Re: Virtual Screens and stuff in True EU
At 08:34 PM 5/1/99 -0700, you wrote:
>> I want to make one huge virtual screen ... like 2 640 screens wide and like
>> 5 or 8 or so long...Then just access that like its a normal screen for
>> drawing the graphics then just blit out the section i want to see...What i
>> cant seam to do is get it to work... I use locked mem in windows(so it dont
>> get swaped out) i tried
>> off_screen = make_virtual_screen(1024,4800,TrueBlack)
>> then just coping it over to the screen but it didnt line up right
>> btw i uses a 320,200 screen mode to start with...not in true color.. is
that
>> the prob or are my thoughts going down a dead end track?
>>
>> Lost and confused Grape
> One thing to make sure of... Video Chipset support for Virtual screens.
>S3/Virge cards DO NOT, to any of my knowedge, support virtual screens. ATI
>Mach64 (ATI 3D-Pro) Chipset does support virtual screens. Any others, heck
>if I should know :)
actually, since the post was about TrueEU specifically, and it's mechanism
for virtual screens, I feel it appropriate to mention a minor correction
here LEVI...
TrueEU and it's virtual screen support work on s3/virge cards rather well
actually, and work _real_ well when you use the univbe driver
to update the s3/virge cards to vesa2.0/3.0...
the speed gain with univbe on s3 cards and TrueEU is not as much
as the speed gain you get with neil and univbe combined on s3 cards,
but the gain is there...
lastly, virtual screens work on s3cards with neil (and i seem to remember
testing jiri's virtgraph library and it worked also)
hope this helps/clears things up a wee bit :)
--Hawke'
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