[Interest] How to render small Images decently on non retina displays with QtQuick?

Shawn Rutledge Shawn.Rutledge at qt.io
Thu Mar 15 15:17:00 CET 2018

> On 8 Mar 2018, at 07:18, Uwe Rathmann <Uwe.Rathmann at tigertal.de> wrote:
> On Wed, 07 Mar 2018 20:55:03 +0100, Jason H wrote:
>> How is QPicture not appropriate for SVG?
> At the time, when Qt changed its APIs from integers to doubles ( Qt 4 ) 
> QPicture::boundingRect() was forgotten, what makes layouting of scaled 
> pictures too inaccurate.
> Another important detail are non cosmetic pens. You need to know about 
> them as they might grow outside the bounding rectangle.
> Beyond that QPicture stores painter commands in a platform-independent 
> format, what makes it less performant and the file sizes are larger.
> In the end ( not yet implemented ) I want to mmap my precompiled SVGs 
> into memory. Then, copying all precompiled SVGs at boot time into a RAM 
> drive and you have almost zero overhead for IO. 

That sounds interesting.  What format do you want to precompile them to?

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