53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
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/*
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* Copyright (c) 2016 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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#ifndef MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_ROTATION_H_
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#define MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_ROTATION_H_
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#include "modules/desktop_capture/desktop_frame.h"
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#include "modules/desktop_capture/desktop_geometry.h"
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namespace webrtc {
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// Represents the rotation of a DesktopFrame.
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enum class Rotation {
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CLOCK_WISE_0,
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CLOCK_WISE_90,
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CLOCK_WISE_180,
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CLOCK_WISE_270,
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};
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// Rotates input DesktopFrame |source|, copies pixel in an unrotated rectangle
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// |source_rect| into the target rectangle of another DesktopFrame |target|.
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// Target rectangle here is the rotated |source_rect| plus |target_offset|.
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// |rotation| specifies |source| to |target| rotation. |source_rect| is in
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// |source| coordinate. |target_offset| is in |target| coordinate.
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// This function triggers check failure if |source| does not cover the
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// |source_rect|, or |target| does not cover the rotated |rect|.
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void RotateDesktopFrame(const DesktopFrame& source,
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const DesktopRect& source_rect,
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const Rotation& rotation,
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const DesktopVector& target_offset,
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DesktopFrame* target);
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// Returns a reverse rotation of |rotation|.
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Rotation ReverseRotation(Rotation rotation);
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// Returns a rotated DesktopSize of |size|.
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DesktopSize RotateSize(DesktopSize size, Rotation rotation);
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// Returns a rotated DesktopRect of |rect|. The |size| represents the size of
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// the DesktopFrame which |rect| belongs in.
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DesktopRect RotateRect(DesktopRect rect, DesktopSize size, Rotation rotation);
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} // namespace webrtc
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#endif // MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_ROTATION_H_
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