The R13B03 release.OTP_R13B03

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+<?xml version="1.0" encoding="latin1" ?>
+<!DOCTYPE chapter SYSTEM "chapter.dtd">
+
+<chapter>
+  <header>
+    <copyright>
+      <year>2000</year><year>2009</year>
+      <holder>Ericsson AB. All Rights Reserved.</holder>
+    </copyright>
+    <legalnotice>
+      The contents of this file are subject to the Erlang Public License,
+      Version 1.1, (the "License"); you may not use this file except in
+      compliance with the License. You should have received a copy of the
+      Erlang Public License along with this software. If not, it can be
+      retrieved online at http://www.erlang.org/.
+    
+      Software distributed under the License is distributed on an "AS IS"
+      basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+      the License for the specific language governing rights and limitations
+      under the License.
+    
+    </legalnotice>
+
+    <title>Fonts</title>
+    <prepared></prepared>
+    <docno></docno>
+    <date></date>
+    <rev></rev>
+    <file>gs_chapter5.xml</file>
+  </header>
+
+  <section>
+    <title>The Font Model</title>
+    <p>Text related objects can be handled with the font option <c><![CDATA[{font,Font}]]></c>. A <c><![CDATA[Font]]></c> is represented as a two or three tuple:</p>
+    <list type="bulleted">
+      <item><c><![CDATA[{Family,Size}]]></c></item>
+      <item><c><![CDATA[{Family,Style,Size}]]></c></item>
+    </list>
+    <p>Examples of fonts are: <c><![CDATA[{times,12}]]></c>, <c><![CDATA[{symbol,bold,18}]]></c>, <c><![CDATA[{courier,[bold,italic],6}]]></c>, <c><![CDATA[{screen,12}]]></c>.</p>
+    <p>The most important requirement with the font model is to ensure that there is always a "best possible" font present. For example, if an application tries to use the font <c><![CDATA[{times,17}]]></c> on a computer system which does not have this font available, the <c><![CDATA[gs]]></c> font model automatically substitutes <c><![CDATA[{times,16}]]></c>.</p>
+    <p>Note that GS requires that the following fonts are available if using an X-server display:</p>
+    <list type="bulleted">
+      <item>fixed</item>
+      <item>-*-courier-*</item>
+      <item>-*-times-*</item>
+      <item>-*-helvetica-*</item>
+      <item>-*-symbol-*</item>
+      <item>"-*-new century schoolbook-"</item>
+      <item>-*-screen-*</item>
+    </list>
+    <p>To find out which font is actually chosen by the <c><![CDATA[gs]]></c>, use the option <c><![CDATA[{choose_font,Font}]]></c>. For example, the following situation might occur:</p>
+    <pre><![CDATA[
+1> <input>G=gs:start().</input>
+{1,<0.20.0>}
+2><input>gs:read(G,{choose_font,{times,38}}).</input>
+{times,[],38}
+3> <input>gs:read(G,{choose_font,{screen,italic,6}}).</input> 
+{courier,italic,6}
+4> 
+    ]]></pre>
+    <p>When programming with fonts, it is often necessary to find the size of a string which uses a specific font. <c><![CDATA[{font_wh,Font}]]></c> returns the width and height of any string and any font. The following example illustrates its usage:</p>
+    <marker id="gs_fig6"></marker>
+    <image file="images/ex15.gif">
+      <icaption>Font Examples</icaption>
+    </image>
+    <codeinclude file="examples/ex15.erl" tag="" type="erl"></codeinclude>
+  </section>
+</chapter>
+