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/interface/logging.h" 14 15 namespace webrtc { 16 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 27 DesktopFrameWin::~DesktopFrameWin() { 28 DeleteObject(bitmap_); 29 } 30 31 // static 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 = {0}; 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
