2012/11/27 Bill Spitzak <spit...@gmail.com>: > Cairo may want to pre-scale the source surface by an integer factor using a > box filter so that the sampling filters are not so large. It would then have > to keep this scaled image around until either the source image is dirtied or > a transform requiring a different scale is used. I would think this could > speed up repeated drawing of a much-scaled-down image considerably. It does > seem to me that such a step should be done by cairo rather than pixman. The > alternative is for client programs to do this with extra Cairo surfaces for > the scaled images, but that seems to not be keeping with the easy-to-use api > intentions of Cairo.
Why not go a little further and implement mipmaps? This would dramatically speed up the case where an image is repeatedly drawn with very different transformations, e.g. as is the case when transforming a bitmap in Inkscape. I guess this would need some support from Pixman, however. Regards, Krzysztof _______________________________________________ Pixman mailing list Pixman@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pixman