/// <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 以指定格式并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());

}