SDL_GetWindowSize - Man Page

#include <SDL3/SDL_video.h>

bool SDL_GetWindowSize(SDL_Window *window, int *w, int *h);

The window pixel size may differ from its window coordinate size if the window is on a high pixel density display. Use SDL_GetWindowSizeInPixels() or SDL_GetRenderOutputSize() to get the real client area size in pixels.

window

the window to query the width and height from.

w

a pointer filled in with the width of the window, may be NULL.

h

a pointer filled in with the height of the window, may be NULL.

Returns true on success or false 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.

SDL_GetRenderOutputSize(3), SDL_GetWindowSizeInPixels(3), SDL_SetWindowSize(3)

SDL_GetWindowBordersSize(3), SDL_GetWindowSizeInPixels(3), SDL_SetWindowSize(3).