Fill a delimited region with a color in a draw

[elfdav]

Hey guys,

Do you know if there is a simple way to fill a delimited region with a selected color with just one click.
Just like mspaint and many other softwares does.

Just see the attached draw...

For those who know that, i'm looking for the FloodFill API equivalent in Windows world.

Thanks for your help, guys.

David

[skydereign]

If you set up a giant array to hold the values for your canvas, than it is pretty easy with a recursive function (something like this).

Code: Select all

int canv[100][100][3];

void
fill (int x, int y, int r1, int g1, int b1, int r2, int g2, int b2)
{
    canv[y][x][0] = r2; // might also use setpen here if you want this to be what updates your canvas
    canv[y][x][1] = g2;
    canv[y][x][2] = b2;

    if(x+1<100 && canv[y][x+1][0]==r1 && canv[y][x+1][1]==g1 && canv[y][x+1][g]==b1)
    { // right
        fill(x+1, y, r1, g1, b1, r2, g2, b2);
    }
    if(x-1>=0 && canv[y][x-1][0]==r1 && canv[y][x-1][1]==g1 && canv[y][x-1][g]==b1)
    { // left
        fill(x-1, y, r1, g1, b1, r2, g2, b2);
    }
    if(y+1<100 && canv[y+1][x][0]==r1 && canv[y+1][x][1]==g1 && canv[y+1][x][g]==b1)
    { // down
        fill(x, y+1, r1, g1, b1, r2, g2, b2);
    }
    if(y-1>=0 && canv[y-1][x][0]==r1 && canv[y-1][x][1]==g1 && canv[y-1][x][g]==b1)
    { // up
        fill(x, y-1, r1, g1, b1, r2, g2, b2);
    }
}

[elfdav]

Thanks Sky.