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/*
* Copyright (c) 2013 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.
*/
#include "modules/desktop_capture/desktop_frame_win.h"
#include <utility>
#include "rtc_base/logging.h"
namespace webrtc {
DesktopFrameWin::DesktopFrameWin(DesktopSize size,
int stride,
uint8_t* data,
std::unique_ptr<SharedMemory> shared_memory,
HBITMAP bitmap)
: DesktopFrame(size, stride, data, shared_memory.get()),
bitmap_(bitmap),
owned_shared_memory_(std::move(shared_memory)) {}
DesktopFrameWin::~DesktopFrameWin() {
DeleteObject(bitmap_);
}
// static
std::unique_ptr<DesktopFrameWin> DesktopFrameWin::Create(
DesktopSize size,
SharedMemoryFactory* shared_memory_factory,
HDC hdc) {
int bytes_per_row = size.width() * kBytesPerPixel;
int buffer_size = bytes_per_row * size.height();
// Describe a device independent bitmap (DIB) that is the size of the desktop.
BITMAPINFO bmi = {};
bmi.bmiHeader.biHeight = -size.height();
bmi.bmiHeader.biWidth = size.width();
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = DesktopFrameWin::kBytesPerPixel * 8;
bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
bmi.bmiHeader.biSizeImage = bytes_per_row * size.height();
std::unique_ptr<SharedMemory> shared_memory;
HANDLE section_handle = nullptr;
if (shared_memory_factory) {
shared_memory = shared_memory_factory->CreateSharedMemory(buffer_size);
if (!shared_memory) {
RTC_LOG(LS_WARNING) << "Failed to allocate shared memory";
return nullptr;
}
section_handle = shared_memory->handle();
}
void* data = nullptr;
HBITMAP bitmap =
CreateDIBSection(hdc, &bmi, DIB_RGB_COLORS, &data, section_handle, 0);
if (!bitmap) {
RTC_LOG(LS_WARNING) << "Failed to allocate new window frame "
<< GetLastError();
return nullptr;
}
return std::unique_ptr<DesktopFrameWin>(
new DesktopFrameWin(size, bytes_per_row, reinterpret_cast<uint8_t*>(data),
std::move(shared_memory), bitmap));
}
} // namespace webrtc
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