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// 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 UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_CONTEXT_H_
#define UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_CONTEXT_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 "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
#include "ui/gl/gpu_switching_observer.h"
#include "ui/gl/scoped_cgl.h"
namespace ui {
class IOSurfaceContext
: public base::RefCounted<IOSurfaceContext>,
public ui::GpuSwitchingObserver {
public:
enum Type {
// The number used to look up the context used for async readback and for
// initializing the IOSurface.
kOffscreenContext = -2,
// The number used to look up the context used by CAOpenGLLayers.
kCALayerContext = -3,
};
// Get or create a GL context of the specified type. Share these GL contexts
// as much as possible because creating and destroying them can be expensive.
// http://crbug.com/180463
ACCELERATED_WIDGET_MAC_EXPORT static scoped_refptr<IOSurfaceContext> Get(
Type type);
// Mark that all the GL contexts in the same sharegroup as this context as
// invalid, so they shouldn't be returned anymore by Get, but rather, new
// contexts should be created. This is called as a precaution when unexpected
// GL errors occur, or after a GPU switch.
void PoisonContextAndSharegroup();
bool HasBeenPoisoned() const { return poisoned_; }
CGLContextObj cgl_context() const { return cgl_context_; }
// ui::GpuSwitchingObserver implementation.
void OnGpuSwitched() override;
private:
friend class base::RefCounted<IOSurfaceContext>;
IOSurfaceContext(
Type type,
base::ScopedTypeRef<CGLContextObj> clg_context_strong);
virtual ~IOSurfaceContext();
Type type_;
base::ScopedTypeRef<CGLContextObj> cgl_context_;
bool poisoned_;
// The global map from window number and window ordering to
// context data.
typedef std::map<Type, IOSurfaceContext*> TypeMap;
static base::LazyInstance<TypeMap> type_map_;
static TypeMap* type_map();
};
} // namespace ui
#endif // UI_ACCELERATED_WIDGET_MAC_IO_SURFACE_CONTEXT_H_
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