SDL_SetWindowSize

Set the size of a window's client area.

Header File

void SDL_SetWindowSize(SDL_Window * window, int w,
                       int h);

SDL_Window *	window	the window to change.
int	w	the width of the window in pixels, in screen coordinates, must be > 0.
int	h	the height of the window in pixels, in screen coordinates, must be > 0.

The window size in screen coordinates may differ from the size in pixels, if the window was created with SDL_WINDOW_ALLOW_HIGHDPI on a platform with high-dpi support (e.g. iOS or macOS). Use SDL_GL_GetDrawableSize() or SDL_GetRendererOutputSize() to get the real client area size in pixels.

Fullscreen windows automatically match the size of the display mode, and you should use SDL_SetWindowDisplayMode() to change their size.

This function is available since SDL 2.0.0.