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<!doctype HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>CD_METAFILE</title>
<link rel="stylesheet" type="text/css" href="../../style.css">
</head>
<body>
<h2>CD_PICTURE - CD Picture (cdpicture.h)</h2>
<p>This driver allows the creation of a CD Picture. It store primitives and
attributes in memory that can be played and resized in any other driver. It
does not includes clipping and WriteMode.</p>
<h3>Use</h3>
<p>The file is created by calling function <font face="Courier">
<a href="../func/init.html#cdCreateCanvas"><strong>cdCreateCanvas</strong></a>(CD_PICTURE,
Data)</font>. The <font face="Courier">Data</font> parameter is a string that
can contain the resolution in the following format:</p>
<pre>"[resolution]" or in <em>C use "<strong><tt>%lg</tt></strong>"</em></pre>
<p><font face="Courier">Resolution </font>is the number of pixels per millimeter; its default value is
"3.78 pixels/mm" (96 DPI).</p>
<p>The canvas size is automatically calculated to be the bounding box of all the
primitives inside the picture.</p>
<p>Any amount of such canvases may exist simultaneously. It is important to note that a call to function
<a href="../func/init.html#cdKillCanvas"><font face="Courier"><strong>
cdKillCanvas</strong></font></a> is required to release the picture memory.</p>
<h3>Behavior of Functions</h3>
<h4>Coordinate System and Clipping </h4>
<ul>
<li><a href="../func/other.html#cdPlay">
<font face="Courier"><strong>Play</strong></font></a>: implemented. </li>
<li><a href="../func/coordinates.html#cdUpdateYAxis"><font face="Courier">
<strong>UpdateYAxis</strong></font></a>: does nothing.</li>
<li><b><strong>Clipping</strong>:</b> not supported.</li>
<li><strong>Transformation Matrix</strong>: not supported.</li>
<li><a href="../func/coordinates.html#cdGetCanvasSize">cdGetCanvasSize</a>:
returns the size of the bounding box that includes all primitives inside the
picture.</li>
</ul>
<h4>Attributes</h4>
<dir>
<li><a href="../func/attributes.html#cdWriteMode"><font face="Courier">
<strong>
WriteMode</strong></font></a>: does nothing.</li>
<li><a href="../func/text.html#cdFontDim"><font face="Courier"><strong>FontDim</strong></font></a>:
uses a size estimator, returning approximate values.</li>
<li><a href="../func/text.html#cdTextSize"><font face="Courier"><strong>
TextSize</strong></font></a>: uses a size estimator, returning approximate values.</li>
</dir>
<h4>Colors</h4>
<ul>
<li><a href="../func/color.html#cdGetColorPlanes"><font face="Courier">
<strong>
GetColorPlanes</strong></font></a>: always returns 24.</li>
</ul>
<h4>Primitives</h4>
<ul>
<li>Floating point primitives are supported.</li>
</ul>
<h4>Client Images</h4>
<ul>
<li><a href="../func/client.html#cdGetImageRGB"><font face="Courier"><strong>
GetImageRGB</strong></font></a>: does nothing.</li>
</ul>
<h4>Server Images</h4>
<ul>
<li>All functions do nothing.</li>
</ul>
</body>
</html>
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