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Enable WIDGETS_RHI when HIGHDPI_DOWNSCALE is set

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QT_WIDGETS_HIGHDPI_DOWNSCALE requires the rhi backing
store backend for GPU downscaling. Enable that automatically
to make the downscale functionality easier to use.

Change-Id: I27a538fef426768fe69fcfe07104136209b3bae2
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
(cherry picked from commit 672310c74691c60b303520c69287d73d07ab32a1)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Morten Sørvig 2024-08-06 10:44:14 +02:00 committed by Qt Cherry-pick Bot
parent db58564f4f
commit 0285424930
1 changed files with 4 additions and 1 deletions
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5
src/gui/painting/qbackingstorerhisupport.cpp
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@ -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