SDL Wiki
(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)


Set the size of a window's client area.


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

Function Parameters

window the window to change
w the width of the window in pixels, in screen coordinates, must be > 0
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.


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