How to get screen size in SDL

Question

I\'m trying to make a program using SDL and C++. How can I get screen\'s width and height in pixels in SDL?I\'m trying to get screen\'s width not the window\'s width.

Answer 1

In SDL2, use SDL_GetCurrentDisplayMode or SDL_GetDesktopDisplayMode depending on your needs. Usage example:

SDL_DisplayMode DM;
SDL_GetCurrentDisplayMode(0, &DM);
auto Width = DM.w;
auto Height = DM.h;

On high-DPI displays this will return the virtual resolution, not the physical resolution.

From the SDL2 wiki:

There's a difference between [SDL_GetDesktopDisplayMode()] and SDL_GetCurrentDisplayMode() when SDL runs fullscreen and has changed the resolution. In that case [SDL_GetDesktopDisplayMode()] will return the previous native display mode, and not the current display mode.