diff options
Diffstat (limited to 'src/corelib/animation/qvariantanimation_p.h')
-rw-r--r-- | src/corelib/animation/qvariantanimation_p.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/corelib/animation/qvariantanimation_p.h b/src/corelib/animation/qvariantanimation_p.h index 37318a5339..9f0f2e3030 100644 --- a/src/corelib/animation/qvariantanimation_p.h +++ b/src/corelib/animation/qvariantanimation_p.h @@ -58,6 +58,8 @@ #include "private/qabstractanimation_p.h" +#include <type_traits> + #ifndef QT_NO_ANIMATION QT_BEGIN_NAMESPACE @@ -104,7 +106,17 @@ public: }; //this should make the interpolation faster -template<typename T> inline T _q_interpolate(const T &f, const T &t, qreal progress) +template<typename T> +typename std::enable_if<std::is_unsigned<T>::value, T>::type +_q_interpolate(const T &f, const T &t, qreal progress) +{ + return T(f + t * progress - f * progress); +} + +// the below will apply also to all non-arithmetic types +template<typename T> +typename std::enable_if<!std::is_unsigned<T>::value, T>::type +_q_interpolate(const T &f, const T &t, qreal progress) { return T(f + (t - f) * progress); } |