=> R0 = pointer to path block
R1 = pointer to output path block, or 0 to calcluate size
R2 = flatness, or 0 for default
<= R0 = R1 = 0 calulated output buffer size
else pointer to end of path marker in output path
This SWI is a subset of Draw_StrokePath, as it will only flatten a path. This is useful if you want to repeatedly stroke a path, without having to repeately spend time flattening it.
See PRM 3, page 544.
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