# SDL_GetWindowDisplayScale

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

## Header File

Defined in [<SDL3/SDL_video.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_video.h)

## Syntax

```c
float SDL_GetWindowDisplayScale(SDL_Window *window);
```

## Function Parameters

|                            |            |                      |
| -------------------------- | ---------- | -------------------- |
| [SDL_Window](SDL_Window) * | **window** | the window to query. |

## Return Value

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

## Remarks

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.

## Thread Safety

This function should only be called on the main thread.

## Version

This function is available since SDL 3.2.0.

----
[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryVideo](CategoryVideo)

