GTK2 doesn't "scale" at all, so whatever is making it blurry on your computer isn't that. Probably you've got a desktop that's trying too hard to scale things.

GTK2 doesn't "scale" at all, so whatever is making it blurry on your computer isn't that. Probably you've got a desktop that's trying too hard to scale things. I hate blurriness so I turn all "scaling" off and just set my screen DPI to its real physical value (Xorg, criminally, lies to apps and says it's 96 by default - I force it in .xinitrc with xrandr). DPI-aware apps Just Work, and if it uses raw pixels, it just looks small. I believe for GTK2 you can load a pre-scaled theme, which will solve the too-small thing. Scaling is evil. DPI is the one true king.