form1 Private Sub Command_Click() With Picture1 .AutoRedraw = True .ScaleMode = 3 .BorderStyle = 0 DibGet .hdc,.ScaleWidth,.ScaleHeight End With With Picture2 .AutoRedraw = True .ScaleMode = 3 .BorderStyle = 0 .Width = Picture1.Width .Height = Picture1.Height End With CopyData InPutHei,InPutWid Picture2.AutoRedraw = True DIBPut Picture2.hdc Picture2.Refresh End Sub module1 Option Explicit '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 '获得指定类型的当前选定对象 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 Public 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 Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDest As Any,pSrc As Any,ByVal ByteLen As Long) Private Declare Function SetPixel Lib "gdi32" (ByVal hdc As Long,ByVal crColor As Long) As Long 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 '文件信息头——BITMAPINFOHEADER Private Type BitMapInfoHeader biSize As Long '位图大小 biWidth As Long '宽度 biHeight As Long '长度 biPlanes As Integer ' biBitCount As Integer '信息头长度 biCompression As Long '压缩方式 biSizeImage As Long biXPelsPerMeter As Long biYPelsPerMeter As Long biClrUsed As Long biClrImportant As Long End Type '颜色表 Private Type RGBQuad rgbBlue As Byte rgbGreen As Byte rgbRed As Byte 'rgbReserved As Byte End Type '位图信息头 Private Type BitMapInfo bmiHeader As BitMapInfoHeader bmiColors As RGBQuad End Type 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 Public InPutHei As Long '用于记录输入图像的高度 Public InPutWid As Long '用于记录输入图像的宽度 Dim bi24BitInfo As BitMapInfo '定义BMP信息 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 '获取系统时间 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),bi24BitInfo,0& DeleteObject iBitmap Done = True TimeGet = timeGetTime - TimeGet Exit Sub ErrLine: MsgBox "错误号:" & Err.Number & ":" & Err.Description End Sub Public Sub DIBPut(ByVal IdDestination As Long) Dim w As Long Dim H As Long Dim LineBytes As Long On Error GoTo ErrLine Done = False TimePut = timeGetTime w = InPutWid + 1 H = InPutHei + 1 With bi24BitInfo.bmiHeader .biWidth = w .biHeight = H LineBytes = ((w * Bits + 31) And &HFFFFFFE0) 8 .biSizeImage = LineBytes * H End With 'SetDIBitsToDevice IdDestination,W,ColOut(0,bi24BitInfo.bmiHeader,0 SetDIBitsToDevice IdDestination,w,0 Done = True TimePut = timeGetTime - TimePut Exit Sub ErrLine: MsgBox Err.Description End Sub 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,H) CopyMemory ColOut(0,Length End Sub
摘自一个技术馆 (编辑:李大同)
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