Making this an actual issue here so I can get around to doing something about it someday. It's been a pain in my ass since forever; people using ggez constantly ask why they get a 1200x900 pixel window when they ask for an 800x600 one, and how in the name of Eris they can turn it off.

Basically, if you are trying to make something pretty, you NEED to be able to actually get accurate information on where the hell pixels are, without things trying to hide it from you. The easiest way to do this is to actually just turn off any highdpi nonsense, rather than forcing the user to try to figure out everywhere they need to put in a conversion factor. Does hidpi scaling apply to location of mouse events, for example? I don't even know.

To demonstrate why this can be a problem, observe this program: https://github.com/icefoxen/heckin_dpi . You can turn on MSAA or such but you still get a jerky effect where the lines walk across the screen slightly out of sync with each other, even though the actual mathematical distance between the lines is always the same.