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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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vol_200
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287_02
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readme.doc
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1989-05-25
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GRAD graphics library is a collection of functions for drawing dots,
lines, circles, ellipsis, arcs and also for region filling, characters
display, printing ... et cetera. Several useful sample programs such as a
sideway printing, a graphics and text merge printing and a graphics command
interpreter are provided. The source listings of sample programs are included
too. All the sample programs are in public domain.
GRAD supports for CGA (640 X 200) and HGA (720 X 348) graphics mode.
Other graphics display adapter can be configured too. However, graphics
display device is not absolutely necessary in GRAD system because up to 9 user
virtual screen with user definable size can be created at run time.
The printers supported by GRAD are EPSON FX-80, OKIDATA ML192 or
compatibles and laser printers using JLASER card. Instructions to configure
GRAD for other printers are provided too.
The major difference of GRAD library from other graphics library are its
superior character display function and versatile printing functions. With
GRAD library, less than 200 lines of commented coded are required to write a
sideway printing program with user definable size, font type, spacing, top and
bottom margins.
Furthermore GRAD provides very high speed operations. To draw a
horizontal line of length 300 pixels on a 8MHz, 1 wait state AT, it takes
about 1 microsecond per pixel on average. The whole library uses integer
arithmetic only. This ensures high speed operations with or without math
co-processor.
In order to use GRAD library, you have to configure the GRAD library for
the display adapter and printer in your system. See INSTALL.DOC on information
about installation.
After installation, try out some of the features of GRAD library
according to the instructions in TEST.DOC.
The manual for GRAD library and the sample programs can be printed by
copying the file GRADUSER.DOC to the printing device
copy GRADUSER.DOC PRN
or use the DOS printer spooler PRINT
print GRADUSER.DOC