loading.cpp
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loading.cpp
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	#include "bitmap.h"
	#include "trans-bitmap.h"
	#include <math.h>
	#include <iostream>

	/* FIXME: get rid of this dependancy */
	#include "paintown-engine/level/utils.h"

	#include "messages.h"
	#include "loading.h"
	#include "file-system.h"
	#include "font.h"
	#include "funcs.h"
	#include "gradient.h"
	#include "parameter.h"
	#include "thread.h"
	#include "globals.h"
	#include <vector>
	#include "thread.h"
	#include "message-queue.h"
	#include "init.h"
	#include "events.h"

	using namespace std;

	namespace Loader{

	volatile bool done_loading = true;

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

	class Info{
	public:
	Info(){
	Global::registerInfo(&messages);
	}

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

	~Info(){
	Global::unregisterInfo(&messages);
	}

	private:
	MessageQueue messages;
	};

	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){
	Font::getDefaultFont().printf( 400, 480 - Font::getDefaultFont().getHeight() * 5 / 2 - Font::getDefaultFont().getHeight(), Graphics::makeColor( 192, 192, 192 ), background, "Paintown version %s", 0, Global::getVersionString().c_str());
	Font::getDefaultFont().printf( 400, 480 - Font::getDefaultFont().getHeight() * 5 / 2, Graphics::makeColor( 192, 192, 192 ), background, "Made by Jon Rafkind", 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;
	};

	static void loadingScreen1(LoadingContext & context, const Level::LevelInfo & levelInfo){
	int load_x = 80;
	int load_y = 220;
	const int infobox_width = 300;
	const int infobox_height = 150;
	const Font & myFont = Font::getFont(Global::DEFAULT_FONT, 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){
	}

	LoadingContext & context;
	State & state;
	Effects::Gradient & gradient;
	Info info;
	Messages & infobox;

	void run(){
	gradient.backward();
	state.drawInfo = info.transferMessages(infobox) \|\| state.drawInfo;
	}

	double ticks(double system){
	return system;
	}

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

	class Draw: public Util::Draw {
	public:
	Draw(const Level::LevelInfo & 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),
	infoWork(Graphics::screenParameter.current(), load_x, load_y + load_height 2, infobox_width, infobox_height),
	infoBackground(infobox_width, infobox_height),
	infobox_x(load_x),
	infobox_y(load_y + load_height * 2),
	load_x(load_x),
	load_y(load_y),
	load_width(load_width),
	load_height(load_height){

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

	const Level::LevelInfo & levelInfo;
	Effects::Gradient & gradient;
	State & state;
	Messages & infobox;
	Graphics::Bitmap infoWork;
	Graphics::Bitmap infoBackground;
	vector<ppair> pairs;
	const int infobox_x;
	const int infobox_y;
	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() != 0){
	setupBackground(*levelInfo.getBackground(), load_x, load_y, load_width, load_height, infobox_x, infobox_y, infoBackground.getWidth(), infoBackground.getHeight(), infoBackground, screen);
	} else {
	setupBackground(Graphics::Bitmap(levelInfo.loadingBackground().path()), load_x, load_y, load_width, load_height, infobox_x, infobox_y, infoBackground.getWidth(), infoBackground.getHeight(), infoBackground, screen);
	}
	}

	void draw(const Graphics::Bitmap & 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::getFont(Global::DEFAULT_FONT, 24, 24);
	/* cheesy hack to change the font size. the font
	* should store the size and change it on its own
	*/
	Font::getFont(Global::DEFAULT_FONT, 13, 13);
	infobox.draw(0, 0, infoWork, infoFont);
	Font::getFont(Global::DEFAULT_FONT, 24, 24);
	infoWork.BlitAreaToScreen(infobox_x, infobox_y);
	// infoWork.BlitToScreen();
	state.drawInfo = false;
	}
	/* 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 Level::LevelInfo & 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 / 2;
	}

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

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

	class Draw: public Util::Draw {
	public:
	Draw(int & angle, const int speed):
	original(40, 40),
	angle(angle),
	speed(speed){
	original.BlitFromScreen(0, 0);

	color1 = Graphics::makeColor(0, 0, 0);
	color2 = Graphics::makeColor(0x00, 0x99, 0xff);
	color3 = Graphics::makeColor(0xff, 0x22, 0x33);
	color4 = Graphics::makeColor(0x44, 0x77, 0x33);
	colors[0] = color1;
	colors[1] = color2;
	colors[2] = color3;
	colors[3] = color4;
	Graphics::Bitmap::transBlender(0, 0, 0, 64);
	}

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

	Graphics::Color color1;
	Graphics::Color color2;
	Graphics::Color color3;
	Graphics::Color color4;
	/* the length of this array is the number of circles to show */
	Graphics::Color colors[4];

	~Draw(){
	}

	void draw(const Graphics::Bitmap & screen){
	Graphics::Bitmap work(screen, 0, 0, 40, 40);
	int max = sizeof(colors) / sizeof(int);
	double middleX = work.getWidth() / 2;
	double middleY = work.getHeight() / 2;
	original.Blit(work);
	for (int i = 0; i < max; i++){
	double x = cos(Util::radians(angle + 360 / max * i)) * 15;
	double y = sin(Util::radians(angle + 360 / max * i)) * 15;
	/* ghost circle */
	work.translucent().circleFill(middleX + x, middleY + y, 2, colors[i]);
	x = cos(Util::radians(angle + speed + 360 / max * i)) * 15;
	y = sin(Util::radians(angle + speed + 360 / max * i)) * 15;
	/* real circle */
	work.circleFill(middleX + x, middleY + y, 2, colors[i]);
	}
	work.BlitAreaToScreen(0, 0);
	}
	};

	int angle = 0;
	int speed = 7;
	Logic logic(context, angle, speed);
	Draw draw(angle, speed);
	Util::standardLoop(logic, draw);

	#if 0
	while (! context.done()){
	bool draw = false;

	if (Global::speed_counter > 0){
	double think = Global::speed_counter;
	Global::speed_counter = 0;
	draw = true;

	while (think > 0){
	angle += speed;
	think -= 1;
	}
	} else {
	Util::rest(1);
	}

	if (draw){
	int max = sizeof(colors) / sizeof(int);
	double middleX = work.getWidth() / 2;
	double middleY = work.getHeight() / 2;
	original.Blit(work);
	for (int i = 0; i < max; i++){
	double x = cos(Util::radians(angle + 360 / max * i)) * 15;
	double y = sin(Util::radians(angle + 360 / max * i)) * 15;
	/* ghost circle */
	work.translucent().circleFill(middleX + x, middleY + y, 2, colors[i]);
	x = cos(Util::radians(angle + speed + 360 / max * i)) * 15;
	y = sin(Util::radians(angle + speed + 360 / max * i)) * 15;
	/* real circle */
	work.circleFill(middleX + x, middleY + y, 2, colors[i]);
	}
	work.BlitAreaToScreen(0, 0);
	}
	}
	#endif
	}

	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 Level::LevelInfo & 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 {
	switch (kind){
	case Default: loadingScreen1(context, info); break;
	case SimpleCircle: loadingScreenSimpleX1(context, info); break;
	default: loadingScreen1(context, info); break;
	}

	Util::Thread::joinThread(loadingThread);
	}
	}

	}

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