[coLinux-devel] Re: Shared Memory for framebuffer and SDL as sample

[Nuno L. <nt...@nl...>]

No zips here, so you can download it from:

http://quixote.planetaclix.pt/cofb.zip

Regards,
~Nuno Lucas


Nuno Lucas, dando pulos de alegria, escreveu :
> After looking at the CoLinux FB demo (prototype?) I tried to make it 
> work with some of the ideas I had, but SDL doesn't seem to accept 
> transparent windows of any form (it seems the fault is that DirectX 
> doesn't cooperate very well with the basic GDI).
> 
> I finally decided to start a project from scratch to test my ideas, and 
> this is result.
> 
> Attached is the source code and two binaries. I used VS .NET only, so 
> it's normal that the code needs to be modified to build on mingw32.
> 
> * cofb.exe is the FB viewer. If you start it before the driver you need 
> to attach it, using the menu command.
> 
> * cofb_driver.exe is the driver. By default it creates a 640x480x24 
> shared FB, but you can customize it by giving it the values desired 
> (only 16, 24 & 32 bpp, for now).
> As an example: "cofb_driver 800 600 16".
> 
> The program uses a 32 rects long queue for invalidating only partial 
> areas; has locking capabilities (only basic locking, for now); back 
> buffer for fast graphics (using directly the shared FB); random pixels 
> demo; random boxes demo; bouncing box demo & random position transparent 
> boxes. Also it's pure Win32 API, no MFC here.
> 
> One thing I think I see is that with a modern video card (ATI Radeon 
> 9600 SE), it doesn't seem to have much difference updating all or part 
> of the window. You can check this by enabling all tests simultaneously 
> (random pixels mark all screen for refresh).
> 
> Please take a look and feel free to give your opinion.
> 
> NOTE: This it's only meant to work with Win2000/XP.
> 
> Regards,
> ~Nuno Lucas