1berry/qtbase
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

QtGui: Refactor parsing of the High DPI scaling env variables

Browse Source 
Use qEnvironmentVariable() where applicable and refactor the
parsing of QT_SCREEN_SCALE_FACTORS to use QStringRef.

Task-number: QTBUG-53022
Change-Id: I8956c6cecd7b634679eb5e66d2a87cccaf9e7936
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This commit is contained in:
Friedemann Kleint 2019-09-03 13:43:58 +02:00
parent dfeb2e16e0
commit 18088d4706
1 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/gui/kernel/qhighdpiscaling.cpp
View File

@ -86,7 +86,7 @@ static inline qreal initialGlobalScaleFactor()
qreal result = 1;
if (qEnvironmentVariableIsSet(scaleFactorEnvVar)) {
bool ok;
const qreal f = qgetenv(scaleFactorEnvVar).toDouble(&ok);
const qreal f = qEnvironmentVariable(scaleFactorEnvVar).toDouble(&ok);
if (ok && f > 0) {
qCDebug(lcScaling) << "Apply " << scaleFactorEnvVar << f;
result = f;
@ -284,7 +284,8 @@ static inline bool usePixelDensity()
return QCoreApplication::testAttribute(Qt::AA_EnableHighDpiScaling)
|| (screenEnvValueOk && screenEnvValue > 0)
|| (enableEnvValueOk && enableEnvValue > 0)
|| (qEnvironmentVariableIsSet(legacyDevicePixelEnvVar) && qgetenv(legacyDevicePixelEnvVar).toLower() == "auto");
|| (qEnvironmentVariableIsSet(legacyDevicePixelEnvVar)
&& qEnvironmentVariable(legacyDevicePixelEnvVar).compare(QLatin1String("auto"), Qt::CaseInsensitive) == 0);
}
qreal QHighDpiScaling::rawScaleFactor(const QPlatformScreen *screen)
@ -506,20 +507,20 @@ void QHighDpiScaling::updateHighDpiScaling()
}
if (qEnvironmentVariableIsSet(screenFactorsEnvVar)) {
int i = 0;
const auto specs = qgetenv(screenFactorsEnvVar).split(';');
for (const QByteArray &spec : specs) {
int equalsPos = spec.lastIndexOf('=');
const QString spec = qEnvironmentVariable(screenFactorsEnvVar);
const auto specs = spec.splitRef(QLatin1Char(';'));
for (const QStringRef &spec : specs) {
int equalsPos = spec.lastIndexOf(QLatin1Char('='));
qreal factor = 0;
if (equalsPos > 0) {
// support "name=factor"
QByteArray name = spec.mid(0, equalsPos);
QByteArray f = spec.mid(equalsPos + 1);
bool ok;
factor = f.toDouble(&ok);
const auto name = spec.left(equalsPos);
factor = spec.mid(equalsPos + 1).toDouble(&ok);
if (ok && factor > 0 ) {
const auto screens = QGuiApplication::screens();
for (QScreen *s : screens) {
if (s->name() == QString::fromLocal8Bit(name)) {
if (s->name() == name) {
setScreenFactor(s, factor);
break;
}