Re: [Qemu-devel] What is the bottleneck?

[André Braga]

On Thu, 30 Sep 2004 19:29:46 +0200, Stefan Kombrink <address@hidden> wrote:
> I had a look at the cirrus rop code, it's not optimized yet, even in CVS.
> I think that's the problem.
> 
> I don't know the hardware specs of the cirrus, but where's the limit of its
> hardware support?
> Is it really necessary to implement a new graphics card?

It's not necessary, but it's desirable if it's done in a "high level"
way, like mapping primitive card instructions to some high-level
acceleration API, like DirectX, OpenGL or Quartz.

> Area copying and area filling is already possible, although not optimized.
> 
> This question might be stupid but why not using
> SDL_FillRect(...) and
> SDL_BlitSurface(....).
> ?
> 
> I think SDL accelerates these operations if supported by your driver.
 
I think it's because at the time nobody bothered to implement those,
and I sincerely don't know how the video emulation is done. I just
observed its effects.

> No promises yet....
> These lines look diffcult to me >8^)

Think of all the good karma you'll get when people start smiling
because of your work to improve QEMU ^_^


cheers,


-- 
"Dealing with failure is easy: Work hard to improve. Success is also
easy to handle: You've solved the wrong problem. Work hard to improve"
Alan J. Perlis