<%@ LANGUAGE = JScript%>
<%
	// JavaScript Scripting Example 02
	//
	// "Center a text in a large image"
	//
	// Dimac 2002-02-18 (www.dimac.net)
	
	
	var errormsg = new String("");
	errormsg = CenterText();
	
	// Check if errors occured
	if (errormsg != "")
		DisplayError(errormsg);
	
	
	
	// Center a text in the center of a large image
	function CenterText()
	{
		try
		{
			var imageobj;
			var fontobj;
			var text;
			var height;
			var width;
			var top;
			var left;
			var path;
			
			// Fix path
			path = Server.MapPath("..\\..\\images") + "\\";
			
		  	imageobj = Server.CreateObject("W3Image.Image");
		
			// Create a small surface (needed in order to perform font operations)
		  	imageobj.CreateEmptySurface(1,1);
		   
		    // Create and select the font (shadow)
		    fontobj = imageobj.CreateFont("Tahoma",60,0,"normal",0,0x000000,false,false,true);
		    imageobj.SetFont(fontobj);
		
		    // Text to center
		   	text = "w3 Image is the answer...";
		
		    // Get the size of the text
		   	width  = imageobj.GetTextWidth(text);
		   	height = imageobj.GetTextHeight(text);
		
		    // Load the image
			if (imageobj.LoadImage(path + "sunset.jpg") == false)
			{
				// Do your error handling here...
				return "Error when loading image 'sunset.jpg'. Path " + path + "sunset.jpg is probably invalid.";
			}
			
			// Set back to transparency (JPG is not transparent!)
			// New 2.0
			imageobj.bkMode = 1;
			
			// Scale the image (make it double size)
			imageobj.Scale(200);
		
		    // Important!!!! Select the font again (it is lost when creating a new surface)
			imageobj.SetFont(fontobj);
			
			top = ((imageobj.height - height)/2);
			
			if (top < 0)
			 top = 0;
		
			left = ((imageobj.width - width)/2);
			
			if (left <= 0) 
			  left = 0;
			
			// Draw the shadow text
		   	imageobj.DrawText(text, left, top);
			
			// Create and select a new font 
			fontobj = imageobj.CreateFont("Tahoma",60,0,"normal",0,0xE2A701,false,false,true);
		    imageobj.SetFont(fontobj);
			
			// Draw the text again
		   	imageobj.DrawText(text, left + 3, top + 3);
			
		   	if (imageobj.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);
	}
	
%>