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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 COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_WIN_H_
#define COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_WIN_H_
#include <windows.h>
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/threading/thread_checker.h"
#include "components/viz/service/display/software_output_device.h"
#include "components/viz/service/display_embedder/output_device_backing.h"
#include "components/viz/service/display_embedder/software_output_device_win_base.h"
#include "components/viz/service/viz_service_export.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/viz/privileged/mojom/compositing/display_private.mojom.h"
#include "services/viz/privileged/mojom/compositing/layered_window_updater.mojom.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "ui/gfx/frame_data.h"
namespace viz {
// SoftwareOutputDevice implementation that draws directly to the provided HWND.
// The backing buffer for paint is shared for all instances of this class.
class VIZ_SERVICE_EXPORT SoftwareOutputDeviceWinDirect
: public SoftwareOutputDeviceWinBase,
public OutputDeviceBacking::Client {
public:
SoftwareOutputDeviceWinDirect(HWND hwnd, OutputDeviceBacking* backing);
~SoftwareOutputDeviceWinDirect() override;
// SoftwareOutputDeviceWinBase implementation.
bool ResizeDelegated(const gfx::Size& viewport_pixel_size) override;
SkCanvas* BeginPaintDelegated() override;
void EndPaintDelegated(const gfx::Rect& damage_rect) override;
void NotifyClientResized() override;
// OutputDeviceBacking::Client implementation.
const gfx::Size& GetViewportPixelSize() const override;
void ReleaseCanvas() override;
private:
const raw_ptr<OutputDeviceBacking> backing_;
std::unique_ptr<SkCanvas> canvas_;
};
// SoftwareOutputDevice implementation that uses layered window API to draw
// indirectly. Since UpdateLayeredWindow() is blocked by the GPU sandbox an
// implementation of mojom::LayeredWindowUpdater in the browser process handles
// calling UpdateLayeredWindow. Pixel backing is in a SharedMemoryRegion so no
// copying between processes is required.
class VIZ_SERVICE_EXPORT SoftwareOutputDeviceWinProxy
: public SoftwareOutputDeviceWinBase {
public:
SoftwareOutputDeviceWinProxy(
HWND hwnd,
mojo::PendingRemote<mojom::LayeredWindowUpdater> layered_window_updater);
~SoftwareOutputDeviceWinProxy() override;
// SoftwareOutputDevice implementation.
void OnSwapBuffers(SwapBuffersCallback swap_ack_callback,
gfx::FrameData data) override;
// SoftwareOutputDeviceWinBase implementation.
bool ResizeDelegated(const gfx::Size& viewport_pixel_size) override;
SkCanvas* BeginPaintDelegated() override;
void EndPaintDelegated(const gfx::Rect& rect) override;
private:
// Runs |swap_ack_callback_| after draw has happened.
void DrawAck();
mojo::Remote<mojom::LayeredWindowUpdater> layered_window_updater_;
std::unique_ptr<SkCanvas> canvas_;
bool waiting_on_draw_ack_ = false;
base::OnceClosure swap_ack_callback_;
};
// Creates an appropriate SoftwareOutputDevice implementation.
VIZ_SERVICE_EXPORT std::unique_ptr<SoftwareOutputDevice>
CreateSoftwareOutputDeviceWin(HWND hwnd,
OutputDeviceBacking* backing,
mojom::DisplayClient* display_client,
HWND& child_hwnd);
} // namespace viz
#endif // COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_WIN_H_
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