DIGRAF(ID:7875/)
for Device Independent GRAphics from FORTRAN
Fortran extension to permit device independent modelling and CAD
Related languages
References:
Warner, J., "DIGRAF User's Reference Guide," University of Colorado Computing Center, Boulder, CO, 80309. view details
Warner, James R.; Polisher, Margaret A.; Kopolow, Robert N. "DIGRAF?a FORTRAN implementation of the proposed GSPC standard" pp301-307 view details
Abstract: A machine-independent FORTRAN implementation of the GSPC proposed standard is presented. DIGRAF (Device Independent GRAphics from FORTRAN) has been designed to closely parallel level-3 of the 'CORE' system. The present implementation allows portability to any computer with a FORTRAN compiler and a word length of at least 16-bits. Several CORE system design issues are discussed from the implementor's viewpoint. A breakdown of the functional modules reinforces the portability aspects. Special features of the user interface are presented. A storage structure for retained segments is presented with a review of the memory management alternatives. The device-dependent interface for two common classes of devices is discussed. Finally, the design and data structure techniques used to implement several CORE functions is presented.
in Phillips, Richard L. editor, Computer Graphics (SIGGRAPH 78 Conference Proceedings), volume 12, ACM SIGGRAPH, August 1978 view details
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