In Qt 4.6 a new graphicssystem called trace was introduced. It allows to record all drawing operations into a trace buffer, store it to disk. Later it can be replayed with the qttracereplay utility of Qt. Gentoo currently does not have any ebuild for trace graphicssystem plugin and qttracereplay tool. Reproducible: Always Steps to Reproduce: 1. $ ./my-qt-app -graphicssystem trace 2. $ qttracereplay *.trace Actual Results: $ ./my-qt-app -graphicssystem trace Unable to load graphicssystem "trace" $ qttracereplay *.trace bash: qttracereplay: command not found Expected Results: Trace is successfully recorded and played back This trace/replay stuff is useful for doing profiling and performance optimizations.
we can adjust the qt-gui live ebuilds to see how that will go
Are you sure that trace exists on Qt 4.6? * from configure script * -graphicssystem <sys> Sets an alternate graphics system. Available options are: raster - Software rasterizer opengl - Rendering via OpenGL, Experimental! There is no trace engine available on 4.6
Created attachment 229799 [details] a hackish ebuild to provide trace graphicssystem (derived from qt-opengl)
Created attachment 229801 [details, diff] a hackish patch for qt-assistant to provide qttracereplay tool
(In reply to comment #2) > Are you sure that trace exists on Qt 4.6? Yes, it exists. I have just attached the ugly hacks that I'm using now. Of course I would prefer a clean out of the box solution, but I don't have a clear understanding about how all these qt ebuilds work.
Created attachment 229803 [details] updated qt-gui Ah it exists as a separate module and can't me used as default engine. I see. Please try the attached qt-gui ebuild with trace use flag enabled an let me know if it works for you.
(In reply to comment #6) > Please try the attached qt-gui ebuild with trace use flag enabled an let me > know if it works for you. Thanks, it works fine. Now in order to get a complete trace feature support, also qttracereplay tool needs to be bundled somewhere. BTW, this tool also allows to easily compare performance of different qt graphicssystems by playing back the traces (ex. "qttracereplay -graphicssystem raster sometrace.trace" vs. "qttracereplay sometrace.trace").
Thanks a lot. Both ebuilds are now on tree. Reopen this bug if you have any issues
Not sure what's going on, but qt-assistant can't be built now. emerge fails and log says: tar xzpf /var/tmp/portage/x11-libs/qt-assistant-4.6.2-r1/distdir/qt-everywhere-opensource-src-4.6.2.tar.gz qt-everywhere-opensour tar: qt-everywhere-opensource-src-4.6.2/tools/assistant: Not found in archive tar: qt-everywhere-opensource-src-4.6.2/tools/pixeltool: Not found in archive tar: qt-everywhere-opensource-src-4.6.2/tools/qdoc3: Not found in archive tar: Exiting with failure status due to previous errors
Sorry, first line got truncated. It's this command: tar xzpf /var/tmp/portage/x11-libs/qt-assistant-4.6.2-r1/distdir/qt-everywhere-opensource-src-4.6.2.tar.gz qt-everywhere-opensource-src-4.6.2/configure qt-everywhere-opensource-src-4.6.2/LICENSE.GPL3 qt-everywhere-opensource-src-4.6.2/LICENSE.LGPL qt-everywhere-opensource-src-4.6.2/projects.pro qt-everywhere-opensource-src-4.6.2/src/qbase.pri qt-everywhere-opensource-src-4.6.2/src/qt_targets.pri qt-everywhere-opensource-src-4.6.2/src/qt_install.pri qt-everywhere-opensource-src-4.6.2/bin qt-everywhere-opensource-src-4.6.2/config.tests qt-everywhere-opensource-src-4.6.2/mkspecs qt-everywhere-opensource-src-4.6.2/qmake qt-everywhere-opensource-src-4.6.2/tools/assistant qt-everywhere-opensource-src-4.6.2/tools/pixeltool qt-everywhere-opensource-src-4.6.2/tools/qdoc3 qt-everywhere-opensource-src-4.6.2/tools/assistant qt-everywhere-opensource-src-4.6.2/tools/pixeltool qt-everywhere-opensource-src-4.6.2/tools/qdoc3 qt-everywhere-opensource-src-4.6.2/tools/ qt-everywhere-opensource-src-4.6.2/demos/ qt-everywhere-opensource-src-4.6.2/examples/ qt-everywhere-opensource-src-4.6.2/src/ qt-everywhere-opensource-src-4.6.2/include/ qt-everywhere-opensource-src-4.6.2/doc/
http://bugs.gentoo.org/show_bug.cgi?id=318079
