1 files changed, 7 insertions, 2 deletions
diff --git a/src/gui/painting/qcolortransform.h b/src/gui/painting/qcolortransform.h
index 3df5be7c8b..14673fe924 100644
--- a/src/gui/painting/qcolortransform.h
+++ b/src/gui/painting/qcolortransform.h
@@ -31,16 +31,21 @@ public:
     QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_MOVE_AND_SWAP(QColorTransform)
 
     void swap(QColorTransform &other) noexcept { d.swap(other.d); }
+    Q_GUI_EXPORT bool isIdentity() const noexcept;
 
     Q_GUI_EXPORT QRgb map(QRgb argb) const;
     Q_GUI_EXPORT QRgba64 map(QRgba64 rgba64) const;
     Q_GUI_EXPORT QColor map(const QColor &color) const;
 
+    friend bool operator==(const QColorTransform &ct1, const QColorTransform &ct2)
+    { return ct1.compare(ct2); }
+    friend bool operator!=(const QColorTransform &ct1, const QColorTransform &ct2)
+    { return !ct1.compare(ct2); }
+
 private:
-    friend class QColorSpace;
     friend class QColorSpacePrivate;
     friend class QColorTransformPrivate;
-    friend class QImage;
+    Q_GUI_EXPORT bool compare(const QColorTransform &other) const;
 
     QExplicitlySharedDataPointer<QColorTransformPrivate> d;
 };