292 lines
8.3 KiB
Nix
292 lines
8.3 KiB
Nix
{ config, pkgs, lib, ... }:
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with lib;
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let
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cfg = config.fonts.fontconfig;
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fcBool = x: "<bool>" + (boolToString x) + "</bool>";
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# back-supported fontconfig version and package
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# version is used for font cache generation
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supportVersion = "210";
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supportPkg = pkgs."fontconfig_${supportVersion}";
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# latest fontconfig version and package
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# version is used for configuration folder name, /etc/fonts/VERSION/
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# note: format differs from supportVersion and can not be used with makeCacheConf
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latestVersion = pkgs.fontconfig.configVersion;
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latestPkg = pkgs.fontconfig;
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# supported version fonts.conf
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supportFontsConf = pkgs.makeFontsConf { fontconfig = supportPkg; fontDirectories = config.fonts.fonts; };
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# configuration file to read fontconfig cache
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# version dependent
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# priority 0
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cacheConfSupport = makeCacheConf { version = supportVersion; };
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cacheConfLatest = makeCacheConf {};
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# generate the font cache setting file for a fontconfig version
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# use latest when no version is passed
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makeCacheConf = { version ? null }:
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let
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fcPackage = if version == null
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then "fontconfig"
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else "fontconfig_${version}";
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makeCache = fontconfig: pkgs.makeFontsCache { inherit fontconfig; fontDirectories = config.fonts.fonts; };
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cache = makeCache pkgs.${fcPackage};
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cache32 = makeCache pkgs.pkgsi686Linux.${fcPackage};
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in
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pkgs.writeText "fc-00-nixos-cache.conf" ''
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<?xml version='1.0'?>
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<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
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<fontconfig>
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<!-- Font directories -->
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${concatStringsSep "\n" (map (font: "<dir>${font}</dir>") config.fonts.fonts)}
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<!-- Pre-generated font caches -->
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<cachedir>${cache}</cachedir>
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${optionalString (pkgs.stdenv.isx86_64 && cfg.cache32Bit) ''
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<cachedir>${cache32}</cachedir>
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''}
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</fontconfig>
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'';
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# local configuration file
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localConf = pkgs.writeText "fc-local.conf" cfg.localConf;
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# rendering settings configuration files
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# priority 10
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hintingConf = pkgs.writeText "fc-10-hinting.conf" ''
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<?xml version='1.0'?>
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<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
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<fontconfig>
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<!-- Default rendering settings -->
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<match target="pattern">
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<edit mode="append" name="hinting">
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${fcBool cfg.hinting.enable}
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</edit>
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<edit mode="append" name="autohint">
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${fcBool cfg.hinting.autohint}
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</edit>
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<edit mode="append" name="hintstyle">
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<const>hintslight</const>
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</edit>
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</match>
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</fontconfig>
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'';
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antialiasConf = pkgs.writeText "fc-10-antialias.conf" ''
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<?xml version='1.0'?>
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<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
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<fontconfig>
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<!-- Default rendering settings -->
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<match target="pattern">
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<edit mode="append" name="antialias">
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${fcBool cfg.antialias}
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</edit>
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</match>
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</fontconfig>
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'';
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subpixelConf = pkgs.writeText "fc-10-subpixel.conf" ''
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<?xml version='1.0'?>
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<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
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<fontconfig>
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<!-- Default rendering settings -->
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<match target="pattern">
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<edit mode="append" name="rgba">
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<const>${cfg.subpixel.rgba}</const>
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</edit>
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<edit mode="append" name="lcdfilter">
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<const>lcd${cfg.subpixel.lcdfilter}</const>
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</edit>
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</match>
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</fontconfig>
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'';
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dpiConf = pkgs.writeText "fc-11-dpi.conf" ''
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<?xml version='1.0'?>
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<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
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<fontconfig>
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<match target="pattern">
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<edit name="dpi" mode="assign">
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<double>${toString cfg.dpi}</double>
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</edit>
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</match>
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</fontconfig>
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'';
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# default fonts configuration file
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# priority 52
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defaultFontsConf =
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let genDefault = fonts: name:
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optionalString (fonts != []) ''
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<alias>
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<family>${name}</family>
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<prefer>
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${concatStringsSep ""
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(map (font: ''
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<family>${font}</family>
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'') fonts)}
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</prefer>
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</alias>
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'';
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in
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pkgs.writeText "fc-52-nixos-default-fonts.conf" ''
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<?xml version='1.0'?>
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<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
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<fontconfig>
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<!-- Default fonts -->
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${genDefault cfg.defaultFonts.sansSerif "sans-serif"}
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${genDefault cfg.defaultFonts.serif "serif"}
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${genDefault cfg.defaultFonts.monospace "monospace"}
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</fontconfig>
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'';
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# reject Type 1 fonts
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# priority 53
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rejectType1 = pkgs.writeText "fc-53-nixos-reject-type1.conf" ''
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<?xml version="1.0"?>
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<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
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<fontconfig>
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<!-- Reject Type 1 fonts -->
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<selectfont>
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<rejectfont>
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<pattern>
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<patelt name="fontformat"><string>Type 1</string></patelt>
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</pattern>
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</rejectfont>
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</selectfont>
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</fontconfig>
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'';
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# The configuration to be included in /etc/font/
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penultimateConf = pkgs.runCommand "fontconfig-penultimate-conf" {
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preferLocalBuild = true;
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} ''
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support_folder=$out/etc/fonts/conf.d
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latest_folder=$out/etc/fonts/${latestVersion}/conf.d
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mkdir -p $support_folder
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mkdir -p $latest_folder
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# fonts.conf
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ln -s ${supportFontsConf} $support_folder/../fonts.conf
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ln -s ${latestPkg.out}/etc/fonts/fonts.conf \
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$latest_folder/../fonts.conf
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# fontconfig-penultimate various configuration files
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ln -s ${pkgs.fontconfig-penultimate}/etc/fonts/conf.d/*.conf \
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$support_folder
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ln -s ${pkgs.fontconfig-penultimate}/etc/fonts/conf.d/*.conf \
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$latest_folder
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ln -s ${cacheConfSupport} $support_folder/00-nixos-cache.conf
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ln -s ${cacheConfLatest} $latest_folder/00-nixos-cache.conf
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rm $support_folder/10-antialias.conf $latest_folder/10-antialias.conf
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ln -s ${antialiasConf} $support_folder/10-antialias.conf
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ln -s ${antialiasConf} $latest_folder/10-antialias.conf
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rm $support_folder/10-hinting.conf $latest_folder/10-hinting.conf
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ln -s ${hintingConf} $support_folder/10-hinting.conf
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ln -s ${hintingConf} $latest_folder/10-hinting.conf
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${optionalString cfg.useEmbeddedBitmaps ''
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rm $support_folder/10-no-embedded-bitmaps.conf
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rm $latest_folder/10-no-embedded-bitmaps.conf
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''}
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rm $support_folder/10-subpixel.conf $latest_folder/10-subpixel.conf
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ln -s ${subpixelConf} $support_folder/10-subpixel.conf
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ln -s ${subpixelConf} $latest_folder/10-subpixel.conf
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${optionalString (cfg.dpi != 0) ''
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ln -s ${dpiConf} $support_folder/11-dpi.conf
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ln -s ${dpiConf} $latest_folder/11-dpi.conf
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''}
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# 50-user.conf
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${optionalString (!cfg.includeUserConf) ''
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rm $support_folder/50-user.conf
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rm $latest_folder/50-user.conf
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''}
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# 51-local.conf
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rm $latest_folder/51-local.conf
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substitute \
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${pkgs.fontconfig-penultimate}/etc/fonts/conf.d/51-local.conf \
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$latest_folder/51-local.conf \
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--replace local.conf /etc/fonts/${latestVersion}/local.conf
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# local.conf (indirect priority 51)
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${optionalString (cfg.localConf != "") ''
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ln -s ${localConf} $support_folder/../local.conf
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ln -s ${localConf} $latest_folder/../local.conf
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''}
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# 52-nixos-default-fonts.conf
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ln -s ${defaultFontsConf} $support_folder/52-nixos-default-fonts.conf
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ln -s ${defaultFontsConf} $latest_folder/52-nixos-default-fonts.conf
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# 53-no-bitmaps.conf
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${optionalString cfg.allowBitmaps ''
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rm $support_folder/53-no-bitmaps.conf
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rm $latest_folder/53-no-bitmaps.conf
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''}
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${optionalString (!cfg.allowType1) ''
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# 53-nixos-reject-type1.conf
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ln -s ${rejectType1} $support_folder/53-nixos-reject-type1.conf
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ln -s ${rejectType1} $latest_folder/53-nixos-reject-type1.conf
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''}
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'';
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in
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{
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options = {
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fonts = {
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fontconfig = {
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penultimate = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable fontconfig-penultimate settings to supplement the
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NixOS defaults by providing per-font rendering defaults and
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metric aliases.
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'';
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};
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};
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};
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};
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};
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config = mkIf (config.fonts.fontconfig.enable && config.fonts.fontconfig.penultimate.enable) {
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fonts.fontconfig.confPackages = [ penultimateConf ];
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};
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}
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