<s>
Quartz	B-Operating_System
Composer	I-Operating_System
is	O
a	O
node-based	O
visual	B-Language
programming	I-Language
language	I-Language
provided	O
as	O
part	O
of	O
the	O
Xcode	B-Operating_System
development	O
environment	O
in	O
macOS	B-Application
for	O
processing	O
and	O
rendering	O
graphical	O
data	O
.	O
</s>
<s>
Quartz	B-Operating_System
Composer	I-Operating_System
uses	O
OpenGL	B-Application
(	O
including	O
GLSL	B-Language
)	O
,	O
OpenCL	B-Application
(	O
only	O
in	O
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
and	O
later	O
)	O
,	O
Core	B-Operating_System
Image	I-Operating_System
,	O
Core	B-Operating_System
Video	I-Operating_System
,	O
JavaScript	B-Language
,	O
and	O
other	O
technologies	O
to	O
create	O
an	O
API	B-General_Concept
and	O
a	O
developer	O
tool	O
around	O
a	O
simple	O
visual	B-Language
programming	I-Language
paradigm	O
.	O
</s>
<s>
Apple	O
has	O
embedded	O
Quartz	O
technologies	O
deeply	O
into	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Compositions	O
created	O
in	O
Quartz	B-Operating_System
Composer	I-Operating_System
can	O
be	O
played	O
standalone	O
in	O
any	O
QuickTime-aware	O
application	O
(	O
although	O
only	O
on	O
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
and	O
later	O
)	O
,	O
as	O
a	O
system	O
Screen	B-General_Concept
Saver	I-General_Concept
,	O
as	O
an	O
iTunes	B-Operating_System
Visualizer	O
,	O
from	O
inside	O
the	O
Quartz	B-Operating_System
Composer	I-Operating_System
application	O
,	O
or	O
can	O
be	O
embedded	O
into	O
a	O
Cocoa	B-Operating_System
or	O
Carbon	B-Operating_System
application	O
via	O
supplied	O
user	B-Application
interface	I-Application
widgets	O
.	O
</s>
<s>
While	O
Quartz	B-Operating_System
Composer	I-Operating_System
is	O
included	O
with	O
the	O
iPhone	B-Operating_System
SDK	I-Operating_System
,	O
there	O
is	O
no	O
way	O
of	O
running	O
Quartz	O
Compositions	O
on	O
iOS	B-Operating_System
devices	O
.	O
</s>
<s>
Starting	O
in	O
macOS	B-Application
Catalina	O
,	O
the	O
Quartz	B-Operating_System
Composer	I-Operating_System
framework	O
has	O
been	O
deprecated	O
,	O
although	O
it	O
is	O
still	O
present	O
for	O
compatibility	O
.	O
</s>
<s>
Quartz	O
programming	O
through	O
Quartz	B-Operating_System
Composer	I-Operating_System
works	O
by	O
implementing	O
and	O
connecting	O
patches	O
.	O
</s>
<s>
This	O
is	O
useful	O
for	O
lighting	O
,	O
3D	O
transformation	O
,	O
and	O
GLSL	B-Language
shaders	O
,	O
among	O
other	O
things	O
.	O
</s>
<s>
The	O
Quartz	B-Operating_System
Composer	I-Operating_System
Editor	O
allows	O
the	O
user	O
to	O
save	O
a	O
"	O
flattened	O
"	O
copy	O
(	O
with	O
the	O
virtual	O
patches	O
fully	O
expanded	O
inside	O
)	O
,	O
for	O
easy	O
distribution	O
.	O
</s>
<s>
Network	O
functionality	O
was	O
greatly	O
improved	O
with	O
the	O
release	O
of	O
Leopard	B-Application
.	O
</s>
<s>
Also	O
new	O
in	O
Version	O
3.0	O
was	O
the	O
possibility	O
to	O
write	O
custom	O
patch	O
plugins	O
,	O
using	O
an	O
Xcode	B-Operating_System
template	O
,	O
and	O
the	O
notion	O
of	O
a	O
"	O
safe	O
mode	O
"	O
,	O
where	O
plugins	O
and	O
other	O
unsafe	O
patches	O
fail	O
to	O
load	O
.	O
</s>
<s>
Custom	O
patches	O
using	O
Apple	O
's	O
Xcode	B-Operating_System
template	O
are	O
always	O
considered	O
unsafe	O
.	O
</s>
<s>
It	O
was	O
possible	O
to	O
develop	O
custom	O
patch	O
plugins	O
for	O
Version	O
2.0	O
,	O
but	O
the	O
API	B-General_Concept
was	O
undocumented	O
and	O
private	O
,	O
and	O
was	O
never	O
supported	O
by	O
Apple	O
.	O
</s>
<s>
In	O
the	O
Quartz	B-Operating_System
Composer	I-Operating_System
editor	O
,	O
holding	O
the	O
option	B-Device
key	I-Device
while	O
selecting	O
"	O
Preferences	O
...	O
"	O
from	O
the	O
menu	O
adds	O
3	O
additional	O
tabs	O
of	O
options	O
for	O
the	O
user	O
to	O
configure	O
.	O
</s>
<s>
These	O
options	O
include	O
System	O
settings	O
,	O
Editor	O
settings	O
,	O
and	O
QuickTime	B-Application
integration	O
settings	O
.	O
</s>
<s>
In	O
Quartz	B-Operating_System
Composer	I-Operating_System
3.0	O
,	O
the	O
connections	O
between	O
patches	O
change	O
color	O
to	O
indicate	O
conversions	O
that	O
are	O
taking	O
place	O
.	O
</s>
<s>
Quartz	B-Operating_System
Composer	I-Operating_System
documents	O
are	O
called	O
Compositions	O
.	O
</s>
<s>
Compositions	O
are	O
Binary	O
Property	B-Application
Lists	I-Application
(	O
though	O
XML	B-Protocol
versions	O
are	O
also	O
supported	O
)	O
with	O
a	O
filename	O
extension	O
.qtz	O
,	O
and	O
a	O
com.apple.quartz-composer-composition	O
UTI	B-Operating_System
.	O
</s>
<s>
By	O
dragging	O
a	O
movie	O
file	O
into	O
the	O
Quartz	B-Operating_System
Composer	I-Operating_System
editor	O
,	O
a	O
reference	O
to	O
the	O
movie	O
file	O
is	O
created	O
,	O
providing	O
a	O
changing	O
image	O
that	O
can	O
be	O
connected	O
to	O
a	O
renderer	O
.	O
</s>
<s>
Many	O
image	O
formats	O
are	O
supported	O
,	O
including	O
JPEG	O
,	O
JPEG2000	O
,	O
GIF	O
,	O
PNG	O
,	O
TIFF	O
,	O
TGA	O
,	O
OpenEXR	B-Application
,	O
BMP	B-Device
,	O
ICO	O
,	O
PDF	B-Application
,	O
PICT	B-Language
,	O
ICNS	O
,	O
and	O
some	O
raw	O
digital	O
camera	O
types	O
.	O
</s>
<s>
This	O
means	O
that	O
Quartz	B-Operating_System
Composer	I-Operating_System
will	O
keep	O
vector	O
images	O
as	O
vectors	O
when	O
cropping	O
,	O
scaling	O
,	O
rotating	O
,	O
or	O
translating	O
which	O
allows	O
it	O
to	O
work	O
with	O
very	O
large	O
logical	O
image	O
dimensions	O
without	O
consuming	O
large	O
amounts	O
of	O
memory	O
or	O
processing	O
time	O
.	O
</s>
<s>
Such	O
functionality	O
is	O
most	O
apparent	O
when	O
working	O
with	O
text-based	O
images	O
,	O
or	O
PDFs	B-Application
.	O
</s>
<s>
Graphic	O
Animations	O
are	O
useful	O
for	O
animated	O
backgrounds	O
in	O
applications	O
such	O
as	O
Keynote	B-Protocol
.	O
</s>
<s>
Screen	B-General_Concept
Saver	I-General_Concept
-	O
Integrates	O
with	O
Finder	B-Application
for	O
animated	O
screen	B-General_Concept
savers	I-General_Concept
.	O
</s>
<s>
Music	O
Visualizer	O
-	O
Integrates	O
with	O
iTunes	B-Operating_System
for	O
audio	O
visualization	O
.	O
</s>
<s>
There	O
is	O
an	O
additional	O
protocol	O
that	O
Apple	O
uses	O
in	O
their	O
private	O
API	B-General_Concept
:	O
</s>
<s>
There	O
is	O
no	O
officially	O
supported	O
way	O
to	O
add	O
additional	O
protocols	O
to	O
Quartz	B-Operating_System
Composer	I-Operating_System
.	O
</s>
<s>
In	O
addition	O
to	O
protocols	O
,	O
compositions	O
can	O
also	O
conform	O
to	O
different	O
runtimes	O
where	O
Quartz	B-Operating_System
Composer	I-Operating_System
is	O
available	O
.	O
</s>
<s>
In	O
Leopard	B-Application
,	O
there	O
are	O
runtimes	O
for	O
Tiger	O
(	O
32-bit	O
)	O
,	O
as	O
well	O
as	O
32-bit	O
and	O
64-bit	O
versions	O
of	O
the	O
Leopard	B-Application
Quartz	B-Operating_System
Composer	I-Operating_System
runtime	O
.	O
</s>
<s>
The	O
Repository	O
is	O
spread	O
across	O
3	O
file	B-Application
system	I-Application
locations	O
:	O
</s>
<s>
It	O
became	O
possible	O
to	O
compare	O
compositions	O
in	O
Quartz	B-Operating_System
Composer	I-Operating_System
3.0	O
.	O
</s>
<s>
A	O
developer	O
tool	O
called	O
Quartz	B-Operating_System
Composer	I-Operating_System
Visualizer	O
was	O
released	O
with	O
Quartz	B-Operating_System
Composer	I-Operating_System
3.0	O
that	O
allows	O
compositions	O
to	O
be	O
rendered	O
across	O
multiple	O
screens	O
on	O
a	O
single	O
machine	O
,	O
or	O
even	O
spanned	O
across	O
several	O
machines	O
and	O
displays	O
.	O
</s>
<s>
Support	O
for	O
some	O
Automator	O
actions	O
was	O
added	O
with	O
the	O
release	O
of	O
Leopard	B-Application
.	O
</s>
<s>
Pierre-Olivier	O
Latour	O
originally	O
developed	O
the	O
predecessor	O
to	O
Quartz	B-Operating_System
Composer	I-Operating_System
under	O
the	O
name	O
PixelShox	O
Studio	O
.	O
</s>
