1266 lines
33 KiB
HTML
1266 lines
33 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
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<HTML
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><HEAD
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><TITLE
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>fonts-conf</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.79"></HEAD
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><BODY
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CLASS="REFENTRY"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><H1
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><A
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NAME="AEN1"
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></A
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>fonts-conf</H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN5"
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></A
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><H2
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>Name</H2
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>fonts.conf -- Font configuration files</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN8"
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></A
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><H2
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>Synopsis</H2
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><PRE
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CLASS="SYNOPSIS"
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> /etc/fonts/fonts.conf
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/etc/fonts/fonts.dtd
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/etc/fonts/conf.d
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~/.fonts.conf</PRE
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN10"
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></A
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><H2
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>Description</H2
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><P
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>Fontconfig is a library designed to provide system-wide font configuration,
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customization and application access.
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</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN13"
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></A
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><H2
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>Functional Overview</H2
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><P
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>Fontconfig contains two essential modules, the configuration module which
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builds an internal configuration from XML files and the matching module
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which accepts font patterns and returns the nearest matching font.
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</P
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN16"
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></A
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><H3
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>Font Configuration</H3
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><P
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>The configuration module consists of the FcConfig datatype, libexpat and
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FcConfigParse which walks over an XML tree and amends a configuration with
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data found within. From an external perspective, configuration of the
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library consists of generating a valid XML tree and feeding that to
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FcConfigParse. The only other mechanism provided to applications for
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changing the running configuration is to add fonts and directories to the
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list of application-provided font files.
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</P
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><P
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>The intent is to make font configurations relatively static, and shared by
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as many applications as possible. It is hoped that this will lead to more
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stable font selection when passing names from one application to another.
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XML was chosen as a configuration file format because it provides a format
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which is easy for external agents to edit while retaining the correct
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structure and syntax.
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</P
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><P
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>Font configuration is separate from font matching; applications needing to
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do their own matching can access the available fonts from the library and
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perform private matching. The intent is to permit applications to pick and
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choose appropriate functionality from the library instead of forcing them to
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choose between this library and a private configuration mechanism. The hope
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is that this will ensure that configuration of fonts for all applications
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can be centralized in one place. Centralizing font configuration will
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simplify and regularize font installation and customization.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN21"
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></A
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><H3
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>Font Properties</H3
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><P
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>While font patterns may contain essentially any properties, there are some
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well known properties with associated types. Fontconfig uses some of these
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properties for font matching and font completion. Others are provided as a
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convenience for the applications' rendering mechanism.
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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> Property Type Description
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--------------------------------------------------------------
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family String Font family names
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familylang String Languages corresponding to each family
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style String Font style. Overrides weight and slant
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stylelang String Languages corresponding to each style
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fullname String Font full names (often includes style)
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fullnamelang String Languages corresponding to each fullname
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slant Int Italic, oblique or roman
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weight Int Light, medium, demibold, bold or black
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size Double Point size
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width Int Condensed, normal or expanded
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aspect Double Stretches glyphs horizontally before hinting
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pixelsize Double Pixel size
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spacing Int Proportional, dual-width, monospace or charcell
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foundry String Font foundry name
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antialias Bool Whether glyphs can be antialiased
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hinting Bool Whether the rasterizer should use hinting
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hintstyle Int Automatic hinting style
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verticallayout Bool Use vertical layout
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autohint Bool Use autohinter instead of normal hinter
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globaladvance Bool Use font global advance data
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file String The filename holding the font
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index Int The index of the font within the file
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ftface FT_Face Use the specified FreeType face object
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rasterizer String Which rasterizer is in use
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outline Bool Whether the glyphs are outlines
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scalable Bool Whether glyphs can be scaled
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scale Double Scale factor for point->pixel conversions
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dpi Double Target dots per inch
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rgba Int unknown, rgb, bgr, vrgb, vbgr,
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none - subpixel geometry
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minspace Bool Eliminate leading from line spacing
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charset CharSet Unicode chars encoded by the font
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lang String List of RFC-3066-style languages this
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font supports
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fontversion Int Version number of the font
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capability String List of layout capabilities in the font
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embolden Bool Rasterizer should synthetically embolden the font
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</PRE
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></DIV
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN25"
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></A
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><H3
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>Font Matching</H3
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><P
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>Fontconfig performs matching by measuring the distance from a provided
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pattern to all of the available fonts in the system. The closest matching
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font is selected. This ensures that a font will always be returned, but
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doesn't ensure that it is anything like the requested pattern.
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</P
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><P
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>
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Font matching starts with an application constructed pattern. The desired
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attributes of the resulting font are collected together in a pattern. Each
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property of the pattern can contain one or more values; these are listed in
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priority order; matches earlier in the list are considered "closer" than
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matches later in the list.
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</P
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><P
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>The initial pattern is modified by applying the list of editing instructions
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specific to patterns found in the configuration; each consists of a match
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predicate and a set of editing operations. They are executed in the order
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they appeared in the configuration. Each match causes the associated
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sequence of editing operations to be applied.
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</P
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><P
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>After the pattern has been edited, a sequence of default substitutions are
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performed to canonicalize the set of available properties; this avoids the
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need for the lower layers to constantly provide default values for various
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font properties during rendering.
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</P
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><P
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>The canonical font pattern is finally matched against all available fonts.
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The distance from the pattern to the font is measured for each of several
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properties: foundry, charset, family, lang, spacing, pixelsize, style,
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slant, weight, antialias, rasterizer and outline. This list is in priority
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order -- results of comparing earlier elements of this list weigh more
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heavily than later elements.
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</P
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><P
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>There is one special case to this rule; family names are split into two
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bindings; strong and weak. Strong family names are given greater precedence
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in the match than lang elements while weak family names are given lower
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precedence than lang elements. This permits the document language to drive
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font selection when any document specified font is unavailable.
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</P
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><P
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>The pattern representing that font is augmented to include any properties
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found in the pattern but not found in the font itself; this permits the
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application to pass rendering instructions or any other data through the
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matching system. Finally, the list of editing instructions specific to
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fonts found in the configuration are applied to the pattern. This modified
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pattern is returned to the application.
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</P
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><P
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>The return value contains sufficient information to locate and rasterize the
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font, including the file name, pixel size and other rendering data. As
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none of the information involved pertains to the FreeType library,
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applications are free to use any rasterization engine or even to take
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the identified font file and access it directly.
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</P
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><P
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>The match/edit sequences in the configuration are performed in two passes
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because there are essentially two different operations necessary -- the
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first is to modify how fonts are selected; aliasing families and adding
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suitable defaults. The second is to modify how the selected fonts are
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rasterized. Those must apply to the selected font, not the original pattern
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as false matches will often occur.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN36"
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></A
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><H3
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>Font Names</H3
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><P
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>Fontconfig provides a textual representation for patterns that the library
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can both accept and generate. The representation is in three parts, first a
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list of family names, second a list of point sizes and finally a list of
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additional properties:
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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> <families>-<point sizes>:<name1>=<values1>:<name2>=<values2>...
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</PRE
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><P
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>Values in a list are separated with commas. The name needn't include either
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families or point sizes; they can be elided. In addition, there are
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symbolic constants that simultaneously indicate both a name and a value.
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Here are some examples:
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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> Name Meaning
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----------------------------------------------------------
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Times-12 12 point Times Roman
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Times-12:bold 12 point Times Bold
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Courier:italic Courier Italic in the default size
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Monospace:matrix=1 .1 0 1 The users preferred monospace font
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with artificial obliquing
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</PRE
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><P
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>The '\', '-', ':' and ',' characters in family names must be preceeded by a
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'\' character to avoid having them misinterpreted. Similarly, values
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containing '\', '=', '_', ':' and ',' must also have them preceeded by a
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'\' character. The '\' characters are stripped out of the family name and
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values as the font name is read.
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</P
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN43"
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></A
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><H2
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>Debugging Applications</H2
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><P
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>To help diagnose font and applications problems, fontconfig is built with a
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large amount of internal debugging left enabled. It is controlled by means
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of the FC_DEBUG environment variable. The value of this variable is
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interpreted as a number, and each bit within that value controls different
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debugging messages.
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</P
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><PRE
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CLASS="PROGRAMLISTING"
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> Name Value Meaning
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---------------------------------------------------------
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MATCH 1 Brief information about font matching
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MATCHV 2 Extensive font matching information
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EDIT 4 Monitor match/test/edit execution
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FONTSET 8 Track loading of font information at startup
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CACHE 16 Watch cache files being written
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CACHEV 32 Extensive cache file writing information
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PARSE 64 (no longer in use)
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SCAN 128 Watch font files being scanned to build caches
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SCANV 256 Verbose font file scanning information
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MEMORY 512 Monitor fontconfig memory usage
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CONFIG 1024 Monitor which config files are loaded
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LANGSET 2048 Dump char sets used to construct lang values
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OBJTYPES 4096 Display message when value typechecks fail
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</PRE
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><P
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>Add the value of the desired debug levels together and assign that (in
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base 10) to the FC_DEBUG environment variable before running the
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application. Output from these statements is sent to stdout.
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</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN48"
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></A
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><H2
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>Lang Tags</H2
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><P
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>Each font in the database contains a list of languages it supports. This is
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computed by comparing the Unicode coverage of the font with the orthography
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of each language. Languages are tagged using an RFC-3066 compatible naming
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and occur in two parts -- the ISO 639 language tag followed a hyphen and then
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by the ISO 3166 country code. The hyphen and country code may be elided.
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</P
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><P
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>Fontconfig has orthographies for several languages built into the library.
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No provision has been made for adding new ones aside from rebuilding the
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library. It currently supports 122 of the 139 languages named in ISO 639-1,
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141 of the languages with two-letter codes from ISO 639-2 and another 30
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languages with only three-letter codes. Languages with both two and three
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letter codes are provided with only the two letter code.
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</P
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><P
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>For languages used in multiple territories with radically different
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character sets, fontconfig includes per-territory orthographies. This
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includes Azerbaijani, Kurdish, Pashto, Tigrinya and Chinese.
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</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN53"
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></A
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><H2
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>Configuration File Format</H2
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><P
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>Configuration files for fontconfig are stored in XML format; this
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format makes external configuration tools easier to write and ensures that
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they will generate syntactically correct configuration files. As XML
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files are plain text, they can also be manipulated by the expert user using
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a text editor.
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</P
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><P
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>The fontconfig document type definition resides in the external entity
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"fonts.dtd"; this is normally stored in the default font configuration
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directory (/etc/fonts). Each configuration file should contain the
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following structure:
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<PRE
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CLASS="PROGRAMLISTING"
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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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...
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</fontconfig>
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</PRE
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>
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</P
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN58"
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></A
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><H3
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><TT
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CLASS="LITERAL"
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><fontconfig></TT
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></H3
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><P
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>This is the top level element for a font configuration and can contain
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<CODE
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CLASS="SGMLTAG"
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>dir</CODE
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>, <CODE
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CLASS="SGMLTAG"
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>cache</CODE
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>, <CODE
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CLASS="SGMLTAG"
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>include</CODE
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>, <CODE
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CLASS="SGMLTAG"
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>match</CODE
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> and <CODE
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CLASS="SGMLTAG"
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>alias</CODE
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> elements in any order.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN67"
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></A
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><H3
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><CODE
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CLASS="SGMLTAG"
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>dir</CODE
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></H3
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><P
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>This element contains a directory name which will be scanned for font files
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to include in the set of available fonts.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN71"
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></A
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><H3
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><CODE
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CLASS="SGMLTAG"
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>cache</CODE
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></H3
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><P
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>This element contains a file name for the per-user cache of font
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information. If it starts with '~', it refers to a file in the users
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home directory. This file is used to hold information about fonts that
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isn't present in the per-directory cache files. It is automatically
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maintained by the fontconfig library. The default for this file
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is ``~/.fonts.cache-<CODE
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CLASS="SGMLTAG"
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>version</CODE
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>'', where <CODE
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CLASS="SGMLTAG"
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>version</CODE
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> is the font configuration
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file version number (currently 2).
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
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><A
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NAME="AEN77"
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></A
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><H3
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><CODE
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CLASS="SGMLTAG"
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>include ignore_missing="no"</CODE
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></H3
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><P
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>This element contains the name of an additional configuration file or
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directory. If a directory, every file within that directory starting with an
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ASCII digit (U+0030 - U+0039) and ending with the string ``.conf'' will be processed in sorted order. When
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the XML datatype is traversed by FcConfigParse, the contents of the file(s)
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will also be incorporated into the configuration by passing the filename(s) to
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FcConfigLoadAndParse. If 'ignore_missing' is set to "yes" instead of the
|
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default "no", a missing file or directory will elicit no warning message from
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the library.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
|
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><A
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NAME="AEN81"
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></A
|
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><H3
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><CODE
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CLASS="SGMLTAG"
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>config</CODE
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></H3
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><P
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>This element provides a place to consolidate additional configuration
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information. <CODE
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CLASS="SGMLTAG"
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>config</CODE
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> can contain <CODE
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CLASS="SGMLTAG"
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>blank</CODE
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> and <CODE
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CLASS="SGMLTAG"
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>rescan</CODE
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> elements in any
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order.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
|
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><A
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NAME="AEN88"
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></A
|
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><H3
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><CODE
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CLASS="SGMLTAG"
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>blank</CODE
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></H3
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><P
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|
>Fonts often include "broken" glyphs which appear in the encoding but are
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drawn as blanks on the screen. Within the <CODE
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|
CLASS="SGMLTAG"
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|
>blank</CODE
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|
> element, place each
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Unicode characters which is supposed to be blank in an <CODE
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|
CLASS="SGMLTAG"
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>int</CODE
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> element.
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Characters outside of this set which are drawn as blank will be elided from
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the set of characters supported by the font.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
|
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><A
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NAME="AEN94"
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></A
|
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><H3
|
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><CODE
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CLASS="SGMLTAG"
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>rescan</CODE
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></H3
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><P
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|
>The <CODE
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CLASS="SGMLTAG"
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>rescan</CODE
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> element holds an <CODE
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CLASS="SGMLTAG"
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>int</CODE
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> element which indicates the default
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interval between automatic checks for font configuration changes.
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Fontconfig will validate all of the configuration files and directories and
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automatically rebuild the internal datastructures when this interval passes.
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</P
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></DIV
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><DIV
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CLASS="REFSECT2"
|
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><A
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NAME="AEN100"
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></A
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><H3
|
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><CODE
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CLASS="SGMLTAG"
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>selectfont</CODE
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></H3
|
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><P
|
|
>This element is used to black/white list fonts from being listed or matched
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against. It holds acceptfont and rejectfont elements.
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</P
|
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></DIV
|
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><DIV
|
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CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN104"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>acceptfont</CODE
|
|
></H3
|
|
><P
|
|
>Fonts matched by an acceptfont element are "whitelisted"; such fonts are
|
|
explicitly included in the set of fonts used to resolve list and match
|
|
requests; including them in this list protects them from being "blacklisted"
|
|
by a rejectfont element. Acceptfont elements include glob and pattern
|
|
elements which are used to match fonts.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN108"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>rejectfont</CODE
|
|
></H3
|
|
><P
|
|
>Fonts matched by an rejectfont element are "blacklisted"; such fonts are
|
|
excluded from the set of fonts used to resolve list and match requests as if
|
|
they didn't exist in the system. Rejectfont elements include glob and
|
|
pattern elements which are used to match fonts.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN112"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>glob</CODE
|
|
></H3
|
|
><P
|
|
>Glob elements hold shell-style filename matching patterns (including ? and
|
|
*) which match fonts based on their complete pathnames. This can be used to
|
|
exclude a set of directories (/usr/share/fonts/uglyfont*), or particular
|
|
font file types (*.pcf.gz), but the latter mechanism relies rather heavily
|
|
on filenaming conventions which can't be relied upon. Note that globs
|
|
only apply to directories, not to individual fonts.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN116"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>pattern</CODE
|
|
></H3
|
|
><P
|
|
>Pattern elements perform list-style matching on incoming fonts; that is,
|
|
they hold a list of elements and associated values. If all of those
|
|
elements have a matching value, then the pattern matches the font. This can
|
|
be used to select fonts based on attributes of the font (scalable, bold,
|
|
etc), which is a more reliable mechanism than using file extensions.
|
|
Pattern elements include patelt elements.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN120"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>patelt name="property"</CODE
|
|
></H3
|
|
><P
|
|
>Patelt elements hold a single pattern element and list of values. They must
|
|
have a 'name' attribute which indicates the pattern element name. Patelt
|
|
elements include int, double, string, matrix, bool, charset and const
|
|
elements.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN124"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>match target="pattern"</CODE
|
|
></H3
|
|
><P
|
|
>This element holds first a (possibly empty) list of <CODE
|
|
CLASS="SGMLTAG"
|
|
>test</CODE
|
|
> elements and then
|
|
a (possibly empty) list of <CODE
|
|
CLASS="SGMLTAG"
|
|
>edit</CODE
|
|
> elements. Patterns which match all of the
|
|
tests are subjected to all the edits. If 'target' is set to "font" instead
|
|
of the default "pattern", then this element applies to the font name
|
|
resulting from a match rather than a font pattern to be matched. If 'target'
|
|
is set to "scan", then this element applies when the font is scanned to
|
|
build the fontconfig database.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN130"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>test qual="any" name="property" target="default" compare="eq"</CODE
|
|
></H3
|
|
><P
|
|
>This element contains a single value which is compared with the target
|
|
('pattern', 'font', 'scan' or 'default') property "property" (substitute any of the property names seen
|
|
above). 'compare' can be one of "eq", "not_eq", "less", "less_eq", "more", or
|
|
"more_eq". 'qual' may either be the default, "any", in which case the match
|
|
succeeds if any value associated with the property matches the test value, or
|
|
"all", in which case all of the values associated with the property must
|
|
match the test value. When used in a <match target="font"> element,
|
|
the target= attribute in the <test> element selects between matching
|
|
the original pattern or the font. "default" selects whichever target the
|
|
outer <match> element has selected.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN134"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>edit name="property" mode="assign" binding="weak"</CODE
|
|
></H3
|
|
><P
|
|
>This element contains a list of expression elements (any of the value or
|
|
operator elements). The expression elements are evaluated at run-time and
|
|
modify the property "property". The modification depends on whether
|
|
"property" was matched by one of the associated <CODE
|
|
CLASS="SGMLTAG"
|
|
>test</CODE
|
|
> elements, if so, the
|
|
modification may affect the first matched value. Any values inserted into
|
|
the property are given the indicated binding ("strong", "weak" or "same")
|
|
with "same" binding using the value from the matched pattern element.
|
|
'mode' is one of:
|
|
<PRE
|
|
CLASS="PROGRAMLISTING"
|
|
> Mode With Match Without Match
|
|
---------------------------------------------------------------------
|
|
"assign" Replace matching value Replace all values
|
|
"assign_replace" Replace all values Replace all values
|
|
"prepend" Insert before matching Insert at head of list
|
|
"prepend_first" Insert at head of list Insert at head of list
|
|
"append" Append after matching Append at end of list
|
|
"append_last" Append at end of list Append at end of list
|
|
</PRE
|
|
>
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN140"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>int</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>double</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>string</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>bool</CODE
|
|
></H3
|
|
><P
|
|
>These elements hold a single value of the indicated type. <CODE
|
|
CLASS="SGMLTAG"
|
|
>bool</CODE
|
|
>
|
|
elements hold either true or false. An important limitation exists in
|
|
the parsing of floating point numbers -- fontconfig requires that
|
|
the mantissa start with a digit, not a decimal point, so insert a leading
|
|
zero for purely fractional values (e.g. use 0.5 instead of .5 and -0.5
|
|
instead of -.5).
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN148"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>matrix</CODE
|
|
></H3
|
|
><P
|
|
>This element holds the four <CODE
|
|
CLASS="SGMLTAG"
|
|
>double</CODE
|
|
> elements of an affine
|
|
transformation.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN153"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>name</CODE
|
|
></H3
|
|
><P
|
|
>Holds a property name. Evaluates to the first value from the property of
|
|
the font, not the pattern.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN157"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>const</CODE
|
|
></H3
|
|
><P
|
|
>Holds the name of a constant; these are always integers and serve as
|
|
symbolic names for common font values:
|
|
<PRE
|
|
CLASS="PROGRAMLISTING"
|
|
> Constant Property Value
|
|
-------------------------------------
|
|
thin weight 0
|
|
extralight weight 40
|
|
ultralight weight 40
|
|
light weight 50
|
|
book weight 75
|
|
regular weight 80
|
|
normal weight 80
|
|
medium weight 100
|
|
demibold weight 180
|
|
semibold weight 180
|
|
bold weight 200
|
|
extrabold weight 205
|
|
black weight 210
|
|
heavy weight 210
|
|
roman slant 0
|
|
italic slant 100
|
|
oblique slant 110
|
|
ultracondensed width 50
|
|
extracondensed width 63
|
|
condensed width 75
|
|
semicondensed width 87
|
|
normal width 100
|
|
semiexpanded width 113
|
|
expanded width 125
|
|
extraexpanded width 150
|
|
ultraexpanded width 200
|
|
proportional spacing 0
|
|
dual spacing 90
|
|
mono spacing 100
|
|
charcell spacing 110
|
|
unknown rgba 0
|
|
rgb rgba 1
|
|
bgr rgba 2
|
|
vrgb rgba 3
|
|
vbgr rgba 4
|
|
none rgba 5
|
|
hintnone hintstyle 0
|
|
hintslight hintstyle 1
|
|
hintmedium hintstyle 2
|
|
hintfull hintstyle 3
|
|
</PRE
|
|
>
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN162"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>or</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>and</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>plus</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>minus</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>times</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>divide</CODE
|
|
></H3
|
|
><P
|
|
>These elements perform the specified operation on a list of expression
|
|
elements. <CODE
|
|
CLASS="SGMLTAG"
|
|
>or</CODE
|
|
> and <CODE
|
|
CLASS="SGMLTAG"
|
|
>and</CODE
|
|
> are boolean, not bitwise.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN173"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>eq</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>not_eq</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>less</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>less_eq</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>more</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>more_eq</CODE
|
|
></H3
|
|
><P
|
|
>These elements compare two values, producing a boolean result.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN182"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>not</CODE
|
|
></H3
|
|
><P
|
|
>Inverts the boolean sense of its one expression element
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN186"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>if</CODE
|
|
></H3
|
|
><P
|
|
>This element takes three expression elements; if the value of the first is
|
|
true, it produces the value of the second, otherwise it produces the value
|
|
of the third.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN190"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>alias</CODE
|
|
></H3
|
|
><P
|
|
>Alias elements provide a shorthand notation for the set of common match
|
|
operations needed to substitute one font family for another. They contain a
|
|
<CODE
|
|
CLASS="SGMLTAG"
|
|
>family</CODE
|
|
> element followed by optional <CODE
|
|
CLASS="SGMLTAG"
|
|
>prefer</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>accept</CODE
|
|
> and <CODE
|
|
CLASS="SGMLTAG"
|
|
>default</CODE
|
|
>
|
|
elements. Fonts matching the <CODE
|
|
CLASS="SGMLTAG"
|
|
>family</CODE
|
|
> element are edited to prepend the
|
|
list of <CODE
|
|
CLASS="SGMLTAG"
|
|
>prefer</CODE
|
|
>ed families before the matching <CODE
|
|
CLASS="SGMLTAG"
|
|
>family</CODE
|
|
>, append the
|
|
<CODE
|
|
CLASS="SGMLTAG"
|
|
>accept</CODE
|
|
>able families after the matching <CODE
|
|
CLASS="SGMLTAG"
|
|
>family</CODE
|
|
> and append the <CODE
|
|
CLASS="SGMLTAG"
|
|
>default</CODE
|
|
>
|
|
families to the end of the family list.
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN204"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>family</CODE
|
|
></H3
|
|
><P
|
|
>Holds a single font family name
|
|
</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN208"
|
|
></A
|
|
><H3
|
|
><CODE
|
|
CLASS="SGMLTAG"
|
|
>prefer</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>accept</CODE
|
|
>, <CODE
|
|
CLASS="SGMLTAG"
|
|
>default</CODE
|
|
></H3
|
|
><P
|
|
>These hold a list of <CODE
|
|
CLASS="SGMLTAG"
|
|
>family</CODE
|
|
> elements to be used by the <CODE
|
|
CLASS="SGMLTAG"
|
|
>alias</CODE
|
|
> element.
|
|
<CODE
|
|
CLASS="SGMLTAG"
|
|
>/article</CODE
|
|
>
|
|
</P
|
|
></DIV
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT1"
|
|
><A
|
|
NAME="AEN217"
|
|
></A
|
|
><H2
|
|
>EXAMPLE CONFIGURATION FILE</H2
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN219"
|
|
></A
|
|
><H3
|
|
>System configuration file</H3
|
|
><P
|
|
>This is an example of a system-wide configuration file
|
|
</P
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
|
><?xml version="1.0"?>
|
|
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
|
|
<!-- /etc/fonts/fonts.conf file to configure system font access -->
|
|
<fontconfig>
|
|
<!--
|
|
Find fonts in these directories
|
|
-->
|
|
<dir>/usr/share/fonts</dir>
|
|
<dir>/usr/X11R6/lib/X11/fonts</dir>
|
|
|
|
<!--
|
|
Accept deprecated 'mono' alias, replacing it with 'monospace'
|
|
-->
|
|
<match target="pattern">
|
|
<test qual="any" name="family"><string>mono</string></test>
|
|
<edit name="family" mode="assign"><string>monospace</string></edit>
|
|
</match>
|
|
|
|
<!--
|
|
Names not including any well known alias are given 'sans'
|
|
-->
|
|
<match target="pattern">
|
|
<test qual="all" name="family" mode="not_eq">sans</test>
|
|
<test qual="all" name="family" mode="not_eq">serif</test>
|
|
<test qual="all" name="family" mode="not_eq">monospace</test>
|
|
<edit name="family" mode="append_last"><string>sans</string></edit>
|
|
</match>
|
|
|
|
<!--
|
|
Load per-user customization file, but don't complain
|
|
if it doesn't exist
|
|
-->
|
|
<include ignore_missing="yes">~/.fonts.conf</include>
|
|
|
|
<!--
|
|
Load local customization files, but don't complain
|
|
if there aren't any
|
|
-->
|
|
<include ignore_missing="yes">conf.d</include>
|
|
<include ignore_missing="yes">local.conf</include>
|
|
|
|
<!--
|
|
Alias well known font names to available TrueType fonts.
|
|
These substitute TrueType faces for similar Type1
|
|
faces to improve screen appearance.
|
|
-->
|
|
<alias>
|
|
<family>Times</family>
|
|
<prefer><family>Times New Roman</family></prefer>
|
|
<default><family>serif</family></default>
|
|
</alias>
|
|
<alias>
|
|
<family>Helvetica</family>
|
|
<prefer><family>Arial</family></prefer>
|
|
<default><family>sans</family></default>
|
|
</alias>
|
|
<alias>
|
|
<family>Courier</family>
|
|
<prefer><family>Courier New</family></prefer>
|
|
<default><family>monospace</family></default>
|
|
</alias>
|
|
|
|
<!--
|
|
Provide required aliases for standard names
|
|
Do these after the users configuration file so that
|
|
any aliases there are used preferentially
|
|
-->
|
|
<alias>
|
|
<family>serif</family>
|
|
<prefer><family>Times New Roman</family></prefer>
|
|
</alias>
|
|
<alias>
|
|
<family>sans</family>
|
|
<prefer><family>Arial</family></prefer>
|
|
</alias>
|
|
<alias>
|
|
<family>monospace</family>
|
|
<prefer><family>Andale Mono</family></prefer>
|
|
</alias>
|
|
</fontconfig>
|
|
</PRE
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT2"
|
|
><A
|
|
NAME="AEN223"
|
|
></A
|
|
><H3
|
|
>User configuration file</H3
|
|
><P
|
|
>This is an example of a per-user configuration file that lives in
|
|
~/.fonts.conf
|
|
</P
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
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><?xml version="1.0"?>
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<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
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<!-- ~/.fonts.conf for per-user font configuration -->
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<fontconfig>
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<!--
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Private font directory
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-->
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<dir>~/.fonts</dir>
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<!--
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use rgb sub-pixel ordering to improve glyph appearance on
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LCD screens. Changes affecting rendering, but not matching
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should always use target="font".
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-->
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<match target="font">
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<edit name="rgba" mode="assign"><const>rgb</const></edit>
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</match>
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</fontconfig>
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</PRE
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN227"
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></A
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><H2
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>Files</H2
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><P
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><SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>fonts.conf</I
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></SPAN
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>
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contains configuration information for the fontconfig library
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consisting of directories to look at for font information as well as
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instructions on editing program specified font patterns before attempting to
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match the available fonts. It is in xml format.
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</P
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><P
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><SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>conf.d</I
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></SPAN
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>
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is the conventional name for a directory of additional configuration files
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managed by external applications or the local administrator. The
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filenames starting with decimal digits are sorted in lexicographic order
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and used as additional configuration files. All of these files are in xml
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format. The master fonts.conf file references this directory in an
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<include> directive.
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</P
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><P
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><SPAN
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CLASS="emphasis"
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><I
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CLASS="EMPHASIS"
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>fonts.dtd</I
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></SPAN
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>
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is a DTD that describes the format of the configuration files.
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</P
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><P
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><SPAN
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CLASS="emphasis"
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><I
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|
CLASS="EMPHASIS"
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|
>~/.fonts.conf</I
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|
></SPAN
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>
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is the conventional location for per-user font configuration, although the
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actual location is specified in the global fonts.conf file.
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</P
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><P
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><SPAN
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|
CLASS="emphasis"
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><I
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|
CLASS="EMPHASIS"
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> ~/.fonts.cache-*</I
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></SPAN
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>
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is the conventional repository of font information that isn't found in the
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per-directory caches. This file is automatically maintained by fontconfig.
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</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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|
NAME="AEN239"
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></A
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><H2
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|
>See Also</H2
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><P
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|
>fc-cache(1), fc-match(1), fc-list(1)
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</P
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|
></DIV
|
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><DIV
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|
CLASS="REFSECT1"
|
|
><A
|
|
NAME="AEN242"
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|
></A
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><H2
|
|
>Version</H2
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|
><P
|
|
>Fontconfig version 2.4.1
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|
</P
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></DIV
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></BODY
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></HTML
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> |