DLI Implementation and Reference Guide - Datalogics

Image Display 11.7
Image Compression and Filtering
If the document specifies compression, the bitmap will be compressed with Flate
compression. If the document specifies Seven-Bit Safe mode, the bitmap will be
filtered via ASCII85 to force it into a seven bit safe data format.
dlpdfimagecreatefromps
This method will create a EPS pass-through object in the PDF document. The EPS
graphic is carried in the document, but not imaged by the document reader. Extracting
the document to PostScript will include the object, and it will display in PostScript.
This option is not generally used, but may be needed on occasion.
This method assumes that the text of the EPS object is present as a string in memory.
• The first parameter is a pointer to a document in which this object is to be created.
• The second is a name to be given to this graphic.
• The third and fourth are pointers to a string containing the EPS text and the length
of that string.
• The last parameter is a flag. If it is FALSE, this object will be inserted into the
document only once. If it is TRUE, it will be inserted once for each usage.
This segment of the complete graphics example inserts an EPS pass-through object,
which will display a graphic in the PostScript produced from PDF, but not in the PDF
document itself: