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GLGETQUERYOBJECT(3G)		 OpenGL Manual		  GLGETQUERYOBJECT(3G)

NAME
       glGetQueryObject - return parameters of a query object

C SPECIFICATION
       void glGetQueryObjectiv(GLuint id, GLenum pname, GLint * params);

       void glGetQueryObjectuiv(GLuint id, GLenum pname, GLuint * params);

       void glGetQueryObjecti64v(GLuint id, GLenum pname, GLint64 * params);

       void glGetQueryObjectui64v(GLuint id, GLenum pname, GLuint64 * params);

PARAMETERS
       id
	   Specifies the name of a query object.

       pname
	   Specifies the symbolic name of a query object parameter. Accepted
	   values are GL_QUERY_RESULT or GL_QUERY_RESULT_AVAILABLE.

       params
	   Returns the requested data.

DESCRIPTION
       glGetQueryObject returns in params a selected parameter of the query
       object specified by id.

       pname names a specific query object parameter.  pname can be as
       follows:

       GL_QUERY_RESULT
	   params returns the value of the query object's passed samples
	   counter. The initial value is 0.

       GL_QUERY_RESULT_AVAILABLE
	   params returns whether the passed samples counter is immediately
	   available. If a delay would occur waiting for the query result,
	   GL_FALSE is returned. Otherwise, GL_TRUE is returned, which also
	   indicates that the results of all previous queries are available as
	   well.

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

       glGetQueryObject implicitly flushes the GL pipeline so that any
       incomplete rendering delimited by the occlusion query completes in
       finite time.

       If multiple queries are issued using the same query object id before
       calling glGetQueryObject, the results of the most recent query will be
       returned. In this case, when issuing a new query, the results of the
       previous query are discarded.

       glGetQueryObjecti64v and glGetQueryObjectui64v are available only if
       the GL version is 3.3 or greater.

ERRORS
       GL_INVALID_ENUM is generated if pname is not an accepted value.

       GL_INVALID_OPERATION is generated if id is not the name of a query
       object.

       GL_INVALID_OPERATION is generated if id is the name of a currently
       active query object.

SEE ALSO
       glBeginQuery(), glEndQuery(), glGetQueryiv(), glIsQuery(),
       glQueryCounter()

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/.

AUTHORS
       opengl.org

opengl.org			  04/29/2014		  GLGETQUERYOBJECT(3G)

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