// 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 #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 iosurface_; scoped_refptr 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 helper_; scoped_ptr> 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) 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withClient:(content::CompositingIOSurfaceLayerClient*)client; // Mark that the client is no longer valid and cannot be called back into.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_