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


Get the size of a window's underlying drawable in pixels.

Header File

Defined in SDL_video.h


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

Function Parameters

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


This returns info useful for calling glViewport().

This may differ from SDL_GetWindowSize() if we're rendering to a high-DPI drawable, i.e. the window was created with SDL_WINDOW_ALLOW_HIGHDPI on a platform with high-DPI support (Apple calls this "Retina"), and not disabled by the SDL_HINT_VIDEO_HIGHDPI_DISABLED hint.


This function is available since SDL 2.0.1.

See Also

CategoryAPI, CategoryAPIFunction, CategoryVideo

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