From: Jim Kjellin <jim.kjellin@sciron.se>
  To  : 'ggi-develop@eskimo.com' <ggi-develop@eskimo.com>
  Date: Mon, 29 Mar 1999 15:27:19 +0200

FW: Visuals 'n stuff

Oops this got sent only to andreas :P. 

> -----Original Message-----
> From:	Jim Kjellin 
> Sent:	Monday, March 29, 1999 3:13 PM
> To:	'andreas.beck@ggi-project.org'
> Subject:	RE: Visuals 'n stuff
> 
> I found something rather intresting/annoying when messing around with
> memory visuals.
> 
> if you do a ggiGetPixelFormat on the visual (this is after the main visual
> for the screen
> has been created btw) which is in 32-bit mode, i got the following:
> red_mask 0x00ff000000
> green_mask 0x0000ff00
> blue_mask 0x000000ff
> red_shift 8
> green_shift 16
> blue_shift 24
> 
> now this looks screwed since this is wrong for my endianesss (intel type),
> what is even
> more screwed is if I make it a 24-bit visual (packed mode) I get the
> _exact_ same values.
> Now shifting 24 times in a 24-bit environment is not healthy for you
> little bits, they tend
> to run home if you try it.
> 
> This was what was messing my code up and when hard-coding (BAD (tm)) the
> shift values it works.
> 
> Fix please? (pretty please)
> 
> --- Jim Kjellin
> 
> -----Original Message-----
> From:	becka@rz.uni-duesseldorf.de [SMTP:becka@rz.uni-duesseldorf.de]
> Sent:	Friday, March 26, 1999 8:10 PM
> To:	ggi-develop@eskimo.com
> Subject:	Re: Visuals 'n stuff
> 
> Hi !
> 
> > I'm currently in the process of porting a game to ggi (mainly linux but
> > other OS's if there is demand).
> 
> Most Unixish OSes should be a piece of cake with GGI ...
> 
> > Since the game was develope under Windows/DX (not by me mind you :P) it
> uses
> > a big bunch surfaces for visual-fx and sprites etc.
> 
> > From what I've gathered surfaces should be replacable with
> memory-visuals
> > under ggi, problem is though when i tried this i got nothing. 
> 
> How did you try ? Could you post some sample code ?
> 
> > Looking at the demos for answers didn't give much since they were all
> > diffrent implementations but I couldn't find any which used multiple
> > visuals.
> 
> demo.c does it for the CrossBlit test. Look for "memvis".
> 
> > Am I on the right track here or do I need rethink the route?
> 
> The track sounds good ...
> 
> CU, Andy
> 
> -- 
> = Andreas Beck                    |  Email :
> <andreas.beck@ggi-project.org> =