created a simple script isolating the rendering phase reveal that the problem seems internal to the plugin
thank you Luigi Pirelli ([email protected] - [email protected]) ---- this script works ---- from PyQt4.QtCore import * from PyQt4.QtGui import * wms=QgsRasterLayer("crs=EPSG:3003&format=image/png&layers=rt_ofc.10k13&styles=&url=http://www502.regione.toscana.it/wmsraster/com.rt.wms.RTmap/wms?map%3Dwmsofc%26";, "nome", "wms") QgsMapLayerRegistry.instance().addMapLayers([wms]) # create image size = QSize(800,600) img = QPixmap(size) img.fill(QColor(255, 255, 255, 255)) mainCanvas = iface.mapCanvas() extent = mainCanvas.extent() mainRenderer = mainCanvas.mapRenderer() mapRenderer = QgsMapRenderer() mapRenderer.setOutputSize( size, img.logicalDpiX() ) mapRenderer.setDestinationCrs( mainRenderer.destinationCrs() ) mapRenderer.setMapUnits( mainRenderer.mapUnits() ) mapRenderer.setProjectionsEnabled( mainRenderer.hasCrsTransformEnabled() ) layerIds = [wms.id()] # set layer set mapRenderer.setLayerSet(layerIds) mapRenderer.setExtent(extent) extent.scale( float(1000) / mapRenderer.scale() ) render.setExtent(extent) # create painter p = QPainter() p.begin(img) # do the rendering mapRenderer.render(p) p.end() del p mapRenderer.deleteLater() del mapRenderer # save image img.save("/tmp/render.png","png") On 13 August 2014 19:22, Luigi Pirelli <[email protected]> wrote: > Hi > > I've a problem rendering WMS usign "simple rendering" as in: > http://docs.qgis.org/2.2/en/docs/pyqgis_developer_cookbook/composer.html#simple-rendering > > I noticed that WMS calls during rendering add an uncorrect dpi > resolution parameter set to 0 > and this value is set by this call: > https://github.com/qgis/QGIS/blob/master/src/core/raster/qgsrasterlayerrenderer.cpp#L158 > > commenting that line rendering is correct, but in this moment I don't > know If this call is wrong or I'm wrong forgetting to set something in > the renderContext. > > my code is here: > https://github.com/faunalia/rt_omero/blob/2.0/SchedaEdificio.py#L315 > > dpi value is set correctly here: > https://github.com/faunalia/rt_omero/blob/2.0/SchedaEdificio.py#L326 > > but its' value is overridden with 0 during rendering all the layers. > > Please help me to understand if it's a bug or my fault > > Thank you, Luigi Pirelli ([email protected] - [email protected]) > > NOTE: > render is ok using saveAsImage method in mapCanvas as in: > https://github.com/faunalia/rt_omero/blob/2.0/SchedaEdificio.py#L227 > > p.s I added Martin Dobias in cc because is the author of: > https://github.com/qgis/QGIS/blob/master/src/core/raster/qgsrasterlayerrenderer.cpp#L158 _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
