[Gimp-developer] Downscaling quality.

[Sven Neumann]

Hi,

On Wed, 2007-08-08 at 13:58 +0200, Geert Jordaens wrote:

> What would be a correctly designed filter for scaling down by factor 2?

I'd say the code in app/base/tile-pyramid.c, in particular
tile_pyramid_write_quarter() counts as a well-done and efficient filter
for this purpose.


Sven

PS: I am sure though that this code could be written more efficiently
using SIMD instructions. But I will leave that to be done for someone
else...