Greetings Qt community,
I'm currently working on a feasability using embedded hardware (Xilinx
Zynq).
It has no dedicated GPU so I'm experimenting with:
- Qt 4.8.7 (QtQuick 1.0)
- Qt 5.8 with OpenGL (QtQuick 2.0).
- Qt 5.8 with QtQuick 2D (QtQuick 2.0).
I'm building a multitouch interface with extensive use of scaling (for
transitions inside Row(s) or ListView(s)).
To make it clean I'm using a custom QML component that renders SVG with
the QPainter (based on QQuickPaintedItem for Qt 5).
This is what I get with a 3.0 scale:
https://image.ibb.co/ctYRkk/scale.png.
- Qt 4 does a good job at scaling SVG(s) or anything QPainter based.
- I suspect that Qt 5 just caches a static texture for a given
QQuickPaintedItem and simply scales it.
This gives a blurry output on both Qt 5 OpenGL and Software (QtQuick
2D).
Is there a way to force Qt 5 and QQuickPaintedItem to scale without
using its blurry texture cache ?
Note: I'm a little bit surprised about the transition to QtQuick 2.0.
The performance are there but they come with a significant graphical
tradeof. Having a scenegraph, shaders and particles is cool but it
shouldn't come at the expense of basic 2d rendering.
Let me know If I'm missing something,
Thanks !
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