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  1. Qt
  2. QTBUG-15660

QPainter draw wrong bezier curve when Antialiasing is enabled

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P1: Critical P1: Critical
    • 4.7.2
    • 4.7.1
    • GUI: Painting
    • None
    • windows 7 x64
      visual studio 2010
    • eb2bd43078c1bb43481aab795f92e105fa130860, 07b3a1c3d38d5870009e76de6315a9025e8f7915

      QPainter (raster engine) will draw a staight line instead of a bezier curve in some circumstances when Antialiasing is enabled. If I turn off Antialiasing QPainter will draw the bezier curve correctly. The attached program will show this.
      this bug affect Qt 4.7.1 and the code I grab from git repository today also has this bug.

        1. TestBezier.rar
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            rodal Samuel Rødal
            jianliang79 liang jian
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