1 /*
2 * Copyright (c) 2013 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_CAPTURE_TYPES_H_
12 #define MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURE_TYPES_H_
13
14 #include <stdint.h>
15
16 namespace webrtc {
17
18 // Type used to identify windows on the desktop. Values are platform-specific:
19 // - On Windows: HWND cast to intptr_t.
20 // - On Linux (with X11): X11 Window (unsigned long) type cast to intptr_t.
21 // - On OSX: integer window number.
22 typedef intptr_t WindowId;
23
24 const WindowId kNullWindowId = 0;
25
26 // Type used to identify screens on the desktop. Values are platform-specific:
27 // - On Windows: integer display device index.
28 // - On OSX: CGDirectDisplayID cast to intptr_t.
29 // - On Linux (with X11): TBD.
30 // On Windows, ScreenId is implementation dependent: sending a ScreenId from one
31 // implementation to another usually won't work correctly.
32 typedef intptr_t ScreenId;
33
34 // The screen id corresponds to all screen combined together.
35 const ScreenId kFullDesktopScreenId = -1;
36
37 const ScreenId kInvalidScreenId = -2;
38
39 // An integer to attach to each DesktopFrame to differentiate the generator of
40 // the frame.
41 namespace DesktopCapturerId {
CreateFourCC(char a,char b,char c,char d)42 constexpr uint32_t CreateFourCC(char a, char b, char c, char d) {
43 return ((static_cast<uint32_t>(a)) | (static_cast<uint32_t>(b) << 8) |
44 (static_cast<uint32_t>(c) << 16) | (static_cast<uint32_t>(d) << 24));
45 }
46
47 constexpr uint32_t kUnknown = 0;
48 constexpr uint32_t kScreenCapturerWinGdi = CreateFourCC('G', 'D', 'I', ' ');
49 constexpr uint32_t kScreenCapturerWinDirectx = CreateFourCC('D', 'X', 'G', 'I');
50 } // namespace DesktopCapturerId
51
52 } // namespace webrtc
53
54 #endif // MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURE_TYPES_H_
55