Efficient area description for raster displays

Details Efficient area description for raster displays Efficient area description for raster displays

1992-06-15

1994-08-23

Nguyen, Phu K.

G06F 1520

Patent

active

053414721

ABSTRACT:
An apparatus and method useful for the efficient display of images on a computer display screen a display area description language is provided for describing and manipulating portions of a raster display screen. The area description language is comprised of a set of instructions and masks that define the areas and manipulations for a particular display. The area description language is used to define the location, dimension and contents of areas within a logical display grid. Each area description command is comprised of three components. First, each command has an associated scan count. The scan count defines which scan line or lines will be operated upon by the command. Secondly, each command has at least one instruction. The command instruction is used to define the location and the dimension of the area being defined by the command. The third component that may or may not exist in each command is a mask. The mask is used to define the individual pixels that will be merged with a new source image to create a modified image within the area defined by command instruction.

REFERENCES:
patent: 5226112 (1993-07-01), Mensing et al.
patent: 5265204 (1993-11-01), Kimura et al.

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