// CallCircle.cpp: implementation of the CCallCircle class.
//
//////////////////////////////////////////////////////////////////////

#include <math.h>
#include <stdlib.h>
#include <search.h>
//#include "myetc.h"

#include "CallCircle.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

int callcircle_xydwCompare(const void *a, const void *b)
{
	SXYDW *aa = (SXYDW *)a;
	SXYDW *bb = (SXYDW *)b;

	if (aa->w < bb->w)
		return -1;
	if (aa->w > bb->w)
		return 1;
	return 0;
}

CCallCircle::CCallCircle(const double r) : m_r(r), m_nb(0)
{
	int rr = (int)r + 1;
	rr *= 2;
	int dd = rr * 2 + 1;
	int dd2 = dd * dd;

	if (dd2 == 0) {
		null();
		return;
	}

	m_c.reset(new SXYDW[dd2]);
	if (!m_c)
		throw SMemAllocError("in callCircle");
	for (int y = -rr; y <= rr; y++)
		for (int x = -rr; x <= rr; x++) {
			double d = sqrt((double)(x * x + y * y));
			if (d <= r && m_nb < dd2) {
				m_c[m_nb].x = x;
				m_c[m_nb].y = y;
				m_c[m_nb].w = d;
				m_nb++;
			}
		}
	qsort(m_c.get(), m_nb, sizeof(SXYDW), callcircle_xydwCompare);
}

void CCallCircle::null()
{
	m_nb = 0;
	m_r = 0.0;
	m_c.reset();
}

CCallCircle::~CCallCircle()
{
	null();
}

void CCallCircle::print()
{
	/*smsg_info(" --- CCallCircle ---");
	smsg_info(" m_nb=%d", m_nb);
	smsg_info(" m_r=%f", m_r);
	for( int i=0; i<m_nb; i++ )
		smsg_info(" %d. = (%d,%d,%f)", i, m_c[i].x,m_c[i].y,m_c[i].w);
	smsg_info(" --- ----------- ---\n");
*/
}

void CCallCircle::draw(UCHAR *drawB, const int lX, const int lY,
					   const int xx, const int yy, const double r)
{
	double aa = 2.0 * r / 3.0; // Size of antialising

	for (int i = 0; i < m_nb && m_c[i].w <= r; i++) {
		double w = m_c[i].w;
		int x = xx + m_c[i].x;
		int y = yy + m_c[i].y;
		if (x >= 0 && y >= 0 && x < lX && y < lY) {
			UCHAR *pDB = drawB + y * lX + x;
			if (w <= aa) {
				*pDB = (UCHAR)255;
			} else {
				double q = 255.0 * (r - w) / (r - aa);
				q = D_CUT_0_255(q);
				UCHAR ucq = UC_ROUND(q);
				(*pDB) = (*pDB) < ucq ? ucq : (*pDB);
			}
		}
	}
}