Jon Galloway

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Drawing.Imaging;

using System.Web;

using System.Web.SessionState;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.Text;

using System.IO;



namespace AsciiArt

{

    public class WebForm1 : System.Web.UI.Page

    {

        protected System.Web.UI.WebControls.TextBox txtOutput;

        protected System.Web.UI.WebControls.Button btnGo;

        protected System.Web.UI.HtmlControls.HtmlInputFile file;

        protected System.Web.UI.WebControls.TextBox txtInput;

    
        private void Page_Load(object sender, System.EventArgs e)

        {

            if (!Page.IsPostBack)

            {

                StringBuilder input = new StringBuilder();

                for (int i = 0; i < 2500; i++)

                {

                    input.Append("blah ");

                }

                txtInput.Text = input.ToString();

            }

        }



        private string ColorizeText(System.Drawing.Image image, string input)

        {

            //determine how to scale the text

            int textLength = input.Length;

            int imageHeight = image.Height;

            int imageWidth = image.Width;

            double ratio = (double)imageHeight / (double)imageWidth;

            StringBuilder output = new StringBuilder();



            //letters are about twice as tall as wide; correct

            ratio /= 2;



            //height * width = text

            //height / width = ratio

            //width = text / height

            //width = height / ratio

            //height / ratio = length / height

            //height^2 = ratio * text

            //height = sqrt (ratio * text)

            int rows = (int)(Math.Sqrt(ratio * textLength));

            int columns = (int)(textLength / rows);



            //Chop the text into rows, since the word breaks will cause this to be a little 

            //uneven so the exact row count is variable.

            string inputBuffer = input;

            ArrayList rowText = new ArrayList();

            int startPointer = 0;

            int endPointer = columns;



            do 

            {

                endPointer = input.LastIndexOf(" ",(startPointer + columns));

                rowText.Add(input.Substring(startPointer,endPointer-startPointer));

                startPointer = endPointer + 1;

            }

            while (startPointer+columns<=input.Length);



            if (startPointer<input.Length)

                rowText.Add(input.Substring(startPointer));



            using (Bitmap bitmap = new Bitmap(image,columns,rowText.Count))

            {



                output.Append("<span style='font-family: Lucinda Console,Courier New;font-size: 8px;'>");



                int rowCtr = 0;

                int colCtr = 0;



                //Iterate the rows

                foreach (string row in rowText)

                {

                    colCtr = 0;



                    //Iterate each character in the row

                    foreach (char letter in row.ToCharArray())

                    {

                        if (letter == ' ')

                        {

                            output.Append("&nbsp;");

                        }

                        else

                        {

                            Color color = bitmap.GetPixel(colCtr,rowCtr);



                            //If the pizel is white, darken it up a bit.

                            if (color.GetBrightness() > .8)

                                output.AppendFormat("<font color='#{0:X2}{1:X2}{2:X2}'>{3}</font>", (int)(.75*color.R), (int)(.75*color.G), (int)(.75*color.B), letter);

                            else

                                output.AppendFormat("<font color='#{0:X2}{1:X2}{2:X2}'>{3}</font>", color.R, color.G, color.B, letter);

                        }

                        colCtr++;

                    }

                    output.Append("<br>");

                    rowCtr++;

                }

            }

            output.Append("</span>");

            return output.ToString();

        }



        #region Web Form Designer generated code

        override protected void OnInit(EventArgs e)

        {

            //

            // CODEGEN: This call is required by the ASP.NET Web Form Designer.

            //

            InitializeComponent();

            base.OnInit(e);

        }

        
        /// <summary>

        /// Required method for Designer support - do not modify

        /// the contents of this method with the code editor.

        /// </summary>

        private void InitializeComponent()

        {    

            this.btnGo.Click += new System.EventHandler(this.btnGo_Click);

            this.Load += new System.EventHandler(this.Page_Load);



        }

        #endregion



        private void btnGo_Click(object sender, System.EventArgs e)

        {

            try

            {

                using (System.Drawing.Image image = System.Drawing.Image.FromStream(file.PostedFile.InputStream))

                {

                    string colorizedText = ColorizeText(image, txtInput.Text);

                    Response.Write(colorizedText);

                    txtOutput.Text = colorizedText;

                }

            }

            catch (Exception ex)

            {

            }

        }

    }

}

<%@ Page language="c#" Codebehind="Default.aspx.cs" AutoEventWireup="false" validateRequest="false" Inherits="AsciiArt.WebForm1" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

   <HEAD>

      <title>colorizer.r.r.</title>

      <style>

      body {

         font: Tahoma, Arial, sans-serif;

         margin : 15px 0px 0px 15px;

         background : #f3f4fb;

      }

      </style>

   </HEAD>

   <body>

      <form id="Form1" method="post" runat="server">

            <h3>A slightly different take on the ASCII Art thing. This takes your block of ascii text and colorizes it to match the colors in the image you upload. Makes more sense when you see it in action - give it a try:</h3>

            <FIELDSET>

            <LEGEND>1. Upload source image</LEGEND>

            <INPUT type="file" runat="server" id="file">

            </FIELDSET>

            <br>

            <FIELDSET>

            <LEGEND>2. Enter text to be colorized</LEGEND>

            <asp:TextBox id="txtInput" runat="server" Rows="10" Columns="60" TextMode="MultiLine"></asp:TextBox>

            </FIELDSET>

            <br>

            <FIELDSET>

            <LEGEND>3. Delight in your glorious new HTML</LEGEND>

            <asp:TextBox id="txtOutput" runat="server" Rows="10" Columns="60" TextMode="MultiLine"></asp:TextBox></P>

            </FIELDSET>

            <asp:Button id="btnGo" runat="server" Text="Go"></asp:Button></P>

      </form>

   </body>

</HTML>