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Posted to fop-dev@xmlgraphics.apache.org by bu...@apache.org on 2008/09/15 16:11:35 UTC
DO NOT REPLY [Bug 45809] New: PNGs are rendered with dull colors
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
Summary: PNGs are rendered with dull colors
Product: Fop
Version: all
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: images
AssignedTo: fop-dev@xmlgraphics.apache.org
ReportedBy: jean-francois@elfouly.nom.fr
Created an attachment (id=22567)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22567)
A screenshot illustrating the problem
At least some 24-bit PNG files, but probably all of them, are rendered by FOP
with dull colors (see example.png).
This can be seen even in a simple 8 pixel example. The image and its colors are
correct (object 11 in the PDF); and the soft mask too (object 10 in the PDF).
So there could be a problem with the ICC color profile after all (obj 5).
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #14 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-10-12 16:27:56 PST ---
Created an attachment (id=22716)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22716)
Same test case, FOP patched to add /AIS true
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #5 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-15 08:50:34 PST ---
Created an attachment (id=22573)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22573)
The Java source that generated the test image
This is a fully stripped-down version of the custom cockpit-screenshots
generator/editor that is used by our customer. Creates the test image in pretty
much the same technical context as the "real" ones.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #10 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-16 00:43:01 PST ---
Created an attachment (id=22588)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22588)
PDF render with different backgrounds.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #13 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-10-12 16:27:19 PST ---
Created an attachment (id=22715)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22715)
Same test case, FOP patched to add /AIS false
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #7 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-15 08:52:56 PST ---
Created an attachment (id=22574)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22574)
Image dump in the PDF
Exactly what you would expect when reading the java code that generated the
image.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #1 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-15 07:13:00 PST ---
Created an attachment (id=22568)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22568)
FO file
FO source file for the example.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #2 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-15 07:13:34 PST ---
Created an attachment (id=22569)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22569)
The test image.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #11 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-16 00:48:01 PST ---
Also discussed previously (by the same):
http://markmail.org/message/gjrau3dfjmyfhne4
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #3 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-15 07:14:23 PST ---
Created an attachment (id=22570)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22570)
The generated PDF
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #15 from Luis Bernardo <lm...@gmail.com> 2012-03-06 09:43:46 UTC ---
The dull colors are visible in Adobe Reader but not in Evince! Could the issue
be with the viewer?
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #16 from Glenn Adams <gl...@skynav.com> 2012-04-07 01:41:30 UTC ---
resetting P2 open bugs to P3 pending further review
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #12 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-10-12 16:26:09 PST ---
Playing with the AIS (Alpha Is Shape) parameter in the Graphics state does not
fix the problem.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #8 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-15 08:54:21 PST ---
Created an attachment (id=22575)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22575)
Soft mask dump from the PDF
Says in a rather straight manner that the thrid pixel is transparent and the
rest is opaque; which is also what one would expect when reading the java
source or looking at the PNG file at the bit level.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
Glenn Adams <gl...@skynav.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P2 |P3
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #6 from Jeremias Maerki <je...@apache.org> 2008-09-15 08:51:46 PST ---
For reference: http://markmail.org/message/ykcb7re4bm4xyufs
The thread contains some initial analysis of the problem but no solution, yet.
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #9 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-16 00:42:28 PST ---
Created an attachment (id=22587)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22587)
Test case with changing background
Reading the chapter 7 (Transparency) of PDF 1.4 specification, I understood
transparency is much about blending. So I tried the render with different color
backgrounds but there seems to be no influence...
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DO NOT REPLY [Bug 45809] PNGs are rendered with dull colors
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=45809
--- Comment #4 from Jean-François El Fouly <je...@elfouly.nom.fr> 2008-09-15 08:35:59 PST ---
Created an attachment (id=22572)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22572)
The PDF obtained without a soft mask
This PDF is generated without a PDF soft mask by commenting out this.softmask
=... in ImageRenderedAdapter.java:102
The colors are now bright and the PDF no longer has a soft mask bound to the
image. But the third pixel from the left is now rendered opaque, while it
should be completely transparent (thus, gray here).
It's hard to understand whether the soft mask is conceptually "on top" of the
image (thus, making the colors dull by interposing a sort of "veil") or related
to the image transparency, thus between the image and the media ?
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