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// Copyright 2018 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_HOST_LAYERED_WINDOW_UPDATER_IMPL_H_
#define COMPONENTS_VIZ_HOST_LAYERED_WINDOW_UPDATER_IMPL_H_
#include <windows.h>
#include <memory>
#include "base/memory/unsafe_shared_memory_region.h"
#include "components/viz/host/viz_host_export.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "services/viz/privileged/mojom/compositing/layered_window_updater.mojom.h"
#include "ui/gfx/geometry/size.h"
class SkCanvas;
namespace viz {
// Makes layered window drawing syscalls. Updates a layered window from shared
// memory backing buffer that was drawn into by the GPU process. This is
// required as UpdateLayeredWindow() syscall is blocked by the GPU sandbox.
class VIZ_HOST_EXPORT LayeredWindowUpdaterImpl
: public mojom::LayeredWindowUpdater {
public:
LayeredWindowUpdaterImpl(
HWND hwnd,
mojo::PendingReceiver<mojom::LayeredWindowUpdater> receiver);
LayeredWindowUpdaterImpl(const LayeredWindowUpdaterImpl&) = delete;
LayeredWindowUpdaterImpl& operator=(const LayeredWindowUpdaterImpl&) = delete;
~LayeredWindowUpdaterImpl() override;
// mojom::LayeredWindowUpdater implementation.
void OnAllocatedSharedMemory(const gfx::Size& pixel_size,
base::UnsafeSharedMemoryRegion region) override;
void Draw(DrawCallback draw_callback) override;
private:
const HWND hwnd_;
mojo::Receiver<mojom::LayeredWindowUpdater> receiver_;
std::unique_ptr<SkCanvas> canvas_;
};
} // namespace viz
#endif // COMPONENTS_VIZ_HOST_LAYERED_WINDOW_UPDATER_IMPL_H_
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