| 摘要 |
PROBLEM TO BE SOLVED: To improve the processing speed by deciding overlapping logic of images, setting a prescribed mask to the overlapping region, performing expansion processing of plotting data in a region, where the mask is not set and also changing the content of expansion processing, in accordance with the kind of the mask on the region where the mask is set. SOLUTION: When a logical deciding means 30 decides that image data are overwritten logical data at the receiving of the image data and storing it in a temporary storage memory 50, and also when a block boundary deciding means 40 decides that the data includes a memory block, a block logical address is recorded as a mask region on a mask area storage memory 60 and plotting data is recorded on the memory 50. The plotting data is expanded in an image data storage memory 80, after receiving has been finished. When a 2nd CPU decides that it is the data in the mask region, an object region is released and when it decides that it is not the data in the mask region, expansion processing is normally is performed. |
