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Item A Means to Improve the GKS-3D/PHIGS Output Pipeline Implementation(Eurographics Association, 1987) Herman, Ivan; Reviczky, JanosThe output pipeline of GKS-3D/PHIGS isexamined to find some possible points where the implementation could be improved to raise efficiency while remaining strictly within the scope of the Standards. Some interesting results are presented in the paper which have led to a 25-30% improvement in speed when compared to a more conservative implementation.Item New Methods for Improving the GKS Fill Area Output Primitive(Blackwell Publishing Ltd and the Eurographics Association, 1987) Herman, Ivan; Reviczky, JanosThe fill area primitive is one of the most powerful primitives of GKS and its derivatives (GKS-3D, PHIGS etc.). Since its specrfication is extremely general, it is important to explore new approaches to achieve higher performance in its implementation. In this paper fast algorithms are presented for special situations, which can be included, together with appropriate tests, into a complete GKS output pipeline. As a result, a speed improvement With a factor of two may be achieved in important practical cases.