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events.cpp
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	#ifdef USE_SDL
	#include <SDL.h>
	#endif
	#ifdef USE_ALLEGRO5
	#include <allegro5/allegro.h>
	#endif
	#include <vector>
	#include <map>
	#include "r-tech1/graphics/bitmap.h"
	#include "r-tech1/events.h"
	#include "r-tech1/exceptions/shutdown_exception.h"
	#include "r-tech1/configuration.h"
	#include "r-tech1/debug.h"
	#include "r-tech1/funcs.h"
	#include "r-tech1/thread.h"
	#include "r-tech1/init.h"
	#include "r-tech1/parameter.h"
	#include "r-tech1/input/keyboard.h"
	#include "r-tech1/input/joystick.h"
	#include "r-tech1/input/input-manager.h"
	#include "r-tech1/input/input-source.h"

	#include "r-tech1/system.h"

	using std::map;

	namespace Util{

	int do_shutdown = 0;

	bool shutdown(){
	return do_shutdown > 0;
	}

	EventManager::EventManager():
	bufferKeys(false),
	deferResize(false){
	resize.enable = false;
	#ifdef USE_ALLEGRO5
	queue = al_create_event_queue();
	if (al_is_keyboard_installed()){
	al_register_event_source(queue, al_get_keyboard_event_source());
	}
	if (al_is_joystick_installed()){
	al_register_event_source(queue, al_get_joystick_event_source());
	}
	if (Graphics::the_display != NULL){
	al_register_event_source(queue, al_get_display_event_source(Graphics::the_display));
	}
	#endif
	}

	#ifdef USE_SDL
	static void handleKeyDown(Keyboard & keyboard, const SDL_Event & event){
	keyboard.press(event.key.keysym.sym, event.key.keysym.unicode);
	}

	static void handleKeyUp(Keyboard & keyboard, const SDL_Event & event){
	keyboard.release(event.key.keysym.sym);
	}

	static void handleJoystickButtonUp(map<int, ReferenceCount<Joystick> > joysticks, const SDL_Event & event){
	int device = event.jbutton.which;
	int button = event.jbutton.button;
	ReferenceCount<Joystick> joystick = joysticks[device];
	if (joystick != NULL){
	joystick->releaseButton(button);
	}
	}

	static void handleJoystickHat(map<int, ReferenceCount<Joystick> > joysticks, const SDL_Event & event){
	int device = event.jhat.which;
	int motion = event.jhat.value;
	ReferenceCount<Joystick> joystick = joysticks[device];
	if (joystick != NULL){
	joystick->hatMotion(motion);
	}

	#if 0
	/* should up/down control left/right -- flip these values? */
	#if WII
	const int axis_up_down = 0;
	const int axis_left_right = 1;
	const int up = 1;
	const int down = -1;
	const int left = -1;
	const int right = 1;
	#else
	const int axis_up_down = 1;
	const int axis_left_right = 0;
	const int up = -1;
	const int down = 1;
	const int left = -1;
	const int right = 1;
	#endif

	switch (motion){
	case SDL_HAT_CENTERED: break;
	case SDL_HAT_UP: joystick->axisMotion(axis_up_down, up); break;
	case SDL_HAT_DOWN: joystick->axisMotion(axis_up_down, down); break;
	case SDL_HAT_RIGHT: joystick->axisMotion(axis_left_right, right); break;
	case SDL_HAT_LEFT: joystick->axisMotion(axis_left_right, left); break;
	default: break;
	}
	#endif
	}

	static void handleJoystickButtonDown(map<int, ReferenceCount<Joystick> > joysticks, const SDL_Event & event){
	int device = event.jbutton.which;
	int button = event.jbutton.button;
	ReferenceCount<Joystick> joystick = joysticks[device];
	if (joystick != NULL){
	joystick->pressButton(button);
	}
	}

	static void handleJoystickAxis(map<int, ReferenceCount<Joystick> > joysticks, const SDL_Event & event){
	int device = event.jaxis.which;
	int axis = event.jaxis.axis;
	int value = event.jaxis.value;
	ReferenceCount<Joystick> joystick = joysticks[device];
	if (joystick != NULL){
	joystick->axisMotion(axis, value);
	}
	}

	void EventManager::runSDL(Keyboard & keyboard, map<int, ReferenceCount<Joystick> > joysticks){
	keyboard.poll();
	for (map<int, ReferenceCount<Joystick> >::iterator it = joysticks.begin(); it != joysticks.end(); it++){
	ReferenceCount<Joystick> joystick = it->second;
	if (joystick != NULL){
	joystick->poll();
	}
	}
	SDL_Event event;
	/* FIXME: android gets into an infinite loop while reading events */
	#ifdef ANDROID
	// int good = SDL_PollEvent(&event);
	// for (int check = 0; check < 10 && good; check++, good = SDL_PollEvent(&event)){
	// if (SDL_PollEvent(&event) == 1){
	while (SDL_PollEvent(&event) == 1){
	#else
	while (SDL_PollEvent(&event) == 1){
	#endif
	switch (event.type){
	case SDL_QUIT : {
	dispatch(CloseWindow);
	break;
	}
	case SDL_KEYDOWN : {
	handleKeyDown(keyboard, event);
	// dispatch(Key, event.key.keysym.sym);
	break;
	}
	case SDL_KEYUP : {
	handleKeyUp(keyboard, event);
	break;
	}
	case SDL_JOYBUTTONDOWN: {
	handleJoystickButtonDown(joysticks, event);
	break;
	}
	case SDL_JOYHATMOTION : {
	handleJoystickHat(joysticks, event);
	break;
	}
	case SDL_JOYBUTTONUP: {
	handleJoystickButtonUp(joysticks, event);
	break;
	}
	case SDL_JOYAXISMOTION: {
	handleJoystickAxis(joysticks, event);
	break;
	}
	case SDL_VIDEORESIZE : {
	int width = event.resize.w;
	int height = event.resize.h;
	/* to keep the perspective correct
	* 640/480 = 1.33333
	*/
	/*
	double ratio = (double) 640 / (double) 480;
	if (width > height){
	height = (int)((double) width / ratio);
	} else {
	width = (int)((double) height * ratio);
	}
	*/
	dispatch(ResizeScreen, width, height);
	break;
	}
	default : {
	break;
	}
	}
	}
	}
	#endif

	#ifdef USE_ALLEGRO
	void EventManager::runAllegro(Keyboard & keyboard, map<int, ReferenceCount<Joystick> > joystick){
	keyboard.poll();
	}
	#endif

	#ifdef USE_ALLEGRO5
	static void handleKeyDown(Keyboard & keyboard, const ALLEGRO_EVENT & event){
	keyboard.press(event.keyboard.keycode, event.keyboard.unichar);
	}

	static void handleKeyUp(Keyboard & keyboard, const ALLEGRO_EVENT & event){
	keyboard.release(event.keyboard.keycode);
	}

	static void handleResize(const ALLEGRO_EVENT & event){
	double width = event.display.width;
	double height = event.display.height;
	/*
	if (width < 640){
	width = 640;
	}
	if (height < 480){
	height = 480;
	}
	*/
	/* to keep the perspective correct
	* 640/480 = 1.33333
	*/
	/*
	double ratio = (double) 640 / (double) 480;
	if (width > height){
	height = width / ratio;
	} else {
	width = height * ratio;
	}
	*/

	ALLEGRO_DISPLAY * display = event.display.source;
	al_acknowledge_resize(display);
	Configuration::setScreenWidth((int) width);
	Configuration::setScreenHeight((int) height);
	al_resize_display(display, (int) width, (int) height);

	Graphics::getScreenBuffer()->clear();

	/*
	ALLEGRO_TRANSFORM transformation;
	al_identity_transform(&transformation);
	// al_scale_transform(&transformation, (double) al_get_display_width(display) / (double) GFX_X, (double) al_get_display_height(display) / (double) GFX_Y);
	al_scale_transform(&transformation, (double) width / (double) GFX_X, (double) height / (double) GFX_Y);
	al_set_target_bitmap(Graphics::getScreenBuffer()->getData()->getBitmap());
	al_use_transform(&transformation);
	*/
	}

	void EventManager::runAllegro5(Keyboard & keyboard, const map<int, ReferenceCount<Joystick> > & joysticks){
	keyboard.poll();

	for (map<int, ReferenceCount<Joystick> >::const_iterator it = joysticks.begin(); it != joysticks.end(); it++){
	ReferenceCount<Joystick> joystick = it->second;
	if (joystick != NULL){
	joystick->poll();
	}
	}

	ALLEGRO_EVENT event;
	while (al_get_next_event(queue, &event)){
	switch (event.type){
	/*
	case ALLEGRO_EVENT_KEY_DOWN: {
	Global::debug(0) << "Key down " << event.keyboard.keycode << std::endl;
	handleKeyDown(keyboard, event);
	break;
	}
	*/
	case ALLEGRO_EVENT_DISPLAY_RESIZE: {
	handleResize(event);
	break;
	}
	case ALLEGRO_EVENT_DISPLAY_CLOSE: {
	throw ShutdownException();
	break;
	}
	case ALLEGRO_EVENT_KEY_UP: {
	handleKeyUp(keyboard, event);
	break;
	}
	case ALLEGRO_EVENT_KEY_CHAR : {
	// Global::debug(0) << "Key char " << event.keyboard.keycode << " unicode " << event.keyboard.unichar << std::endl;
	bool ok = true;
	if (event.keyboard.repeat){
	ok = Keyboard::getRepeatState();
	}
	if (ok){
	handleKeyDown(keyboard, event);
	}
	break;
	}
	case ALLEGRO_EVENT_JOYSTICK_CONFIGURATION: {
	/* FIXME: tell input manager to reconfigure joysticks */
	// al_reconfigure_joysticks();
	break;
	}
	}
	}

	/*
	if (joystick){
	joystick->poll();
	}
	SDL_Event event;
	while (SDL_PollEvent(&event) == 1){
	switch (event.type){
	case SDL_QUIT : {
	dispatch(CloseWindow);
	break;
	}
	case SDL_KEYDOWN : {
	handleKeyDown(keyboard, event);
	// dispatch(Key, event.key.keysym.sym);
	break;
	}
	case SDL_KEYUP : {
	handleKeyUp(keyboard, event);
	break;
	}
	case SDL_JOYBUTTONDOWN: {
	if (joystick != NULL){
	handleJoystickButtonDown(joystick, event);
	}
	break;
	}
	case SDL_JOYHATMOTION : {
	if (joystick != NULL){
	handleJoystickHat(joystick, event);
	}
	break;
	}
	case SDL_JOYBUTTONUP: {
	if (joystick != NULL){
	handleJoystickButtonUp(joystick, event);
	}
	break;
	}
	case SDL_JOYAXISMOTION: {
	if (joystick != NULL){
	handleJoystickAxis(joystick, event);
	}
	break;
	}
	case SDL_VIDEORESIZE : {
	int width = event.resize.w;
	int height = event.resize.h;
	/ * to keep the perspective correct
	* 640/480 = 1.33333
	* /
	if (width > height){
	height = (int)((double) width / 1.3333333333);
	} else {
	width = (int)((double) height * 1.3333333333);
	}
	dispatch(ResizeScreen, width, height);
	break;
	}
	default : {
	break;
	}
	}
	}
	*/
	}
	#endif

	void EventManager::run(Keyboard & keyboard, std::map<int, ReferenceCount<Joystick> > joysticks){
	#ifdef USE_SDL
	runSDL(keyboard, joysticks);
	#elif USE_ALLEGRO
	runAllegro(keyboard, joysticks);
	#elif USE_ALLEGRO5
	runAllegro5(keyboard, joysticks);
	#endif
	}

	/* kill the program if the user requests */
	void EventManager::waitForThread(WaitThread & thread){
	// Keyboard dummy;
	while (!thread.isRunning()){
	try{
	/* input manager will run the event manager */
	InputManager::poll();
	// run(dummy);
	} catch (const ShutdownException & death){
	thread.kill();
	throw death;
	}
	Util::rest(10);
	}
	}

	EventManager::~EventManager(){
	#ifdef USE_ALLEGRO5
	al_destroy_event_queue(queue);
	#endif
	}

	void EventManager::enableKeyBuffer(){
	bufferKeys = true;
	}

	void EventManager::disableKeyBuffer(){
	bufferKeys = false;
	}

	void EventManager::dispatch(Event type, int arg1){
	switch (type){
	case Key : {
	if (bufferKeys){
	keys.push_back(KeyType(arg1));
	}
	break;
	}
	default : {
	break;
	}
	}
	}

	void EventManager::dispatch(Event type, int arg1, int arg2){
	switch (type){
	case ResizeScreen : {
	if (deferResize){
	resize.type = ResizeScreen;
	resize.width = arg1;
	resize.height = arg2;
	resize.enable = true;
	} else {
	Global::debug(1) << "Resizing screen to " << arg1 << ", " << arg2 << std::endl;
	if (Graphics::setGraphicsMode(0, arg1, arg2) == 0){
	Configuration::setScreenWidth(arg1);
	Configuration::setScreenHeight(arg2);
	}
	}
	break;
	}
	default: break;
	}
	}

	void EventManager::dispatch(Event type){
	switch (type){
	case CloseWindow : {
	throw ShutdownException();
	}
	default : break;
	}
	}

	void EventManager::deferResizeEvents(bool defer){
	deferResize = defer;
	if (!deferResize && resize.enable){
	dispatch(resize.type, resize.width, resize.height);
	resize.enable = false;
	}
	}

	class LoopDone: public std::exception {
	public:
	LoopDone(){
	}

	~LoopDone() throw () {
	}
	};

	Logic::~Logic(){
	}

	Draw::Draw():
	frames(0),
	second_counter(Global::second_counter),
	fps(0){
	}

	void Draw::drawFirst(const Graphics::Bitmap & screen){
	draw(screen);
	}

	Draw::~Draw(){
	}

	double Draw::getFps() const {
	return fps;
	}

	void Draw::updateFrames(){
	if (second_counter != Global::second_counter){
	int difference = Global::second_counter - second_counter;
	double alpha = 0.2;
	/* unlikely, but just in case */
	if (difference == 0){
	difference = 1;
	}
	fps = (alpha * fps) + ((1 - alpha) * (double) frames / difference);
	// fps[fps_index] = (double) frames / (double) difference;
	// fps_index = (fps_index+1) % max_fps_index;
	second_counter = Global::second_counter;
	frames = 0;
	}

	frames += 1;
	}

	static void changeScreenMode(){
	Configuration::setFullscreen(!Configuration::getFullscreen());
	int gfx = (Configuration::getFullscreen() ? Global::FULLSCREEN : Global::WINDOWED);
	Graphics::changeGraphicsMode(gfx, Graphics::Bitmap::getScreenWidth(), Graphics::Bitmap::getScreenHeight());
	}

	static void checkFullscreen(){
	InputMap<int> input;
	input.set(Keyboard::Key_F11, 0, true, 5);
	std::vector<InputMap<int>::InputEvent> events = InputManager::getEvents(input, InputSource(true));

	for (std::vector<InputMap<int>::InputEvent>::iterator it = events.begin(); it != events.end(); it++){
	InputMap<int>::InputEvent event = *it;

	if (!event.enabled){
	continue;
	}

	if (event.out == 5){
	changeScreenMode();
	}
	}
	}

	static void doStandardLoop(Logic & logic, Draw & draw){
	if (Graphics::screenParameter.current() == NULL){
	throw Exception::Base(__FILE__, __LINE__);
	}
	const Graphics::Bitmap & screen = *Graphics::screenParameter.current();
	screen.clear();
	draw.drawFirst(screen.aspectRatio(640, 480));
	screen.BlitToScreen();
	Global::speed_counter4 = 0;
	double runCounter = 0;
	try{
	const int maxCount = 20;
	int frameCount = 0;
	uint64_t frameTime = 0;
	int logicCount = 0;
	uint64_t logicTime = 0;
	while (!logic.done()){
	if (Global::speed_counter4 > 0){
	// Global::debug(0) << "Speed counter " << Global::speed_counter4 << std::endl;
	runCounter += logic.ticks(Global::speed_counter4);
	Global::speed_counter4 = 0;
	bool need_draw = false;
	while (runCounter >= 1.0){
	need_draw = true;
	InputManager::poll();
	checkFullscreen();
	runCounter -= 1;
	logicCount += 1;
	uint64_t now = System::currentMilliseconds();
	logic.run();
	uint64_t later = System::currentMilliseconds();
	logicTime += (later - now);

	if (logicCount >= maxCount){
	// Global::debug(0) << "Logic average " << (logicTime / logicCount) << "ms" << std::endl;
	logicCount = 0;
	logicTime = 0;
	}

	if (shutdown()){
	throw ShutdownException();
	}

	if (logic.done()){
	/* quit the loop immediately */
	throw LoopDone();
	}
	}

	if (need_draw){
	frameCount += 1;
	draw.updateFrames();
	uint64_t now = System::currentMilliseconds();
	screen.clear();
	draw.draw(screen.aspectRatio(640, 480));
	screen.BlitToScreen();
	uint64_t later = System::currentMilliseconds();
	frameTime += (later - now);

	if (frameCount >= maxCount){
	// Global::debug(0) << "Draw average " << (frameTime / frameCount) << "ms" << std::endl;
	frameCount = 0;
	frameTime = 0;
	}
	}
	}

	while (Global::speed_counter4 == 0){
	/* if the fps is limited then don't keep redrawing */
	if (Global::rateLimit){
	rest(1);
	} else {
	draw.updateFrames();
	screen.clear();
	draw.draw(screen.aspectRatio(640, 480));
	screen.BlitToScreen();
	}
	}
	}
	} catch (const LoopDone & done){
	}
	}

	void standardLoop(Logic & logic, Draw & draw){
	/* if a screen already exists (because we have nested standardLoops) then
	* leave this parameter alone, otherwise set a new parameter.
	*/
	/*
	if (Parameter<Graphics::Bitmap*>::current() == NULL){
	doStandardLoop(logic, draw);
	} else {
	doStandardLoop(logic, draw);
	}
	*/
	doStandardLoop(logic, draw);
	}

	}

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