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Revert "Apply ScaleFactorRoundingPolicy to QT_SCREEN_SCALE_FACTORS"

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Unblock the qtdeclarative dependency update.

This behavior change is causing a regression for QQmlPreviewHandler's
zoom feature. Back out of the change for now, until we can find a way
to make both use cases work.

This reverts commit 1c0a56a2f3.

Change-Id: I1b3d84504bbcb4f2b2250a20194fdaf4ab4fd97f
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
This commit is contained in:
Morten Sørvig 2022-07-07 11:07:41 +02:00
parent cb51ab41e8
commit 4cc84dc31c
2 changed files with 2 additions and 17 deletions
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4
src/gui/kernel/qhighdpiscaling.cpp
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@ -540,10 +540,8 @@ static const char scaleFactorProperty[] = "_q_scaleFactor";
/*
Sets a per-screen scale factor.
*/
void QHighDpiScaling::setScreenFactor(QScreen *screen, qreal rawFactor)
void QHighDpiScaling::setScreenFactor(QScreen *screen, qreal factor)
{
qreal factor = roundScaleFactor(rawFactor);
if (!qFuzzyCompare(factor, qreal(1))) {
m_screenFactorSet = true;
m_active = true;

15
tests/auto/gui/kernel/qhighdpi/tst_qhighdpi.cpp
View File

@ -313,10 +313,9 @@ void tst_QHighDpi::environment_QT_SCREEN_SCALE_FACTORS()
QFETCH(QByteArray, environment);
QFETCH(QList<qreal>, expectedDprValues);
qputenv("QT_SCREEN_SCALE_FACTORS", environment);
// Verify that setting QT_SCREEN_SCALE_FACTORS overrides the from-platform-screen-DPI DPR.
{
qputenv("QT_SCREEN_SCALE_FACTORS", environment);
std::unique_ptr<QGuiApplication> app(createStandardOffscreenApp(platformScreenDpi));
int i = 0;
for (QScreen *screen : app->screens()) {
@ -328,18 +327,6 @@ void tst_QHighDpi::environment_QT_SCREEN_SCALE_FACTORS()
QCOMPARE(window.devicePixelRatio(), expextedDpr);
}
}
// Verify that setHighDpiScaleFactorRoundingPolicy applies to QT_SCREEN_SCALE_FACTORS as well
QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::Round);
{
std::unique_ptr<QGuiApplication> app(createStandardOffscreenApp(platformScreenDpi));
int i = 0;
for (QScreen *screen : app->screens()) {
qreal expectedRounderDpr = qRound(expectedDprValues[i++]);
qreal windowDpr = QWindow(screen).devicePixelRatio();
QCOMPARE(windowDpr, expectedRounderDpr);
}
}
}
void tst_QHighDpi::environment_QT_USE_PHYSICAL_DPI()