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Posted to fop-dev@xmlgraphics.apache.org by bu...@apache.org on 2008/03/25 20:06:54 UTC
DO NOT REPLY [Bug 44672] New: Right aligned text within table cells
is not correctly aligned using PCL
https://issues.apache.org/bugzilla/show_bug.cgi?id=44672
Summary: Right aligned text within table cells is not correctly
aligned using PCL
Product: Fop
Version: 1.0dev
Platform: All
OS/Version: All
Status: NEW
Severity: regression
Priority: P2
Component: pcl
AssignedTo: fop-dev@xmlgraphics.apache.org
ReportedBy: olsonw@richer.ca
Summary:
--------
When printing right aligned content in a table, the PCL renderer does not
correctly align the content. This worked in 0.20.5, but is broken in all 0.9x
releases which I tested, including current trunk. It appears that the longer
the content string is, the more the output is offset to the left. This only
affects PCL; PDF output is correct.
Steps to Reproduce:
-------------------
1) Download attachment test.fo
2) Run command './fop -fo test.fo -pdf test.pdf' to get a benchmark of what the
output is supposed to look like.
3) Run command './fop -fo test.fo -pcl test.pcl' to generate the incorrect
output.
4) Print this file using the command 'lpr test.pcl' (this assumes that you have
a default printer set up, which accepts PCL documents).
Observed Results:
-----------------
Compare the printout and the PDF file. Note that in the PDF, the right aligned
content is all aligned correctly. In the PCL file, some of the lines are
offset to the left. It appears to me from testing that the longer the text is,
the further it is offset.
Desired Results:
----------------
The PCL output should look the same as PDF: the right aligned text should truly
be right aligned.
Further Notes:
--------------
I looked through the source, but was not able to find where this is handled.
If someone could give me a pointer to a few classes which may contain the bug,
I would be willing to give this a shot myself.
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DO NOT REPLY [Bug 44672] Right aligned text within table cells is
not correctly aligned using PCL
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=44672
Glenn Adams <gl...@skynav.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #5 from Glenn Adams <gl...@skynav.com> 2012-04-01 13:52:17 UTC ---
batch transition to closed remaining pre-FOP1.0 resolved bugs
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DO NOT REPLY [Bug 44672] Right aligned text within table cells is
not correctly aligned using PCL
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=44672
Wyatt <ol...@richer.ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |olsonw@richer.ca
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DO NOT REPLY [Bug 44672] Right aligned text within table cells is
not correctly aligned using PCL
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=44672
--- Comment #2 from Jeremias Maerki <je...@apache.org> 2008-03-25 13:01:14 PST ---
Created an attachment (id=21714)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=21714)
Some demo output (made from PCL output by GhostPCL)
I can't see exactly what you described. In my tests some of the right-most
characters are slightly shifted to the right and into the border I made around
the table to get some boundaries. I've enhanced your example a bit and attached
the resulting TIFF here. This first part uses "Helvetica" which is mapped to a
PCL standard font (text-rendering set to "auto") and the second part uses a
TrueType font ("DejaVu Serif") which is painted using bitmaps. You can see that
in the second part there are no such effects.
The problem is the following: We don't have the exact font metrics of those
native PCL fonts. They may even be different from printer to printer which
would explain your different results. So the result is just an approximation
for the case where a native PCL font is used. The good thing about the native
font is a smaller PCL file but obviously, it comes with a downside.
Fortunately, there is a setting where you can force FOP to output all fonts
using bitmaps which should make your problem go away. See the "text-rendering"
setting in http://xmlgraphics.apache.org/fop/0.95/output.html#pcl-configuration
(you need to switch from "auto" to "bitmap")
The alternative would be to implement TrueType font embedding support for the
PCL renderer but I've looked into this and it looks very complicated. As a
side-note: Even most Windows PCL printer drivers generate all text as bitmaps
rather than PCL text.
Anyway, you've asked for pointers into the code:
org.apache.fop.render.pcl.PCLRenderer, method renderText(TextArea)
The local variable "pclFont" determines whether the text is painted as PCL text
or as bitmaps.
HTH
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DO NOT REPLY [Bug 44672] Right aligned text within table cells is
not correctly aligned using PCL
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=44672
--- Comment #1 from Wyatt <ol...@richer.ca> 2008-03-25 12:10:58 PST ---
Created an attachment (id=21713)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=21713)
Test file for right alignment issue
This is the test file which demonstrates the right alignment issue in PCL
output.
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DO NOT REPLY [Bug 44672] Right aligned text within table cells is
not correctly aligned using PCL
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=44672
Jeremias Maerki <je...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |WORKSFORME
--- Comment #4 from Jeremias Maerki <je...@apache.org> 2008-03-25 13:52:33 PST ---
(In reply to comment #3)
<snip/>
> I'm still
> not sure why 0.20.5 works; perhaps it defaults to bitmapped output?
No, it always uses native PCL text. Not sure why it's good there. Maybe the
lack of kerning support reduces the negative effects.
<snip/>
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DO NOT REPLY [Bug 44672] Right aligned text within table cells is
not correctly aligned using PCL
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=44672
--- Comment #3 from Wyatt <ol...@richer.ca> 2008-03-25 13:30:39 PST ---
That makes perfect sense about not knowing the font metrics for each device,
and explains why we are seeing different results. I have tried using the
bitmap output, and it works perfectly. As far as I am concerned, this is a
valid workaround, and I agree with you that it would be just about impossible
to get this to work for all printers without some more information. I'm still
not sure why 0.20.5 works; perhaps it defaults to bitmapped output?
I would be fine with closing this ticket as a successful workaround. If there
is nothing else which anyone wants to add, I will go ahead and do so.
Thanks again for your speedy and excellent response!
Cheers
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