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From: lsr@apple.UUCP (Larry Rosenstein)
Newsgroups: net.micro.mac
Subject: Re: Bug in new Imagewriter driver.
Message-ID: <3665@apple.UUCP>
Date: Sat, 20-Jul-85 15:53:30 EDT
Article-I.D.: apple.3665
Posted: Sat Jul 20 15:53:30 1985
Date-Received: Sun, 21-Jul-85 23:30:32 EDT
References: <263@ttrdc.UUCP>
Reply-To: lsr@apple.UUCP (Larry Rosenstein)
Organization: Advanced Development Group, Apple Computer
Lines: 40

I talked to the person who works on the Imagewriter driver about the
italics characters being clipped and about a problem reported
recently with overprinting in MacWrite.  (The problem: type a
character that overprints; change font; type character to be
overprinted.  Result is that the first character is missing on the
hardcopy.)

His answer was that the problem is with the application not the
printing software.  The printing software simply captures a picture
of each page, images it to form a bitmap, and prints the bitmap.  Any
optimizations (to eliminate whitespace, for example) are done on the
bitmap, so if a character did not appear it was because the
application did not draw it properly.

Some applications try to set the clipping when they draw, but do not
take into account the fact that italics characters extend further to
the right.  The overprinting problem might be caused by MacWrite trying
to do an erase (because of the font change), which wipes out the first
character.

You might try a different program (Microsoft Word instead of MacWrite,
or the memory-based version of MacWrite instead of the disk-based
version), and see the same thing happens.  Also, be sure that you are
not mixing up old/new Imagewriter files with new/old System files.  At
some point in the recent past, the print manager was changed to
support multiple printer drivers.  (This probably occurred with the
System Update.)

If you can isolate the bug, send me a short file that demonstrates it,
and I wil try to report it.  (Be sure to mention what version of
software you were using.)

Thanks.

-- 
Larry Rosenstein
Apple Computer

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