| 摘要 |
PURPOSE:To perform a pixel operation without applying load on a picture processor, by providing a logic operation means, and a selection means. CONSTITUTION:The logic operation means (logic operation circuit 100) performs a logic operation based on a source data SD outputted from a straight line generating means (DDA37), and a destination data DD read out from a picture memory, setting them as inputs. The selection means (selector 2) inputs an arithmetic data OD outputted from the logic operation means 100, and the destination data DD read out from the picture memory 39, and also, outputs either data selectively corresponding to a control signal CS outputted from the DDA37, and supplies it to the picture memory 39. In such way, it is possible to write again the picture data in which the source data SD is written on the destination data DD, on the picture memory 39. |
