LONG
APIENTRY
UserChangeDisplaySettings(
PUNICODE_STRING pustrDevice,
LPDEVMODEW pdm,
HWND hwnd,
DWORD flags,
LPVOID lParam)
{
DEVMODEW dm;
LONG lResult = DISP_CHANGE_SUCCESSFUL;
HKEY hkey;
NTSTATUS Status;
PPDEVOBJ ppdev;
//PDESKTOP pdesk;
/* If no DEVMODE is given, use registry settings */
if (!pdm)
{
/* Get the registry settings */
Status = UserEnumRegistryDisplaySettings(pustrDevice, &dm);
if (!NT_SUCCESS(Status))
{
ERR("Could not load registry settings\n");
return DISP_CHANGE_BADPARAM;
}
}
else if (pdm->dmSize < FIELD_OFFSET(DEVMODEW, dmFields))
return DISP_CHANGE_BADMODE; /* This is what winXP SP3 returns */
else
dm = *pdm;
/* Check params */
if ((dm.dmFields & (DM_PELSWIDTH | DM_PELSHEIGHT)) != (DM_PELSWIDTH | DM_PELSHEIGHT))
{
ERR("Devmode doesn't specify the resolution.\n");
return DISP_CHANGE_BADMODE;
}
/* Get the PDEV */
ppdev = EngpGetPDEV(pustrDevice);
if (!ppdev)
{
ERR("Failed to get PDEV\n");
return DISP_CHANGE_BADPARAM;
}
/* Fixup values */
if(dm.dmBitsPerPel == 0 || !(dm.dmFields & DM_BITSPERPEL))
{
dm.dmBitsPerPel = ppdev->pdmwDev->dmBitsPerPel;
dm.dmFields |= DM_BITSPERPEL;
}
if((dm.dmFields & DM_DISPLAYFREQUENCY) && (dm.dmDisplayFrequency == 0))
dm.dmDisplayFrequency = ppdev->pdmwDev->dmDisplayFrequency;
/* Look for the requested DEVMODE */
pdm = PDEVOBJ_pdmMatchDevMode(ppdev, &dm);
if (!pdm)
{
ERR("Could not find a matching DEVMODE\n");
lResult = DISP_CHANGE_BADMODE;
goto leave;
}
else if (flags & CDS_TEST)
{
/* It's possible, go ahead! */
lResult = DISP_CHANGE_SUCCESSFUL;
goto leave;
}
/* Shall we update the registry? */
if (flags & CDS_UPDATEREGISTRY)
{
/* Open the local or global settings key */
Status = UserOpenDisplaySettingsKey(&hkey, pustrDevice, flags & CDS_GLOBAL);
if (NT_SUCCESS(Status))
{
/* Store the settings */
RegWriteDisplaySettings(hkey, pdm);
/* Close the registry key */
ZwClose(hkey);
}
else
{
ERR("Could not open registry key\n");
lResult = DISP_CHANGE_NOTUPDATED;
}
}
/* Check if DEVMODE matches the current mode */
if (pdm == ppdev->pdmwDev && !(flags & CDS_RESET))
{
ERR("DEVMODE matches, nothing to do\n");
goto leave;
}
/* Shall we apply the settings? */
if (!(flags & CDS_NORESET))
{
ULONG ulResult;
PVOID pvOldCursor;
/* Remove mouse pointer */
pvOldCursor = UserSetCursor(NULL, TRUE);
/* Do the mode switch */
ulResult = PDEVOBJ_bSwitchMode(ppdev, pdm);
/* Restore mouse pointer, no hooks called */
UserSetCursor(pvOldCursor, TRUE);
/* Check for failure */
if (!ulResult)
{
ERR("Failed to set mode\n");
lResult = (lResult == DISP_CHANGE_NOTUPDATED) ?
DISP_CHANGE_FAILED : DISP_CHANGE_RESTART;
goto leave;
}
/* Update the system metrics */
InitMetrics();
//IntvGetDeviceCaps(&PrimarySurface, &GdiHandleTable->DevCaps);
/* Set new size of the monitor */
UserUpdateMonitorSize((HDEV)ppdev);
/* Remove all cursor clipping */
UserClipCursor(NULL);
//pdesk = IntGetActiveDesktop();
//IntHideDesktop(pdesk);
/* Send WM_DISPLAYCHANGE to all toplevel windows */
co_IntSendMessageTimeout(HWND_BROADCAST,
WM_DISPLAYCHANGE,
(WPARAM)ppdev->gdiinfo.cBitsPixel,
(LPARAM)(ppdev->gdiinfo.ulHorzRes + (ppdev->gdiinfo.ulVertRes << 16)),
SMTO_NORMAL,
100,
&ulResult);
//co_IntShowDesktop(pdesk, ppdev->gdiinfo.ulHorzRes, ppdev->gdiinfo.ulVertRes);
UserRedrawDesktop();
}
leave:
/* Release the PDEV */
PDEVOBJ_vRelease(ppdev);
return lResult;
}
static
PPDEVOBJ
EngpCreatePDEV(
PUNICODE_STRING pustrDeviceName,
PDEVMODEW pdm)
{
PGRAPHICS_DEVICE pGraphicsDevice;
PPDEVOBJ ppdev;
/* Try to find the GRAPHICS_DEVICE */
if (pustrDeviceName)
{
pGraphicsDevice = EngpFindGraphicsDevice(pustrDeviceName, 0, 0);
if (!pGraphicsDevice)
{
DPRINT1("No GRAPHICS_DEVICE found for %ls!\n",
pustrDeviceName ? pustrDeviceName->Buffer : 0);
return NULL;
}
}
else
{
pGraphicsDevice = gpPrimaryGraphicsDevice;
}
/* Allocate a new PDEVOBJ */
ppdev = PDEVOBJ_AllocPDEV();
if (!ppdev)
{
DPRINT1("failed to allocate a PDEV\n");
return NULL;
}
/* If no DEVMODEW is given, ... */
if (!pdm)
{
/* ... use the device's default one */
pdm = pGraphicsDevice->pDevModeList[pGraphicsDevice->iDefaultMode].pdm;
DPRINT("Using iDefaultMode = %ld\n", pGraphicsDevice->iDefaultMode);
}
/* Try to get a diplay driver */
ppdev->pldev = EngLoadImageEx(pdm->dmDeviceName, LDEV_DEVICE_DISPLAY);
if (!ppdev->pldev)
{
DPRINT1("Could not load display driver '%ls'\n",
pGraphicsDevice->pDiplayDrivers);
ExFreePoolWithTag(ppdev, GDITAG_PDEV);
return NULL;
}
/* Copy the function table */
ppdev->pfn = ppdev->pldev->pfn;
/* Set MovePointer function */
ppdev->pfnMovePointer = ppdev->pfn.MovePointer;
if (!ppdev->pfnMovePointer)
ppdev->pfnMovePointer = EngMovePointer;
ppdev->pGraphicsDevice = pGraphicsDevice;
ppdev->hsemDevLock = EngCreateSemaphore();
// Should we change the ative mode of pGraphicsDevice ?
ppdev->pdmwDev = PDEVOBJ_pdmMatchDevMode(ppdev, pdm) ;
/* FIXME! */
ppdev->flFlags = PDEV_DISPLAY;
/* HACK: Don't use the pointer */
ppdev->Pointer.Exclude.right = -1;
/* Call the driver to enable the PDEV */
if (!PDEVOBJ_bEnablePDEV(ppdev, pdm, NULL))
{
DPRINT1("Failed to enable PDEV!\n");
ASSERT(FALSE);
}
/* FIXME: this must be done in a better way */
pGraphicsDevice->StateFlags |= DISPLAY_DEVICE_ATTACHED_TO_DESKTOP;
/* Tell the driver that the PDEV is ready */
PDEVOBJ_vCompletePDEV(ppdev);
/* Return the PDEV */
return ppdev;
}
