SVG conversion to a large PNG takes a lot of time

[geniot]

Hi,
I'm trying to convert an SVG file to a large PNG.

But it takes a lot of time. So I'm trying to profile the CPU usage to provide a PR. Maybe you could give me a hint?

I found this comment:
// This draws the entire bounds of the image, because
// at this point the alpha mask does not shift with the
// placement of the target rectangle in the vector rasterizer

Indeed, why is it that to draw a single SvgPath we need to iterate over the pixels of the whole canvas?