Large format export/printing (with transparencies and blending modes) crashes QGIS 2.4 on Windows 32bit

[qgib]

Author Name: Bernd Eversmann (@BarneyBev)
Original Redmine Issue: 11145
Affected QGIS version: master
Redmine category:map_composer/printing
Assignee: Jürgen Fischer

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I have a project I need to export as an DIN A0 map. The map contains shapeburst fills, transparencies and objects with blending modes.

This is what happens:

• When I try to export the map in DIN A0 (as .tiff, .jpg or .pdf), choosing print as raster, QGIS crashes, an empty file is created.
• When I export the same map in DIN A3 (raster resolution 300dpi), the file is written correctly.
• When I leave away all special effects (transparencies, blending modes) and do not tick 'print as raster', the file exports without problems in A0 size.
• When I try to export in A2, I get a "bad allocation" error message, and the map including all elements turns into a white page in print composer, until I restart QGIS. An empty file is written.

I am using QGIS 2.4 (osgeo4w installer) on Windows. The problems are the same using the Master (2.5) version.

I think this is quite a serious bug, because it makes it impossible to print cartographically demanding maps in large format.

Bernd

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Related issue(s): #19743 (relates)
Redmine related issue(s): 11473

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[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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Are you using a 64bit build? If not, I'd suggest you make the switch - 64 bit builds have much better support for large high resolution outputs.

[qgib]

Author Name: Bernd Eversmann (@BarneyBev)

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My machine at work is Windows 32bit. Is seems I have to switch. On my Mac (10.9, 64bit) the file export works just fine up to DIN A0, with all sorts of 'special effects' and big raster backgrounds.

That's good to know, but on 32bit machines this problem is still a serious limitation...

[qgib]

Author Name: Giovanni Manghi (@gioman)

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That's good to know, but on 32bit machines this problem is still a serious limitation...

this issue is known since long ago so i don't even know that we should keep this open (because evidently it has no easy solution) and instead document it.

If I'm not wrong 32bit qgis on Linux and OsX does not crash in the same situations, is just a Windows thing.

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• version was changed from 2.4.0 to master
• subject was changed from Large format export/printing (with transparencies and blending modes) crashes QGIS 2.4 to Large format export/printing (with transparencies and blending modes) crashes QGIS 2.4 on Windows 32bit

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• status_id was changed from Open to Feedback

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• assigned_to_id was configured as Jürgen Fischer

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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Qt in OSGeo4W 32bit was updated to 4.8.6 - please verify that it also solved the printing issue.

[qgib]

Author Name: Bernd Eversmann (@BarneyBev)

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Unfortunately I don't have access to a Win32 machine with QGIS at the moment. Can anyone else verify?

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Bernd Eversmann wrote:

Unfortunately I don't have access to a Win32 machine with QGIS at the moment. Can anyone else verify?

seems fine in my tests, please reopen if necessary.

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• resolution was changed from to worksforme
• status_id was changed from Feedback to Closed