On 10/10/2010 04:01, saulgoode@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx wrote: > Quoting Ofnuts<ofnuts@xxxxxxxxxxx>: > >> Is there a practical, fast way, to detect this case, i.e, that the >> selection covers the whole layer (or image?) and that no pixels remain >> unselected? I assume that inverting the selection again and testing for >> empty would work, but that would be two selection inversions in the >> normal case and that may be a bit costly. > The following appears to be about twice as fast as the two inversion approach. > > (let ((count (cdddr (gimp-histogram (car (gimp-image-get-selection image)) > HISTOGRAM-VALUE > 255 > 255)))) > (= (car count) (cadr count)) ; compare num of all pixels to all white pixels > ) Exactly what the doctor ordered. Thanks (and to Rob...). However, the only documentation I found of this function was in the API browser of the python-fu console. I couldn't find it in the files I sampled at <http://developer.gimp.org/api/2.0/index.html>. Where is it documented? -- Bertrand _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
