/*

RSP_Software 1982->2009

+55 (41) 9680_2731 - 3473'4370 
arab@rspsoftware.com.br
rspsoftware.com.br
*/

/*
This code can convert all the Windows XP
supported image formats to jpg with very
good quality, the  variable  quality  in
the  function  microsoft_convert defines
this,  feel  free  to  contact  me   for
modifications and enhancements.
*/

using System;
using System.Diagnostics;
using System.IO;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.Drawing;

namespace _your_namespace_here
{

    public class JPG_convert_002
    {





        [DllImport("kernel32.dll")]
        static extern void OutputDebugString(string lpOutputString);

        public static void dprintf(string data)
        {
            data = data + " _debug_";

            OutputDebugString(data);
        }



     /*
     convert   but  with  bad  quality,  avoid  using  this,
     use function microsoft_convert instead  available below
      */
        public static void save_thumbnail(string source_file, string thumb_file, int width, int height)
        {
            System.Drawing.Image pic_tmp;
            pic_tmp = System.Drawing.Image.FromFile(source_file);

            System.Drawing.Image thumb_pic;


            


            thumb_pic = pic_tmp.GetThumbnailImage(width, height, null, System.IntPtr.Zero);
            thumb_pic.Save(thumb_file);

            pic_tmp.Dispose();
            thumb_pic.Dispose();
        }
/*
this is the function to convert to jpeg with good quality
*/      public static void microsoft_convert(string input,string output,int width, int quality)
        {

            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo codec = null;
            for (int i = 0; i < codecs.Length; i++)
            {
                if ("image/jpeg"==codecs[i].MimeType)
                {
                    
                    codec = codecs[i];
                }
            }

            Image mg = Image.FromFile(input);
            int height;


            volta:

            height = Convert.ToInt32((((double)width) / ((double)mg.Width)) * ((double)mg.Height));

/*
change  the  values  as you wish, for me this is ok,
it will limit the width as 800 and the height as 600
*/
            if ((width > 800) || (height > 600))
            {
                width--;
                goto volta;
            }

                     


            Size newSize = new Size(width, height);
           
            Bitmap bp = new Bitmap(newSize.Width, newSize.Height);
            
            Graphics e = Graphics.FromImage(bp);

            
            e.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            e.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

            e.PixelOffsetMode = System.Drawing.Drawing2D . PixelOffsetMode.HighQuality;

            
            Rectangle rect=new     Rectangle(0,0,newSize.Width,newSize.Height);

      e.DrawImage(mg,rect,0,0,mg.Width,mg.Height,GraphicsUnit.Pixel);

      

      if (codec != null)
      {

         

          System.Drawing.Imaging.Encoder myEncoder =
              System.Drawing.Imaging.Encoder.Quality;

          // Create an EncoderParameters object.
          // An EncoderParameters object has an array of EncoderParameter
          // objects. In this case, there is only one
          // EncoderParameter object in the array.
          EncoderParameters myEncoderParameters = new EncoderParameters(1);

          EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, quality);
          myEncoderParameters.Param[0] = myEncoderParameter;
          dprintf("width 7 " + width + " " + height);
          bp.Save(output, codec, myEncoderParameters);

            }

      else
      {
          dprintf("width 7 b " + width + " " + height);
          bp.Save(output);

      }
        }

       


    }
}