I think you might be thinking of Cairo when used with one of the print backends, not GTK. GTK2 did not use float coordinates or support fractional rendering. Se

I think you might be thinking of Cairo when used with one of the print backends, not GTK. GTK2 did not use float coordinates or support fractional rendering. See for example here: https://developer-old.gnome.org/gtk2/2.24/GtkWidget.html#gtk-widget-set-size-request https://developer-old.gnome.org/gtk2/2.24/GtkWidget.html#gtk... https://developer-old.gnome.org/gtk2/2.24/GtkWidget.html#gtk-widget-queue-draw-area https://developer-old.gnome.org/gtk2/2.24/GtkWidget.html#gtk... Those would need to be floats if you wanted to have a non-integer scale. Changing everything to use float coordinates is a large undertaking that touches the whole stack and will require a lot of work. It still hasn't been done yet as of GTK4. If you'd like to spend your time helping out then please do so. Please refer to the gitlab comment above for a description of some of the technical issues that you would have to solve. But it may be more cost effective for you to just get some new hardware with a better GPU, or use something else.