explain why we only consider integers right now

src/declarativeimports/core/framesvgitem.cpp

@@ -271,6 +271,8 @@ void FrameSvgItem::componentComplete()
 
 void FrameSvgItem::updateDevicePixelRatio()
 {
+    //devicepixelratio is always set integer in the svg, so needs at least 192dpi to double up.
+    //(it needs to be integer to have lines contained inside a svg piece to keep being pixel aligned)
     m_frameSvg->setDevicePixelRatio(qMax((qreal)1.0, floor(m_units.devicePixelRatio())));
 }
 

src/declarativeimports/core/svgitem.cpp

@@ -187,6 +187,8 @@ qreal SvgItem::implicitHeight() const
 void SvgItem::updateDevicePixelRatio()
 {
     if (m_svg) {
+        //devicepixelratio is always set integer in the svg, so needs at least 192dpi to double up.
+        //(it needs to be integer to have lines contained inside a svg piece to keep being pixel aligned)
         m_svg.data()->setDevicePixelRatio(qMax((qreal)1.0, floor(m_units.devicePixelRatio())));
     }
 }

src/plasma/svg.cpp

@@ -663,6 +663,8 @@ Svg::~Svg()
 void Svg::setDevicePixelRatio(qreal ratio)
 {
     //be completely integer for now
+    //devicepixelratio is always set integer in the svg, so needs at least 192dpi to double up.
+    //(it needs to be integer to have lines contained inside a svg piece to keep being pixel aligned)
     if (floor(d->devicePixelRatio) == floor(ratio)) {
         return;
     }