9. A system for filtering a font character bitmap represented as a texture map, comprising: a texture read request unit configured to read a coarsely aligned region of the font character bitmap; a font alignment engine configured to align the coarsely aligned region of the texture map with a font filter footprint and produce a finely aligned region of the font character bitmap; a font sample unit configured to compute font samples for portions of the finely aligned region of the font character bitmap, wherein the font samples indicate a percentage of texels that are within a font character represented by the font character bitmap; a bilinear filter engine configured to bilinearly interpolate the font samples to produce a bilinearly filtered font sample value for the finely aligned region of the font character bitmap; and computing a font coverage value for the finely aligned region of the font character bitmap by scaling the bilinearly filtered font sample value by a normalization factor.
9. A system for filtering a font character bitmap represented as a texture map, comprising: a texture read request unit configured to read a coarsely aligned region of the font character bitmap; a font alignment engine configured to align the coarsely aligned region of the texture map with a font filter footprint and produce a finely aligned region of the font character bitmap; a font sample unit configured to compute font samples for portions of the finely aligned region of the font character bitmap, wherein the font samples indicate a percentage of texels that are within a font character represented by the font character bitmap; a bilinear filter engine configured to bilinearly interpolate the font samples to produce a bilinearly filtered font sample value for the finely aligned region of the font character bitmap; and computing a font coverage value for the finely aligned region of the font character bitmap by scaling the bilinearly filtered font sample value by a normalization factor. 16. The system of claim 9 , further comprising a texture cache coupled to the read request unit and configured to store coarsely aligned regions of the texture map.