using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
   
namespace ImageHandler
{
/// <summary>
/// Summary description for ImageCar
/// </summary>
///
public class ImageCar : IHttpHandler
{
public ImageCar()
{
//
// TODO: Add constructor logic here
//
}
public Bitmap RotateBitmap(float Angle, Bitmap bm_in)
{
try
{
float wid = bm_in.Width;
float hgt = bm_in.Height;
Point[] corners = { new Point(0, 0), new Point(int.Parse(wid.ToString()), 0), new Point(0, int.Parse(hgt.ToString())), new Point(int.Parse(wid.ToString()), int.Parse(hgt.ToString())) };
int cx = int.Parse(wid.ToString()) / 2;
int cy = int.Parse(hgt.ToString()) / 2;
long i;
for (i = 0; i <= 3; i++)
{
corners.X -= Convert.ToInt32(cx.ToString());
corners.Y -= Convert.ToInt32(cy.ToString());
}
float theta = (float)(Angle * Math.PI / 180.0);
float sin_theta = (float)Math.Sin(theta);
float cos_theta = (float)Math.Cos(theta);
float X;
float Y;
for (i = 0; i <= 3; i++)
{
X = corners.X;
Y = corners.Y;
corners.X = (int)(X * cos_theta + Y * sin_theta);
corners.Y = (int)(-X * sin_theta + Y * cos_theta);
}
float xmin = corners[0].X;
float ymin = corners[0].Y;
for (i = 1; i <= 3; i++)
{
if (xmin > corners.X)
xmin = corners.X;
if (ymin > corners.Y)
ymin = corners.Y;
}
for (i = 0; i <= 3; i++)
{
corners.X -= int.Parse(xmin.ToString());
corners.Y -= int.Parse(ymin.ToString());
}
Bitmap bm_out = new Bitmap((int)(-2 * xmin), (int)(-2 * ymin));
Graphics gr_out = Graphics.FromImage(bm_out);
// ERROR: Not supported in C#: ReDimStatement
Point[] temp = new Point[3];
if (corners != null)
{
Array.Copy(corners, temp, Math.Min(corners.Length, temp.Length));
}
corners = temp;
gr_out.DrawImage(bm_in, corners);
return bm_out;
}
catch (Exception ex)
{
string s = ex.Message;
return bm_in;
}
}
public void ProcessRequest(System.Web.HttpContext context)
{
try
{
context.Response.ContentType = "image/gif";
Image origImg = Image.FromFile(context.Server.MapPath("images/car.png"));
Bitmap bm_in = new Bitmap(origImg);
string strAngle = context.Request.Params["angle"].ToString();
Bitmap bmt_dr = RotateBitmap(float.Parse(strAngle), bm_in);
bmt_dr.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);
//writeImage(context);
}
catch (Exception objEx)
{
}
}
public bool IsReusable
{
get
{
return true;
}
}

}
}