Get the size of a window's client area, in pixels.
int SDL_GetWindowSizeInPixels(SDL_Window *window, int *w, int *h);
|window||the window from which the drawable size should be queried|
|w||a pointer to variable for storing the width in pixels, may be NULL|
|h||a pointer to variable for storing the height in pixels, may be NULL|
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
This function is available since SDL 3.0.0.