home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.sys.mac.misc:20580 comp.sys.mac.advocacy:3288 comp.sys.mac.system:15166 comp.sys.mac.hardware:24016
- Path: sparky!uunet!usc!sdd.hp.com!wupost!emory!ogicse!das-news.harvard.edu!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!andrew.cmu.edu!fj05+
- From: fj05+@andrew.cmu.edu (Faisal Nameer Jawdat)
- Newsgroups: comp.sys.mac.misc,comp.sys.mac.advocacy,comp.sys.mac.system,comp.sys.mac.hardware
- Subject: Re: Mac & IBM Info (added Info)
- Message-ID: <gf=2Oje00WB7QK0Jg0@andrew.cmu.edu>
- Date: 13 Dec 92 20:16:15 GMT
- Article-I.D.: andrew.gf=2Oje00WB7QK0Jg0
- References: <kf_mzeK00VpA4UAngk@andrew.cmu.edu>
- <1gg9hlINN3qb@pith.uoregon.edu>
- Distribution: na
- Organization: Sophomore, Physics, Carnegie Mellon, Pittsburgh, PA
- Lines: 51
- In-Reply-To: <1gg9hlINN3qb@pith.uoregon.edu>
-
- rtaylor@cie.uoregon.edu (Russ Taylor) writes:
- > Not exactly. All 68020+ Macs have the 32-bit color quickdraw routines in
- > ROM. So they are capable of handling 32-bit graphics routines EVEN IF THE
- > MONITOR DOES NOT DISPLAY THEM. It will be dithered to whatever pixel depth
- > you are using, I believe. I don't think PCs have there graphics codes in
- > ROM, do they?
- >
- > This built-in quickdraw becomes important with games like Lemmings and
- > Out of this World, some color printers, and quicktime.
-
- Then you're saying that the pc can't support 24 bit graphics at all?
- Damn near nothing is in the pc's rom. It all depends on what you add
- to it. If you take a basic mac and a basic pc, neither one of them
- will show you 24 bit graphics on screen. If stick a 24 bit graphics
- expansion in either one, it will display 24 bit graphics on screen,
- where an application has need for that many colours. From the user
- standpoint, they're the same. In terms of internal mechanics, you
- make different calls to do the same thing. Telling people that macs
- support 24 (32 bit) graphics and pc's don't is deceptive unless you
- explain what you're talking about. To most people, saying 'machine x'
- supports 24 bit colour graphics, that means that you can turn it on
- and start displaying 24 bit images.
-
- Better phrasing would be:
- Macs have built in definition of how the operating system interacts
- with the video hardware, including up to 32 bit video. PC's have no
- internal definition of how the operating system interacts with the
- video hardware, and leave it up to the os and video hardware in
- question. Most macs have 8 or 16 bit display capability built in, and
- most of those can be expanded to display 24 bit colour. Most pc's
- come with cards that display 8 bit (or occasionally 16 bit) images,
- and similarly, can be upgraded to a 24 bit display card. Software
- such as Windows and OS/2 will have to support your specific display
- card (currently levels of support vary, but support is constantly
- growin - check with your vendor to see what runs what with what), or
- if you're running dos or certain Windows apps that write directly to
- the display hardware, the specific application will have to support
- your display hardware.
-
- As for dithering to whatever your card display, have you ever gotten a
- box that says "Application X requires the monitor to be set in Y
- colors mode. Sorry"? Happens all the time. Is that the application
- refusing to run because the programmer didn't want it to, or the
- application refusing to run because it wants colour support the mac
- won't give it.
-
-
- -- faisal jawdat | "Certainly the game is rigged.
- email: fj05+@andrew.cmu.edu | Don't let that stop you;
- if mail handler barfs | if you don't bet, you can't win."
- fj05@andrew.cmu.edu | -Lazarus Long
-