Exporting to PDF problems (reduced opacity + filter effect)

Bug #381677 reported by Jaromir Coufal on 2009-05-29
This bug affects 3 people
Affects Status Importance Assigned to Milestone

Bug Description

When I am exporting *.svg file from Inkscape (win32build version Inkscape21345-0905140303.7z) to PDF 1.4, and I have transparent objects as you can see on the attached file, exported PDF file has different transparency than original from inkscape. (some objects are as transparent as they are not visible more...)

tags: added: pdf
Pablo Trabajos (pajarico) wrote :

Can't reproduce on Win XP, 0.47-pre1. We need you to attach the SVG file from which you're exporting the PDF. You might want to attach the PDF too. It's impossible to determine what kind of shape and/or attributes of the object are causing this without those files.

Changed in inkscape:
status: New → Incomplete

i added necessary materials...

su_v (suv-lp) wrote :

reproduced with Inkscape 0.47+devel r9424 on OS X 10.5.8

after removing the filter effects (Gaussian Blur) from the objects they are visible in the exported PDF even though their opacity (10%) has not been changed -> this bug seems more related to rasterizing filter effects on export to PDF.

tags: added: exporting filters-svg
Changed in inkscape:
importance: Undecided → Medium
status: Incomplete → Confirmed
su_v (suv-lp) wrote :

Removing the object opacity and adding transparency in the filter effect (using Color matrix) produces a PDF out put close to the rendering of the SVG in Inkscape.

su_v (suv-lp) wrote :
su_v (suv-lp) wrote :

… above result indicates to me that the combination of object opacity and rasterized filter effects doesn't work well in PDF export.


Inkscape ver.: Inkscape 0.48.0 r9654 on Mac OS 10.4.11 / PowerPC

Here are more example files for this issue. When exporting to pdf, the image plane (shaded parallelogram in the middle) will appear in the pdf if the opacity is set to 100%, but it will not appear in the pdf if opacity is set to 99%.

su_v (suv-lp) wrote :

@Chas - what PDF viewer do you use? In both of your PDF file the image plane is visible when viewing them in Apples's Preview on OS X 10.5.8.

There is a problem when reopening the PDFs in Inkscape, but it is not related to the issue described here ( bug #381677):
The plane with reduced opacity in the second PDF is imported as a clipped pattern (as opposed to the one with 100%) and only partially or randomly (depending e.g. on zoom level) visible, a known issue recently reported in

Bug #643093 “In imported PDF, some objects not rendered / partially rendered”:

and the underlying cause a long-standing bug:
Bug #168014 in Inkscape: “Redraw fails with clipped object patterns”:

su_v (suv-lp) on 2011-03-06
summary: - Exporting to PDF problems (transparency)
+ Exporting to PDF problems (reduced opacity + filter effect)

more examples at this bug (sorry for the dupe, search function didn't pick this one up..):
Additional error cases include masked objects, etc.

su_v (suv-lp) wrote :

New duplicate bug #828844 provides a reduced test case:
(reproduced with Inkscape 0.48+devel r10554 on Mac OS X 10.5.8 (i386))

tags: added: blur
tags: added: transparency
su_v (suv-lp) on 2012-02-16
tags: removed: blur transparency
Sparhawk (sparhawkthesecond) wrote :

Sorry, do those tags relate to a technical meaning? I just added them to prevent further duplicates, since nothing came up when both Thomas and I searched.

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