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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>Seed canvas Module Documentation</title>
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<div id="header">Seed <i>canvas</i> Module</div>
<div id="subheader">v.@VERSION@</div>
<div class="section"><b>Usage</b></div>
<p>
In order to use functions from the canvas module, you must first import it:
</p>
<pre class="sh_javascript">
canvas = imports.canvas;
</pre>
<div class="section"><b>External Documentation</b></div>
<p>
The canvas module is actually an implementation of a subset of the <a href="https://developer.mozilla.org/en/Canvas_tutorial">HTML Canvas</a> element. Many of the functions from Canvas directly translate into Seed, and you can use <a href="http://www.whatwg.org/specs/web-apps/current-work/#the-canvas-element">any</a> <a href="https://developer.mozilla.org/en/HTML/Canvas">Canvas</a> <a href="http://developer.apple.com/documentation/appleapplications/Conceptual/SafariJSProgTopics/Tasks/Canvas.html">documentation</a> to help develop Seed canvas code. The drawing functions will not be redocumented here.
</p>
<div class="section"><b>new CairoCanvas</b>(cairo)<br/>
<b>new PDFCanvas</b>(filename, width, height)<br/>
<b>new SVGCanvas</b>(filename, width, height)<br/>
<b>new ImageCanvas</b>(filename, width, height)</div>
<p>
Construct a Canvas with a particular output format. <b>CairoCanvas</b>es are constructed given a <i>cairo</i> to draw to, while the others output to a file, and need to be given a size for the canvas.
</p>
</body>
</html>
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