private void PaintFigure(ShapeFigure shape)
{
InterpolationMode oldmode = Graphics.InterpolationMode;
Graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
using (Image smallImg = CreateShapeImage(shape, shape.VirtualBounds, shape.BorderWidth * shape.Zoom))
using (Image virtualImg = ImageHelper.ReSizeImage(smallImg, shape.VirtualBounds.Width, shape.VirtualBounds.Height))
using (ImageAttributes imgAttri = new ImageAttributes())
{
imgAttri.SetColorKey((Color)shape.TranColor, (Color)shape.TranColor);
Graphics.DrawImage(virtualImg, shape.VirtualBounds, 0, 0, shape.VirtualBounds.Width, shape.VirtualBounds.Height, GraphicsUnit.Pixel, imgAttri);
Graphics.InterpolationMode = oldmode;
}
}
private static Image CreateShapeImage(ShapeFigure shape, Rectangle innbounds, int borderwidth)
{
innbounds.Width = innbounds.Width < shape.Zoom ? shape.Zoom : innbounds.Width;
innbounds.Height = innbounds.Height < shape.Zoom ? shape.Zoom : innbounds.Height;
Rectangle adjRect = new Rectangle(0, 0, innbounds.Width, innbounds.Height);
int w = adjRect.Width / shape.Zoom < 1 ? 1 : adjRect.Width / shape.Zoom;
int h = adjRect.Height / shape.Zoom < 1 ? 1 : adjRect.Height / shape.Zoom;
using (Image img = new Bitmap(innbounds.Width + 1, innbounds.Height + 1))
{
using (Graphics g = Graphics.FromImage(img))
PaintFigure(g, adjRect, shape, borderwidth);
return(ImageHelper.ReSizeImage(img, w, h));
}
}
private static void PaintFigure(Graphics g, RectangleF innbounds, ShapeFigure shape, int borderwidth)
{
using (GraphicsPath gp = new GraphicsPath())
{
switch (shape.Type)
{
case ShapeType.Rectangle:
gp.AddRectangle(ShapePaintHelper.GetNormalizedRectangle(Rectangle.Round(innbounds)));
break;
case ShapeType.Ellipse:
gp.AddEllipse(ShapePaintHelper.GetNormalizedRectangle(Rectangle.Round(innbounds)));
break;
case ShapeType.UpArrow:
gp.AddPolygon(Rect2PointFArray(Rectangle.Round(innbounds), ArrowDirection.Up));
break;
case ShapeType.DownArrow:
gp.AddPolygon(Rect2PointFArray(Rectangle.Round(innbounds), ArrowDirection.Down));
break;
case ShapeType.RightArrow:
gp.AddPolygon(Rect2PointFArray(Rectangle.Round(innbounds), ArrowDirection.Right));
break;
case ShapeType.LeftArrow:
gp.AddPolygon(Rect2PointFArray(Rectangle.Round(innbounds), ArrowDirection.Left));
break;
default:
return;
}
if (shape.Filled)
{
g.FillPath(ResourceCache.DefaultCache.GetSolidBrush(shape.FillColor), gp);
}
using (Pen pen = ResourceCache.DefaultCache.GetPen(shape.BorderColor, borderwidth, PenAlignment.Inset, shape.LineDashStyle))
g.DrawPath(pen, gp);
}
}
