public static ImageSource GetImage(LineCapExtension join, bool isForEndCap)
{
const int bmpHeight = 24;
const int bmpWidth = 48;
const double lineWidth = bmpHeight * 0.4;
if (null == _interopBitmap)
{
_interopBitmap = new GdiToWpfBitmap(bmpWidth, bmpHeight);
}
using (var grfx = _interopBitmap.BeginGdiPainting())
{
grfx.CompositingMode = sdd.CompositingMode.SourceCopy;
grfx.FillRectangle(System.Drawing.Brushes.Transparent, 0, 0, bmpWidth, bmpHeight);
var linePen = new System.Drawing.Pen(System.Drawing.Brushes.Black, (float)Math.Ceiling(lineWidth));
if (isForEndCap)
{
join.SetEndCap(linePen);
grfx.DrawLine(linePen, 0, 0.5f * bmpHeight, bmpWidth * (1 - 0.25f), 0.5f * bmpHeight);
}
else
{
join.SetStartCap(linePen);
grfx.DrawLine(linePen, 0.25f * bmpWidth, 0.5f * bmpHeight, bmpWidth, 0.5f * bmpHeight);
}
_interopBitmap.EndGdiPainting();
}
var img = new WriteableBitmap(_interopBitmap.WpfBitmap);
img.Freeze();
return(img);
}
