<s>
QuickDraw	B-Operating_System
is	O
the	O
2D	O
graphics	O
library	O
and	O
associated	O
Application	B-Application
Programming	I-Application
Interface	I-Application
(	O
API	B-Application
)	O
which	O
is	O
a	O
core	O
part	O
of	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
QuickDraw	B-Operating_System
still	O
existed	O
as	O
part	O
of	O
the	O
libraries	O
of	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
but	O
had	O
been	O
largely	O
superseded	O
by	O
the	O
more	O
modern	O
Quartz	B-Operating_System
graphics	O
system	O
.	O
</s>
<s>
In	O
Mac	B-Application
OS	I-Application
X	I-Application
v10.4	I-Application
,	O
QuickDraw	B-Operating_System
has	O
been	O
officially	O
deprecated	B-General_Concept
.	O
</s>
<s>
In	O
Mac	B-Application
OS	I-Application
X	I-Application
v10.5	I-Application
applications	O
using	O
QuickDraw	B-Operating_System
cannot	O
make	O
use	O
of	O
the	O
added	O
64-bit	O
support	O
.	O
</s>
<s>
In	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
v10.8	I-Operating_System
,	O
QuickDraw	B-Operating_System
header	O
support	O
was	O
removed	O
from	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Applications	O
using	O
QuickDraw	B-Operating_System
will	O
still	O
run	O
under	O
OS	B-Operating_System
X	I-Operating_System
10.8	I-Operating_System
through	O
macOS	B-Operating_System
10.13	O
;	O
however	O
,	O
the	O
current	O
versions	O
of	O
Xcode	O
and	O
the	O
macOS	B-Operating_System
SDK	O
do	O
not	O
contain	O
the	O
header	O
files	O
to	O
compile	O
such	O
programs	O
.	O
</s>
<s>
QuickDraw	B-Operating_System
was	O
grounded	O
in	O
the	O
Apple	B-Device
Lisa	I-Device
's	O
LisaGraf	O
of	O
the	O
early	O
1980s	O
and	O
was	O
designed	O
to	O
fit	O
well	O
with	O
the	O
Pascal-based	O
interfaces	O
and	O
development	O
environments	O
of	O
the	O
early	O
Apple	O
systems	O
.	O
</s>
<s>
In	O
addition	O
,	O
QuickDraw	B-Operating_System
was	O
a	O
raster	B-Algorithm
graphics	I-Algorithm
system	O
,	O
which	O
defines	O
the	O
pixel	B-Algorithm
as	O
its	O
basic	O
unit	O
of	O
graphical	O
information	O
.	O
</s>
<s>
A	O
raster	O
system	O
requires	O
much	O
less	O
processing	O
power	O
however	O
,	O
and	O
was	O
the	O
prevailing	O
paradigm	O
at	O
the	O
time	O
that	O
QuickDraw	B-Operating_System
was	O
developed	O
.	O
</s>
<s>
QuickDraw	B-Operating_System
defined	O
a	O
key	O
data	O
structure	O
,	O
the	O
graphics	O
port	O
,	O
or	O
GrafPort	B-Operating_System
.	O
</s>
<s>
The	O
most	O
obvious	O
on-screen	O
"	O
object	O
"	O
corresponding	O
to	O
a	O
GrafPort	B-Operating_System
was	O
a	O
window	O
,	O
but	O
the	O
entire	O
desktop	O
view	O
could	O
be	O
a	O
GrafPort	B-Operating_System
,	O
and	O
off-screen	O
ports	O
could	O
also	O
exist	O
.	O
</s>
<s>
The	O
GrafPort	B-Operating_System
defined	O
a	O
coordinate	O
system	O
.	O
</s>
<s>
In	O
QuickDraw	B-Operating_System
,	O
this	O
had	O
a	O
resolution	O
of	O
16	O
bits	O
,	O
giving	O
65,536	O
unique	O
vertical	O
and	O
horizontal	O
locations	O
.	O
</s>
<s>
A	O
window	O
was	O
usually	O
set	O
up	O
so	O
that	O
the	O
top	O
,	O
left	O
corner	O
of	O
its	O
content	O
area	O
was	O
located	O
at	O
0	O
,	O
0	O
in	O
the	O
associated	O
GrafPort	B-Operating_System
.	O
</s>
<s>
QuickDraw	B-Operating_System
coordinates	O
referred	O
to	O
the	O
infinitely	O
thin	O
lines	O
between	O
pixel	B-Algorithm
locations	O
.	O
</s>
<s>
An	O
actual	O
pixel	B-Algorithm
was	O
drawn	O
in	O
the	O
space	O
to	O
the	O
immediate	O
right	O
and	O
below	O
the	O
coordinate	O
.	O
</s>
<s>
This	O
made	O
it	O
easier	O
for	O
programmers	O
to	O
avoid	O
graphical	O
glitches	O
caused	O
by	O
off-by-one	B-Error_Name
errors	I-Error_Name
.	O
</s>
<s>
On	O
the	O
Macintosh	O
,	O
pixels	B-Algorithm
were	O
square	O
,	O
and	O
a	O
GrafPort	B-Operating_System
had	O
a	O
default	O
resolution	O
of	O
72	O
pixels	B-Algorithm
per	O
inch	O
,	O
chosen	O
to	O
match	O
conventions	O
established	O
by	O
the	O
printing	O
industry	O
of	O
having	O
72	O
points	O
per	O
inch	O
.	O
</s>
<s>
QuickDraw	B-Operating_System
also	O
contained	O
a	O
number	O
of	O
scaling	O
and	O
mapping	O
functions	O
.	O
</s>
<s>
QuickDraw	B-Operating_System
maintained	O
a	O
number	O
of	O
global	O
variables	O
per	O
process	O
,	O
chief	O
among	O
these	O
being	O
the	O
current	O
port	O
.	O
</s>
<s>
This	O
originally	O
simplified	O
the	O
API	B-Application
,	O
since	O
all	O
operations	O
pertained	O
to	O
"	O
the	O
current	O
port	O
,	O
"	O
but	O
as	O
the	O
OS	O
developed	O
,	O
this	O
use	O
of	O
global	O
state	O
has	O
also	O
made	O
QuickDraw	B-Operating_System
much	O
harder	O
to	O
integrate	O
with	O
modern	O
design	O
approaches	O
such	O
as	O
multi-threading	B-Operating_System
and	O
pre-emptive	O
multitasking	O
.	O
</s>
<s>
To	O
address	O
these	O
problems	O
,	O
the	O
Carbon	B-Operating_System
API	I-Operating_System
(	O
a	O
bridge	O
between	O
Mac	B-Application
OS	I-Application
9	O
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
)	O
added	O
additional	O
parameters	O
to	O
some	O
of	O
the	O
routines	O
,	O
allowing	O
for	O
the	O
(	O
opaque	O
)	O
storage	O
of	O
thread	B-Operating_System
information	O
and	O
a	O
new	O
(	O
non-polled	O
)	O
event	O
structure	O
.	O
</s>
<s>
Everything	O
seen	O
on	O
a	O
classic	B-Application
Mac	I-Application
OS	I-Application
screen	O
is	O
drawn	O
by	O
QuickDraw	B-Operating_System
,	O
but	O
the	O
library	O
itself	O
is	O
quite	O
low	O
level	O
.	O
</s>
<s>
An	O
important	O
feature	O
of	O
QuickDraw	B-Operating_System
was	O
support	O
for	O
transfer	O
modes	O
,	O
which	O
governed	O
how	O
a	O
destination	O
pixel	B-Algorithm
value	O
was	O
related	O
to	O
its	O
previous	O
value	O
and	O
the	O
color	O
of	O
the	O
object	O
being	O
drawn	O
.	O
</s>
<s>
The	O
set	O
of	O
attributes	O
of	O
the	O
pen	O
and	O
text	O
drawing	O
are	O
associated	O
with	O
the	O
GrafPort	B-Operating_System
.	O
</s>
<s>
Regions	O
are	O
a	O
key	O
data	O
structure	O
in	O
QuickDraw	B-Operating_System
.	O
</s>
<s>
They	O
define	O
an	O
arbitrary	O
set	O
of	O
pixels	B-Algorithm
,	O
rather	O
like	O
a	O
bitmap	O
,	O
but	O
in	O
a	O
compressed	O
form	O
which	O
can	O
be	O
very	O
rapidly	O
manipulated	O
in	O
complex	O
ways	O
.	O
</s>
<s>
They	O
can	O
be	O
used	O
within	O
a	O
GrafPort	B-Operating_System
for	O
clipping	B-Algorithm
,	O
or	O
drawn	O
filled	O
or	O
framed	O
like	O
any	O
other	O
shape	O
.	O
</s>
<s>
A	O
Region	O
need	O
not	O
consist	O
of	O
a	O
contiguous	O
set	O
of	O
pixels	B-Algorithm
-	O
disconnected	O
regions	O
are	O
possible	O
and	O
common	O
.	O
</s>
<s>
Regions	O
underpin	O
the	O
rest	O
of	O
QuickDraw	B-Operating_System
,	O
permitting	O
clipping	B-Algorithm
to	O
arbitrary	O
shapes	O
,	O
essential	O
for	O
the	O
implementation	O
of	O
multiple	O
overlapping	O
windows	O
.	O
</s>
<s>
A	O
region	O
is	O
specified	O
(	O
after	O
initial	O
creation	O
)	O
by	O
an	O
opening	O
of	O
the	O
region	O
,	O
drawing	O
various	O
QuickDraw	B-Operating_System
shapes	O
,	O
and	O
closing	O
the	O
region	O
.	O
</s>
<s>
Hidden	O
routines	O
construct	O
the	O
region	O
as	O
the	O
QuickDraw	B-Operating_System
commands	O
are	O
executed	O
.	O
</s>
<s>
Regions	O
are	O
implemented	O
using	O
both	O
vertical	O
and	O
horizontal	O
compression	B-General_Concept
.	O
</s>
<s>
A	O
region	O
is	O
stored	O
as	O
a	O
series	O
of	O
horizontal	O
scan	O
lines	O
(	O
"	O
rasters	B-Algorithm
"	O
)	O
,	O
each	O
of	O
which	O
contains	O
a	O
vertical	O
coordinate	O
followed	O
by	O
a	O
list	O
of	O
horizontal	O
inversion	O
coordinates	O
.	O
</s>
<s>
Further	O
compression	B-General_Concept
is	O
achieved	O
by	O
storing	O
each	O
line	O
differentially	O
:	O
each	O
line	O
contains	O
only	O
the	O
differences	O
from	O
the	O
previous	O
line	O
rather	O
than	O
a	O
full	O
set	O
of	O
inversion	O
points	O
.	O
</s>
<s>
In	O
this	O
way	O
,	O
a	O
commonly	O
used	O
region	O
,	O
the	O
rounded	O
corner	O
rectangle	O
,	O
is	O
efficiently	O
encoded	O
,	O
and	O
complex	O
operations	O
such	O
as	O
region	O
composition	O
and	O
image	O
clipping	B-Algorithm
may	O
be	O
done	O
without	O
requiring	O
either	O
extensive	O
processor	O
cycles	O
or	O
large	O
amounts	O
of	O
memory	O
.	O
</s>
<s>
(	O
The	O
original	O
systems	O
executing	O
QuickDraw	B-Operating_System
code	O
used	O
processors	O
operating	O
at	O
8	O
megahertz	O
clock	O
rates	O
and	O
systems	O
had	O
but	O
128	O
kilobytes	O
of	O
writable	O
memory	O
.	O
)	O
</s>
<s>
However	O
,	O
the	O
API	B-Application
includes	O
conversion	O
routines	O
to	O
and	O
from	O
BitMaps	O
.	O
</s>
<s>
Apple	O
has	O
recently	O
(	O
in	O
the	O
Carbon	B-Operating_System
API	I-Operating_System
)	O
defined	O
regions	O
as	O
an	O
opaque	O
structure	O
under	O
some	O
program	O
compilation	O
options	O
.	O
</s>
<s>
Any	O
series	O
of	O
graphics	O
calls	O
to	O
QuickDraw	B-Operating_System
can	O
be	O
recorded	O
in	O
a	O
structure	O
called	O
a	O
Picture	O
.	O
</s>
<s>
A	O
picture	O
can	O
be	O
saved	O
to	O
disk	O
in	O
which	O
form	O
it	O
defines	O
the	O
Apple	O
PICT	B-Language
format	O
.	O
</s>
<s>
An	O
entire	O
BitMap	O
(	O
or	O
PixMap	O
,	O
when	O
referring	O
to	O
color	O
images	O
)	O
may	O
be	O
copied	O
from	O
one	O
GrafPort	B-Operating_System
to	O
another	O
,	O
with	O
scaling	O
and	O
clipping	B-Algorithm
.	O
</s>
<s>
Known	O
as	O
blitting	B-Algorithm
,	O
or	O
CopyBits	O
,	O
after	O
the	O
name	O
of	O
the	O
function	O
,	O
this	O
operation	O
is	O
the	O
basis	O
for	O
most	O
animation	O
and	O
sprite-like	O
effects	O
on	O
the	O
Mac	O
.	O
</s>
<s>
QuickDraw	B-Operating_System
provides	O
a	O
similar	O
blitting	B-Algorithm
function	O
which	O
is	O
designed	O
to	O
implement	O
scrolling	O
within	O
a	O
GrafPort	B-Operating_System
-	O
the	O
image	O
in	O
the	O
port	O
can	O
be	O
shifted	O
to	O
a	O
new	O
location	O
without	O
scaling	O
(	O
but	O
with	O
clipping	B-Algorithm
if	O
desired	O
)	O
.	O
</s>
<s>
Each	O
graphics	O
primitive	O
operation	O
is	O
vectored	O
through	O
the	O
StdProcs	O
,	O
a	O
series	O
of	O
function	B-Language
pointers	I-Language
stored	O
in	O
the	O
GrafPort	B-Operating_System
.	O
</s>
<s>
This	O
limited	O
polymorphism	B-Application
permits	O
individual	O
operations	O
to	O
be	O
overridden	O
or	O
replaced	O
by	O
custom	O
functions	O
,	O
allowing	O
printer	O
drivers	O
to	O
intercept	O
graphics	O
commands	O
and	O
translate	O
them	O
to	O
suitable	O
printer	O
operations	O
.	O
</s>
<s>
In	O
this	O
way	O
,	O
QuickDraw	B-Operating_System
can	O
be	O
rendered	O
using	O
PostScript	B-Language
,	O
a	O
fact	O
that	O
enabled	O
the	O
Macintosh	O
to	O
practically	O
invent	O
desktop	O
publishing	O
.	O
</s>
<s>
Similar	O
to	O
a	O
subclass	B-Language
,	O
the	O
Window	O
data	O
structure	O
began	O
with	O
the	O
associated	O
GrafPort	B-Operating_System
,	O
thus	O
basically	O
making	O
windows	O
exchangeable	O
with	O
any	O
GrafPort	B-Operating_System
.	O
</s>
<s>
While	O
convenient	O
,	O
this	O
made	O
it	O
easy	O
to	O
write	O
erroneous	O
code	O
that	O
passed	O
an	O
offscreen	O
graphics	O
port	O
into	O
API	B-Application
that	O
expected	O
a	O
full-blown	O
window	O
.	O
</s>
<s>
QuickDraw	B-Operating_System
started	O
life	O
as	O
Lisa	B-Device
Graf	O
as	O
part	O
of	O
the	O
Apple	B-Device
Lisa	I-Device
development	O
.	O
</s>
<s>
Originally	O
,	O
QuickDraw	B-Operating_System
GrafPorts	B-Operating_System
only	O
supported	O
a	O
bit	O
depth	O
of	O
1	O
,	O
that	O
is	O
one	O
bit	O
per	O
pixel	B-Algorithm
,	O
or	O
black	O
and	O
white	O
.	O
</s>
<s>
This	O
suited	O
the	O
built-in	O
screen	O
of	O
the	O
early	O
Macintosh	O
,	O
with	O
its	O
fixed	O
size	O
of	O
512×342	O
pixels	B-Algorithm
.	O
</s>
<s>
Limited	O
color	O
was	O
supported	O
using	O
a	O
crude	O
planar	B-Device
model	O
,	O
allowing	O
QuickDraw	B-Operating_System
to	O
drive	O
some	O
types	O
of	O
dot-matrix	O
printer	O
that	O
used	O
multi-colored	O
ribbons	O
,	O
but	O
very	O
few	O
applications	O
supported	O
this	O
feature	O
.	O
</s>
<s>
In	O
1987	O
,	O
the	O
Macintosh	B-Device
II	I-Device
was	O
developed	O
and	O
launched	O
,	O
which	O
was	O
designed	O
as	O
a	O
more	O
conventional	O
three-box	O
design	O
-	O
Computer	B-Device
,	O
monitor	B-Device
and	O
keyboard	B-Device
all	O
separate	O
.	O
</s>
<s>
Because	O
the	O
monitor	B-Device
was	O
separate	O
,	O
and	O
larger	O
than	O
the	O
original	O
Mac	O
,	O
the	O
video	O
architecture	O
had	O
to	O
necessarily	O
change	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
Mac	B-Device
II	I-Device
took	O
the	O
Macintosh	O
from	O
black-and-white	O
to	O
full	O
color	O
.	O
</s>
<s>
Thus	O
Color	O
QuickDraw	B-Operating_System
,	O
a	O
significant	O
extension	O
of	O
the	O
original	O
QuickDraw	B-Operating_System
,	O
was	O
created	O
.	O
</s>
<s>
Color	O
QuickDraw	B-Operating_System
introduced	O
new	O
data	O
structures	O
,	O
including	O
GDevices	O
to	O
represent	O
each	O
attached	O
video	O
card/monitor	O
,	O
and	O
a	O
new	O
color	O
GrafPort	B-Operating_System
(	O
CGrafPort	O
)	O
structure	O
to	O
handle	O
color	O
,	O
as	O
well	O
as	O
PixMaps	O
instead	O
of	O
BitMaps	O
for	O
multiple	O
bits-per-pixel	O
images	O
.	O
</s>
<s>
The	O
upper	O
two	O
bits	O
of	O
the	O
rowBytes	O
field	O
were	O
pressed	O
into	O
use	O
as	O
flags	O
to	O
distinguish	O
a	O
GrafPort	B-Operating_System
from	O
a	O
CGrafPort	O
(	O
they	O
were	O
always	O
zero	O
on	O
old-style	O
GrafPorts	B-Operating_System
because	O
a	O
BitMap	O
could	O
never	O
feasibly	O
be	O
so	O
wide	O
as	O
to	O
ever	O
set	O
these	O
bits	O
)	O
.	O
</s>
<s>
The	O
use	O
of	O
these	O
two	O
high	O
bits	O
would	O
come	O
back	O
to	O
haunt	O
QuickDraw	B-Operating_System
later	O
,	O
as	O
it	O
forced	O
a	O
maximum	O
row	O
width	O
of	O
just	O
4,095	O
on	O
32-bit	O
PixMaps	O
,	O
which	O
became	O
problematic	O
for	O
high-resolution	O
graphics	O
work	O
.	O
</s>
<s>
Later	O
development	O
(	O
Carbon	B-Operating_System
)	O
eliminated	O
this	O
limitation	O
but	O
was	O
not	O
fully	O
backward	O
compatible	O
.	O
</s>
<s>
A	O
Palette	O
Manager	O
was	O
also	O
added	O
in	O
Color	O
QuickDraw	B-Operating_System
which	O
managed	O
the	O
arbitration	O
of	O
colors	O
on	O
indexed	O
video	O
devices	O
.	O
</s>
<s>
Most	O
graphics	O
primitives	O
operations	O
remained	O
either	O
unchanged	O
(	O
but	O
would	O
operate	O
in	O
color	O
)	O
,	O
or	O
else	O
new	O
color	O
versions	O
of	O
the	O
black	O
and	O
white	O
APIs	B-Application
were	O
added	O
.	O
</s>
<s>
Initially	O
,	O
Color	O
QuickDraw	B-Operating_System
was	O
only	O
capable	O
of	O
operating	O
with	O
1	O
,	O
2	O
,	O
4	O
and	O
8-bit	O
video	O
cards	O
,	O
which	O
were	O
all	O
that	O
was	O
available	O
at	O
the	O
time	O
.	O
</s>
<s>
Soon	O
after	O
however	O
,	O
24-bit	O
video	O
cards	O
appeared	O
(	O
so-called	O
true	O
color	O
)	O
,	O
and	O
QuickDraw	B-Operating_System
was	O
updated	O
again	O
to	O
support	O
up	O
to	O
32	O
bits	O
per	O
pixel	B-Algorithm
(	O
in	O
reality	O
,	O
24	O
bits	O
,	O
with	O
8	O
unused	O
)	O
of	O
color	O
data	O
(	O
"	O
32-Bit	O
QuickDraw	B-Operating_System
"	O
)	O
.	O
</s>
<s>
The	O
architecture	O
always	O
allowed	O
for	O
this	O
,	O
however	O
,	O
so	O
no	O
new	O
APIs	B-Application
were	O
necessary	O
.	O
</s>
<s>
QuickDraw	B-Operating_System
took	O
care	O
of	O
managing	O
the	O
resampling	O
of	O
colors	O
to	O
the	O
available	O
color	O
depths	O
of	O
the	O
actual	O
video	O
hardware	O
,	O
or	O
transfer	O
between	O
offscreen	O
image	O
buffers	O
,	O
including	O
optionally	O
dithering	O
images	O
down	O
to	O
a	O
lower	O
depth	O
to	O
improve	O
image	O
quality	O
.	O
</s>
<s>
The	O
architecture	O
of	O
QuickDraw	B-Operating_System
had	O
always	O
allowed	O
the	O
creation	O
of	O
GrafPorts	B-Operating_System
and	O
their	O
associated	O
BitMaps	O
or	O
PixMaps	O
"	O
offscreen	O
"	O
,	O
where	O
graphics	O
could	O
be	O
composed	O
in	O
memory	O
without	O
it	O
being	O
visible	O
immediately	O
on	O
the	O
screen	O
.	O
</s>
<s>
Pixels	B-Algorithm
could	O
be	O
transferred	O
between	O
these	O
offscreen	O
ports	O
and	O
the	O
screen	O
using	O
the	O
QuickDraw	B-Operating_System
blitting	B-Algorithm
function	O
CopyBits	O
.	O
</s>
<s>
However	O
,	O
until	O
the	O
advent	O
of	O
32-Bit	O
QuickDraw	B-Operating_System
,	O
such	O
offscreen	O
worlds	O
had	O
to	O
be	O
created	O
and	O
set	O
up	O
by	O
hand	O
by	O
programmers	O
within	O
their	O
applications	O
.	O
</s>
<s>
With	O
32-Bit	O
QuickDraw	B-Operating_System
,	O
OS	O
support	O
for	O
handling	O
this	O
was	O
added	O
,	O
with	O
the	O
"	O
Offscreen	O
Graphics	O
World	O
"	O
or	O
GWorld	O
.	O
</s>
<s>
The	O
video	O
buffer	O
(	O
PixMap	O
)	O
of	O
a	O
GWorld	O
could	O
be	O
stored	O
in	O
main	O
memory	O
,	O
or	O
when	O
available	O
in	O
unused	O
parts	O
of	O
video	O
ram	O
where	O
copying	O
to	O
the	O
screen	O
could	O
be	O
optimized	O
for	O
speed	O
by	O
avoiding	O
the	O
need	O
to	O
transfer	O
a	O
large	O
amount	O
of	O
pixel	B-Algorithm
data	O
across	O
the	O
main	O
memory	O
bus	O
.	O
</s>
<s>
With	O
the	O
advent	O
of	O
QuickTime	B-Application
,	O
QuickDraw	B-Operating_System
gained	O
the	O
ability	O
to	O
deal	O
with	O
compressed	O
raster	O
data	O
,	O
such	O
as	O
JPEG	O
.	O
</s>
<s>
The	O
QuickTime	B-Application
Image	O
Compression	B-General_Concept
Manager	O
integrated	O
closely	O
with	O
QuickDraw	B-Operating_System
:	O
in	O
particular	O
,	O
image	O
decompression	O
calls	O
were	O
full-fledged	O
QuickDraw	B-Operating_System
drawing	O
calls	O
,	O
and	O
if	O
a	O
picture	O
was	O
being	O
recorded	O
,	O
the	O
compressed	B-General_Concept
data	I-General_Concept
would	O
be	O
saved	O
as	O
part	O
of	O
the	O
picture	O
,	O
for	O
display	O
when	O
the	O
picture	O
was	O
later	O
drawn	O
.	O
</s>
<s>
The	O
Image	O
Compression	B-General_Concept
Manager	O
also	O
added	O
integration	O
with	O
ColorSync	O
color	O
matching	O
.	O
</s>
<s>
After	O
this	O
,	O
apart	O
from	O
back-end	O
changes	O
to	O
optimize	O
for	O
new	O
processor	O
architectures	O
(	O
PowerPC	B-Architecture
)	O
,	O
QuickDraw	B-Operating_System
remained	O
largely	O
unchanged	O
throughout	O
the	O
rest	O
of	O
the	O
life	O
of	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
.	O
</s>
<s>
QuickDraw	B-Operating_System
GX	I-Operating_System
and	O
QuickDraw	B-Operating_System
3D	I-Operating_System
shared	O
the	O
QuickDraw	B-Operating_System
name	O
and	O
were	O
able	O
to	O
interoperate	O
with	O
QuickDraw	B-Operating_System
PixMap	O
and	O
picture	O
data	O
structures	O
,	O
but	O
were	O
otherwise	O
completely	O
separate	O
in	O
functionality	O
.	O
</s>
<s>
With	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
QuickDraw	B-Operating_System
became	O
part	O
of	O
the	O
Carbon	B-Operating_System
API	I-Operating_System
.	O
</s>
<s>
In	O
2005	O
,	O
with	O
the	O
release	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
10.4	I-Application
,	O
QuickDraw	B-Operating_System
was	O
officially	O
deprecated	B-General_Concept
.	O
</s>
<s>
In	O
2010	O
with	O
MacPaint	B-Operating_System
1.3	O
'	O
s	O
source	O
code	O
release	O
through	O
the	O
Computer	B-Device
History	O
Museum	O
,	O
a	O
historical	O
version	O
of	O
QuickDraw	B-Operating_System
source	O
code	O
became	O
available	O
too	O
.	O
</s>
