bugle-error - detect errors in OpenGL calls
This filter-set does not take any visible action on its own, but provides a
service to other filter-sets. It calls glGetError
(3) after every OpenGL
call to detect OpenGL errors (it does not detect X errors).
Usually you will not need to explicitly load this filter-set; if you want to be
informed of OpenGL errors, either use the showerror filterset, or
(1). However, you may occasionally see the message
An OpenGL error was detected but will be lost to the application.
This means that bugle´s internal error-checking code accidentally
collected an error caused by one of your calls, and thus if your application
later called glGetError
(3) it would not be informed of the error.
However, if you add the error filter-set, it will catch the error first and
your application will be correctly informed of the error.
Because the error reporting semantics of OpenGL are not completely defined (in
particular, an implementation may choose how many error flags it has), it is
impossible to guarantee that this filter-set is completely transparent to the
application. However, the first call to glGetError
(3) always return an
error, and in practice this is all that is necessary.
bugle is written and maintained by Bruce Merry.