diff --git a/src/gui/painting/qbackingstorerhisupport.cpp b/src/gui/painting/qbackingstorerhisupport.cpp index 37c52155eb4..1f90e743d5a 100644 --- a/src/gui/painting/qbackingstorerhisupport.cpp +++ b/src/gui/painting/qbackingstorerhisupport.cpp @@ -265,7 +265,10 @@ bool QBackingStoreRhiSupport::checkForceRhi(QPlatformBackingStoreRhiConfig *outC checked = true; const bool alwaysRhi = qEnvironmentVariableIntValue("QT_WIDGETS_RHI"); - if (alwaysRhi) + const bool highdpiDownscale = qEnvironmentVariableIntValue("QT_WIDGETS_HIGHDPI_DOWNSCALE"); + if (highdpiDownscale) + qCDebug(lcQpaBackingStore) << "Enabling QT_WIDGETS_RHI due to QT_WIDGETS_HIGHDPI_DOWNSCALE"; + if (alwaysRhi || highdpiDownscale) config.setEnabled(true); // if enabled, choose an api