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GLGETQUERYOBJECT(3G)                             OpenGL 3.3                             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 (C) 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/.



OpenGL 3.3                                       03/08/2011                             GLGETQUERYOBJECT(3G)