Man page - sdl_getprimarydisplay(3)

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Package: libsdl3-doc
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SDL_GetPrimaryDisplay - Return the primary display.

Defined in SDL3/SDL_video.h

#include "SDL3/SDL.h"

SDL_DisplayID SDL_GetPrimaryDisplay(void);

( SDL_DisplayID ) Returns the instance ID of the primary display on success or 0 on failure; call SDL_GetError () for more information.

This function should only be called on the main thread.

This function is available since SDL 3.2.0.