How do we scale DragUI?

[Gavin-Williams]

If I'm using a SoftwareBitmap, how do I scale it to the correct size when used for a DragUI? I can call...

args.DragUI.SetContentFromSoftwareBitmap(ImageMaster, offset);

But it's the wrong size, it's rendering with the master images actual size. In practice, the image must be scaled to some size. I don't see any way to scale the image at render time. There are suggestions to re-generate or recode the images, but that just seems insane to me when we can simply transform the texture. If we can't render to any size ... I have to keep a separate image for every size I want to render?

[castorix]

From my tests, I could not resize with async operations inside DragStarting
In this test, I used BitmapEncoder (BitmapTransform) to resize the butterfly, but as it is async (with await), I could only call it outside DragStarting :
(or maybe it can be done with GDI/GDI+ to resize synchronously the SoftwareBitmap inside DragStarting, not tested)

[Gavin-Williams]

Ok. It doesn't seem natural to me. But I suppose I'm just going to regenerate all the textures every time the control changes size. I'll make a note that there might be a way to resize using gdi.