From:	David Jenkins <me AT jenkinsdavid DOT demon DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Memcpying an Allegro Bitmap to an array???
Date:	Wed, 16 Jul 1997 01:36:34 +0100
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Distribution:	world
Message-ID:	<vvhyGAASeBzzEw6o@jenkinsdavid.demon.co.uk>
NNTP-Posting-Host:	jenkinsdavid.demon.co.uk
MIME-Version:	1.0
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I'm trying to memcpy a Bitmap into an array, here's some source which
shows what I mean.

The full source is available at
http://www.jenkinsdavid.demon.co.uk/pschle/3dpsyc04.c


I have a butmap I'm using as a buffer 320*200.



unsigned char   scr_buf[64000]; /* I set this up before the main(){} i.e
it is a global variable. */


void            blur()
{
    int             d,
                    px = 160,
                    py = 100,
                    pxt = 160,
                    pyt = 100,
                    counter = 10,
                    sx,
                    sy,
                    cp,
                    low_x = 1,
                    low_y = 1,
                    max_x = 318,
                    max_y = 198,
                    col_tot,
                   col;



memcpy (scr_buf, buffer, 64000);

    for (sx = low_x; sx < max_x; sx++) {
        for (sy = low_y; sy < max_y; sy++) {
        cp =sx + 320 * sy;
            col_tot = scr_buf[cp-1];
            col_tot += scr_buf[cp+ 1];
            col_tot += scr_buf[cp-320];
            col_tot += scr_buf[cp+ 320];


            col = (col_tot >> 2) - 4; 

            if (col < 1)
                col = 1;

            _putpixel(buffer, sx, sy, col);
        }
    }
}

-- 
http://www.jenkinsdavid.demon.co.uk for C programmers.
David Jenkins

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