65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
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/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/desktop_capture/cropped_desktop_frame.h"
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#include <memory>
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#include <utility>
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#include "modules/desktop_capture/desktop_region.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/constructor_magic.h"
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namespace webrtc {
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// A DesktopFrame that is a sub-rect of another DesktopFrame.
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class CroppedDesktopFrame : public DesktopFrame {
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public:
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CroppedDesktopFrame(std::unique_ptr<DesktopFrame> frame,
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const DesktopRect& rect);
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private:
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const std::unique_ptr<DesktopFrame> frame_;
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RTC_DISALLOW_COPY_AND_ASSIGN(CroppedDesktopFrame);
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};
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std::unique_ptr<DesktopFrame> CreateCroppedDesktopFrame(
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std::unique_ptr<DesktopFrame> frame,
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const DesktopRect& rect) {
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RTC_DCHECK(frame);
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if (!DesktopRect::MakeSize(frame->size()).ContainsRect(rect)) {
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return nullptr;
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}
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if (frame->size().equals(rect.size())) {
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return frame;
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}
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return std::unique_ptr<DesktopFrame>(
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new CroppedDesktopFrame(std::move(frame), rect));
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}
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CroppedDesktopFrame::CroppedDesktopFrame(std::unique_ptr<DesktopFrame> frame,
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const DesktopRect& rect)
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: DesktopFrame(rect.size(),
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frame->stride(),
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frame->GetFrameDataAtPos(rect.top_left()),
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frame->shared_memory()),
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frame_(std::move(frame)) {
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MoveFrameInfoFrom(frame_.get());
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set_top_left(frame_->top_left().add(rect.top_left()));
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mutable_updated_region()->IntersectWith(rect);
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mutable_updated_region()->Translate(-rect.left(), -rect.top());
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}
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} // namespace webrtc
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