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  1. Qt
  2. QTBUG-63272

DRM dumb buffer platform support slow on unaccelerated hardware

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.9.1
    • Fix Version/s: 5.11.0
    • Component/s: QPA: LinuxFB
    • Labels:
      None
    • Environment:
      SAMA5D4 Xplained hardware with zero hardware acceleration, but a DRM/KMS driver.
    • Commits:
      f93003e0c6886402d17c3aeff2145c62a871ff05

      Description

      The DRM/KMS "dumb buffer" platform support (see QTBUG-56306) is currently hard coded to QImage::Format_ARGB32.  This is a significant performance hit on unaccelerated hardware for basic usage of the dumb buffer backend. This makes using the dumb buffer support very slow compared to fbdev due to differences in pixel format with all other things equal.

       

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            Assignee:
            lagocs Laszlo Agocs
            Reporter:
            joshua.henderson Joshua Henderson
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              Dates

              Created:
              Updated:
              Resolved:

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