
 
   // Initialize function pointers to extension functions in the GL
   // implementation. Should be called immediately after this context is made
   // current.
   bool InitializeExtensionBindings();
 
  private:
   friend class base::RefCounted<GLContext>;
 
   scoped_refptr<GLShareGroup> share_group_;
+  scoped_ptr<VirtualGLApi> virtual_gl_api_;
 
   DISALLOW_COPY_AND_ASSIGN(GLContext);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_CONTEXT_H_