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<h1><a class="anchor" name="libcaca-env">Libcaca environment variables </a></h1>Some environment variables can be used to change the behaviour of <em>libcaca</em> without having to modify the program which uses them. These variables are:<p>
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<li><b>CACA_DRIVER:</b> set the backend video driver. In order of preference:<ul>
<li><code>conio</code> uses the DOS conio.h interface.</li><li><code>ncurses</code> uses the ncurses library.</li><li><code>slang</code> uses the S-Lang library.</li><li><code>x11</code> uses the native X11 driver.</li><li><code>gl</code> uses freeglut and opengl libraries.</li><li><code>raw</code> outputs to the standard output instead of rendering the canvas. This is can be used together with cacaserver.</li></ul>
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<li><b>CACA_GEOMETRY:</b> set the video display size. The format of this variable must be <code>XxY</code>, with <code>X</code> and <code>Y</code> being integer values. This option currently works with the raw, X11 and GL drivers.</li>
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<li><b>CACA_FONT:</b> set the rendered font. The format of this variable is implementation dependent, but since it currently only works with the X11 driver, an X11 font name such as <code>fixed</code> or <code>5x7</code> is expected. </li>
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