Differences between version 10 and predecessor to the previous major change of PNG.
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| Newer page: | version 10 | Last edited on Sunday, November 21, 2004 2:57:50 pm | by AristotlePagaltzis | Revert |
| Older page: | version 2 | Last edited on Thursday, June 5, 2003 12:13:41 am | by PerryLorier | Revert |
@@ -1,5 +1,7 @@
-Short
for Portable Network Graphics, and pronounced
ping, a new bit-mapped graphics format similar to GIF. In fact, PNG was approved as a standard by the World Wide Web consortium to replace GIF because GIF uses a patented data compression algorithm called LZW. In contrast, PNG is completely patent- and license-free
. The most recent versions of NetscapeNavigator and Microsoft InternetExplorer now support PNG
+An [Acronym]
for __P__ortable __N__etwork __G__raphics. Pronounced "
ping"
.
-PNG is an
[Acronym
]
+A modern, losslessly compressed bitmapped graphics FileFormat, designated by the [W3C] as the successor of the [GIF] format. [
PNG]
is completely unencumbered with patents and licensing fees. This is important, as [GIF] has had problems in that regard (see [Unisys]). There is builtin support for [PNG] in [Mozilla] and
[Opera
].
-InternetExplorer doesn't
support alpha channels. Rumours include
that the IE engine is pretty
old an out of date
and can't
support it
without lots of hidious
hacks.
Amusingly, while Microsoft
can't make these hidious
hacks, we can. Here's a site that explains how to properly render PNG's in IE
with alpha transparency:
http://redvip
.homelinux
.net/varios
/explorer-png-en
.html
+Recent versions of
InternetExplorer display [PNG] images as well, however this browser does not
support alpha channels natively
. Rumour has it
that the IE engine is too
old and outdated to
support transparency
without lots of hideous
hacks. Amusingly(?)
, while MicrosoftCorporation
can't make these hideous
hacks, they [tell us how
we can | http://support
.microsoft.com/default.aspx?scid=kb;en-us;Q294714]. Not surprisingly, their approach is completely incompatible
with every other browser on the world, you should use [a slightly different method |
http://webfx
.eae
.net/dhtml
/pngbehavior/pngbehavior
.html].
+
+pngcrush(1) is a [Free] utility to shrink your [PNG] images as much as possible, either losslessly or lossily depending on arguments.
