Android: Use virtualized context only for those with compatible config

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 <vector>
 
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/cancellation_flag.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gl_state_restorer.h"
+#include "ui/gl/gl_surface.h"
 #include "ui/gl/gpu_preference.h"
 
 namespace gpu {
 class GLContextVirtual;
 }  // namespace gpu
 
 namespace gfx {
 
 class GLSurface;
 class GPUTiming;
@@ skipping 39 matching lines @@
   // Set swap interval. This context must be current.
   void SetSwapInterval(int interval);
 
   // Forces the swap interval to zero (no vsync) regardless of any future values
   // passed to SetSwapInterval.
   void ForceSwapIntervalZero(bool force);
 
   // Returns space separated list of extensions. The context must be current.
   virtual std::string GetExtensions();
 
-  // Indicate that it is safe to force this context to switch GPUs, since
+  // Indicates that it is safe to force this context to switch GPUs, since
   // transitioning can cause corruption and hangs (OS X only).
   virtual void SetSafeToForceGpuSwitch();
 
-  // Attempt to force the context to move to the GPU of its sharegroup. Return
+  // Attempts to force the context to move to the GPU of its sharegroup. Return
   // false only in the event of an unexpected error on the context.
   virtual bool ForceGpuSwitchIfNeeded();
 
-  // Indicate that the real context switches should unbind the FBO first
+  // Indicates that the real context switches should unbind the FBO first
   // (For an Android work-around only).
   virtual void SetUnbindFboOnMakeCurrent();
 
+  // Updates the shared context to a matched configuration.
+  virtual void UpdateSharedContext(GLContext* context);
+
   // Returns whether the current context supports the named extension. The
   // context must be current.
   bool HasExtension(const char* name);
 
   // Returns version info of the underlying GL context. The context must be
   // current.
   const GLVersionInfo* GetVersionInfo();
 
   GLShareGroup* share_group();
 
@@ skipping 29 matching lines @@
   virtual std::string GetGLRenderer();
 
   // Return a callback that, when called, indicates that the state the
   // underlying context has been changed by code outside of the command buffer,
   // and will need to be restored.
   virtual base::Closure GetStateWasDirtiedExternallyCallback();
 
   // Restore the context's state if it was dirtied by an external caller.
   virtual void RestoreStateIfDirtiedExternally();
 
+  GLSurface::Format GetFormat() { return format_; }
+
  protected:
   virtual ~GLContext();
 
   // Will release the current context when going out of scope, unless canceled.
   class ScopedReleaseCurrent {
    public:
     ScopedReleaseCurrent();
     ~ScopedReleaseCurrent();
 
     void Cancel();
@@ skipping 12 matching lines @@
   bool InitializeDynamicBindings();
 
   // Returns the last real (non-virtual) GLContext made current.
   static GLContext* GetRealCurrent();
 
   virtual void OnSetSwapInterval(int interval) = 0;
 
   bool GetStateWasDirtiedExternally() const;
   void SetStateWasDirtiedExternally(bool dirtied_externally);
 
- private:
+  GLSurface::Format format_;
+
+private:
   friend class base::RefCounted<GLContext>;
 
   // For GetRealCurrent.
   friend class VirtualGLApi;
   friend class gpu::GLContextVirtual;
 
   scoped_refptr<GLShareGroup> share_group_;
   scoped_ptr<VirtualGLApi> virtual_gl_api_;
   bool state_dirtied_externally_;
   scoped_ptr<GLStateRestorer> state_restorer_;
@@ skipping 18 matching lines @@
   void SetCurrent(GLSurface* surface) override;
 
  private:
   scoped_ptr<gfx::GPUTiming> gpu_timing_;
   DISALLOW_COPY_AND_ASSIGN(GLContextReal);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_CONTEXT_H_