[sane-devel] USB device locking in the snapscan backend

Oliver Schwartz wrote: Hi Oliver, > First off, the original code wasn't written by me and I don't claim I > fully understand it. The background, as far as I understand it, is > this: Oh yes, sorry I saw that after I wrote the mail, there were a number of maintainers over the years :) > The b

[sane-devel] USB device locking in the snapscan backend

Hi all, > The snapscan backend uses a mutex to lock the USB device it's > working with when sending "atomic" commands. First off, the original code wasn't written by me and I don't claim I fully understand it. The background, as far as I understand it, is this: The backend may fork a reader pr

[sane-devel] Plustek ST24 - genesys...

Le Monday 25 February 2008 16:02:27 Gernot Hassenpflug, vous avez ?crit?: > Hi! Is your code the one in he CVS sane-backends? Or is that someone > else's code (genesys_gl646.c)? I am trying to work with GL843 device > and wonder if I can use your code as a starting point... > > Regards, Gernot

[sane-devel] output of sane-find-scanner for Canoscan 8800F

On Mon, Feb 25, 2008 at 7:27 PM, Gernot Hassenpflug wrote: > On Mon, Feb 25, 2008 at 5:35 PM, Gernot Hassenpflug > wrote: > > Hello, I have submitted output for this scanner before, but do not see > > it on the SANE webpages, so here goes again. I will fiddle with the > > genesys backend to

[sane-devel] output of sane-find-scanner for Canoscan 8800F

On Mon, Feb 25, 2008 at 5:35 PM, Gernot Hassenpflug wrote: > Hello, I have submitted output for this scanner before, but do not see > it on the SANE webpages, so here goes again. I will fiddle with the > genesys backend to see what kind out output I can get, and maybe I can > help in the debugg

[sane-devel] USB device locking in the snapscan backend

"m. allan noah" wrote: Hi, > but would it not achieve the same effect? is the backend really > written with two different threads/processes which need to coordinate > access to the device? I don't know, only Oliver can answer that. JB. -- Julien BLACHE

[sane-devel] USB device locking in the snapscan backend

Mattias Ellert wrote: Hi, >> And there is the UsbCalls access method that needs to be fixed if it >> can be used along with IPC semaphores and I don't know anything about >> UsbCalls... > > Also MacOS X does not have any device files for USB devices. OS X uses pthread by default, hence it's not

[sane-devel] output of sane-find-scanner for Canoscan 8800F

Hello, I have submitted output for this scanner before, but do not see it on the SANE webpages, so here goes again. I will fiddle with the genesys backend to see what kind out output I can get, and maybe I can help in the debugging and development of the genesys code. Regards, Gernot Bus 001 Devi

[sane-devel] what is meaning of digital camera backend?

Hello all, I may be a bit thick, but having read the man pages for a couple of the sane-* device interfaces for digital cameras, I am still not understanding what SANE does when xscanimage is used to access the digitized data on a camera? Can someone enlighten me on this point please? Regards, Ge

[sane-devel] Plustek ST24 - genesys...

Le Monday 25 February 2008 07:58:49 Gerhard Jaeger, vous avez ?crit?: > Hi list, hi Pierre, > > I revived my Plustek ST24 device and tried to make it work > with the genesys backend. I managed to get out some picture, BUT: > > - any resolution != 150dpi results in a picture, that has double > the

[sane-devel] USB device locking in the snapscan backend

On Mon, Feb 25, 2008 at 4:08 PM, Julien BLACHE wrote: > Now, I really think it'd make more sense to have SANE entirely > decoupled from the frontend, so that the frontend would be relieved > from this kind of issues. > > Also some backends use/block signals (among other things), something >

[sane-devel] USB device locking in the snapscan backend

but would it not achieve the same effect? is the backend really written with two different threads/processes which need to coordinate access to the device? allan On Sun, Feb 24, 2008 at 12:43 PM, Julien BLACHE wrote: > "m. allan noah" wrote: > > Hi, > > > > it seems that on linux at least, if

[sane-devel] Colors and Calibration of a Genius ColorPage-Vivid 3XE

sorry, i dont know anything about the Grandtech/Sunplus chips or scanners that use them. that seems to be henning's specialty, but he is very busy lately. perhaps someone else will have some idea, or the data sheets for these machines,,, allan On Sun, Feb 24, 2008 at 4:02 PM, Renato wrote: > Hey

[sane-devel] Plustek ST24 - genesys...

Hi list, hi Pierre, I revived my Plustek ST24 device and tried to make it work with the genesys backend. I managed to get out some picture, BUT: - any resolution != 150dpi results in a picture, that has double the height of the original - the "focus" is not given, which means that it seems the