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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_
#define UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_
#include "base/memory/raw_ptr.h"
#include "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
#include "ui/accelerated_widget_mac/ca_layer_frame_sink.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/native_widget_types.h"
namespace ui {
// 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:
// Called when the AcceleratedWidgetMac's CALayerFrameSink interface's
// UpdateCALayerTree method is called. This is used to update background
// colors and to suppressing drawing of blank windows until content is
// available.
virtual void AcceleratedWidgetCALayerParamsUpdated() = 0;
};
// AcceleratedWidgetMac owns a tree of CALayers. The widget may be passed
// to a ui::Compositor, which will, through its output surface, call the
// CALayerFrameSink interface. The CALayers may be installed in an NSView
// by setting the AcceleratedWidgetMacNSView for the helper.
class ACCELERATED_WIDGET_MAC_EXPORT AcceleratedWidgetMac
: public CALayerFrameSink {
public:
AcceleratedWidgetMac();
AcceleratedWidgetMac(const AcceleratedWidgetMac&) = delete;
AcceleratedWidgetMac& operator=(const AcceleratedWidgetMac&) = delete;
~AcceleratedWidgetMac() override;
gfx::AcceleratedWidget accelerated_widget() { return native_widget_; }
void SetNSView(AcceleratedWidgetMacNSView* view);
void ResetNSView();
// Returns the CALayer parameters most recently sent to the CALayerFrameSink
// interface, or nullptr if none are available.
const gfx::CALayerParams* GetCALayerParams() const;
// Return true if the last frame swapped has a size in DIP of |dip_size|.
bool HasFrameOfSize(const gfx::Size& dip_size) const;
// If |suspended| is true, then ignore all new frames that come in until
// a call is made with |suspended| as false.
void SetSuspended(bool suspended);
private:
// For CALayerFrameSink::FromAcceleratedWidget to access Get.
friend class CALayerFrameSink;
// Translate from a gfx::AcceleratedWidget handle to the underlying
// AcceleratedWidgetMac (used by other gfx::AcceleratedWidget translation
// functions).
static AcceleratedWidgetMac* Get(gfx::AcceleratedWidget widget);
// gfx::CALayerFrameSink implementation:
void UpdateCALayerTree(const gfx::CALayerParams& ca_layer_params) override;
// The AcceleratedWidgetMacNSView that is using this as its internals.
raw_ptr<AcceleratedWidgetMacNSView> view_ = nullptr;
// A phony NSView handle used to identify this.
gfx::AcceleratedWidget native_widget_ = gfx::kNullAcceleratedWidget;
// If the output surface is suspended, then updates to the layer parameters
// will be ignored.
bool is_suspended_ = false;
// The last CALayer parameter update from the CALayerFrameSink interface.
bool last_ca_layer_params_valid_ = false;
gfx::CALayerParams last_ca_layer_params_;
};
} // namespace ui
#endif // UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_
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