EMF clipping of bitmaps is broken

[David Mathog]

Follow-up report to:
Bug #1419686 “emf-export renders transparent image areas black”

EMF output support for clipping of paths is working fairly well but it seems that clipping of bitmaps is broken. Moreover, clipping of paths also breaks if the same clipping object clips an image. Examples attached.

This is trunk revision 13841.

[David Mathog (mathog)]

Fix committed in revision 13914. Clipping export now works in EMF for text, paths, gradients, and images. One level of clipping only though!

Note, WMF does not export clipping at all. WMF support for clipping is so limited, and the need to export to WMF so rare, that it wasn't worth the effort. Clipped objects may be imported via WMF.

[David Mathog (mathog)]

I fixed these clipping issues in trunk. If the OP builds from revision 13914 or higher it should be possible to use clipping to emulate the transparency effect in the first example.

[su_v (suv-lp)]

Adding tag 'backport-proposed' for the stable release branch <lp_inkscape/0.91.x> (needs testing).

[Martin Owens (doctormo)]

This patch is already in 0.92

[Matthew Swabey (mattaw)]

Unfortunately this bug doesn't appear squashed:

Workflow is Inkscape 0.92.0 r15299 --emf--> Word 2016.

Attached is a zip of an SVG, EMF and PNG screen clip of result.

Of course it could be Word that is broken but I can't figure that out with my current skill level.

[David Mathog (mathog)]

Trunk r15387 works correctly for me, see reduced size test case.

Try that sample, just in case, although I expect it will also fail with the Inkscape version you used. My best guess is that the 0.92.0 version you have does not have this patch. Bryce or Martin, please test with your 0.92.0 release versions and post the revision number on it if it works.

[Matthew Swabey (mattaw)]

So danced the dance and you were right.

0.92.0 r15299 svg --emf--> word of reduced size test: Fail, clipping not applied.
Your clip_test.emf --> word test: Success, clipping applied.

I await instructions as I don't want to bootstrap an Inkscape build environment on my windows box unless I really really have to as it will probably be an awful hassle due to Microsoft reasons.

[Matthew Swabey (mattaw)]

Any thoughts on the best way to proceed to get a fixed version?

[David Mathog (mathog)]

Try

   http://download.tuxfamily.org/inkscape/

The most recent 32 bit version is

   inkscape-0.92.x-15346-win32.7z