<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>8.11. AAlib – text mode displaying</title><link rel="stylesheet" href="default.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="MPlayer - 电影播放器"><link rel="up" href="video.html" title="第 8 章 Video output devices"><link rel="prev" href="opengl.html" title="8.10. 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MPlayer skin format"><link rel="appendix" href="history.html" title="附录 D. History"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">8.11. AAlib – text mode displaying</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="opengl.html">上一页</a> </td><th width="60%" align="center">第 8 章 Video output devices</th><td width="20%" align="right"> <a accesskey="n" href="caca.html">下一页</a></td></tr></table><hr></div><div class="sect1" lang="zh-CN"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="aalib"></a>8.11. AAlib – text mode displaying</h2></div></div></div><p> AAlib is a library for displaying graphics in text mode, using powerful ASCII renderer. There are <span class="emphasis"><em>lots</em></span> of programs already supporting it, like Doom, Quake, etc. <span class="application">MPlayer</span> contains a very usable driver for it. If <tt class="filename">./configure</tt> detects aalib installed, the aalib libvo driver will be built. </p><p> You can use some keys in the AA Window to change rendering options: </p><div class="informaltable"><table border="1"><colgroup><col><col></colgroup><thead><tr><th>Key</th><th>Action</th></tr></thead><tbody><tr><td><span class="keycap"><b>1</b></span></td><td> decrease contrast </td></tr><tr><td><span class="keycap"><b>2</b></span></td><td> increase contrast </td></tr><tr><td><span class="keycap"><b>3</b></span></td><td> decrease brightness </td></tr><tr><td><span class="keycap"><b>4</b></span></td><td> increase brightness </td></tr><tr><td><span class="keycap"><b>5</b></span></td><td> switch fast rendering on/off </td></tr><tr><td><span class="keycap"><b>6</b></span></td><td> set dithering mode (none, error distribution, Floyd Steinberg) </td></tr><tr><td><span class="keycap"><b>7</b></span></td><td> invert image </td></tr><tr><td><span class="keycap"><b>8</b></span></td><td> toggles between aa and <span class="application">MPlayer</span> control </td></tr></tbody></table></div><div class="variablelist"><p class="title"><b>The following command line options can be used:</b></p><dl><dt><span class="term"><tt class="option">-aaosdcolor=<em class="replaceable"><code>V</code></em></tt></span></dt><dd><p> change OSD color </p></dd><dt><span class="term"><tt class="option">-aasubcolor=<em class="replaceable"><code>V</code></em></tt></span></dt><dd><p> Change subtitle color </p><p> where <em class="replaceable"><code>V</code></em> can be: <code class="literal">0</code> (normal), <code class="literal">1</code> (dark), <code class="literal">2</code> (bold), <code class="literal">3</code> (bold font), <code class="literal">4</code> (reverse), <code class="literal">5</code> (special). </p></dd></dl></div><div class="variablelist"><p class="title"><b>AAlib itself provides a large sum of options. Here are some important:</b></p><dl><dt><span class="term"><tt class="option">-aadriver</tt></span></dt><dd><p> Set recommended aa driver (X11, curses, Linux). </p></dd><dt><span class="term"><tt class="option">-aaextended</tt></span></dt><dd><p> Use all 256 characters. </p></dd><dt><span class="term"><tt class="option">-aaeight</tt></span></dt><dd><p> Use eight bit ASCII. </p></dd><dt><span class="term"><tt class="option">-aahelp</tt></span></dt><dd><p> Prints out all aalib options. </p></dd></dl></div><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">注意</h3><p> The rendering is very CPU intensive, especially when using AA-on-X (using aalib on X), and it's least CPU intensive on standard, non-framebuffer console. Use SVGATextMode to set up a big textmode, then enjoy! (secondary head Hercules cards rock :)) (but IMHO you can use <tt class="option">-vf 1bpp</tt> option to get graphics on hgafb:) </p></div><p> Use the <tt class="option">-framedrop</tt> option if your computer isn't fast enough to render all frames! </p><p> Playing on terminal you'll get better speed and quality using the Linux driver, not curses (<tt class="option">-aadriver linux</tt>). But therefore you need write access on <tt class="filename">/dev/vcsa<em class="replaceable"><code><terminal></code></em></tt>! That isn't autodetected by aalib, but vo_aa tries to find the best mode. See <a class="ulink" href="http://aa-project.sf.net/tune" target="_top">http://aa-project.sf.net/tune</a> for further tuning issues. </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="opengl.html">上一页</a> </td><td width="20%" align="center"><a accesskey="u" href="video.html">上一级</a></td><td width="40%" align="right"> <a accesskey="n" href="caca.html">下一页</a></td></tr><tr><td width="40%" align="left" valign="top">8.10. OpenGL output </td><td width="20%" align="center"><a accesskey="h" href="index.html">起始页</a></td><td width="40%" align="right" valign="top"> 8.12. <code class="systemitem">libcaca</code> – Color ASCII Art library </td></tr></table></div></body></html>