Get the size of a window's client area, in screen coordinates.
int SDL_GetWindowSize(SDL_Window *window, int *w, int *h);
|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 0 on success or a negative error code on failure; call SDL_GetError() for more information.
NULL can safely be passed as the
h parameter if the width or height value is not desired.
The window size in screen coordinates may differ from the size in pixels if the window is on a high density display (one with an OS scaling factor). Use SDL_GetWindowSizeInPixels() or SDL_GetRenderOutputSize() to get the real client area size in pixels.
This function is available since SDL 3.0.0.