lsr@apple.UUCP (05/12/88)
In article <4WWCvzy00VoDA-hXlh@andrew.cmu.edu> mp1u+@andrew.cmu.edu (Michael Portuesi) writes: > >Color QuickDraw has support for more than eight colors. A recent >color board for the Mac SE supports 16 out of 4096 colors (sound >familiar?) and uses Color QuickDraw. I am not exactly sure what the >capabilities of Color QuickDraw are; time to go seek out one of my >MacFriends. The card for the Mac SE does display something like 16 colors out of 4096, but this is not using Color Quickdraw. Color Quickdraw represents colors as 48-bit RGB values, and CQD picks the closest color that the display can generate. Currently, CQD works with upto 8 bits per pixel, giving 256 colors out of a palette of 16 million. There are 3rd party cards that display all 16 million colors at once. These are implemented as 3 8-bit planes, and CQD is made to draw into the planes separately. Apple is working on direct support for 24 bits per pixel in CQD. -- Larry Rosenstein, Object Specialist Apple Computer, Inc. 20525 Mariani Ave, MS 27-AJ Cupertino, CA 95014 AppleLink:Rosenstein1 domain:lsr@Apple.COM UUCP:{sun,voder,nsc,decwrl}!apple!lsr
ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab) (05/16/88)
In article <5252@xanth.cs.odu.edu> kent@xanth.UUCP (Kent Paul Dolan) writes: >In article <97800007@silver> backstro@silver.bacs.indiana.edu writes: >>I think that the NAPLS system is the best way to go in terms of structured >>color graphics on the Amiga. [ ... ] >> >Again, nice looking on the surface, but a long term mistake. "NAPLPS" >means just what it says: "NORTH AMERICAN Presentation Level Protocol >Syntax;" [ ... ] > >To me, a better idea is to use the official CGM international >standard, and provide drivers (almost surely long ago written) to >convert from CGM to the two TV "standards." [ ... ] Okay, where do I grab a copy of the CGM standard? I want us to do this right. Unlike the IPC and "resources" discussions, there is prior art here. Hence, we can simply draw on the combined expertise of those who walked the path before us, write the code, and Poof! We've got a killer setup. We may even get some CAD companies saying to themselves, "No $#!+! They support CGM? And they cost *how much*? Geez, we could put one on everyone's desk for that..." >Keep trying! This stuff is more fun to read than the flicker fixer wars. > I'm not going to say anything; I'm trying to mature... :-) _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ Leo L. Schwab -- The Guy in The Cape ihnp4!pacbell -\ \_ -_ Recumbent Bikes: dual ---> !{well,unicom}!ewhac O----^o The Only Way To Fly. hplabs / (pronounced "AE-wack") "Work FOR? I don't work FOR anybody! I'm just having fun." -- The Doctor
kent@xanth.UUCP (05/19/88)
In article <5970@well.UUCP> ewhac@well.UUCP (Leo 'Bols Ewhac' Schwab) writes: >In article <5252@xanth.cs.odu.edu> kent@xanth.UUCP (Kent Paul Dolan) writes: >>In article <97800007@silver> backstro@silver.bacs.indiana.edu writes: >>>I think that the NAPLS system is the best way to go in terms of structured >>>color graphics on the Amiga. [ ... ] >>> >>Again, nice looking on the surface, but a long term mistake. "NAPLPS" >>means just what it says: "NORTH AMERICAN Presentation Level Protocol >>Syntax;" [ ... ] >> >>To me, a better idea is to use the official CGM international >>standard, and provide drivers (almost surely long ago written) to >>convert from CGM to the two TV "standards." [ ... ] > > Okay, where do I grab a copy of the CGM standard? Quoted from two articles I set aside a while back: These people are in charge of the X3H3 (Computer Graphics Programming Languages) committee that created the standard: >The address is ANSI X3 Secretariat, 311 First Street, NW, Suite 500, >Washington, DC 20001-2178, USA. I do not have the phone number; sorry. A rather ancient (1981) phone number was: (202) 466-2288. It might still work. The above is the CBEMA office, and you need to get from them the document number for X3H3's Computer Graphics Metafile ANS (American National Standard.) You might also be interested in the CGI (Computer Graphics Interface - the virtual graphics engine interface) ANS. All of the finished standards are ordered through these folks, by document number: >American National Standards Institute, 1430 Broadway, New York, NY 10018 or >call (212) 354-3300. That is ANSI's main office. Be warned, they want an arm and a leg. Don't be surprised to get small change back from $100. Hoping this actually turns out to be helpful. Kent, the man from xanth.