MacDue 95a07bd4e5 LibGfx: Add Path::stroke_to_fill(thickness) ...

This function generates a new path, which can be filled to rasterize
a stroke of the original path (at whatever thickness you like). It
does this by convolving a circular pen with the path, so right now
only supports round line caps.

Since filled paths now have good antialiasing, doing this results in
good stroked paths for "free". It also (for free) fixes stroked lines
with an opacity < 1, nice line joins, and is possible to fill with a
paint style (e.g. a gradient or an image).

Algorithm from: https://keithp.com/~keithp/talks/cairo2003.pdf

2023-06-06 09:17:06 +02:00

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