Method an apparatus for optimizing selected raster operations

Details Method an apparatus for optimizing selected raster operations Method an apparatus for optimizing selected raster operations

G - Physics

06

F

354/137, 354/230

G06F 7/38 (2006.01) G06T 17/00 (2006.01) G09G 5/393 (2006.01)

Patent

CA 1306064

ABSTRACT Circuitry for performing high speed operations on certain Boolean raster operations in a workstation whose functions include the display of graphics images using multiple planes and having foreground and background colors. The invented circuitry includes a logic circuit for determining whether a particular Boolean raster operation is one for which the high speed operation is available. A Boolean raster operation is determined to be available for high speed operation if the outcome of the operation can be determined by reading only one operand, namely the source data. If the other operand, namely the destination data, is needed to determine the outcome if the operation, then the operation is performed normally. Otherwise, the operation may be performed by reading the source data only.

601067

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