Bug 25817

Summary:	[cairo] fails to respect layer transparency on complex pdf
Product:	poppler	Reporter:	Daniel Stone <daniel>
Component:	cairo backend	Assignee:	poppler-bugs <poppler-bugs>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	correctly-rendered jpg (exported from photoshop?) See how the circle is opaque and not transparent like in the original

Description Daniel Stone 2009-12-28 18:49:57 UTC

Using Poppler 0.10.7 on Fedora 11, the attached PDF fails to render correctly: it looks like many of the layers are squashed.  I've attached a JPG which I believe was exported from Photoshop or Illustrator, and the PDF itself.

It renders correctly using Preview on OS X, but a couple of elements (mainly the transparency on the date banner at the bottom and also on the 'issue 5' bit in the top right) seem to incorrectly have full opacity when using Evince, and also Gimp.

Comment 1 Daniel Stone 2009-12-28 18:52:02 UTC

Created attachment 32338 [details]
correctly-rendered jpg (exported from photoshop?)

Comment 2 Daniel Stone 2009-12-28 18:53:09 UTC

http://www.fooishbar.org/toomuch/20100122-silkie/toomuch-20100122-a6-front.pdf is a long-lived URL to the original PDF, as it's too large to attach here.

Comment 3 Albert Astals Cid 2009-12-29 00:33:35 UTC

Cairo renderer problem, works fine with the Splash renderer.

Comment 4 Carlos Garcia Campos 2009-12-29 01:38:12 UTC

It seems to work for me with cairo backend too, could you provide a screnshot showing the problem?

Comment 5 Albert Astals Cid 2009-12-29 10:17:27 UTC

Created attachment 32350 [details]
See how the circle is opaque and not transparent like in the original

Fails here on git master, cairo version is cairo-1.8.8-3.fc12.i686

Comment 6 Carlos Garcia Campos 2009-12-29 10:44:14 UTC

It probably use blend modes, which is implemented in git master but requires cairo >= 1.9.4, because it works perfectly for me. Feel free to reopen this bug if the problem is still present for you with cairo >= 1.9.4

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