Ubuntu
poppler package

Transparant images are shown with a black background

Bug #6248 reported by Pascal de Bruijn on 2005-12-28

Affects		Status	Importance	Assigned to	Milestone
	poppler (Ubuntu)	Fix Released	Medium	Unassigned

Bug Description

I created a PDF with a transparant PNG embedded in it:

http://www.xs4all.nl/~bruijn9/temp/test_transparent_png_background.pdf

Using Evince on Ubuntu Breezy Badger, the image is shown with a black background.

I had a friend check the file on Mac OS X, and it displayed correctly there, so it's most probably a bug in Evince...

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Pascal de Bruijn (pmjdebruijn) wrote on 2005-12-29:

I forgot to add, that it naturally might be a bug in one of Evince's backend libraries, like libpoppler... I'm not sure...

Sebastien Bacher (seb128) on 2005-12-30

Changed in evince:
assignee:	nobody → gnome

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Sebastien Bacher (seb128) wrote on 2005-12-30:

Is your issue the same as described by https://bugs.freedesktop.org/show_bug.cgi?id=3098?

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Pascal de Bruijn (pmjdebruijn) wrote on 2005-12-30:

Thanks for the fast response...

But it seems that's my issue indeed!

So it's not a bug, but a missing feature...

Anyway I'd really like to see image transparancy implemented. I don't really care whether it gets included into Breezy, but it would be nice to see it in Dapper (for example).

Regards,
Pascal de Bruijn

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Sebastien Bacher (seb128) wrote on 2005-12-30:

Updating the settings according to that, we will try to work with upstream to get that feature implemented for dapper

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Pascal de Bruijn (pmjdebruijn) wrote on 2005-12-30:

It might be an interrim solution to use white (instead of black) as the color to use for 'transparant pixels', this way it won't be so obvious in plain documents...

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Daniel Holbach (dholbach) wrote on 2006-02-23:

Fixed in CVS.

Changed in poppler:
status:	Unconfirmed → Fix Committed

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Sebastien Bacher (seb128) wrote on 2006-02-26:

The CVS fix is for poppler cairo, the example of that bug works already fine with poppler splash and I switched the dapper package to splash today, that fixes the issue