internal/stroke: fix line overlap

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When the line overlaps itself backtracking exactly, e.g.

   path.MoveTo(0, 100)
   path.LineTo(100, 0)
   path.LineTo(0, 100)

then acos calculation is relatively unstable. By using atan2 it avoids
some of such problems in the calculation. Additionally, it simpliflies
the round join calculation.

Fixes: https://todo.sr.ht/~eliasnaur/gio/474
Signed-off-by: Egon Elbre <egonelbre@gmail.com>

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This commit is contained in:

Egon Elbre

2023-02-04 23:44:52 +02:00

committed by Elias Naur

parent 14a33f3cb7

commit bce4153640

4 changed files with 11 additions and 28 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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gpu/internal/rendertest/refs/TestPathReuse.png

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gpu/internal/rendertest/refs/TestStrokedPathCoincidentControlPoint.png

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gpu/internal/rendertest/refs/TestStrokedRect.png

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