maymudes@husc4.HARVARD.EDU (David M. Maymudes) (04/21/89)
I read on the net that Apple has announced a new version of the LaserWriter
Driver. (Version 6.0, I believe.) According to the posting, the new driver
provides support for printing 8/24/32-bit color images on color printers,
and grayscale images on b/w printers.
Does anyone know exactly what the new driver does and how it is used?
(A program I'm working on currently does a hand-conversion into Postscript,
then uses PostScript facilities for dealing with gray-scale images. It
doesn't seem terribly portable, and has a tendency to stop working whenever
a new printer driver comes out. I didn't write it.)
Disclaimer: I'm not sure the new driver even exists, much less what it does.
--David Maymudes
maymudes%husc4@harvard.ARPA maymudes@husc4.harvard.edu
maymudes@husc4.UUCP maymudes@HARVUNXU.BITNET
..{seismo, harpo, ihnp4, linus, allegra, ut-sally}!harvard!husc4!maymudes
davidm@harvarda.BITNETedmoy@violet.berkeley.edu (04/23/89)
In article <1665@husc6.harvard.edu> maymudes@husc4.UUCP (David M. Maymudes) writes: > >I read on the net that Apple has announced a new version of the LaserWriter >Driver. (Version 6.0, I believe.) According to the posting, the new driver >provides support for printing 8/24/32-bit color images on color printers, >and grayscale images on b/w printers. > >Does anyone know exactly what the new driver does and how it is used? > >(A program I'm working on currently does a hand-conversion into Postscript, >then uses PostScript facilities for dealing with gray-scale images. It >doesn't seem terribly portable, and has a tendency to stop working whenever >a new printer driver comes out. I didn't write it.) > >Disclaimer: I'm not sure the new driver even exists, much less what it does. > > > --David Maymudes > >maymudes%husc4@harvard.ARPA maymudes@husc4.harvard.edu >maymudes@husc4.UUCP maymudes@HARVUNXU.BITNET >..{seismo, harpo, ihnp4, linus, allegra, ut-sally}!harvard!husc4!maymudes >davidm@harvarda.BITNET I've been trying it out experimentally for a day or so. As the author of macps/prepfix, I will be making modifications to prepfix to support version 6.0, which has many changes in it from previous LaserPreps. Anyways, my tests involve using Canvas 2.0 on a color Mac II (under 6.0.3). My first test (something I'd done before and was dissapointed at) was to create 5 filled rectangles and labeled with text. Each rectangle and text pair was assigned one of the colors black, red, blue, green and white, and everything appears correctly colored on the screen. Under LaserWriter 5.2, every rectangle and text prints in black, including the "white" color! Under LaserWriter 6.0, which I just installed by dragging them into the System Folder and going through Chooser, black is black, red, blue and green are a dark gray color and white is white (and thus invisible). My second test was to print one of Canvas's color demo drawings, a set of color car mufflers with light shawdows. Under LW 5.2, all mufflers come out black, as does the shadows. Under LW 6.0, the mufflers are different shades of gray, while the shadows are a light shade of gray. It looks very good. So it looks like a programs using standard color quickdraw will automatically come out in gray-scale on a black and white printer. The new LW 6.0 dialog box has a button to choose between gray scale and color, so I assume if you had a color PostScript printer, it would be in color. Edward Moy Principal Programmer - Macintosh & Unix Workstation Support Services Workstation Software Support Group University of California Berkeley, CA 94720 edmoy@violet.Berkeley.EDU ucbvax!violet!edmoy
kent@lloyd.camex.uucp (Kent Borg) (04/24/89)
OK, it sounds like LaserWriter Driver 6.0 (or some-such driver I don't yet have) will do gray-scale printing of QuickDraw boxes, circles, etc. Great, but what happens to color (or black and white) scanned pictures? Does this new LaserWriter Driver properly convert pixMaps into PostScript? Thanks. Kent Borg ...!husc6!lloyd!kent