#region 文字生成镂空图片 

        static string BuildTextImage(string text, string bgImage)

        {

            int ImgWidth = , ImgHeight = , StartSize = ;

            #region 复制背景图特殊颜色填写文字--


            var bucket = OpenUtility.GetBucket(bgImage);

            var result = FileHub.GetStream(bucket, bgImage);

            if (result.Status != UFile.Data.ActionStatus.SUCCESS)

            {

                return "";

            }

            var stream = result.Data;

            Bitmap bitmap = new Bitmap(stream);

            ImgWidth = bitmap.Width;

            ImgHeight = bitmap.Height;

            Graphics g = Graphics.FromImage(bitmap);

            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;

            g.FillRectangle(new SolidBrush(Color.White), , , bitmap.Width, bitmap.Height);

            using (Font font1 = new Font("Arial", , FontStyle.Bold, GraphicsUnit.Pixel))

            {

                Rectangle rect1 = new Rectangle(, , ImgWidth, ImgHeight);

                StringFormat stringFormat = new StringFormat();

                stringFormat.Alignment = StringAlignment.Center;

                stringFormat.LineAlignment = StringAlignment.Center;

                g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;

                Font goodFont = FindGoodFont(g, text, rect1.Size, font1, GraphicsUnit.Pixel);

                g.DrawString(text, goodFont, Brushes.Black, rect1, stringFormat);

            }

            g.Dispose();

            //bitmap.Save(text + ".jpg", ImageFormat.Jpeg);

            #endregion

            #region 画格子

            Bitmap reff = new Bitmap(ImgWidth, ImgHeight);

            Graphics gi = Graphics.FromImage(reff);

            Image img = Image.FromStream(stream);

            gi.DrawImage(img, new Rectangle(, , ImgWidth, ImgHeight));

            var rows = ImgHeight / StartSize;

            var cols = ImgWidth / StartSize;

            var coords = new List<string>();

            for (int j = ; j < rows; j++)

            {

                for (int i = ; i < cols; i++)

                {

                    var total = StartSize * StartSize;

                    var cur = ;

                    for (int ii = ; ii < StartSize; ii++)

                    {

                        for (int jj = ; jj < StartSize; jj++)

                        {

                            var posx = i * StartSize + ii;

                            var posy = j * StartSize + jj;

                            byte color = bitmap.GetPixel(posx, posy).R;

                            if (color == )

                            {

                                cur++;

                                reff.SetPixel(posx, posy, Color.Transparent);

                            }

                        }

                    }

                    if (cur > total * 0.02)

                    {

                        coords.Add("[" + i + "," + j + "]");

                    }

                }

            }

            //StreamWriter sw = new StreamWriter(text + ".txt");

            //sw.Write("[" + string.Join(",", coords.ToArray()) + "]");

            //sw.Close();

            gi.Dispose();

            string path = string.Empty;

            //reff.Save("d:\\"+Guid.NewGuid.ToString() + "_cover.png", ImageFormat.Png);

            using (var ms = new System.IO.MemoryStream())

            {

                reff.Save(ms, ImageFormat.Png);

                var mime = OpenUtility.GetMimeType(bgImage);

                path = "/Uploads/Files/" + string.Format("{0:yyyy/MM/dd}", DateTime.Now) + "/" + Guid.NewGuid().ToString() + ".png";

                FileHub.Put(bucket, path, ms, mime);

            }

            #endregion 

            return path;

        }

        private static Font FindGoodFont(Graphics Graf, string sStringToFit,

                                    Size TextRoomAvail,

                                    Font FontToUse,

                                    GraphicsUnit FontUnit)

        {

            // Find out what the current size of the string in this font is

            SizeF RealSize = Graf.MeasureString(sStringToFit, FontToUse);

            if ((RealSize.Width <= TextRoomAvail.Width) && (RealSize.Height <= TextRoomAvail.Height))

            {

                // The current font is fine...

                return FontToUse;

            }

            // Either width or height is too big...

            // Usually either the height ratio or the width ratio

            // will be less than 1. Work them out...

            float HeightScaleRatio = TextRoomAvail.Height / RealSize.Height;

            float WidthScaleRatio = TextRoomAvail.Width / RealSize.Width;

            // We'll scale the font by the one which is furthest out of range...

            float ScaleRatio = (HeightScaleRatio < WidthScaleRatio) ? ScaleRatio = HeightScaleRatio : ScaleRatio = WidthScaleRatio;

            float ScaleFontSize = FontToUse.Size * ScaleRatio;

            // Retain whatever the style was in the old font...

            FontStyle OldFontStyle = FontToUse.Style;

            // Get rid of the old non working font...

            FontToUse.Dispose();

            // Tell the caller to use this newer smaller font.

            FontToUse = new Font(FontToUse.FontFamily,

                                    ScaleFontSize,

                                    OldFontStyle,

                                    FontUnit);

            return FontToUse;

        } #endregion