[求助]怎样读出picture控件中的像素!
把数字图象从picture中读出来以后,怎样获得他的像素.
Option Explicit
Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hdc As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Declare Function BitBlt Lib "gdi32" (ByVal hDestDc As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, _
ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Declare Function SetPixelV Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal crColor As Long) As Long
Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long) As Long
Dim ImageR() As Integer
Dim ImageG() As Integer
Dim ImageB() As Integer
Dim x As Long, y As Long
Dim i As Long, j As Long, p As Long
Dim r As Long, g As Long, b As Long
Dim hBmp As Long, hDestDc As Long
Dim hdc As Long
hdc = Picture1.hdc
x = Picture1.ScaleWidth
y = Picture1.ScaleHeight
ReDim ImageR(y - 1, x - 1)
ReDim ImageG(y - 1, x - 1)
ReDim ImageB(y - 1, x - 1)
hBmp = CreateCompatibleBitmap(hdc, Picture1.ScaleWidth, Picture1.ScaleHeight)
hDestDc = CreateCompatibleDC(hdc)
SelectObject hDestDc, hBmp
For i = 0 To y - 1
For j = 0 To x - 1
p = GetPixel(hdc, j, i)
r = p And 255
g = (p And &HFF00FF00) / 256
b = ((p And &HFF0000) / 65536)
ImageR(i, j) = r
ImageG(i, j) = g
ImageB(i, j) = b
Next j
Next i
Call DeleteDC(hDestDc)
Call DeleteObject(hBmp)
