Sunset

Logotype - JScript

// JavaScript Scripting Example 06
//
// "Logotype"
//

var source;
var destination;
var x;
var y;

source = Request.Item("src");
destination = Request.Item("dest");
x = Request.Item("x");
y = Request.Item("y");

if ((!source) || (source == null))
source = "dimac.bmp";

if ((!destination) || (destination == null))
destination = "ball.jpg";

var errormsg = new String("");
errormsg = Logo();

// Check if errors occured
if (errormsg != "")
DisplayError(errormsg);

// Make the image
function Logo()
{
try
{
  var srcobj;
  var destobj;
  var top;
  var left;
  var path;

  // Fix path
  path = Server.MapPath("..\\images") + "\\";

  srcobj = Server.CreateObject("W3Image.Image");
  destobj = Server.CreateObject("W3Image.Image");

  // Load the source image
  if (srcobj.LoadImage(path + source) == false)
  {
   // Do your error handling here...
   return "Error when loading source image '" + source + "'. Path " + path + source + " is probably invalid.";
  }

  // Load the destination image
  if (destobj.LoadImage(path + destination) == false)
  {
   // Do your error handling here...
   return "Error when loading destination image '" + destination + "'. Path " + path + destination + " is probably invalid.";
  }

  // Add images together with StretchBlt
  srcobj.StretchBltExt(destobj, x, y, srcobj.width, srcobj.height, 0, 0, srcobj.width, srcobj.height, "transparent");

  if (destobj.StreamImage(Response, "JPG", 24) == false )
  {
   // Do your error handling here...
   return "Error when streaming image!";
  }

  // Success
  return "";
}
catch (err)
{
  // Do your error handling here...
  return "Error: " + (err.number & 0xFFFF) + " - " + err.description + ".";
}
}

// Example of a error handler - Displaying the error as a image
function DisplayError(msgcode)
{
// Create an error image
var errorimage = Server.CreateObject("W3Image.Image");
errorimage.CreateEmptySurface(1,1);

// Create and select the font
var fontobj = errorimage.CreateFont("Tahoma",24,0,"normal",0,0x000000,false,false,true);
errorimage.SetFont(fontobj);

// Get size of the error message
var width = errorimage.GetTextWidth(msgcode);
var height = errorimage.GetTextHeight(msgcode);

// Create a surface as large as the error message
errorimage.CreateEmptySurface(width,height);

// Select the font again (font is deselected when creating a new surface)
errorimage.SetFont(fontobj);

// Write the error message
errorimage.DrawText(msgcode,0,0);

// Stream the image containing the error message
errorimage.StreamImage(Response, "JPG", 24);
}