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#include "stdafx.h"
#include <stdio.h>
#include "windows.h"
#include "DisplayUtils.h"
#define MAX_DEVICE_NUMBER 10
#define WIN2K_MAJOR_BUILD 5
#define WIN2K_MINOR_BUILD 0
#define QUMRANET_DEVICE_SIGNATURE L"Red Hat"
//#define DEBUG
BOOL isWin2K()
{
OSVERSIONINFO ver;
ver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if (GetVersionEx(&ver)) {
if (WIN2K_MAJOR_BUILD == ver.dwMajorVersion &&
WIN2K_MINOR_BUILD == ver.dwMinorVersion) {
return TRUE;
}
}
return FALSE;
}
BOOL isAttached(LPCTSTR DeviceName)
{
DEVMODE DevMode;
ZeroMemory(&DevMode, sizeof(DEVMODE));
DevMode.dmSize = sizeof(DEVMODE);
DevMode.dmDriverExtra = 0;
EnumDisplaySettings(DeviceName, ENUM_CURRENT_SETTINGS, &DevMode);
return !!DevMode.dmBitsPerPel;
}
void InitModeStructure(DEVMODE *DevMode, MonitorConfig *MonConfig, BOOL bSetPos)
{
ZeroMemory(DevMode, sizeof(DEVMODE));
DevMode->dmSize = sizeof(DEVMODE);
if (MonConfig) {
DevMode->dmBitsPerPel = MonConfig->dwDepth;
DevMode->dmPelsWidth = MonConfig->dwWidth;
DevMode->dmPelsHeight = MonConfig->dwHeight;
DevMode->dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
if (bSetPos) {
DevMode->dmPosition.x = MonConfig->dwPosX;
DevMode->dmPosition.y = MonConfig->dwPosY;
DevMode->dmFields |= DM_POSITION;
}
} else {
//detach monitor
DevMode->dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_POSITION;
}
}
BOOL GetQxlDeviceID(CHAR *DeviceKey, DWORD *DeviceID)
{
DWORD dwType = REG_BINARY;
DWORD dwSize = sizeof(*DeviceID);
BOOL bKeyFound = FALSE;
HKEY hKey;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, strstr(DeviceKey, "System"),
0L, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
bKeyFound = (RegQueryValueEx(hKey, "QxlDeviceID", NULL, &dwType,
(LPBYTE)DeviceID, &dwSize) == ERROR_SUCCESS);
RegCloseKey(hKey);
}
return bKeyFound;
}
int ChangeResolution(TCHAR *strDevicePNPID, BOOL bAll, BOOL bAttach, BOOL bPosition,
int nMons, MonitorConfig *monConfig)
{
DISPLAY_DEVICE displayDevice;
DEVMODE DevMode;
HDESK hdeskInput;
HDESK hdeskCurrent;
BOOL attached;
int monsCount = 0;
int totalWidth = 0;
int ret;
hdeskCurrent = GetThreadDesktop(GetCurrentThreadId());
if (hdeskCurrent == NULL)
return 0;
hdeskInput = OpenInputDesktop(0, FALSE, MAXIMUM_ALLOWED);
if (hdeskInput == NULL)
return 0;
if (!SetThreadDesktop(hdeskInput)) {
CloseDesktop(hdeskInput);
return 0;
}
for (DWORD dwI = 0; dwI < MAX_DEVICE_NUMBER; dwI++) {
displayDevice.cb = sizeof(DISPLAY_DEVICE);
if (EnumDisplayDevices(NULL, dwI, &displayDevice, 0)) {
printf("id=%s\n", displayDevice.DeviceID);
if (displayDevice.DeviceID && displayDevice.DeviceID[0] &&
(bAll || _tcsstr(displayDevice.DeviceID, strDevicePNPID))) {
if (isWin2K()) {
ChangeDisplaySettings(NULL, 0);
}
DWORD dwDeviceID = 0;
if (!bAll && !GetQxlDeviceID(displayDevice.DeviceKey, &dwDeviceID)) {
#ifdef DEBUG
dwDeviceID = monsCount;
#else
continue;
#endif
}
if ((int)dwDeviceID < nMons) {
attached = isAttached(displayDevice.DeviceName);
InitModeStructure(&DevMode, &monConfig[dwDeviceID], (attached && !bPosition) ? FALSE : bAttach);
if (bAll) {
DevMode.dmPosition.x = monsCount * DevMode.dmPelsWidth;
} else if (bAttach && !attached && !bPosition) {
DevMode.dmPosition.x = totalWidth;
}
totalWidth += monConfig[dwDeviceID].dwWidth;
} else {
InitModeStructure(&DevMode, NULL, FALSE);
}
ret = ChangeDisplaySettingsEx(displayDevice.DeviceName, &DevMode,
NULL, CDS_RESET | CDS_GLOBAL |
CDS_UPDATEREGISTRY, NULL);
if (ret == DISP_CHANGE_SUCCESSFUL) {
monsCount++;
}
}
}
}
if (monsCount) {
ChangeDisplaySettings(NULL, 0);
}
SetThreadDesktop(hdeskCurrent);
CloseDesktop(hdeskInput);
return monsCount;
}
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