conf.d/10-scale-bitmap-fonts.conf

   1 <?xml version="1.0"?>
   2 <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
   3 <fontconfig>
   4   <its:rules xmlns:its="http://www.w3.org/2005/11/its" version="1.0">
   5     <its:translateRule translate="no" selector="/fontconfig/*[not(self::description)]"/>
   6   </its:rules>
   7
   8   <description>Bitmap scaling</description>
   9 <!--
  10   If font is bitmap, calculate scale factor.
  11   Note that color bitmap fonts have scalable=true, while
  12   non-color ones have scalable=false.  Both groups have outline=false.
  13   -->
  14 <match target="font">
  15   <test name="outline" compare="eq">
  16     <bool>false</bool>
  17   </test>
  18   <edit name="pixelsizefixupfactor" mode="assign">
  19     <divide>
  20       <name target="pattern">pixelsize</name>
  21       <name target="font"   >pixelsize</name>
  22     </divide>
  23   </edit>
  24 </match>
  25 <!--
  26   For non-scalable bitmap fonts (ie. non-color), skip
  27   minor scaling if hinting is enabled.
  28   -->
  29 <match target="font">
  30   <test name="outline" compare="eq">
  31     <bool>false</bool>
  32   </test>
  33   <test name="scalable" compare="eq">
  34     <bool>false</bool>
  35   </test>
  36   <test name="hinting" compare="eq">
  37     <bool>true</bool>
  38   </test>
  39   <edit name="scalingnotneeded" mode="assign">
  40     <and>
  41       <less>
  42         <name>pixelsizefixupfactor</name>
  43         <double>1.2</double>
  44       </less>
  45       <more>
  46         <name>pixelsizefixupfactor</name>
  47         <double>0.8</double>
  48       </more>
  49     </and>
  50   </edit>
  51 </match>
  52 <match target="font">
  53   <test name="scalingnotneeded" compare="eq">
  54     <bool>true</bool>
  55   </test>
  56   <edit name="pixelsizefixupfactor" mode="assign">
  57     <double>1.0</double>
  58   </edit>
  59 </match>
  60 <!--
  61   If we *are* going to scale, go ahead and do it.
  62   -->
  63 <match target="font">
  64   <test name="outline" compare="eq">
  65     <bool>false</bool>
  66   </test>
  67   <test name="pixelsizefixupfactor" compare="not_eq">
  68     <double>1.0</double>
  69   </test>
  70   <edit name="matrix" mode="assign">
  71     <times>
  72       <name>matrix</name>
  73       <matrix>
  74         <name>pixelsizefixupfactor</name> <double>0</double>
  75         <double>0</double> <name>pixelsizefixupfactor</name>
  76        </matrix>
  77     </times>
  78   </edit>
  79   <edit name="size" mode="assign">
  80     <divide>
  81       <name>size</name>
  82       <name>pixelsizefixupfactor</name>
  83     </divide>
  84   </edit>
  85 </match>
  86
  87 </fontconfig>