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<title>Fonts (Guile-SDL2)</title>
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<span id="Fonts"></span><div class="header">
<p>
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<hr>
<span id="Fonts-1"></span><h3 class="section">3.11 Fonts</h3>
<div class="example">
<pre class="example">(use-modules (sdl2 ttf))
</pre></div>
<dl>
<dt id="index-ttf_002dinit">Procedure: <strong>ttf-init</strong></dt>
<dd><p>Initialize the TTF system.
</p></dd></dl>
<dl>
<dt id="index-ttf_002dquit">Procedure: <strong>ttf-quit</strong></dt>
<dd><p>Shut down and clean up the TTF system.
</p></dd></dl>
<dl>
<dt id="index-load_002dfont">Procedure: <strong>load-font</strong> <em>file point-size</em></dt>
<dd><p>Load TTF font from <var>file</var> and return a new font object whose glyph size is
<var>point-size</var>.
</p></dd></dl>
<dl>
<dt id="index-delete_002dfont_0021">Procedure: <strong>delete-font!</strong> <em>font</em></dt>
<dd><p>Delete the memory allocated for <var>font</var>.
</p></dd></dl>
<dl>
<dt id="index-font_002dheight">Procedure: <strong>font-height</strong> <em>font</em></dt>
<dd><p>Return the maximum height of <var>font</var>.
</p></dd></dl>
<dl>
<dt id="index-font_002dascent">Procedure: <strong>font-ascent</strong> <em>font</em></dt>
<dd><p>Return the maximum pixel ascent of all glyphs in <var>font</var>. This can
also be interpreted as the distance from the top of the font to the
baseline.
</p></dd></dl>
<dl>
<dt id="index-font_002ddescent">Procedure: <strong>font-descent</strong> <em>font</em></dt>
<dd><p>Return the maximum pixel descent of all glyphs in <var>font</var>. This
can also be interpreted as the distance from the baseline to the
bottom of the font.
</p></dd></dl>
<dl>
<dt id="index-font_002dline_002dskip">Procedure: <strong>font-line-skip</strong> <em>font</em></dt>
<dd><p>Return the recommended pixel height of a line of text using
<var>font</var>.
</p></dd></dl>
<dl>
<dt id="index-font_002dsize_002dtext">Procedure: <strong>font-size-text</strong> <em>font text</em></dt>
<dd><p>Return 2 values for the resulting surface size of the string
<var>text</var> using <var>font</var>.
</p></dd></dl>
<dl>
<dt id="index-font_002dglyph_002dindex">Procedure: <strong>font-glyph-index</strong> <em>font char</em></dt>
<dd><p>Return the index of the glyph for <var>char</var> in <var>font</var>, or
<code>#f</code> if <var>char</var> is not present.
</p></dd></dl>
<dl>
<dt id="index-font_002dglyph_002dmetrics">Procedure: <strong>font-glyph-metrics</strong> <em>font char</em></dt>
<dd><p>Return values for the metrics of <var>char</var> in <var>font</var>: min x, max
x, min y, max y, and advance.
</p></dd></dl>
<dl>
<dt id="index-font">font-style: <strong>font</strong></dt>
<dd><p>Return the rendering style of <var>font</var> as a list that may contain
any of the following symbols:
</p>
<ul>
<li> <code>bold</code>
</li><li> <code>italic</code>
</li><li> <code>underline</code>
</li><li> <code>strikethrough</code>
</li></ul>
<p>The empty list is returned if none of the above styles are applied.
</p></dd></dl>
<dl>
<dt id="index-font-1">font-set-style!: <strong>font</strong> <em>style</em></dt>
<dd><p>Set the rendering style of <var>font</var> to <var>style</var>, a list that may
contain any of the following symbols:
</p>
<ul>
<li> <code>bold</code>
</li><li> <code>italic</code>
</li><li> <code>underline</code>
</li><li> <code>strikethrough</code>
</li></ul>
<p>The empty list means that none of the above stylings will be used.
</p></dd></dl>
<dl>
<dt id="index-render_002dfont_002dsolid">Procedure: <strong>render-font-solid</strong> <em>font text color</em></dt>
<dd><p>Render <var>text</var>, a UTF-8 encoded string, using <var>font</var> and <var>color</var>, the
foreground color, and return a surface containing the results.
</p></dd></dl>
<dl>
<dt id="index-render_002dfont_002dblended">Procedure: <strong>render-font-blended</strong> <em>font text color</em></dt>
<dd><p>Render <var>text</var>, a UTF-8 encoded string, using <var>font</var> and <var>color</var>, the
foreground color, and return a high-quality alpha-blended surface containing the
results.
</p></dd></dl>
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