private Image GenerateLineImage(ShapeLine line)
{
int w = line.VirtualBounds.Width / Zoom;
int h = line.VirtualBounds.Height / Zoom;
using (Image lineImg = new Bitmap(w == 0 ? 1 : w, h == 0 ? 1 : h))
using (Graphics gh = Graphics.FromImage(lineImg))
using (var pen = ResourceCache.DefaultCache.GetPen(line.DrawingColor, line.BorderWidth, PenAlignment.Inset, line.LineDashStyle))
{
gh.Clear(Color.Transparent);
gh.DrawLine(pen, line.RelationStart, line.RelationEnd);
return(line.FormatImage(lineImg, line.VirtualBounds));
}
}
public void VisitLine(ShapeLine line)
{
int w = line.BorderWidth * Zoom;
Color drawColor = line.BorderColor;
if (drawColor == Color.Black)
{
drawColor = Color.FromArgb(255, 1, 255, 1);
}
using (Image tmpimg = GenerateLineImage(line))
{
InterpolationMode oldmode = Graphics.InterpolationMode;
Graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
Graphics.DrawImage(tmpimg, line.VirtualBounds, 0, 0, tmpimg.Width, tmpimg.Height, GraphicsUnit.Pixel);
Graphics.InterpolationMode = oldmode;
}
}
