Get the pixel density of a window.
float SDL_GetWindowPixelDensity(SDL_Window *window);
|window||the window to query|
Returns the pixel density or 0.0f on failure; call SDL_GetError() for more information.
This is a ratio of pixel size to window size. For example, if the window is 1920x1080 and it has a high density back buffer of 3840x2160 pixels, it would have a pixel density of 2.0.
This function is available since SDL 3.0.0.