ui/accelerated_widget_mac/accelerated_widget_mac.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_
   6 #define UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_
   7
   8 #include <IOSurface/IOSurface.h>
   9 #include <vector>
  10
  11 #include "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
  12 #include "ui/events/latency_info.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/gfx/geometry/size.h"
  15 #include "ui/gfx/native_widget_types.h"
  16
  17 #if defined(__OBJC__)
  18 #import <Cocoa/Cocoa.h>
  19 #import "base/mac/scoped_nsobject.h"
  20 #import "ui/accelerated_widget_mac/io_surface_layer.h"
  21 #import "ui/accelerated_widget_mac/software_layer.h"
  22 #include "ui/base/cocoa/remote_layer_api.h"
  23 #endif  // __OBJC__
  24
  25 class SkCanvas;
  26
  27 namespace cc {
  28 class SoftwareFrameData;
  29 }
  30
  31 namespace ui {
  32
  33 class AcceleratedWidgetMac;
  34
  35 // A class through which an AcceleratedWidget may be bound to draw the contents
  36 // of an NSView. An AcceleratedWidget may be bound to multiple different views
  37 // throughout its lifetime (one at a time, though).
  38 class AcceleratedWidgetMacNSView {
  39  public:
  40   virtual NSView* AcceleratedWidgetGetNSView() const = 0;
  41   virtual bool AcceleratedWidgetShouldIgnoreBackpressure() const = 0;
  42   virtual void AcceleratedWidgetSwapCompleted(
  43       const std::vector<ui::LatencyInfo>& latency_info) = 0;
  44   virtual void AcceleratedWidgetHitError() = 0;
  45 };
  46
  47 #if defined(__OBJC__)
  48
  49 // AcceleratedWidgetMac owns a tree of CALayers. The widget may be passed
  50 // to a ui::Compositor, which will cause, through its output surface, calls to
  51 // GotAcceleratedFrame and GotSoftwareFrame. The CALayers may be installed
  52 // in an NSView by setting the AcceleratedWidgetMacNSView for the helper.
  53 class ACCELERATED_WIDGET_MAC_EXPORT AcceleratedWidgetMac
  54     : public IOSurfaceLayerClient {
  55  public:
  56   explicit AcceleratedWidgetMac(bool needs_gl_finish_workaround);
  57   virtual ~AcceleratedWidgetMac();
  58
  59   gfx::AcceleratedWidget accelerated_widget() { return native_widget_; }
  60
  61   void SetNSView(AcceleratedWidgetMacNSView* view);
  62   void ResetNSView();
  63
  64   // Return true if the last frame swapped has a size in DIP of |dip_size|.
  65   bool HasFrameOfSize(const gfx::Size& dip_size) const;
  66
  67   // Return the CGL renderer ID for the surface, if one is available.
  68   int GetRendererID() const;
  69
  70   // Return true if the renderer should not be throttled by GPU back-pressure.
  71   bool IsRendererThrottlingDisabled() const;
  72
  73   // Mark a bracket in which new frames are being pumped in a restricted nested
  74   // run loop.
  75   void BeginPumpingFrames();
  76   void EndPumpingFrames();
  77
  78   void GotAcceleratedFrame(
  79       uint64 surface_handle,
  80       const std::vector<ui::LatencyInfo>& latency_info,
  81       const gfx::Size& pixel_size,
  82       float scale_factor,
  83       const gfx::Rect& pixel_damage_rect,
  84       const base::Closure& drawn_callback);
  85
  86   void GotSoftwareFrame(float scale_factor, SkCanvas* canvas);
  87
  88  private:
  89   // IOSurfaceLayerClient implementation:
  90   bool IOSurfaceLayerShouldAckImmediately() const override;
  91   void IOSurfaceLayerDidDrawFrame() override;
  92   void IOSurfaceLayerHitError() override;
  93
  94   void GotAcceleratedCAContextFrame(CAContextID ca_context_id,
  95                                     const gfx::Size& pixel_size,
  96                                     float scale_factor);
  97
  98   void GotAcceleratedIOSurfaceFrame(IOSurfaceID io_surface_id,
  99                                     const gfx::Size& pixel_size,
 100                                     float scale_factor);
 101
 102   void AcknowledgeAcceleratedFrame();
 103
 104   // Remove a layer from the heirarchy and destroy it. Because the accelerated
 105   // layer types may be replaced by a layer of the same type, the layer to
 106   // destroy is parameterized, and, if it is the current layer, the current
 107   // layer is reset.
 108   void DestroyCAContextLayer(
 109       base::scoped_nsobject<CALayerHost> ca_context_layer);
 110   void DestroyIOSurfaceLayer(
 111       base::scoped_nsobject<IOSurfaceLayer> io_surface_layer);
 112   void DestroySoftwareLayer();
 113
 114   // The AcceleratedWidgetMacNSView that is using this as its internals.
 115   AcceleratedWidgetMacNSView* view_;
 116
 117   // A phony NSView handle used to identify this.
 118   gfx::AcceleratedWidget native_widget_;
 119
 120   // A flipped layer, which acts as the parent of the compositing and software
 121   // layers. This layer is flipped so that the we don't need to recompute the
 122   // origin for sub-layers when their position changes (this is impossible when
 123   // using remote layers, as their size change cannot be synchronized with the
 124   // window). This indirection is needed because flipping hosted layers (like
 125   // |background_layer_| of RenderWidgetHostViewCocoa) leads to unpredictable
 126   // behavior.
 127   base::scoped_nsobject<CALayer> flipped_layer_;
 128
 129   // The accelerated CoreAnimation layer hosted by the GPU process.
 130   base::scoped_nsobject<CALayerHost> ca_context_layer_;
 131
 132   // The locally drawn accelerated CoreAnimation layer.
 133   base::scoped_nsobject<IOSurfaceLayer> io_surface_layer_;
 134
 135   // The locally drawn software layer.
 136   base::scoped_nsobject<SoftwareLayer> software_layer_;
 137
 138   // If an accelerated frame has come in which has not yet been drawn and acked
 139   // then this is the latency info and the callback to make when the frame is
 140   // drawn. If there is no such frame then the callback is null.
 141   std::vector<ui::LatencyInfo> accelerated_latency_info_;
 142   base::Closure accelerated_frame_drawn_callback_;
 143
 144   // The size in DIP of the last swap received from |compositor_|.
 145   gfx::Size last_swap_size_dip_;
 146
 147   // Whether surfaces created by the widget should use the glFinish() workaround
 148   // after compositing.
 149   bool needs_gl_finish_workaround_;
 150
 151   DISALLOW_COPY_AND_ASSIGN(AcceleratedWidgetMac);
 152 };
 153
 154 #endif  // __OBJC__
 155
 156 ACCELERATED_WIDGET_MAC_EXPORT
 157 void AcceleratedWidgetMacGotAcceleratedFrame(
 158     gfx::AcceleratedWidget widget, uint64 surface_handle,
 159     const std::vector<ui::LatencyInfo>& latency_info,
 160     const gfx::Size& pixel_size,
 161     float scale_factor,
 162     const gfx::Rect& pixel_damage_rect,
 163     const base::Closure& drawn_callback,
 164     bool* disable_throttling, int* renderer_id);
 165
 166 ACCELERATED_WIDGET_MAC_EXPORT
 167 void AcceleratedWidgetMacGotSoftwareFrame(
 168     gfx::AcceleratedWidget widget, float scale_factor, SkCanvas* canvas);
 169
 170 }  // namespace ui
 171
 172 #endif  // UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_