using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace GdiPlus
{
	/// <summary>
	/// ThumbNail : Ãà¼ÒÆÇ À̹ÌÁö ¸¸µé±â
	/// </summary>
	public class ThumbNail : System.Web.UI.Page
	{
		private void Page_Load(object sender, System.EventArgs e)
		{
			//º¯¼ö ÃʱâÈ­
			int boxWidth = 100;
			int boxHeight = 100;
			double scale = 0;

			//ÆÄÀÏ À̸§À» ¼³Á¤
			string strFileName = String.Empty;
			string strSelectedFile = String.Empty;

			if(Request["FileName"] != null)
			{
				strSelectedFile = Request.QueryString["FileName"];
			}
			else
			{
				strSelectedFile = "./sample.jpg";
			}
			strFileName = Server.MapPath(strSelectedFile);

			int tmpW = Convert.ToInt32(Request.QueryString["Width"]);
			int tmpH = Convert.ToInt32(Request.QueryString["Height"]);

			if(tmpW > 0 && tmpH > 0)
			{
				boxWidth = tmpW;
				boxHeight = tmpH;
			}

			//»õ À̹ÌÁö »ý¼º
			Bitmap b = new Bitmap(strFileName);

			//Å©±â ºñÀ²À» °è»êÇÑ´Ù.
			if(b.Height < b.Width)
			{
				scale = ((double)boxHeight)/b.Width;
			}
			else
			{
				scale = ((double)boxWidth)/b.Height;
			}

			//»õ ³Êºñ¿Í ³ôÀ̸¦ ¼³Á¤ÇÑ´Ù.
			int newWidth = (int)(scale*b.Width);
			int newHeight = (int)(scale*b.Height);

			//Ãâ·Â ºñÆ®¸ÊÀ» »ý¼º, Ãâ·ÂÇÑ´Ù.
			Bitmap bOut = new Bitmap(b, newWidth, newHeight);
			bOut.Save(Response.OutputStream, b.RawFormat);

			//¸¶¹«¸®
			b.Dispose();			
			bOut.Dispose();
		}

		#region Web Form µðÀÚÀ̳ʿ¡¼­ »ý¼ºÇÑ ÄÚµå
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: ÀÌ È£ÃâÀº ASP.NET Web Form µðÀÚÀ̳ʿ¡ ÇÊ¿äÇÕ´Ï´Ù.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// µðÀÚÀÌ³Ê Áö¿ø¿¡ ÇÊ¿äÇÑ ¸Þ¼­µåÀÔ´Ï´Ù.
		/// ÀÌ ¸Þ¼­µåÀÇ ³»¿ëÀ» ÄÚµå ÆíÁý±â·Î ¼öÁ¤ÇÏÁö ¸¶½Ê½Ã¿À.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);
		}
		#endregion
	}
}