這篇文章主要介紹了C#自動生成漂亮的水晶效果頭像的實現代碼，有需要的朋友可以參考一下
與其他的微博系統相同，在“多可內網微博系統”的用戶也可上傳自己的頭像，並支持頭像裁剪。 但“多可內網微博系統”的頭像可以更漂亮，因為系統實現了水晶效果的頭像。 C#程序實現水晶效果頭像的過程是： （1）圖像縮略到寬度或高度=90的頭像； （2）由用戶選擇合適的位置裁剪90x90的最終頭像； （3）添加水晶效果； 代碼奉獻： 代碼如下: /// <summary> /// 繪制水晶效果的頭像 /// </summary> /// <param name="containsPage"></param> /// <param name="w"></param> /// <param name="h"></param> /// <param name="MemoString"></param> public static void Avatar(Page containsPage, string filename, int r, int m, int s, int x, int y, bool save, string new_avatar) { System.Drawing.Image imageSrc = System.Drawing.Image.FromFile(HttpContext.Current.Server.MapPath("/") + filename); int w = imageSrc.Width; int h = imageSrc.Height; if (r == 1 || r == 3) { h = imageSrc.Width; w = imageSrc.Height; } if (save) { w = h = 90; } if (w > 300) w = 300; if (h > 300) h = 300; Color backColor = Color.DarkTurquoise; Size size = new Size(w, h); System.Drawing.Bitmap btnbmp = new Bitmap(w, h); Graphics g = Graphics.FromImage(btnbmp); //重置背景顏色,可以自定義 g.Clear(Color.White); Color clr = backColor; g.SmoothingMode = SmoothingMode.AntiAlias;//消除鋸齒 g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality; g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; // 創建按鈕圖形－刷子 int btnOff = 0;//按鈕邊距 Rectangle rc1 = new Rectangle(btnOff, btnOff, size.Width - 1 - btnOff, size.Height - 1 - btnOff); GraphicsPath gpath1 = GetGraphicsPath(rc1, 10); GraphicsPath gpath1a = GetGraphicsPath(rc1, 15); LinearGradientBrush br1 = new LinearGradientBrush(new Point(0, 0), new Point(0, rc1.Height + 6), clr, Color.White); // 創建按鈕陰影－刷子 int shadowOff = 1;//陰影邊距 Rectangle rc2 = rc1; rc2.Offset(0, shadowOff); GraphicsPath gpath2 = GetGraphicsPath(rc2, 10); PathGradientBrush br2 = new PathGradientBrush(gpath2); br2.CenterColor = Color.FromArgb(0, 0, 0); // Color.Black; br2.SurroundColors = new Color[] { Color.FromArgb(64, 64, 64, 64), Color.FromArgb(64, 128, 128, 128) }; // SystemColors.ButtonFace // 為了更逼真，我們將漸變結束顏色設定為窗體前景色，可以根據窗口的前景顏色適當調整 // 創建按鈕頂部白色漸變－刷子 Rectangle rc3 = rc1; rc3.Inflate(-1, -1); rc3.Height = 15; GraphicsPath gpath3 = GetGraphicsPath(rc3, 10); LinearGradientBrush br3 = new LinearGradientBrush(rc3, Color.FromArgb(255, Color.White), Color.FromArgb(0, Color.White), LinearGradientMode.Vertical); //繪制圖形 //繪制陰影 if (s > 0) { g.FillPath(br2, gpath2); } //繪制按鈕 if (s > 0) { g.FillPath(br1, gpath1); } //if (s > 0) //{ g.SetClip(gpath1a, CombineMode.Replace); //} switch (m) { case 1: _currentBitmap = (Bitmap)imageSrc; RotateFlip(RotateFlipType.RotateNoneFlipX); imageSrc = (System.Drawing.Image)_currentBitmap; break; case 2: _currentBitmap = (Bitmap)imageSrc; RotateFlip(RotateFlipType.RotateNoneFlipY); imageSrc = (System.Drawing.Image)_currentBitmap; break; default: break; } switch (r) { case 1: _currentBitmap = (Bitmap)imageSrc; RotateFlip(RotateFlipType.Rotate90FlipNone); imageSrc = (System.Drawing.Image)_currentBitmap; break; case 2: _currentBitmap = (Bitmap)imageSrc; RotateFlip(RotateFlipType.Rotate180FlipNone); imageSrc = (System.Drawing.Image)_currentBitmap; break; case 3: _currentBitmap = (Bitmap)imageSrc; RotateFlip(RotateFlipType.Rotate270FlipNone); imageSrc = (System.Drawing.Image)_currentBitmap; break; default: break; } g.DrawImage(imageSrc, -x, -y); //繪制頂部白色泡泡 if (s > 0) { g.FillPath(br3, gpath3); } imageSrc.Dispose(); g.Dispose(); MemoryStream stream = new MemoryStream(); btnbmp.Save(stream, System.Drawing.Imaging.ImageFormat.Png); if (save) { try { //將此 原圖片 以指定格式並用指定的編解碼參數保存到指定文件 string sFile = HttpContext.Current.Server.MapPath("/") + new_avatar; btnbmp.Save(sFile); } catch (System.Exception e) { throw e; } } //輸出圖片containsPage containsPage.Response.Expires = 0; containsPage.Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1); containsPage.Response.AddHeader("pragma", "no-cache"); containsPage.Response.AddHeader("cache-control", "private"); containsPage.Response.CacheControl = "no-cache"; containsPage.Response.Clear(); containsPage.Response.ContentType = "image/png"; containsPage.Response.BinaryWrite(stream.ToArray()); }
