[sane-devel] xsane preview and scanning problem

[HoonKook Shim]

Hi to all. I am using PowerScanII of TriGem Corporation, a OEM product of Astra2400, a UMAX scanner. The only difference is the vendor and model name, therefore fully compatible with Umax scanner driver. There was no problem using the scanner on Windows platform using UMAX scanner drivers.. VistaScan.

Since the Sane doesn't support my scanner, I modified the sourcefile, 'umax-scanner.c' in backend directory, inserted "TriGem" and "PowerScanII" element to scanner_str[], and compiled it. And everything works fine. sane-find-scanner, scanimage, etc.

The problem is that scanning procedure freezes when I try to scan image after scanning preview image. Each procedure works fine, i.e. I can scan image without any problem if I do not use preview program-I mean when I scan whole area.. - and preview program works fine. But when I try to scan image after setting the scanning area in preview window, the scanner freezes and stops scanning. It looks like starting normally, but at the very point the scanner head starts to move, the blinking ready light goes off, and scanner freezes. It worked once, though, when the scanning area is not off the top edge. But when I set the scanning area off the top edge, the same thing occured. I'm suspecting it as a error occuring during cropping mechanism, or timing, something like that.

Xsane program seems like waiting for scanner to complete the scanning process, so I have to halt it manually. But since then I couldn't do anything with the scanner because the sane couldn't fine the scanner anymore. I think that's because of the blacked-out ready lamp.

So, what I wanna ask is two things..

1. How can I scan the image with the preview feature?

2. How can I set the scanner online again when it went offline?

Thanks in advace for your patience of reading my poor English.

 


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