好吧,我有4個值(A,R,G,B),並試圖將它們變成小數。當移位時爲負數
public function MergeABGR(A, R, G, B)
Return (A << 24) + (R << 16) + (G << 8) + B
end function
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
msgbox(MergeABGR(dim a = 255, dim r = 255, dim g = 0, dim b = 255))
End Sub
從這裏得到的結果是:-65282。
我應該得到:4294902015
任何人都知道爲什麼會這樣?
Dim Decimal as Long = 4294902015
Dim outA as integer = SplitA(Decimal, OutA)
Dim outR as integer = SplitR(Decimal, OutR)
Dim outG as integer = SplitG(Decimal, OutG)
Dim outB as integer = SplitB(Decimal, OutB)
Public Function SplitR(ABGR, ByRef R)
R = ABGR And &HFF
Return R
End Function
Public Function SplitG(ABGR, ByRef G)
G = ABGR >> 8 And &HFF
Return G
End Function
Public Function SplitB(ABGR, ByRef B)
B = ABGR >> 16 And &HFF
Return B
End Function
Public Function SplitA(ABGR, ByRef A)
A = ABGR >> 24 And &HFF
Return A
End Function
這一切後,這是結果我得到 歐塔= 255 OUTR = 255 OUTG = 0 OUTB = 255
如果您使用的是顏色,則可以直接提取ARGB值。 – dbasnett
將'Option Strict On'放在代碼的頂部。你的函數不指定任何返回類型。 –