loading.cpp
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loading.cpp
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	#include "graphics/bitmap.h"
	#include <math.h>
	#include <iostream>

	#include "messages.h"
	#include "loading.h"
	#include "file-system.h"
	#include "font.h"
	#include "funcs.h"
	#include "version.h"
	#include "graphics/gradient.h"
	#include "parameter.h"
	#include "thread.h"
	#include <vector>
	#include "thread.h"
	#include "message-queue.h"
	#include "init.h"
	#include "events.h"
	#include "input/input-map.h"
	#include "input/input-manager.h"

	using namespace std;

	namespace Loader{

	volatile bool done_loading = true;

	typedef struct pair{
	int x, y;
	} ppair;

	class MessageInfo{
	public:
	MessageInfo(){
	MessageQueue::registerInfo(&messages);
	}

	bool transferMessages(Messages & box){
	bool did = false;
	while (messages.hasAny()){
	const string & str = messages.get();
	box.addMessage(str);
	did = true;
	}
	return did;
	}

	~MessageInfo(){
	MessageQueue::unregisterInfo(&messages);
	}

	private:
	MessageQueue messages;
	};

	Info::Info(const string & message, const Filesystem::AbsolutePath & background):
	x(-1),
	y(-1),
	_loadingMessage(message),
	background(NULL),
	_loadingBackground(background){
	}

	Info::Info(const Info & info){
	this->x = info.x;
	this->y = info.y;
	this->_loadingMessage = info._loadingMessage;
	this->background = info.background;
	this->_loadingBackground = info._loadingBackground;
	}

	Info::~Info(){
	}

	void Info::setBackground(const Graphics::Bitmap * background){
	this->background = background;
	}

	void Info::setLoadingMessage(const std::string & str){
	this->_loadingMessage = str;
	}

	void Info::setPosition(int x, int y){
	this->x = x;
	this->y = y;
	}

	const Graphics::Bitmap * Info::getBackground() const {
	return background;
	}

	const string & Info::loadingMessage() const {
	return _loadingMessage;
	}

	const Filesystem::AbsolutePath & Info::loadingBackground() const {
	return _loadingBackground;
	}

	int Info::getPositionX() const {
	return x;
	}

	int Info::getPositionY() const {
	return y;
	}

	void * loadingScreenSimple1(void * arg);

	static void setupBackground(const Graphics::Bitmap & background, int load_x, int load_y, int load_width, int load_height, int infobox_x, int infobox_y, int infoWidth, int infoHeight, const Graphics::Bitmap & infoBackground, const Graphics::Bitmap & screen){
	int startX = background.getWidth() - Font::getDefaultFont().textLength("Paintown version 9.9.9.9");
	int startY = background.getHeight() - Font::getDefaultFont().getHeight() * 4;
	int height = Font::getDefaultFont().getHeight();

	Font::getDefaultFont().printf(startX, startY + height * 0, Graphics::makeColor(192, 192, 192), background, "Paintown version %s", 0, Version::getVersionString().c_str());
	Font::getDefaultFont().printf(startX, startY + height * 1, Graphics::makeColor(192, 192, 192), background, "Made by Jon Rafkind", 0);
	Font::getDefaultFont().printf(startX, startY + height * 2, Graphics::makeColor(192, 192, 192), background, "http://paintown.org", 0);

	/* we have to blit to the screen object passed in because that is the bitmap
	* that will be operated on in the draw() method of loadingScreen1.
	* we also have to blit to the real screen because the screen object
	* is not drawn in its entirety to the real screen, only the part
	* that shows the 'Loading ...' message and the info box.
	* drawing twice in Allegro5 is redundant because the screen object is the real
	* screen but for Allegro4 and SDL we need to do this because the screen object
	* is a buffer.
	*/
	background.Blit(screen);
	background.BlitToScreen();
	background.Blit(infobox_x, infobox_y, infoWidth, infoHeight, 0, 0, infoBackground);
	}

	/* converts a bitmap with some text on it into a sequence of points */
	static vector<ppair> generateFontPixels(const Font & myFont, const string & message, int width, int height){
	Graphics::Bitmap letters(width, height);
	letters.fill(Graphics::MaskColor());
	myFont.printf(0, 0, Graphics::makeColor(255, 255, 255), letters, message.c_str(), 0);

	vector<ppair> pairs;
	/* store every pixel we need to draw */
	letters.lock();
	for (int x = 0; x < letters.getWidth(); x++){
	for (int y = 0; y < letters.getHeight(); y++){
	Graphics::Color pixel = letters.getPixel(x, y);
	if (pixel != Graphics::MaskColor()){
	ppair p;
	p.x = x;
	p.y = y;
	pairs.push_back(p);
	}
	}
	}
	letters.unlock();

	// Graphics::resetDisplay();

	return pairs;
	}

	/* shows time elapsed */
	class TimeCounter{
	public:
	TimeCounter():
	work(200, 40){
	start = Global::second_counter;
	last = 0;
	}

	void draw(int x, int y){
	const Font & font = Font::getDefaultFont(24, 24);
	if (Global::second_counter != last){
	work.clear();
	last = Global::second_counter;
	font.printf(0, 0, Graphics::makeColor(192, 192, 192), work, "Waiting.. %d", 0, last - start);
	work.BlitAreaToScreen(x, y);
	}
	}

	Graphics::Bitmap work;
	unsigned int start;
	unsigned int last;
	};

	enum LoadingKeys{
	Activate
	};

	static void loadingScreen1(LoadingContext & context, const Info & levelInfo){
	int load_x = 80;
	int load_y = 220;
	const int infobox_width = 300;
	const int infobox_height = 150;
	const Font & myFont = Font::getDefaultFont(24, 24);

	if (levelInfo.getPositionX() != -1){
	load_x = levelInfo.getPositionX();
	}

	if (levelInfo.getPositionY() != -1){
	load_y = levelInfo.getPositionY();
	}

	// const char * the_string = (arg != NULL) ? (const char *) arg : "Loading...";
	int load_width = myFont.textLength(levelInfo.loadingMessage().c_str());
	int load_height = myFont.getHeight(levelInfo.loadingMessage().c_str());

	Global::debug(2) << "loading screen" << endl;

	Messages infobox(infobox_width, infobox_height);

	const int MAX_COLOR = 200;

	/* blend from dark grey to light red */
	Effects::Gradient gradient(MAX_COLOR, Graphics::makeColor(16, 16, 16), Graphics::makeColor(192, 8, 8));

	TimeCounter counter;

	struct State{
	bool drawInfo;
	};

	class Logic: public Util::Logic {
	public:
	Logic(LoadingContext & context, State & state, Effects::Gradient & gradient, Messages & infoBox):
	context(context),
	state(state),
	gradient(gradient),
	infobox(infoBox),
	active(false){
	input.set(Keyboard::Key_SPACE, 0, true, Activate);
	input.set(Keyboard::Key_ENTER, 0, true, Activate);
	input.set(Joystick::Button1, 0, true, Activate);
	}

	LoadingContext & context;
	State & state;
	Effects::Gradient & gradient;
	MessageInfo info;
	Messages & infobox;
	bool active;
	InputMap<LoadingKeys> input;

	void doInput(){
	class Handler: public InputHandler<LoadingKeys> {
	public:
	Handler(bool & active):
	active(active){
	}

	bool & active;

	void press(const LoadingKeys & out, Keyboard::unicode_t unicode){
	if (out == Activate){
	/* the info box can't really be turned off because once
	* its drawn it will remain there. the background would
	* have to be drawn on top of it to remove the old
	* info box. maybe do this in the future, if so use
	* active = ! active
	* to toggle it.
	*/
	active = ! active;
	}
	}

	void release(const LoadingKeys & out, Keyboard::unicode_t unicode){
	}
	};

	Handler handler(active);
	InputManager::handleEvents(input, InputSource(true), handler);
	}

	void run(){
	for (int i = 0; i < 3; i++){
	gradient.backward();
	}
	doInput();
	info.transferMessages(infobox);
	// state.drawInfo = active && (info.transferMessages(infobox) \|\| state.drawInfo);
	state.drawInfo = active;
	}

	double ticks(double system){
	return system * Global::ticksPerSecond(8);
	}

	bool done(){
	return context.done();
	}
	};

	class Draw: public Util::Draw {
	public:
	Draw(const Info & levelInfo, State & state, Messages & infobox, Effects::Gradient & gradient, int load_width, int load_height, int infobox_width, int infobox_height, int load_x, int load_y):
	levelInfo(levelInfo),
	gradient(gradient),
	state(state),
	infobox(infobox),
	infobox_x(load_x),
	infobox_y(load_y + load_height * 2),
	infobox_width(infobox_width),
	infobox_height(infobox_height),
	load_x(load_x),
	load_y(load_y),
	load_width(load_width),
	load_height(load_height){

	if (levelInfo.loadingBackground() != Filesystem::AbsolutePath("")){
	background = Graphics::Bitmap(levelInfo.loadingBackground().path());
	}

	const Font & myFont = Font::getDefaultFont(24, 24);
	pairs = generateFontPixels(myFont, levelInfo.loadingMessage(), load_width, load_height);
	}

	const Info & levelInfo;
	Effects::Gradient & gradient;
	State & state;
	Messages & infobox;
	Graphics::Bitmap background;
	// Graphics::Bitmap infoWork;
	// Graphics::Bitmap infoBackground;
	vector<ppair> pairs;
	const int infobox_x;
	const int infobox_y;
	const int infobox_width;
	const int infobox_height;
	const int load_x;
	const int load_y;
	const int load_width;
	const int load_height;

	/*
	void drawFirst(const Graphics::Bitmap & screen){
	if (levelInfo.getBackground() != NULL){
	setupBackground(*levelInfo.getBackground(), load_x, load_y, load_width, load_height, infobox_x, infobox_y, infoBackground.getWidth(), infoBackground.getHeight(), infoBackground, screen);
	} else {
	Graphics::Bitmap background;
	if (levelInfo.loadingBackground() != Filesystem::AbsolutePath("")){
	background = Graphics::Bitmap(levelInfo.loadingBackground().path());
	} else {
	background = Graphics::Bitmap(*Graphics::screenParameter.current(), true);
	}
	setupBackground(background, load_x, load_y, load_width, load_height, infobox_x, infobox_y, infoBackground.getWidth(), infoBackground.getHeight(), infoBackground, screen);
	}
	}
	*/

	void drawAuthorInfo(const Graphics::Bitmap & screen){
	int startX = screen.getWidth() - Font::getDefaultFont().textLength("Paintown version 9.9.9.9");
	int startY = screen.getHeight() - Font::getDefaultFont().getHeight() * 4;
	int height = Font::getDefaultFont().getHeight();

	Font::getDefaultFont().printf(startX, startY + height * 0, Graphics::makeColor(192, 192, 192), screen, "Paintown version %s", 0, Version::getVersionString().c_str());
	Font::getDefaultFont().printf(startX, startY + height * 1, Graphics::makeColor(192, 192, 192), screen, "Made by Jon Rafkind", 0);
	Font::getDefaultFont().printf(startX, startY + height * 2, Graphics::makeColor(192, 192, 192), screen, "http://paintown.org", 0);
	}

	void draw(const Graphics::Bitmap & screen){
	if (!background.isEmpty()){
	background.drawStretched(screen);
	}
	Graphics::Bitmap work(screen, load_x, load_y, load_width, load_height);
	// work.lock();
	for (vector< ppair >::iterator it = pairs.begin(); it != pairs.end(); it++){
	Graphics::Color color = gradient.current(it->x);
	work.putPixel(it->x, it->y, color);
	}
	// work.unlock();

	if (state.drawInfo){
	// infoBackground.Blit(infoWork);

	const Font & infoFont = Font::getDefaultFont(24, 24);
	/* cheesy hack to change the font size. the font
	* should store the size and change it on its own
	*/
	Graphics::Bitmap infoWork(screen, infobox_x, infobox_y, infobox_width, infobox_height);
	Font::getDefaultFont(13, 13);
	infobox.draw(0, 0, infoWork, infoFont);
	Font::getDefaultFont(24, 24);
	infoWork.BlitAreaToScreen(infobox_x, infobox_y);
	// infoWork.BlitToScreen();
	// state.drawInfo = false;
	}

	drawAuthorInfo(screen);
	/* work already contains the correct background */
	// work.Blit( load_x, load_y, *Bitmap::Screen );
	// work.BlitToScreen();
	// work.BlitAreaToScreen(load_x, load_y);
	}
	};

	State state;
	// state.drawInfo = true;
	Logic logic(context, state, gradient, infobox);
	Draw draw(levelInfo, state, infobox, gradient, load_width, load_height, infobox_width, infobox_height, load_x, load_y);

	Util::standardLoop(logic, draw);
	}

	static void loadingScreenSimpleX1(LoadingContext & context, const Info & levelInfo){
	class Logic: public Util::Logic {
	public:
	Logic(LoadingContext & context, int & angle, int speed):
	context(context),
	speed(speed),
	angle(angle){
	}

	LoadingContext & context;
	/* speed of rotation */
	const int speed;
	int & angle;

	double ticks(double system){
	return system * Global::ticksPerSecond(10);
	}

	bool done(){
	return context.done();
	}

	void run(){
	angle += speed * 2;
	angle = angle % 360;
	}
	};

	class Draw: public Util::Draw {
	public:
	Draw(int & angle, const int speed):
	angle(angle),
	speed(speed){
	/*
	if (levelInfo.loadingBackground() != Filesystem::AbsolutePath("")){
	background = Graphics::Bitmap(levelInfo.loadingBackground().path());
	}
	*/

	colors[0] = Graphics::makeColor(0x18, 0x52, 0xa0);
	colors[1] = Graphics::makeColor(0x00, 0x99, 0xff);
	colors[2] = Graphics::makeColor(0xff, 0x22, 0x33);
	colors[3] = Graphics::makeColor(0x44, 0x77, 0x33);
	Graphics::Bitmap::transBlender(0, 0, 0, 64);
	}

	Graphics::Bitmap background;
	int & angle;
	const int speed;

	/* the length of this array is the number of circles to show */
	Graphics::Color colors[4];

	virtual ~Draw(){
	}

	void draw(const Graphics::Bitmap & screen){
	if (!background.isEmpty()){
	background.drawStretched(screen);
	}

	Graphics::Bitmap work(screen, 0, 0, 40, 40);
	int max = Util::array_size(colors);
	double middleX = work.getWidth() / 2;
	double middleY = work.getHeight() / 2;
	int size = 15;
	int radius = 3;
	for (int i = 0; i < max; i++){
	double new_angle = angle + 360.0 / (double) max * i;
	int lag = 17;
	double x = cos(Util::radians(new_angle - lag)) * size;
	double y = sin(Util::radians(new_angle - lag)) * size;
	/* ghost circle */
	work.translucent(0, 0, 0, 128).circleFill(middleX + x, middleY + y, radius, colors[i]);
	x = cos(Util::radians(new_angle)) * size;
	y = sin(Util::radians(new_angle)) * size;
	/* real circle */
	work.circleFill(middleX + x, middleY + y, radius, colors[i]);
	}
	// work.BlitAreaToScreen(0, 0);
	}
	};

	int angle = 0;
	int speed = 10;
	Logic logic(context, angle, speed);
	Draw draw(angle, speed);
	Util::standardLoop(logic, draw);
	}

	LoadingContext::LoadingContext():
	finished(false){
	Util::Thread::initializeLock(&lock);
	}

	LoadingContext::~LoadingContext(){
	}

	void LoadingContext::doLoad(){
	this->load();
	Util::Thread::acquireLock(&lock);
	finished = true;
	Util::Thread::releaseLock(&lock);
	}

	bool LoadingContext::done(){
	bool ok = false;
	Util::Thread::acquireLock(&lock);
	ok = this->finished;
	Util::Thread::releaseLock(&lock);
	return ok;
	}

	void * LoadingContext::load_it(void * arg){
	LoadingContext * context = (LoadingContext*) arg;
	context->doLoad();
	return NULL;
	}

	static void showLoadMessage(){
	int screenX = 80;
	int screenY = 50;
	Graphics::Bitmap work(110, 50);
	work.BlitFromScreen(screenX, screenY);
	Graphics::Bitmap top(110, 50);
	top.fill(Graphics::makeColor(0, 0, 0));
	Font::getDefaultFont(25, 25).printf(10, 5, Graphics::makeColor(192, 192, 192), top, "Loading", 0);
	Graphics::Bitmap::transBlender(0, 0, 0, 200);
	top.translucent().draw(0, 0, work);
	work.BlitAreaToScreen(screenX, screenY);
	}

	void loadScreen(LoadingContext & context, const Info & info, Kind kind){
	Util::Thread::Id loadingThread;
	bool created = Util::Thread::createThread(&loadingThread, NULL, (Util::Thread::ThreadFunction) LoadingContext::load_it, &context);
	if (!created){
	Global::debug(0) << "Could not create loading thread. Loading will occur in the main thread" << endl;
	showLoadMessage();
	LoadingContext::load_it(&context);
	// throw LoadException(__FILE__, __LINE__, "Could not create loader thread");
	} else {
	InputManager::deferResizeEvents(true);
	switch (kind){
	case Default: loadingScreen1(context, info); break;
	case SimpleCircle: loadingScreenSimpleX1(context, info); break;
	default: loadingScreen1(context, info); break;
	}

	Util::Thread::joinThread(loadingThread);
	InputManager::deferResizeEvents(false);
	}
	}

	}

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