Bug#788048: cups-filters: please request the generic monospace font alias from fontconfig instead of the hard-coded FreeMono

[Fabian Greffrath <fabian@debian.org>]

Package: cups-filters
Version: 1.0.68-1
Severity: normal
Tags: patch

Hi again,

cups-filters uses fontconfig to find a suitable monospaced font for
rendering text to pdf. However, this font is currently hard-coded to
FreeMono. This means, that if the FreeMono font package is installed, users
have no chance to change the font used for text rendering by means of
fontconfig rules anymore. FreeMono will *always* be preferred, there
is no choice.

By changing the hard-coded request for FreeMono to the generic
"monospace" alias, fontconfig returns the next best suitable monospaced font
that is available on the system. This might be FreeMono or any other
font. The actual preference of fonts, however, can be configured
per-system by means of fontconfig configuration files, which is the true
advantage of this approach.

The attached patch does exact this. Please consider applying it.

Thanks,

Fabian


-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'experimental'), (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages cups-filters depends on:
ii  bc                         1.06.95-9
ii  cups-filters-core-drivers  1.0.68-1
ii  ghostscript                9.06~dfsg-2
ii  libc6                      2.19-18
ii  libcups2                   1.7.5-11
ii  libcupsfilters1            1.0.68-1
ii  libcupsimage2              1.7.5-11
ii  libfontconfig1             2.11.0-6.3
ii  libfontembed1              1.0.68-1
ii  libgcc1                    1:5.1.1-7
ii  libijs-0.35                0.35-10
ii  liblcms2-2                 2.6-3+b3
ii  libpoppler46               0.26.5-2
ii  libqpdf13                  5.1.2-2
ii  libstdc++6                 5.1.1-7

Versions of packages cups-filters recommends:
ii  colord  1.2.1-1+b2

Versions of packages cups-filters suggests:
ii  foomatic-db-compressed-ppds [foomatic-db]  20150411-1

-- no debconf information

diff --git a/pdf.utf-8~monospace b/pdf.utf-8
index 1280f25..c1c3d68 100644
--- a/pdf.utf-8~monospace
+++ b/pdf.utf-8
@@ -28,5 +28,5 @@ charset utf8
 # printing.
 #
 
-0000 04FF ltor single monospace monospace:bold monospace:oblique monospace:bold:oblique
-0500 05FF rtol single monospace
+0000 04FF ltor single FreeMono FreeMono:bold FreeMono:oblique FreeMono:bold:oblique
+0500 05FF rtol single FreeMono