🚀 go-pugleaf

Die skum who are going to flame me for this!

In article <1532.880.uupcb@bville.gts.org>, lanny.cobain@bville.gts.org (Lanny Cobain)  writes:
> What needs to be e done to Josh's Scale/Perspective Unit to make it work
> in Mode X instead of Mode 13h?  Just for a test I tried to scale a 16x16
> bitmap that had been seperated into 4 planes for a quick "PutImage".
> Scaling it up to another multiple of 4 such as 48x48 did not return the
> desired results.  I don't understand why it can't go to another multiple
> of 4 without modifications.  My "PutImage" expects the planes seperated
> by the way, but if the original image already has it done that way I
> don't see why I would have to seperate again on a multiple of 4.
> Anyone????
>                                                                

The Perspective routine can be easily modified to work in ModeX (as it was
originally written to do that).  Bear in mind that it does a column at a time,
so instead of plotting to a buffer, set the bitplane to the correct one and
write the pixel to the VGA screen.

The scaler wasn't.  If you don't need to scale in real-time, you can write a
routine that will convert the bitmap to your format (right now, it is linear,
just like mode 13h).  If you do, you'll have to have a modified putimage that
sets the plane, [1] writes the pixel, adds four to the source offset, and
repeats to [1].

If you need me to post the code for these three things, just post a note in
this newsgroup.

Joshua Jensen
sl8nl@cc.usu.edu

P.S. Why, yes, wReam, this group is dead.