###### (This is the legacy documentation for stable SDL2, the current stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current development version.) # SDL_GetWindowBrightness Get the brightness (gamma multiplier) for a given window's display. ## Syntax ```c float SDL_GetWindowBrightness(SDL_Window * window); ``` ## Function Parameters | | | | -------------- | ---------------------------------------------------------------------- | | **window** | the window used to select the display whose brightness will be queried | ## Return Value Returns the brightness for the display where 0.0 is completely dark and 1.0 is normal brightness. ## Remarks Despite the name and signature, this method retrieves the brightness of the entire display, not an individual window. A window is considered to be owned by the display that contains the window's center pixel. (The index of this display can be retrieved using [SDL_GetWindowDisplayIndex](SDL_GetWindowDisplayIndex)().) ## Version This function is available since SDL 2.0.0. ## Related Functions * [SDL_SetWindowBrightness](SDL_SetWindowBrightness) ---- [CategoryAPI](CategoryAPI)