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From: | "Damian Yerrick" <web DOT poison AT pineight DOT 8m DOT com> |
Newsgroups: | comp.os.msdos.djgpp |
References: | <Pine DOT SUN DOT 3 DOT 91 DOT 991021170208 DOT 4001C-100000 AT is> <380EF520 DOT C2FAE759 AT connect DOT ab DOT ca> |
Subject: | Re: Plague of the slow 'blit' routine :) |
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NNTP-Posting-Date: | Sat, 23 Oct 1999 19:53:38 GMT |
Distribution: | world |
Date: | Sat, 23 Oct 1999 19:53:38 GMT |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
Tom Fjellstrom <tomcf AT connect DOT ab DOT ca> wrote: > Thank you Eli, > > But I can't be completely sure if the 'bitmap' i'm blitting > to or from is in video memory. If I could then it would > make sense to call the dosmemput or farptr functions > only for those 'bitmaps'. I may be wrong but I don't think > 'regular' memory can (or should?) be accessed with > dosmemput or those farptr functions. The only way I have > thought of determining that a bitmap is in video memory > is too add a variable to the bitmap struct when creating > it to indicate whether or not it is in video memory. If that > is the only safe way of doing it I guess i'll have to. That's the way it was done in Allegro. http://www.talula.demon.co.uk/allegro/ -- Damian Yerrick CM 398, Rose-Hulman Institute of Technology 5500 Wabash Ave | Terre Haute, IN 47803 http://come.to/yerrick <- redpinocchio http://yerricde.tripod.com/ <- pinocchio's brother
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