[sane-devel] sane-backends-1.0.22: Lide210 bumps into bottom

[Peter Hackenberg]

Hi all,

To get my new Canon Lide 210 working I compiled sane-backends-1.0.22
from the sources.

At the end of the scan (with xsane 0.997 on Debian Squeeze) the scanner
bumbs into a hard stop. The following patch fixes this:

--- genesys_devices_orig.c	2011-01-21 01:26:47.000000000 +0100
+++ genesys_devices.c	2012-03-20 22:06:44.076961530 +0100
@@ -1358,28 +1358,28 @@
 static Genesys_Model canon_lide_210_model = {
   "canon-lide-210",		/* Name */
   "Canon",			/* Device vendor string */
   "LiDE 210",			/* Device model name */
   GENESYS_GL124,
   NULL,
 
   {/*2400, */ 1200, 600, /* 400,*/ 300, 150, 100, 75, 0},	/* possible x-resolutions */
   {/*2400, */ 1200, 600, /* 400,*/ 300, 150, 100, 75, 0},	/* possible y-resolutions */
   {16, 8, 0},			/* possible depths in gray mode */
   {16, 8, 0},			/* possible depths in color mode */
 
-  SANE_FIX (3.6),		/* Start of scan area in mm (x) */
-  SANE_FIX (8.5),		/* Start of scan area in mm (y) */
-  SANE_FIX (213.80),		/* Size of scan area in mm (x) */
-  SANE_FIX (300.0),		/* Size of scan area in mm (y) */
+  SANE_FIX (1.9),		/* Start of scan area in mm (x) */
+  SANE_FIX (7.9),		/* Start of scan area in mm (y) */
+  SANE_FIX (217.0),		/* Size of scan area in mm (x) */
+  SANE_FIX (298.0),		/* Size of scan area in mm (y) */
 
   SANE_FIX (0.0),		/* Start of white strip in mm (y) */
   SANE_FIX (0.0),		/* Start of black mark in mm (x) */
 
   SANE_FIX (0.0),		/* Start of scan area in TA mode in mm (x) */
   SANE_FIX (0.0),		/* Start of scan area in TA mode in mm (y) */
   SANE_FIX (100.0),		/* Size of scan area in TA mode in mm (x) */
   SANE_FIX (100.0),		/* Size of scan area in TA mode in mm (y) */
 
   SANE_FIX (0.0),		/* Start of white strip in TA mode in mm (y) */
 
   SANE_FIX (0.0),		/* Size of scan area after paper sensor stops



Two remarks on the numbers:
The excact reference corner is (with my scanner) at x = 1.7 and y = 7.7.
The sum of x-corner and x-width must not exceed 218.9, otherwise the
scanned picture gets garbled due to too less pixels per line retured.



One peculiarity observed. As soon as enhancement options are enabled in
xsane (like software deskew or software crop in the extended options
window) the scanner stops at the bottom and does not return to the start
position. Well, with the next scan, it first returns to the start
position. Any ideas on that?



Did anybody find out how to make e.g. "A4" the default size in the xsane
preview pane? But maybe my xsane is simply too old (0.997).


Best regards,
Peter