diff --git a/src/common/tvgMath.cpp b/src/common/tvgMath.cpp
index d22232ee..0254cce9 100644
--- a/src/common/tvgMath.cpp
+++ b/src/common/tvgMath.cpp
@@ -132,4 +132,12 @@ Point operator*(const Point& pt, const Matrix& m)
     auto tx = pt.x * m.e11 + pt.y * m.e12 + m.e13;
     auto ty = pt.x * m.e21 + pt.y * m.e22 + m.e23;
     return {tx, ty};
-}
\ No newline at end of file
+}
+
+uint8_t mathLerp(const uint8_t &start, const uint8_t &end, float t)
+{
+    auto result = static_cast<int>(start + (end - start) * t);
+    if (result > 255) result = 255;
+    else if (result < 0) result = 0;
+    return static_cast<uint8_t>(result);
+}
diff --git a/src/common/tvgMath.h b/src/common/tvgMath.h
index 556ed410..df39e3b9 100644
--- a/src/common/tvgMath.h
+++ b/src/common/tvgMath.h
@@ -259,5 +259,6 @@ static inline T mathLerp(const T &start, const T &end, float t)
     return static_cast<T>(start + (end - start) * t);
 }
 
+uint8_t mathLerp(const uint8_t &start, const uint8_t &end, float t);
 
 #endif //_TVG_MATH_H_