Hi On Tue, Nov 20, 2012 at 11:26 PM, Marco Hugentobler <[email protected]> wrote: >> Not currently. By the way as far as I know the Arthur paint system in >> Qt4 is based on AGG. > > > Afaik it is not based on AGG. The QImage rasterizer is based on the freetype > scan-converter. > There is an article about it > (http://blog.qt.digia.com/blog/2009/12/18/qt-graphics-and-performance-the-raster-engine/). > The authors of Qt seem to have considered building it on top of AGG first, > then decided that it is not a good idea (template based approach of AGG, too > many conversions).
Ah interesting, thanks for the correction Marco! Regards Tim > > Regards, > Marco > > > On 20.11.2012 22:04, Tim Sutton wrote: >> >> Hi >> >> On Tue, Nov 20, 2012 at 4:30 PM, Олег Михалёв <[email protected]> >> wrote: >>> >>> Hi all, >>> >>> I have one global question about QGIS. >>> What is the situation with the development of Quantum GIS Engine? >>> I mean non-gui classes built on the top of Qt framework, which are >>> responsible for spatial data management and rendering. >> >> >> Ok so in our terminlogy that would be libqgis_core >> >> >>> Is there any active work on the significant improving of rendering >>> performance (http://hub.qgis.org/wiki/quantum-gis/Rendering_Performance) >>> or >>> redesign of QGIS Engine object model >> >> The next main task is for Martin to merge his threading branch which >> we hope will improve rendering performance somewhat. I also have some >> ideas about using a compositing so that we can boost performance at >> the possible expense of greater memory usage while rendering. >> >>> (http://hub.qgis.org/wiki/quantum-gis/Redesign_of_QGIS_data_model)? >>> Are there any plans for development of Qt-independent GIS core (with AGG >>> rendering engine, maybe)? >> >> Not currently. By the way as far as I know the Arthur paint system in >> Qt4 is based on AGG. >> >>> Looking through developer mailing lists of last years (2010-2012), I >>> haven't >>> found active discussion about the development of QGIS engine. >>> Is there another information about this topic? >> >> >> Not formally that I can think of. Rendering performance in my opinion >> should be the major focus of the 2.x release series - we have rich >> functionality now but we need to deliver that quickly to the display >> device or the user gets frustrated. >> >> Regards >> >> Tim >> >>> Oleg. >>> >>> _______________________________________________ >>> Qgis-developer mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/qgis-developer >>> >> >> >> -- >> Tim Sutton - QGIS Project Steering Committee Member (Release Manager) >> ============================================== >> Please do not email me off-list with technical >> support questions. Using the lists will gain >> more exposure for your issues and the knowledge >> surrounding your issue will be shared with all. >> >> Visit http://linfiniti.com to find out about: >> * QGIS programming and support services >> * Mapserver and PostGIS based hosting plans >> * FOSS Consulting Services >> Skype: timlinux >> Irc: timlinux on #qgis at freenode.net >> ============================================== >> _______________________________________________ >> Qgis-developer mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > -- > Dr. Marco Hugentobler > Sourcepole - Linux & Open Source Solutions > Weberstrasse 5, CH-8004 Zürich, Switzerland > [email protected] http://www.sourcepole.ch > Technical Advisor QGIS Project Steering Committee > > > _______________________________________________ > Qgis-developer mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-developer -- Tim Sutton - QGIS Project Steering Committee Member (Release Manager) ============================================== Please do not email me off-list with technical support questions. Using the lists will gain more exposure for your issues and the knowledge surrounding your issue will be shared with all. Visit http://linfiniti.com to find out about: * QGIS programming and support services * Mapserver and PostGIS based hosting plans * FOSS Consulting Services Skype: timlinux Irc: timlinux on #qgis at freenode.net ============================================== _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
