<s>
MuPDF	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
software	I-License
framework	B-Architecture
written	O
in	O
C	B-Language
that	O
implements	O
a	O
PDF	B-Application
,	O
XPS	B-Device
,	O
and	O
EPUB	O
parsing	O
and	O
rendering	O
engine	O
.	O
</s>
<s>
The	O
focus	O
of	O
MuPDF	B-Language
is	O
on	O
speed	O
,	O
small	O
code	O
size	O
,	O
and	O
high-quality	O
anti-aliased	O
rendering	O
.	O
</s>
<s>
Since	O
the	O
1.2	O
release	O
,	O
MuPDF	B-Language
has	O
optional	O
support	O
for	O
interactive	O
features	O
such	O
as	O
form	O
filling	O
,	O
JavaScript	B-Language
and	O
transitions	O
.	O
</s>
<s>
The	O
library	O
ships	O
with	O
a	O
rudimentary	O
X11	B-Operating_System
and	O
Windows	B-Application
viewer	O
,	O
and	O
a	O
set	O
of	O
command-line	O
tools	O
for	O
batch	O
rendering	O
(	O
mutool	O
draw	O
)	O
,	O
examining	O
the	O
file	O
structure	O
(	O
mutool	O
show	O
)	O
,	O
and	O
rewriting	O
files	O
(	O
mutool	O
clean	O
)	O
.	O
</s>
<s>
Later	O
versions	O
also	O
have	O
a	O
JavaScript	B-Language
interpreter	O
(	O
mutool	O
run	O
)	O
that	O
allows	O
running	O
scripts	O
to	O
create	O
and	O
edit	O
PDF	B-Application
files	I-Application
.	O
</s>
<s>
A	O
number	O
of	O
free	O
software	O
applications	O
use	O
MuPDF	B-Language
to	O
render	O
PDF	B-Application
documents	I-Application
,	O
the	O
most	O
notable	O
being	O
Sumatra	B-Language
PDF	I-Language
.	O
</s>
<s>
MuPDF	B-Language
is	O
also	O
available	O
as	O
a	O
package	O
for	O
most	O
Unix-like	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
distributions	O
.	O
</s>
<s>
Independent	O
parties	O
have	O
ported	O
the	O
library	O
to	O
many	O
platforms	O
,	O
including	O
the	B-General_Concept
Amazon	I-General_Concept
Kindle	I-General_Concept
,	O
HP	B-Application
TouchPad	I-Application
,	O
PlayStation	B-Operating_System
Portable	I-Operating_System
,	O
Wii	B-Operating_System
,	O
and	O
DOS	B-Device
.	O
</s>
<s>
In	O
2002	O
,	O
Tor	O
Andersson	O
started	O
work	O
on	O
MuPDF	B-Language
based	O
on	O
the	O
Libart	B-Language
rendering	O
library	O
by	O
Raph	O
Levien	O
.	O
</s>
<s>
After	O
Artifex	B-Language
Software	I-Language
acquired	O
the	O
MuPDF	B-Language
project	O
,	O
the	O
development	O
focus	O
shifted	O
on	O
writing	O
a	O
new	O
modern	O
graphics	O
library	O
called	O
Fitz	O
.	O
</s>
<s>
Fitz	O
was	O
originally	O
intended	O
as	O
an	O
R&D	O
project	O
to	O
replace	O
the	O
aging	O
Ghostscript	B-Language
graphics	O
library	O
,	O
but	O
has	O
instead	O
become	O
the	O
rendering	O
engine	O
powering	O
MuPDF	B-Language
.	O
</s>
<s>
In	O
2005	O
,	O
the	O
first	O
version	O
of	O
MuPDF	B-Language
with	O
the	O
new	O
Fitz	O
library	O
was	O
released	O
.	O
</s>
<s>
In	O
2009	O
,	O
Artifex	B-Language
Software	I-Language
filed	O
a	O
copyright	O
infringement	O
lawsuit	O
against	O
Palm	O
,	O
Inc	O
.	O
for	O
violating	O
their	O
copyrights	O
on	O
MuPDF	B-Language
.	O
</s>
<s>
At	O
that	O
time	O
Artifex	O
offered	O
MuPDF	B-Language
dual-licensed	B-License
,	O
either	O
under	O
GPLv2	B-License
or	O
under	O
a	O
proprietary	O
license	O
meant	O
by	O
Artifex	O
for	O
commercial	O
use	O
.	O
</s>
<s>
When	O
Palm	O
included	O
MuPDF	B-Language
in	O
webOS	B-Operating_System
and	O
complied	O
with	O
GPLv2	B-License
by	O
releasing	O
the	O
changed	O
source	O
code	O
of	O
the	O
library	O
,	O
Artifex	O
claimed	O
that	O
the	O
GPL	B-License
version	O
would	O
be	O
unsuitable	O
for	O
"	O
commercial	O
use	O
"	O
as	O
the	O
complete	O
,	O
aggregated	O
product	O
(	O
PDFviewer	O
,	O
WebOS	B-Operating_System
)	O
would	O
have	O
to	O
be	O
placed	O
under	O
GPL	B-License
.	O
</s>
<s>
In	O
2011	O
,	O
support	O
for	O
Microsoft	O
's	O
XPS	B-Device
was	O
added	O
,	O
based	O
on	O
code	O
from	O
the	O
GhostXPS	B-Language
library	O
.	O
</s>
<s>
Since	O
February	O
2013	O
,	O
with	O
the	O
1.2	O
release	O
,	O
licensing	B-License
terms	O
have	O
changed	O
from	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
to	O
GNU	B-Application
Affero	I-Application
General	I-Application
Public	I-Application
License	I-Application
v3	I-Application
.	O
</s>
