<s>
OpenFX	B-Application
(	O
OFX	O
)	O
,	O
a.k.a.	O
</s>
<s>
The	O
OFX	O
Image	O
Effect	O
Plug-in	B-Application
API	O
,	O
is	O
an	O
open	O
standard	O
for	O
2D	O
visual	O
effects	O
or	O
compositing	O
plug-ins	B-Application
.	O
</s>
<s>
It	O
allows	O
plug-ins	B-Application
written	O
to	O
the	O
standard	O
to	O
work	O
on	O
any	O
application	O
that	O
supports	O
the	O
standard	O
.	O
</s>
<s>
The	O
OpenFX	B-Application
standard	O
is	O
owned	O
by	O
The	O
Open	O
Effects	O
Association	O
,	O
and	O
it	O
is	O
released	O
under	O
a	O
'	O
BSD	O
 '	O
open	O
source	O
license	O
.	O
</s>
<s>
OpenFX	B-Application
was	O
originally	O
designed	O
by	O
Bruno	O
Nicoletti	O
at	O
The	O
Foundry	O
Visionmongers	O
.	O
</s>
<s>
Plug-ins	B-Application
are	O
written	O
as	O
dynamic	B-Application
shared	I-Application
objects	I-Application
,	O
and	O
the	O
API	O
specifies	O
a	O
few	O
entry	B-Language
points	I-Language
that	O
must	O
be	O
implemented	O
by	O
the	O
plug-in	B-Application
.	O
</s>
<s>
The	O
OpenFX	B-Application
host	O
exposes	O
sets	O
of	O
entry	B-Language
points	I-Language
to	O
the	O
plug-in	B-Application
,	O
called	O
suites	O
.	O
</s>
<s>
The	O
Property	O
Suite	O
is	O
used	O
to	O
manage	O
attribute-value	B-Application
pairs	I-Application
attached	O
to	O
objects	O
defined	O
by	O
all	O
other	O
suites	O
of	O
the	O
API	O
,	O
the	O
Image	O
Effect	O
Suite	O
is	O
used	O
to	O
fetch	O
film	O
frames	O
from	O
the	O
inputs	O
or	O
the	O
output	O
of	O
the	O
effect	O
,	O
and	O
there	O
are	O
other	O
suites	O
to	O
display	O
informative	O
messages	O
or	O
ask	O
questions	O
to	O
the	O
user	O
,	O
handle	O
multithreading	B-Operating_System
,	O
use	O
OpenGL	B-Application
for	O
processing	O
,	O
etc	O
.	O
</s>
<s>
Each	O
plugin	B-Application
is	O
described	O
by	O
a	O
list	O
of	O
parameters	O
and	O
supported	O
inputs	O
and	O
output	O
.	O
</s>
<s>
Optionally	O
,	O
the	O
plug-in	B-Application
may	O
also	O
display	O
graphical	O
information	O
over	O
the	O
current	O
frame	O
using	O
OpenGL	B-Application
,	O
and	O
propose	O
interactions	O
using	O
mouse	O
and	O
keyboard	O
(	O
this	O
is	O
called	O
interacts	O
in	O
the	O
OFX	O
specification	O
)	O
.	O
</s>
<s>
An	O
OpenFX	B-Application
host	O
is	O
an	O
application	O
capable	O
of	O
loading	O
and	O
executing	O
OpenFX	B-Application
plugins	B-Application
.	O
</s>
<s>
OpenFX	B-Application
was	O
first	O
announced	O
on	O
Feb	O
10	O
,	O
2004	O
The	O
Foundry	O
Visionmongers	O
.	O
</s>
<s>
The	O
OpenFX	B-Application
specification	O
was	O
written	O
so	O
that	O
a	O
plugin	B-Application
supporting	O
the	O
latest	O
version	O
of	O
the	O
API	O
may	O
be	O
implemented	O
to	O
be	O
compatible	O
with	O
a	O
host	O
implementing	O
an	O
earlier	O
version	O
.	O
</s>
<s>
OpenFX	B-Application
1.0	O
was	O
released	O
in	O
2006	O
.	O
</s>
<s>
OpenFX	B-Application
1.1	O
was	O
released	O
in	O
2007	O
.	O
</s>
<s>
OpenFX	B-Application
1.2	O
was	O
released	O
in	O
2010	O
.	O
</s>
<s>
OpenFX	B-Application
1.3	O
was	O
released	O
in	O
2012	O
.	O
</s>
<s>
OpenFX	B-Application
1.4	O
was	O
released	O
in	O
2015	O
.	O
</s>
<s>
The	O
official	O
(	O
BSD	O
license	O
)	O
contain	O
sample	O
plugins	B-Application
,	O
programmed	O
using	O
the	O
standard	O
C	O
API	O
,	O
or	O
a	O
C++	O
wrapper	O
.	O
</s>
<s>
is	O
a	O
set	O
of	O
visual	O
effects	O
plugins	B-Application
,	O
mainly	O
based	O
on	O
ImageMagick	B-Language
.	O
</s>
<s>
is	O
a	O
set	O
of	O
plugins	B-Application
for	O
reading	O
or	O
writing	O
image	O
and	O
video	O
files	O
(	O
using	O
OpenImageIO	B-Language
and	O
FFmpeg	B-Library
)	O
,	O
and	O
for	O
color	O
management	O
(	O
using	O
OpenColorIO	O
)	O
.	O
</s>
<s>
is	O
a	O
collection	O
of	O
essential	O
plugins	B-Application
,	O
which	O
provide	O
many	O
basic	O
compositing	O
tools	O
,	O
such	O
as	O
filters	O
,	O
geometric	O
transforms	O
,	O
and	O
color	O
transforms	O
.	O
</s>
<s>
Commercial	O
OpenFX	B-Application
hosts	O
usually	O
provide	O
their	O
own	O
versions	O
of	O
these	O
plugins	B-Application
.	O
</s>
<s>
provides	O
many	O
plug-ins	B-Application
,	O
especially	O
for	O
color	O
grading	O
,	O
usable	O
in	O
most	O
OpenFX	B-Application
hosts	O
.	O
</s>
<s>
OpenFX	B-Application
 '	O
suite-based	O
design	O
enables	O
one	O
to	O
easily	O
introduce	O
new	O
sets	O
of	O
entry	B-Language
points	I-Language
,	O
in	O
order	O
to	O
cover	O
other	O
applications	O
while	O
still	O
relying	O
on	O
the	O
same	O
core	O
dynamic	O
plug-in	B-Application
mechanism	O
.	O
</s>
<s>
A	O
notable	O
example	O
is	O
OpenMfx	O
,	O
an	O
API	O
based	O
on	O
OpenFX	B-Application
but	O
meant	O
to	O
define	O
procedural	O
effects	O
on	O
3D	B-Algorithm
meshes	I-Algorithm
rather	O
than	O
2D	O
images	O
.	O
</s>
<s>
An	O
host	O
that	O
supports	O
the	O
Image	O
Effects	O
API	O
does	O
not	O
necessarily	O
support	O
the	O
Mesh	B-Algorithm
Effect	O
API	O
,	O
and	O
vice	O
versa	O
,	O
but	O
both	O
support	O
the	O
same	O
core	O
plug-in	B-Application
mechanism	O
and	O
basic	O
suites	O
like	O
the	O
Property	O
Suite	O
or	O
the	O
Parameter	O
Suite	O
.	O
</s>
<s>
,	O
an	O
OFX	O
Mesh	B-Algorithm
Effects	O
API	O
,	O
including	O
the	O
API	O
reference	O
as	O
well	O
as	O
a	O
C++	O
Support	O
library	O
and	O
some	O
tutorials	O
.	O
</s>
