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resource()

The resource() function returns information about an image resource. It can also be used to check if a file exists.

This function is useful in a Control Script, for example to check the number of pages or the page height and width before setting it as a background (see Control Script: Setting a Print section's background).

resource(location, pageNumber)

location

The location should be a URL relative to the template root or an absolute file-based URL (without protocol), e.g. "C:/myfile.pdf".

pageNumber (optional)

The desired page. Counting starts at 1. If no page number is given, information about the first page will be retrieved.

The returned object is of the type ImageInfo. It has the following fields:

Field	Type	Description
height	float	The height of the current page (in points).
page	Number	Current page number (counting from 1) within the resource.
pages	Number	The total number of pages in the resource.
width	float	The width of the current page (in points)

This script retrieves the second page of a PDF that is present in the template's resources.

var pdf = resource("images/stamp.pdf", 2);
var height = pdf.height;
var width = pdf.width;
var numberOfPages = pdf.pages;

In this script, the function is used to check if a file exists.

if(resource("C:/paw.pdf")){
	//exists
} else {
	//oops
}