1. A computer graphics processor, having a forward mapping renderer, comprising: a texture space rasterizer configured to rasterize a primitive in texture space, a color generating unit configured to determine the color of the output of the texture space rasterizer and configured to forward a color sample along with coordinates, a 2-pass screen space resampler configured to resample the color sample determined by the color generating unit, and at least one one-dimensional blur filter unit associated to at least one pass of said 2-pass screen space resampler configured to perform a one-dimensional blur filtering before performing said at least one pass, wherein the at least one one-dimensional blur filter unit comprises a first one- dimensional blur filter unit and a second one-dimensional blur filter unit, and said first and second blur filter units have respective footprints with a size depending on a corresponding shear factor.