if(bitmap==null)
            {
                return;
            }
            Graphics g=pe.Graphics;

            //转换距阵
            System.Drawing.Drawing2D.Matrix transform;//距阵
            if(flip.Equals(FlipModeStyle.FlipX))
            {
                transform=new System.Drawing.Drawing2D.Matrix(-1,0,0,1,width,0);
            }
            else if(flip.Equals(FlipModeStyle.FlipY))
            {
                transform=new System.Drawing.Drawing2D.Matrix(1,0,0,-1,0,height);
            }
            else if(flip.Equals(FlipModeStyle.FlipXY))
            {
                transform=new System.Drawing.Drawing2D.Matrix(-1,0,0,-1,width,height);
            }
            else
            {
                transform=new System.Drawing.Drawing2D.Matrix(1,0,0,1,0,0);
            }
            //设置转换距阵
            g.Transform=transform;
            g.DrawImage(bitmap,new System.Drawing.Rectangle(0,0,width,height),
                0,0,bitmap.Width,bitmap.Height,
                GraphicsUnit.Pixel);
 &nbs

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