https://issues.apache.org/bugzilla/show_bug.cgi?id=49233
Summary: conversion B&W GIF=>PDF creates PDF with colorspace
RGB if FOP0.95 and Gray if FOP0.20.5
Product: Fop
Version: 0.95
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: awt renderer
AssignedTo: fop-dev@xmlgraphics.apache.org
ReportedBy: isid...@juno.com
Even though the PDFs obtained with both FOP versions look and print OK, when
the one created with 0.95 is pushed through the FAX system, the image obtained
contains dotted areas that correspond to white areas in the PDF created with
0.20.5.
I posted the question to FOP forum and Jeremias Maerki helped me research the
issue. If the PDF with problems is manipulated by :
changing /ColorSpace [/Indexed /DeviceRGB 1 <FFFFFF000000>]
to:
/ColorSpace [/Indexed /DeviceGray 1 <FF00>
the dotted areas go back to be white areas. i.e. the problem is resolved by
this change
When I asked him if I could make this change in colorspace from inside my
XSL-FO he responded:
"If you want this kind of functionality, it has to be fixed in Java code
first.If you want to give this a try, the place to fix this is:
org.apache.fop.render.pdf.ImageRenderedAdapter.populateXObjectDictionary(PDFDictionary)
There, a check has to be implemented to see if all palette entries are
plain grayscale values (red, green and blue all the same) in which case
/DeviceGray can be specified instead of /DeviceRGB. And of course, the
palette entries need to be 8bit rather than 24bits then."
My expertise in manipulating colors and graphics is not big enough for me to
make changes to this code. So, I hope someone with more knowledge could fix
this bug.
Thank you
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