[Poppler-bugs] [Bug 68986] pdftoppm doesn't render eci_altona-test-suite-v2_technical2_x4.pdf correctly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68986

Thomas Freitag <Thomas.Freitag at alfa.de> changed:

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  Attachment #87237|0                           |1
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--- Comment #12 from Thomas Freitag <Thomas.Freitag at alfa.de> ---
Created attachment 87453
  --> https://bugs.freedesktop.org/attachment.cgi?id=87453&action=edit
correction for knockout transparency groups

Working on a patch for test "G" I encountered, that there is still a problem
with knockout transparency groups namely if they are combined with the isolated
option. So I solved that first, and so here the new corrected patch.
Because of the changes I made a new regression test against actual git master,
and the only relevant (visible) changes I encountered are on this PDF.
For a better recognition of the changes I used another version of this altona
PDF: eci_altona-test-suite-v2_technical2_one-patch-per-page_x4.pdf (available
on the same URL). The changes are here on page 3, 7 and 14. 3 and 7 are okay
because that's what my patch is for, and the changes on page 14 are in the
center of the image, but the look and feel is still well enough in my eyes and
the output is quite near to the reference image.

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