Patent ID: 6239809
Filing Date: 2001-05-29
Classification: G06T

Abstract:
An image processing device having a rendering processing section for generating colour data for pixels which are to be displayed from polygon data including, at least, a polygon ID, positional co-ordinates data and parameters for generating colour data attributed thereto, said image processing device comprising:a polygon buffer memory for storing said polygon data; anda frame buffer memory for storing colour data for the pixels in a frame;wherein said rendering processing section comprises:a first processing section for generating Z values (depth values) indicating the depth in a screen of pixels in respective polygons, for a plurality of polygons located in said frame, and storing the Z values for pixels to be displayed on said screen and said polygon IDs corresponding thereto in a Z value buffer memory, in which the Z values for pixels in said frame are stored; anda second processing section for generating colour data from said parameters attributed to the polygon IDs stored in said Z value buffer memory, for each pixel in said frame;wherein said colour data for each pixel generated by said second processing section is stored in said frame buffer memory, and said colour data for each pixel is generated by said second processing section after each of said plurality of polygons located in said frame has been processed by the first processing section.