glIsQuery — determine if a name corresponds to a query object
GLboolean glIsQuery( | GLuint | id); |
glIsQuery returns GL_TRUE if id is currently the name of a query object. If id is zero, or is a non-zero value that is not currently the name of a query object, or if an error occurs, glIsQuery returns GL_FALSE.
A name returned by glGenQueries, but not yet associated with a query object by calling glBeginQuery, is not the name of a query object.
GL_INVALID_OPERATION is generated if glIsQuery is executed between the execution of glBegin and the corresponding execution of glEnd.
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