On Mon, 02 Jun 2003 18:28:42 +0200, Sven Neumann <sven@xxxxxxxx> wrote: > Feczak Szabolcs <feczo@xxxxx> writes: > > Changing the color balance/brightens-contrast/ color curves are > > significantly slower in gimp vs. photoshop on the same machine. The > > problem is not the processing time alone, but the preview takes the > > same amount of time as the final processing. I have relized, that > > gimp calculates all the data in preview mode as I would have pressed > > the ok button. > > Very well spotted. > > [...] The problem is > indeed that the preview is implemented by doing the color > transformation on the full-size image data. [...] > > > Other good idea came from my friend: creating a smaller image in > > memory, which has the resolution of the screen and calculating the > > preview on that image. > > That is obviously the approach that should be taken. This is also the approach that is suggested in this enhancement proposal: http://bugzilla.gnome.org/show_bug.cgi?id=76096 Should we add a "donate" button in Bugzilla? :-) -Raphaël
