[sane-devel] Frame Types

[m. allan noah]

On Tue, Feb 10, 2009 at 2:54 PM, Kåre Särs <kare.sars at kolumbus.fi> wrote:
> Hi,
>
> How common is it that backends return frame types SANE_FRAME_RED/GREEN/BLUE?
>
> At the moment libksane reserves memory for the whole returned image and in
> case the backend returns the colors separately they are assembled to "normal"
> RGB format before the image data is returned to the user. Now there is a need
> to return the data for large images in chunks in stead of the whole thing at
> once. So the question is: Is it worth the time to work around this by
> splitting up the selected area and scanning one part at a time or is these
> frames only used in very few exotic models?

Scanning in parts wont work with ADF machines. 14 backends contain
'SANE_FRAME_RED':

agfafocus
apple
artec
bh
microtek
microtek2
mustek
pie
pint
pnm
tamarack
teco1
test
umax

While rare, at least some of those machines are still in use
somewhere. You might just have to go into blocking mode for those
machines.

allan
-- 
"The truth is an offense, but not a sin"