root/content/browser/renderer_host/compositing_iosurface_layer_mac.h

// Copyright 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_LAYER_MAC_H_
#define CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_LAYER_MAC_H_

#import <Cocoa/Cocoa.h>

#include "base/mac/scoped_cftyperef.h"
#include "base/memory/ref_counted.h"

namespace content {
class CompositingIOSurfaceContext;
class RenderWidgetHostViewMac;
}

// The CoreAnimation layer for drawing accelerated content.
@interface CompositingIOSurfaceLayer : CAOpenGLLayer {
 @private
  content::RenderWidgetHostViewMac* renderWidgetHostView_;
  scoped_refptr<content::CompositingIOSurfaceContext> context_;

  // Used to track when canDrawInCGLContext should return YES. This can be
  // in response to receiving a new compositor frame, or from any of the events
  // that cause setNeedsDisplay to be called on the layer.
  BOOL needsDisplay_;
}

- (id)initWithRenderWidgetHostViewMac:(content::RenderWidgetHostViewMac*)r;

// Remove this layer from the layer heirarchy, and mark that
// |renderWidgetHostView_| is no longer valid and may no longer be dereferenced.
- (void)disableCompositing;

// Called when a new frame is received.
- (void)gotNewFrame;

// Called when it has been a while since a new frame has been received, and the
// layer should become not-asynchronous.
- (void)timerSinceGotNewFrameFired;

@end

#endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_LAYER_MAC_H_