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  1. Qt
  2. QTBUG-64841

[REG 5.7.1->5.8.0] Wayland: Multi-planar surfaces (YUV video) are not decoded correctly

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.8.0, 5.10
    • Fix Version/s: 5.9.4, 5.10.1
    • Component/s: QPA: Wayland
    • Labels:
      None
    • Environment:
      AGL 4.0.4, Qt 5.8.0, Minnowboard (Intel Atom)
    • Commits:
      800c71ca816d76ac4de0616bf54b87f3c1f14c0a

      Description

      I'm trying to play hardware-accelerated video through wayland-egl and QtWayland-based compositor and video is displayed as monochrome with 'greenish' overlay (UV component is missing).

      QtWayland compositor is using fragment shader to convert multi-planar buffers (e.g. YUV video frames) to RGBA. This used to be working fine in 5.7.1, but got broken in 5.8.0 and seems to be present in 5.10 (not verified).

      I guess this was broken in this change: https://github.com/qt/qtwayland/commit/844204b2b04d0f3477d069db326f0e70129c71e2

       

      I don't have a test app for the issue as setup is quite specific to the project, but the patch is pretty obvious: in QWaylandQuickItem's meterial: QOpenGLTexture::bind() expects texture unit number as plain uint number (e.g. 0,1,2) and not as GLenum (GL_TEXTURE1).

      See proposed patch attached.

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            People

            Assignee:
            tvete Paul Olav Tvete
            Reporter:
            akozhanov Andrey Kozhanov
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              Dates

              Created:
              Updated:
              Resolved:

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