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-rw-r--r--src/gui/painting/qtransform.cpp28
1 files changed, 27 insertions, 1 deletions
diff --git a/src/gui/painting/qtransform.cpp b/src/gui/painting/qtransform.cpp
index a3e9db2057..a23aabe559 100644
--- a/src/gui/painting/qtransform.cpp
+++ b/src/gui/painting/qtransform.cpp
@@ -34,6 +34,7 @@
#include "qdatastream.h"
#include "qdebug.h"
+#include "qhashfunctions.h"
#include "qmatrix.h"
#include "qregion.h"
#include "qpainterpath.h"
@@ -776,6 +777,29 @@ bool QTransform::operator==(const QTransform &o) const
}
/*!
+ \since 5.6
+ \relates QTransform
+
+ Returns the hash value for \a key, using
+ \a seed to seed the calculation.
+*/
+uint qHash(const QTransform &key, uint seed) Q_DECL_NOTHROW
+{
+ QtPrivate::QHashCombine hash;
+ seed = hash(key.m11(), seed);
+ seed = hash(key.m12(), seed);
+ seed = hash(key.m21(), seed);
+ seed = hash(key.m22(), seed);
+ seed = hash(key.dx(), seed);
+ seed = hash(key.dy(), seed);
+ seed = hash(key.m13(), seed);
+ seed = hash(key.m23(), seed);
+ seed = hash(key.m33(), seed);
+ return seed;
+}
+
+
+/*!
\fn bool QTransform::operator!=(const QTransform &matrix) const
Returns \c true if this matrix is not equal to the given \a matrix,
otherwise returns \c false.
@@ -1357,7 +1381,9 @@ static QPolygonF mapProjective(const QTransform &transform, const QPolygonF &pol
path = transform.map(path);
QPolygonF result;
- for (int i = 0; i < path.elementCount(); ++i)
+ const int elementCount = path.elementCount();
+ result.reserve(elementCount);
+ for (int i = 0; i < elementCount; ++i)
result << path.elementAt(i);
return result;
}