setfonts.py

#!/usr/bin/env python
# converts gconf /desktop/gnome/font_rendering to fonts.conf
# usage setfonts.py > ~/.fonts.conf

# http://www.cyberciti.biz/faq/gnome-linux-firefox-smooth-fonts/
# https://wiki.archlinux.org/index.php/Font_Configuration

# mappings (http://freedesktop.org/wiki/ScreenFontSettings)
# gconf -> fontconfig
# /desktop/gnome/font_rendering/antialiasing ->
#   none -> false
#   grayscale -> true, rgba -> none
#   rgba -> true, rgba -> (value in rgba_order)
# /desktop/gnome/font_rendering/hinting -> hintstyle
#   none -> hintnone
#   slight -> hintslight
#   medium -> hintmedium
#   full -> hintfull
# /desktop/gnome/font_rendering/rgba_order -> rgba
#   rgb -> rgb
#   bgr -> bgr
#   vrgb -> vrgb
#   vbgr -> vbgr
#   (if /antialising = grayscale) -> none

import gconf

# abbreviations in code:
# g -> gconf
# fc -> fontconfig
g = gconf.client_get_default()
def gen_header():
    return """<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>"""

def gen_footer():
    return "</fontconfig>"

def convert_hintstyle():
    try:
        g_hintstyle =  g.get("/desktop/gnome/font_rendering/hinting").get_string()
    except AttributeError:
        return ""
    fc_hintstyle = "hint"+g_hintstyle
    return """<match target="font" >
  <edit mode="assign" name="hintstyle" >
    <const>"""+fc_hintstyle+"""</const>
  </edit>
</match>"""

def convert_rgbamode():
    try:
        g_antialias = g.get("/desktop/gnome/font_rendering/antialiasing").get_string()
    except AttributeError:
        return ""
    fc_rgbamode = None
    if (g_antialias == "grayscale"):
        fc_rgbamode = "none"
    if (g_antialias == "rgba"):
        try:
            g_rgbamode = g.get("/desktop/gnome/font_rendering/rgba_order").get_string()
            fc_rgbamode = g_rgbamode
        except AttributeError:
            fc_rgbamode = "rgb"
    if fc_rgbamode is not None:
        return """<match target="font" >
  <edit mode="assign" name="rgba" >
    <const>"""+fc_rgbamode+"""</const>
  </edit>
</match>"""
    else:
        return ""

def convert_hinting():
    try:
        g_hintstyle =  g.get("/desktop/gnome/font_rendering/hinting").get_string()
    except AttributeError:
        return ""
    fc_hinting = "false"
    if (g_hintstyle != "none"):
        fc_hinting = "true"
    return """<match target="font" >
  <edit mode="assign" name="hinting" >
    <bool>"""+fc_hinting+"""</bool>
  </edit>
</match>"""

def convert_antialias():
    try:
        g_antialias = g.get("/desktop/gnome/font_rendering/antialiasing").get_string()
    except AttributeError:
        return ""
    fc_antialias = "false"
    if (g_antialias != "none"):
        fc_antialias = "true"
    return """<match target="font" >
  <edit mode="assign" name="antialias" >
    <bool>"""+fc_antialias+"""</bool>
  </edit>
</match>"""

# force disable autohinter if subpixel rendering is enabled (ie rgba != none)
# leave unchanged otherwise
def convert_autohint():
    g_antialias = g.get("/desktop/gnome/font_rendering/antialiasing").get_string()
    if (g_antialias == "rgba"):
        return """<match target="font" >
  <edit mode="assign" name="autohint" >
    <bool>false</bool>
  </edit>
</match>"""
    else:
        return ""

print gen_header()
print convert_rgbamode()
print convert_hinting()
print convert_hintstyle()
print convert_antialias()
#print convert_autohint()  # msttcorefonts might look better with autohint true, so dont touch
print gen_footer()