Layer blend modes applied in inkscape but not in PDF export

[jonj]

How to reproduce:
import a PDF file into inkscape
create a new layer
import a greyscale TIFF file with a white background
change the new layer blend mode to darken
 - the result looks perfect in inkscape with the white background of the TIFF not obscuring the background layer

However when printed, or saved as a PDF, the DARKEN mode has no effect and the tiff layer obscures the background layer.

Observed with inkscape 0.48 on Mac OS 10.6

[su_v (suv-lp)]

Reproduced with Inkscape 0.48.2 and 0.48+devel r10630 (cairo 1.10.2) on Mac OS X 10.5.8 (i.386)

Reduced test case attached (error does not depend on importing PDF or embedding a special bitmap image (greyscale TIFF)).

[su_v (suv-lp)]

Exported bitmap

[su_v (suv-lp)]

Exported PDF (0.48+devel r10630, cairo 1.10.2)

[su_v (suv-lp)]

reference (PNG exported with Squiggle (Batik 1.7))

[su_v (suv-lp)]

Also reproduced with Inkscape 0.47, 0.48.0 and 0.48.1 -> no recent regression.

[su_v (suv-lp)]

Also affects PS/EPS export.

[Christian Mertes (cmertes)]

Just wanted to add that it's not just the "darken" blend modes doesn't get exported to PDF. It at least also affects "screen" and if I had to wager, I'd say all blend modes except for "normal" are just stripped away in the export process.

[Nathan Lee (nathan.lee)]

Closing because issue has been moved to gitlab (see https://gitlab.com/inkscape/inbox/issues/771). As part of the bug migration, we are manually migrating bugs over to gitlab and closing them here (http://alpha.inkscape.org/bug-migration/)

Closed by: https://gitlab.com/nathanal