2005 Sams Publishing
glGetQueryiv 3G
glGetQueryiv return parameters of a query object target

## C Specification

void `glGetQueryiv` GLenum target GLenum pname GLint * params

## Parameters

target

  Specifies a query object target. Must be `GL_SAMPLES_PASSED`.

pname

  Specifies the symbolic name of a query object target parameter. Accepted values are `GL_CURRENT_QUERY` or `GL_QUERY_COUNTER_BITS`.

params

  Returns the requested data.

## Description

`glGetQueryiv` returns in params a selected parameter of the query object target specified by target.

pname names a specific query object target parameter. When target is `GL_SAMPLES_PASSED`, pname can be as follows:

`GL_CURRENT_QUERY`

  params returns the name of the currently active occlusion query object. If no occlusion query is active, 0 is returned. The initial value is 0.

`GL_QUERY_COUNTER_BITS`

  params returns the number of bits in the query counter used to accumulate passing samples. If the number of bits returned is 0, the implementation does not support a query counter, and the results obtained from glGetQueryObject are useless.

## Notes

If an error is generated, no change is made to the contents of params.

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

## Errors

`GL_INVALID_ENUM` is generated if target or pname is not an accepted value.

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

## See Also

glGetQueryObject, glIsQuery

## 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/.