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