QImage QgsMapRendererJob::composeImage( const QgsMapSettings& settings, const LayerRenderJobs& jobs ) { QImage image( settings.outputSize(), settings.outputImageFormat() ); image.fill( settings.backgroundColor().rgb() ); QPainter painter( &image ); for ( LayerRenderJobs::const_iterator it = jobs.constBegin(); it != jobs.constEnd(); ++it ) { const LayerRenderJob& job = *it; painter.setCompositionMode( job.blendMode ); Q_ASSERT( job.img != 0 ); painter.drawImage( 0, 0, *job.img ); } painter.end(); return image; }