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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 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 {
class CompositingIOSurfaceShaderPrograms;
class 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
// surface ordering. Share these GL contexts as much as possible because
// creating and destroying them can be expensive
// http://crbug.com/180463
static scoped_refptr<CompositingIOSurfaceContext> Get(int window_number);
// 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.
void PoisonContextAndSharegroup();
bool HasBeenPoisoned() const { return poisoned_; }
CompositingIOSurfaceShaderPrograms* shader_program_cache() const {
return shader_program_cache_.get();
}
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,
base::ScopedTypeRef<CGLContextObj> clg_context_strong,
CGLContextObj clg_context,
bool is_vsync_disabled_,
scoped_ptr<CompositingIOSurfaceShaderPrograms> shader_program_cache);
virtual ~CompositingIOSurfaceContext();
int window_number_;
base::ScopedTypeRef<CGLContextObj> cgl_context_strong_;
// Weak, backed by |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_
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