Signature
Parameters
Description
- 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 of the same type are available as well.
Notes
If an error is generated,
no change is made to the contents of
params
.
glGetQueryObjectuiv
implicitly flushes the GL pipeline so that any incomplete rendering
delimited by the occlusion query completes in finite time.
Repeatedly querying the
GL_QUERY_RESULT_AVAILABLE
state for any given query object is
guaranteed to return true eventually. Note that multiple queries to the same occlusion object may result in a
significant performance loss. For better performance it is recommended to wait N frames before querying this
state. N is implementation-dependent but is generally between one and three.
If multiple queries are issued using the same query object
id
before calling
glGetQueryObjectuiv
, 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.
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.
API Version Support
| glGetQueryObjectuiv |
See Also
Copyright
Copyright
2005 Addison-Wesley.
Copyright
2010-2014 Khronos Group.
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/
.
Sample Code References
The following code samples have been found which appear to reference the functions described here. Take care that the code may be old, broken or not even use PyOpenGL.
glGetQueryObjectuiv