blob: ac3cd1c5e59a5996bb4f150d195b3fb9fb968a07 [file] [log] [blame]
/*
* Copyright (c) 2014 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.
*/
#include <memory>
#include "webrtc/modules/desktop_capture/cropped_desktop_frame.h"
#include "webrtc/rtc_base/checks.h"
#include "webrtc/rtc_base/constructormagic.h"
namespace webrtc {
namespace {
DesktopRect TranslateRect(const DesktopRect& rect,
const DesktopVector& top_left) {
DesktopRect result = rect;
result.Translate(top_left);
return result;
}
} // namespace
// A DesktopFrame that is a sub-rect of another DesktopFrame.
class CroppedDesktopFrame : public DesktopFrame {
public:
CroppedDesktopFrame(std::unique_ptr<DesktopFrame> frame,
const DesktopRect& rect);
private:
std::unique_ptr<DesktopFrame> frame_;
RTC_DISALLOW_COPY_AND_ASSIGN(CroppedDesktopFrame);
};
std::unique_ptr<DesktopFrame> CreateCroppedDesktopFrame(
std::unique_ptr<DesktopFrame> frame,
const DesktopRect& rect) {
RTC_DCHECK(frame);
if (!DesktopRect::MakeSize(frame->size()).ContainsRect(rect)) {
return nullptr;
}
if (frame->size().equals(rect.size())) {
return frame;
}
return std::unique_ptr<DesktopFrame>(
new CroppedDesktopFrame(std::move(frame), rect));
}
CroppedDesktopFrame::CroppedDesktopFrame(std::unique_ptr<DesktopFrame> frame,
const DesktopRect& rect)
: DesktopFrame(TranslateRect(rect, frame->top_left()),
frame->stride(),
frame->GetFrameDataAtPos(rect.top_left()),
frame->shared_memory()) {
frame_ = std::move(frame);
}
} // namespace webrtc