🚀 go-pugleaf

In article <RUJO.91May14173029@ulrik.uio.no> rujo@ulrik.uio.no (Rune J|rgensen) writes:
>With advanced graphics adapters, you may download an entire
>displayfile with vectors. Then you send commands to the adapter,
>asking it to perform a local zoom or redraw. This may be a 100
>or a 1000 times faster than sending vectors one by one.
>
>Is there any way you may utilize smart graphics adapters with
>MS Windows? Or is MoveTTo/LineTo the only way? They PlayMetaFile()

The general answer to this is "Write a display driver."  Windows will
still pass the commands one at a time but instead of setting all the
individual pixels it will send the smart command.  This alone buys
reasonable speedup.

It is also possible to make the display driver deal with a Coprocesser
by queuing up the commands as they come in and executing them in chunks.
This requires a fair amount of Windows display driver knowledge to get
working correctly since Windows deals with things in a serial manner,
but it can be done.

Applications should not depend on the display driver they use if at all
possible.

Ken Sykes
Disclaimer: The above opinions are solely my own.