---
name: "glClientActiveTextureARB"
section: "3x"
platform: "linux"
package: "xlibmesa-gl-dev"
version: "4.3.0.dfsg.1-14sarge7"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/glClientActiveTextureARB"
---

# glClientActiveTextureARB(3x)

select active texture unit

## NAME

**glClientActiveTextureARB** - select active texture unit

## C SPECIFICATION

void **glClientActiveTextureARB**( GLenum *texture* )

```

```

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## PARAMETERS

- *texture*

  Specifies which texture unit to make active. The number of texture units is implementation dependent, but must be at least two. *texture* must be one of **GL\_TEXTURE**$i$**\_ARB** where 0 ≤ $ i $ \< **GL\_MAX\_TEXTURE\_UNITS\_ARB**, which is an implementation-dependent value.  The initial value is  **GL\_TEXTURE0\_ARB**.

## DESCRIPTION

**glClientActiveTextureARB** selects the vertex array client state parameters to be modified by **glTexCoordPointer**, and enabled or disabled with **glEnableClientState** or **glDisableClientState**, respectively, when called with a parameter of **GL\_TEXTURE\_COORD\_ARRAY**.

## NOTES

**glClientActiveTextureARB** is supported only if **GL\_ARB\_multitexture** is included in the string returned by **glGetString** when called with the argument **GL\_EXTENSIONS**.

**glClientActiveTextureARB** sets **GL\_CLIENT\_ACTIVE\_TEXTURE\_ARB** to the active texture unit.

## ERRORS

**GL\_INVALID\_ENUM** is generated if *texture* is not one of **GL\_TEXTURE**$i$**\_ARB**, where 0 ≤ $ i $ \< **GL\_MAX\_TEXTURE\_UNITS\_ARB**.

## SEE ALSO

**glActiveTextureARB(3G)**, **glDisableClientState(3G)**, **glEnableClientState(3G)**, **glMultiTexCoordARB(3G)**, **glTexCoordPointer(3G)**