[net.graphics] CORE Raster Extensions

fisher@dvinci.DEC (Burns Fisher, MRO3-1/E13, 231-4108) (05/25/84)

As one of the implementors of DEC's Core Graphics System product, let me
comment on Bruce Cohen's mention of the raster extensions.  The raster
extensions provide for three major things:

	1)  Access to color/intensity lookup tables

	2)  A polygon primitive which can have several new attributes specifying
	    how it is to be filled,

	3)  Hidden lines and surfaces

These extensions are adequate for many purposes, but they don't and were not
intended to support things like imaging.  They certainly do not support
bit blits and that sort of thing.

Burns Fisher

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