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<!-- meta page description: PostScript DISPLAY DRIVER -->
<em>PS display driver</em> to create PostScript files.
<h2>DESCRIPTION</h2>
The PS driver generates a PostScript file from GRASS display commands.
<h2>USAGE</h2>
<h3>Environment variables</h3>
The PS driver can be enabled by setting <b>GRASS_RENDER_IMMEDIATE</b>
variable, eg.
<div class="code"><pre>
export GRASS_RENDER_IMMEDIATE=ps
</pre></div>
Several environment variables affect the operation of the PS driver:
<ul>
<li><b>GRASS_RENDER_WIDTH=xxx</b><br>
the width of the image map (default is 640).
</li>
<li><b>GRASS_RENDER_HEIGHT=yyy</b><br>
the height of the image map (default is 480).
</li>
<li><b>GRASS_RENDER_TRUECOLOR=[TRUE|FALSE]</b><br>
sets true-color support. Default is FALSE.
</li>
<li><b>GRASS_RENDER_FILE</b><br>
name of output file. If it ends with ".eps" an EPS file
will be created.
</li>
<li><b>GRASS_RENDER_PS_PAPER</b><br>
sets the screen dimensions and margins to
fit a standard paper size, see also GRASS_RENDER_WIDTH, GRASS_RENDER_HEIGHT.
</li>
<li><b>GRASS_RENDER_PS_LANDSCAPE</b><br>
if <code>TRUE</code>, the screen is rotated 90 degrees
counter-clockwise so that a "landscape" screen fits better on
"portrait" paper.
</li>
<li><b>GRASS_RENDER_PS_HEADER</b><br>
if <code>FALSE</code>, the output is appended to any existing file,
and no prolog or setup sections are generated.
</li>
<li><b>GRASS_RENDER_PS_TRAILER</b><br>
if <code>FALSE</code>, no trailer section is generated.
</li>
</ul>
<h3>Example</h3>
<div class="code"><pre>
export GRASS_RENDER_IMMEDIATE=ps
export GRASS_RENDER_TRUECOLOR=TRUE
g.region raster=elevation
d.rast elevation
d.vect roadsmajor color=red
</pre></div>
This writes a file named <code>map.ps</code> in your current directory.
<h2>NOTES</h2>
The resolution of the output files is defined by current region
extents. Use <code>g.region -p</code> to get the number of rows and cols
and use the environment variables to set the image size. If you would
like a larger image, multiply both rows and cols by the same whole
number to preserve the aspect ratio.
<p>GRASS_RENDER_TRUECOLOR requires either PostScript level 2 or level 1 plus the
colorimage and setrgbcolor operators (this is the case for colour
printers which pre-date level 2 PostScript).
<p>Masked images (<code>d.rast</code>, <code>d.rgb</code>, <code>d.his -n</code>)
require PostScript level 3.
<h2>SEE ALSO</h2>
<em>
<a href="cairodriver.html">Cairo driver</a>,
<a href="pngdriver.html">PNG driver</a>,
<a href="htmldriver.html">HTML driver</a>,
<a href="variables.html">variables</a>
</em>
<br><br>
<em>
<a href="d.rast.html">d.rast</a>,
<a href="d.vect.html">d.vect</a>,
<a href="d.mon.html">d.mon</a>,
<a href="d.erase.html">d.erase</a>,
<a href="d.redraw.html">d.redraw</a>
</em>
<h2>AUTHOR</h2>
Glynn Clements, 2007
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