SDL_GetDisplays - Man Page

#include <SDL3/SDL_video.h>

SDL_DisplayID * SDL_GetDisplays(int *count);

count

a pointer filled in with the number of displays returned, may be NULL.

Returns a 0 terminated array of display instance IDs or NULL on failure; call SDL_GetError() for more information. This should be freed with SDL_free() when it is no longer needed.

This function should only be called on the main thread.

This function is available since SDL 3.2.0.

SDL_GetClosestFullscreenDisplayMode(3), SDL_GetCurrentDisplayMode(3), SDL_GetCurrentDisplayOrientation(3), SDL_GetDesktopDisplayMode(3), SDL_GetDisplayBounds(3), SDL_GetDisplayContentScale(3), SDL_GetDisplayForPoint(3), SDL_GetDisplayForRect(3), SDL_GetDisplayForWindow(3), SDL_GetDisplayName(3), SDL_GetDisplayUsableBounds(3), SDL_GetFullscreenDisplayModes(3), SDL_GetNaturalDisplayOrientation(3), SDL_GetPrimaryDisplay(3).