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 #include "webrtc/modules/desktop_capture/desktop_frame_win.h"
12
13 #include "webrtc/system_wrappers/include/logging.h"
14
15 namespace webrtc {
16
DesktopFrameWin(DesktopSize size,int stride,uint8_t * data,SharedMemory * shared_memory,HBITMAP bitmap)17 DesktopFrameWin::DesktopFrameWin(DesktopSize size,
18 int stride,
19 uint8_t* data,
20 SharedMemory* shared_memory,
21 HBITMAP bitmap)
22 : DesktopFrame(size, stride, data, shared_memory),
23 bitmap_(bitmap),
24 owned_shared_memory_(shared_memory_) {
25 }
26
~DesktopFrameWin()27 DesktopFrameWin::~DesktopFrameWin() {
28 DeleteObject(bitmap_);
29 }
30
31 // static
Create(DesktopSize size,SharedMemory * shared_memory,HDC hdc)32 DesktopFrameWin* DesktopFrameWin::Create(DesktopSize size,
33 SharedMemory* shared_memory,
34 HDC hdc) {
35 int bytes_per_row = size.width() * kBytesPerPixel;
36
37 // Describe a device independent bitmap (DIB) that is the size of the desktop.
38 BITMAPINFO bmi = {};
39 bmi.bmiHeader.biHeight = -size.height();
40 bmi.bmiHeader.biWidth = size.width();
41 bmi.bmiHeader.biPlanes = 1;
42 bmi.bmiHeader.biBitCount = DesktopFrameWin::kBytesPerPixel * 8;
43 bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
44 bmi.bmiHeader.biSizeImage = bytes_per_row * size.height();
45
46 HANDLE section_handle = NULL;
47 if (shared_memory)
48 section_handle = shared_memory->handle();
49 void* data = NULL;
50 HBITMAP bitmap = CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, &data,
51 section_handle, 0);
52 if (!bitmap) {
53 LOG(LS_WARNING) << "Failed to allocate new window frame " << GetLastError();
54 delete shared_memory;
55 return NULL;
56 }
57
58 return new DesktopFrameWin(size, bytes_per_row,
59 reinterpret_cast<uint8_t*>(data),
60 shared_memory, bitmap);
61 }
62
63 } // namespace webrtc
64