document end detection fix

ChangeLog

@@ -1,3 +1,8 @@
+2012-03-20 Stéphane Voltz <stef.dev@free.fr>
+	* backend/genesys_*.[ch]: gl841 sheetfed scanners calibration
+	improvement, fix document end detection when doing dynamic lineart.
+	Copyrights updates.
+
 2012-03-19 Gerhard Jaeger <gerhard@gjaeger.de>
 	* backend/plustek.c: Fix batch scanning with Plustek backend
 	Patch submitted and tested by Elias Oltmanns <eo@nebensachen.de>

backend/genesys_gl841.c

@@ -3441,7 +3441,16 @@ gl841_detect_document_end (Genesys_Device * dev)
 
       /* the current scancnt is also the final one, so we use it to
        * compute total bytes to read. We also add the line count to eject document */
-      total_bytes_to_read=(scancnt+postcnt)*dev->wpl;
+      if (dev->settings.dynamic_lineart && dev->settings.scan_mode == SCAN_MODE_LINEART)
+        {
+          /* dynamic lineart case */
+          total_bytes_to_read=(scancnt+postcnt)*dev->wpl/8;
+        }
+      else
+        {
+          /* regular case */
+          total_bytes_to_read=(scancnt+postcnt)*dev->wpl;
+        }
       DBG (DBG_io, "%s: old total_bytes_to_read=%u\n",__FUNCTION__,dev->total_bytes_to_read);
       DBG (DBG_io, "%s: new total_bytes_to_read=%u\n",__FUNCTION__,total_bytes_to_read);