> -----Original Message----- > From: Interest [mailto:interest-bounces+kai.koehne=qt...@qt-project.org] > On Behalf Of Yuchen Deng > Sent: Tuesday, March 21, 2017 7:14 AM > To: interest@qt-project.org > Subject: [Interest] How to make WARP as fallback after d3d11 fails > hi, everyone, I have a question about OpenGL support on Windows. How can > I do make WARP as fallback after d3d11 fails. for now it's depends mesa's > opengl32sw if angle's d3d11 fail.
Hi! The code that implements this logic is in qtbase\src\plugins\platforms\windows\qwindowsopengltester.cpp ook at QWindowsOpenGLTester::requestedRenderer() and QWindowsOpenGLTester::detectSupportedRenderers() https://code.woboq.org/qt5/qtbase/src/plugins/platforms/windows/qwindowsopengltester.cpp.html#_ZN20QWindowsOpenGLTester17requestedRendererEv > I know to change the environment variable `set QT_OPENGL=angle` and `set > QT_ANGLE_PLATFORM=warp` can do that always, but I wanna when d3d11 > fails then set WARP as fallback not depends any environment variable setup. QWindowsOpenGLTester::detectSupportedRenderers() defines the order in which the different OpenGL ES renderers on Windows are evaluated. It also shows that there is a blacklist feature that disables certain types. So, if you blacklist e.g. D3D9 Qt should directly fall back to D3d11Warp. https://code.woboq.org/qt5/qtbase/src/plugins/platforms/windows/qwindowsopengltester.cpp.html#_ZN20QWindowsOpenGLTester24detectSupportedRenderersERK14GpuDescriptionb Hope this helps, Kai _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
