PuF*_*F1k 2 c++ winapi multiple-monitors
我正在创建一个小程序，它将包含桌面中的所有显示器（扩展模式）或禁用所有辅助显示器（显示器可以连接到 GPU 和集成显卡）。
该程序适用于Windows 7，因此根据互联网上的信息，我决定使用CCD API，但遇到了SetDisplayConfig()函数的问题。例如，关闭所有辅助显示器的代码可以完美运行，因为“i”递增其中一个显示器将关闭：
UINT32 PathCount = 0; //path count
UINT32 ModeCount = 0; //mode count
HRESULT hr;
hr = GetDisplayConfigBufferSizes(QDC_ALL_PATHS, &PathCount, &ModeCount);
std::vector<DISPLAYCONFIG_PATH_INFO> pathArray(PathCount);
std::vector<DISPLAYCONFIG_MODE_INFO> modeArray(ModeCount);
hr = QueryDisplayConfig(QDC_ALL_PATHS, &PathCount, &pathArray[0], &ModeCount, &modeArray[0], NULL);
for (int i = 1; i < PathCount;i++)
{
if(pathArray[i].flags != 0)
{
pathArray[i].flags = 0;
hr = SetDisplayConfig(PathCount, &pathArray[0], ModeCount, &modeArray[0], SDC_APPLY | SDC_USE_SUPPLIED_DISPLAY_CONFIG | SDC_ALLOW_CHANGES);
}
}
为了扩展显示，我找到了这段代码：
SetDisplayConfig(0, NULL, 0, NULL, SDC_TOPOLOGY_EXTEND | SDC_APPLY);
具有此特定参数的此功能有效，但它仅针对连接到 GPU 作为主显示器的第二个显示器，而不是连接到主板的第三个显示器（仅在我以物理方式从 GPU 断开第二个显示器后，此功能才有效）显示器连接到主板）。
我尝试使用
for (int i = 1; i < PathCount;i++)
{
if(pathArray[i].flags != 1)
{
pathArray[i].flags = 1;
hr = SetDisplayConfig(PathCount, &pathArray[0], ModeCount, &modeArray[0], SDC_TOPOLOGY_EXTEND | SDC_APPLY | SDC_PATH_PERSIST_IF_REQUIRED);
}
}
但收到 ERROR_ADAP_HDW_ERR 错误
所以我请求帮助我。如何使用带有“SDC_TOPOLOGY_EXTEND”标志的 SetDisplayConfig() 函数来定位特定显示器（或一次所有显示器），或者还有另一种方法来解决此问题？
所以我做到了，它不适用于某些奇特的显示设置（如多个 USB 显示器），但它可以工作，并且所有显示器都添加到桌面（或桌面拉伸到所有显示器）
我是怎么做到的？Microsoft detours 帮助了我，通过监视 Windows 10 中的系统设置在我将显示添加到桌面时执行的操作，它只是将最重要的属性设置为默认值。注释部分仅适用于 win 10。
HRESULT hr = S_OK;
UINT32 NumPathArrayElements = 0;
UINT32 NumModeInfoArrayElements = 0;
//LONG error = GetDisplayConfigBufferSizes((QDC_ALL_PATHS | QDC_VIRTUAL_MODE_AWARE), &NumPathArrayElements, &NumModeInfoArrayElements);
hr = GetDisplayConfigBufferSizes((QDC_ALL_PATHS), &NumPathArrayElements, &NumModeInfoArrayElements);
std::vector<DISPLAYCONFIG_PATH_INFO> PathInfoArray2(NumPathArrayElements);
std::vector<DISPLAYCONFIG_MODE_INFO> ModeInfoArray2(NumModeInfoArrayElements);
//error = QueryDisplayConfig((QDC_ALL_PATHS | QDC_VIRTUAL_MODE_AWARE), &NumPathArrayElements, &PathInfoArray2[0], &NumModeInfoArrayElements, &ModeInfoArray2[0], NULL);
hr = QueryDisplayConfig((QDC_ALL_PATHS), &NumPathArrayElements, &PathInfoArray2[0], &NumModeInfoArrayElements, &ModeInfoArray2[0], NULL);
struct displaySourcePair
{
std::wstring displayName;
UINT32 displayId;
};
std::vector<displaySourcePair> ocupiedDisplays;
if (hr == S_OK)
{
DISPLAYCONFIG_SOURCE_DEVICE_NAME SourceName = {};
SourceName.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME;
SourceName.header.size = sizeof(SourceName);
DISPLAYCONFIG_TARGET_PREFERRED_MODE PreferedMode = {};
PreferedMode.header.type = DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_PREFERRED_MODE;
PreferedMode.header.size = sizeof(PreferedMode);
int newId = 0;
for (UINT32 i = 0; i < NumPathArrayElements; i++)
{
bool match = false;
SourceName.header.adapterId = PathInfoArray2[i].sourceInfo.adapterId;
SourceName.header.id = PathInfoArray2[i].sourceInfo.id;
PreferedMode.header.adapterId = PathInfoArray2[i].targetInfo.adapterId;
PreferedMode.header.id = PathInfoArray2[i].targetInfo.id;
hr = HRESULT_FROM_WIN32(DisplayConfigGetDeviceInfo(&SourceName.header));
hr = HRESULT_FROM_WIN32(DisplayConfigGetDeviceInfo(&PreferedMode.header));
if (hr == S_OK)
{
if ((PathInfoArray2[i].flags & DISPLAYCONFIG_PATH_ACTIVE) == true)
{
std::wstring str = std::wstring(SourceName.viewGdiDeviceName);
displaySourcePair tmpStruct;
tmpStruct.displayId = PreferedMode.header.id;
tmpStruct.displayName = str;
ocupiedDisplays.push_back(tmpStruct);
}
for (int k = 0; k < ocupiedDisplays.size(); k++)
{
std::wstring str = std::wstring(SourceName.viewGdiDeviceName);
if (ocupiedDisplays[k].displayName == str || ocupiedDisplays[k].displayId == PreferedMode.header.id)
{
match = true;
}
}
if (match == false && PathInfoArray2[i].targetInfo.targetAvailable == 1)
{
PathInfoArray2[i].flags |= DISPLAYCONFIG_PATH_ACTIVE;
std::wstring str = std::wstring(SourceName.viewGdiDeviceName);
displaySourcePair tmpStruct;
tmpStruct.displayId = PreferedMode.header.id;
tmpStruct.displayName = str;
ocupiedDisplays.push_back(tmpStruct);
}
if (PathInfoArray2[i].targetInfo.targetAvailable == 1)
{
PathInfoArray2[i].sourceInfo.id = newId;
newId++;
}
if (PathInfoArray2[i].targetInfo.id != PreferedMode.header.id)
{
PathInfoArray2[i].targetInfo.id = PreferedMode.header.id;
}
PathInfoArray2[i].sourceInfo.modeInfoIdx = DISPLAYCONFIG_PATH_MODE_IDX_INVALID;
PathInfoArray2[i].targetInfo.modeInfoIdx = DISPLAYCONFIG_PATH_MODE_IDX_INVALID;
}
}
//hr = SetDisplayConfig(NumPathArrayElements, &PathInfoArray2[0], 0, NULL, (SDC_VALIDATE | SDC_TOPOLOGY_SUPPLIED | SDC_ALLOW_PATH_ORDER_CHANGES | SDC_VIRTUAL_MODE_AWARE));
//hr = SetDisplayConfig(NumPathArrayElements, &PathInfoArray2[0], 0, NULL, (SDC_APPLY | SDC_TOPOLOGY_SUPPLIED | SDC_ALLOW_PATH_ORDER_CHANGES | SDC_VIRTUAL_MODE_AWARE));
hr = SetDisplayConfig(NumPathArrayElements, &PathInfoArray2[0], 0, NULL, (SDC_VALIDATE | SDC_TOPOLOGY_SUPPLIED | SDC_ALLOW_PATH_ORDER_CHANGES));
hr = SetDisplayConfig(NumPathArrayElements, &PathInfoArray2[0], 0, NULL, (SDC_APPLY | SDC_TOPOLOGY_SUPPLIED | SDC_ALLOW_PATH_ORDER_CHANGES));
}