Bug 757356 - png conversion is wrong
Summary: png conversion is wrong
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Fedora
Classification: Fedora
Component: ImageMagick
Version: 16
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Pavel Alexeev
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-11-26 17:07 UTC by Need Real Name
Modified: 2011-12-11 15:57 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-12-11 15:57:29 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)
q.png (218.49 KB, image/png)
2011-11-26 17:10 UTC, Need Real Name 		no flags Details
a.jpg (201.89 KB, image/jpeg)
2011-11-26 17:11 UTC, Need Real Name 		no flags Details
b.jpeg (155.10 KB, image/jpeg)
2011-11-26 17:12 UTC, Need Real Name 		no flags Details
View All

Description Need Real Name 2011-11-26 17:07:50 UTC 
when converting 
convert -verbose  /tmp/a.png /tmp/a.jpg
/tmp/a.png PNG 567x794 567x794+0+0 8-bit DirectClass 224KB 0.000u 0:00.009
/tmp/a.png=>/tmp/a.jpg PNG 567x794 567x794+0+0 8-bit GrayscaleMatte DirectClass 205KB 0.020u 0:00.019

the resulting a.jpg is negative
Comment 1 Need Real Name 2011-11-26 17:10:32 UTC 
Created attachment 536813 [details]
q.png

rpm -qf `which convert`
ImageMagick-6.6.5.10-20.fc15.x86_64

Same thing with 
pngtopnm /tmp/a.png  |pnmtojpeg >/tmp/b.jpeg

rpm -qf `which pngtopnm`
netpbm-progs-10.56.04-1.fc15.x86_64
Comment 2 Need Real Name 2011-11-26 17:11:01 UTC 
Created attachment 536814 [details]
a.jpg
Comment 3 Need Real Name 2011-11-26 17:12:00 UTC 
Created attachment 536815 [details]
b.jpeg

pngtopnm /tmp/a.png  |pnmtojpeg >/tmp/b.jpeg

rpm -qf `which pngtopnm`
netpbm-progs-10.56.04-1.fc15.x86_64
Comment 4 Need Real Name 2011-11-26 17:13:43 UTC 
Interestingly, firefox shows a.png correctly,
but document viewer does not
Comment 5 Need Real Name 2011-11-27 08:23:32 UTC 
Same thing with 
rpm -qf `which convert`
ImageMagick-6.7.1.9-1.fc15.x86_64
Comment 6 Pavel Alexeev 2011-12-11 15:57:29 UTC 
Thank you for your bugreport and willing make free software better!

Reported upstream: http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=19984

We close bug now, as it related to upstream developing. But we continue track changes and whatever it will be fixed ve consider make update in Fedora.
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