Potential fix for lineart scanning (bug #1076954).

Resolves: rhbz#1076954

hplip-lineart.patch

@@ -0,0 +1,14 @@
+diff -up hplip-3.14.6/scan.py.lineart hplip-3.14.6/scan.py
+--- hplip-3.14.6/scan.py.lineart	2014-07-23 12:30:52.361517852 +0100
++++ hplip-3.14.6/scan.py	2014-07-23 12:32:17.052940000 +0100
+@@ -977,8 +977,8 @@ try:
+                         try:
+                             pixels_per_line = bytes_per_line * 8          # Calculation of pixels_per_line for Lineart must be 8 time of bytes_per_line
+                                                                           # Otherwise, scanned image will be corrupted (slanted)
+-                            im = Image.frombuffer('RGBA', (pixels_per_line, lines), buffer.read(),
+-                                'raw', 'RGBA', 0, 1).convert('L')
++                            im = Image.frombuffer('1', (pixels_per_line, lines), buffer.read(),
++                                'raw', '1', 0, 1).convert('L')
+                         except ValueError:
+                             log.error("Did not read enough data from scanner (I/O Error?)")
+                             sys.exit(1)

hplip.spec

@@ -7,7 +7,7 @@
 Summary: HP Linux Imaging and Printing Project
 Name: hplip
 Version: 3.14.6
-Release: 5%{?dist}
+Release: 6%{?dist}
 License: GPLv2+ and MIT
 
 Url: http://hplip.sourceforge.net/
@@ -34,6 +34,7 @@ Patch17: hplip-codec.patch
 Patch18: hplip-log-stderr.patch
 Patch19: hplip-avahi-parsing.patch
 Patch20: hplip-reportlab.patch
+Patch21: hplip-lineart.patch
 
 %global hpijs_epoch 1
 Requires: hpijs%{?_isa} = %{hpijs_epoch}:%{version}-%{release}
@@ -252,6 +253,9 @@ done
 # reportlab (bug #1121433).
 %patch20 -p1 -b .reportlab
 
+# Potential fix for lineart scanning (bug #1076954).
+%patch21 -p1 -b .lineart
+
 sed -i.duplex-constraints \
     -e 's,\(UIConstraints.* \*Duplex\),//\1,' \
     prnt/drv/hpcups.drv.in
@@ -488,6 +492,9 @@ rm -f %{buildroot}%{_sysconfdir}/xdg/autostart/hplip-systray.desktop
 %postun libs -p /sbin/ldconfig
 
 %changelog
+* Wed Jul 23 2014 Tim Waugh <twaugh@redhat.com> - 3.14.6-6
+- Potential fix for lineart scanning (bug #1076954).
+
 * Mon Jul 21 2014 Tim Waugh <twaugh@redhat.com> - 3.14.6-5
 - Main package requires gnupg (bug #1118724).
 - Fixed version comparisons for x.y.z-style versions such as