<s>
Paint.net	B-Language
(	O
stylized	O
as	O
Paint.NET	B-Language
or	O
paint.net	B-Language
)	O
is	O
a	O
freeware	B-License
raster	B-Application
graphics	I-Application
editor	I-Application
program	O
for	O
Microsoft	B-Application
Windows	I-Application
,	O
developed	O
originally	O
on	O
.NET	B-Application
Framework	I-Application
,	O
and	O
as	O
of	O
version	O
4.3	O
.NET	B-Application
.	O
</s>
<s>
Paint.net	B-Language
was	O
originally	O
created	O
by	O
Rick	B-Language
Brewster	I-Language
as	O
a	O
Washington	O
State	O
University	O
student	O
project	O
,	O
and	O
has	O
evolved	O
from	O
a	O
simple	O
replacement	O
for	O
the	O
Microsoft	B-Application
Paint	I-Application
program	O
into	O
a	O
program	O
for	O
editing	O
mainly	O
graphics	O
,	O
with	O
support	O
for	O
plugins	B-Application
.	O
</s>
<s>
Paint.net	B-Language
originated	O
as	O
a	O
computer	B-General_Concept
science	I-General_Concept
senior	O
design	O
project	O
during	O
spring	O
2004	O
at	O
Washington	O
State	O
University	O
.	O
</s>
<s>
The	O
paint.net	B-Language
project	O
continued	O
over	O
the	O
summer	O
and	O
into	O
the	O
autumn	O
2004	O
semester	O
for	O
both	O
the	O
version	O
1.1	O
and	O
2.0	O
releases	O
.	O
</s>
<s>
Development	O
continues	O
with	O
one	O
programmer	O
who	O
worked	O
on	O
previous	O
versions	O
of	O
Paint.net	B-Language
while	O
he	O
was	O
a	O
student	O
at	O
WSU	O
.	O
</s>
<s>
Initially	O
,	O
Paint.net	B-Language
was	O
released	O
under	O
a	O
modified	O
version	O
of	O
the	B-License
MIT	I-License
License	I-License
,	O
with	O
the	O
exclusion	O
of	O
the	O
installer	O
,	O
text	O
,	O
and	O
graphics	O
.	O
</s>
<s>
In	O
November	O
2009	O
,	O
the	O
software	O
was	O
made	O
proprietary	B-Application
,	O
restricting	O
the	O
sale	O
or	O
creation	O
of	O
derivative	O
works	O
of	O
the	O
software	O
.	O
</s>
<s>
Starting	O
with	O
version	O
4.0.18	O
,	O
paint.net	B-Language
is	O
published	O
in	O
two	O
editions	O
:	O
A	O
classic	O
edition	O
remains	O
freeware	B-License
,	O
similar	O
to	O
all	O
other	O
versions	O
since	O
3.5	O
.	O
</s>
<s>
Another	O
edition	O
,	O
however	O
,	O
is	O
published	O
to	O
Microsoft	B-Application
Store	I-Application
under	O
a	O
trialware	O
license	O
and	O
is	O
available	O
to	O
purchase	O
for	O
US$7	O
.	O
</s>
<s>
Paint.net	B-Language
is	O
primarily	O
programmed	O
in	O
the	O
C#	B-Application
programming	I-Application
language	I-Application
.	O
</s>
<s>
Its	O
native	O
image	O
format	O
,	O
.PDN	O
,	O
is	O
a	O
compressed	B-General_Concept
representation	O
of	O
the	O
application	O
's	O
internal	O
object	O
format	O
,	O
which	O
preserves	O
layering	O
and	O
other	O
information	O
.	O
</s>
<s>
Paint.net	B-Language
supports	O
plugins	B-Application
,	O
which	O
add	O
image	O
adjustments	O
,	O
effects	O
,	O
and	O
support	O
for	O
additional	O
file	O
types	O
.	O
</s>
<s>
They	O
can	O
be	O
programmed	O
using	O
any	O
.NET	B-Application
Framework	I-Application
programming	O
language	O
,	O
though	O
they	O
are	O
most	O
commonly	O
written	O
in	O
C#	B-Application
.	O
</s>
<s>
These	O
are	O
created	O
by	O
volunteer	O
coders	O
on	O
the	O
program	O
's	O
discussion	O
board	O
,	O
the	O
paint.net	B-Language
Forum	O
.	O
</s>
<s>
For	O
instance	O
,	O
a	O
DirectDraw	O
Surface	O
file	O
type	O
plugin	B-Application
,	O
(	O
originally	O
by	O
Dean	O
Ashton	O
)	O
and	O
an	O
Ink	O
Sketch	O
and	O
Soften	O
Portrait	O
effect	O
(	O
originally	O
by	O
David	O
Issel	O
)	O
were	O
added	O
to	O
Paint.net	B-Language
in	O
version	O
3.10	O
.	O
</s>
<s>
Hundreds	O
of	O
plugins	B-Application
have	O
been	O
produced	O
;	O
such	O
as	O
Shape3D	O
,	O
which	O
renders	O
a	O
2D	O
drawing	O
into	O
a	O
3D	O
shape	O
.	O
</s>
<s>
Some	O
plugins	B-Application
expand	O
on	O
the	O
functionality	O
that	O
comes	O
with	O
Paint.net,	O
such	O
as	O
Curves+	O
and	O
Sharpen+	O
,	O
which	O
extend	O
the	O
included	O
tools	O
Curves	O
and	O
Sharpen	O
,	O
respectively	O
.	O
</s>
<s>
Examples	O
of	O
file	O
type	O
plugins	B-Application
include	O
an	O
Animated	O
Cursor	O
and	O
Icon	O
plugin	B-Application
and	O
an	O
Adobe	O
Photoshop	O
file	O
format	O
plugin	B-Application
.	O
</s>
<s>
Several	O
of	O
these	O
plugins	B-Application
are	O
based	O
on	O
existing	O
open	O
source	O
software	O
,	O
such	O
as	O
a	O
raw	B-Application
image	I-Application
format	I-Application
plugin	B-Application
that	O
uses	O
dcraw	B-Algorithm
and	O
a	O
PNG	O
optimization	O
plugin	B-Application
that	O
uses	O
OptiPNG	B-Application
.	O
</s>
<s>
Paint.net	B-Language
was	O
created	O
for	O
Windows	O
,	O
and	O
has	O
no	O
native	O
support	O
for	O
any	O
other	O
system	O
.	O
</s>
<s>
In	O
May	O
2007	O
,	O
Miguel	O
de	O
Icaza	O
officially	O
started	O
a	O
porting	O
project	O
called	O
paint-mono	O
.	O
</s>
<s>
This	O
project	O
had	O
partially	O
ported	O
Paint.net	B-Language
3.0	O
to	O
Mono	B-Application
,	O
an	O
open-source	O
implementation	O
of	O
the	O
Common	O
Language	O
Infrastructure	O
on	O
which	O
the	O
.NET	B-Application
Framework	I-Application
is	O
based	O
.	O
</s>
<s>
This	O
allowed	O
Paint.net	B-Language
to	O
be	O
run	O
on	O
Mono-supported	O
platforms	O
,	O
such	O
as	O
Linux	B-Application
.	O
</s>
<s>
Newer	O
Mono	B-Application
runtime	I-Application
6	O
versions	O
are	O
able	O
to	O
run	O
original	O
Paint.NET	B-Language
releases	O
up	O
to	O
3.5.11	O
almost	O
perfectly	O
.	O
</s>
<s>
In	O
2010	O
,	O
developer	O
Jonathan	O
Pobst	O
started	O
a	O
project	O
called	O
Pinta	B-Language
,	O
describing	O
it	O
as	O
a	O
clone	O
of	O
Paint.net	B-Language
for	O
Mono	B-Application
and	O
Gtk#	O
.	O
</s>
<s>
Pinta	B-Language
reused	O
the	O
adjustments	O
and	O
effects	O
code	O
from	O
Paint.net	B-Language
but	O
otherwise	O
is	O
original	O
code	O
.	O
</s>
<s>
VersionRelease	O
dateSignificant	O
changes1.0Initial	O
release.1.1Support	O
for	O
effect	O
plugins.2.0Many	O
new	O
effects	O
,	O
adjustments	O
,	O
and	O
tools.2.5Internationalization	O
support	O
;	O
update	O
manager	O
;	O
support	O
for	O
file	O
type	O
plugins.2.6Use	O
of	O
.NET	B-Application
Framework	I-Application
2.0	O
,	O
full	O
64-bit	O
support.2.72Last	O
version	O
to	O
support	O
Windows	O
2000.3.0This	O
major	O
release	O
introduces	O
a	O
new	O
multi-document	O
interface	O
(	O
MDI	O
)	O
,	O
availability	O
in	O
8	O
languages	O
,	O
a	O
highly	O
requested	O
interactive	O
gradient	O
tool	O
,	O
four	O
new	O
effects	O
,	O
a	O
user-definable	O
color	O
palette	O
,	O
lower	O
disk	O
space	O
usage	O
for	O
scratch	O
files	O
,	O
and	O
a	O
generally	O
cleaner	O
and	O
improved	O
user	O
interface3.05Added	O
a	O
new	O
effect	O
;	O
improved	O
certain	O
parts	O
of	O
the	O
user	O
interface.3.10Ink	O
Sketch	O
and	O
Soften	O
Portrait	O
effects	O
added	O
;	O
support	O
for	O
the	O
DDS	O
filetype.3.20Enhancements	O
to	O
the	O
built-in	O
effects	O
,	O
a	O
re-organized	O
Effects	O
menu	O
,	O
a	O
new	O
and	O
much	O
easier	O
system	O
for	O
effect	O
plugin	B-Application
development	O
,	O
better	O
error	O
handling	O
for	O
plugins	B-Application
,	O
and	O
the	O
ability	O
to	O
draw	O
Fixed	O
Ratio	O
and	O
Fixed	O
Size	O
selections	O
with	O
the	O
Rectangle	O
Select	O
tool	O
.	O
</s>
<s>
(	O
With	O
this	O
release	O
,	O
Paint.NET	B-Language
is	O
also	O
no	O
longer	O
open	O
source	O
;	O
and	O
even	O
the	O
sources	O
of	O
3.10	O
release	O
are	O
removed	O
from	O
the	O
servers	O
)	O
.3.22Adds	O
a	O
new	O
Reduce	O
Noise	O
effect.3.30This	O
release	O
adds	O
an	O
Italian	O
translation	O
,	O
a	O
new	O
"	O
Fragment	O
Blur	O
"	O
effect	O
,	O
and	O
the	O
ability	O
to	O
save	O
PNG	O
images	O
at	O
8	O
-	O
and	O
24-bit	O
color	O
depths	O
.	O
</s>
<s>
For	O
developers	O
,	O
the	O
IndirectUI	O
system	O
has	O
some	O
new	O
controls	O
,	O
some	O
new	O
constraint	O
rules	O
,	O
and	O
can	O
now	O
be	O
used	O
for	O
file	O
type	O
plugins.3.35A	O
new	O
Posterize	O
adjustment	O
,	O
a	O
new	O
Intersect	O
selection	O
mode	O
,	O
dramatically	O
improved	O
performance	O
for	O
selection	O
editing.3.5Improved	O
performance	O
reliability	O
,	O
reducing	O
memory	O
usage	O
,	O
upgrading	O
to	O
the	O
latest	O
.NET	B-Application
Framework	I-Application
version	O
,	O
and	O
refreshing	O
the	O
user	O
interface	O
for	O
Aero	O
and	O
glass	O
(	O
Windows	O
7	O
/	O
Vista	O
)	O
3.5.2Resolves	O
some	O
feature	O
disparities	O
in	O
the	O
Text	O
tool	O
between	O
GDI	O
(	O
Windows	O
XP	O
)	O
and	O
DirectWrite	O
(	O
Windows	O
7/Windows	O
Vista	O
)	O
.	O
</s>
<s>
It	O
also	O
improves	O
overall	O
performance	O
,	O
as	O
well	O
as	O
the	O
correctness	O
and	O
quality	O
of	O
the	O
Move	O
Selected	O
Pixels	O
tool	O
,	O
the	O
Image->Resize	O
function	O
,	O
and	O
the	O
Hue/Saturation	O
adjustment.3.5.5Fixes	O
a	O
bug	O
when	O
saving	O
8-bit	O
images	O
,	O
improves	O
layer	O
composition	O
and	O
Gaussian	O
Blur	O
performance	O
,	O
and	O
is	O
updated	O
to	O
support	O
the	O
new	O
.NET	B-Application
Framework	I-Application
4.0	O
in	O
some	O
cases	O
.	O
</s>
<s>
Dropped	O
support	O
of	O
Windows	O
XP	O
without	O
Service	O
Pack	O
3	O
,	O
additional	O
support	O
for	O
.NET	B-Application
4.0.3.5.11Fixes	O
the	O
Gaussian	O
Blur	O
effect	O
that	O
was	O
incorrectly	O
calculating	O
alpha	O
values	O
for	O
non-opaque	O
pixels	O
.	O
</s>
<s>
The	O
built-in	O
updater	O
now	O
supports	O
upgrading	O
to	O
paint.net	B-Language
4.0	I-Language
.	O
</s>
<s>
Last	O
version	O
to	O
support	O
Windows	O
XP	O
and	O
Windows	O
Vista.4.04.0	O
requires	O
Windows	O
7	O
SP1	O
or	O
newer	O
,	O
and	O
uses	O
.NET	B-Application
Framework	I-Application
4.5.1	O
(	O
it	O
can	O
be	O
installed	O
automatically	O
if	O
needed	O
)	O
Paint.NET	B-Language
-	O
Download	O
:	O
System	O
Requirements	O
This	O
complete	O
rewrite	O
contains	O
a	O
brand	O
new	O
,	O
asynchronous	O
,	O
fully	O
multithreaded	O
rendering	O
engine	O
,	O
antialiased	O
selections	O
,	O
a	O
redesigned	O
user	O
interface	O
,	O
soft	O
brushes	O
,	O
and	O
a	O
new	O
shapes	O
tool	O
.	O
</s>
<s>
Most	O
Tools	O
now	O
support	O
"	O
fine-grained	O
history	O
"	O
and	O
it	O
can	O
adjust	O
the	O
properties	O
of	O
what	O
the	O
user	O
has	O
drawn	O
before	O
committing	O
to	O
the	O
layer.4.0.6Updated	O
for	O
Windows	B-Operating_System
10	I-Operating_System
.	O
</s>
<s>
IndirectUI-based	O
effect	O
plugins	B-Application
can	O
now	O
provide	O
help	O
text	O
,	O
accessible	O
via	O
the	O
question	O
mark	O
button.4.0.7Updated	O
for	O
.NET	B-Application
Framework	I-Application
4.6	O
.	O
</s>
<s>
Title	O
bar	O
uses	O
the	O
Windows	B-Operating_System
10	I-Operating_System
accent	O
color	O
.	O
</s>
<s>
Shapes	O
tool	O
rendering	O
performance	O
on	O
CPUs	O
with	O
many	O
cores.4.0.10Added	O
"	O
overscroll	O
"	O
to	O
the	O
editor.4.0.20Updated	O
for	O
.NET	B-Application
Framework	I-Application
4.7.1	O
.	O
</s>
<s>
IndirectUI	O
enhancements.4.2Added	O
HEIF	O
file	O
format	O
support	O
,	O
fixed	O
performance	O
with	O
very	O
large	O
images	O
,	O
and	O
upgraded	O
and	O
modernized	O
the	O
functionality	O
of	O
many	O
existing	O
file	O
types4.2.1Added	O
JPEG	B-Device
XR	I-Device
file	O
format	O
support4.2.2Can	O
open	O
AVIF	O
files	O
(	O
but	O
not	O
saved	O
)	O
,	O
improved	O
DirectDraw	O
Surface	O
support	O
and	O
4-bit	O
saving	O
for	O
PNG/BMP/TIFF4.2.5Added	O
WebP	O
file	O
format	O
support4.2.6Added	O
a	O
"	O
Native	O
pointer	O
input	O
"	O
setting	O
if	O
a	O
"	O
pointer	O
"	O
device	O
is	O
available.4.2.7Fixed	O
a	O
crash	O
at	O
startup	O
(	O
FileLoadException	O
)	O
due	O
to	O
1	O
)	O
the	O
stub	O
for	O
System.Runtime.dll	O
not	O
being	O
updated	O
,	O
and	O
2	O
)	O
the	O
rigid	O
version	O
binding	O
policy	O
that	O
prevented	O
the	O
older	O
version	O
from	O
working	O
in	O
its	O
stead	O
(	O
which	O
would	O
’ve	O
been	O
fine	O
in	O
this	O
case	O
)	O
.4.2.8This	O
small	O
update	O
fixes	O
a	O
few	O
pressing	O
bugs	O
,	O
particularly	O
for	O
touch	O
and	O
pen	O
input.4.2.9This	O
update	O
greatly	O
improved	O
performance	O
and	O
significantly	O
reduced	O
memory	O
usage	O
,	O
added	O
two	O
new	O
translations	O
,	O
and	O
fixed	O
a	O
number	O
of	O
small	O
issues.4.2.10Fixed	O
some	O
important	O
bugs	O
,	O
most	O
notably	O
with	O
installations	O
that	O
directly	O
use	O
the	O
MSI	O
file	O
for	O
deployment.4.2.11Adds	O
XMP	O
metadata	O
support	O
,	O
3	O
new	O
translations	O
,	O
some	O
UI	O
improvements	O
,	O
and	O
several	O
bug	O
fixes.4.3Migrated	O
to	O
.NET	B-Application
5	I-Application
,	O
resulting	O
in	O
improved	O
performance.4.3.3Migrated	O
to	O
.NET	B-Application
6	I-Application
,	O
resulting	O
in	O
improved	O
performance	O
.	O
</s>
<s>
Usage	O
of	O
C#	B-Application
10	O
,	O
three	O
new	O
translations	O
,	O
including	O
Catalan	O
,	O
Corsican	O
,	O
and	O
Thai	O
.	O
</s>
<s>
4.3.4Fixes	O
color	O
picker	O
bug	O
,	O
and	O
legacy	O
plugin	B-Application
issues	O
.	O
</s>
<s>
Support	O
for	O
.NET	B-Application
7	I-Application
.	O
</s>
<s>
Small	O
updates	O
to	O
bundled	O
plugins	B-Application
.	O
</s>
