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Display PostScript Operators

The PostScript Language Reference Manual, Second Edition, by Adobe Systems Incorporated, provides the specifications for standard PostScript and Display PostScript operators. Listed here are operators found in OpenStep but not in the standard implementation of the PostScript language.

Compositing Operators

	srcxsrcywidth height srcgstate
	destxdestyop	composite    -	Composites rectangle in source graphics state with image in current window.

	destxdestywidth height op	compositerect    -	Composites rectangle of current color and coverage with image in current graphics state.

	srcxsrcywidth height srcgstate
	destxdestydelta	dissolve    -	Dissolves between area of window referred to by srcgstate and equal area of window referred to by the current graphics state.

Graphics State Operators

	coverage	setalpha    -	Sets the current coverage.

	-	currentalpha    coverage	Returns the current coverage setting.