Appeal No. 1998-0414
Application 08/202,422
graphic management facility receives graphic element data,
including data specifying, for example, line width, etc., from
the application program and stores the graphic element data
into memory. When a draw request is input from the
application program, the stored data are retrieved, and screen
drawing is performed by sending an attribute specifying
command and a draw command to the display device. Instead of
outputting an attribute specifying command prior to a draw
command each time the command is invoked, the graphic
management facility outputs an attribute specifying command
only when the attributes of the graphic element to be output
are different from those of the previously output graphic
element. However, the prior art described graphic management
facility requires that the attribute data be compared each
time the graphic element data are retrieved from memory. When
processing a large number of line drawing data generated in a
computer aid design system, a large amount of time is required
for comparison, which is a major obstacle in speeding up the
drawing process.
The present invention solves this problem by
providing a graphic display method and an apparatus which
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