Hey, I recently stumbled across your project because I am currently fiddling around with emulators myself and got to say, that I really like your simple, clean interface :) Just wanted to recommend setting the SDL_HINT_RENDER_SCALE_QUALITY hint to 'nearest' instead of 'linear' which (on my opinion) looks way better when upscaling the window.
Objectively, you're probably right, but I grew up using emulators that did the upscaling with a linear filter... So I kinda like the effect for (personal) nostalgic reasons. Sorry!
Hey, I recently stumbled across your project because I am currently fiddling around with emulators myself and got to say, that I really like your simple, clean interface :) Just wanted to recommend setting the SDL_HINT_RENDER_SCALE_QUALITY hint to 'nearest' instead of 'linear' which (on my opinion) looks way better when upscaling the window.