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/*
* Copyright (c) 2020 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/win/wgc_capture_source.h"
#include <dwmapi.h>
#include <windows.graphics.capture.interop.h>
#include <windows.h>
#include <utility>
#include "modules/desktop_capture/win/screen_capture_utils.h"
#include "modules/desktop_capture/win/window_capture_utils.h"
#include "rtc_base/win/get_activation_factory.h"
using Microsoft::WRL::ComPtr;
namespace WGC = ABI::Windows::Graphics::Capture;
namespace webrtc {
WgcCaptureSource::WgcCaptureSource(DesktopCapturer::SourceId source_id)
: source_id_(source_id) {}
WgcCaptureSource::~WgcCaptureSource() = default;
bool WgcCaptureSource::IsCapturable() {
// If we can create a capture item, then we can capture it. Unfortunately,
// we can't cache this item because it may be created in a different COM
// apartment than where capture will eventually start from.
ComPtr<WGC::IGraphicsCaptureItem> item;
return SUCCEEDED(CreateCaptureItem(&item));
}
bool WgcCaptureSource::FocusOnSource() {
return false;
}
ABI::Windows::Graphics::SizeInt32 WgcCaptureSource::GetSize() {
if (!item_)
return {0, 0};
ABI::Windows::Graphics::SizeInt32 item_size;
HRESULT hr = item_->get_Size(&item_size);
if (FAILED(hr))
return {0, 0};
return item_size;
}
HRESULT WgcCaptureSource::GetCaptureItem(
ComPtr<WGC::IGraphicsCaptureItem>* result) {
HRESULT hr = S_OK;
if (!item_)
hr = CreateCaptureItem(&item_);
*result = item_;
return hr;
}
WgcCaptureSourceFactory::~WgcCaptureSourceFactory() = default;
WgcWindowSourceFactory::WgcWindowSourceFactory() = default;
WgcWindowSourceFactory::~WgcWindowSourceFactory() = default;
std::unique_ptr<WgcCaptureSource> WgcWindowSourceFactory::CreateCaptureSource(
DesktopCapturer::SourceId source_id) {
return std::make_unique<WgcWindowSource>(source_id);
}
WgcScreenSourceFactory::WgcScreenSourceFactory() = default;
WgcScreenSourceFactory::~WgcScreenSourceFactory() = default;
std::unique_ptr<WgcCaptureSource> WgcScreenSourceFactory::CreateCaptureSource(
DesktopCapturer::SourceId source_id) {
return std::make_unique<WgcScreenSource>(source_id);
}
WgcWindowSource::WgcWindowSource(DesktopCapturer::SourceId source_id)
: WgcCaptureSource(source_id) {}
WgcWindowSource::~WgcWindowSource() = default;
DesktopVector WgcWindowSource::GetTopLeft() {
DesktopRect window_rect;
if (!GetWindowRect(reinterpret_cast<HWND>(GetSourceId()), &window_rect))
return DesktopVector();
return window_rect.top_left();
}
ABI::Windows::Graphics::SizeInt32 WgcWindowSource::GetSize() {
RECT window_rect;
HRESULT hr = ::DwmGetWindowAttribute(
reinterpret_cast<HWND>(GetSourceId()), DWMWA_EXTENDED_FRAME_BOUNDS,
reinterpret_cast<void*>(&window_rect), sizeof(window_rect));
if (FAILED(hr))
return WgcCaptureSource::GetSize();
return {window_rect.right - window_rect.left,
window_rect.bottom - window_rect.top};
}
bool WgcWindowSource::IsCapturable() {
if (!IsWindowValidAndVisible(reinterpret_cast<HWND>(GetSourceId())))
return false;
return WgcCaptureSource::IsCapturable();
}
bool WgcWindowSource::FocusOnSource() {
if (!IsWindowValidAndVisible(reinterpret_cast<HWND>(GetSourceId())))
return false;
return ::BringWindowToTop(reinterpret_cast<HWND>(GetSourceId())) &&
::SetForegroundWindow(reinterpret_cast<HWND>(GetSourceId()));
}
HRESULT WgcWindowSource::CreateCaptureItem(
ComPtr<WGC::IGraphicsCaptureItem>* result) {
if (!ResolveCoreWinRTDelayload())
return E_FAIL;
ComPtr<IGraphicsCaptureItemInterop> interop;
HRESULT hr = GetActivationFactory<
IGraphicsCaptureItemInterop,
RuntimeClass_Windows_Graphics_Capture_GraphicsCaptureItem>(&interop);
if (FAILED(hr))
return hr;
ComPtr<WGC::IGraphicsCaptureItem> item;
hr = interop->CreateForWindow(reinterpret_cast<HWND>(GetSourceId()),
IID_PPV_ARGS(&item));
if (FAILED(hr))
return hr;
if (!item)
return E_HANDLE;
*result = std::move(item);
return hr;
}
WgcScreenSource::WgcScreenSource(DesktopCapturer::SourceId source_id)
: WgcCaptureSource(source_id) {
// Getting the HMONITOR could fail if the source_id is invalid. In that case,
// we leave hmonitor_ uninitialized and `IsCapturable()` will fail.
HMONITOR hmon;
if (GetHmonitorFromDeviceIndex(GetSourceId(), &hmon))
hmonitor_ = hmon;
}
WgcScreenSource::~WgcScreenSource() = default;
DesktopVector WgcScreenSource::GetTopLeft() {
if (!hmonitor_)
return DesktopVector();
return GetMonitorRect(*hmonitor_).top_left();
}
ABI::Windows::Graphics::SizeInt32 WgcScreenSource::GetSize() {
ABI::Windows::Graphics::SizeInt32 size = WgcCaptureSource::GetSize();
if (!hmonitor_ || (size.Width != 0 && size.Height != 0))
return size;
DesktopRect rect = GetMonitorRect(*hmonitor_);
return {rect.width(), rect.height()};
}
bool WgcScreenSource::IsCapturable() {
if (!hmonitor_)
return false;
if (!IsMonitorValid(*hmonitor_))
return false;
return WgcCaptureSource::IsCapturable();
}
HRESULT WgcScreenSource::CreateCaptureItem(
ComPtr<WGC::IGraphicsCaptureItem>* result) {
if (!hmonitor_)
return E_ABORT;
if (!ResolveCoreWinRTDelayload())
return E_FAIL;
ComPtr<IGraphicsCaptureItemInterop> interop;
HRESULT hr = GetActivationFactory<
IGraphicsCaptureItemInterop,
RuntimeClass_Windows_Graphics_Capture_GraphicsCaptureItem>(&interop);
if (FAILED(hr))
return hr;
// Ensure the monitor is still valid (hasn't disconnected) before trying to
// create the item. On versions of Windows before Win11, `CreateForMonitor`
// will crash if no displays are connected.
if (!IsMonitorValid(hmonitor_.value()))
return E_ABORT;
ComPtr<WGC::IGraphicsCaptureItem> item;
hr = interop->CreateForMonitor(*hmonitor_, IID_PPV_ARGS(&item));
if (FAILED(hr))
return hr;
if (!item)
return E_HANDLE;
*result = std::move(item);
return hr;
}
} // namespace webrtc
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