From tfaa-form@tug.org Tue Mar 26 04:43:50 2002
Date: Mon, 25 Mar 2002 23:01:49 +0100
From: tfaa-form@tug.org
To: tfaa-bugreports@tug.org
Subject: TFAA Bug Report Input

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Email: tfaa-form@tug.org
-APP           : illustrator
.CLASS          : critical
.FILE_STATUS       : small example file  attached
.VERSION         : 10.0.1
.OS              : Mac OS X 10.1.3
.TITLE           : PDF files created from Illustrator EPS files do not have correct 
			clipping path
.DESCRIPTION     : 
We recently noticed that PDF files created from Illustrator EPS files using 
Ghostscript exhibited "clipped" edges. It is not always the same edge, is 
often more than one edge, and we are not sure if it always happens, but 
it appears to happen most of the time. We sent an e-mail to a group describing 
this behavior and got the following reply from Arthur Ogawa. We feel that this 
reply sums up the situation rather nicely. 

Part of Arthur's reply follows:

"When this EPS is converted to PDF by Acrobat Dilstiller 5, the clipping can 
be seen, particularly when the PDF file is opened in Illustrator: now we see 
a clipping path surrounding the ellipse. And sure enough, it clips away the 
bottom of the ellise and the right side of the ellipse.

The coordinates of this clipping path appear not to depend upon the 
DSC BoundingBox, HiResBoundingBox, or CropBox statements: when I edit 
those by hand, the clipping path in the Distiller-generated PDF remain unchanged.

The same document, when saved by AI 10 in Version 8 compatability has

%%BoundingBox: 156 367 408 470
%%HiResBoundingBox: 156.6978 367.4648 407.8604 469.7905

and the four crown points of the ellipse are at:

407.8604 418.6279
282.2793 367.4648
156.6978 418.6279
282.2793 469.7905

So the HiRes bounding box appears to be accurate.

The Version 8 compatability file, when distilled, produces a PDF which, when viewed in 
Illustrator, has a clipping path that accurately reflects the bounds of the ellipse.

My conclusion is that the AI 10 EPS file's PDF code contains some sort of misinformation 
that instructs a PDF generator to put a inaccurate clipping path around the ellipse.

Since Gary's method of generating the PDF is to "drop the Illustrator file on TeXShop", 
and he sees a similar artifact, I would say that Acrobat Distiller is not indicated as 
the source of the problem.

Therefore the problem would appear to lie with Adobe Illustrator 10 and its method of 
generating its "private" object."

.FILENAME        : ABR_
.URL_LINK        : http://
.WEEKDAY         : Monday
.MONTH           : 03
.DAY             : 25
.YEAR            : 2002
.NAME            : Gary L. Gray
.EMAIL           : gray@engr.psu.edu
Filename: /Users/gray/Desktop/clip-test.tgz
SubmitButton: Submit