public void EnumerateMetafile(Metafile metafile, Point destPoint,
Rectangle srcRect, GraphicsUnit unit,
EnumerateMetafileProc callback, IntPtr callbackData,
ImageAttributes imageAttr) {
IntPtr mf = (metafile == null ? IntPtr.Zero : metafile.nativeImage);
IntPtr ia = (imageAttr == null ? IntPtr.Zero : imageAttr.nativeImageAttributes);
GPPOINT gppoint = new GPPOINT(destPoint);
GPRECT gprect = new GPRECT(srcRect);
int status = SafeNativeMethods.Gdip.GdipEnumerateMetafileSrcRectDestPointI(new HandleRef(this, this.NativeGraphics),
new HandleRef(metafile, mf),
gppoint,
ref gprect,
unchecked((int) unit),
callback,
new HandleRef(null, callbackData),
new HandleRef(imageAttr, ia));
if (status != SafeNativeMethods.Gdip.Ok) {
throw SafeNativeMethods.Gdip.StatusException(status);
}
}
//----------------------------------------------------------------------------------------
// Helper function: Convert GpPoint* memory block to Point[]
//----------------------------------------------------------------------------------------
internal static Point[] ConvertGPPOINTArray(IntPtr memory, int count) {
if (memory == IntPtr.Zero)
throw new ArgumentNullException("memory");
Point[] points = new Point[count];
int index;
GPPOINT pt = new GPPOINT();
int size = (int)Marshal.SizeOf(pt.GetType());
for (index=0; index < count; index++) {
pt = (GPPOINT) UnsafeNativeMethods.PtrToStructure((IntPtr)((long)memory+index*size), pt.GetType());
points[index] = new Point( (int)pt.X, (int) pt.Y);
}
return points;
}
internal static extern int GdipEnumerateMetafileSrcRectDestPointI(HandleRef graphics,
HandleRef metafile,
GPPOINT destPoint,
ref GPRECT srcRect,
int pageUnit,
Graphics.EnumerateMetafileProc callback,
HandleRef callbackdata,
HandleRef imageattributes);
internal static extern int GdipEnumerateMetafileDestPointI(HandleRef graphics,
HandleRef metafile,
GPPOINT destPoint,
Graphics.EnumerateMetafileProc callback,
HandleRef callbackdata,
HandleRef imageattributes);
internal static extern int GdipCreateLineBrushI(GPPOINT point1, GPPOINT point2, int color1, int color2, int wrapMode, out IntPtr lineGradient);
internal static Point[] ConvertGPPOINTArray(IntPtr memory, int count)
{
if (memory == IntPtr.Zero)
{
throw new ArgumentNullException("memory");
}
Point[] pointArray = new Point[count];
GPPOINT gppoint = new GPPOINT();
int num2 = Marshal.SizeOf(gppoint.GetType());
for (int i = 0; i < count; i++)
{
gppoint = (GPPOINT) UnsafeNativeMethods.PtrToStructure((IntPtr) (((long) memory) + (i * num2)), gppoint.GetType());
pointArray[i] = new Point(gppoint.X, gppoint.Y);
}
return pointArray;
}
