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List:       qgis-developer
Subject:    Re: [QGIS-Developer] [Qgis-psc] Current state of QGIS and Qt 6 (good news!)
From:       Nyall Dawson via QGIS-Developer <qgis-developer () lists ! osgeo ! org>
Date:       2022-08-21 22:23:39
Message-ID: CAB28AsiEZghEfw_OEC_GpVedp64Veb+kaqeZNZ2fRKuLZMCOBQ () mail ! gmail ! com
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On Fri, 19 Aug 2022 at 18:10, Martin Dobias <wonder.sk@gmail.com> wrote:
> 
> Hi Nyall
> 
> On Fri, Aug 19, 2022 at 2:26 AM Nyall Dawson <nyall.dawson@gmail.com> wrote:
> > 
> > 
> > For reference: when I open a 3D view the debug messages just spam out
> > thousands of "Unhandled texture format:
> > Qt3DRender::QAbstractTexture::RGB8_UNorm" Qt warnings.
> 
> 
> That looks like Qt3D is trying to use the new RHI renderer. Can you try to switch \
> to the original OpenGL renderer by setting env variable QT3D_RENDERER=opengl ? It \
> seems like the RHI renderer only supports some texture types [1]. We should \
> actually enforce opengl renderer in the code (it seems RHI is the default now in \
> qt6 [2]). The RHI renderer also does not support geometry shaders for now (which we \
> use for line drawing). Fortunately it looks like the opengl renderer is not going \
> disappear, at least from what I understand (although at some point in future it may \
> be useful to migrate to RHI).

Thanks Martin! I can confirm that this fixes the issue. PR at
https://github.com/qgis/QGIS/pull/49887

Nyall

> 
> Cheers
> Martin
> 
> [1] https://github.com/qt/qt3d/blob/2f1bc82b35209aacd8d214a3c7e8e725bee85de6/src/plugins/renderers/rhi/textures/texture.cpp#L42
>  [2] https://doc-snapshots.qt.io/qt6-dev/qt3drender-porting-to-rhi.html
> 
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