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sw_engine: Fix one pixel blank #1342

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sw_engine: Fix one pixel blank #1342

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Commits on Jun 30, 2023

  1. sw_engine: Fix one pixel blank 

    If two sub path sharing one edge but with different direction.
The winding number of this edge is not zero, but the alpha for aa may be
zero. Since this edge is inside whole polygon, need to mark this edge in sweep
line based on this edge's cover.
    @RuiwenTang
    RuiwenTang committed Jun 30, 2023
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  2. append sweep line algorithm to extract shape outline

    @RuiwenTang
    RuiwenTang committed Jun 30, 2023
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    856c519 View commit details
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