Re: [B2-devel] Window video experiments

[Christian B. <cb...@st...>]

Hi!

On Thu, Mar 01, 2001 at 02:14:21PM -0800, Brian J. Johnson wrote:
> The subjective performance increase was very noticeable as well. 

Same here.

> Which raises another question:  why isn't one-bit "color"
> supported in Quadra (as opposed to Classic) mode?)

Because this would require 2 and 4 bpp modes as well (MacOS needs contiguous
bit depths) which in turn would require more blitting cases.

(I'm somewhat inclined to dump much of the code in video_x.cpp, add 1/2/4
bpp support to SDL and do all video output via SDL. If we're going to
implement run-time depth switching we would need some kind of "blit any
color depth to any other color depth" feature anyway.)

> In addition, I tried adding an XSync call at the end of every video
> frame

This seems to fix the annoying mouse pointer flicker as well.

> I'd imagine that minimal updates (the existing BII code) would give
> better performance for non-local displays

I'm not so much concerned about this. The VOSF itself should avoid most
unnecessary image transfers.

I've added your patches to the CVS without any #ifdef's. Nice work.

Bye,
Christian

-- 
  / Coding on PowerPC and proud of it
\/ http://www.uni-mainz.de/~bauec002/