VB.net Spaar 'n Meta File / EMF as 'n bitmap (Tiff)

Question

Op die oomblik het ek 'n derde party beheer wat 'n meta genereer. Ek kan die WMF lêer op skyf sonder probleem red. Die probleem is hoe ek die meta lewer as 'n TIFF-lêer.

Op die oomblik het ek die volgende kode om my meta en stoor dit kry.

 Dim mf As Metafile = page.GetImage(TXTextControl.Page.PageContent.All)



                        Dim enhMetafileHandle As IntPtr = mf.GetHenhmetafile()

                        Dim h As IntPtr
                        Dim bufferSize As UInteger = GetEnhMetaFileBits(enhMetafileHandle, 0, h)
                        Dim buffer(CInt(bufferSize)) As Byte

                        GetEnhMetaFileBits(enhMetafileHandle, bufferSize, buffer)

                        Dim msMetafileStream As New MemoryStream
                        msMetafileStream.Write(buffer, 0, CInt(bufferSize))


                        Dim baMetafileData() As Byte
                        baMetafileData = msMetafileStream.ToArray
                        Dim g As Graphics = Graphics.FromImage(mf)


                        mf.Dispose()



                        File.WriteAllBytes("c:\a.wmf", baMetafileData)

end sub

_         Openbare Gedeelde Function GetEnhMetaFileBits (ByVal hEMF As System.IntPtr, ByVal NGroote As UInteger, ByVal lpData As IntPtr) As UInteger     End Function

<System.Runtime.InteropServices.DllImportAttribute("gdi32.dll", EntryPoint:="GetEnhMetaFileBits")> _

Public Shared Function GetEnhMetaFileBits(<System.Runtime.InteropServices.InAttribute()> ByVal hEMF As System.IntPtr, ByVal nSize As UInteger, ByVal lpData() As Byte) As UInteger
End Function

Ek het probeer om al die soort van die beeld en Grafiese oproepe en net nie kan verlos nie die meta file as 'n tiff. Enige voorstelle sal wonderlik wees. Ek het selfs probeer om 'n nuwe bitmap skep en trek die meta op dit. Ek beland altyd met 'n uitsondering GDI gegooi.

Answer 1

My finale Kode lyk:

 Dim NewGraphic As Graphics = Nothing
        Dim BitonalImage As Bitmap = Nothing

        Using bmp As New Bitmap(3264, 4224)
            Try

                NewGraphic = Graphics.FromImage(bmp)
                NewGraphic.FillRectangle(New SolidBrush(Color.White), 0, 0, 3264, 4224)
                NewGraphic.InterpolationMode = Drawing2D.InterpolationMode.HighQualityBicubic
                NewGraphic.SmoothingMode = Drawing2D.SmoothingMode.HighQuality
                NewGraphic.PixelOffsetMode = Drawing2D.PixelOffsetMode.HighQuality
                NewGraphic.CompositingQuality = Drawing2D.CompositingQuality.HighQuality
                NewGraphic.TextRenderingHint = Drawing.Text.TextRenderingHint.AntiAliasGridFit

                NewGraphic.DrawImage(MetaFileToConvert, 0, 0, 3264, 4224)

                BitonalImage = CType(ConvertToBitonal(CType(bmp, Bitmap)), Bitmap)
                BitonalImage.SetResolution(385, 385)

                OutBMP = BitonalImage

            Catch ex As Exception
                Throw ex
            Finally
                NewGraphic.Dispose()
                BitonalImage.Dispose()
            End Try

        End Using

Answer 2

Jou kode is moeilik om te ontsyfer. Eenvoudig die tekens van die meta om 'n bitmap moet die werk gedoen te kry. Byvoorbeeld:

Dim mf As Metafile = page.GetImage(TXTextControl.Page.PageContent.All)
Using bmp As New Bitmap(mf.Width, mf.Height)
  Using gr As Graphics = Graphics.FromImage(bmp)
    gr.DrawImage(mf, 0, 0)
  End Using
  bmp.Save("c:\temp\test.tiff", ImageFormat.Tiff)
End Using