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|
{ config, lib, pkgs, ... }:
with lib;
{
options = {
fonts = {
fontconfig = {
enable = mkOption {
type = types.bool;
default = true;
description = ''
If enabled, a Fontconfig configuration file will be built
pointing to a set of default fonts. If you don't care about
running X11 applications or any other program that uses
Fontconfig, you can turn this option off and prevent a
dependency on all those fonts.
'';
};
antialias = mkOption {
type = types.bool;
default = true;
description = "Enable font antialiasing.";
};
dpi = mkOption {
type = types.int;
default = 0;
description = ''
Force DPI setting. Setting to <literal>0</literal> disables DPI
forcing; the DPI detected for the display will be used.
'';
};
defaultFonts = {
monospace = mkOption {
type = types.listOf types.str;
default = ["DejaVu Sans Mono"];
description = ''
System-wide default monospace font(s). Multiple fonts may be
listed in case multiple languages must be supported.
'';
};
sansSerif = mkOption {
type = types.listOf types.str;
default = ["DejaVu Sans"];
description = ''
System-wide default sans serif font(s). Multiple fonts may be
listed in case multiple languages must be supported.
'';
};
serif = mkOption {
type = types.listOf types.str;
default = ["DejaVu Serif"];
description = ''
System-wide default serif font(s). Multiple fonts may be listed
in case multiple languages must be supported.
'';
};
};
hinting = {
enable = mkOption {
type = types.bool;
default = true;
description = "Enable TrueType hinting.";
};
autohint = mkOption {
type = types.bool;
default = true;
description = ''
Enable the autohinter, which provides hinting for otherwise
un-hinted fonts. The results are usually lower quality than
correctly-hinted fonts.
'';
};
style = mkOption {
type = types.str // {
check = flip elem ["none" "slight" "medium" "full"];
};
default = "full";
description = ''
TrueType hinting style, one of <literal>none</literal>,
<literal>slight</literal>, <literal>medium</literal>, or
<literal>full</literal>.
'';
};
};
includeUserConf = mkOption {
type = types.bool;
default = true;
description = ''
Include the user configuration from
<filename>~/.config/fontconfig/fonts.conf</filename> or
<filename>~/.config/fontconfig/conf.d</filename>.
'';
};
subpixel = {
rgba = mkOption {
default = "rgb";
type = types.enum ["rgb" "bgr" "vrgb" "vbgr" "none"];
description = ''
Subpixel order, one of <literal>none</literal>,
<literal>rgb</literal>, <literal>bgr</literal>,
<literal>vrgb</literal>, or <literal>vbgr</literal>.
'';
};
lcdfilter = mkOption {
default = "default";
type = types.enum ["none" "default" "light" "legacy"];
description = ''
FreeType LCD filter, one of <literal>none</literal>,
<literal>default</literal>, <literal>light</literal>, or
<literal>legacy</literal>.
'';
};
};
};
};
};
config =
let fontconfig = config.fonts.fontconfig;
fcBool = x: "<bool>" + (if x then "true" else "false") + "</bool>";
renderConf = ''
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<!-- Default rendering settings -->
<match target="font">
<edit mode="assign" name="hinting">
${fcBool fontconfig.hinting.enable}
</edit>
<edit mode="assign" name="autohint">
${fcBool fontconfig.hinting.autohint}
</edit>
<edit mode="assign" name="hintstyle">
<const>hint${fontconfig.hinting.style}</const>
</edit>
<edit mode="assign" name="antialias">
${fcBool fontconfig.antialias}
</edit>
<edit mode="assign" name="rgba">
<const>${fontconfig.subpixel.rgba}</const>
</edit>
<edit mode="assign" name="lcdfilter">
<const>lcd${fontconfig.subpixel.lcdfilter}</const>
</edit>
</match>
${optionalString (fontconfig.dpi != 0) ''
<match target="pattern">
<edit name="dpi" mode="assign">
<double>${toString fontconfig.dpi}</double>
</edit>
</match>
''}
</fontconfig>
'';
genericAliasConf = ''
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<!-- Default fonts -->
${optionalString (fontconfig.defaultFonts.sansSerif != []) ''
<alias>
<family>sans-serif</family>
<prefer>
${concatStringsSep "\n"
(map (font: "<family>${font}</family>")
fontconfig.defaultFonts.sansSerif)}
</prefer>
</alias>
''}
${optionalString (fontconfig.defaultFonts.serif != []) ''
<alias>
<family>serif</family>
<prefer>
${concatStringsSep "\n"
(map (font: "<family>${font}</family>")
fontconfig.defaultFonts.serif)}
</prefer>
</alias>
''}
${optionalString (fontconfig.defaultFonts.monospace != []) ''
<alias>
<family>monospace</family>
<prefer>
${concatStringsSep "\n"
(map (font: "<family>${font}</family>")
fontconfig.defaultFonts.monospace)}
</prefer>
</alias>
''}
</fontconfig>
'';
in mkIf fontconfig.enable {
# Fontconfig 2.10 backward compatibility
# Bring in the default (upstream) fontconfig configuration, only for fontconfig 2.10
environment.etc."fonts/fonts.conf".source =
pkgs.makeFontsConf { fontconfig = pkgs.fontconfig_210; fontDirectories = config.fonts.fonts; };
environment.etc."fonts/conf.d/10-nixos-rendering.conf".text = renderConf;
environment.etc."fonts/conf.d/60-nixos-generic-alias.conf".text = genericAliasConf;
# Versioned fontconfig > 2.10. Take shared fonts.conf from fontconfig.
# Otherwise specify only font directories.
environment.etc."fonts/${pkgs.fontconfig.configVersion}/fonts.conf".source =
"${pkgs.fontconfig}/etc/fonts/fonts.conf";
environment.etc."fonts/${pkgs.fontconfig.configVersion}/conf.d/00-nixos.conf".text =
''
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<!-- Font directories -->
${concatStringsSep "\n" (map (font: "<dir>${font}</dir>") config.fonts.fonts)}
</fontconfig>
'';
environment.etc."fonts/${pkgs.fontconfig.configVersion}/conf.d/10-nixos-rendering.conf".text = renderConf;
environment.etc."fonts/${pkgs.fontconfig.configVersion}/conf.d/60-nixos-generic-alias.conf".text = genericAliasConf;
environment.etc."fonts/${pkgs.fontconfig.configVersion}/conf.d/99-user.conf" = {
enable = fontconfig.includeUserConf;
text = ''
<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<include ignore_missing="yes" prefix="xdg">fontconfig/conf.d</include>
<include ignore_missing="yes" prefix="xdg">fontconfig/fonts.conf</include>
</fontconfig>
'';
};
environment.systemPackages = [ pkgs.fontconfig ];
};
}
|