[Kmymoney-devel] KDE-srcbuild, KMyMoney and raster graphics on OSX

[Marko Käning]

Hi devs,

I am coming back to the list regarding KMM’s raster graphics issue on OSX
since Ian has gotten a little further regarding a possible workaround
(which I am forwarding as is from KDE-MAC for you herewith).

As he describes below, he had severe trouble disentangling what’s going
on during KMM’s startup and thus cannot find the cause of this behaviour.

But perhaps you guys are able to help him finding a way how to diagnose
what’s happening during KMM’s startup phase?!

Greets,
Marko



Begin forwarded message:

> From: Ian Wadham <iandw.au at gmail.com>
> Subject: [KDE/Mac] KDE-srcbuild, KMyMoney and raster graphics
> Date: 3 Jun 2014 12:33:47 GMT+2
> To: KDE Software on Mac OS X <kde-mac at kde.org>
> Reply-To: KDE Software on Mac OS X <kde-mac at kde.org>
> 
> Hi guys,
> 
> I now have working a system for building KDE 4.13 from source on
> Apple OS X, based on kedsrc-build, and can test it independently
> of MacPorts and my previous KDE installations.  It is still in a rather
> hackish form, so I need to tidy it up and document it. BTW, some days
> Baloo compiles and builds and some days it does not. It is still having
> features added, even in KDE 4.13. Either way, a lot of apps still build
> and run OK, with or without Baloo.
> 
> KMyMoney, as you know, crashes on Apple OS X if raster graphics
> is enabled. The problem turned out to be highly intractable.
> 
> KMM starts by showing a splash screen, then it creates 11 overlaid
> widgets, each of which seems to load data from the user's accounts
> file or database, using KIO to retrieve images and data. Then it displays
> a tip dialog.
> 
> I think it is the busiest startup sequence I have ever seen and KIO floods
> the log with messages, probably on multiple threads. So it is very difficult
> to see what is going on and where the KDE graphics may be failing. I think
> Qt is getting mixed up between when it should be using native graphics
> within a native main window and when it should (or should not) be
> switching to raster graphics.
> 
> I tried to simplify things by disabling the splash screen and the tip
> dialog (successfully) and then by disabling most of the 11 overlaid
> widgets (unsuccessfully). The latter made KMM crash even when
> raster graphics was off.
> 
> So what I am now proposing is a scheme for turning on raster graphics
> by default, but allowing specific applications, such as KMyMoney, to
> call a new static method, KApplication::doNotUseRasterGraphics(),
> before creating the KApplication, and so stay with native graphics.
> 
> In addition, there is a new environment variable called RasterOff. If
> this is defined, applications stay with native graphics. It can be used
> for before-and-after testing of apps. For example the following:
>    RasterOff=true open /Applications/.../kbounce.app
> will start KBounce in slow, black-on-black mode, whereas
>    open /Applications/.../kbounce.app
> will start KBounce in raster graphics mode at normal speed.
> 
> This environment variable could also be used, in an emergency, to
> work around a case where a second app is found not to be compatible
> with raster graphics. In time, the app could then be patched to use
> KApplication::doNotUseRasterGraphics().
> 
> Attached is a patch for kdelibs/kdeui/kernel/kapplication.* that
> implements all this, and another patch to fix KMyMoney so as
> not to use raster graphics.
> 
> Please let me know what you think.
> 
> All the best, Ian W.
> 
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> 
> 
> 
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