<s>
The	O
Generic	O
Graphics	O
Library	B-Library
(	O
GEGL	B-Language
)	O
is	O
a	O
programming	B-Library
library	I-Library
under	O
development	O
for	O
image	B-Algorithm
processing	I-Algorithm
applications	O
.	O
</s>
<s>
It	O
is	O
mainly	O
developed	O
for	O
GIMP	B-Application
in	O
order	O
to	O
add	O
support	O
for	O
higher	O
bit	O
depth	O
images	O
,	O
and	O
non-destructive	O
editing	O
.	O
</s>
<s>
It	O
was	O
partially	O
implemented	O
in	O
GIMP	B-Application
2.6	O
,	O
with	O
more	O
added	O
in	O
2.8	O
,	O
and	O
is	O
now	O
a	O
central	O
part	O
in	O
2.10	O
.	O
</s>
<s>
It	O
is	O
also	O
used	O
by	O
GNOME	B-Application
's	O
and	O
.	O
</s>
<s>
GEGL	B-Language
is	O
modelled	O
after	O
a	O
directed	O
acyclic	O
graph	O
,	O
where	O
each	O
node	O
represents	O
an	O
image	O
operation	O
(	O
called	O
"	O
operators	O
"	O
or	O
"	O
ops	O
"	O
)	O
,	O
and	O
each	O
edge	O
represents	O
an	O
image	O
.	O
</s>
<s>
This	O
allows	O
features	O
such	O
as	O
having	O
very	O
quick	O
previews	O
while	O
editing	O
,	O
and	O
once	O
the	O
user	O
has	O
finished	O
making	O
changes	O
,	O
GEGL	B-Language
will	O
repeat	O
the	O
same	O
operations	O
in	O
full	O
resolution	O
for	O
the	O
final	O
image	O
in	O
the	O
background	O
.	O
</s>
<s>
An	O
operation	O
(	O
op	O
)	O
is	O
a	O
node	O
within	O
a	O
GEGL	B-Language
graph	O
responsible	O
for	O
one	O
action	O
;	O
ops	O
can	O
be	O
:	O
</s>
<s>
GEGL	B-Language
also	O
has	O
a	O
notion	O
of	O
meta	O
operations	O
,	O
where	O
one	O
operation	O
can	O
be	O
constructed	O
from	O
other	O
operations	O
(	O
e.g.	O
</s>
<s>
babl	O
,	O
a	O
support	O
library	B-Library
for	O
GEGL	B-Language
,	O
provides	O
a	O
generic	O
way	O
to	O
deal	O
with	O
color-space	B-Algorithm
conversions	O
;	O
</s>
<s>
babl	O
operates	O
abstracting	O
the	O
fundamental	O
color	O
operations	O
so	O
that	O
GEGL	B-Language
need	O
not	O
be	O
aware	O
of	O
them	O
.	O
</s>
<s>
Through	O
babl	O
,	O
GEGL	B-Language
provides	O
an	O
optimized	O
and	O
powerful	O
(	O
optionally	O
with	O
SIMD	B-Device
support	O
)	O
treatment	O
of	O
arbitrary	O
color	O
data	O
;	O
this	O
enables	O
dependent	O
applications	O
to	O
efficiently	O
support	O
a	O
wide	O
range	O
of	O
color	B-Algorithm
spaces	I-Algorithm
(	O
from	O
8-bit	O
RGB	O
to	O
full	O
floating	B-Algorithm
point	I-Algorithm
CMYK	O
)	O
with	O
minimal	O
extra	O
application	O
code	O
.	O
</s>
<s>
OpenRaster	O
is	O
an	O
XML	B-Protocol
file	O
format	O
used	O
for	O
saving	O
raster	B-Algorithm
graphics	I-Algorithm
.	O
</s>
<s>
GEGL	B-Language
's	O
lead	O
developer	O
Øyvind	O
Kolås	O
has	O
helped	O
specifying	O
OpenRaster	O
so	O
that	O
it	O
is	O
capable	O
of	O
saving	O
a	O
GEGL	B-Language
graph	O
.	O
</s>
<s>
GEGL	B-Language
was	O
originally	O
conceived	O
as	O
a	O
GIMP	B-Application
core	O
replacement	O
in	O
2000	O
by	O
Rhythm	O
&	O
Hues	O
software	O
engineers	O
,	O
finally	O
in	O
2006	O
the	O
external	O
API	B-Application
was	O
deemed	O
stable	O
enough	O
and	O
capable	O
of	O
replacing	O
the	B-Application
GIMP	I-Application
core	O
.	O
</s>
<s>
On	O
20	O
December	O
2007	O
,	O
it	O
was	O
added	O
to	O
the	O
development	O
version	O
of	O
GIMP	B-Application
.	O
</s>
<s>
Some	O
of	O
GIMP	B-Application
's	O
tools	O
have	O
already	O
been	O
converted	O
to	O
GEGL	B-Language
operations	O
;	O
mostly	O
tools	O
which	O
modify	O
colors	O
,	O
brightness	O
or	O
contrast	O
have	O
been	O
converted	O
.	O
</s>
<s>
Version	O
0.2.0	O
is	O
Part	O
of	O
Gimp	B-Application
2.8.xy	O
and	O
Series	O
0.3.xy	O
is	O
Part	O
of	O
2.9.x	O
and	O
in	O
2.10.0	O
Release	O
Candidates	O
.	O
</s>
<s>
0.4.0	O
is	O
first	O
Version	O
for	O
Version	O
2.10.0	O
of	O
Gimp	B-Application
.	O
</s>
<s>
Actual	O
Version	O
0.4.xy	O
is	O
also	O
base	O
of	O
development	O
Version	O
2.99.x	O
for	O
stable	O
3.0	O
series	O
of	O
Gimp	B-Application
.	O
</s>
<s>
As	O
of	O
unstable	O
2.9.x	O
series	O
,	O
all	O
of	O
GIMP	B-Application
's	O
core	O
relies	O
on	O
GEGL	B-Language
,	O
and	O
almost	O
half	O
of	O
filters	O
have	O
been	O
replaced	O
with	O
GEGL	B-Language
operations	O
.	O
</s>
<s>
Target	O
is	O
100%	O
of	O
canvas	O
filters	O
in	O
GEGL	B-Language
in	O
2.10	O
and	O
later	O
.	O
</s>
<s>
Historically	O
,	O
the	O
GEGL	B-Language
mascot	O
,	O
a	O
five-legged	O
goat	O
created	O
by	O
,	O
</s>
<s>
found	O
life	O
as	O
an	O
easter	O
egg	O
in	O
GNOME	B-Application
desktops	I-Application
.	O
</s>
<s>
Some	O
of	O
GEGL	B-Language
's	O
operations	O
are	O
available	O
in	O
OpenCL-based	O
hardware-accelerated	O
version	O
.	O
</s>
<s>
A	O
3rd	O
party	O
effort	O
,	O
called	O
GEGL-OpenCL	O
,	O
of	O
converting	O
more	O
operations	O
to	O
OpenCL	O
was	O
started	O
by	O
Stream	O
HPC	O
in	O
2016	O
.	O
</s>
