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  1. Qt
  2. QTBUG-12116

Blending colors in combination with transparancy looks funny on 16bit framebuffer.

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Details

    • Bug
    • Resolution: Incomplete
    • P2: Important
    • None
    • 4.5.3, 4.6.2, 4.6.3, 4.7.0
    • (Inactive) GUI: QWS Integration (Qt4), GUI: Painting
    • None
    • Qt running on embedded device (powerpc) running embedded linux with 16bit (5-6-5) framebuffer.

    Description

      Colors of PNGs with alpha layer look funny. Same application displaying PNG without the alpha layer look OK. When the same application is run on a 32bit framebuffer, it looks ok. Also when run using qvfb (16bit) it looks ok.
      I've checked the endianness and it is selected ok (big endian).

      Attached you find 2 windows. Left is showing the RGB coded png. Right is showing the RGBA coded png.

      Attachments

        1. capture.png
          capture.png
          29 kB
        2. qdrawhelper_p.h.diff
          0.5 kB
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        Activity

          People

            Unassigned Unassigned
            fvannoote Frederik Vannoote
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            Dates

              Created:
              Updated:
              Resolved:

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