How to set ICAP_XSCALING and ICAP_YSCALING

[leonardo-ferreira]

Hello,

I’m new to twain and I’m finding difficulties in setting the ICAP_XSCALING and ICAP_YSCALING capabilities. The code is:

========
TW_CAPABILITY cap;
TW_INT16 rc= TWRC_FAILURE;
pTW_ONEVALUE pv;

cap.Cap = scalCap; // capability id
cap.ConType = TWON_ONEVALUE; // container type
cap.hContainer = GlobalAlloc(GHND, sizeof(TW_ONEVALUE));

pv = (pTW_ONEVALUE)GlobalLock(cap.hContainer);
pv->ItemType = TWTY_FIX32;
pv->Item = 1.5;
GlobalUnlock(cap.hContainer);

rc = (*pDSM_Entry)(&AppId,
&SourceId,
DG_CONTROL,
DAT_CAPABILITY,
MSG_SET,
(TW_MEMREF)&cap);

GlobalFree(cap.hContainer);
return rc;
==========

This is a function that is being called at stage four, but the image is still being acquired without being rescaled. What am I doing wrong?

Thanks in advance,

Leonardo V. Ferreira

[gabe]

what rc is being returned?

.

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