🚀 go-pugleaf

bruno.c...@telepac.pt (Bruno P.Coutinho) wrote:

>jeff.da...@grinder.com (JEFF DALLACQUA) wrote:

>>-> WinG was the predecessor to "DirectDraw", which replaces WinG and is
>>-> far superior.  WinG does not "accelerate" 2D graphics,

This is not quite true

>>-> DirectDraw
>>-> can, but you have to have a DirectDraw driver.  As far as I know,
>>-> only ATI has provided one.  Others will likely follow.


>>The second beta cycle of the Games SDK includes DirectDraw drivers from
>>Tseng, S3, Western Digital, and a couple others I believe(basically 95%
>>of the existing video chip market that Windows 95 already supports,
>>according to MS). The first cycle only included Mach 64 support in
>>DirectDraw and SB16 support in DirectSound(oh yeah, and the second cycle
>>also includes drivers for other sound cards for the later).

I once had a look at WinG.
WinG does a little bit of accelerating. WinG is a library which allows
you to access bitmaps directly in memory to program directly into
them. But the acceleration of WinG is done at the point when the
Bitmaps are copied from the WinG GDI to the SDK GDI or to another WinG
via bitblit so the faster your bitblit works on your graphics
accelerator the faster your WinG games are.  In my opinion the main
problem about WinG is that it doesn't support the dedection of the
monitors redraw period so all the double buffering and redrawing
produces small disortions (every three to four seconds) in the window
because of a bad synchronisation between the refresh and the drawing.
WinG doesn't have routines for sprite programming, no collision
dedection ... which apparently is necessary for game programming. You
have to program everything on your own.

So much for WinG. Does anybody have some information on DirectDraw. I
really would appreciate to know a little bit more about it.


Werner Punz
we...@inflab.uni-linz.ac.at
http://witiko.ifs.uni-linz.ac.at/~werpu
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