Thank you
A simple example:
private Metafile mf;
private Graphics.EnumerateMetafileProc metafileDelegate;
private Point destPoint;
public Test()
{
string file_name = "CRANE.WMF";
mf = new Metafile(file_name);
Graphics gr = picOrig.CreateGraphics();
metafileDelegate = new Graphics.EnumerateMetafileProc(MetafileCallback);
destPoint = new Point(20, 10);
gr.EnumerateMetafile(mf, destPoint, metafileDelegate);
}
private bool MetafileCallback(
EmfPlusRecordType recordType,
int flags,
int dataSize,
IntPtr data,
PlayRecordCallback callbackData)
{
byte[] dataArray = null;
if (data != IntPtr.Zero)
{
// Copy the unmanaged record to a managed byte buffer
// that can be used by PlayRecord.
dataArray = new byte[dataSize];
Marshal.Copy(data, dataArray, 0, dataSize);
}
string l_strData = String.Empty;
try
{
System.Text.Encoding enc = System.Text.Encoding.UTF8;
l_strData = enc.GetString(dataArray);
}
catch
{
l_strData = "N/A";
}
lbDebug.Items.Add(recordType.ToString() + "- Data:" + l_strData);
mf.PlayRecord(recordType, flags, dataSize, dataArray);
return true;
}
Above I am enumerating the EMF file, and that seems to work well. The callback is executed many times, I can see WmfPolygons, WmfPolylines and other eum types. My issue is how to cast the dataArray variable into something I can use.
Essentially, I want to re-create the WMF/EMF step by step. For example if the callback returns a WmfPolyline, how do i get the details of that wmfpolyline? Location, size?
What I do with that data, is recreate the basic shapes using a set of custom classes which have the usual drawing methods (DrawLine, DrawArc, etc.).
How can I do that? This seems like the correct approach, but incomplete. My search of the MSDN was fruitless. Thank you for your help.
