Añadidas las unidades para trabajar con paletas

on_screen_keyboard: Compatibilidad con fuentes de texto de tamaño variable

data/nokia.txt

@@ -0,0 +1,194 @@
+# box width
+8
+# box height
+8
+# 32 espacio ( )
+4
+# 33 !
+2
+# 34 "
+3
+# 35 #
+5
+# 36 $
+5
+# 37 %
+6
+# 38 &
+6
+# 39 '
+1
+# 40 (
+3
+# 41 )
+3
+# 42 *
+5         
+# 43 +
+5
+# 44 ,
+2
+# 45 -
+4
+# 46 .
+2
+# 47 /
+3
+# 48 0
+5
+# 49 1
+3
+# 50 2
+5
+# 51 3
+5
+# 52 4
+5
+# 53 5
+5
+# 54 6
+5
+# 55 7
+5
+# 56 8
+5
+# 57 9
+5
+# 58 :
+2
+# 59 ;
+2
+# 60 <
+4
+# 61 =
+4
+# 62 >
+4
+# 63 ?
+5
+# 64 @
+6
+# 65 A
+5
+# 66 B
+5
+# 67 C
+5
+# 68 D
+5
+# 69 E
+5
+# 70 F
+5
+# 71 G
+5
+# 72 H
+5
+# 73 I
+2
+# 74 J
+4
+# 75 K
+6
+# 76 L
+4
+# 77 M
+7
+# 78 N
+6
+# 79 O
+6
+# 80 P
+5
+# 81 Q
+6
+# 82 R
+5
+# 83 S
+4
+# 84 T
+6
+# 85 U
+5
+# 86 V
+6
+# 87 W
+7
+# 88 X
+6
+# 89 Y
+6
+# 90 Z
+5
+# 91 [
+2
+# 92 \
+3
+# 93 ]
+2
+# 94 ^
+3
+# 95 _
+6
+# 96 `
+2
+# 97 a
+5
+# 98 b
+5
+# 99 c
+4
+# 100 d
+5
+# 101 e
+5
+# 102 f
+3
+# 103 g
+5
+# 104 h
+5
+# 105 i
+2
+# 106 j
+3
+# 107 k
+5
+# 108 l
+2
+# 109 m
+8
+# 110 n
+5
+# 111 o
+5
+# 112 p
+5
+# 113 q
+5
+# 114 r
+4
+# 115 s
+4
+# 116 t
+3
+# 117 u
+5
+# 118 v
+5
+# 119 w
+7
+# 120 x
+5
+# 121 y
+5
+# 122 z
+5
+# 123 { -> ñ
+5
+# 124 | -> ç
+5
+# 125 }
+0
+# 126 ~
+0

main.cpp

@@ -15,37 +15,160 @@ Código fuente creado por JailDesigner
 #include "units/texture.h"
 #include "units/screen.h"
 #include "units/input.h"
+#include "units/on_screen_keyboard.h"
+#include "quickcg.h"
 
+using namespace QuickCG;
+using namespace std;
+
+// Punteros
 SDL_Event *event;
 SDL_Window *window;
 SDL_Renderer *renderer;
-Uint32 ticks = 0;
+Asset *asset;
-Uint32 ticksSpeed = 15;
+JA_Music_t *music;
-int counter = 0;
+JA_Sound_t *sound;
+Input *input;
+struct options_t *options;
+Screen *screen;
+Text *text;
+Text *debugText;
+Texture *texture;
+MovingSprite *sprite;
+OnScreenKeyboard *osk = nullptr;
+
+// Variables de uso general
+Uint32 ticks = 0;			  // Variable para la frecuencia de actualización de la lógica del programa
+const Uint32 ticksSpeed = 15; // Variable para la frecuencia de actualización de la lógica del programa
+bool should_exit = false;	  // Variable para saber si ha terminado el progra,a
+int counter = 0;			  // Contador para lo que se necesite
+string controllerName;		  // Nombre del primer mando detectado
+string inputPressed;		  // Texto con el último input que se ha pulsado
+int fx = 0;					  // Efecto seleccionado para el fondo
+// 0 - Degradado
+// 1 - Fuego
+int fxTotal = 2; // Cantidad total de efectos disponibles para el fondo
+
+// Variables para el efecto del degradado
 int gradColorMin = 64;		 // Minimo color más alto del degradado
 int gradColorMax = 192;		 // Minimo color más alto del degradado
 int gradCurrentColor = 192;	 // Color actual más alto del degradado
 int gradBreathDirection = 0; // Indica si gradCurrentColor crece o decrece
 
-int main(int argc, char *argv[])
+// Variables para el efecto de fuego
+const int fireDesp = 3;											// Desplazamiento inferior del efecto de fuego para eliminar las primeras filas
+const int fireWidth = 320;										// Ancho del efecto de fuego
+const int fireHeight = 240 + fireDesp;							// Alto del efecto de fuego
+Uint8 fire[fireHeight][fireWidth];								// Buffer con el fuego
+Uint32 palette[256];											// Paleta de color para el fuego
+int fireModifier = 28;											// Valor para modificar el efecto de fuego (0-30)
+SDL_Texture *fireTexture;										// Textura donde pintar los pixels del fuego
+Uint32 *fireBuffer;												// Ubiación donde se guardan los pixeles del fuego
+int pitch;														// No se utiliza pero se necesita para dibujar los pixeles en la textura
+SDL_Rect fireSource = {0, 0, fireWidth, fireHeight - fireDesp}; // Parte de la textura donde está el efecto de fuego que se copiará a la pantalla
+
+// Inicializa las opciones
+void initOptions();
+
+// Inicializa la lista de recursos
+void initAsset(char *argv[]);
+
+// Inicializa SDL
+void initSDL();
+
+// Inicializa la ventana
+void initWindow();
+
+// Inicializa el gestor de eventos
+void initEvent();
+
+// Inicializa jail_audio
+void initJailAudio();
+
+// Inicializa el objeto screen
+void initScreen();
+
+// Inicializa el objeto input
+void initInput();
+
+// Inicializa el texto
+void initText();
+
+// Inicializa el teclado en pantalla
+void initOnScreenKeyboard();
+
+// Inicializa el sprite
+void initSprite();
+
+// Inicializa el efecto de fuego
+void initFire();
+
+// Inicializa todo
+void initAll(char *argv[]);
+
+// Comprueba el teclado y los eventos
+void checkEvents();
+
+// Comprueba el objeto input
+void checkInput();
+
+// Actualiza el sprite
+void updateSprite();
+
+// Actualiza el efecto de degradado
+void updateGradient();
+
+// Actualiza el efecto de fuego
+void updateFire();
+
+// Actualiza el efecto de fondo
+void updateFX();
+
+// Actualiza la lógica del programa
+void update();
+
+// Dibuja un degradado de fondo
+void renderGradient();
+
+// Dibuja el efecto de fuego
+void renderFire();
+
+// Dibuja el efecto de fondo
+void renderFX();
+
+// Dibuja el texto
+void renderText();
+
+// Dibuja los elementos del programa en pantalla
+void render();
+
+// Libera la memoria reservada
+void freeAll();
+
+// Inicializa las opciones
+void initOptions()
 {
-	// Inicializa las opciones
+	options = new options_t;
-	struct options_t *options = new options_t;
 	initOptions(options);
 	options->screen.nativeWidth = 320;
 	options->screen.nativeHeight = 240;
 	options->screen.nativeZoom = 2;
 	options->screen.windowZoom = 1;
 	options->console = true;
+}
 
-	// Inicializa la lista de recursos
+// Inicializa la lista de recursos
-	Asset *asset = new Asset(argv[0]);
+void initAsset(char *argv[])
+{
+	asset = new Asset(argv[0]);
 	asset->add("/data/music.ogg", t_music);
 	asset->add("/data/sound.wav", t_sound);
 	asset->add("/data/smb2.txt", t_font);
 	asset->add("/data/smb2.png", t_bitmap);
 	asset->add("/data/debug.txt", t_font);
 	asset->add("/data/debug.png", t_bitmap);
+	asset->add("/data/nokia.txt", t_font);
+	asset->add("/data/nokia.png", t_bitmap);
 	asset->add("/data/z80.png", t_bitmap);
 	asset->add("/data/notify.png", t_bitmap);
 	asset->add("/data/notify.wav", t_sound);
@@ -55,11 +178,18 @@ int main(int argc, char *argv[])
 	{
 		exit(EXIT_FAILURE);
 	}
+}
 
-	// Inicializa SDL y la ventana
+// Inicializa SDL
+void initSDL()
+{
 	SDL_Init(SDL_INIT_EVERYTHING);
-	window = SDL_CreateWindow("jail_engine_demo", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, options->screen.nativeWidth * options->screen.nativeZoom * options->screen.windowZoom, options->screen.nativeHeight * options->screen.nativeZoom * options->screen.windowZoom, SDL_WINDOW_SHOWN);
+}
-	// window = SDL_CreateWindow("jail_engine_demo", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 320, 240, SDL_WINDOW_SHOWN);
+
+// Inicializa la ventana
+void initWindow()
+{
+	window = SDL_CreateWindow("Jail Engine DEMO", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, options->screen.nativeWidth * options->screen.nativeZoom * options->screen.windowZoom, options->screen.nativeHeight * options->screen.nativeZoom * options->screen.windowZoom, SDL_WINDOW_SHOWN);
 	if (window != nullptr)
 	{
 		renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
@@ -76,46 +206,82 @@ int main(int argc, char *argv[])
 	{
 		exit(EXIT_FAILURE);
 	}
-	event = new SDL_Event();
+}
 
-	// Inicializa jail_audio
+// Inicializa el gestor de eventos
+void initEvent()
+{
+	event = new SDL_Event();
+}
+
+// Inicializa jail_audio
+void initJailAudio()
+{
 	JA_Init(48000, AUDIO_S16, 2);
-	JA_Music_t *music;
-	JA_Sound_t *sound;
 	music = JA_LoadMusic(asset->get("music.ogg").c_str());
 	sound = JA_LoadSound(asset->get("sound.wav").c_str());
+	// JA_PlayMusic(music, true);
+}
 
-	// Inicializa el objeto screen
+// Inicializa el objeto screen
-	Screen *screen = new Screen(window, renderer, options);
+void initScreen()
+{
+	screen = new Screen(window, renderer, options);
 	screen->addNotifier(asset->get("notify.png"), asset->get("smb2.png"), asset->get("smb2.txt"), asset->get("notify.wav"));
+}
 
-	// Inicializa el objeto input
+// Inicializa el objeto input
-	Input *input = new Input(asset->get("gamecontrollerdb.txt"));
+void initInput()
-	input->setVerbose(options->console);
+{
-	input->discoverGameController();
+	input = new Input(asset->get("gamecontrollerdb.txt"), options->console);
-	//input->bindKey(INPUT_UP, SDL_SCANCODE_UP);
+	controllerName = input->getNumControllers() > 0 ? input->getControllerName(0) : "No se ha encontrado ningun mando";
-	//input->bindKey(INPUT_DOWN, SDL_SCANCODE_DOWN);
+}
-	//input->bindKey(INPUT_LEFT, SDL_SCANCODE_LEFT);
+
-	//input->bindKey(INPUT_RIGHT, SDL_SCANCODE_RIGHT);
+// Inicializa el texto
-	//input->bindGameControllerButton(INPUT_UP, SDL_CONTROLLER_BUTTON_DPAD_UP);
+void initText()
-	//input->bindGameControllerButton(INPUT_DOWN, SDL_CONTROLLER_BUTTON_DPAD_DOWN);
+{
-	//input->bindGameControllerButton(INPUT_LEFT, SDL_CONTROLLER_BUTTON_DPAD_LEFT);
+	text = new Text(asset->get("smb2.txt"), asset->get("smb2.png"), renderer);
-	//input->bindGameControllerButton(INPUT_RIGHT, SDL_CONTROLLER_BUTTON_DPAD_RIGHT);
+	debugText = new Text(asset->get("debug.txt"), asset->get("debug.png"), renderer);
-	string controllerName = "";
+}
-	int numControllers = input->getNumControllers();
+
-	if (numControllers > 0)
+// Inicializa el teclado en pantalla
+void initOnScreenKeyboard()
+{
+	osk = new OnScreenKeyboard(renderer, input, asset->get("nokia.png"), asset->get("nokia.txt"), options, options->screen.nativeWidth - 30, options->screen.nativeHeight - 80, "JailDesigner");
+	osk->setBgColor({123, 99, 63});
+	osk->setCaption("JAILER_ID");
+	osk->setChars(USE_UPPER | USE_LOWER | USE_NUMBER);
+}
+
+// Elimina el teclado en pantalla
+void deleteOnScreenKeyboard()
+{
+	if (osk != nullptr)
 	{
-		// Obtiene el nombre del primer mando conectado
+		delete osk;
-		controllerName = input->getControllerName(0);
+		osk = nullptr;
 	}
+}
 
-	// Inicializa el texto
+// Dibuja el teclado en pantalla
-	Text *text = new Text(asset->get("smb2.txt"), asset->get("smb2.png"), renderer);
+void renderOnScreenKeyboard()
-	Text *debugText = new Text(asset->get("debug.txt"), asset->get("debug.png"), renderer);
+{
+	if (osk != nullptr)
+		osk->render();
+}
 
-	// Inicializa el sprite
+// Actualiza el teclado en pantalla
-	Texture *texture = new Texture(renderer, asset->get("z80.png"));
+void updateOnScreenKeyboard()
-	MovingSprite *sprite = new MovingSprite();
+{
+	if (osk != nullptr)
+		osk->update();
+}
+
+// Inicializa el sprite
+void initSprite()
+{
+	texture = new Texture(renderer, asset->get("z80.png"));
+	sprite = new MovingSprite();
 	sprite->setRenderer(renderer);
 	sprite->setTexture(texture);
 	sprite->setPosX(140);
@@ -125,200 +291,436 @@ int main(int argc, char *argv[])
 	sprite->setSpriteClip({0, 0, 16, 32});
 	sprite->setVelX(1);
 	sprite->setVelY(2);
+}
 
-	// Bucle principal
+// Inicializa el efecto de fuego
-	// JA_PlayMusic(music, true);
+void initFire()
-	bool should_exit = false;
+{
-	while (!should_exit)
+	// Inicializa el generador de numeros aleatorios
+	srand((unsigned)SDL_GetTicks());
+
+	// Inicializa el buffer de fuego
+	for (int y = 0; y < fireHeight; ++y)
+		for (int x = 0; x < fireWidth; ++x)
+			fire[y][x] = 0;
+
+	fireTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, fireWidth, fireHeight);
+
+	// Inicializa la paleta
+	for (int x = 0; x < 256; ++x)
 	{
+		// HSLtoRGB is used to generate colors:
+		// Hue goes from 0 to 85: red to yellow
+		// Saturation is always the maximum: 255
+		// Lightness is 0..255 for x=0..128, and 255 for x=128..255
+		ColorRGB color = HSLtoRGB(ColorHSL(x / 3, 255, min(255, x * 2)));
 
-		// Comprueba el teclado y los eventos
+		// Pon en la paleta el color calculado
-		while (SDL_PollEvent(event))
+		palette[x] = (Uint32)16777216 * 255 + 65536 * color.r + 256 * color.g + color.b;
+	}
+
+	// Coloca algo de fuego en la textura
+	for (int x = 0; x < 100; ++x)
+		updateFire();
+}
+
+// Inicializa todo
+void initAll(char *argv[])
+{
+	// Inicializa las opciones
+	initOptions();
+
+	// Inicializa la lista de recursos
+	initAsset(argv);
+
+	// Inicializa SDL
+	initSDL();
+
+	// Inicializa la ventana
+	initWindow();
+
+	// Inicializa el gestor de eventos
+	initEvent();
+
+	// Inicializa jail_audio
+	initJailAudio();
+
+	// Inicializa el objeto screen
+	initScreen();
+
+	// Inicializa el objeto input
+	initInput();
+
+	// Inicializa el texto
+	initText();
+
+	// Inicializa el teclado en pantalla
+	// initOnScreenKeyboard();
+
+	// Inicializa el sprite
+	initSprite();
+
+	// Inicializa el efecto de fuego
+	initFire();
+}
+
+// Comprueba el teclado y los eventos
+void checkEvents()
+{
+	while (SDL_PollEvent(event))
+	{
+		if (event->type == SDL_QUIT)
 		{
-			if (event->type == SDL_QUIT)
+			should_exit = true;
+			break;
+		}
+		if (event->type == SDL_KEYDOWN)
+		{
+			switch (event->key.keysym.scancode)
 			{
+			case SDL_SCANCODE_ESCAPE:
 				should_exit = true;
 				break;
-			}
-			if (event->type == SDL_KEYDOWN)
-			{
-				switch (event->key.keysym.scancode)
-				{
 
-				case SDL_SCANCODE_ESCAPE:
+			case SDL_SCANCODE_F1:
-					should_exit = true;
+				screen->decWindowSize();
-					break;
+				break;
 
-				case SDL_SCANCODE_1:
+			case SDL_SCANCODE_F2:
-					screen->decWindowSize();
+				screen->incWindowSize();
-					break;
+				break;
 
-				case SDL_SCANCODE_2:
+			case SDL_SCANCODE_F3:
-					screen->incWindowSize();
+				++fx %= fxTotal;
-					break;
+				break;
+			
+			case SDL_SCANCODE_F4:
+				--fireModifier;
+				fireModifier = max(0, fireModifier);
+				break;
 
-				case SDL_SCANCODE_N:
+			case SDL_SCANCODE_F5:
-					screen->showNotification("Ejemplo de notificacion", "con 2 lineas de texto", 0);
+				++fireModifier;
-					break;
+				fireModifier = min(30, fireModifier);
+				break;
 
-				default:
+			case SDL_SCANCODE_F6:
-					break;
+				screen->showNotification("Ejemplo de notificacion", "con 2 lineas de texto", 0);
-				}
+				break;
+
+			case SDL_SCANCODE_F7:
+				if (osk == nullptr)
+					initOnScreenKeyboard();
+				else
+					deleteOnScreenKeyboard();
+				break;
+			
+			case SDL_SCANCODE_F8:
+				break;
+
+			default:
+				break;
 			}
 		}
-		string inputPressed = "";
+	}
-		if (input->checkInput(INPUT_LEFT))
+}
+
+// Comprueba el objeto input
+void checkInput()
+{
+	inputPressed = "";
+	if (input->checkInput(INPUT_LEFT))
+	{
+		inputPressed = "Izquierda";
+	}
+	if (input->checkInput(INPUT_RIGHT))
+	{
+		inputPressed = "Derecha";
+	}
+	if (input->checkInput(INPUT_UP))
+	{
+		inputPressed = "Arriba";
+	}
+	if (input->checkInput(INPUT_DOWN))
+	{
+		inputPressed = "Abajo";
+	}
+}
+
+// Actualiza el sprite
+void updateSprite()
+{
+	if (sprite->getPosX() + sprite->getWidth() > options->screen.nativeWidth or sprite->getPosX() < 0)
+	{
+		sprite->undoMoveX();
+		int spr_direction = 1;
+		int spr_force = 1;
+		if (sprite->getVelX() > 0)
 		{
-			inputPressed = "LEFT";
+			spr_direction = -1;
 		}
-		if (input->checkInput(INPUT_RIGHT))
+		if (SDL_GetTicks() % 2 == 0)
 		{
-			inputPressed = "RIGHT";
+			spr_force = 2;
 		}
-		if (input->checkInput(INPUT_UP))
+		sprite->setVelX(spr_force * spr_direction);
-		{
+		JA_PlaySound(sound);
-			inputPressed = "UP";
-		}
-		if (input->checkInput(INPUT_DOWN))
-		{
-			inputPressed = "DOWN";
-		}
-
-		// Actualiza la lógica del programa
-		if (SDL_GetTicks() - ticks > ticksSpeed)
-		{
-			// Actualiza la variable
-			ticks = SDL_GetTicks();
-
-			// Incrementa el contador
-			counter++;
-
-			// Actualiza el objeto screen
-			screen->update();
-
-			// Actualiza el sprite
-			if (sprite->getPosX() + sprite->getWidth() > options->screen.nativeWidth or sprite->getPosX() < 0)
-			{
-				sprite->undoMoveX();
-				int spr_direction = 1;
-				int spr_force = 1;
-				if (sprite->getVelX() > 0)
-				{
-					spr_direction = -1;
-				}
-				if (SDL_GetTicks() % 2 == 0)
-				{
-					spr_force = 2;
-				}
-				sprite->setVelX(spr_force * spr_direction);
-				JA_PlaySound(sound);
-			}
-			if (sprite->getPosY() + sprite->getHeight() > options->screen.nativeHeight or sprite->getPosY() < 0)
-			{
-				sprite->undoMoveY();
-				int spr_direction = 1;
-				int spr_force = 1;
-				if (sprite->getVelY() > 0)
-				{
-					spr_direction = -1;
-				}
-				if (SDL_GetTicks() % 2 == 0)
-				{
-					spr_force = 2;
-				}
-				sprite->setVelY(spr_force * spr_direction);
-				JA_PlaySound(sound);
-			}
-			sprite->update();
-
-			// Actualiza el degradado
-			if (counter % 1 == 0)
-			{
-				gradBreathDirection == 0 ? gradCurrentColor-- : gradCurrentColor++;
-				if (gradCurrentColor == gradColorMin)
-				{
-					gradBreathDirection = 1;
-				}
-				if (gradCurrentColor == gradColorMax)
-				{
-					gradBreathDirection = 0;
-				}
-			}
-		}
-
-		// Dibuja en pantalla
-		screen->start();
-		screen->clean();
-
-		// Dibuja un degradado de fondo
-		const int gradFirstLine = options->screen.nativeHeight / 3;
-		const int gradLastLine = options->screen.nativeHeight;
-		const int gradNumLines = gradLastLine - gradFirstLine;
-		const int gradColorFrom = 0;
-
-		for (int i = gradFirstLine; i < gradLastLine; ++i)
-		{
-			float step = ((float)(i - gradFirstLine) / gradNumLines);
-			int color = gradColorFrom + ((gradCurrentColor - gradColorFrom) * step);
-			SDL_SetRenderDrawColor(renderer, color, 0x00, 0x00, 0xFF);
-			SDL_RenderDrawLine(renderer, 0, i, options->screen.nativeWidth, i);
-		}
-
-		for (int i = gradLastLine; i > gradFirstLine; --i)
-		{
-			float step = ((float)(i - gradFirstLine) / gradNumLines);
-			int alpha = 0 + ((255 - 0) * step);
-			SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0xFF, alpha);
-			SDL_RenderDrawLine(renderer, 0, gradLastLine - i, options->screen.nativeWidth, gradLastLine - i);
-		}
-
-		// Dibuja el sprite
-		sprite->render();
-
-		// Escribe el texto
-		text->setZoom(2);
-		text->writeDX(TXT_CENTER | TXT_SHADOW, options->screen.nativeWidth / 2, text->getCharacterSize(), "Jail Engine DEMO", 1, {255, 255, 255}, 1, {48, 48, 48});
-		text->disableZoom();
-		text->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, options->screen.nativeWidth / 2, text->getCharacterSize() * 7, "Pulsa 'N' para mostrar", 1, {240, 240, 240}, 1, {0, 0, 192});
-		text->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, options->screen.nativeWidth / 2, text->getCharacterSize() * 8, "una notificacion", 1, {240, 240, 240}, 1, {0, 0, 192});
-		debugText->writeCentered(options->screen.nativeWidth / 2, options->screen.nativeHeight / 2, controllerName);
-		debugText->writeCentered(options->screen.nativeWidth / 2, (options->screen.nativeHeight / 2) + (debugText->getCharacterSize()*2), inputPressed);
-
-		// Vuelca el buffer en pantalla
-		screen->blit();
 	}
 
+	if (sprite->getPosY() + sprite->getHeight() > options->screen.nativeHeight or sprite->getPosY() < 0)
+	{
+		sprite->undoMoveY();
+		int spr_direction = 1;
+		int spr_force = 1;
+		if (sprite->getVelY() > 0)
+		{
+			spr_direction = -1;
+		}
+		if (SDL_GetTicks() % 2 == 0)
+		{
+			spr_force = 2;
+		}
+		sprite->setVelY(spr_force * spr_direction);
+		JA_PlaySound(sound);
+	}
+
+	sprite->update();
+}
+
+// Actualiza el degradado
+void updateGradient()
+{
+	if (counter % 1 == 0)
+	{
+		gradBreathDirection == 0 ? gradCurrentColor-- : gradCurrentColor++;
+		if (gradCurrentColor == gradColorMin)
+		{
+			gradBreathDirection = 1;
+		}
+		if (gradCurrentColor == gradColorMax)
+		{
+			gradBreathDirection = 0;
+		}
+	}
+}
+
+// Actualiza el efecto de fuego
+void updateFire()
+{
+	const int w = fireWidth;
+	const int h = fireHeight;
+	const int mod = 157 - fireModifier;
+
+	// Bloquea la textura para poder escribir en los pixeles
+	SDL_LockTexture(fireTexture, NULL, (void **)&fireBuffer, &pitch);
+
+	// Crea la fila inferior del fuego con pixels aleatorios
+	for (int x = 0; x < w; ++x)
+	{
+		fire[h - 1][x] = rand() % 256;
+		fireBuffer[x + (h - 1) * 320] = palette[fire[h - 1][x]];
+	}
+
+	// Calcula los pixeles del efecto de fuego, desde la fila superior hasta la inferior
+	for (int y = 0; y < h - 1; ++y)
+		for (int x = 0; x < w; ++x)
+		{
+			fire[y][x] = ((fire[(y + 1) % h][(x - 1 + w) % w] + fire[(y + 1) % h][(x) % w] + fire[(y + 1) % h][(x + 1) % w] + fire[(y + 2) % h][(x) % w]) * 32) / mod;
+			fireBuffer[x + y * 320] = palette[fire[y][x]];
+		}
+
+	// Desbloquea la textura
+	SDL_UnlockTexture(fireTexture);
+}
+
+// Actualiza el efecto de fondo
+void updateFX()
+{
+	switch (fx)
+	{
+	case 0: // Degradado
+		updateGradient();
+		break;
+
+	case 1: // Fuego
+		updateFire();
+		break;
+
+	default:
+		break;
+	}
+}
+
+// Actualiza la lógica del programa
+void update()
+{
+	// Comprueba el teclado y los eventos
+	checkEvents();
+
+	// Comprueba el objeto input
+	checkInput();
+
+	// Actualiza la lógica del programa
+	if (SDL_GetTicks() - ticks > ticksSpeed)
+	{
+		// Actualiza la variable
+		ticks = SDL_GetTicks();
+
+		// Incrementa el contador
+		counter++;
+
+		// Actualiza los objetos
+		updateOnScreenKeyboard(); // Actualiza el teclado en pantalla
+		screen->update();		  // Actualiza la pantalla
+		updateSprite();			  // Actualiza el sprite
+
+		// Actualiza el efecto de fondo
+		updateFX();
+	}
+}
+
+// Dibuja un degradado de fondo
+void renderGradient()
+{
+	const int gradFirstLine = options->screen.nativeHeight / 3;
+	const int gradLastLine = options->screen.nativeHeight;
+	const int gradNumLines = gradLastLine - gradFirstLine;
+	const int gradColorFrom = 0;
+
+	for (int i = gradFirstLine; i < gradLastLine; ++i)
+	{
+		float step = ((float)(i - gradFirstLine) / gradNumLines);
+		int color = gradColorFrom + ((gradCurrentColor - gradColorFrom) * step);
+		SDL_SetRenderDrawColor(renderer, color, 0x00, 0x00, 0xFF);
+		SDL_RenderDrawLine(renderer, 0, i, options->screen.nativeWidth, i);
+	}
+
+	for (int i = gradLastLine; i > gradFirstLine; --i)
+	{
+		float step = ((float)(i - gradFirstLine) / gradNumLines);
+		int alpha = 0 + ((255 - 0) * step);
+		SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0xFF, alpha);
+		SDL_RenderDrawLine(renderer, 0, gradLastLine - i, options->screen.nativeWidth, gradLastLine - i);
+	}
+}
+
+// Dibuja el efecto de fuego
+void renderFire()
+{
+	SDL_RenderCopy(renderer, fireTexture, &fireSource, NULL);
+}
+
+// Dibuja el efecto de fondo
+void renderFX()
+{
+	switch (fx)
+	{
+	case 0: // Degradado
+		renderGradient();
+		break;
+
+	case 1: // Fuego
+		renderFire();
+		break;
+
+	default:
+		break;
+	}
+}
+
+// Dibuja el texto
+void renderText()
+{
+	const string text1 = "Jail Engine DEMO";
+	const string text2 = "2023,2024 JailDesigner";
+	
+	const string text3 = "Pulsa 'F1' o 'F2' para disminuir o aumentar la ventana";
+	
+	const string text4 = "Pulsa 'F3' para cambiar el efecto de fondo: ";
+	const string text5 = "Pulsa 'F4' o 'F5' para modificar el efecto de fuego: ";
+	
+	const string text6 = "Pulsa 'F6' para mostrar una notificacion";
+	const string text7 = "Pulsa 'F7' para mostrar u ocultar el teclado";
+	const string text8 = "Pulsa 'F8' para añadir o eliminar sprites";
+	
+	const string text9 = "Controles:";
+	
+	const string text10 = "Pulsa 'ESCAPE' para terminar el programa";
+	const string fxName = fx == 0 ? "Degradado" : "Fuego";
+
+	const int center = options->screen.nativeWidth / 2;
+
+	text->setZoom(2);
+	text->writeDX(TXT_CENTER | TXT_STROKE, center, text->getCharacterSize(), text1, 1, {255, 255, 255}, 1, {0, 0, 192});
+	text->disableZoom();
+	text->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 4, text2, 1, {240, 240, 240}, 1, {0, 0, 192});
+	
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 7, text3, 1, {240, 240, 240}, 1, {0, 0, 192});
+	
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 9, text4 + fxName, 1, {240, 240, 240}, 1, {0, 0, 192});
+	if (fxName == "Fuego")
+		debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 10, text5 + to_string(fireModifier), 1, {240, 240, 240}, 1, {0, 0, 192});
+	
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 12, text6, 1, {240, 240, 240}, 1, {0, 0, 192});
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 13, text7, 1, {240, 240, 240}, 1, {0, 0, 192});
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 14, text8, 1, {240, 240, 240}, 1, {0, 0, 192});
+	
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 16, text9, 1, {240, 240, 240}, 1, {0, 0, 192});
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 17, controllerName, 1, {240, 240, 240}, 1, {0, 0, 192});
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, text->getCharacterSize() * 18, inputPressed, 1, {240, 240, 240}, 1, {0, 0, 192});
+	
+	debugText->writeDX(TXT_CENTER | TXT_COLOR | TXT_STROKE, center, options->screen.nativeHeight - (text->getCharacterSize() * 2), text10, 1, {240, 240, 240}, 1, {0, 0, 192});
+}
+
+// Dibuja los elementos del programa en pantalla
+void render()
+{
+	// Prepara el objeto screen para dibujar
+	screen->start();
+	screen->clean();
+
+	// Dibuja el efecto de fondo
+	renderFX();
+
+	// Dibuja el sprite
+	sprite->render();
+
+	// Dinuja el texto
+	renderText();
+	
+	// Dibuja el teclado en pantalla
+	renderOnScreenKeyboard();
+
+	// Vuelca el buffer en pantalla
+	screen->blit();
+}
+
+// Libera la memoria reservada
+void freeAll()
+{
 	// Finaliza el sprite
 	if (sprite != nullptr)
-	{
 		delete sprite;
-	}
 	if (texture != nullptr)
-	{
 		delete texture;
-	}
+
+	// Finaliza el teclado en pantalla
+	if (osk != nullptr)
+		delete osk;
 
 	// Finaliza el texto
 	if (text != nullptr)
-	{
 		delete text;
-	}
 	if (debugText != nullptr)
-	{
 		delete debugText;
-	}
 
 	// Finaliza el objeto input
 	if (input != nullptr)
-	{
 		delete input;
-	}
 
 	// Finaliza el objeto screen
 	if (screen != nullptr)
-	{
 		delete screen;
-	}
 
 	// Finaliza jail_audio
 	JA_DeleteSound(sound);
@@ -326,24 +728,37 @@ int main(int argc, char *argv[])
 
 	// Finaliza el objeto con la lista de recuros
 	if (asset != nullptr)
-	{
 		delete asset;
-	}
 
 	// Finaliza las opciones
 	if (options != nullptr)
-	{
 		delete options;
-	}
 
 	// Finaliza SDL y la ventana
 	if (event != nullptr)
-	{
 		delete event;
-	}
 	SDL_DestroyRenderer(renderer);
 	SDL_DestroyWindow(window);
 	SDL_Quit();
+}
+
+int main(int argc, char *argv[])
+{
+	// Inicializa todo
+	initAll(argv);
+
+	// Bucle principal
+	while (!should_exit)
+	{
+		// Actualiza la lógica del programa
+		update();
+
+		// Dibuja los elementos del programa en pantalla
+		render();
+	}
+
+	// Libera la memoria reservada
+	freeAll();
 
 	return 0;
-}
+}

quickcg.cpp

@@ -0,0 +1,428 @@
+/*
+QuickCG 20191227
+
+Copyright (c) 2004-2019, Lode Vandevenne
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/*
+QuickCG is an SDL codebase that wraps some of the SDL functionality.
+It' used by Lode's Computer Graphics Tutorial to work with simple C++ calls
+to demonstrate graphical programs.
+
+QuickCG can handle some things that standard C++ doesn't but that are commonly useful, such as:
+-drawing graphics
+-a bitmap font
+-simplified saving and loading of files
+-reading keyboard and mouse input
+-playing sound
+-color models
+-loading images
+*/
+
+#include "quickcg.h"
+
+#include <cstdlib>
+#include <cmath>
+#include <vector>
+#include <map>
+#include <iostream>
+#include <fstream>
+
+namespace QuickCG
+{
+  ////////////////////////////////////////////////////////////////////////////////
+  // COLOR STRUCTS/////////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////////
+  ColorRGB::ColorRGB(Uint8 r, Uint8 g, Uint8 b)
+  {
+    this->r = r;
+    this->g = g;
+    this->b = b;
+  }
+  ColorRGB::ColorRGB(const ColorRGB8bit &color)
+  {
+    this->r = color.r;
+    this->g = color.g;
+    this->b = color.b;
+  }
+  ColorRGB::ColorRGB()
+  {
+    this->r = 0;
+    this->g = 0;
+    this->b = 0;
+  }
+  ColorRGB8bit::ColorRGB8bit(Uint8 r, Uint8 g, Uint8 b)
+  {
+    this->r = r;
+    this->g = g;
+    this->b = b;
+  }
+  ColorRGB8bit::ColorRGB8bit(const ColorRGB &color)
+  {
+    this->r = color.r;
+    this->g = color.g;
+    this->b = color.b;
+  }
+  ColorRGB8bit::ColorRGB8bit()
+  {
+    this->r = 0;
+    this->g = 0;
+    this->b = 0;
+  }
+
+  // Add two colors
+  ColorRGB operator+(const ColorRGB &color, const ColorRGB &color2)
+  {
+    ColorRGB c;
+    c.r = color.r + color2.r;
+    c.g = color.g + color2.g;
+    c.b = color.b + color2.b;
+    return c;
+  }
+
+  // Subtract two colors
+  ColorRGB operator-(const ColorRGB &color, const ColorRGB &color2)
+  {
+    ColorRGB c;
+    c.r = color.r - color2.r;
+    c.g = color.g - color2.g;
+    c.b = color.b - color2.b;
+    return c;
+  }
+
+  // Multiplies a color with an integer
+  ColorRGB operator*(const ColorRGB &color, int a)
+  {
+    ColorRGB c;
+    c.r = color.r * a;
+    c.g = color.g * a;
+    c.b = color.b * a;
+    return c;
+  }
+
+  // Multiplies a color with an integer
+  ColorRGB operator*(int a, const ColorRGB &color)
+  {
+    ColorRGB c;
+    c.r = color.r * a;
+    c.g = color.g * a;
+    c.b = color.b * a;
+    return c;
+  }
+
+  // Divides a color through an integer
+  ColorRGB operator/(const ColorRGB &color, int a)
+  {
+    if (a == 0)
+      return color;
+    ColorRGB c;
+    c.r = color.r / a;
+    c.g = color.g / a;
+    c.b = color.b / a;
+    return c;
+  }
+
+  // Are both colors equal?
+  bool operator==(const ColorRGB &color, const ColorRGB &color2)
+  {
+    return (color.r == color2.r && color.g == color2.g && color.b == color2.b);
+  }
+
+  // Are both colors not equal?
+  bool operator!=(const ColorRGB &color, const ColorRGB &color2)
+  {
+    return (!(color.r == color2.r && color.g == color2.g && color.b == color2.b));
+  }
+
+  ColorHSL::ColorHSL(Uint8 h, Uint8 s, Uint8 l)
+  {
+    this->h = h;
+    this->s = s;
+    this->l = l;
+  }
+  ColorHSL::ColorHSL()
+  {
+    this->h = 0;
+    this->s = 0;
+    this->l = 0;
+  }
+  ColorHSV::ColorHSV(Uint8 h, Uint8 s, Uint8 v)
+  {
+    this->h = h;
+    this->s = s;
+    this->v = v;
+  }
+  ColorHSV::ColorHSV()
+  {
+    this->h = 0;
+    this->s = 0;
+    this->v = 0;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+  // COLOR CONVERSIONS/////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////////
+
+  /*
+  Convert colors from one type to another
+  r=red  g=green  b=blue  h=hue  s=saturation  l=lightness  v=value
+  Color components from the color structs are Uint8's between 0 and 255
+  color components used in the calculations are normalized between 0.0-1.0
+  */
+
+  // Converts an RGB color to HSL color
+  ColorHSL RGBtoHSL(const ColorRGB &colorRGB)
+  {
+    float r, g, b, h = 0, s = 0, l; // this function works with floats between 0 and 1
+    r = colorRGB.r / 256.0;
+    g = colorRGB.g / 256.0;
+    b = colorRGB.b / 256.0;
+
+    float maxColor = std::max(r, std::max(g, b));
+    float minColor = std::min(r, std::min(g, b));
+
+    if (minColor == maxColor) // R = G = B, so it's a shade of grey
+    {
+      h = 0; // it doesn't matter what value it has
+      s = 0;
+      l = r; // doesn't matter if you pick r, g, or b
+    }
+    else
+    {
+      l = (minColor + maxColor) / 2;
+
+      if (l < 0.5)
+        s = (maxColor - minColor) / (maxColor + minColor);
+      if (l >= 0.5)
+        s = (maxColor - minColor) / (2.0 - maxColor - minColor);
+
+      if (r == maxColor)
+        h = (g - b) / (maxColor - minColor);
+      if (g == maxColor)
+        h = 2.0 + (b - r) / (maxColor - minColor);
+      if (b == maxColor)
+        h = 4.0 + (r - g) / (maxColor - minColor);
+
+      h /= 6; // to bring it to a number between 0 and 1
+      if (h < 0)
+        h += 1;
+    }
+
+    ColorHSL colorHSL;
+    colorHSL.h = int(h * 255.0);
+    colorHSL.s = int(s * 255.0);
+    colorHSL.l = int(l * 255.0);
+    return colorHSL;
+  }
+
+  // Converts an HSL color to RGB color
+  ColorRGB HSLtoRGB(const ColorHSL &colorHSL)
+  {
+    float r, g, b, h, s, l; // this function works with floats between 0 and 1
+    float temp1, temp2, tempr, tempg, tempb;
+    h = colorHSL.h / 256.0;
+    s = colorHSL.s / 256.0;
+    l = colorHSL.l / 256.0;
+
+    // If saturation is 0, the color is a shade of grey
+    if (s == 0)
+      r = g = b = l;
+    // If saturation > 0, more complex calculations are needed
+    else
+    {
+      // set the temporary values
+      if (l < 0.5)
+        temp2 = l * (1 + s);
+      else
+        temp2 = (l + s) - (l * s);
+      temp1 = 2 * l - temp2;
+      tempr = h + 1.0 / 3.0;
+      if (tempr > 1.0)
+        tempr--;
+      tempg = h;
+      tempb = h - 1.0 / 3.0;
+      if (tempb < 0.0)
+        tempb++;
+
+      // red
+      if (tempr < 1.0 / 6.0)
+        r = temp1 + (temp2 - temp1) * 6.0 * tempr;
+      else if (tempr < 0.5)
+        r = temp2;
+      else if (tempr < 2.0 / 3.0)
+        r = temp1 + (temp2 - temp1) * ((2.0 / 3.0) - tempr) * 6.0;
+      else
+        r = temp1;
+
+      // green
+      if (tempg < 1.0 / 6.0)
+        g = temp1 + (temp2 - temp1) * 6.0 * tempg;
+      else if (tempg < 0.5)
+        g = temp2;
+      else if (tempg < 2.0 / 3.0)
+        g = temp1 + (temp2 - temp1) * ((2.0 / 3.0) - tempg) * 6.0;
+      else
+        g = temp1;
+
+      // blue
+      if (tempb < 1.0 / 6.0)
+        b = temp1 + (temp2 - temp1) * 6.0 * tempb;
+      else if (tempb < 0.5)
+        b = temp2;
+      else if (tempb < 2.0 / 3.0)
+        b = temp1 + (temp2 - temp1) * ((2.0 / 3.0) - tempb) * 6.0;
+      else
+        b = temp1;
+    }
+
+    ColorRGB colorRGB;
+    colorRGB.r = int(r * 255.0);
+    colorRGB.g = int(g * 255.0);
+    colorRGB.b = int(b * 255.0);
+    return colorRGB;
+  }
+
+  // Converts an RGB color to HSV color
+  ColorHSV RGBtoHSV(const ColorRGB &colorRGB)
+  {
+    float r, g, b, h = 0.0, s = 0.0, v; // this function works with floats between 0 and 1
+    r = colorRGB.r / 256.0;
+    g = colorRGB.g / 256.0;
+    b = colorRGB.b / 256.0;
+
+    float maxColor = std::max(r, std::max(g, b));
+    float minColor = std::min(r, std::min(g, b));
+
+    v = maxColor;
+
+    if (maxColor != 0.0) // avoid division by zero when the color is black
+    {
+      s = (maxColor - minColor) / maxColor;
+    }
+
+    if (s == 0.0)
+    {
+      h = 0.0; // it doesn't matter what value it has
+    }
+    else
+    {
+      if (r == maxColor)
+        h = (g - b) / (maxColor - minColor);
+      if (g == maxColor)
+        h = 2.0 + (b - r) / (maxColor - minColor);
+      if (b == maxColor)
+        h = 4.0 + (r - g) / (maxColor - minColor);
+
+      h /= 6.0; // to bring it to a number between 0 and 1
+      if (h < 0.0)
+        h++;
+    }
+
+    ColorHSV colorHSV;
+    colorHSV.h = int(h * 255.0);
+    colorHSV.s = int(s * 255.0);
+    colorHSV.v = int(v * 255.0);
+    return colorHSV;
+  }
+
+  // Converts an HSV color to RGB color
+  ColorRGB HSVtoRGB(const ColorHSV &colorHSV)
+  {
+    float r, g, b, h, s, v; // this function works with floats between 0 and 1
+    h = colorHSV.h / 256.0;
+    s = colorHSV.s / 256.0;
+    v = colorHSV.v / 256.0;
+
+    // if saturation is 0, the color is a shade of grey
+    if (s == 0.0)
+      r = g = b = v;
+    // if saturation > 0, more complex calculations are needed
+    else
+    {
+      float f, p, q, t;
+      int i;
+      h *= 6.0;          // to bring hue to a number between 0 and 6, better for the calculations
+      i = int(floor(h)); // e.g. 2.7 becomes 2 and 3.01 becomes 3 or 4.9999 becomes 4
+      f = h - i;         // the fractional part of h
+
+      p = v * (1.0 - s);
+      q = v * (1.0 - (s * f));
+      t = v * (1.0 - (s * (1.0 - f)));
+
+      switch (i)
+      {
+      case 0:
+        r = v;
+        g = t;
+        b = p;
+        break;
+      case 1:
+        r = q;
+        g = v;
+        b = p;
+        break;
+      case 2:
+        r = p;
+        g = v;
+        b = t;
+        break;
+      case 3:
+        r = p;
+        g = q;
+        b = v;
+        break;
+      case 4:
+        r = t;
+        g = p;
+        b = v;
+        break;
+      case 5:
+        r = v;
+        g = p;
+        b = q;
+        break;
+      default:
+        r = g = b = 0;
+        break;
+      }
+    }
+    ColorRGB colorRGB;
+    colorRGB.r = int(r * 255.0);
+    colorRGB.g = int(g * 255.0);
+    colorRGB.b = int(b * 255.0);
+    return colorRGB;
+  }
+
+  Uint32 RGBtoINT(const ColorRGB &colorRGB)
+  {
+    return 65536 * colorRGB.r + 256 * colorRGB.g + colorRGB.b;
+  }
+
+  ColorRGB INTtoRGB(Uint32 colorINT)
+  {
+    ColorRGB colorRGB;
+    colorRGB.r = (colorINT / 65536) % 256;
+    colorRGB.g = (colorINT / 256) % 256;
+    colorRGB.b = colorINT % 256;
+    return colorRGB;
+  }
+}

quickcg.h

@@ -0,0 +1,189 @@
+/*
+QuickCG 20191227
+
+Copyright (c) 2004-2019, Lode Vandevenne
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/*
+QuickCG is an SDL 1.2 codebase that wraps some of the SDL 1.2 functionality.
+It's used by Lode's Computer Graphics Tutorial to work with simple function calls
+to demonstrate graphical programs. It may or may not be of industrial strength
+for games, though I've actually used it for some.
+
+QuickCG can handle some things that standard C++ does not but that are useful, such as:
+-drawing graphics
+-a bitmap font
+-simplified saving and loading of files
+-reading keyboard and mouse input
+-playing sound
+-color models
+-loading images
+
+Contact info:
+My email address is (puzzle the account and domain together with an @ symbol):
+Domain: gmail dot com.
+Account: lode dot vandevenne.
+*/
+
+#ifndef _quickcg_h_included
+#define _quickcg_h_included
+
+#include <SDL2/SDL.h>
+#include <string>
+#include <sstream>
+#include <iomanip>
+#include <vector>
+#include <algorithm> //std::min and std::max
+
+namespace QuickCG
+{
+
+  ////////////////////////////////////////////////////////////////////////////////
+  // useful templates//////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////////
+
+  // don't know why, but the standard C++ abs sometimes gives cryptic errors? if so use this :D
+  template <typename T>
+  const T template_abs(const T &a)
+  {
+    return (a < 0) ? -a : a;
+  }
+
+  // usage: std::string str = valtostr(25454.91654654f);
+  template <typename T>
+  std::string valtostr(const T &val)
+  {
+    std::ostringstream sstream;
+    sstream << val;
+    return sstream.str();
+  }
+
+  // usage: double val = strtoval<double>("465498.654");
+  template <typename T>
+  T strtoval(const std::string &s)
+  {
+    std::istringstream sstream(s);
+    T val;
+    sstream >> val;
+    return val;
+  }
+
+  // length is decimal precision of the floating point number
+  template <typename T>
+  std::string valtostr(const T &val, int length, bool fixed = true)
+  {
+    std::ostringstream sstream;
+    if (fixed)
+      sstream << std::fixed;
+    sstream << std::setprecision(length) << val;
+    return sstream.str();
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+  // COLOR STRUCTS/////////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////////
+
+  struct ColorRGB8bit;
+  // a color with 3 components: r, g and b
+  struct ColorRGB
+  {
+    int r;
+    int g;
+    int b;
+
+    ColorRGB(Uint8 r, Uint8 g, Uint8 b);
+    ColorRGB(const ColorRGB8bit &color);
+    ColorRGB();
+  };
+
+  ColorRGB operator+(const ColorRGB &color, const ColorRGB &color2);
+  ColorRGB operator-(const ColorRGB &color, const ColorRGB &color2);
+  ColorRGB operator*(const ColorRGB &color, int a);
+  ColorRGB operator*(int a, const ColorRGB &color);
+  ColorRGB operator/(const ColorRGB &color, int a);
+  bool operator==(const ColorRGB &color, const ColorRGB &color2);
+  bool operator!=(const ColorRGB &color, const ColorRGB &color2);
+
+  static const ColorRGB RGB_Black(0, 0, 0);
+  static const ColorRGB RGB_Red(255, 0, 0);
+  static const ColorRGB RGB_Green(0, 255, 0);
+  static const ColorRGB RGB_Blue(0, 0, 255);
+  static const ColorRGB RGB_Cyan(0, 255, 255);
+  static const ColorRGB RGB_Magenta(255, 0, 255);
+  static const ColorRGB RGB_Yellow(255, 255, 0);
+  static const ColorRGB RGB_White(255, 255, 255);
+  static const ColorRGB RGB_Gray(128, 128, 128);
+  static const ColorRGB RGB_Grey(192, 192, 192);
+  static const ColorRGB RGB_Maroon(128, 0, 0);
+  static const ColorRGB RGB_Darkgreen(0, 128, 0);
+  static const ColorRGB RGB_Navy(0, 0, 128);
+  static const ColorRGB RGB_Teal(0, 128, 128);
+  static const ColorRGB RGB_Purple(128, 0, 128);
+  static const ColorRGB RGB_Olive(128, 128, 0);
+
+  // a color with 3 components: r, g and b
+  struct ColorRGB8bit
+  {
+    Uint8 r;
+    Uint8 g;
+    Uint8 b;
+
+    ColorRGB8bit(Uint8 r, Uint8 g, Uint8 b);
+    ColorRGB8bit(const ColorRGB &color);
+    ColorRGB8bit();
+  };
+
+  // a color with 3 components: h, s and l
+  struct ColorHSL
+  {
+    int h;
+    int s;
+    int l;
+
+    ColorHSL(Uint8 h, Uint8 s, Uint8 l);
+    ColorHSL();
+  };
+
+  // a color with 3 components: h, s and v
+  struct ColorHSV
+  {
+    int h;
+    int s;
+    int v;
+
+    ColorHSV(Uint8 h, Uint8 s, Uint8 v);
+    ColorHSV();
+  };
+
+  ////////////////////////////////////////////////////////////////////////////////
+  // COLOR CONVERSIONS/////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////////
+  ColorHSL RGBtoHSL(const ColorRGB &colorRGB);
+  ColorRGB HSLtoRGB(const ColorHSL &colorHSL);
+  ColorHSV RGBtoHSV(const ColorRGB &colorRGB);
+  ColorRGB HSVtoRGB(const ColorHSV &colorHSV);
+  Uint32 RGBtoINT(const ColorRGB &colorRGB);
+  ColorRGB INTtoRGB(Uint32 colorINT);
+
+}
+
+#endif

units/gif.c

@@ -0,0 +1,478 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+
+#define EXTENSION_INTRODUCER   0x21
+#define IMAGE_DESCRIPTOR       0x2C
+#define TRAILER                0x3B
+
+#define GRAPHIC_CONTROL        0xF9
+#define APPLICATION_EXTENSION  0xFF
+#define COMMENT_EXTENSION      0xFE
+#define PLAINTEXT_EXTENSION    0x01
+
+#define READ(dst, size) memcpy(dst, buffer, size); buffer += size
+
+typedef struct
+{
+    unsigned short width;
+    unsigned short height;
+    unsigned char fields;
+    unsigned char background_color_index;
+    unsigned char pixel_aspect_ratio;
+}
+screen_descriptor_t;
+
+typedef struct
+{
+    unsigned char r;
+    unsigned char g;
+    unsigned char b;
+}
+rgb;
+
+typedef struct
+{
+    unsigned short image_left_position;
+    unsigned short image_top_position;
+    unsigned short image_width;
+    unsigned short image_height;
+    unsigned char fields;
+}
+image_descriptor_t;
+
+typedef struct
+{
+    unsigned char byte;
+    int prev;
+    int len;
+}
+dictionary_entry_t;
+
+typedef struct
+{
+    unsigned char extension_code;
+    unsigned char block_size;
+}
+extension_t;
+
+typedef struct
+{
+    unsigned char fields;
+    unsigned short delay_time;
+    unsigned char transparent_color_index;
+}
+graphic_control_extension_t;
+
+typedef struct
+{
+    unsigned char application_id[ 8 ];
+    unsigned char version[ 3 ];
+}
+application_extension_t;
+
+typedef struct
+{
+    unsigned short left;
+    unsigned short top;
+    unsigned short width;
+    unsigned short height;
+    unsigned char cell_width;
+    unsigned char cell_height;
+    unsigned char foreground_color;
+    unsigned char background_color;
+}
+plaintext_extension_t;
+
+//static unsigned short width = 0;
+//static unsigned short height = 0;
+//static unsigned char* uncompressed_data = NULL;
+
+void uncompress( int code_length,
+               const unsigned char *input,
+               int input_length,
+               unsigned char *out )
+{
+    //int maxbits;
+    int i, bit;
+    int code, prev = -1;
+    dictionary_entry_t *dictionary;
+    int dictionary_ind;
+    unsigned int mask = 0x01;
+    int reset_code_length;
+    int clear_code; // This varies depending on code_length
+    int stop_code;  // one more than clear code
+    int match_len;
+
+    clear_code = 1 << ( code_length );
+    stop_code = clear_code + 1;
+    // To handle clear codes
+    reset_code_length = code_length;
+
+    // Create a dictionary large enough to hold "code_length" entries.
+    // Once the dictionary overflows, code_length increases
+    dictionary = ( dictionary_entry_t * )
+    malloc( sizeof( dictionary_entry_t ) * ( 1 << ( code_length + 1 ) ) );
+
+    // Initialize the first 2^code_len entries of the dictionary with their
+    // indices.  The rest of the entries will be built up dynamically.
+
+    // Technically, it shouldn't be necessary to initialize the
+    // dictionary.  The spec says that the encoder "should output a
+    // clear code as the first code in the image data stream".  It doesn't
+    // say must, though...
+    for ( dictionary_ind = 0;
+         dictionary_ind < ( 1 << code_length );
+         dictionary_ind++ )
+    {
+        dictionary[ dictionary_ind ].byte = dictionary_ind;
+        // XXX this only works because prev is a 32-bit int (> 12 bits)
+        dictionary[ dictionary_ind ].prev = -1;
+        dictionary[ dictionary_ind ].len = 1;
+    }
+
+    // 2^code_len + 1 is the special "end" code; don't give it an entry here
+    dictionary_ind++;
+    dictionary_ind++;
+
+    // TODO verify that the very last byte is clear_code + 1
+    while ( input_length )
+    {
+        code = 0x0;
+        // Always read one more bit than the code length
+        for ( i = 0; i < ( code_length + 1 ); i++ )
+        {
+            // This is different than in the file read example; that
+            // was a call to "next_bit"
+            bit = ( *input & mask ) ? 1 : 0;
+            mask <<= 1;
+
+            if ( mask == 0x100 )
+            {
+                mask = 0x01;
+                input++;
+                input_length--;
+            }
+
+            code = code | ( bit << i );
+        }
+
+        if ( code == clear_code )
+        {
+            code_length = reset_code_length;
+            dictionary = ( dictionary_entry_t * ) realloc( dictionary,
+                                                          sizeof( dictionary_entry_t ) * ( 1 << ( code_length + 1 ) ) );
+
+            for ( dictionary_ind = 0;
+                 dictionary_ind < ( 1 << code_length );
+                 dictionary_ind++ )
+            {
+                dictionary[ dictionary_ind ].byte = dictionary_ind;
+                // XXX this only works because prev is a 32-bit int (> 12 bits)
+                dictionary[ dictionary_ind ].prev = -1;
+                dictionary[ dictionary_ind ].len = 1;
+            }
+            dictionary_ind++;
+            dictionary_ind++;
+            prev = -1;
+            continue;
+        }
+        else if ( code == stop_code )
+        {
+            /*if ( input_length > 1 )
+            {
+                fprintf( stderr, "Malformed GIF (early stop code)\n" );
+                exit( 0 );
+            }*/
+            break;
+        }
+
+        // Update the dictionary with this character plus the _entry_
+        // (character or string) that came before it
+        if ( ( prev > -1 ) && ( code_length < 12 ) )
+        {
+            if ( code > dictionary_ind )
+            {
+                fprintf( stderr, "code = %.02x, but dictionary_ind = %.02x\n",
+                        code, dictionary_ind );
+                exit( 0 );
+            }
+
+            // Special handling for KwKwK
+            if ( code == dictionary_ind )
+            {
+                int ptr = prev;
+
+                while ( dictionary[ ptr ].prev != -1 )
+                {
+                    ptr = dictionary[ ptr ].prev;
+                }
+                dictionary[ dictionary_ind ].byte = dictionary[ ptr ].byte;
+            }
+            else
+            {
+                int ptr = code;
+                while ( dictionary[ ptr ].prev != -1 )
+                {
+                    ptr = dictionary[ ptr ].prev;
+                }
+                dictionary[ dictionary_ind ].byte = dictionary[ ptr ].byte;
+            }
+
+            dictionary[ dictionary_ind ].prev = prev;
+
+            dictionary[ dictionary_ind ].len = dictionary[ prev ].len + 1;
+
+            dictionary_ind++;
+
+            // GIF89a mandates that this stops at 12 bits
+            if ( ( dictionary_ind == ( 1 << ( code_length + 1 ) ) ) &&
+                ( code_length < 11 ) )
+            {
+                code_length++;
+
+                dictionary = ( dictionary_entry_t * ) realloc( dictionary,
+                                                              sizeof( dictionary_entry_t ) * ( 1 << ( code_length + 1 ) ) );
+            }
+        }
+
+        prev = code;
+
+        // Now copy the dictionary entry backwards into "out"
+        match_len = dictionary[ code ].len;
+        while ( code != -1 )
+        {
+            out[ dictionary[ code ].len - 1 ] = dictionary[ code ].byte;
+            if ( dictionary[ code ].prev == code )
+            {
+                fprintf( stderr, "Internal error; self-reference." );
+                exit( 0 );
+            }
+            code = dictionary[ code ].prev;
+        }
+
+        out += match_len;
+    }
+}
+
+static int read_sub_blocks( unsigned char* buffer, unsigned char **data )
+{
+    int data_length;
+    int index;
+    unsigned char block_size;
+
+    // Everything following are data sub-blocks, until a 0-sized block is
+    // encountered.
+    data_length = 0;
+    *data = NULL;
+    index = 0;
+
+    while ( 1 )
+    {
+		READ(&block_size, 1);
+
+        if ( block_size == 0 )  // end of sub-blocks
+        {
+            break;
+        }
+
+        data_length += block_size;
+        *data = (unsigned char*)realloc( *data, data_length );
+
+        // TODO this could be split across block size boundaries
+		READ(*data + index, block_size);
+
+        index += block_size;
+    }
+
+    return data_length;
+}
+
+unsigned char* process_image_descriptor( unsigned char* buffer,
+                                    rgb *gct,
+                                    int gct_size,
+                                    int resolution_bits )
+{
+    image_descriptor_t image_descriptor;
+    int compressed_data_length;
+    unsigned char *compressed_data = NULL;
+    unsigned char lzw_code_size;
+    int uncompressed_data_length = 0;
+    unsigned char *uncompressed_data = NULL;
+
+    // TODO there could actually be lots of these
+	READ(&image_descriptor, 9);
+
+    // TODO if LCT = true, read the LCT
+
+	READ(&lzw_code_size, 1);
+
+    compressed_data_length = read_sub_blocks( buffer, &compressed_data );
+
+//    width = image_descriptor.image_width;
+//    height = image_descriptor.image_height;
+    uncompressed_data_length = image_descriptor.image_width *
+    image_descriptor.image_height;
+    uncompressed_data = (unsigned char*)malloc( uncompressed_data_length );
+
+    uncompress( lzw_code_size, compressed_data, compressed_data_length,
+               uncompressed_data );
+
+    if ( compressed_data ) free( compressed_data );
+
+    //if ( uncompressed_data )
+    //    free( uncompressed_data );
+
+    return uncompressed_data;
+}
+
+/**
+ * @param gif_file the file descriptor of a file containing a
+ *  GIF-encoded file.  This should point to the first byte in
+ *  the file when invoked.
+ */
+#define rb (*(buffer++))
+
+uint32_t* LoadPalette(unsigned char *buffer) {
+	unsigned char header[7];
+	screen_descriptor_t screen_descriptor;
+	//int color_resolution_bits;
+
+	int global_color_table_size = 0;  // number of entries in global_color_table
+	uint32_t *global_color_table = NULL;
+
+	READ(header, 6);
+	READ(&screen_descriptor, 7);
+
+	//color_resolution_bits = ((screen_descriptor.fields & 0x70) >> 4) + 1;
+	global_color_table = (uint32_t *)calloc(1, 1024);
+
+	if (screen_descriptor.fields & 0x80) {
+		global_color_table_size = 1 << (((screen_descriptor.fields & 0x07) + 1));
+
+		//global_color_table = (rgb *)malloc(3 * global_color_table_size);
+		//READ(global_color_table, 3 * global_color_table_size);
+        for (int i=0; i<global_color_table_size;++i) {
+            global_color_table[i] = (buffer[0]<<16) + (buffer[1]<<8) + buffer[2];
+            buffer+=3;
+        }
+	}
+	return global_color_table;
+}
+
+static unsigned char* process_gif_stream(unsigned char *buffer, unsigned short* w, unsigned short* h)
+{
+    unsigned char header[ 7 ];
+    screen_descriptor_t screen_descriptor;
+    int color_resolution_bits;
+
+    int global_color_table_size =0;  // number of entries in global_color_table
+    rgb *global_color_table = NULL;
+
+    unsigned char block_type = 0x0;
+
+    // A GIF file starts with a Header (section 17)
+	READ(header, 6);
+    header[ 6 ] = 0x0;
+
+    // XXX there's another format, GIF87a, that you may still find
+    // floating around.
+    /*if ( strcmp( "GIF89a", (char*)header ) )
+    {
+        fprintf( stderr,
+                "Invalid GIF file (header is '%s', should be 'GIF89a')\n",
+                header );
+        return NULL;
+    }*/
+
+    // Followed by a logical screen descriptor
+    // Note that this works because GIFs specify little-endian order; on a
+    // big-endian machine, the height & width would need to be reversed.
+
+    // Can't use sizeof here since GCC does byte alignment;
+    // sizeof( screen_descriptor_t ) = 8!
+	READ(&screen_descriptor, 7);
+    *w = screen_descriptor.width;
+    *h = screen_descriptor.height;
+
+    color_resolution_bits = ( ( screen_descriptor.fields & 0x70 ) >> 4 ) + 1;
+
+    if ( screen_descriptor.fields & 0x80 )
+    {
+        //int i;
+        // If bit 7 is set, the next block is a global color table; read it
+        global_color_table_size = 1 << 
+        ( ( ( screen_descriptor.fields & 0x07 ) + 1 ) );
+        
+        global_color_table = ( rgb * ) malloc( 3 * global_color_table_size );
+        
+        // XXX this could conceivably return a short count...
+		READ(global_color_table, 3 * global_color_table_size);
+    }
+    
+    while ( block_type != TRAILER )
+    {
+		READ(&block_type, 1);
+        
+        unsigned char size;
+        switch ( block_type )
+        {
+            case IMAGE_DESCRIPTOR:
+				return process_image_descriptor(buffer,
+					global_color_table,
+					global_color_table_size,
+					color_resolution_bits);
+                break;
+            case EXTENSION_INTRODUCER:
+                buffer++;
+                size = *(buffer++);
+                buffer += size;
+                do {
+                    size = *(buffer++);
+                    buffer += size;
+                } while (size != 0);
+
+                /*if ( !process_extension( buffer ) )
+                {
+                    return NULL;
+                }*/
+                break;
+            case TRAILER:
+                break;
+            default:
+                fprintf( stderr, "Bailing on unrecognized block type %.02x\n",
+                        block_type );
+                return NULL;
+        }
+    }
+	return NULL;
+}
+
+
+unsigned char* LoadGif(unsigned char *buffer, unsigned short* w, unsigned short* h) {
+	return process_gif_stream(buffer, w, h);
+}
+
+/*int main( int argc, char *argv[] )
+{
+    FILE* gif_file;
+    
+    if ( argc < 2 )
+    {
+        fprintf( stderr, "Usage: %s <path-to-gif-file>\n", argv[ 0 ] );
+        exit( 0 );
+    }
+    
+    gif_file = fopen( argv[ 1 ], "rb" );
+    
+    if ( gif_file == NULL )
+    {
+        fprintf( stderr, "Unable to open file '%s'", argv[ 1 ] );
+        perror( ": " );
+    }
+    
+    process_gif_stream( gif_file );
+    
+    fclose( gif_file );
+}*/

units/input.cpp

@@ -2,7 +2,7 @@
 #include <iostream>
 
 // Constructor
-Input::Input(string file)
+Input::Input(string file, bool verbose)
 {
 	// Fichero gamecontrollerdb.txt
 	dbPath = file;
@@ -11,17 +11,20 @@ Input::Input(string file)
 	keyBindings_t kb;
 	kb.scancode = 0;
 	kb.active = false;
+	keyBindings.clear();
 	keyBindings.resize(INPUT_TOTAL, kb);
 
 	GameControllerBindings_t gcb;
 	gcb.button = SDL_CONTROLLER_BUTTON_INVALID;
 	gcb.active = false;
+	gameControllerBindings.clear();
 	gameControllerBindings.resize(INPUT_TOTAL, gcb);
 
-	verbose = true;
+	this->verbose = verbose;
 	enabled = true;
 
 	setDefaultBindings();
+	discoverGameController();
 }
 
 // Actualiza el estado del objeto
@@ -221,14 +224,25 @@ bool Input::discoverGameController()
 
 	if (verbose)
 	{
-		cout << "\nChecking for game controllers...\n";
+		cout << "\n** Checking game controllers" << endl;
-		cout << nJoysticks << " joysticks found, " << numGamepads << " are gamepads\n";
+		if (nJoysticks > 0)
+		{
+			string stNumJoysticks = nJoysticks == 1 ? "joystick" : "joysticks";
+			string stNumGamePads = numGamepads == 1 ? "is a gamepad" : "are gamepads";
+			cout << nJoysticks << " " << stNumJoysticks << " found (" << numGamepads << " " << stNumGamePads << ")" << endl;
+		}
+		else
+		{
+			cout << ">> No game controllers found" << endl;
+		}
 	}
 
 	if (numGamepads > 0)
 	{
 		found = true;
 
+		cout << "\n>> GAMEPAD LIST:" << endl;
+
 		for (int i = 0; i < numGamepads; i++)
 		{
 			// Abre el mando y lo añade a la lista
@@ -242,7 +256,8 @@ bool Input::discoverGameController()
 				// name = name + separator + to_string(i);
 				if (verbose)
 				{
-					cout << " -" << name << endl;
+					// cout << " - " << name << endl;
+					cout << "#" << i + 1 << ": " << name << endl;
 				}
 				controllerNames.push_back(name);
 			}
@@ -255,6 +270,8 @@ bool Input::discoverGameController()
 			}
 		}
 
+		cout << endl;
+
 		SDL_GameControllerEventState(SDL_ENABLE);
 	}
 
@@ -321,14 +338,21 @@ void Input::setDefaultBindings()
 	bindKey(INPUT_DOWN, SDL_SCANCODE_DOWN);
 	bindKey(INPUT_LEFT, SDL_SCANCODE_LEFT);
 	bindKey(INPUT_RIGHT, SDL_SCANCODE_RIGHT);
-	bindKey(INPUT_EXIT, SDL_SCANCODE_ESCAPE);
+
+	bindKey(INPUT_BUTTON_1, SDL_SCANCODE_Z);
+	bindKey(INPUT_BUTTON_2, SDL_SCANCODE_X);
+
 	bindKey(INPUT_ACCEPT, SDL_SCANCODE_RETURN);
+	bindKey(INPUT_CANCEL, SDL_SCANCODE_BACKSPACE);
+	bindKey(INPUT_PAUSE, SDL_SCANCODE_H);
+	bindKey(INPUT_EXIT, SDL_SCANCODE_ESCAPE);
 
 	// Mando
 	bindGameControllerButton(INPUT_UP, SDL_CONTROLLER_BUTTON_DPAD_UP);
 	bindGameControllerButton(INPUT_DOWN, SDL_CONTROLLER_BUTTON_DPAD_DOWN);
 	bindGameControllerButton(INPUT_LEFT, SDL_CONTROLLER_BUTTON_DPAD_LEFT);
 	bindGameControllerButton(INPUT_RIGHT, SDL_CONTROLLER_BUTTON_DPAD_RIGHT);
+
 	bindGameControllerButton(INPUT_BUTTON_1, SDL_CONTROLLER_BUTTON_A);
 	bindGameControllerButton(INPUT_BUTTON_2, SDL_CONTROLLER_BUTTON_B);
 	bindGameControllerButton(INPUT_BUTTON_3, SDL_CONTROLLER_BUTTON_X);
@@ -337,4 +361,26 @@ void Input::setDefaultBindings()
 	bindGameControllerButton(INPUT_BUTTON_6, SDL_CONTROLLER_BUTTON_START);
 	bindGameControllerButton(INPUT_BUTTON_7, SDL_CONTROLLER_BUTTON_LEFTSHOULDER);
 	bindGameControllerButton(INPUT_BUTTON_8, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER);
+
+	bindGameControllerButton(INPUT_ACCEPT, SDL_CONTROLLER_BUTTON_A);
+	bindGameControllerButton(INPUT_CANCEL, SDL_CONTROLLER_BUTTON_B);
+	bindGameControllerButton(INPUT_PAUSE, SDL_CONTROLLER_BUTTON_START);
+	bindGameControllerButton(INPUT_EXIT, SDL_CONTROLLER_BUTTON_BACK);
+}
+
+// Elimina todas las asociaciones de teclado y mando al objeto
+void Input::clearBindings()
+{
+	// Inicializa las variables
+	keyBindings_t kb;
+	kb.scancode = 0;
+	kb.active = false;
+	keyBindings.clear();
+	keyBindings.resize(INPUT_TOTAL, kb);
+
+	GameControllerBindings_t gcb;
+	gcb.button = SDL_CONTROLLER_BUTTON_INVALID;
+	gcb.active = false;
+	gameControllerBindings.clear();
+	gameControllerBindings.resize(INPUT_TOTAL, gcb);
 }

units/input.h

@@ -89,7 +89,7 @@ private:
 
 public:
 	// Constructor
-	Input(string file);
+	Input(string file, bool verbose=true);
 
 	// Actualiza el estado del objeto
 	void update();
@@ -129,6 +129,9 @@ public:
 
 	// Establece unas teclas y botones del mando por defectp
 	void setDefaultBindings();
+
+	// Elimina todas las asociaciones de teclado y mando al objeto
+	void clearBindings();
 };
 
 #endif

units/on_screen_keyboard.cpp

@@ -0,0 +1,300 @@
+#include "on_screen_keyboard.h"
+// #include <iostream>
+
+// Constructor
+OnScreenKeyboard::OnScreenKeyboard(SDL_Renderer *renderer, Input *input, string bitmapFile, string textFile, options_t *options, int width, int height, string output, color_t color)
+{
+    // Inicializa variables
+    this->renderer = renderer;
+    this->options = options;
+    this->input = input;
+    this->width = width;
+    this->height = height;
+
+    // Crea objetos
+    text = new Text(textFile, bitmapFile, renderer);
+    texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, width, height);
+    textureCursor = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, text->getCharacterSize() * 2, text->getCharacterSize() * 2);
+    SDL_SetTextureBlendMode(textureCursor, SDL_BLENDMODE_BLEND);
+
+    // Inicializa variables
+    this->output = output;
+    char_upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+    char_lower = "abcdefghijklmnopqrstuvwxyz";
+    char_numbers = "0123456789";
+    char_symbol = " !\"#$%&'()*+,-./:;<=>?@[]";
+    use_char_upper = true;
+    use_char_lower = false;
+    use_char_numbers = false;
+    use_char_symbol = false;
+    setLayout();
+    caption = "";
+    dest = {(options->screen.nativeWidth - width) / 2, (options->screen.nativeHeight - height) / 2, width, height};
+    cursor.col = 0;
+    cursor.row = 0;
+    cursor.dest = {0, 0, 16, 16};
+
+    // Rellena la textura de fondo con el color y el texto
+    fillTexture();
+
+    // Rellena la textura del cursor
+    SDL_SetRenderTarget(renderer, textureCursor);
+    color_t c = {192, 0, 0};
+    SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+    SDL_RenderClear(renderer);
+    c = lightenColor(c, 20);
+    SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+    SDL_RenderDrawRect(renderer, NULL);
+    SDL_SetRenderTarget(renderer, nullptr);
+}
+
+// Destructor
+OnScreenKeyboard::~OnScreenKeyboard()
+{
+    // Libera la memoria de los objetos
+    if (text != nullptr)
+    {
+        delete text;
+    }
+
+    if (texture != nullptr)
+    {
+        SDL_DestroyTexture(texture);
+    }
+}
+
+// Rellena la textura de fondo con el color y el texto
+void OnScreenKeyboard::fillTexture()
+{
+    // Destruye la textura si la hubiera
+    if (texture)
+        SDL_DestroyTexture(texture);
+
+    // Crea la textura
+    height = (text->getCharacterSize() * 4) + (text->getCharacterSize() * rows * 2);
+    texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, width, height);
+    dest = {(options->screen.nativeWidth - width) / 2, (options->screen.nativeHeight - height) / 2, width, height};
+
+    // Empieza a dibujar en la textura
+    SDL_SetRenderTarget(renderer, texture);
+
+    // Establece el color de fondo
+    SDL_SetRenderDrawColor(renderer, bgColor.r, bgColor.g, bgColor.b, 255);
+    SDL_RenderClear(renderer);
+    color_t color = lightenColor(bgColor, 20);
+    SDL_SetRenderDrawColor(renderer, color.r, color.g, color.b, 255);
+    SDL_RenderDrawRect(renderer, NULL);
+
+    // Escribe el texto que aparece en el objeto
+    text->write(text->getCharacterSize(), text->getCharacterSize(), caption);
+
+    // Dibuja el cuadro donde va el texto que se escribirá
+    const color_t darkColor = darkenColor(bgColor, 10);
+    SDL_SetRenderDrawColor(renderer, darkColor.r, darkColor.g, darkColor.b, 255);
+    const int x_rect = (text->getCharacterSize() * 2) + text->lenght(caption);
+    const int y_rect = text->getCharacterSize();
+    const int w_rect = width - text->getCharacterSize() - x_rect;
+    const int h_rect = text->getCharacterSize();
+    outputDest = {x_rect, y_rect, w_rect, h_rect};
+    SDL_RenderFillRect(renderer, &outputDest);
+
+    // Dibuja los caracteres que conformaran el teclado
+    const int dist = text->getCharacterSize() * 2;
+    const int offset_x = text->getCharacterSize();
+    const int offset_y = text->getCharacterSize() * 3;
+    for (int j = 0; j < rows; ++j)
+        for (int i = 0; i < columns; ++i)
+        {
+            const int pos = i + (j * columns);
+            if (pos < (int)layout.size())
+            {
+                // color_t color = randColor();
+                // SDL_SetRenderDrawColor(renderer, color.r, color.g, color.b, 255);
+                // SDL_Rect rect = {offset_x + (layout.at(pos).col * dist), offset_y + (layout.at(pos).row * dist), dist, dist};
+                // SDL_RenderFillRect(renderer, &rect);
+                // text->write(offset_x + (layout.at(pos).col * dist) + (dist / 2), offset_y + (layout.at(pos).row * dist) + (dist / 2), layout.at(pos).caption);
+                text->writeCentered(offset_x + (layout.at(pos).col * dist) + (dist / 2), offset_y + (layout.at(pos).row * dist) + (dist / 4), layout.at(pos).caption);
+            }
+        }
+
+    // Deja de dibujar en la textura
+    SDL_SetRenderTarget(renderer, nullptr);
+}
+
+// Calcula cuantos caracteres se utilizaran para crear el teclado
+int OnScreenKeyboard::getTotalChars()
+{
+    int total = 0;
+    total += use_char_upper ? char_upper.length() : 0;
+    total += use_char_lower ? char_lower.length() : 0;
+    total += use_char_numbers ? char_numbers.length() : 0;
+    total += use_char_symbol ? char_symbol.length() : 0;
+    return total;
+}
+
+// Calcula cuantas columnas necesita el teclado
+int OnScreenKeyboard::getColumns()
+{
+    const int keyWidth = text->getCharacterSize() * 2;
+    int rowWidth = width - text->getCharacterSize();
+
+    return rowWidth / keyWidth;
+}
+
+// Calcula cuantas filas necesita el teclado
+int OnScreenKeyboard::getRows()
+{
+    return (totalChars / getColumns()) + 1;
+}
+
+// Establece la disposición del teclado
+void OnScreenKeyboard::setLayout()
+{
+    totalChars = getTotalChars();
+    columns = getColumns();
+    rows = getRows();
+    int index_col = 0;
+    int index_row = 0;
+
+    // Establece los caracteres a escribir
+    string allChars = "";
+    allChars = use_char_upper ? allChars + char_upper : allChars;
+    allChars = use_char_lower ? allChars + char_lower : allChars;
+    allChars = use_char_numbers ? allChars + char_numbers : allChars;
+    allChars = use_char_symbol ? allChars + char_symbol : allChars;
+
+    layout.clear();
+    for (int i = 0; i < (int)allChars.length(); ++i)
+    {
+        key_t key;
+        key.col = index_col;
+        key.row = index_row;
+        key.caption = allChars.substr(i, 1);
+        layout.push_back(key);
+
+        ++index_col;
+        if (index_col == columns)
+        {
+            index_col = 0;
+            ++index_row;
+        }
+    }
+}
+
+// Comprueba las entradas
+void OnScreenKeyboard::checkInput()
+{
+    if (input->checkInput(INPUT_LEFT, REPEAT_FALSE))
+        decCursorCol();
+
+    if (input->checkInput(INPUT_RIGHT, REPEAT_FALSE))
+        incCursorCol();
+
+    if (input->checkInput(INPUT_UP, REPEAT_FALSE))
+        decCursorRow();
+
+    if (input->checkInput(INPUT_DOWN, REPEAT_FALSE))
+        incCursorRow();
+
+    if (input->checkInput(INPUT_ACCEPT, REPEAT_FALSE))
+        addChar();
+
+    if (input->checkInput(INPUT_CANCEL, REPEAT_FALSE))
+        removeChar();
+}
+
+// Disminuye en una columna la posición del cursor
+void OnScreenKeyboard::decCursorCol()
+{
+    cursor.col = cursor.col > 0 ? cursor.col - 1 : columns - 1;
+}
+
+// Incrementa en una columna la posición del cursor
+void OnScreenKeyboard::incCursorCol()
+{
+    ++cursor.col %= columns;
+}
+
+// Disminuye en una fila la posición del cursor
+void OnScreenKeyboard::decCursorRow()
+{
+    cursor.row = cursor.row > 0 ? cursor.row - 1 : rows - 1;
+}
+
+// Aumenta en una fila la posición del cursor
+void OnScreenKeyboard::incCursorRow()
+{
+    ++cursor.row %= rows;
+}
+
+// Actualiza la posición de la textura del cursor
+void OnScreenKeyboard::updateCursor()
+{
+    const int offset_x = text->getCharacterSize();
+    const int offset_y = text->getCharacterSize() * 3;
+
+    cursor.dest.x = dest.x + offset_x + (cursor.col * cursor.dest.w);
+    cursor.dest.y = dest.y + offset_y + (cursor.row * cursor.dest.h);
+}
+
+// Añade un caracter a la salida
+void OnScreenKeyboard::addChar()
+{
+    const int pos = cursor.col + cursor.row * columns;
+    if (pos < (int)layout.size())
+        output = output + layout.at(pos).caption;
+}
+
+// Borra el último caracter de la salida
+void OnScreenKeyboard::removeChar()
+{
+    if (output.length() > 0)
+        output = output.substr(0, output.length() - 1);
+}
+
+// Actualiza la lógica del objeto
+void OnScreenKeyboard::update()
+{
+    // Comprueba las entradas
+    checkInput();
+
+    // Actualiza la posición de la textura del cursor
+    updateCursor();
+}
+
+// Dibuja el objeto en pantalla
+void OnScreenKeyboard::render()
+{
+    SDL_RenderCopy(renderer, texture, nullptr, &dest);
+    SDL_RenderCopy(renderer, textureCursor, nullptr, &cursor.dest);
+
+    const int pos = cursor.col + cursor.row * columns;
+    const string key = pos < (int)layout.size() ? layout.at(pos).caption : "";
+    text->writeDX(TXT_CENTER | TXT_COLOR, cursor.dest.x + cursor.dest.w / 2, cursor.dest.y + cursor.dest.w / 4, key, 1, {0, 255, 0});
+    text->write(dest.x + outputDest.x, dest.y + outputDest.y, output);
+}
+
+// Establece el color de fondo
+void OnScreenKeyboard::setBgColor(color_t color)
+{
+    bgColor = color;
+    fillTexture();
+}
+
+// Establece el texto a mostrar junto al texto a introducir
+void OnScreenKeyboard::setCaption(string text)
+{
+    caption = text;
+    fillTexture();
+}
+
+// Establece qué caracteres ofrecerá el objeto
+void OnScreenKeyboard::setChars(Uint8 mode)
+{
+    use_char_upper = ((mode & USE_UPPER) == USE_UPPER);
+    use_char_lower = ((mode & USE_LOWER) == USE_LOWER);
+    use_char_numbers = ((mode & USE_NUMBER) == USE_NUMBER);
+    use_char_symbol = ((mode & USE_SYMBOL) == USE_SYMBOL);
+    setLayout();
+    fillTexture();
+}

units/on_screen_keyboard.h

@@ -0,0 +1,128 @@
+#pragma once
+
+#include <SDL2/SDL.h>
+#include "utils.h"
+#include "text.h"
+#include "input.h"
+
+#ifndef ON_SCREEN_KEYBOARD_H
+#define ON_SCREEN_KEYBOARD_H
+
+#define USE_UPPER 1
+#define USE_LOWER 2
+#define USE_NUMBER 4
+#define USE_SYMBOL 8
+
+using namespace std;
+
+class OnScreenKeyboard
+{
+private:
+	// Objetos y punteros
+	SDL_Renderer *renderer;		// El renderizador de la ventana
+	Text *text;					// Objeto para dibujar texto
+	Input *input;				// Gestor de eventos de entrada de teclado o gamepad
+	options_t *options;			// Variable con todas las opciones del programa
+	SDL_Texture *texture;		// Textura donde dibujar el objeto
+	SDL_Texture *textureCursor; // Textura para dibujar el cursor
+
+	// Estructuras
+	struct key_t
+	{
+		int col;		// Posición horizontal de la tecla
+		int row;		// Posición vertical de la tecla
+		string caption; // Texto de la tecla
+	};
+
+	struct cursor_t
+	{
+		int col;
+		int row;
+		SDL_Rect dest;
+	};
+
+	// Variables
+	string char_upper;	   // Cadena de texto con las letras en mayúscula
+	string char_lower;	   // Cadena de texto con las letras en minuscula
+	string char_numbers;   // Cadena de texto con los números
+	string char_symbol;	   // Cadena de texto con los símbolos
+	bool use_char_upper;   // Indica si se utilizará ese set de caracteres
+	bool use_char_lower;   // Indica si se utilizará ese set de caracteres
+	bool use_char_numbers; // Indica si se utilizará ese set de caracteres
+	bool use_char_symbol;  // Indica si se utilizará ese set de caracteres
+	int totalChars;		   // Cantidad de caracteres a utilizar
+	int columns;		   // Cantidad de caracteres que hay en una fila del teclado
+	int rows;			   // Cantidad de filas de caracteres que tendrá el teclado
+	color_t bgColor;	   // Color usado para el fondo
+	string caption;		   // Texto a mostrar junto al texto a introducir
+	int width;			   // Ancho del objeto
+	int height;			   // Altura del objeto
+	SDL_Rect dest;		   // Coordenadas donde se dibuja el objeto en pantalla
+	vector<key_t> layout;  // Contiene la disposición del teclado
+	cursor_t cursor;	   // Variable para gestionar el cursor
+	string output;		   // Texto de salida
+	SDL_Rect outputDest;   // Rectangulo con el texto de salida
+
+	// Rellena la textura de fondo con el color y el texto
+	void fillTexture();
+
+	// Calcula cuantos caracteres se utilizaran para crear el teclado
+	int getTotalChars();
+
+	// Calcula cuantas columnas necesita el teclado
+	int getColumns();
+
+	// Calcula cuantas filas necesita el teclado
+	int getRows();
+
+	// Establece la disposición del teclado
+	void setLayout();
+
+	// Comprueba las entradas
+	void checkInput();
+
+	// Disminuye en una columna la posición del cursor
+	void decCursorCol();
+
+	// Incrementa en una columna la posición del cursor
+	void incCursorCol();
+
+	// Disminuye en una fila la posición del cursor
+	void decCursorRow();
+
+	// Aumenta en una columna la posición del cursor
+	void incCursorRow();
+
+	// Actualiza la posición de la textura del cursor
+	void updateCursor();
+
+	// Añade un caracter a la salida
+	void addChar();
+
+	// Borra el último caracter de la salida
+	void removeChar();
+
+public:
+	// Constructor
+	OnScreenKeyboard(SDL_Renderer *renderer, Input *input, string bitmapFile, string textFile, options_t *options, int width, int height, string output = "", color_t color = {0, 0, 0});
+
+	// Destructor
+	~OnScreenKeyboard();
+
+	// Actualiza la lógica del objeto
+	void update();
+
+	// Dibuja el objeto en pantalla
+	void render();
+
+	// Establece el color de fondo
+	void setBgColor(color_t color);
+
+	// Establece el texto a mostrar junto al texto a introducir
+	void setCaption(string text);
+
+	// Establece qué caracteres ofrecerá el objeto
+	void setChars(Uint8 mode);
+};
+
+#endif

units/paleta.cpp

@@ -0,0 +1,165 @@
+#include "paleta.h"
+#include "gif.c"
+#include <stdio.h>
+
+struct jSurface_s
+{
+    Uint8 *data;
+    Uint16 w, h;
+};
+
+static SDL_Window *jWin = NULL;
+static SDL_Renderer *jRen = NULL;
+static SDL_Texture *jTex = NULL;
+static jSurface jScreen;
+static jSurface jDestSurf;
+static jSurface jSourceSurf = NULL;
+static Uint32 paleta[256];
+static int jWidth = 320;
+static int jHeight = 240;
+static int jZoom = 2;
+static int transparentColor = 0;
+
+jSurface jNewSurface(int w, int h)
+{
+    jSurface surf = (jSurface)malloc(sizeof(jSurface_s));
+    surf->w = w;
+    surf->h = h;
+    surf->data = (Uint8 *)malloc(w * h);
+    return surf;
+}
+
+void jDeleteSurface(jSurface surf)
+{
+    if (surf == NULL)
+        return;
+    if (surf->data != NULL)
+        free(surf->data);
+    free(surf);
+}
+
+void jSetDest(jSurface surf)
+{
+    if (surf == NULL)
+        jDestSurf = jScreen;
+    else
+        jDestSurf = surf;
+}
+
+void jSetSource(jSurface surf)
+{
+    jSourceSurf = surf;
+}
+
+void jBlit(int dx, int dy, int sx, int sy, int w, int h)
+{
+    if (jSourceSurf == NULL)
+        return;
+    
+    for (int iy = 0; iy < h; ++iy)
+    {
+        for (int ix = 0; ix < w; ++ix)
+            jPutPixel(dx + ix, dy + iy, jGetPixel(sx + ix, sy + iy));
+    }
+}
+
+jSurface jLoadSurface(const char *filename)
+{
+    FILE *f = fopen(filename, "rb");
+    if (!f)
+        return NULL;
+
+    fseek(f, 0, SEEK_END);
+    long size = ftell(f);
+    fseek(f, 0, SEEK_SET);
+    Uint8 *buffer = (Uint8 *)malloc(size);
+    fread(buffer, size, 1, f);
+    fclose(f);
+
+    Uint16 w, h;
+    Uint8 *pixels = LoadGif(buffer, &w, &h);
+    if (pixels == NULL)
+    {
+        return NULL;
+    }
+    jSurface surf = (jSurface)malloc(sizeof(jSurface_s));
+    surf->w = w;
+    surf->h = h;
+    surf->data = pixels;
+    free(buffer);
+    return surf;
+}
+
+void jLoadPal(const char *filename)
+{
+    FILE *f = fopen(filename, "rb");
+    if (!f)
+        return;
+
+    fseek(f, 0, SEEK_END);
+    long size = ftell(f);
+    fseek(f, 0, SEEK_SET);
+    Uint8 *buffer = (Uint8 *)malloc(size);
+    fread(buffer, size, 1, f);
+    fclose(f);
+
+    Uint32 *pal = LoadPalette(buffer);
+    if (pal == NULL)
+    {
+        return;
+    }
+    free(buffer);
+    for (int i = 0; i < 256; ++i)
+    {
+        paleta[i] = pal[i];
+    }
+}
+
+void jInit(const char *titol, int w, int h, int z)
+{
+    SDL_Init(SDL_INIT_EVERYTHING);
+    jWidth = w;
+    jHeight = h;
+    jZoom = z;
+    jWin = SDL_CreateWindow(titol, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, w * z, h * z, SDL_WINDOW_SHOWN);
+    jRen = SDL_CreateRenderer(jWin, -1, 0);
+    SDL_RenderSetLogicalSize(jRen, w, h);
+    jTex = SDL_CreateTexture(jRen, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, w, h);
+    jScreen = jNewSurface(w, h);
+    jDestSurf = jScreen;
+}
+
+void jSetPal(int index, Uint32 color)
+{
+    paleta[index] = color;
+}
+
+void jCls(Uint8 color)
+{
+    for (int i = 0; i < jDestSurf->w * jDestSurf->h; ++i)
+        jDestSurf->data[i] = color;
+}
+
+void jFlip()
+{
+    Uint32 *pixels;
+    int pitch;
+    SDL_LockTexture(jTex, NULL, (void **)&pixels, &pitch);
+    for (int i = 0; i < jWidth * jHeight; ++i)
+        pixels[i] = paleta[jScreen->data[i]];
+    SDL_UnlockTexture(jTex);
+    SDL_RenderCopy(jRen, jTex, NULL, NULL);
+    SDL_RenderPresent(jRen);
+}
+
+void jPutPixel(int x, int y, Uint8 color)
+{
+    if (x < 0 || y < 0 || x >= jDestSurf->w || y >= jDestSurf->h || color == transparentColor)
+        return;
+    jDestSurf->data[x + y * jDestSurf->w] = color;
+}
+
+Uint8 jGetPixel(int x, int y)
+{
+    return jSourceSurf->data[x + y * jSourceSurf->w];
+}

units/paleta.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <SDL2/SDL.h>
+
+typedef struct jSurface_s *jSurface;
+
+void init();
+void update();
+
+jSurface jNewSurface(int w, int h);
+void jDeleteSurface(jSurface surf);
+void jSetDest(jSurface surf);
+void jSetSource(jSurface surf);
+
+jSurface jLoadSurface(const char* filename);
+
+void jPutPixel(int x, int y, Uint8 color);
+Uint8 jGetPixel(int x, int y);
+
+void jBlit(int dx, int dy, int sx, int sy, int w, int h);
+
+void jInit(const char *titol, int w, int h, int z);
+
+void jSetPal(int index, Uint32 color);
+void jLoadPal(const char *filename);
+
+void jCls(Uint8 color);
+
+void jFlip();

units/utils.cpp

@@ -1,6 +1,8 @@
 #include "utils.h"
 #include <math.h>
 
+using namespace std;
+
 // Calcula el cuadrado de la distancia entre dos puntos
 double distanceSquared(int x1, int y1, int x2, int y2)
 {
@@ -576,7 +578,37 @@ void initOptions(options_t *options)
     options->screen.borderHeight = 0;
 
     options->notifications.posV = pos_top;
-	options->notifications.posH = pos_left;
+    options->notifications.posH = pos_left;
-	options->notifications.sound = true;
+    options->notifications.sound = true;
-	options->notifications.color = {48, 48, 48};
+    options->notifications.color = {48, 48, 48};
+}
+
+// Oscurece un color
+color_t darkenColor(color_t color, int amount)
+{
+    color_t newColor;
+    newColor.r = max(0, color.r - amount);
+    newColor.g = max(0, color.g - amount);
+    newColor.b = max(0, color.b - amount);
+    return newColor;
+}
+
+// Aclara un color
+color_t lightenColor(color_t color, int amount)
+{
+    color_t newColor;
+    newColor.r = min(255, color.r + amount);
+    newColor.g = min(255, color.g + amount);
+    newColor.b = min(255, color.b + amount);
+    return newColor;
+}
+
+// Obtiene un color aleatorio
+color_t randColor()
+{
+    color_t newColor;
+    newColor.r = rand() % 256;
+    newColor.g = rand() % 256;
+    newColor.b = rand() % 256;
+    return newColor;
 }

units/utils.h

@@ -201,4 +201,13 @@ bool colorAreEqual(color_t color1, color_t color2);
 // Inicializa la estructura de opciones
 void initOptions(options_t *options);
 
+// Oscurece un color
+color_t darkenColor(color_t color, int amount);
+
+// Aclara un color
+color_t lightenColor(color_t color, int amount);
+
+// Obtiene un color aleatorio
+color_t randColor();
+
 #endif