[B2-devel] How to test DGA virtual screen for VOSF

[Andrew T. <rak...@gm...>]

Hi all,

Does anyone know how I can test DGA virtual screen mode?

It is mentioned as something to consider in the VOSF full screen update
code, and I wonder if the code there which seems broken for SDL is actually
intended to be a special case for DGA.

https://github.com/cebix/macemu/blob/29bb3d5a5a99db494049f64c678f38301ef63432/BasiliskII/src/CrossPlatform/video_vosf.h#L547

>From the change where dst_bytes_per_row and scr_bytes_per_row were first
separated (
https://github.com/cebix/macemu/commit/31f80e338b78d8823305d2d6a55fe3511767ecfe
), which seems to only have the effect of skipping over the last partial
chunk of source data in the row, I wonder if DGA virtual screen mode
changes the semantics of the framebuffer in a way that makes that make
sense?

Anything you can tell me, like a vague recollection of some linux distro
this would have been tested on at the time, would be helpful.

Cheers,

-AT