---
name: "SDL_BlitSurfaceUnchecked"
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_BlitSurfaceUnchecked"
---

# SDL\_BlitSurfaceUnchecked(3)

Perform low-level surface blitting only.

## NAME

SDL\_BlitSurfaceUnchecked - Perform low-level surface blitting only.

## HEADER FILE

Defined in SDL3/SDL\_surface.h

## SYNOPSIS

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

**bool SDL\_BlitSurfaceUnchecked(SDL\_Surface \*src, const SDL\_Rect \*srcrect, SDL\_Surface \*dst, const SDL\_Rect \*dstrect);**

## DESCRIPTION

This is a semi-private blit function and it performs low-level surface blitting, assuming the input rectangles have already been clipped.

## FUNCTION PARAMETERS

- *src*

  the  **SDL\_Surface**\
    structure to be copied from.

- *srcrect*

  the  **SDL\_Rect**\
    structure representing the rectangle to be copied, may not be NULL.

- *dst*

  the  **SDL\_Surface**\
    structure that is the blit target.

- *dstrect*

  the  **SDL\_Rect**\
    structure representing the target rectangle in the destination surface, may not be NULL.

## RETURN VALUE

Returns true on success or false on failure; call

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

## THREAD SAFETY

Only one thread should be using the **src** and **dst** surfaces at any given time.

## AVAILABILITY

This function is available since SDL 3.2.0.

## SEE ALSO

**•**(3), [**SDL\_BlitSurface**(3)](/SDL_BlitSurface/3.md)