---
name: "SDL_GetWindowDisplayScale"
section: "3"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_GetWindowDisplayScale"
---

# SDL\_GetWindowDisplayScale(3)

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

## NAME

SDL\_GetWindowDisplayScale - Get the content display scale relative to a window's pixel size.

## HEADER FILE

Defined in SDL3/SDL\_video.h

## SYNOPSIS

```
#include "SDL3/SDL.h"
```

**float SDL\_GetWindowDisplayScale(SDL\_Window \*window);**

## DESCRIPTION

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.

## FUNCTION PARAMETERS

- *window*

  the window to query.

## RETURN VALUE

Returns the display scale, or 0.0f on failure; call

**SDL\_GetError** () for more information.

## THREAD SAFETY

This function should only be called on the main thread.

## AVAILABILITY

This function is available since SDL 3.2.0.