Mac: Recreate browser-side GL contexts on GPU switch

content/browser/renderer_host/compositing_iosurface_context_mac.h

 // Copyright (c) 2013 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 CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_CONTEXT_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_CONTEXT_MAC_H_
 
 #import <AppKit/NSOpenGL.h>
 #include <OpenGL/OpenGL.h>
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "content/public/browser/gpu_data_manager_observer.h"
 #include "ui/gl/scoped_cgl.h"
 
 namespace content {
 
 enum CoreAnimationStatus {
   CORE_ANIMATION_DISABLED,
   CORE_ANIMATION_ENABLED,
 };
 CoreAnimationStatus GetCoreAnimationStatus();
 
 class CompositingIOSurfaceShaderPrograms;
 
 class CompositingIOSurfaceContext
-    : public base::RefCounted<CompositingIOSurfaceContext> {
+    : public base::RefCounted<CompositingIOSurfaceContext>,
+      public content::GpuDataManagerObserver {
  public:
   enum {
     // The number used to look up the context used for async readback and for
     // initializing the IOSurface.
     kOffscreenContextWindowNumber = -2,
     // The number used to look up the context used by CAOpenGLLayers.
     kCALayerContextWindowNumber = -3,
   };
 
   // Get or create a GL context for the specified window with the specified
@@ skipping 10 matching lines @@
   bool HasBeenPoisoned() const { return poisoned_; }
 
   CompositingIOSurfaceShaderPrograms* shader_program_cache() const {
     return shader_program_cache_.get();
   }
   NSOpenGLContext* nsgl_context() const;
   CGLContextObj cgl_context() const { return cgl_context_; }
   bool is_vsync_disabled() const { return is_vsync_disabled_; }
   int window_number() const { return window_number_; }
 
+  // content::GpuDataManagerObserver implementation.
+  virtual void OnGpuSwitching() OVERRIDE;
+
  private:
   friend class base::RefCounted<CompositingIOSurfaceContext>;
 
   CompositingIOSurfaceContext(
       int window_number,
       NSOpenGLContext* nsgl_context,
       base::ScopedTypeRef<CGLContextObj> clg_context_strong,
       CGLContextObj clg_context,
       bool is_vsync_disabled_,
       scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache);
-  ~CompositingIOSurfaceContext();
+  virtual ~CompositingIOSurfaceContext();
 
   int window_number_;
   base::scoped_nsobject<NSOpenGLContext> nsgl_context_;
   base::ScopedTypeRef<CGLContextObj> cgl_context_strong_;
   // Weak, backed by |nsgl_context_| or |cgl_context_strong_|.
   CGLContextObj cgl_context_;
 
   bool is_vsync_disabled_;
   scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache_;
   bool poisoned_;
 
   // The global map from window number and window ordering to
   // context data.
   typedef std::map<int, CompositingIOSurfaceContext*> WindowMap;
   static base::LazyInstance<WindowMap> window_map_;
   static WindowMap* window_map();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_CONTEXT_MAC_H_