Bug 688001

Summary:	Ghostscript doesn't generate form XObjects
Product:	Ghostscript	Reporter:	Alex Cherepanov <alex>
Component:	PDF Writer	Assignee:	Igor Melichev <igor.melichev>
Status:	RESOLVED DUPLICATE
Severity:	enhancement
Priority:	P3
Version:	master
Hardware:	PC
OS:	All
Customer:		Word Size:	---
Attachments:	Mailing anniversaire Hippopotamus2.ps.bz2

Description Alex Cherepanov 2005-03-23 11:47:33 UTC

Ghostscript doesn't generate form XObjects from PostScript forms.
The form XObjects are also flattened during PDF to PDF conversion.

This limitation has been known before but a Ghostscript user 
Benjamin Waechter <benj at waechter dot org> has posted a real world
file on comp.lang.postscript that we convert to 17M PDF but 
Distiller 5 converts to 970K .

Comment 1 Alex Cherepanov 2005-03-23 11:48:58 UTC

Created attachment 1264 [details]
Mailing anniversaire Hippopotamus2.ps.bz2

Comment 2 SaGS 2005-03-24 00:55:45 UTC

Bug #687561 "Smaller PDFs when using execform" specifically adresses this 
problem. It also need, for part of its functinality (like forms with XUIDs that 
are loaded into VM more than once), bug #687560 "Invalid PDF if /BP pdfmarks 
with non-unique /_objdef".

Unfortunately, GS has some other bugs in handling pdfmarks that create Form 
XObjects, for example bug #687558 "Wrong clipping path with /SP pdfmark" (the 
subject doesn't tell the whole story) and at least another one that I'm aware 
of but haven't analyzed yet. Both seem to affect the attached sample.

Comment 3 Igor Melichev 2005-03-30 13:09:50 UTC


*** This bug has been marked as a duplicate of 687561 ***