---
name: "glutExtensionSupported"
section: "3"
platform: "linux"
package: "freeglut"
version: "3.8.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/glutExtensionSupported"
---

# glutExtensionSupported(3)

helps to easily determine whether a given OpenGL extension is supported.

## NAME

glutExtensionSupported - helps to easily determine whether a given OpenGL extension is supported.

## SYNTAX

```

```

int glutExtensionSupported(char \*extension);

## ARGUMENTS

- *extension*

  Name of OpenGL extension.

## DESCRIPTION

glutExtensionSupported helps to easily determine whether a given OpenGL extension is supported or not. The extension parameter names the extension to query. The supported extensions can also be determined with glGetString(GL\_EXTENSIONS), but glutExtensionSupported does the correct parsing of the returned string.

glutExtensionSupported returns non-zero if the extension is supported, zero if not supported.

There must be a valid current window to call glutExtensionSupported.

glutExtensionSupported only returns information about OpenGL extensions only. This means window system dependent extensions (for example, GLX extensions) are not reported by glutExtensionSupported.

## EXAMPLE

Here is an example of using glutExtensionSupported:

```

```

  if (!glutExtensionSupported("GL\_EXT\_texture")) {\
     fprintf(stderr, "Missing the texture extension!\\n");\
     [exit(1)](/exit/1.md);\
   }

Notice that the name argument includes both the GL prefix and the extension family prefix (EXT).

## SEE ALSO

glutGet, glGetString

## AUTHOR

Mark J. Kilgard (mjk@nvidia.com)