---
name: "SDL_ConvertEventToRenderCoordinates"
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_ConvertEventToRenderCoordinates"
---

# SDL\_ConvertEventToRenderCoordinates(3)

Convert the coordinates in an event to render coordinates.

## NAME

SDL\_ConvertEventToRenderCoordinates - Convert the coordinates in an event to render coordinates.

## HEADER FILE

Defined in SDL3/SDL\_render.h

## SYNOPSIS

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

**bool SDL\_ConvertEventToRenderCoordinates(SDL\_Renderer \*renderer, SDL\_Event \*event);**

## DESCRIPTION

This takes into account several states:

• The window dimensions.

• The logical presentation settings\
   ( **SDL\_SetRenderLogicalPresentation** )

• The scale ( **SDL\_SetRenderScale** )

• The viewport ( **SDL\_SetRenderViewport** )

Various event types are converted with this function: mouse, touch, pen, etc.

Touch coordinates are converted from normalized coordinates in the window to non-normalized rendering coordinates.

Relative mouse coordinates (xrel and yrel event fields) are \_also\_ converted. Applications that do not want these fields converted should use

**SDL\_RenderCoordinatesFromWindow** () on the specific event fields instead of converting the entire event structure.

Once converted, coordinates may be outside the rendering area.

## FUNCTION PARAMETERS

- *renderer*

  the rendering context.

- *event*

  the event to modify.

## RETURN VALUE

Returns true on success or false 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.

## SEE ALSO

**•**(3), [**SDL\_RenderCoordinatesFromWindow**(3)](/SDL_RenderCoordinatesFromWindow/3.md)