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// 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"
#include "base/timer/timer.h"
namespace content {
class CompositingIOSurfaceMac;
class CompositingIOSurfaceContext;
class CompositingIOSurfaceLayerHelper;
class CompositingIOSurfaceLayerClient {
public:
virtual void AcceleratedLayerDidDrawFrame(bool succeeded) = 0;
};
} // namespace content
// The CoreAnimation layer for drawing accelerated content.
@interface CompositingIOSurfaceLayer : CAOpenGLLayer {
@private
content::CompositingIOSurfaceLayerClient* client_;
scoped_refptr<content::CompositingIOSurfaceMac> iosurface_;
scoped_refptr<content::CompositingIOSurfaceContext> context_;
// The browser places back-pressure on the GPU by not acknowledging swap
// calls until they appear on the screen. This can lead to hangs if the
// view is moved offscreen (among other things). Prevent hangs by always
// acknowledging the frame after timeout of 1/6th of a second has passed.
scoped_ptr<content::CompositingIOSurfaceLayerHelper> helper_;
scoped_ptr<base::DelayTimer<content::CompositingIOSurfaceLayerHelper>> timer_;
// 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 needs_display_;
// This is set when a frame is received, and un-set when the frame is drawn.
BOOL has_pending_frame_;
// Incremented every time that this layer is asked to draw but does not have
// new content to draw.
uint64 did_not_draw_counter_;
}
- (content::CompositingIOSurfaceMac*)iosurface;
- (content::CompositingIOSurfaceContext*)context;
- (id)initWithIOSurface:(scoped_refptr<content::CompositingIOSurfaceMac>)
iosurface
withScaleFactor:(float)scale_factor
withClient:(content::CompositingIOSurfaceLayerClient*)client;
// Mark that the client is no longer valid and cannot be called back into.
- (void)resetClient;
// Called when a new frame is received.
- (void)gotNewFrame;
@end
#endif // CONTENT_BROWSER_RENDERER_HOST_COMPOSITING_IOSURFACE_LAYER_MAC_H_
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