Patent ID: 6965382

Claim:
A graphic image rendering apparatus comprising: a working memory, which is an internal memory; a rendering information generation portion that generates rendering parameters corresponding to X and Y coordinates of pixels constituting a graphic image; a plurality of pixel calculation portions that, in a first stage, for each pixel make a selection as appropriate from the rendering parameters, a constant and working data, which are pixel data in a working memory that correspond to coordinates of a pixel currently processed, to perform a calculation, and in stages following the first stage make a selection as appropriate from the rendering parameters, the constant, a calculation result of the prior stage(s) and the working data to perform a calculation; a working memory interface portion that reads the working data from the working memory and writes a calculation result of the pixel calculation portion of the last stage into the working memory; and a frame memory interface portion that writes only a calculation result of the pixel calculation portion of the last stage into the frame memory, wherein the smallest X and Y coordinates of a rectangle circumscribing the graphic image to be rendered are taken as an origin in the working memory, and the working memory interface portion accesses the working memory after converting coordinates of the frame memory into coordinates of the working memory.