VERSION 1.0 Class BEGIN CLASSBEGIN MultiUse = -1 'TrueENDAttribute VB_Name = "cDIBSection"Attribute VB_GlobalNameSpace = FalseAttribute VB_Creatable = TrueAttribute VB_PredeclaredId = FalseAttribute VB_Exposed = FalseOption Explicit'Powered by barenxPrivate Declare Sub CopyMemory()Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" ( _ lpvDest As Any, lpvSource As Any, ByVal cbCopy As Long)Private Type SAFEARRAYBOUND cElements As Long lLbound As LongEnd TypePrivate Type SAFEARRAY2D cDims As Integer fFeatures As Integer cbElements As Long cLocks As Long pvData As Long Bounds(0 To 1) As SAFEARRAYBOUNDEnd TypePrivate Declare Function VarPtrArray()Function VarPtrArray Lib "msvbvm50.dll" Alias "VarPtr" (Ptr() As Any) As LongPrivate Type RGBQUAD rgbBlue As Byte rgbGreen As Byte rgbRed As Byte rgbReserved As ByteEnd TypePrivate Type BITMAPINFOHEADER '40 bytes 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 LongEnd TypePrivate Type BITMAPINFO bmiHeader As BITMAPINFOHEADER bmiColors As RGBQUADEnd TypePrivate Declare Function CreateCompatibleDC()Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As LongPrivate Declare Function GetDC()Function GetDC Lib "user32" (ByVal hwnd As Long) As LongPrivate Declare Function GetDesktopWindow()Function GetDesktopWindow Lib "user32" () As Long' Note - this is not the declare in the API viewer - modify lplpVoid to be' Byref so we get the pointer back:Private Declare Function CreateDIBSection()Function CreateDIBSection Lib "gdi32" _ (ByVal hdc As Long, _ pBitmapInfo As BITMAPINFO, _ ByVal un As Long, _ lplpVoid As Long, _ ByVal handle As Long, _ ByVal dw As Long) As LongPrivate Declare Function BitBlt()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 LongPrivate Declare Function SelectObject()Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As LongPrivate Declare Function DeleteObject()Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As LongPrivate Declare Function DeleteDC()Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As LongPrivate Declare Function LoadImage()Function LoadImage Lib "user32" Alias "LoadImageA" (ByVal hInst As Long, ByVal lpsz As String, ByVal un1 As Long, ByVal n1 As Long, ByVal n2 As Long, ByVal un2 As Long) As LongPrivate Const BI_RGB = 0&Private Const BI_RLE4 = 2&Private Const BI_RLE8 = 1&Private Const DIB_RGB_COLORS = 0 ' color table in RGBsPrivate Type BITMAP bmType As Long bmWidth As Long bmHeight As Long bmWidthBytes As Long bmPlanes As Integer bmBitsPixel As Integer bmBits As LongEnd TypePrivate Declare Function GetObjectAPI()Function GetObjectAPI Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As LongPrivate Declare Function timeGetTime()Function timeGetTime Lib "winmm.dll" () As LongPrivate Declare Function CreateCompatibleBitmap()Function CreateCompatibleBitmap Lib "gdi32" (ByVal hdc As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long' Clipboard functions:Private Declare Function OpenClipboard()Function OpenClipboard Lib "user32" (ByVal hwnd As Long) As LongPrivate Declare Function CloseClipboard()Function CloseClipboard Lib "user32" () As LongPrivate Declare Function SetClipboardData()Function SetClipboardData Lib "user32" (ByVal wFormat As Long, ByVal hMem As Long) As LongPrivate Declare Function EmptyClipboard()Function EmptyClipboard Lib "user32" () As LongPrivate Const CF_BITMAP = 2Private Const CF_DIB = 8' Handle to the current DIBSection:Private m_hDIb As Long' Handle to the old bitmap in the DC, for clear up:Private m_hBmpOld As Long' Handle to the Device context holding the DIBSection:Private m_hDC As Long' Address of memory pointing to the DIBSection's bits:Private m_lPtr As Long' Type containing the Bitmap information:Private m_tBI As BITMAPINFOPublic Function CopyToClipboard()Function CopyToClipboard( _ Optional ByVal bAsDIB As Boolean = True _ ) As BooleanDim lhDCDesktop As LongDim lHDC As LongDim lhBmpOld As LongDim hObj As LongDim lFmt As LongDim b() As ByteDim tBI As BITMAPINFODim lPtr As LongDim hDibCopy As Long lhDCDesktop = GetDC(GetDesktopWindow()) If (lhDCDesktop <> 0) Then lHDC = CreateCompatibleDC(lhDCDesktop) If (lHDC <> 0) Then If (bAsDIB) Then MsgBox "I don't know how to put a DIB on the clipboard! Copy as bitmap instead!!!" ' Create a duplicate DIBSection and copy ' to the clipboard: 'LSet tBI = m_tBI 'hDibCopy = CreateDIBSection( _ ' lhDC, _ ' m_tBI, _ ' DIB_RGB_COLORS, _ ' lPtr, _ ' 0, 0) 'If (hDibCopy <> 0) Then ' lhBmpOld = SelectObject(lhDC, hObj) ' BitBlt lhDC, 0, 0, Width, Height, m_hDC, 0, 0, vbSrcCopy ' SelectObject lhDC, lhBmpOld ' lFmt = CF_DIB ' ' '.... 'Else ' hObj = 0 'End If Else ' Create a compatible bitmap and copy to ' the clipboard: hObj = CreateCompatibleBitmap(lhDCDesktop, Width, Height) If (hObj <> 0) Then lhBmpOld = SelectObject(lHDC, hObj) PaintPicture lHDC SelectObject lHDC, lhBmpOld lFmt = CF_BITMAP ' Now set the clipboard to the bitmap: If (OpenClipboard(0) <> 0) Then EmptyClipboard If (SetClipboardData(lFmt, hObj) <> 0) Then CopyToClipboard = True End If CloseClipboard End If End If End If DeleteDC lHDC End If DeleteDC lhDCDesktop End IfEnd FunctionPublic Function CreateDIB()Function CreateDIB( _ ByVal lHDC As Long, _ ByVal lWidth As Long, _ ByVal lHeight As Long, _ ByRef hDib As Long _ ) As Boolean With m_tBI.bmiHeader .biSize = Len(m_tBI.bmiHeader) .biWidth = lWidth .biHeight = lHeight .biPlanes = 1 .biBitCount = 24 .biCompression = BI_RGB .biSizeImage = BytesPerScanLine * .biHeight End With hDib = CreateDIBSection( _ lHDC, _ m_tBI, _ DIB_RGB_COLORS, _ m_lPtr, _ 0, 0) CreateDIB = (hDib <> 0)End FunctionPublic Function CreateFromPicture()Function CreateFromPicture( _ ByRef picThis As StdPicture _ )Dim lHDC As LongDim lhDCDesktop As LongDim lhBmpOld As LongDim tBMP As BITMAP GetObjectAPI picThis.handle, Len(tBMP), tBMP If (Create(tBMP.bmWidth, tBMP.bmHeight)) Then lhDCDesktop = GetDC(GetDesktopWindow()) If (lhDCDesktop <> 0) Then lHDC = CreateCompatibleDC(lhDCDesktop) DeleteDC lhDCDesktop If (lHDC <> 0) Then lhBmpOld = SelectObject(lHDC, picThis.handle) LoadPictureBlt lHDC SelectObject lHDC, lhBmpOld DeleteObject lHDC End If End If End IfEnd FunctionPublic Function Create()Function Create( _ ByVal lWidth As Long, _ ByVal lHeight As Long _ ) As Boolean ClearUp m_hDC = CreateCompatibleDC(0) If (m_hDC <> 0) Then If (CreateDIB(m_hDC, lWidth, lHeight, m_hDIb)) Then m_hBmpOld = SelectObject(m_hDC, m_hDIb) Create = True Else DeleteObject m_hDC m_hDC = 0 End If End IfEnd FunctionPublic Property Get()Property Get BytesPerScanLine() As Long ' Scans must align on dword boundaries: BytesPerScanLine = (m_tBI.bmiHeader.biWidth * 3 + 3) And &HFFFFFFFCEnd PropertyPublic Property Get()Property Get Width() As Long Width = m_tBI.bmiHeader.biWidthEnd PropertyPublic Property Get()Property Get Height() As Long Height = m_tBI.bmiHeader.biHeightEnd PropertyPublic Sub LoadPictureBlt()Sub LoadPictureBlt( _ ByVal lHDC As Long, _ Optional ByVal lSrcLeft As Long = 0, _ Optional ByVal lSrcTop As Long = 0, _ Optional ByVal lSrcWidth As Long = -1, _ Optional ByVal lSrcHeight As Long = -1, _ Optional ByVal eRop As RasterOpConstants = vbSrcCopy _ ) If lSrcWidth < 0 Then lSrcWidth = m_tBI.bmiHeader.biWidth If lSrcHeight < 0 Then lSrcHeight = m_tBI.bmiHeader.biHeight BitBlt m_hDC, 0, 0, lSrcWidth, lSrcHeight, lHDC, lSrcLeft, lSrcTop, eRopEnd SubPublic Sub PaintPicture()Sub PaintPicture( _ ByVal lHDC As Long, _ Optional ByVal lDestLeft As Long = 0, _ Optional ByVal lDestTop As Long = 0, _ Optional ByVal lDestWidth As Long = -1, _ Optional ByVal lDestHeight As Long = -1, _ Optional ByVal lSrcLeft As Long = 0, _ Optional ByVal lSrcTop As Long = 0, _ Optional ByVal eRop As RasterOpConstants = vbSrcCopy _ ) If (lDestWidth < 0) Then lDestWidth = m_tBI.bmiHeader.biWidth If (lDestHeight < 0) Then lDestHeight = m_tBI.bmiHeader.biHeight BitBlt lHDC, lDestLeft, lDestTop, lDestWidth, lDestHeight, m_hDC, lSrcLeft, lSrcTop, eRopEnd SubPublic Property Get()Property Get hdc() As Long hdc = m_hDCEnd PropertyPublic Property Get()Property Get hDib() As Long hDib = m_hDIbEnd PropertyPublic Property Get()Property Get DIBSectionBitsPtr() As Long DIBSectionBitsPtr = m_lPtrEnd PropertyPublic Sub RandomiseBits()Sub RandomiseBits( _ Optional ByVal bGray As Boolean = False _ )Dim bDib() As ByteDim x As Long, y As LongDim lC As LongDim tSA As SAFEARRAY2DDim xEnd As Long ' Get the bits in the from DIB section: With tSA .cbElements = 1 .cDims = 2 .Bounds(0).lLbound = 0 .Bounds(0).cElements = m_tBI.bmiHeader.biHeight .Bounds(1).lLbound = 0 .Bounds(1).cElements = BytesPerScanLine() .pvData = m_lPtr End With CopyMemory ByVal VarPtrArray(bDib()), VarPtr(tSA), 4 ' random: Randomize Timer xEnd = (Width - 1) * 3 If (bGray) Then For y = 0 To m_tBI.bmiHeader.biHeight - 1 For x = 0 To xEnd Step 3 lC = Rnd * 255 bDib(x, y) = lC bDib(x + 1, y) = lC bDib(x + 2, y) = lC Next x Next y Else For x = 0 To xEnd Step 3 For y = 0 To m_tBI.bmiHeader.biHeight - 1 bDib(x, y) = 0 bDib(x + 1, y) = Rnd * 255 bDib(x + 2, y) = Rnd * 255 Next y Next x End If ' Clear the temporary array descriptor ' This is necessary under NT4. CopyMemory ByVal VarPtrArray(bDib), 0&, 4 End SubPublic Sub ClearUp()Sub ClearUp() If (m_hDC <> 0) Then If (m_hDIb <> 0) Then SelectObject m_hDC, m_hBmpOld DeleteObject m_hDIb End If DeleteObject m_hDC End If m_hDC = 0: m_hDIb = 0: m_hBmpOld = 0: m_lPtr = 0End SubPublic Function Resample()Function Resample( _ ByVal lNewHeight As Long, _ ByVal lNewWidth As Long _ ) As cDIBSectionDim cDib As cDIBSection Set cDib = New cDIBSection If cDib.Create(lNewWidth, lNewHeight) Then If (lNewWidth <> m_tBI.bmiHeader.biWidth) Or (lNewHeight <> m_tBI.bmiHeader.biHeight) Then ' Change in size, do resample: ResampleDib cDib Else ' No size change so just return a copy: cDib.LoadPictureBlt m_hDC End If Set Resample = cDib End IfEnd FunctionPrivate Function ResampleDib()Function ResampleDib(ByRef cDibTo As cDIBSection) As BooleanDim bDibFrom() As ByteDim bDibTo() As ByteDim tSAFrom As SAFEARRAY2DDim tSATo As SAFEARRAY2D ' Get the bits in the from DIB section: With tSAFrom .cbElements = 1 .cDims = 2 .Bounds(0).lLbound = 0 .Bounds(0).cElements = m_tBI.bmiHeader.biHeight .Bounds(1).lLbound = 0 .Bounds(1).cElements = BytesPerScanLine() .pvData = m_lPtr End With CopyMemory ByVal VarPtrArray(bDibFrom()), VarPtr(tSAFrom), 4 ' Get the bits in the to DIB section: With tSATo .cbElements = 1 .cDims = 2 .Bounds(0).lLbound = 0 .Bounds(0).cElements = cDibTo.Height .Bounds(1).lLbound = 0 .Bounds(1).cElements = cDibTo.BytesPerScanLine() .pvData = cDibTo.DIBSectionBitsPtr End With CopyMemory ByVal VarPtrArray(bDibTo()), VarPtr(tSATo), 4Dim xScale As SingleDim yScale As SingleDim x As Long, y As Long, xEnd As Long, xOut As LongDim fX As Single, fY As SingleDim ifY As Long, ifX As LongDim dX As Single, dy As SingleDim r As Long, r1 As Single, r2 As Single, r3 As Single, r4 As SingleDim g As Long, g1 As Single, g2 As Single, g3 As Single, g4 As SingleDim b As Long, b1 As Single, b2 As Single, b3 As Single, b4 As SingleDim ir1 As Long, ig1 As Long, ib1 As LongDim ir2 As Long, ig2 As Long, ib2 As Long xScale = (Width - 1) / cDibTo.Width yScale = (Height - 1) / cDibTo.Height xEnd = cDibTo.Width - 1 For y = 0 To cDibTo.Height - 1 fY = y * yScale ifY = Int(fY) dy = fY - ifY For x = 0 To xEnd fX = x * xScale ifX = Int(fX) dX = fX - ifX ifX = ifX * 3 ' Interpolate using the four nearest pixels in the source b1 = bDibFrom(ifX, ifY): g1 = bDibFrom(ifX + 1, ifY): r1 = bDibFrom(ifX + 2, ifY) b2 = bDibFrom(ifX + 3, ifY): g2 = bDibFrom(ifX + 4, ifY): r2 = bDibFrom(ifX + 5, ifY) b3 = bDibFrom(ifX, ifY + 1): g3 = bDibFrom(ifX + 1, ifY + 1): r3 = bDibFrom(ifX + 2, ifY + 1) b4 = bDibFrom(ifX + 3, ifY + 1): g4 = bDibFrom(ifX + 4, ifY + 1): r4 = bDibFrom(ifX + 5, ifY + 1) ' Interplate in x direction: ir1 = r1 * (1 - dy) + r3 * dy: ig1 = g1 * (1 - dy) + g3 * dy: ib1 = b1 * (1 - dy) + b3 * dy ir2 = r2 * (1 - dy) + r4 * dy: ig2 = g2 * (1 - dy) + g4 * dy: ib2 = b2 * (1 - dy) + b4 * dy ' Interpolate in y: r = ir1 * (1 - dX) + ir2 * dX: g = ig1 * (1 - dX) + ig2 * dX: b = ib1 * (1 - dX) + ib2 * dX ' Set output: If (r < 0) Then r = 0 If (r > 255) Then r = 255 If (g < 0) Then g = 0 If (g > 255) Then g = 255 If (b < 0) Then b = 0 If (b > 255) Then b = 255 End If xOut = x * 3 bDibTo(xOut, y) = b bDibTo(xOut + 1, y) = g bDibTo(xOut + 2, y) = r Next x Next y ' Clear the temporary array descriptor ' This is necessary under NT4. CopyMemory ByVal VarPtrArray(bDibFrom), 0&, 4 CopyMemory ByVal VarPtrArray(bDibTo), 0&, 4End FunctionPrivate Sub Class_Terminate()Sub Class_Terminate() ClearUpEnd Sub