slab: 1. n. A continuous horizontal
line of pixels, all with the same color.
2. vi. To paint a slab on an
output device. Apple's QuickDraw, like most other professional-level
graphics systems, renders polygons and lines not with Bresenham's
algorithm, but by calculating slab
points for each scan line on the screen in succession, and then
slabbing in the actual image pixels.