1 /* 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_ROTATION_H_ 12 #define MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_ROTATION_H_ 13 14 #include "modules/desktop_capture/desktop_frame.h" 15 #include "modules/desktop_capture/desktop_geometry.h" 16 17 namespace webrtc { 18 19 // Represents the rotation of a DesktopFrame. 20 enum class Rotation { 21 CLOCK_WISE_0, 22 CLOCK_WISE_90, 23 CLOCK_WISE_180, 24 CLOCK_WISE_270, 25 }; 26 27 // Rotates input DesktopFrame `source`, copies pixel in an unrotated rectangle 28 // `source_rect` into the target rectangle of another DesktopFrame `target`. 29 // Target rectangle here is the rotated `source_rect` plus `target_offset`. 30 // `rotation` specifies `source` to `target` rotation. `source_rect` is in 31 // `source` coordinate. `target_offset` is in `target` coordinate. 32 // This function triggers check failure if `source` does not cover the 33 // `source_rect`, or `target` does not cover the rotated `rect`. 34 void RotateDesktopFrame(const DesktopFrame& source, 35 const DesktopRect& source_rect, 36 const Rotation& rotation, 37 const DesktopVector& target_offset, 38 DesktopFrame* target); 39 40 // Returns a reverse rotation of `rotation`. 41 Rotation ReverseRotation(Rotation rotation); 42 43 // Returns a rotated DesktopSize of `size`. 44 DesktopSize RotateSize(DesktopSize size, Rotation rotation); 45 46 // Returns a rotated DesktopRect of `rect`. The `size` represents the size of 47 // the DesktopFrame which `rect` belongs in. 48 DesktopRect RotateRect(DesktopRect rect, DesktopSize size, Rotation rotation); 49 50 } // namespace webrtc 51 52 #endif // MODULES_DESKTOP_CAPTURE_DESKTOP_FRAME_ROTATION_H_ 53