Re: [Qgis-developer] QGIS Engine development

2012-11-30 Thread Radim Blazek
On Tue, Nov 27, 2012 at 9:42 PM, Martin Dobias wrote: > I have been measuring the performance of vector layer rendering some time > ago and it varies greatly on three levels: > - data source type (shapefile / database layer / ...) > - layer type (geometry type, number of vertices per geometry, num

Re: [Qgis-developer] QGIS Engine development

2012-11-27 Thread Martin Dobias
Hi let me share some thoughts... On Wed, Nov 21, 2012 at 3:34 PM, Mihis wrote: > Marco Hugentobler-4 wrote > > I don't know if AGG would be faster than the Qt raster paint engine and > > how much. It would be very interesting to have the comparison AGG <-> Qt > > raster engine (and maybe libcai

Re: [Qgis-developer] QGIS Engine development

2012-11-21 Thread Mihis
Marco Hugentobler-4 wrote > I don't know if AGG would be faster than the Qt raster paint engine and > how much. It would be very interesting to have the comparison AGG <-> Qt > raster engine (and maybe libcairo as well). > > With AGG / cairo, the approach would be to create a new Qt paint engine

Re: [Qgis-developer] QGIS Engine development

2012-11-20 Thread Marco Hugentobler
Are there any plans for development of Qt-independent GIS core (with AGG rendering engine, maybe)? I don't know if AGG would be faster than the Qt raster paint engine and how much. It would be very interesting to have the comparison AGG <-> Qt raster engine (and maybe libcairo as well). With

Re: [Qgis-developer] QGIS Engine development

2012-11-20 Thread Tim Sutton
Hi On Tue, Nov 20, 2012 at 11:26 PM, Marco Hugentobler 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 > (htt

Re: [Qgis-developer] QGIS Engine development

2012-11-20 Thread Marco Hugentobler
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-

Re: [Qgis-developer] QGIS Engine development

2012-11-20 Thread Tim Sutton
Hi On Tue, Nov 20, 2012 at 4:30 PM, Олег Михалёв 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 rende

[Qgis-developer] QGIS Engine development

2012-11-20 Thread Олег Михалёв
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. Is there any active work on the significant improving of render