-typedef unsigned char PixelBuffer; ///< pixel data buffer @SINCE_1_0.0
-typedef Rect<unsigned int> RectArea; ///< rectangular area (x,y,w,h) @SINCE_1_0.0
+typedef uint8_t PixelBuffer; ///< pixel data buffer @SINCE_1_0.0
+typedef Rect<uint32_t> RectArea; ///< rectangular area (x,y,w,h) @SINCE_1_0.0