| 摘要 |
PURPOSE:To perform thickened drawing at a high speed even for a contour graphic form including a high-degree curve by drawing a thickened contour of an optional graphic form based on contour coordinate information and contour coordinate information on a thickened graphic form and painting out the inside of said contour. CONSTITUTION:A main controller MPU 1 controls an entire part and performs graphic contour thickened drawing processing. A ROM 2 stores various control programs and a graphic contour thickened drawing program. A RAM 3 and an image memory IMEM 5 can evolve bit planes on them. A video memory VRAM 6 stores evolved data to be displayed in a CRT display part 7. A bit manipulation unit 8 can transfer data in DMA between input/output devices like the RAM 3, etc. The contour of a graphic form drawn on the bit plane of the image memory 5 is drawn by a circle of a thinned graphic form and the inside of this contour is painted out. Thus a thickened contour graphic form is obtained. In such a way, the thickened drawing is performed to a high speed. |
