[sane-devel] sane under windows XP / 7

[Chris Bagwell]

On Tue, Sep 4, 2012 at 10:33 AM, Matteo Gasparin
<email.diversa at gmail.com> wrote:
> I'm trying to write a multi platform scanning utility using SANE but, while
> everything with linux is fine, opening the device and all, I find issues
> with windows, both xp 32 and 7 64 bit. I downloaded the source and compiled
> it using cygwin and the libusb-win32 library and everything went fine; some
> of the backends didn't build:
>
> *** canon_pp backend requires libieee1284 library - disabling
> *** gphoto2 backend requires gphoto2 and JPEG libraries - disabling
> *** hpsj5s backend requires libieee1284 library - disabling
> *** mustek_pp backend requires libieee1284 and paraport-directio libraries -
> disabling
> *** mustek_usb2 backend requires pthread library - disabling
> *** pint backend requires sys/scanio.h - disabling
> *** qcam backend requires ioperm and portaccess functions - disabling
> *** v4l backend requires v4l libraries - disabling
> *** pnm backend not manually selected - disabling
>
> which is ok for me, since the scanner I'm trying to reach is a HP Scanjet
> 5300C, which should use the avisio backend. I thought it could be a USB
> driver issue so I used libwdi's zadig program to switch the normal xp driver
> with the libusb-win32 one. After that sane-find-scanner could correctly
> recognize the scanner but no luck using scanimage.
>
> Did I do something wrong? Did I miss something?

Hopefully, others with mingw32 experience will jump in as well.  But
to start, what version of sane-backends are you testing with?

I occasionally test cross compiling sane-backends on Fedora using
ming32 cross compiler and then I test the executable using wine with a
networked Epson scanner.  I compile with "configure BACKENDS=epson2"
so I don't get much visibility into other backends.  I have no
experience testing USB support under mingw32 though.

I believe avision is the only other backend that has much mingw32
testing by other users.  I thought there has been successful USB
access using libusb-win32 though.

Your probably going to have to start debugging to get much further.
You can try the SANE_DEBUG_SANEI_USB and SANEI_DEBUG_AVISION
environment variables and see if you can spot were things are going
wrong between Linux and Windows.

> On top of that I'm using Java and JNA to interface with SANE; again
> everything using linux is fine, while with windows it correctly loads the
> library and then hangs at the first call of sane_init(null, null) . Someone
> got an idea about that?

Hmm, not sure. I recall having some odd issues with finding config
files on windows.  I think you may have to change into scanimage
install directory before running your app or set the SANE_CONFIG_DIR
environment variable.

That type of failures shouldn't cause hang ups but you never know.

Chris