<s>
VOGL	B-Language
is	O
a	O
debugger	B-Application
for	O
the	O
OpenGL	B-Application
rendering	O
API	O
intended	O
to	O
be	O
used	O
in	O
the	O
development	O
of	O
video	O
games	O
.	O
</s>
<s>
VOGL	B-Language
was	O
originally	O
written	O
at	O
RAD	B-Algorithm
Game	I-Algorithm
Tools	I-Algorithm
and	O
Valve	O
.	O
</s>
<s>
VOGL	B-Language
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
subject	O
to	O
the	O
terms	O
of	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
VOGL	B-Language
was	O
initially	O
released	O
with	O
support	O
for	O
Linux	B-Application
operating	I-Application
systems	I-Application
only	O
,	O
but	O
on	O
April	O
23	O
,	O
2014	O
,	O
additional	O
support	O
for	O
Microsoft	B-Application
Windows	I-Application
was	O
released	O
.	O
</s>
<s>
VOGLperf	O
is	O
a	O
benchmarking	O
tool	O
for	O
Linux	B-Operating_System
OpenGL	B-Application
games	O
.	O
</s>
