[sane-devel] how do I use scanner hardware sensors (e.g. scan button)?

[Arthur Hebert]

Thanks again for the quick reply.

I'm answering one of my questions here for the sake of the list archives:

On OS X, it appears the SANE headers and libraries are in

/usr/local/include/sane/
/usr/local/lib/sane/

and the SANE Mac SDK installs its files in

/usr/local/Developer/SDKs/
MacOSX10.5.sdk/usr/local/include/sane/
/usr/local/Developer/SDKs/MacOSX10.5.sdk/usr/local/lib/sane/

-Arthur



> On Tue, Jan 19, 2010 at 10:23 AM, m. allan noah <kitno455 at gmail.com>wrote:
>
>> On Tue, Jan 19, 2010 at 1:14 PM, Arthur Hebert <arthur at evcl.com> wrote:
>> > Thanks Allan. I am comfortable digging in and writing code, much more so
>> for
>> > scripting languages (e.g. bash, python) than compiled/linked languages
>> (e.g.
>> > C).
>> >
>> > A few related questions come to mind:
>> >
>> > * Is scanimage considered a frontend or a backend?
>>
>> frontend
>>
>> >
>> > * How do I read/poll the scan-button hardware state from the device?
>> (Note:
>> > scanimage --help | grep "\-\-scan" results in "no" even when I hold down
>> the
>> > button)
>>
>> you would have to write your own frontend, or modify the button daemon
>> in our old experimental tree. I don't think you can do it with
>> scanimage.
>>
>> > * How do I invoke the fujitsu backend by itself (e.g. to see hardware
>> > states, and to make use of JPEG output)?
>>
>> the backend is not a program. you cannot 'run' it. it is a library,
>> which is 'ingested' by some other frontend program. the frontend then
>> calls functions that are provided by this backend.
>>
>> > * I installed the SDK from the download page on my OS X 10.5. My system
>> > developer tools are installed. Where did the SDK install the source
>> code?
>> > How do I build from it?
>>
>> I know nothing about this sdk, as it is not provided by us. Perhaps
>> Mattias can give some help on the OSX specific parts. For front-end
>> development, you only need to have some minimal sane header files
>> installed someplace like /usr/include or /usr/local/include. No need
>> to rebuild sane backends or sane frontends packages (yet).
>>
>> allan
>> --
>> "The truth is an offense, but not a sin"
>>
>
>
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