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<!DOCTYPE doctype PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta name="generator" content=
"HTML Tidy for Mac OS X (vers 31 October 2006 - Apple Inc. build 15.18.1), see www.w3.org">
<meta http-equiv="Content-Type" content=
"text/html; charset=us-ascii">
<meta name="GENERATOR" content=
"Mozilla/4.78 [en] (X11; U; Linux 2.4.7-10 i686) [Netscape]">
<title>Printing</title>
</head>
<body link="#0000EE" alink="#FF0000" bgcolor="#FFFFFF" text=
"#000000" vlink="#551A8B">
<h3><img alt="" src="../sun.gif" height="98" align="middle" width=
"100"> Printing</h3>
<blockquote>
<p>DS9 provides strong Postscript printing support. This is not a
screen capture method, but a full level 1/2/3 postscript driver.
The postscript images generated are detailed and accurate as
possible, given the resolution of the data, and the printing
resolution.</p>
<p><b>Postscript Level</b></p>
<blockquote>
<p>Level 1-- The postscript generated consist of a color lookup
table and image data, encoded in <tt>ASCIIHEX</tt>. All line
graphics and text are postscript elements.</p>
<p>Level 2-- The postscript generated consist of a color lookup
table and image data, compressed with RLE, and encoded in
<tt>ASCIIHEX85.</tt> All line graphics and text are postscript
elements.</p>
</blockquote>
<blockquote>
<p>Level 3-- The postscript generated consist of a color lookup
table and image data, compressed with GZIP<tt>.</tt> All line
graphics and text are postscript elements.</p>
</blockquote>
<p><b>Postscript Color Model</b></p>
<p>DS9 supports three color models for level 2/3 postscript. All
three color models generate approximately the same size files.</p>
<blockquote><tt>RGB<br>
CMYK<br>
Grayscale<br></tt></blockquote>
<p><b>Resolution</b></p>
<p>Unlike graphic elements, image data must be sampled when encoded
into postscript. The specified resolution parameter is in "pixels
per inch" and is independent of the current screen resolution. A
value of 96 maps to the current screen resolution. Any value over
96 will over sample the image, while any value under 96 will under
sample. For high resolution printers and posters, the higher
resolution sampling, the better. However, keep in mind the size of
the postscript file grows with the square of the increase in
resolution.</p>
</blockquote>
</body>
</html>
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