How to position text in an existing PDF document with X,Y coordinates

Question

There used to be a CFX PDF tag that could do this.  the company (www.easel2.com) does not appear to exist any more.
This is what i want to do.  I have an existing PDF file that is uploaded by a user.  I want to receive the file, then put a registration number (some text) in the lower left corner of the 2nd page (I don't know the exact x,y coordinate but I can figure that out later).
Does anyone know how I can do this?

Answer 1

Unfortunately, I can not create the PDF.  It is uploaded by the user, and I have to open the PDF, insert the text and save it.  BUT, I did find the solution in a slight roundabout way.
1) Create an image file containing the text I need
2) Use that image file as a watermark with 10 opacity and use the tag's x,y coordinate setting.
Below is the code I found to work:
<!--- Create a blank image that is 500 pixels square. --->
<cfset myImage=ImageNew("",500,500)>
<!--- Set the background color for the image to white. --->
<cfset ImageSetBackgroundColor(myImage,"white")>
<!---Clear the rectangle specified on myImage and apply the background color. --->
<cfset ImageClearRect(myImage,0,0,500,500)>
<!--- Turn on antialiasing. --->
<cfset ImageSetAntialiasing(myImage)>
<!--- Draw the text. ---> 
<cfset attr=StructNew()>
<cfset attr.size=50>
<cfset attr.style="bold">
<cfset attr.font="Verdana">
<cfset ImageSetDrawingColor(myImage,"blue")>
<cfset ImageDrawText(myImage,"PROOF",100,250,attr)>
<!--- Write the text image to a file. --->
<cfimage action="write" source="#myImage#" destination="text.tiff" overwrite ="yes">
<!--- Use the text image as a watermark in the PDF document. --->
<cfpdf action="addwatermark" source="c:/book/1.pdf" image="text.tiff"
    destination="watermarked.pdf" overwrite="yes">