/// <summary>
/// 2014-04-29 增加红蓝3D效果
/// </summary>
/// <param name="img_path"></param>
/// <param name="b"></param>
/// <param name="img_format"></param>
/// <param name="quality_num"></param>
public static void SaveImage(string img_path, Bitmap b, System.Drawing.Imaging.ImageFormat img_format, int quality_num)
{
ImageCodecInfo myImageCodecInfo = ZImage.GetEncoder(img_format);
System.Drawing.Imaging.Encoder myEncoder;
EncoderParameter myEncoderParameter;
EncoderParameters myEncoderParameters;
myEncoder = System.Drawing.Imaging.Encoder.Quality;
myEncoderParameters = new EncoderParameters(1);
myEncoderParameter = new EncoderParameter(myEncoder, (long)quality_num);//quality_num + "L"); // 0-100
myEncoderParameters.Param[0] = myEncoderParameter;
b.Save(img_path, myImageCodecInfo, myEncoderParameters);
}
/// <summary>
/// 获取背景颜色图片所有路径，渲染专用，请勿改动
/// </summary>
/// <param name="colorCode"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public static string GetBackgroundColorImage(string colorCode, int width, int height)
{
string directoryPath = UploadHelper.Combine(ConfigHelper.SharePath, "Lib", "Background", colorCode);
if (!Directory.Exists(directoryPath))
{
Directory.CreateDirectory(directoryPath);
}
string filePath = Combine(directoryPath, width + "_" + height + ".png");
if (!File.Exists(filePath)) //如果这个背景文件还没有，则生成之
{
Bitmap b = ZImage.DrawBackgroundImg(1, 1, ZImage.Hex2Color(colorCode), 0.7);
b.Save(filePath, ImageFormat.Png);
}
return(filePath);
}
/// <summary>
/// 转换一下图片格式
/// </summary>
/// <param name="orig_img_path"></param>
/// <param name="dest_img_path"></param>
/// <param name="src_fmt"></param>
/// <param name="dest_fmt"></param>
public static void ConvertImage(string orig_img_path, string dest_img_path, ImageFormat dest_fmt, int quality_num)
{
Bitmap b_orig = new Bitmap(orig_img_path);
ImageCodecInfo myImageCodecInfo = ZImage.GetEncoder(dest_fmt);
System.Drawing.Imaging.Encoder myEncoder;
EncoderParameter myEncoderParameter;
EncoderParameters myEncoderParameters;
myEncoder = System.Drawing.Imaging.Encoder.Quality;
myEncoderParameters = new EncoderParameters(1);
myEncoderParameter = new EncoderParameter(myEncoder, (long)quality_num); // 0-100
myEncoderParameters.Param[0] = myEncoderParameter;
b_orig.Save(dest_img_path, myImageCodecInfo, myEncoderParameters);
b_orig.Dispose();
}
/// <summary>
/// 输出一个图片到输出流
/// </summary>
/// <param name="Response"></param>
/// <param name="b"></param>
/// <param name="img_format"></param>
public static void OutPutImage(System.Web.HttpResponse Response, Bitmap b, System.Drawing.Imaging.ImageFormat img_format, TimeSpan?freshness, int quality_num)
{
Response.Clear();
Response.BufferOutput = false; //提高效率
if (freshness.HasValue) //要缓冲
{
DateTime now = DateTime.Now;
Response.Cache.SetExpires(now.Add((TimeSpan)freshness));
Response.Cache.SetMaxAge((TimeSpan)freshness);
Response.Cache.SetCacheability(HttpCacheability.Public);
Response.Cache.SetValidUntilExpires(true);
}
else
{
Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1)); //特别注意
Response.Cache.SetCacheability(HttpCacheability.NoCache); //特别注意
Response.AppendHeader(" Pragma", "No-Cache"); //特别注意
}
ImageCodecInfo myImageCodecInfo = ZImage.GetEncoder(img_format);
System.Drawing.Imaging.Encoder myEncoder;
EncoderParameter myEncoderParameter;
EncoderParameters myEncoderParameters;
myEncoder = System.Drawing.Imaging.Encoder.Quality;
myEncoderParameters = new EncoderParameters(1);
myEncoderParameter = new EncoderParameter(myEncoder, (long)quality_num);//quality_num + "L"); // 0-100
myEncoderParameters.Param[0] = myEncoderParameter;
Response.ContentType = GetContentTypeFromImageFormat(img_format);
b.Save(Response.OutputStream, myImageCodecInfo, myEncoderParameters);
HttpContext.Current.ApplicationInstance.CompleteRequest();
}
