On Sun, Sep 25, 2016 at 10:33:00PM +0100, Gianluca wrote: > > > Il giorno 25 set 2016, alle ore 22:24, Артур Истомин <art.is...@yandex.ru> > > ha scritto: > > > > On Sun, Sep 25, 2016 at 09:54:59PM +0100, Gianluca wrote: > >> I use SVG format. > >> No matter what resolution and pixel density, they always look great > >> because they can be resized at any scale without any loss. > >> They are a bit slower than other formats, but with the power of the > >> average device user won’t notice it. > >> On the other hand you save a lot of space for your app. > > > > I'm thinking in the same direction. But there are several sizes: 18dp, > > 24dp, 36dp and 48dp. So what should I use to cover > > as many devices as possible? > > You don’t have to think about that. That’s the wonderful aspect of SVG. > Because they are a vectorial representation … they are essentially > mathematical curves and the image is generated directly at runtime on the > device. > In fact, SVG are dimensionless. It doesn’t exists an SVG of 600x600 pixel … > or 6x6 cm … or whatever because doesn’t make sense in the SVG format. > > You just need to use sourceSize property of Image to scale it properly to the > correct size of your device. > For example in my code, if I want to display an image of 2x2 cm, I calculate > at runtime a constant representing the number of pixel into 1 millimeter > (reading the physical screen information) and then I do the following: > > Image { > source: "my.svg" > width: 20*mm > height: 20*mm > sourceSize.width: 2*20*mm > sourceSize.height: 2*20*mm > smooth: true > } > > In that case Qt will generate (and cache) and image of 4x4 cm from the SVG > format and it will display at 2x2 cm size using Image. > In my experience, I found that you get better quality results if you set the > sourceSize to double of the size on which you need to display the image.
Thank You very much! > > > > > >> > >> Ciao, > >> Gianluca. > >> > >> > >>> Il giorno 25 set 2016, alle ore 21:21, Артур Истомин > >>> <art.is...@yandex.ru> ha scritto: > >>> > >>> I want to use images for icons from google's icons set. > >>> For example https://design.google.com/icons/#ic_search > >>> > >>> So I have options: 18dp, 24dp, 36dp, 48dp PNGs or SVGs. Moreover > >>> if I choose PNG format, there are 5 different images for different > >>> screens: hdpi, mdpi, xhdpi, xxhdpi, xxxhdpi. > >>> > >>> My software targets Android and Windows (desktop) devices with different > >>> screens and resolution and will have Material and Universal UI > >>> respectively. > >>> The app is writen with Qt Quick. > >>> > >>> What should I use? > >>> > >>> Thank you! > >>> _______________________________________________ > >>> Interest mailing list > >>> Interest@qt-project.org > >>> http://lists.qt-project.org/mailman/listinfo/interest > >> > >> > > _______________________________________________ > > Interest mailing list > > Interest@qt-project.org > > http://lists.qt-project.org/mailman/listinfo/interest > > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest