/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "common/system.h"
#include "common/timer.h"

#include "chamber/chamber.h"
#include "chamber/common.h"
#include "chamber/cga.h"
#include "chamber/script.h"
#include "chamber/resdata.h"

namespace Chamber {


void animateGauss(byte *target) {
	byte *sprite;
	byte phase = getRand() % 4;
	if (phase == script_byte_vars.gauss_phase)
		phase = (phase + 1) % 4;
	script_byte_vars.gauss_phase = phase;
	sprite = gauss_data + 8 + phase * (8 * 30);
	cga_Blit(sprite, 8, 8, 30, target, 80); /*draw to 0:4*/
}

void timerCallback(void *refCon) {
	script_byte_vars.timer_ticks++;
	if (!script_byte_vars.game_paused) {
		if (script_byte_vars.timer_ticks % 16 == 0) {
			script_word_vars.timer_ticks2 = Swap16(Swap16(script_word_vars.timer_ticks2) + 1);
#if 1
			animateGauss(frontbuffer);
#endif
		}
	}
}

void initTimer(void) {
	g_system->getTimerManager()->installTimerProc(&timerCallback, 1000000 / 16, NULL, "mainTimer");
}

void uninitTimer(void) {
	g_system->getTimerManager()->removeTimerProc(&timerCallback);
}

} // End of namespace Chamber