| /* |
| * 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 WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_DRAWER_H_ |
| #define WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_DRAWER_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| |
| #include "webrtc/modules/desktop_capture/rgba_color.h" |
| #include "webrtc/modules/desktop_capture/desktop_geometry.h" |
| |
| namespace webrtc { |
| |
| // A set of basic platform dependent functions to draw various shapes on the |
| // screen. |
| class ScreenDrawer { |
| public: |
| // Creates a ScreenDrawer for the current platform, returns nullptr if no |
| // ScreenDrawer implementation available. |
| static std::unique_ptr<ScreenDrawer> Create(); |
| |
| ScreenDrawer() {} |
| virtual ~ScreenDrawer() {} |
| |
| // Returns the region inside which DrawRectangle() function are expected to |
| // work, in capturer coordinates (assuming ScreenCapturer::SelectScreen has |
| // not been called). This region may exclude regions of the screen reserved by |
| // the OS for things like menu bars or app launchers. |
| virtual DesktopRect DrawableRegion() = 0; |
| |
| // Draws a rectangle to cover |rect| with |color|. Note, rect.bottom() and |
| // rect.right() two lines are not included. The part of |rect| which is out of |
| // DrawableRegion() will be ignored. |
| virtual void DrawRectangle(DesktopRect rect, RgbaColor color) = 0; |
| |
| // Clears all content on the screen by filling the area with black. |
| virtual void Clear() = 0; |
| |
| // Blocks current thread until OS finishes previous DrawRectangle() actions. |
| // ScreenCapturer should be able to capture the changes after this function |
| // finish. |
| virtual void WaitForPendingDraws() = 0; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_DRAWER_H_ |