private void Draw(Graphics g, Rectangle clip)
{
PointF[] pts = new PointF[2];
if (mapDisplay == null)
{
g.Clear(Color.White);
return;
}
CompositeBitmap(false);
FastBitmapPaint.PaintBitmap(g, compositedBitmap, clip, new Point(clip.Left, clip.Top));
}
// This is the main entry point to the ViewCache. It asks to draw the part of the map into the graphics
// requested. This graphics is in pixel (viewport) coordinates. The transform that maps between the
// two is passed in, so that it doesn't need to be recomputed.
public void Draw(Graphics g, Rectangle clipRect, Size sizeView, RectangleF mapAreaToView, Matrix transform)
{
// Make sure the cache is up to date.
UpdateCache(sizeView, mapAreaToView, transform);
try {
// Draw the requested part of the bitmap to the destinated graphics.
FastBitmapPaint.PaintBitmap(g, bitmap, clipRect, new Point(clipRect.Left, clipRect.Top));
// This used to be:
//g.DrawImage(bitmap, clipRect.Left, clipRect.Top, clipRect, GraphicsUnit.Pixel);
}
catch (Exception) {
// Do nothing. Very occasionally, GDI+ given an overflow exception or ExternalException or OutOfMemory exception.
// Just ignore it; there's nothing else to do. See bug #1997301.
}
}