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/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_GENERATOR_H_
#define MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_GENERATOR_H_
#include <memory>
#include "modules/desktop_capture/desktop_frame.h"
#include "modules/desktop_capture/desktop_geometry.h"
#include "modules/desktop_capture/desktop_region.h"
#include "modules/desktop_capture/shared_memory.h"
namespace webrtc {
// An interface to generate a DesktopFrame.
class DesktopFrameGenerator {
public:
DesktopFrameGenerator();
virtual ~DesktopFrameGenerator();
virtual std::unique_ptr<DesktopFrame> GetNextFrame(
SharedMemoryFactory* factory) = 0;
};
// An interface to paint a DesktopFrame. This interface is used by
// PainterDesktopFrameGenerator.
class DesktopFramePainter {
public:
DesktopFramePainter();
virtual ~DesktopFramePainter();
virtual bool Paint(DesktopFrame* frame, DesktopRegion* updated_region) = 0;
};
// An implementation of DesktopFrameGenerator to take care about the
// DesktopFrame size, filling updated_region(), etc, but leaves the real
// painting work to a DesktopFramePainter implementation.
class PainterDesktopFrameGenerator final : public DesktopFrameGenerator {
public:
PainterDesktopFrameGenerator();
~PainterDesktopFrameGenerator() override;
std::unique_ptr<DesktopFrame> GetNextFrame(
SharedMemoryFactory* factory) override;
// Sets the size of the frame which will be returned in next GetNextFrame()
// call.
DesktopSize* size();
// Decides whether BaseDesktopFrameGenerator returns a frame in next Capture()
// callback. If return_frame_ is true, BaseDesktopFrameGenerator will create a
// frame according to both size_ and SharedMemoryFactory input, and uses
// Paint() function to paint it.
void set_return_frame(bool return_frame);
// Decides whether MockScreenCapturer returns a frame with updated regions.
// MockScreenCapturer will keep DesktopFrame::updated_region() empty if this
// field is false.
void set_provide_updated_region_hints(bool provide_updated_region_hints);
// Decides whether MockScreenCapturer randomly enlarges updated regions in the
// DesktopFrame. Set this field to true to simulate an inaccurate updated
// regions' return from OS APIs.
void set_enlarge_updated_region(bool enlarge_updated_region);
// The range to enlarge a updated region if `enlarge_updated_region_` is true.
// If this field is less than zero, it will be treated as zero, and
// `enlarge_updated_region_` will be ignored.
void set_enlarge_range(int enlarge_range);
// Decides whether BaseDesktopFrameGenerator randomly add some updated regions
// in the DesktopFrame. Set this field to true to simulate an inaccurate
// updated regions' return from OS APIs.
void set_add_random_updated_region(bool add_random_updated_region);
// Sets the painter object to do the real painting work, if no `painter_` has
// been set to this instance, the DesktopFrame returned by GetNextFrame()
// function will keep in an undefined but valid state.
// PainterDesktopFrameGenerator does not take ownership of the `painter`.
void set_desktop_frame_painter(DesktopFramePainter* painter);
private:
DesktopSize size_;
bool return_frame_;
bool provide_updated_region_hints_;
bool enlarge_updated_region_;
int enlarge_range_;
bool add_random_updated_region_;
DesktopFramePainter* painter_;
};
// An implementation of DesktopFramePainter to paint black on
// mutable_updated_region(), and white elsewhere.
class BlackWhiteDesktopFramePainter final : public DesktopFramePainter {
public:
BlackWhiteDesktopFramePainter();
~BlackWhiteDesktopFramePainter() override;
// The black regions of the frame which will be returned in next Paint()
// call. BlackWhiteDesktopFramePainter will draw a white frame, with black
// in the updated_region_. Each Paint() call will consume updated_region_.
DesktopRegion* updated_region();
// DesktopFramePainter interface.
bool Paint(DesktopFrame* frame, DesktopRegion* updated_region) override;
private:
DesktopRegion updated_region_;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_GENERATOR_H_
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