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Posted to batik-dev@xmlgraphics.apache.org by bu...@apache.org on 2009/03/27 18:28:58 UTC
DO NOT REPLY [Bug 43847] PNG export: indexed option doesn't work
https://issues.apache.org/bugzilla/show_bug.cgi?id=43847
Helder Magalhães <he...@gmail.com> changed:
What |Removed |Added
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Attachment #21117|0 |1
is obsolete| |
--- Comment #6 from Helder Magalhães <he...@gmail.com> 2009-03-27 10:28:56 PST ---
Created an attachment (id=23423)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=23423)
Patch v2
(In reply to comment #0)
> This is because KEY_INDEXED is set to 256 while it seems to be expected
> to be 8 if the number of palette entries should be 256 = 2^8.
> A value of 256 will be ignored in
> sources/org/apache/batik/ext/awt/image/codec/png/PNGTranscoderInternalCodecWriteAdapter.java
I've (also) confirmed this in the source code
(org.apache.batik.transcoder.image.PNGTranscoder.WriteAdapter#writeImage). The
attachment is very similar to the current one, but additionally fixes a few
indenting issues and removes some weird "By Jun Inamori" statements (which
apparently shouldn't be there) and also some extraneous line breaks.
> I'll post a simple patch, but the indexed option is still quite unusable
> because it dithers a white background, even if only one other color is used.
I haven't tried to improve this behavior...
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