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From: bj@cbmvax.commodore.com (Brian Jackson)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: I can't get Flood() to work!
Message-ID: <21486@cbmvax.commodore.com>
Date: 11 May 91 07:03:24 GMT
References: <15629@darkstar.ucsc.edu> <3238@sirius.ucs.adelaide.edu.au>
Reply-To: bj@cbmvax.commodore.com (Brian Jackson)
Organization: Commodore, West Chester, PA
Lines: 41

In article <3238@sirius.ucs.adelaide.edu.au> jpotter@ucs.adelaide.edu.au (Jonathan Potter) writes:
>In article <15629@darkstar.ucsc.edu> davids@ucscf.UCSC.EDU (Dave Schreiber) writes:
>>I'm having a problem figuring out how the Flood() function works.  I've
>>been able to get flood mode #0 (flood to the outline color) to work, but
>>it's incredibly slow (even on my 3000), and not really what I want anyway.
>>Mode #1 (flood the block of color at the given coordinates), on the other
>>hand, looks like it will fit the bill, but I haven't been able to get it to
>>work.  Here's a code sample that illustrates what I'm trying to do
>
>You need to allocate a TmpRas, and set the TmpRas pointer of the rastport to
>that. The TmpRas (presumably short for temporary rastport) is the same height
>and width as your window's rastport, but only one bit-plane deep. Check the RKM
>for more info, as I can't remember exactly how its done of the top of my head.

>Jon

It goes something like:

struct TmpRas myTmpRas ;
PLANEPTR *trptr ;
struct Window *myWindow ;
LONG bits_wide, bits_high ;
 ...
  
 OpenWindow() ...
  
 ...
  
if(trptr = AllocRaster( bits_wide, bits_high))
{
    InitTmpRas( &myTmpRas, trptr, (LONG)(RASSIZE(bits_wide,bits_high))) ;
    myWindow->RPort->TmpRas = &myTmpRas ;
}

Brian

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 | Brian Jackson  Software Engineer, Commodore-Amiga Inc.  GEnie: B.J. |
 | bj@cbmvax.cbm.commodore.com    or  ...{uunet|rutgers}!cbmvax!bj     |
 | "My beer comes from farther away than your beer."                   |
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