Re: analysing a bitmap

On Wed, 25 May 2005 15:06:02 +0200, "Peter Bauer"
<PeterBauer@xxxxxxxx> waffled on about something:

>i'm trying to copy all closed pixels of the same color of a bitmap (only
>black and white)
>
>i got an example on how to do this:
>
><snip>
>
>now i'm trying to modify this for bitmaps, but i allways get a
>stack-overflow in the fill() methode.
>i have no clue whats the problem :(

Really?

Not sure what version of Delphi you are using, but in D5 I had to
remove the variants reference, then change

TempBitmap.Assign(Image1.picture);
to
TempBitmap.Assign(Image1.picture.bitmap);

Then it exploded because you defined myimagemap as a 1 based array,
not 0 based one.

Okay, fixed that... Now the fill routine...

You appear to be getting stuck in a loop... As your fill routine is
self calling this eventually (i.e. a fraction of a second later) blows
the stack limit.

I think this occurs when old colour=colour, although I haven't quite
got my head round your fill logic.

It might be worth sticking some showmessages in your fill routine, or
dumping coordinates to a memo1 box so you can see where it's going,
and what it's doing.

With my test image the y coordinate decreased from where I started to
0 then sat going 0,1,0,1,0,1 until the stack went pop.

Dodgy.
--
MUSHROOMS ARE THE OPIATE OF THE MOOSES
.

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