2005 Sams Publishing
glIsQuery 3G
glIsQuery determine if a name corresponds to a query object

## C Specification

GLboolean `glIsQuery` GLuint id

## Parameters

id

  Specifies a value that may be the name of a query object.

## Description

`glIsQuery` returns `GL_TRUE` if id is currently the name of a query object. If id is zero, or is a non-zero value that is not currently the name of a query object, or if an error occurs, `glIsQuery` returns `GL_FALSE`.

A name returned by glGenQueries, but not yet associated with a query object by calling glBeginQuery, is not the name of a query object.

## Notes

`glIsQuery` is available only if the GL version is 1.5 or greater.

## Errors

`GL_INVALID_OPERATION` is generated if `glIsQuery` is executed between the execution of glBegin and the corresponding execution of glEnd.

## See Also

glBeginQuery, glDeleteQueries, glEndQuery, glGenQueries

## Copyright

Copyright 2005 Addison-Wesley. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.