On 11/3/24 10:51 AM, Kees Zeelenberg wrote:
DirectX12 is not available on Windows 7 and 8; DirectX11 is the
latest. See
https://support.microsoft.com/en-us/topic/how-to-install-the-latest-version-of-directx-d1f5ffa5-dae2-246c-91b1-ee1e973ed8c2
The dependence on DirectX12 comes from Qt 6; see
https://doc.qt.io/qt-6/qtquick-visualcanvas-scenegraph-renderer.html#rendering-via-the-qt-rendering-hardware-interface.
This page also says that you may set the environment variable
QSG_RHI_BACKEND to one of the values vulkan, metal, opengl, d3d11,
d3d12. Since d3d11.dll is also a dependency of QtGui.dll, you might
try whether setting QSG_RHI_BACKEND to d3d11 works, although, since
d3d12.dll is a direct dependency of QtGui.dll, I suspect it won’t; if
not, you could try renaming a copy of d3d11.dll to d3d12.dll and add
it to the LyX/bin directory.
It sounds, therefore, as if one could compile LyX 2.4.2 with Qt 5, and
that would avoid this problem. Yes?
Riki
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