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  1. Qt for Python
  2. PYSIDE-697

Add OpenGL fallback DLLs to Windows Python wheels

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    Details

    • Type: Task
    • Status: Closed
    • Priority: Not Evaluated
    • Resolution: Fixed
    • Affects Version/s: 5.11.0
    • Fix Version/s: 5.11.1
    • Component/s: PySide
    • Labels:
      None
    • Environment:

      Windows environment without OpenGL >= 2.0 capable display adapter.

      One example is that Windows 7 will have opengl 1.1 even after all Windows Updates are applied.

       

    • Technical Risk:
      Normal

      Description

      d3dcompiler_XX.dll and opengl32sw.dll are not included in the Windows Python wheels.

      Due to dynamic OpengGL leading[0] if OpenGL >=2.0 is not available Qt will try ANGLE[1].

      ANGLE requires three DLL files

      • libEGL.dll (included)
      • libGLESv2.dll (included)
      • d3dcompiler_XX.dll (not included)

      d3dcompiler_XX.dll is the DirectX shader compiler[2], "where XX is the version number that ANGLE (libGLESv2) was linked against." [1]

      If OpenGL >= 2.0 is not available and ANGLE is not available Qt will fallback to a software renderer.

      This requires opengl32sw.dll [1] which is not included in the wheel.

      0: https://blog.qt.io/blog/2014/11/27/qt-weekly-21-dynamic-opengl-implementation-loading-in-qt-5-4/

      1: http://doc.qt.io/qt-5/windows-deployment.html#creating-the-application-package

      2: https://github.com/Microsoft/DirectXShaderCompiler

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          Activity

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            Assignee:
            crmaurei Cristian Maureira-Fredes
            Reporter:
            code Cody Scott
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              Dates

              Created:
              Updated:
              Resolved:

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