How small can you slice a HTML5 Canvas pixel?

[marcusbooster]

In Flash, pixels are calculated using twips, or twentieth of a pixel. Consequently, every position is always in multiples of 0.05. I haven't seen this mentioned in the HTML Canvas spec and am unable to trace the cursor position on Canvas. Does anyone know the accuracy of its pixel calculations?

[zcorpan]

There's no limit. Or the limit is UA-defined. Browsers can have a high-res backing store for canvas.

[marcusbooster]

Sorry, I'll try to clarify what I mean.
I'm referring more to Zeno's paradox which says in order to move something from point A to point B, it must first move to a point halfway between the two. And then halfway again, ad infinitum.

So if I want to move on the x axis from point 0 to 100 at 0.5:
At frame 1: 50
Frame 2: 75
Frame 3: 87.5
Then: 93.75, 96.875, 98.4375... etc.
So at what step does the Canvas actually round-up to the next pixel?

[zcorpan]

It's UA-defined.