glQueryCounter â record the GL time into a query object after all previous commands have reached the GL server but have not yet necessarily executed.
void glQueryCounter( | GLuint id, |
| Â | GLenum target); |
id+ Specify the name of a query object into which to record the GL time. +
target
+ Specify the counter to query. target must be GL_TIMESTAMP.
+
+ glQueryCounter causes the GL to record the current time into the query object named id.
+ target must be GL_TIMESTAMP. The time is recorded after all previous commands on the
+ GL client and server state and the framebuffer have been fully realized. When the time is recorded, the query result for that object
+ is marked available. glQueryCounter timer queries can be used within a glBeginQuery /
+ glEndQuery block where the target is GL_TIME_ELAPSED and it does
+ not affect the result of that query object.
+
+ GL_INVALID_OPERATION is generated if id is the name
+ of a query object that is already in use within a glBeginQuery /
+ glEndQuery block.
+
+ GL_INVALID_VALUE is generated if id is not the name of a query object returned
+ from a previous call to glGenQueries.
+
+ GL_INVALID_ENUM is generated if target is not GL_TIMESTAMP.
+
+ glGenQueries, + glBeginQuery, + glEndQuery, + glDeleteQueries, + glGetQueryObject, + glGetQueryiv, + glGet +
+ Copyright © 2010 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/. +