Hi, Modern filemanagers ( Dolphin / Gnome Files / Nemo / Thunar ) can display large thumbnail size, around 256x256 pixel max. But Krita save automatically for *.kra or *.ora a 128x128 thumbnail in them. Changing to 256x256 would have a little impact on the resulting file size ( normal 128x128 thumb is around 25KB, large 256x256 around 50KB ).
eww... Sorry. After inspection of the *.ora and *.kra files ; I saw Krita already save 256x256pixels thumbnails ... sorry , ex : ./krita/plugins/formats/ora/ora_converter.cc ( l.106 ) " previewSize.scale(QSize(256,256), Qt::KeepAspectRatio);" The issue I experienced with Krita's thumbnail then is not about the thumbnail amount of pixels, but the scaling quality : it's very aliased as it is now.
Git commit 3f5a95c78d46fa2d93c46d0ce0deb06f6567f53b by Boudewijn Rempt. Committed on 19/12/2013 at 12:49. Pushed by rempt into branch 'calligra/2.8'. Smoothscale the thumbnail for .kra files M +10 -2 krita/ui/kis_doc2.cc http://commits.kde.org/calligra/3f5a95c78d46fa2d93c46d0ce0deb06f6567f53b
Git commit 432cbe530d8583710754b045baadf0fb0d4e5e1b by Boudewijn Rempt. Committed on 19/12/2013 at 12:49. Pushed by rempt into branch 'master'. Smoothscale the thumbnail for .kra files M +10 -2 krita/ui/kis_doc2.cc http://commits.kde.org/calligra/432cbe530d8583710754b045baadf0fb0d4e5e1b