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GAE Graphics Software Products and GKS Compatibility
Galaxy Advanced Engineering, Inc. presents a migration bridge for callable GKS routines
within your existing FORTRAN program via its high level FORTRAN graphics library Language that is
called UGL. UGL is a Scientific Graphics Subroutine Library for any computing system
such as Main, Micro and Mini-Computers with its given Operating System. UGL presently supports
hardware such as HP/UNIX, SUN/SOLARIS, Alpha/OpenVMS, VAX/VMS, LINUX, SGI/IRIX and Windows 95/98/2000
and NT or DOS.
UGL-GRAPHICS was developed to provide a migration path with a CA-DISSPLA, GKS, PLOT-10,
CalComp, PLOT88 and DIGLIB (from Lawrence Livermore Lab.) graphics interface in the PC
and VAX as well as UNIX environment and provides the same high graphics standards found
on the main frames using the above graphics libraries. The most common subset of CA-DISSPLA
routine (more than %95) and rest of the mentioned graphics libraries are supported directly and any
particular ones may be provided upon request. If the users have an existing code using any of these
graphics library routines within them, they do not have to change their calls. The bridge that are
built with UGL-GRAPHICS library of Galaxy advanced Engineering, Inc. will distinguish these
routines and maps them to its own routine against these calls for direct porting of the user code to
its new environment supported by UGL-GRAPHICS.
What is GKS?
GKS (Graphical Kernel System) is an ANSI and ISO standard. GKS standardizes two-dimensional
graphics functionality at a relatively low level. The primary purposes of the standard are:
- To provide for portability of gragphics application programs.
- To aid in the understanding of graphics method by application programmers.
- To provide guidelines for manufacturers in describing useful graphics capabilities.
The GKS (as described on the actual standard document: Computer Graphics - Graphical Kernel
System (GKS) Functional Description, ANSI X3.124-1985) consists of three basic parts:
- An informal exposition of the contents of the standard which includes such things as how text is
positioned, how polygonal areas to be filled, and so forth.
- A formalization of the expository material in 1. by way of abstracting the ideas into discrete
functional descriptions. These functional descriptions such as description contain such information
as descriptions of input and output parameters, precise descriptions of the effect each function
should have, references into the expository material in 1., and a description of error conditions.
The functional descriptions in this section are language independent.
- Language bindings. These bindings are an implementation of the abstract functions described in
2. in a specific computer language such as FORTRAN or Ada or C.
GKS stratifies its functionality into twelve functional levels, depending on the complexity of the
graphical input and output. There are four levels of output (m,0,1,2) and three levels of input
(A,B,C). GKS contains a full implementation of GKS FORTRAN at level 0A.
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The above content is Copyright © by Galaxy Advanced Engineering, Inc.
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