Make Thumb : Bitmap « 2D Graphics « C# / C Sharp

1. C# / C Sharp
2. 2D Graphics
3. Bitmap

Make Thumb

        

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.IO;

namespace Hdnug
{
    /// <summary>
    /// Summary description for ImageUtils
    /// </summary>
    public class ImageUtils
    {
        const int sizeThumb = 69;


        public static byte[] MakeThumb(byte[] fullsize)
        {
            Image iOriginal, iThumb;
            int targetH, targetW;

            iOriginal = Image.FromStream(new MemoryStream(fullsize));
            if (iOriginal.Height > iOriginal.Width)
            {
                targetH = sizeThumb;
                targetW = Convert.ToInt32(iOriginal.Width * (sizeThumb / iOriginal.Height));
            }
            else
            {
                targetW = sizeThumb;
                targetH = Convert.ToInt32(iOriginal.Height * (sizeThumb / iOriginal.Width));
            }
            iThumb = iOriginal.GetThumbnailImage(targetW, targetH, null, System.IntPtr.Zero);
            MemoryStream m = new MemoryStream();
            iThumb.Save(m, System.Drawing.Imaging.ImageFormat.Jpeg);
            return m.GetBuffer();
        }

        public static byte[] MakeThumb(byte[] fullsize, int newwidth, int newheight)
        {
            Image iOriginal, iThumb;
            double scaleH, scaleW;

            Rectangle srcRect = new Rectangle();
            iOriginal = Image.FromStream(new MemoryStream(fullsize));
            scaleH = iOriginal.Height / newheight;
            scaleW = iOriginal.Width / newwidth;
            if (scaleH == scaleW)
            {
                srcRect.Width = iOriginal.Width;
                srcRect.Height = iOriginal.Height;
                srcRect.X = 0;
                srcRect.Y = 0;
            }
            else if ((scaleH) > (scaleW))
            {
                srcRect.Width = iOriginal.Width;
                srcRect.Height = Convert.ToInt32(newheight * scaleW);
                srcRect.X = 0;
                srcRect.Y = Convert.ToInt32((iOriginal.Height - srcRect.Height) / 2);
            }
            else
            {
                srcRect.Width = Convert.ToInt32(newwidth * scaleH);
                srcRect.Height = iOriginal.Height;
                srcRect.X = Convert.ToInt32((iOriginal.Width - srcRect.Width) / 2);
                srcRect.Y = 0;
            }
            iThumb = new Bitmap(newwidth, newheight);
            Graphics g = Graphics.FromImage(iThumb);
            g.DrawImage(iOriginal, new Rectangle(0, 0, newwidth, newheight), srcRect, GraphicsUnit.Pixel);
            MemoryStream m = new MemoryStream();
            iThumb.Save(m, System.Drawing.Imaging.ImageFormat.Jpeg);
            return m.GetBuffer();
        }

        public static byte[] MakeThumb(byte[] fullsize, int maxwidth)
        {
            Image iOriginal, iThumb;
            double scale;

            iOriginal = Image.FromStream(new MemoryStream(fullsize));
            if (iOriginal.Width > maxwidth)
            {
                scale = iOriginal.Width / maxwidth;
                int newheight = Convert.ToInt32(iOriginal.Height / scale);
                iThumb = new Bitmap(iOriginal, maxwidth, newheight);
                MemoryStream m = new MemoryStream();
                iThumb.Save(m, System.Drawing.Imaging.ImageFormat.Jpeg);
                return m.GetBuffer();
            }
            else
            {
                return fullsize;
            }
        }
    }
}

   
    
    
    
    
    
    
    
  

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