Please test raster engine on Qt packages

Hwoarang

Hello there,

Qt team is considering to enable raster graphics engine[1] by default on Qt packages ( that is qt-gui ). In order to proceed, we need you to enable this use flag, rebuild qt-gui, as well as testing as many Qt apps as you can. Please report possible bugs related to this graphics backend directly to this thread or gentoo bugzilla

Additionally, if you don't feel like recompiling the whole qt-gui module, you can simply test the raster engine by adding

Herring42 · Posted: Tue Feb 23, 2010 3:38 pm Post subject:

No problems (yet) with gwenview -graphicssystem raster

For reference, gwenview -graphicssystem opengl is fine for graphics, but the text is garbled.

I'll recompile qt-gui, and see how we go :-)

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tkmorris · n00b Joined: 22 Oct 2008 Posts: 4

Plasma-desktop isn't usable with OpenGL, but works with raster. KMess works better with OpenGL, still has issues with text, but raster is fine.

RealNC · Tux's lil' helper Joined: 13 Apr 2008 Posts: 147

Ant P. · Veteran Joined: 18 Apr 2009 Posts: 1291 Location: UK

I've had the raster useflag turned on for months with no problems.

Also I just tried opening qgit with opengl; it didn't crash but it's far too slow to be of any use.

Hwoarang

RealNC · Tux's lil' helper Joined: 13 Apr 2008 Posts: 147

I know what raster is. The question is simply whether it has the same benefits with recent Qt version as it had in the past. If not, there's no point in switching to it by default.

Edit:
I've rebuilt qt-gui with raster and restarted KDE. There doesn't seem to be any breakage. Everything looks and behaves the same as before.

rahulthewall · Veteran Joined: 01 Nov 2007 Posts: 1264 Location: Zürich

Recompiling qt-gui now. Oh, and the graphicssystem opengl does not work for any app for me. Raster seems to work fine. Let's see how this goes.
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RealNC · Tux's lil' helper Joined: 13 Apr 2008 Posts: 147

I found a problem with raster. Opening a big file in Qt Creator and scrolling up/down very fast results in X using 35-40% CPU and the qtcreator process uses 15%.

With "-graphicssystem native" X uses 15-20% CPU and qtcreator 6-9%.

Raster stresses the CPU twice as much as native. Doesn't look too good to me

Hwoarang · Posted: Tue Feb 23, 2010 9:25 pm Post subject:

which Qt version? 4.6.2?

RealNC · Tux's lil' helper Joined: 13 Apr 2008 Posts: 147

Yes, 4.6.2. I'm on AMD64.

rahulthewall · Veteran Joined: 01 Nov 2007 Posts: 1264 Location: Zürich

Can't notice any difference so far. (~x86 here)
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RealNC · Tux's lil' helper Joined: 13 Apr 2008 Posts: 147

Qt Designer is pretty much the only app where I can reproduce this though. Maybe a false alert. I panicked because Qt Creator was the first thing I tried to test with raster

Etal · Veteran Joined: 15 Jul 2005 Posts: 1580

With the raster engine, I can now visit the new kde.org with Konqueror without it lagging horribly

Recompiling qt-gui now

jensp · n00b Joined: 06 Dec 2009 Posts: 4

Have been running qt-gui with raster useflag for quite a while now, haven't noticed any bugs, but didn't feel any speedup either.

Link31 · Apprentice Joined: 17 Apr 2006 Posts: 200 Location: France

I'm currently running with the raster useflag enabled on Qt 4.6.0 and KDE 4.3.4 (w/ crappy fglrx drivers).

Most apps feel much faster (especially Okular and to a lesser extent Konqueror). They seem to use a lot of memory after having run for a long time, but I'm not really sure about how this compares to the "native" renderer.

However, I get some graphical corruptions with Konqueror : screenshot.

BTW, I've also tried the "opengl" renderer: it is very slow, the display is corrupted (with black rectangles or triangles that don't paint synchronously) and often crashes the whole application...

RealNC · Tux's lil' helper Joined: 13 Apr 2008 Posts: 147

The OpenGL renderer is known not to work, so you don't need to test that actually.

Etal · Veteran Joined: 15 Jul 2005 Posts: 1580

I get some minor problems with Konqueror, too. For me, the text sometimes gets blurred, and sometimes the links or images move by a pixel when hovered. Nothing serious, though.

krigstask · Posted: Thu Feb 25, 2010 10:49 am Post subject:

Everything seems to work properly here after qt-gui re-emerging. This includes:

www-client/arora
net-im/psi
kde-misc/krusader
dev-util/eric
dev-util/qtcreator
kde-base/okular
net-p2p/transmission

That's more or less extensively used apps, I'll keep eyes open.

krigstask · Posted: Thu Feb 25, 2010 9:01 pm Post subject:

All menus drawn by Qt in www-client/opera lacks icons. Should I report it to bugzilla?

opera -graphicssystem native works fine.

duryodhana · n00b Joined: 13 Jan 2008 Posts: 64

Here, with the raster useflag turned on, applications run much faster the difference is notable in Kgeography for example. Everything works properly.

Hwoarang · Posted: Fri Feb 26, 2010 4:04 am Post subject:

krigstask · Posted: Fri Feb 26, 2010 5:16 am Post subject:

Herring42 · Posted: Fri Feb 26, 2010 8:32 am Post subject:

OpenOffice 3.2.0 crashes on startup
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Hwoarang · Posted: Sat Feb 27, 2010 11:01 am Post subject:

Thank you both