<s>
dvipng	B-General_Concept
is	O
a	O
cross-platform	B-Operating_System
program	O
for	O
converting	O
the	O
DVI	B-Application
output	O
of	O
the	O
TeX	B-Application
typesetting	O
system	O
into	O
PNG	O
image	O
format	O
.	O
</s>
<s>
Dvipng	B-General_Concept
was	O
written	O
by	O
Jan-Åke	O
Larsson	O
.	O
</s>
<s>
The	O
traditional	O
TeX82	O
outputs	O
device	B-Operating_System
independent	I-Operating_System
(	O
DVI	B-Application
)	O
files	O
,	O
which	O
as	O
the	O
name	O
implies	O
,	O
are	O
intended	O
to	O
be	O
independent	B-Operating_System
of	I-Operating_System
the	I-Operating_System
output	I-Operating_System
device	I-Operating_System
,	O
but	O
do	O
not	O
embed	O
the	O
actual	O
fonts	O
.	O
</s>
<s>
As	O
such	O
,	O
DVI	B-Application
files	O
are	O
not	O
suitable	O
for	O
use	O
by	O
web	B-Application
browsers	I-Application
,	O
and	O
a	O
conversion	O
program	O
is	O
needed	O
to	O
translate	O
from	O
a	O
DVI	B-Application
file	O
to	O
an	O
image	O
.	O
</s>
<s>
Dvipng	B-General_Concept
renders	O
the	O
font	O
glyphs	O
into	O
the	O
images	O
,	O
for	O
example	O
using	O
FreeType	B-Application
when	O
available	O
.	O
</s>
<s>
Although	O
it	O
is	O
possible	O
to	O
generate	O
web	O
graphics	O
using	O
other	O
DVI	B-Application
backends	O
such	O
as	O
dvips	B-Language
followed	O
by	O
a	O
PostScript-to-image	O
converter	O
like	O
ImageMagick	B-Language
,	O
using	O
dvipng	B-General_Concept
requires	O
fewer	O
programs	O
to	O
be	O
run	O
.	O
</s>
<s>
Dvipng	B-General_Concept
is	O
used	O
as	O
the	O
default	O
rendering	O
method	O
for	O
MediaWiki	B-Application
software	I-Application
,	O
as	O
of	O
version	O
1.8.0	O
.	O
</s>
<s>
It	O
is	O
also	O
included	O
in	O
the	O
TeXLive	B-General_Concept
distribution	O
and	O
several	O
Linux	B-Application
distributions	O
.	O
</s>
<s>
Dvipng	B-General_Concept
is	O
released	O
under	O
the	O
GNU	B-Application
LGPL	I-Application
.	O
</s>
<s>
To	O
use	O
dvipng	B-General_Concept
at	O
its	O
simplest	O
,	O
simply	O
type	O
dvipng	B-General_Concept
foo	O
where	O
foo.dvi	O
is	O
the	O
output	O
of	O
TEX	B-Application
that	O
you	O
want	O
to	O
convert	O
to	O
PNG	O
format	O
.	O
</s>
<s>
If	O
there	O
are	O
four	O
pages	O
in	O
foo.dvi	O
,	O
those	O
pages	O
will	O
be	O
output	O
as	O
foo1.png	O
,	O
foo2.png	O
,	O
foo3.png	O
,	O
and	O
foo4.png	O
,	O
respectively	O
.	O
</s>
<s>
If	O
you	O
have	O
enabled	O
the	O
PostScript	B-Language
font	O
support	O
(	O
via	O
FreeType	B-Application
)	O
,	O
fonts	O
will	O
be	O
rendered	O
as	O
they	O
are	O
needed	O
.	O
</s>
<s>
Otherwise	O
,	O
dvipng	B-General_Concept
will	O
use	O
bitmapped	O
(	O
PK	O
)	O
fonts	O
,	O
and	O
if	O
you	O
use	O
PK	O
fonts	O
that	O
have	O
not	O
been	O
used	O
on	O
your	O
system	O
before	O
,	O
they	O
may	O
be	O
automatically	O
generated	O
;	O
this	O
process	O
can	O
take	O
a	O
few	O
minutes	O
,	O
so	O
progress	O
reports	O
appear	O
by	O
default	O
.	O
</s>
<s>
(	O
If	O
dvipng	B-General_Concept
tries	O
to	O
endlessly	O
generate	O
the	O
same	O
fonts	O
over	O
and	O
over	O
again	O
,	O
something	O
is	O
wrong	O
.	O
</s>
<s>
For	O
a	O
brief	O
summary	O
of	O
available	O
options	O
,	O
just	O
type	O
dvipng	B-General_Concept
--help	O
.	O
</s>
