Thursday, February 19, 2009

Capture Imgae from Url and Resize it

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.IO;
using System.Net;

public partial class CaptureImage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
int Height, Width;
string strImage = "";
Height = 200;
Width = 200;
Image imgPhotoVert = null;

strImage = http://images.play.com/covers/3472012x.jpg.Replace("../", "").Replace("~/", "");
Stream str = null;
HttpWebRequest wReq = (HttpWebRequest)WebRequest.Create(strImage);
HttpWebResponse wRes = (HttpWebResponse)(wReq).GetResponse();
str = wRes.GetResponseStream();
imgPhotoVert = Image.FromStream(str);
str.Dispose();

Image imgPhoto = null;
imgPhoto = FixedSize(imgPhotoVert, Width, Height);
imgPhoto.Save(Response.OutputStream, ImageFormat.Jpeg);
imgPhoto.Dispose();
imgPhotoVert.Dispose();
}
static Image FixedSize(Image imgPhoto, int Width, int Height)
{
int sourceWidth = imgPhoto.Width;
int sourceHeight = imgPhoto.Height;
int sourceX = 0;
int sourceY = 0;
int destX = 0;
int destY = 0;

float nPercent = 0;
float nPercentW = 0;
float nPercentH = 0;

nPercentW = ((float)Width / (float)sourceWidth);
nPercentH = ((float)Height / (float)sourceHeight);

//if we have to pad the height pad both the top and the bottom
//with the difference between the scaled height and the desired height
if (nPercentH < nPercentW)
{
nPercent = nPercentH;
destX = (int)((Width - (sourceWidth * nPercent)) / 2);
}
else
{
nPercent = nPercentW;
destY = (int)((Height - (sourceHeight * nPercent)) / 2);
}

int destWidth = (int)(sourceWidth * nPercent);
int destHeight = (int)(sourceHeight * nPercent);

Bitmap bmPhoto = new Bitmap(Width, Height, PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

Graphics grPhoto = Graphics.FromImage(bmPhoto);
//------- Experimenting -------------

//-----------------------------------
grPhoto.Clear(Color.White);
grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

grPhoto.DrawImage(imgPhoto,
new Rectangle(destX, destY, destWidth, destHeight),
new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
GraphicsUnit.Pixel);

grPhoto.Dispose();
return bmPhoto;
}
}

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