[sane-devel] saned/network scanner

[Thiago Milczarek Sayão]

Alexander,
Took a peek on the sane sources and managed to get it working, with your
guide.

Some observations:
1 - I have limited it to work with 1 Frame only. Would be nice to have an
API where sane manages multi-frame situations;
2 - Sane is very easy, the difficult part is to convert the received bytes
onto an image. Would also be nice to convert the code on scanimage.c to an
API call;

Note:
I got it working with the Ricoh driver, will try to connect with an apple
device and wireshark it

Thanks.


Em sáb., 23 de jan. de 2021 às 05:45, Alexander Pevzner <pzz at apevzner.com>
escreveu:

> On 1/22/21 11:43 PM, Thiago Milczarek Sayão wrote:
> > Thanks for the reply.
> >
> > Another approach is to use the C api directly and map it to java using
> JNI.
> >
> > I'm looking at scanimage.c file, but it deals with lots of things. Is
> > there a high level api?
>
> I's actually simple.
>
> 1. Call sane_init() to initialize the driver
> 2. Call sane_get_devices() to obtain list of devices
> 3. Somehow choose a device from the list
> 4. Call sane_open() to obtain device handle
> 5. Call sane_start() to start scanning
> 6. Call sane_get_parameters() to obtain image parameters
> 7. Call sane_read() to read image data, until it returns erroneous
> status or zero length (which means EOF)
> 8. Call sane_close() to release device handle
> 9. Call sane_exit() to cleanup the driver
>
> Items 2-7 can be repeated without need to initialize/cleanup driver
> before/after each scan.
>
> Any of these functions may return error status code.
>
> To scan everything from ADF, you need to repeat steps 5-7, until
> sane_start() returns SANE_STATUS_NO_DOCS. Don't consider
> SANE_STATUS_NO_DOCS as an error, if you've got at least one image.
>
> It will scan with default options.
>
> Once you've get it working, I can tell you how to deal with options.
>
> --
>
>         Wishes, Alexander Pevzner (pzz at apevzner.com)
>
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