Use GetData() get an array of the wrong length

[grjiq]

I have a 1000(rows)*1000(cols)3(dims) mat, the i use GetData() to get a []byte, but the len of []byte is 3000.

[grjiq]

func (mat *Mat) GetData() []byte { //return C.GoBytes(unsafe.Pointer(C.myGetData((*C.CvMat)(mat))), C.int(mat.step)) return C.GoBytes(unsafe.Pointer(C.myGetData((*C.CvMat)(mat))), C.int(mat.rows*mat.cols*3)) }
here C.int(mat.step) is 3000.