As far as I can see, fpImage has for StretchDraw only the TMitchelInterpolation.
The current implementation has a few drawbacks: - it creates a temporary image for resizing horizontally. If you have to resize big scanned images or gis data this makes trouble. - it computes all factors each time for every pixel - it seems to only support shrinking by up to a factor of two. I have written an interpolation that does not require a temporary image (only a small buffer for a few lines), pre computes the factors and supports any shrink factor. It is about 250 loc just like the TMitchelInterpolation, needs less memory and is about twice as fast. I will contribute it to fpImage. At the moment it uses a linear distribution for enlarging. I'm not yet sure if I should use the Mitchel distribution or a Gauss distribution. Maybe someone can give me some advice. Mattias _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal