Image processing apparatus and method

An image processing apparatus for performing rendering by receiving polygon rendering data including three-dimensional coordinates (x, y, z), R (red), G (green), and B (blue) data, a blending coefficient α, homogeneous coordinates (s, t) of texture, and homogeneous term q with respect to each vertex of the unit graphic, at least comprising:

• a storage circuit for storing display image data and texture data required by at least one graphic element;
• a drawing data control circuit for finding data on the amount of update of present image data to be drawn from image data already stored in the storage circuit using a given blending coefficient α, finding the data comprised of noise data added to the image data stored in the storage circuit, adding the two obtained data to find data comprised of the noise data added to data obtained by linear interpolation of two colors, extracting valid value of color from the data, thinning out the extracted data, and writing back the same to the storage circuit;
• an interpolation data generation circuit for interpolating polygon rendering data of vertexes of the unit graphic and generating interpolation data of pixels positioned inside the unit graphic;
• and
• a texture processing circuit for dividing homogeneous coordinates (s, t) of texture included in the interpolation data by a homogeneous term q to generate division results “s/q” and “t/q”, using texture data corresponding to the division results “s/q” and “t/q” to read texture data from the storage circuit, and performing processing for applying the texture data to the surface of a graphic element of the display use image data;
• said storage circuit, said drawing data control circuit, said interpolation data generation circuit, and said texture processing circuit being accommodated in one semiconductor chip.