ui/accelerated_widget_mac/io_surface_context.h

   1 // Copyright (c) 2013 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_ACCELERATED_WIDGET_MAC_IO_SURFACE_CONTEXT_H_
   6 #define UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_CONTEXT_H_
   7
   8 #include <OpenGL/OpenGL.h>
   9 #include <map>
  10
  11 #include "base/basictypes.h"
  12 #include "base/lazy_instance.h"
  13 #include "base/mac/scoped_nsobject.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
  17 #include "ui/gl/gpu_switching_observer.h"
  18 #include "ui/gl/scoped_cgl.h"
  19
  20 namespace ui {
  21
  22 class IOSurfaceContext
  23     : public base::RefCounted<IOSurfaceContext>,
  24       public ui::GpuSwitchingObserver {
  25  public:
  26   enum Type {
  27     // The number used to look up the context used for async readback and for
  28     // initializing the IOSurface.
  29     kOffscreenContext = -2,
  30     // The number used to look up the context used by CAOpenGLLayers.
  31     kCALayerContext = -3,
  32   };
  33
  34   // Get or create a GL context of the specified type. Share these GL contexts
  35   // as much as possible because creating and destroying them can be expensive.
  36   // http://crbug.com/180463
  37   ACCELERATED_WIDGET_MAC_EXPORT static scoped_refptr<IOSurfaceContext> Get(
  38       Type type);
  39
  40   // Mark that all the GL contexts in the same sharegroup as this context as
  41   // invalid, so they shouldn't be returned anymore by Get, but rather, new
  42   // contexts should be created. This is called as a precaution when unexpected
  43   // GL errors occur, or after a GPU switch.
  44   void PoisonContextAndSharegroup();
  45   bool HasBeenPoisoned() const { return poisoned_; }
  46
  47   CGLContextObj cgl_context() const { return cgl_context_; }
  48
  49   // ui::GpuSwitchingObserver implementation.
  50   void OnGpuSwitched() override;
  51
  52  private:
  53   friend class base::RefCounted<IOSurfaceContext>;
  54
  55   IOSurfaceContext(
  56       Type type,
  57       base::ScopedTypeRef<CGLContextObj> clg_context_strong);
  58   virtual ~IOSurfaceContext();
  59
  60   Type type_;
  61   base::ScopedTypeRef<CGLContextObj> cgl_context_;
  62
  63   bool poisoned_;
  64
  65   // The global map from window number and window ordering to
  66   // context data.
  67   typedef std::map<Type, IOSurfaceContext*> TypeMap;
  68   static base::LazyInstance<TypeMap> type_map_;
  69   static TypeMap* type_map();
  70 };
  71
  72 }  // namespace ui
  73
  74 #endif  // UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_CONTEXT_H_