7.4 postscript prologues
The prologue files located in the include directory
are used by the Postscript
graphics servers to define the standard macros used to
realize the graphics primitives.
There are three different prologue files :
- bwserver.prologue
The standard black-and-white prologue used by bwserver
Define a standard 7-pen lookup table with selected shades of gray,
and a 256-level gray lookup table
- cpserver.prologue
The simple colour prologue used by cpserver
Define a standard 7-pen lookup table with selected fundamental colours,
and a 256-level colour RGB lookup table initialized to shades of red
- c2server.prologue
The Level-2 colour prologue used by c2server
is similar to the previous but uses a Level-2 operator for images (with /ASCIIHexDecode filter)
which allows image data to point directly into the colour lookup table (this means the data is
3 times less bulky)
At present they all define inside a simplified version of the marker definition file
sax.iasf-milano.inaf.it/Xashelp/Prog/incmisc.4.html
:: original creation 2002 Sep 04 18:19:51 CEST ::
last edit 2002 Sep 04 18:19:51 CEST