void drow_inner_circle( int x_center, int y_center, int radius, struct color color) // 꽉찬원 draw (x, y, radius, color)
{
int x_coor;
int y_coor;
int p_value;
fb_mmap_temp = (unsigned short *)malloc(myfb->fbvar.xres*myfb->fbvar.yres*2); // 더블버퍼링 임시변수에 screen size 할당
memset(fb_mmap_temp, 0, myfb->fbvar.xres*myfb->fbvar.yres*2); // 더블버퍼 클리어
x_coor = 0;
y_coor = radius;
p_value = 3 - 2 * radius;
while ( x_coor < y_coor)
{
inner_circle( x_center, y_center, x_coor, y_coor, &color);
if ( p_value < 0)
{
p_value += 4 * x_coor +6;
}
else
{
p_value += 4 * ( x_coor -y_coor) +10;
y_coor--;
}
x_coor++;
}
if ( x_coor == y_coor)
inner_circle( x_center, y_center, x_coor, y_coor, &color);
memcpy(myfb->fb, fb_mmap_temp, fbvar.xres*fbvar.yres*2); // mmap에 memory copy (더블 버퍼링)
}
static AbstractMask*
create_doughnut( const DictionaryDatum& d )
{
// The doughnut (actually an annulus) is created using a DifferenceMask
Position< 2 > center( 0, 0 );
if ( d->known( names::anchor ) )
center = getValue< std::vector< double > >( d, names::anchor );
const double outer = getValue< double >( d, names::outer_radius );
const double inner = getValue< double >( d, names::inner_radius );
if ( inner >= outer )
throw BadProperty(
"topology::create_doughnut: "
"inner_radius < outer_radius required." );
BallMask< 2 > outer_circle( center, outer );
BallMask< 2 > inner_circle( center, inner );
return new DifferenceMask< 2 >( outer_circle, inner_circle );
}
