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 content display scale relative to a window's pixel size.


float SDL_GetWindowDisplayScale(SDL_Window *window);

Function Parameters

window the window to query

Return Value

Returns the display scale, or 0.0f on failure; call SDL_GetError() for more information.


This is a combination of the window pixel density and the display content scale, and is the expected scale for displaying content in this window. For example, if a 3840x2160 window had a display scale of 2.0, the user expects the content to take twice as many pixels and be the same physical size as if it were being displayed in a 1920x1080 window with a display scale of 1.0.

Conceptually this value corresponds to the scale display setting, and is updated when that setting is changed, or the window moves to a display with a different scale setting.


This function is available since SDL 3.0.0.


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