Indexed PNG Export with Alpha/Semi Transparency

Bug #172138 reported by Topmonkey on 2007-09-23
2
Affects Status Importance Assigned to Milestone
Inkscape
Wishlist
Unassigned

Bug Description

I am a web designer who now uses Inkscape extensively because of it's great
features, ease of use and in my opinion, it's better than Fireworks.
However, it seems there is one particularly useful feature that Fireworks
can do, but Inkscape can't. :-(

Take a look at this:
http://www.sitepoint.com/forums/showthread.php?t=503781

What are the chances of this kind of PNG export being included in Inkscape?

Jon A. Cruz (jon-joncruz) wrote :

Originator: NO

Well... there is a problem with that threads clumping things into png8 and
png32. The PNG spec actually allows for five different types, with
"indexed" being one, and the type supporting "png32" ranges from "PNG4" bit
to "PNG64" bit.

Going to indexed PNG (what that thread calls PNG8) takes color reduction,
dithering, and other lossy and subjective changes (consider the complexity
in my first bit of info there). A dedicated bitmap tool like GIMP or
ImageMagick does better to do such.

Jon A. Cruz (jon-joncruz) wrote :

Originator: NO

(fixing the title from "PNG8" to "Indexed PNG" to more accurately describe
the problem)

Topmonkey (topmonkey) wrote :

Originator: YES

I have tried using GIMP but still the same - you cannot use two colors in
the chunk for transparency. The whole point is so that say, a shadow or
glow effect will be displayed accurately in IE7 and Firefox but it will
render like a GIF in IE6.

nightrow (jb-benoit) on 2007-12-19
Changed in inkscape:
importance: Low → Wishlist
status: New → Confirmed
jazzynico (jazzynico) on 2010-06-12
tags: added: bitmap
removed: other
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