Next: 10 Font Rendering Up: 9 State Retrieval Previous: 9.4 glutGetModifiers

## 9.5 glutExtensionSupported

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

Usage

    int glutExtensionSupported(char *extension);

`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`.

Next: 10 Font Rendering Up: 9 State Retrieval Previous: 9.4 glutGetModifiers