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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/win/desktop.h"
#include <vector>
#include "rtc_base/logging.h"
#include "rtc_base/string_utils.h"
namespace webrtc {
Desktop::Desktop(HDESK desktop, bool own) : desktop_(desktop), own_(own) {}
Desktop::~Desktop() {
if (own_ && desktop_ != NULL) {
if (!::CloseDesktop(desktop_)) {
RTC_LOG(LS_ERROR) << "Failed to close the owned desktop handle: "
<< GetLastError();
}
}
}
bool Desktop::GetName(std::wstring* desktop_name_out) const {
if (desktop_ == NULL)
return false;
DWORD length = 0;
int rv = GetUserObjectInformationW(desktop_, UOI_NAME, NULL, 0, &length);
if (rv || GetLastError() != ERROR_INSUFFICIENT_BUFFER)
abort();
length /= sizeof(WCHAR);
std::vector<WCHAR> buffer(length);
if (!GetUserObjectInformationW(desktop_, UOI_NAME, &buffer[0],
length * sizeof(WCHAR), &length)) {
RTC_LOG(LS_ERROR) << "Failed to query the desktop name: " << GetLastError();
return false;
}
desktop_name_out->assign(&buffer[0], length / sizeof(WCHAR));
return true;
}
bool Desktop::IsSame(const Desktop& other) const {
std::wstring name;
if (!GetName(&name))
return false;
std::wstring other_name;
if (!other.GetName(&other_name))
return false;
return name == other_name;
}
bool Desktop::SetThreadDesktop() const {
if (!::SetThreadDesktop(desktop_)) {
RTC_LOG(LS_ERROR) << "Failed to assign the desktop to the current thread: "
<< GetLastError();
return false;
}
return true;
}
Desktop* Desktop::GetDesktop(const WCHAR* desktop_name) {
ACCESS_MASK desired_access = DESKTOP_CREATEMENU | DESKTOP_CREATEWINDOW |
DESKTOP_ENUMERATE | DESKTOP_HOOKCONTROL |
DESKTOP_WRITEOBJECTS | DESKTOP_READOBJECTS |
DESKTOP_SWITCHDESKTOP | GENERIC_WRITE;
HDESK desktop = OpenDesktopW(desktop_name, 0, FALSE, desired_access);
if (desktop == NULL) {
RTC_LOG(LS_ERROR) << "Failed to open the desktop '"
<< rtc::ToUtf8(desktop_name) << "': " << GetLastError();
return NULL;
}
return new Desktop(desktop, true);
}
Desktop* Desktop::GetInputDesktop() {
HDESK desktop = OpenInputDesktop(
0, FALSE, GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE);
if (desktop == NULL)
return NULL;
return new Desktop(desktop, true);
}
Desktop* Desktop::GetThreadDesktop() {
HDESK desktop = ::GetThreadDesktop(GetCurrentThreadId());
if (desktop == NULL) {
RTC_LOG(LS_ERROR)
<< "Failed to retrieve the handle of the desktop assigned to "
"the current thread: "
<< GetLastError();
return NULL;
}
return new Desktop(desktop, false);
}
} // namespace webrtc
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