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Graphics Interchange Format  |  1997-01-13  |  47.9 KB  |  478x293  |  4-bit (16 colors)
   ocr: Polygon A Spans Xw20, yo, count=0 X-20.y-1, coumt =1 X19.y-2, count: -2 X=19, ye3, count 2 X=18, ye4, count =4 X-18, ye5, count 44 X=17, ye6, count 5 X=22, y=7, count=0 Figure 1: Span generation.