ebergman@isis.cs.du.edu (Eric Bergman-Terrell) (02/10/91)
I have an MS-DOS application that I'm considering porting to MS-Windows 3.0. The application uses the 2 page mode of EGA/VGA cards to do animation. In other words, the program draws to a non-visible page, then makes that page visible, and while that page is displayed, draws the next frame to the non-visible page, etc. Anyway this results in fairly crisp animation... My question: how is this done in Windows 3.0? Will Windows use double- buffered graphics if an EGA or VGA card is in use? Or will it do a software bitblt? In other words: is it possible to do crisp animations that involve the entire screen? Terrell
mcdonald@aries.scs.uiuc.edu (Doug McDonald) (02/10/91)
In article <1991Feb9.182402.24992@isis.cs.du.edu> ebergman@isis.cs.du.edu (Eric Bergman-Terrell) writes: > >I have an MS-DOS application that I'm considering porting to MS-Windows 3.0. >The application uses the 2 page mode of EGA/VGA cards to do animation. In >other words, the program draws to a non-visible page, then makes that page >visible, and while that page is displayed, draws the next frame to the >non-visible page, etc. > >Anyway this results in fairly crisp animation... > >My question: how is this done in Windows 3.0? It isn't >Will Windows use double- >buffered graphics if an EGA or VGA card is in use? Or will it do a >software bitblt? The latter. > >In other words: is it possible to do crisp animations that involve the >entire screen? > > Not in general. Doug McDonald **************************************************************************** Closer folks, closer. This posting is brought to you direct from a Dell 310 running Microsoft Windows in 386 enhanced mode running the native MS-DOS program "snuz", an NNTP News reader/poster and mail poster. Snuz can now be hopefully declared "beta test" rather than "alpha test".