DLI Implementation and Reference Guide - Datalogics

1.2 DLI Implementation and Reference Guide
An Introduction to DLI
The Datalogics Interface (DLI) facilitates the rapid creation of PDF documents and
improves performance, throughput and graphics handling. It does this by bypassing
many of the functions of the PDF Edit layer and eliminating redundant calls to the
COS layer used in the Adobe® PDF Library. For information on the various layers of
Adobe PDF Library please see the Acrobat Core API Overview.
How to Create a PDF Document with
DLI
The DLI package exists at the output end of the page creation process. As such, most
of the intricacies of line breaking, page breaking and general composition are outside
of its scope.
The process of writing pages is where this package fits into an application. An
overview of this process follows:
1 Initialize DLI. (start of all processing)
2 Define the document.
3 Define fonts: i.e. Identify and describe each font to be used in the job to DLI.
These can be done as encountered, if so desired.
4 Define forms: i.e. Identify and describe each form to be used in the job to DLI.
These can be done as encountered, if so desired.
5 Define graphics: i.e. Identify and define each graphic to be used multiple times to
DLI. These can be done as encountered, if so desired.
6 For each page:
• Create a dlpdfpage object.
• Create a dlpdfcontent object.
7 Generate the content of a single page:
• For each graphic reference on the page, create the graphic in content.
• For each text line on the page, create the text in content.
8 End the content and inform DLI that the content is complete.
9 End the page and inform DLI that the page is complete.