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| author | Kitsune Ral <Kitsune-Ral@users.sf.net> | 2019-06-25 21:19:50 +0900 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-06-25 21:19:50 +0900 |
| commit | d3ddd394e855cfe217bf0f0d368822c9b99316bb (patch) | |
| tree | 93c89f3e83291edfe88922182d4e5608a5ec62e7 /lib/util.cpp | |
| parent | 93f0c8fe89f448d1d58caa757573f17102369471 (diff) | |
| parent | 48ffee5fa78f44bd00d76772ad79ae4eeb6c8dc4 (diff) | |
| download | libquotient-d3ddd394e855cfe217bf0f0d368822c9b99316bb.tar.gz libquotient-d3ddd394e855cfe217bf0f0d368822c9b99316bb.zip | |
Merge pull request #322 from a-andreyev/aa13q-fancy-colors
Move out the logic of the hue calculation to utils
Diffstat (limited to 'lib/util.cpp')
| -rw-r--r-- | lib/util.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/util.cpp b/lib/util.cpp index 4e17d2f9..01d4e77b 100644 --- a/lib/util.cpp +++ b/lib/util.cpp @@ -23,6 +23,10 @@ #include <QtCore/QDir> #include <QtCore/QStringBuilder> +#include <QtCore/QCryptographicHash> +#include <QtCore/QtEndian> +#include <QtCore/QDataStream> + static const auto RegExpOptions = QRegularExpression::CaseInsensitiveOption | QRegularExpression::OptimizeOnFirstUsageOption @@ -93,6 +97,21 @@ QString QMatrixClient::cacheLocation(const QString& dirName) return cachePath; } +qreal QMatrixClient::stringToHueF(const QString &string) +{ + Q_ASSERT(!string.isEmpty()); + QByteArray hash = QCryptographicHash::hash(string.toUtf8(), + QCryptographicHash::Sha1); + QDataStream dataStream(qToLittleEndian(hash).left(2)); + dataStream.setByteOrder(QDataStream::LittleEndian); + quint16 hashValue; + dataStream >> hashValue; + const auto hueF = + qreal(hashValue)/std::numeric_limits<quint16>::max(); + Q_ASSERT((0 <= hueF) && (hueF <= 1)); + return hueF; +} + // Tests for function_traits<> #ifdef Q_CC_CLANG |