public Bitmap GetThumbnail(int width, int height, Color background, Color border, int borderWidth)
{
lock (this)
{
Bitmap thumb = new Bitmap(width, height);
Graphics g = Graphics.FromImage(thumb);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Renderer.GdiRenderer r = new Renderer.GdiRenderer(g);
g.Clear(background);
float isRatio = Format.Width / Format.Height;
float shouldRatio = width / (float)height;
float scale = 1;
SizeF ps = Format.GetPixelSize();
if (isRatio > shouldRatio)
{
float w = ps.Width;
scale = width / w;
}
else
{
float h = ps.Height;
scale = height / h;
}
g.TranslateTransform((width - ps.Width * scale) / 2, (height - ps.Height * scale) / 2);
g.ScaleTransform(scale, scale);
if (this.BackgroundImage != null)
{
r.DrawImage(BackgroundImage,
new RectangleF(new PointF(0, 0), Format.GetPixelSize()));
}
Color bakCol = this.BackgroundColor1;
this.BackgroundColor1 = Color.Transparent;
this.Draw(r);
this.BackgroundColor1 = bakCol;
g.ResetTransform();
using (Pen p = new Pen(border, borderWidth))
{
g.DrawRectangle(p, new Rectangle(borderWidth / 2, borderWidth / 2,
width - borderWidth, height - borderWidth));
}
return(thumb);
}
}
public override void DrawImage(Image img, RectangleF rect)
{
r.DrawImage(img, rect);
}
