SVG fill pattern lost on PDF export (cairo >= 1.12)

[Joachim Breitner]

As the summary says: I have an SVG file using a pattern, but when I export it to PDF, the pattern is lost. Attaching example SVG file. This is version 0.48.5.

Thanks,
Joachim

=====
Related newer reports:
Bug #1437726: Pattern fill incomplete with PDF export and printing
Bug #1441753: Patterns not exporting correctly to PDF
Bug #1462589: When saving to pdf at certain page size, a pattern disappears.
Bug #1488129: Pattern not exported to pdf or printed (cairo >= 1.12)
Bug #1597955: pattern fill not saved to pdf correctly

[su_v (suv-lp)]

Please add information about OS/platform to the bug description and also attach the PDF file saved with Inkscape.

[Joachim Breitner (nomeata)]

This is on Debian.

Might be a duplicate of #1314720, although that talks about text pattern fills.

[Vit Smilauer (smilauer)]

I encountered a similar problem when exporting to pdf. When a pattern is created from one object, Ubuntu and Windows version of Inkscape 0.91+devel creates a good pdf file. However, when creating a pattern from two objects and exporting to pdf, the pattern is lost - this is true for both Ubuntu and Windows version. A certain and limited workaround is combining two objects into a single object (Path->Combine) where pdf export works fine. Attached is a svg file showing the bug.

[su_v (suv-lp)]

Testing PDF export of 'bug-pattern.svg' on OS X 10.7.5:
not reproduced with :
- Inkscape 0.47 r22583 (cairo 1.8.8)
- Inkscape 0.48.0 r9654 (cairo 1.8.10)
- Inkscape 0.48.1 r9760 (cairo 1.10.2)
- Inkscape 0.48.2 r9819 (cairo 1.10.2) (official package)
reproduced with:
- Inkscape 0.48.2 r9819 (cairo 1.12.2) (local build)
- Inkscape 0.48.3.1 r9886 (cairo 1.12.2)
- Inkscape 0.48.4 r9939 (cairo 1.12.2)
- Inkscape 0.48.5 r10040 (cairo 1.12.16)
- Inkscape 0.91+devel r13863 (cairo 1.14.0)

not reproduced with:
- rsvg-convert (librsvg 2.36.3, cairo 1.12.2)
- rsvg-convert (librsvg 2.40.6, cairo 1.14.0)

The results might indicate that this is a problem related to upstream
changes in cairo between 1.10 and 1.12 (output of Inkscape 0.48.2
differs depending on cairo version). But on the other hand, rsvg-convert
from librsvg doesn't expose the same issue (all patterns exported as
expected).

Based on local tests, it doesn't matter whether the objects are grouped
inside the pattern definition (one object with several child elements)
or not (multiple top-level elements inside the pattern definition), see
new test cases attached.

Possibly interesting detail with new test case: if the drawing is scaled
up via <svg> width, height (viewBox unchanged), then at least the first
object of the patterns with multiple SVG objects in the pattern
definition does get rendered visible in the PDF file.