SDL Wiki
(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Get the output size in screen coordinates of a rendering context.


int SDL_GetRenderWindowSize(SDL_Renderer *renderer, int *w, int *h);

Function Parameters

renderer the rendering context
w a pointer filled in with the width in screen coordinates
h a pointer filled in with the height in screen coordinates

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.


This returns the true output size in screen coordinates, ignoring any render targets or logical size and presentation.


This function is available since SDL 3.0.0.


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