Graphic accelerator with interpolate function

摘要

A graphic accelerator includes an image-forming data decode unit, an image memory control unit and a screen data generation unit. The image memory control unit performs a control for writing an output of the image-forming data decode unit to a frame buffer and reading out information stored in the frame buffer. Screen data generation unit restores (interpolates) the color information based on the data read out from the frame buffer and generates screen data. In the frame buffer the information for each pixel is stored in a deleted form including two types of color information among three types of color information consisting of R, G and B. At the reading, the deleted color information is interpolated with the color information of other pixel.