/// <summary>
/// Saves a jpeg BitMap to disk with a jpeg quality setting.
/// Does not dispose the bitmap.
/// </summary>
/// <param name="bmp">Bitmap to save</param>
/// <param name="outputStream">Binary stream to write image data to</param>
/// <param name="jpegQuality"></param>
/// <returns></returns>
public static bool SaveJpeg(Bitmap bmp, Stream imageStream, long jpegQuality = 90)
{
try
{
//get the jpeg codec
ImageCodecInfo jpegCodec = null;
if (Encoders.ContainsKey("image/jpeg"))
{
jpegCodec = Encoders["image/jpeg"];
}
EncoderParameters encoderParams = null;
if (jpegCodec != null)
{
//create an encoder parameter for the image quality
EncoderParameter qualityParam = new EncoderParameter(Encoder.Quality, jpegQuality);
//create a collection of all parameters that we will pass to the encoder
encoderParams = new EncoderParameters(1);
encoderParams.Param[0] = qualityParam;
}
bmp.Save(imageStream, jpegCodec, encoderParams);
}
catch
{
return(false);
}
return(true);
}
public static ImageCodecInfo GetEncoderInfo(string mimeType)
{
//do a case insensitive search for the mime type
string lookupKey = mimeType.ToLower();
//the codec to return, default to null
ImageCodecInfo foundCodec = null;
//if we have the encoder, get it to return
if (Encoders.ContainsKey(lookupKey))
{
//pull the codec from the lookup
foundCodec = Encoders[lookupKey];
}
return(foundCodec);
}