SDL_GetWindowPixelDensity - Get the pixel density of a window.

       This function is available since SDL 3.2.0.

       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.

window the window to query.

       SDL_GetWindowPixelDensity - Get the pixel density of a window.

       for more information.

SDL_GetWindowDisplayScale(3)

Simple Directmedia Layer                           SDL 3.2.20                       SDL_GetWindowPixelDensity(3)

#include<SDL3/SDL_video.h>floatSDL_GetWindowPixelDensity(SDL_Window*window);

       This function should only be called on the main thread.