VideoCapture::VideoCapture()
{
cameraInitialized = false;
CoInitialize(NULL);
ZeroVariables();
if (EnumDevices()==0) throw -1;
EnumResolutions();
}
void CameraDialog::OnCbnSelchangeComboCamera()
{
EnumResolutions();
// Capture->CloseInterfaces();
}
DWORD
DrvDeviceCapabilities(
HANDLE hPrinter,
PWSTR pDeviceName,
WORD wCapability,
PVOID pOutput,
PDEVMODE pDevmode
)
/*++
Routine Description:
Provides information about the specified device and its capabilities
Arguments:
hPrinter - Identifies a printer object
pDeviceName - Points to a null-terminated device name string
wCapability - Specifies the interested device capability
pOutput - Points to the output buffer
pDevmode - Points to the source devmode structure
Return Value:
The return value depends on iDevCap.
Please refer for DDK documentation for more details.
--*/
{
XLDEVMODE dm;
PMPD pmpd;
DWORD result;
FORM_INFO_1 *pFormsDB;
DWORD cForms;
//
// Load printer description data
//
if (! (pmpd = LoadMpdFile(hPrinter))) {
Error(("Failed to load printer description data\n"));
return GDI_ERROR;
}
//
// Validate source devmode and combine it with driver default
//
if (! GetCombinedDevmode(&dm, pDevmode, hPrinter, pmpd)) {
Error(("Bad input devmode\n"));
UnloadMpdFile(pmpd);
return GDI_ERROR;
}
pDevmode = &dm.dmPublic;
switch (wCapability) {
case DC_VERSION:
result = pDevmode->dmSpecVersion;
break;
case DC_DRIVER:
result = pDevmode->dmDriverVersion;
break;
case DC_SIZE:
result = pDevmode->dmSize;
break;
case DC_EXTRA:
result = pDevmode->dmDriverExtra;
break;
case DC_FIELDS:
result = pDevmode->dmFields;
break;
case DC_COPIES:
result = MAX_COPIES;
break;
case DC_DUPLEX:
result = SupportDuplex(pmpd) ? 1 : 0;
break;
case DC_TRUETYPE:
result = pDevmode->dmTTOption;
break;
case DC_ORIENTATION:
//
// Normal landscape rotates counterclockwise
// Rotated landscape rotates clockwise
//
result = LandscapeRotation(&dm);
break;
case DC_PAPERNAMES:
case DC_PAPERS:
case DC_PAPERSIZE:
case DC_MINEXTENT:
case DC_MAXEXTENT:
//
// Get a list of forms in the forms database
//
pFormsDB = GetFormsDatabase(hPrinter, &cForms);
if (pFormsDB == NULL || cForms == 0) {
Error(("Cannot get system forms\n"));
UnloadMpdFile(pmpd);
return GDI_ERROR;
}
FilterFormsDatabase(pFormsDB, cForms, pmpd);
switch (wCapability) {
case DC_MINEXTENT:
case DC_MAXEXTENT:
result = CalcMinMaxExtent(pOutput, pmpd, pFormsDB, cForms, wCapability);
break;
case DC_PAPERNAMES:
case DC_PAPERS:
case DC_PAPERSIZE:
result = EnumPaperSizes(pOutput, pmpd, pFormsDB, cForms, wCapability);
break;
}
MemFree(pFormsDB);
break;
case DC_BINNAMES:
case DC_BINS:
result = EnumOutputBins(pOutput, pmpd, wCapability);
break;
case DC_ENUMRESOLUTIONS:
result = EnumResolutions(pOutput, pmpd);
break;
default:
Error(("Unknown device capability: %d\n", wCapability));
result = GDI_ERROR;
break;
}
UnloadMpdFile(pmpd);
return result;
}