Reply To: Question About ICAP_UNITS

[torinford]

Hard to say if it is correct or not. I have to think my code is correct because the first two values I get back are 800 and 600, and both of these are available in the data source’s UI. The following is the code where I’m enumerating the ICAP_YRESOLUTION values.

TW_CAPABILITY twCapability;

memset(&twCapability, 0, sizeof(twCapability));

twCapability.Cap = ICAP_YRESOLUTION;

twCapability.ConType = TWON_ENUMERATION;



if ((Status = m_Twain.GetCapability(&twCapability)) != STATUS_SUCCESS)

{

return Status;

}



double dLargest = 0.0;

pTW_ENUMERATION pEnum = reinterpret_cast(::GlobalLock(twCapability.hContainer));

if (pEnum->ItemType != TWTY_FIX32)

{

::GlobalUnlock(twCapability.hContainer);

throw STATUS_NSTWAIN_UNSUPPORTED_DATA_TYPE;

}

else

{

double dTemp = 0.0;

pTW_FIX32 pFixResolution = reinterpret_cast(pEnum->ItemList);

TW_FIX32 FixResolution = { 0 };

TW_UINT32 uiItemCounter = 0;

for (uiItemCounter = 0; uiItemCounter < pEnum->NumItems; uiItemCounter++, pFixResolution++)

{

FixResolution = (*pFixResolution);



dTemp = static_cast(FixResolution.Whole) + (static_cast(FixResolution.Frac) / 65536.0);

if (dTemp > dLargest)

{

dLargest = dTemp;

}

}

}

::GlobalUnlock(twCapability.hContainer);

Due note, the negative and tiny values are seen in the FixResolution structure long before I do the conversion in to dTemp.

Thanks,

Torin