| 摘要 |
PURPOSE:To provide the straight line drawing device which draws a straight line at a high speed. CONSTITUTION:A drawing point quantity determination variable register 43 outputs a negative or nonnegative value at a specific period and specific frequency, a drawing point quantity determination variable and drawing point quantity control part 47 outputs the quotient (n) of the integral division of the numbers of (x)-axial and (y)-axis drawing points or a value n+1 according to the output value, and a horizontal line drawing part 51 draws a horizontal line of the number (n) or (n+1) of drawing points in each (y) coordinate value. Then the horizontal line is drawn at a time up to the coordinate point where the (x) coordinate and (y) coordinate vary at the same time, so the straight line is drawn at a high speed. |
