smooth line error. about fl_imgtk HOT 5 CLOSED

        // step of X.
        if ( ( 2*e2 ) >= -dx )
        {
            for( e2 += dy, y3 = y1; (e2 < ed*wd) && ((y2 != y3) || (dx > dy)); e2 += dx )
            {
                int xfix = 0;
                
                dr = abs( e2 ) / ed - wd + 1.f;
                fl_imgtk_dla_plot( img, x1, y3 += sy, col, __MIN( 1.f, 1.f - dr ) );
            }
            
            if ( x1 == x2 )
                break;
            
            e2   = err; 
            err -= dy;
            x1  += sx;
        }