MacViews: Move content::AcceleratedWidget to new component, ui/accelerated_widget_mac

content/browser/compositor/browser_compositor_ca_layer_tree_mac.h

-// Copyright 2014 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_COMPOSITOR_ACCELERATED_WIDGET_HELPER_MAC_H_
-#define CONTENT_BROWSER_COMPOSITOR_ACCELERATED_WIDGET_HELPER_MAC_H_
-
-#include <IOSurface/IOSurfaceAPI.h>
-#include <vector>
-
-#include "skia/ext/platform_canvas.h"
-#include "ui/events/latency_info.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gfx/native_widget_types.h"
-
-#if defined(__OBJC__)
-#import <Cocoa/Cocoa.h>
-#import "base/mac/scoped_nsobject.h"
-#import "content/browser/compositor/io_surface_layer_mac.h"
-#include "ui/base/cocoa/remote_layer_api.h"
-#import "ui/base/cocoa/software_layer.h"
-#endif  // __OBJC__
-
-namespace cc {
-class SoftwareFrameData;
-}
-
-namespace content {
-
-class AcceleratedWidgetMac;
-
-// A class through which an AcceleratedWidget may be bound to draw the contents
-// of an NSView. An AcceleratedWidget may be bound to multiple different views
-// throughout its lifetime (one at a time, though).
-class AcceleratedWidgetMacNSView {
- public:
-  virtual NSView* AcceleratedWidgetGetNSView() const = 0;
-  virtual bool AcceleratedWidgetShouldIgnoreBackpressure() const = 0;
-  virtual void AcceleratedWidgetSwapCompleted(
-      const std::vector<ui::LatencyInfo>& latency_info) = 0;
-  virtual void AcceleratedWidgetHitError() = 0;
-};
-
-#if defined(__OBJC__)
-
-// AcceleratedWidgetMac owns a tree of CALayers. The widget may be passed
-// to a ui::Compositor, which will cause, through its output surface, calls to
-// GotAcceleratedFrame and GotSoftwareFrame. The CALayers may be installed
-// in an NSView by setting the AcceleratedWidgetMacNSView for the helper.
-class AcceleratedWidgetMac : public IOSurfaceLayerClient {
- public:
-  AcceleratedWidgetMac();
-  virtual ~AcceleratedWidgetMac();
-
-  gfx::AcceleratedWidget accelerated_widget() { return native_widget_; }
-
-  void SetNSView(AcceleratedWidgetMacNSView* view);
-  void ResetNSView();
-
-  // Return true if the last frame swapped has a size in DIP of |dip_size|.
-  bool HasFrameOfSize(const gfx::Size& dip_size) const;
-
-  // Return the CGL renderer ID for the surface, if one is available.
-  int GetRendererID() const;
-
-  // Return true if the renderer should not be throttled by GPU back-pressure.
-  bool IsRendererThrottlingDisabled() const;
-
-  // Mark a bracket in which new frames are being pumped in a restricted nested
-  // run loop.
-  void BeginPumpingFrames();
-  void EndPumpingFrames();
-
-  void GotAcceleratedFrame(
-      uint64 surface_handle,
-      const std::vector<ui::LatencyInfo>& latency_info,
-      gfx::Size pixel_size,
-      float scale_factor,
-      const base::Closure& drawn_callback);
-
-  void GotSoftwareFrame(
-      cc::SoftwareFrameData* frame_data, float scale_factor, SkCanvas* canvas);
-
-private:
-  // IOSurfaceLayerClient implementation:
-  bool IOSurfaceLayerShouldAckImmediately() const override;
-  void IOSurfaceLayerDidDrawFrame() override;
-  void IOSurfaceLayerHitError() override;
-
-  void GotAcceleratedCAContextFrame(
-      CAContextID ca_context_id, gfx::Size pixel_size, float scale_factor);
-
-  void GotAcceleratedIOSurfaceFrame(
-      IOSurfaceID io_surface_id, gfx::Size pixel_size, float scale_factor);
-
-  void AcknowledgeAcceleratedFrame();
-
-  // Remove a layer from the heirarchy and destroy it. Because the accelerated
-  // layer types may be replaced by a layer of the same type, the layer to
-  // destroy is parameterized, and, if it is the current layer, the current
-  // layer is reset.
-  void DestroyCAContextLayer(
-      base::scoped_nsobject<CALayerHost> ca_context_layer);
-  void DestroyIOSurfaceLayer(
-      base::scoped_nsobject<IOSurfaceLayer> io_surface_layer);
-  void DestroySoftwareLayer();
-
-  // The AcceleratedWidgetMacNSView that is using this as its internals.
-  AcceleratedWidgetMacNSView* view_;
-
-  // A phony NSView handle used to identify this.
-  gfx::AcceleratedWidget native_widget_;
-
-  // A flipped layer, which acts as the parent of the compositing and software
-  // layers. This layer is flipped so that the we don't need to recompute the
-  // origin for sub-layers when their position changes (this is impossible when
-  // using remote layers, as their size change cannot be synchronized with the
-  // window). This indirection is needed because flipping hosted layers (like
-  // |background_layer_| of RenderWidgetHostViewCocoa) leads to unpredictable
-  // behavior.
-  base::scoped_nsobject<CALayer> flipped_layer_;
-
-  // The accelerated CoreAnimation layer hosted by the GPU process.
-  base::scoped_nsobject<CALayerHost> ca_context_layer_;
-
-  // The locally drawn accelerated CoreAnimation layer.
-  base::scoped_nsobject<IOSurfaceLayer> io_surface_layer_;
-
-  // The locally drawn software layer.
-  base::scoped_nsobject<SoftwareLayer> software_layer_;
-
-  // If an accelerated frame has come in which has not yet been drawn and acked
-  // then this is the latency info and the callback to make when the frame is
-  // drawn. If there is no such frame then the callback is null.
-  std::vector<ui::LatencyInfo> accelerated_latency_info_;
-  base::Closure accelerated_frame_drawn_callback_;
-
-  // The size in DIP of the last swap received from |compositor_|.
-  gfx::Size last_swap_size_dip_;
-
-  DISALLOW_COPY_AND_ASSIGN(AcceleratedWidgetMac);
-};
-
-#endif  // __OBJC__
-
-void AcceleratedWidgetMacGotAcceleratedFrame(
-    gfx::AcceleratedWidget widget, uint64 surface_handle,
-    const std::vector<ui::LatencyInfo>& latency_info,
-    gfx::Size pixel_size, float scale_factor,
-    const base::Closure& drawn_callback,
-    bool* disable_throttling, int* renderer_id);
-
-void AcceleratedWidgetMacGotSoftwareFrame(
-    gfx::AcceleratedWidget widget,
-    cc::SoftwareFrameData* frame_data, float scale_factor, SkCanvas* canvas);
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_COMPOSITOR_ACCELERATED_WIDGET_HELPER_MAC_H_