SELECTION OF A MIPMAP LEVEL

摘要

A computer graphics includes a texture memory (134) storing texture maps in a mipmap structure. texels in a texture map being specified by a pair of u and v coordinates. A rasterizer (120) determines for a texel (u, v) corresponding initial 4D mipmap levels (mmlu, mmlv) and a magnification factor representing a magnification that occurs when the texel is mapped to a corresponding pixel position on the display. It then determines final 4D mipmap levels in dependence on the determined initial 4D mipmap levels mmlu, mmlv, and the magnification factor. A texture space resampler (132) obtains texture data from a texture map identified by the pair off final 4D mipmap levels. A texture mapper (140) maps the obtained texture data to corresponding pixel data defining the display image.