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发表于 2009-09-17 10:20
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'获取像素 DibGet() '图像输出 DIBPut() 'Copy 数组 CopyData() '用于存放从DIB输入的像素值(获取的像素数组) ColVal() '注 第一维: 0= B 值 1= G 值 2= R 值 3= Alpha ' 第二维: X 值 ' 第三维: Y 值 - '删除一个DC
- Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
- '删除一个对象
- Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
- '选择当前对象
- Private Declare Function GetCurrentObject Lib "gdi32" (ByVal hdc As Long, ByVal uObjectType As Long) As Long
- '获取DIB
- Private Declare Function GetDIBits Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BitMapInfo, ByVal wUsage As Long) As Long
- '获取系统时间
- Private Declare Function timeGetTime Lib "winmm.dll" () As Long
- '输出图像
- Private Declare Function SetDIBitsToDevice Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal dx As Long, ByVal dy As Long, ByVal SrcX As Long, ByVal SrcY As Long, ByVal Scan As Long, ByVal NumScans As Long, Bits As Any, BitsInfo As BitMapInfo, ByVal wUsage As Long) As Long
- '内存操作
- Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDest As Any, pSrc As Any, ByVal ByteLen As Long)
-
- '数据结构定义:
- Private Type BitMapInfoHeader '文件信息头——BITMAPINFOHEADER
- biSize As Long
- biWidth As Long
- biHeight As Long
- biPlanes As Integer
- biBitCount As Integer
- biCompression As Long
- biSizeImage As Long
- biXPelsPerMeter As Long
- biYPelsPerMeter As Long
- biClrUsed As Long
- biClrImportant As Long
- End Type
-
- Private Type RGBQuad
- rgbBlue As Byte
- rgbGreen As Byte
- rgbRed As Byte
- 'rgbReserved As Byte
- End Type
-
- Private Type BitMapInfo
- bmiHeader As BitMapInfoHeader
- bmiColors As RGBQuad
- End Type
-
- '过程中用到的全局变量:
- Private Const Bits As Long = 32 '颜色深度,这里把所有图像都按照32位来处理
- Public Done As Boolean '用于标记一个过程是否结束
- Public TimeGet As Long '用于记录输入过程处理所花费的时间
- Public TimePut As Long '用于记录输出过程处理所花费的时间
- Dim ColVal() As Byte '用于存放从DIB输入的像素值
- Dim ColOut() As Byte '用于存放向DIB输出的像素值
- Dim InPutHei As Long '用于记录输入图像的高度
- Dim InPutWid As Long '用于记录输入图像的宽度
- Dim bi24BitInfo As BitMapInfo '定义BMP信息
- '获取像素
- Public Sub DibGet(ByVal IdSource As Long, XBegin As Long, ByVal YBegin As Long, ByVal XEnd As Long, ByVal YEnd As Long)
- Dim iBitmap As Long
- Dim iDC As Long
- Dim I As Long
- Dim W As Long
- Dim H As Long
-
- On Error GoTo ErrLine
- Done = False
- TimeGet = timeGetTime
- InPutWid = XEnd - XBegin
- InPutHei = YEnd - YBegin
-
- W = InPutWid + 1
- H = InPutHei + 1
-
- I = (Bits \ 8) - 1
- ReDim ColVal(I, InPutWid, InPutHei)
- With bi24BitInfo.bmiHeader
- .biBitCount = Bits
- .biCompression = 0&
- .biPlanes = 1
- .biSize = Len(bi24BitInfo.bmiHeader)
- .biWidth = W
- .biHeight = H
- End With
-
- iBitmap = GetCurrentObject(IdSource, 7&)
- GetDIBits IdSource, iBitmap, 0&, H, ColVal(0, 0, 0), bi24BitInfo, 0&
- DeleteObject iBitmap
- Done = True
- TimeGet = timeGetTime - TimeGet
- Exit Sub
- ErrLine:
- MsgBox "错误号:" & Err.Number & ":" & Err.Description
- End Sub
- '图像输出
- Private Sub DIBPut(ByVal IdDestination As Long, Width As Long, Height As Long)
- Dim W As Long
- Dim H As Long
- Dim LineBytes As Long
- On Error GoTo ErrLine
- Done = False
- TimePut = timeGetTime
-
- W = Width + 1
- H = Height + 1
-
- With bi24BitInfo.bmiHeader
- .biWidth = W
- .biHeight = H
- LineBytes = ((W * Bits + 31) And &HFFFFFFE0) \ 8
- .biSizeImage = LineBytes * H
- End With
- SetDIBitsToDevice IdDestination, 0, 0, W, H, 0, 0, 0, H, ColOut(0, 0, 0), bi24BitInfo, 0
- Done = True
- TimePut = timeGetTime - TimePut
- Exit Sub
- On Error GoTo 0
- ErrLine:
- MsgBox Err.Description
- End Sub
- 'Copy 数组
- Public Sub CopyData(ByVal W As Long, ByVal H As Long)
- Dim Length As Long
- Dim I As Long
- Dim L As Long
-
- I = Bits \ 8
- L = I - 1
- Length = (W + 1&) * (H + 1&) * I
- ReDim ColOut(L, W, H)
- CopyMemory ColOut(0, 0, 0), ColVal(0, 0, 0), Length
- End Sub
复制代码'新建一窗体 添加 Picture1 , Picture2 ,Command1 '给 Picture1 Load 一图片 '按钮事件 - Private Sub Command1_Click()
- With Picture1
- .AutoRedraw = True
- .AutoSize = True
- .ScaleMode = 3
- .BorderStyle = 0
- DibGet .hdc, 0, 0, .ScaleWidth, .ScaleHeight
- End With
- CopyData InPutHei, InPutWid
-
- With Picture2
- .AutoRedraw = True
- .AutoSize = True
- .ScaleMode = 3
- .BorderStyle = 0
- DIBPut .hdc, InPutWid, InPutHei
- .Refresh
- End With
- End Sub
复制代码
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