| 摘要 |
<p>A new permutation bit map architecture is described for flexible cellular addressing, image creation, and frame buffer control in raster graphics machines (10). A new frame buffer address generator (15) and address circuitry (20) accesses frame buffer memory (12) locations with different word and cell configuration addressing modes to increase performance and efficiency. A new graphics image data generator (16) creates, modifies, and updates graphics image data in the frame buffer memory locations accessed by the multiple addressing mode word and cell configurations of the address generator (15) and address circuitry (20). The graphics image data generator (22) provides vector drawing, polygon filling, ''Bit Blt's'' or bit block transfers, alignment and masking of graphics image data, and refresh display of a raster view surface. Vector drawing is achieved with greatly increased performance because of the multiple cellular addressing modes of the addressing circuitry (20).</p> |
