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  1. Qt
  2. QTBUG-16043

QGLWidget produces Artifacts using HighQualityAntialiasing or no Antialiasing

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 4.8.0
    • 4.7.1
    • GUI: OpenGL
    • None
    • Win7 Prof. 64bit Nvidia Geforce 8800GTS, Geforce 9650M GT, Geforce G105M, Geforce GTS 250 and ION
    • 67b24ac50637ecda00990b239fc5ed0b73e54d75

    Description

      Maybe this issue is related to QTBUG-12134. When trying the simple 2dpainting example, artifacts are appearing, on the edges of the circles. This is happening only in QGLWidget and only, when Antialiasing is set either to false, or to HighQualityAntialiasing (see attached Images).

      Unfortunately i had no ATI graphics adapters to test, if it could be a general nvidia-driver problem. (on every system are the newest nvidia-drivers installed)

      Attachments

        1. 2dpainting.zip
          25 kB
        2. highquality_aa.png
          highquality_aa.png
          51 kB
        3. no_aa.png
          no_aa.png
          38 kB
        4. normal_aa.png
          normal_aa.png
          81 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-26447 REG: QPainter renders horizontal lines incorrectly to QGLFramebufferObjects (ATI cards)

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              rodal Samuel Rødal
              aquilarapax Andreas Funke
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              Dates

                Created:
                Updated:
                Resolved:

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