electron/atom/browser/osr/osr_output_device.h

// Copyright (c) 2016 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#ifndef ATOM_BROWSER_OSR_OSR_OUTPUT_DEVICE_H_
#define ATOM_BROWSER_OSR_OSR_OUTPUT_DEVICE_H_

#include "base/callback.h"
#include "components/viz/service/display/software_output_device.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkCanvas.h"

namespace atom {

typedef base::Callback<void(const gfx::Rect&, const SkBitmap&)> OnPaintCallback;

class OffScreenOutputDevice : public viz::SoftwareOutputDevice {
 public:
  OffScreenOutputDevice(bool transparent, const OnPaintCallback& callback);
  ~OffScreenOutputDevice() override;

  // viz::SoftwareOutputDevice:
  void Resize(const gfx::Size& pixel_size, float scale_factor) override;
  SkCanvas* BeginPaint(const gfx::Rect& damage_rect) override;
  void EndPaint() override;

  void SetActive(bool active, bool paint);
  void OnPaint(const gfx::Rect& damage_rect);

 private:
  const bool transparent_;
  OnPaintCallback callback_;

  bool active_ = false;

  std::unique_ptr<SkCanvas> canvas_;
  std::unique_ptr<SkBitmap> bitmap_;
  gfx::Rect pending_damage_rect_;

  DISALLOW_COPY_AND_ASSIGN(OffScreenOutputDevice);
};

}  // namespace atom

#endif  // ATOM_BROWSER_OSR_OSR_OUTPUT_DEVICE_H_