On 09/01/2018 12:56 PM, Felix Miata wrote:
Is there a configuration option somewhere to have KSnapshot save .png images in 8-bit instead of 24-bit? 24-bit is a complete waste for desktop and window screenshots that include no photographs. I know many many moons ago, probably at least a decade, .png file sizes were much much smaller by default. Clicking the KSnapshot help button produces nothing but an hourglass.
Felix, Just use Alt+F2 "khelpcenter" Then khelpcenter will load fine with all the application help files. (somebody has messed up the khelpcenter path in kdebase (or kdelibs), I can't remember at the moment where that path is hardcoded -- but it is) Take a look: http://paste.opensuse.org/46335670 Unfortunately, I don't believe there is a color-depth setting for ksnapshot. ImageMagick can reduce the color-depth on the fly. I didn't find any option in the executable options either, e.g. $ ksnapshot --help-all Usage: ksnapshot [Qt-options] [KDE-options] [options] KDE Screenshot Utility <snip> --visual TrueColor forces the application to use a TrueColor visual on an 8-bit display <snip> (not what you wanted) Also, there is a pngquant project on github that does just what you need very well. (don't forget to download both pngquant and the lib folder, for libpngquant sources) before building. It does a fantastic job. You can clone the pngquant repo and then I just clicked on the lib@7dd2 folder and then downloaded the .zip into the original lib dir for pngquant, then it's just a: ./configure make Which produces the pngquant executable (that I then just copied to /usr/local/bin temporarily. Then $ pngquant 256 < khelpcenter.png > khelpcenter256.png For example the posted image on paste.opensuse.org is reduced from: -rw-r--r-- 1 david david 228711 Sep 3 03:35 khelpcenter.png -rw-r--r-- 1 david david 64774 Sep 3 04:04 khelpcenter256.png with NO discernible appearance!! Wohoo -- that's cool. Otherwise, use imagemagick, but the results are not as impressive: $ convert khelpcenter.png -colors 256 PNG8:khelpcenter256im.png -rw-r--r-- 1 david david 138971 Sep 3 04:10 khelpcenter256im.png I'll definitely be building pngquant in my home repo for suse when I get a few minutes to write out a .spec. -- David C. Rankin, J.D.,P.E. -- To unsubscribe, e-mail: opensuse-kde3+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kde3+owner@opensuse.org
