@@ -0,0 +1,72 @@ 
+#include <SDL/SDL.h>
+#include <SDL/SDL_image.h>
+#include <SDL/SDL_ttf.h>
+#include "config.h"
+#include "Engine.h"
+#include "Catbug.h"
+#include "Timer.h"
+#include "Pickups.h"
+#include "extern.h"
+Catbug* newCatbug(int x, int y)
+{
+  Catbug* self = malloc(sizeof(Catbug));
+
+  self->x = x;
+  self->y = y;
+
+  self->vX = 0;
+  self->vY = 0;
+
+  self->HP = STARTING_HP;
+  self->frame = 0;
+  self->spriteSheet=loadImage("assets/catbug.png");
+
+  return self;
+}
+
+void deleteCatbug(Catbug* target)
+{
+  SDL_FreeSurface(target->spriteSheet);
+  free(target);
+}
+
+void moveCatbug(Catbug* self)
+{
+  self->x += self->vX;
+  self->y += self->vY;
+
+  if (self->x <= 0 || self->x >= 320)
+    self->x -= self->vX;
+  if (self->y <=0 || self->y >= 180)
+    self->y -= self->vY;
+}
+
+void drawCatbug(Catbug* self)
+{
+  SDL_Rect clip;
+  clip.x = 0;
+  clip.y = 0;
+  clip.w = 43;
+  clip.h = 39;
+
+  switch (self->frame)
+  {
+    case 0:
+      clip.x = 0;
+      self->frame = 1;
+      break;
+    case 1:
+      clip.x = 43;
+      self->frame = 0;
+      break;
+  }
+  applySurface(self->x - 22, self->y - 19, self->spriteSheet, screen, &clip);
+}
+
+int isInRect(Catbug* self, SDL_Rect* box)
+{
+  if (self->x >= box->x && self->x <= box->x + box->w
+      && self->y >= box->y && self->y <= box->y + box->h)
+    return 1;
+  else return 0;
+}

@@ -0,0 +1,19 @@ 
+typedef struct catbug
+{
+  SDL_Surface* spriteSheet;
+  unsigned short int frame;
+
+  int x;
+  int y;
+  int vX;
+  int vY;
+
+  unsigned short int HP;
+} Catbug;
+
+Catbug* newCatbug(int x, int y);
+void deleteCatbug(Catbug* target);
+
+int isInRect(Catbug* self, SDL_Rect* box);
+void moveCatbug(Catbug* self);
+void drawCatbug(Catbug* self);

@@ -0,0 +1,441 @@ 
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+#include "config.h"
+
+#include "SDL/SDL.h"
+#include "SDL/SDL_image.h"
+#include "SDL/SDL_ttf.h"
+
+#include "Engine.h"
+#include "Timer.h"
+#include "Catbug.h"
+#include "Pickups.h"
+
+#include "extern.h"
+
+SDL_Surface* loadImage(char* filename)
+{
+  SDL_Surface* loadedImage = NULL;
+  SDL_Surface* optimizedImage = NULL;
+
+  loadedImage = IMG_Load(filename);
+  if (loadedImage != NULL)
+  {
+    optimizedImage = SDL_DisplayFormat(loadedImage);
+    SDL_FreeSurface(loadedImage);
+  }
+
+  return optimizedImage;
+}
+
+void applySurface(int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect* clip)
+{
+  SDL_Rect offset;
+  offset.x = x;
+  offset.y = y;
+
+  SDL_BlitSurface(source, clip, destination, &offset);
+}
+
+Uint32 getPixel(SDL_Surface* surface, int x, int y)
+{
+  Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * surface->format->BytesPerPixel;
+  return *(Uint32 *)p;
+}
+
+void scaleScreen()
+{
+  Sint32 x, y;
+  static SDL_Rect superPixel = {0,0, SCALE_FACTOR,SCALE_FACTOR};
+
+  switch (SCALE_FACTOR)
+  {
+    case 1:
+      applySurface(0,0,screen,window,NULL);
+      break;
+
+    default:
+      superPixel.y = 0;
+      for (y = 0; y < SCREEN_HEIGHT; y++)
+      {
+        superPixel.x = 0;
+        for (x = 0; x < SCREEN_WIDTH; x++)
+        {
+          SDL_FillRect(window, &superPixel, getPixel(screen, x, y));
+          superPixel.x += SCALE_FACTOR;
+        }
+        superPixel.y += SCALE_FACTOR;
+      }
+      break;
+  }
+}
+
+void updateScore()
+{
+  SDL_Color white = {255,255,255};
+  char sPoints[10];
+  sprintf(sPoints, "%d", points);
+  score = TTF_RenderText_Solid(font,sPoints,white);
+  applySurface(10, 20, score, screen, NULL);
+}
+
+void drawHP()
+{
+  int i;
+  for (i = 0; i < player->HP; i++)
+  {
+    applySurface(10+(6*i), 10, hpwedge, screen, NULL);
+  }
+}
+
+void checkHP()
+{
+  if (player->HP <= 0)
+  {
+    scoreSummary();
+    quit = 1;
+  }
+}
+
+void scoreSummary()
+{
+  SDL_Surface* yougot = NULL;
+  SDL_Surface* hiscore = NULL;
+  SDL_Color white = {255, 255, 255};
+  char sPoints[10];
+
+  sprintf(sPoints,"%d", points);
+  yougot = TTF_RenderText_Solid(font2, "SCORE:" ,white);
+  hiscore = TTF_RenderText_Solid(font2, sPoints, white);
+
+  int here = 1;
+  while (here)
+  {
+    timeStart(&fps);
+    renderBG();
+    applySurface(120, 80, yougot, screen, NULL);
+    applySurface(120, 105, hiscore, screen, NULL);
+
+    while (SDL_PollEvent(&event))
+    {
+      switch (event.type)
+      {
+        case SDL_KEYDOWN:
+          switch (event.key.keysym.sym)
+          {
+            case FS_BUTTON:
+              toggleFullscreen();
+              break;
+            case PAUSE_BUTTON:
+              here = 0;
+              quit = 0;
+              break;
+            case QUIT_BUTTON:
+              here = 0;
+              playing = 0;
+            default:
+              break;
+          }
+          break;
+        case SDL_QUIT:
+          here = 0;
+          playing = 0;
+          break;
+        default:
+          break;
+      }
+    }
+    frameAdvance();
+  }
+  SDL_FreeSurface(yougot);
+  SDL_FreeSurface(hiscore);
+}
+
+void renderBG()
+{
+  static int x = 0;
+  applySurface(x,0,bg,screen,NULL);
+  applySurface(x+1472,0,bg,screen,NULL);
+  x -= 8;
+  if (x == -1472) x = 0;
+}
+
+void interact()
+{
+  while (SDL_PollEvent(&event))
+  {
+    switch (event.type)
+    {
+      case SDL_KEYDOWN:
+        switch (event.key.keysym.sym)
+        {
+          case DPAD_UP:
+            player->vY = -PLAYER_SPD;
+            break;
+          case DPAD_LEFT:
+            player->vX = -PLAYER_SPD;
+            break;
+          case DPAD_DOWN:
+            player->vY = PLAYER_SPD;
+            break;
+          case DPAD_RIGHT:
+            player->vX = PLAYER_SPD;
+            break;
+          case FS_BUTTON:
+            toggleFullscreen();
+            break;
+          case PAUSE_BUTTON:
+            pauseGame();
+            break;
+          case QUIT_BUTTON:
+            quit = 1;
+            playing = 0;
+            break;
+          default:
+            break;
+        }
+        break;
+      case SDL_KEYUP:
+        switch (event.key.keysym.sym)
+        {
+          case DPAD_UP:
+            if (player->vY < 0)
+              player->vY = 0;
+            break;
+          case DPAD_LEFT:
+            if (player->vX < 0)
+              player->vX = 0;
+            break;
+          case DPAD_DOWN:
+            if (player->vY > 0)
+              player->vY = 0;
+            break;
+          case DPAD_RIGHT:
+            if (player->vX > 0)
+              player->vX = 0;
+            break;
+          default:
+            break;
+        }
+        break;
+      case SDL_QUIT:
+        quit = 1;
+        playing = 0;
+        break;
+      default:
+        break;
+    }
+  }
+}
+
+int init(int argc, char* args[])
+{
+  int i;
+  printf("Initializing SDL\n");
+
+  if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER) == -1) return 0;
+  printf("Initialized SDL\nCreating window\n");
+
+  if (argc >= 2)
+  {
+    if (strcmp(args[1], "-w"))
+    {
+      window = SDL_SetVideoMode(SCREEN_WIDTH*SCALE_FACTOR, SCREEN_HEIGHT*SCALE_FACTOR, 32, SDL_FULLSCREEN|SDL_HWSURFACE);
+      fullscreen = 1;
+    }
+    else window = SDL_SetVideoMode(SCREEN_WIDTH*SCALE_FACTOR, SCREEN_HEIGHT*SCALE_FACTOR, 32, SDL_HWSURFACE|SDL_RESIZABLE);
+  }
+  else
+  {
+    window = SDL_SetVideoMode(SCREEN_WIDTH*SCALE_FACTOR, SCREEN_HEIGHT*SCALE_FACTOR, 32, SDL_FULLSCREEN|SDL_HWSURFACE);
+    fullscreen = 1;
+  }
+  SDL_ShowCursor(0);
+
+  screen = loadImage("assets/rawscreen.png");
+  if (window == NULL || screen == NULL) return 0;
+
+  SDL_WM_SetCaption("Catbug", NULL);
+  printf("Window created\nInitializing data\n");
+
+  if (TTF_Init() == -1) return 0;
+
+  ticker = time(NULL);
+  bg = loadImage("assets/seethruzone.png");
+  hpwedge = loadImage("assets/hp.png");
+
+  font = TTF_OpenFont("assets/charriot.ttf", 10);
+  font2 = TTF_OpenFont("assets/charriot.ttf", 20);
+
+  player = newCatbug(35, 90);
+  stuff = malloc(10*sizeof(Pickup*));
+  for (i = 0; i < 10; i++)
+  {
+    stuff[i] = NULL;
+  }
+
+  return 1;
+}
+
+void title()
+{
+  SDL_Surface* titletxt = loadImage("assets/titletext.png");
+  int here = 1;
+  while (here)
+  {
+    timeStart(&fps);
+    renderBG();
+    applySurface(0, 0, titletxt, screen, NULL);
+
+    while (SDL_PollEvent(&event))
+    {
+      switch (event.type)
+      {
+        case SDL_KEYDOWN:
+          switch (event.key.keysym.sym)
+          {
+            case FS_BUTTON:
+              toggleFullscreen();
+              break;
+            case PAUSE_BUTTON:
+              here = 0;
+              quit = 0;
+              break;
+            case QUIT_BUTTON:
+              here = 0;
+              quit = 1;
+              playing = 0;
+            default:
+              break;
+          }
+          break;
+        case SDL_QUIT:
+          here = 0;
+          playing = 0;
+          quit = 1;
+          break;
+        default:
+          break;
+      }
+
+    }
+    frameAdvance();
+  }
+  SDL_FreeSurface(titletxt);
+}
+
+void resetGame()
+{
+  maxHP = STARTING_HP;
+  player->HP = STARTING_HP;
+  player->x = 35;
+  player->y = 90;
+  player->vX = 0;
+  player->vY = 0;
+  points = 0;
+  threshold = 10;
+  cleanPickups();
+}
+
+void pauseGame()
+{
+  SDL_Color white = {255,255,255};
+  SDL_Surface* paused = TTF_RenderText_Solid(font,"paused",white);
+
+  int here = 1;
+
+  while (here)
+  {
+    timeStart(&fps);
+    player->vX = 0;
+    player->vY = 0;
+    applySurface(10,30,paused,screen,NULL);
+    while (SDL_PollEvent(&event))
+    {
+      switch (event.type)
+      {
+        case SDL_KEYDOWN:
+          switch (event.key.keysym.sym)
+          {
+            case FS_BUTTON:
+              toggleFullscreen();
+              break;
+            case PAUSE_BUTTON:
+              here = 0;
+              break;
+            case QUIT_BUTTON:
+              here = 0;
+              playing = 0;
+              quit = 1;
+            default:
+              break;
+          }
+          break;
+        case SDL_QUIT:
+          here = 0;
+          playing = 0;
+          quit = 1;
+          break;
+        default:
+          break;
+      }
+    }
+    frameAdvance();
+  }
+  SDL_FreeSurface(paused);
+}
+
+void timeDilation()
+{
+  int i = getTicks(&fps);
+  if (i < 1000/30)
+    SDL_Delay(1000/30 - i);
+}
+
+void frameAdvance()
+{
+  scaleScreen();
+  SDL_Flip(window);
+  timeDilation();
+}
+
+void toggleFullscreen()
+{
+  if (!fullscreen)
+  {
+    SDL_SetVideoMode(SCREEN_WIDTH*SCALE_FACTOR, SCREEN_HEIGHT*SCALE_FACTOR, 32, SDL_FULLSCREEN|SDL_HWSURFACE);
+    fullscreen = 1;
+  }
+  else
+  {
+    SDL_SetVideoMode(SCREEN_WIDTH*SCALE_FACTOR, SCREEN_HEIGHT*SCALE_FACTOR, 32, SDL_HWSURFACE|SDL_RESIZABLE);
+    fullscreen = 0;
+  }
+}
+
+void cleanup()
+{
+  if (fullscreen)
+    toggleFullscreen();
+
+  printf("Freeing assets\n");
+  deleteCatbug(player);
+  cleanPickups();
+  free(stuff);
+
+  SDL_FreeSurface(bg);
+  SDL_FreeSurface(hpwedge);
+  SDL_FreeSurface(score);
+  SDL_FreeSurface(screen);
+  SDL_FreeSurface(window);
+
+  TTF_CloseFont(font);
+  TTF_CloseFont(font2);
+
+  printf("Closing SDL systems\n");
+  TTF_Quit();
+  SDL_Quit();
+  printf("Cleanup complete\n");
+}

@@ -0,0 +1,22 @@ 
+SDL_Surface* loadImage(char* filename);
+void applySurface(int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect* clip);
+void scaleScreen();
+
+void renderBG();
+void drawHP();
+
+void checkHP();
+void updateScore();
+
+void title();
+void resetGame();
+void pauseGame();
+void scoreSummary();
+
+void interact();
+
+int init(int argc, char* args[]);
+void cleanup();
+void toggleFullscreen();
+void timeDilation();
+void frameAdvance();

@@ -0,0 +1,16 @@ 
+CFLAGS= -Wall -I/usr/include/SDL -L/usr/lib/ -lSDL -lSDL_image -lSDL_ttf
+
+.PHONY: all clean cleanobj
+
+all: game
+
+game: main.c Catbug.o Engine.o Timer.o Pickups.o
+	$(CC) -o katbug $^ $(CFLAGS)
+
+cleanobj:
+	rm -f *.o
+
+clean:
+	rm -f katbug *.o
+
+reconfigure: clean game

@@ -0,0 +1,144 @@ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include <SDL/SDL.h>
+#include <SDL/SDL_image.h>
+#include <SDL/SDL_ttf.h>
+
+#include "config.h"
+#include "Engine.h"
+#include "Catbug.h"
+#include "Pickups.h"
+#include "Timer.h"
+#include "extern.h"
+
+Pickup* newPickup()
+{
+  int pType;
+  srand(rand());
+  pType = rand()%10;
+  Pickup* self = malloc(sizeof(Pickup));
+
+  self->y = 16 + rand()%148;
+  self->x = 320 + rand()%120;
+  self->vX = -4 - rand()%maxHP;
+  self->vY = 0;
+
+  switch (pType)
+  {
+    case 0:
+    case 1:
+    case 2:
+    case 3:
+    case 4:
+      self->sprite = loadImage("assets/sugarpeas.png");
+      self->points = 1;
+      break;
+    case 5:
+    case 6:
+    case 7:
+      self->sprite = loadImage("assets/peanutbuttersquare.png");
+      self->points = 2;
+      break;
+    case 8:
+    case 9:
+      self->sprite = loadImage("assets/taco.png");
+      self->points = 3;
+      break;
+  }
+  return self;
+}
+
+void managePickups()
+{
+  int i;
+  int genSpeed;
+  srand(rand());
+
+  if (points > 10)
+    genSpeed = rand()%points;
+  else genSpeed = rand()%10;
+
+  for (i = 0; i < 10; i++)
+  {
+    if (stuff[i] != NULL)
+    {
+      drawPickup(stuff[i]);
+      movePickup(stuff[i]);
+
+      if (stuff[i]->x < -16)
+      {
+        invalidatePickup(stuff[i]);
+        player->HP--;
+        stuff[i] = NULL;
+      }
+      else
+      {
+        SDL_Rect box;
+        box.x = stuff[i]->x - 18;
+        box.y = stuff[i]->y - 18;
+        box.w = 36;
+        box.h = 36;
+
+        if (isInRect(player, &box))
+        {
+          getPickup(stuff[i]);
+          stuff[i] = NULL;
+        }
+      }
+    }
+    else
+    {
+      if ( (stuff[i] == NULL) &&
+          ((points >= 40 && genSpeed*genSpeed >= points*4) ||
+          (points <= 40 && genSpeed*genSpeed >= threshold*2)) )
+      {
+        if (ticker != time(NULL)){
+          stuff[i] = newPickup();
+          ticker = time(NULL);}
+      }
+    }
+  }
+}
+
+void movePickup(Pickup* self)
+{
+  self->x += self->vX;
+}
+
+void drawPickup(Pickup* self)
+{
+  applySurface(self->x - 16, self->y - 16, self->sprite, screen, NULL);
+}
+
+void invalidatePickup(Pickup* self)
+{
+  SDL_FreeSurface(self->sprite);
+  free(self);
+}
+
+void getPickup(Pickup* self)
+{
+  points += self->points;
+  if (points >= threshold)
+  {
+    threshold *= 2;
+    maxHP++;
+    player->HP = maxHP;
+  }
+  invalidatePickup(self);
+}
+
+void cleanPickups()
+{
+  int i;
+  for (i = 0; i < 10; i++)
+  {
+    if (stuff[i] != NULL)
+    {
+      invalidatePickup(stuff[i]);
+      stuff[i] = NULL;
+    }
+  }
+}

@@ -0,0 +1,19 @@ 
+typedef struct pickup
+{
+  int x;
+  int y;
+  int vX;
+  int vY;
+
+  SDL_Surface* sprite;
+  int points;
+} Pickup;
+
+Pickup* newPickup();
+
+void managePickups();
+void movePickup(Pickup* self);
+void drawPickup(Pickup* self);
+void invalidatePickup(Pickup* self);
+void getPickup(Pickup* self);
+void cleanPickups();

@@ -0,0 +1,25 @@ 
+#include "SDL/SDL.h"
+#include "SDL/SDL_image.h"
+#include "SDL/SDL_ttf.h"
+
+#include "Timer.h"
+
+Timer* newTimer()
+{
+    Timer* self = (Timer*)malloc(sizeof(Timer));
+    self->startTicks = 0;
+    return self;
+}
+
+void timeStart(Timer* self)
+{
+    self->startTicks = SDL_GetTicks();
+}
+
+int getTicks(Timer* self)
+{
+  if (self->startTicks)
+    return SDL_GetTicks() - self->startTicks;
+  else return 0;
+}
+

@@ -0,0 +1,8 @@ 
+typedef struct timer
+{
+    int startTicks;
+
+} Timer;
+
+void timeStart(Timer* self);
+int getTicks(Timer* self);

@@ -0,0 +1,19 @@ 
+// key configuration
+// see https://sdl.beuc.net/sdl.wiki/SDLKey for keysyms
+// for joypad support use a tool like antimicro
+#define DPAD_UP       SDLK_UP
+#define DPAD_DOWN     SDLK_DOWN
+#define DPAD_LEFT     SDLK_LEFT
+#define DPAD_RIGHT    SDLK_RIGHT
+
+#define PAUSE_BUTTON  SDLK_SPACE
+#define QUIT_BUTTON   SDLK_q
+#define FS_BUTTON     SDLK_f
+
+// difficulty settings: 3/6/7 is a good balance
+#define STARTING_HP   3
+#define PLAYER_SPD    6
+#define SPEED_MOD     7
+
+// video scaling factor
+#define SCALE_FACTOR  2

@@ -0,0 +1,27 @@ 
+extern int playing;
+extern int quit;
+extern int fullscreen;
+extern int points;
+extern int threshold;
+extern int maxHP;
+
+extern time_t ticker;
+extern Timer fps;
+extern SDL_Event event;
+
+extern SDL_Surface* screen;
+extern SDL_Surface* window;
+extern SDL_Surface* bg;
+extern SDL_Surface* hpwedge;
+extern SDL_Surface* score;
+extern TTF_Font* font;
+extern TTF_Font* font2;
+
+extern Catbug* player;
+extern Pickup** stuff;
+
+enum screenDimension
+{
+  SCREEN_WIDTH = 320,
+  SCREEN_HEIGHT = 180
+};

@@ -0,0 +1,66 @@ 
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <SDL/SDL.h>
+#include <SDL/SDL_image.h>
+#include <SDL/SDL_ttf.h>
+#include "config.h"
+#include "Engine.h"
+#include "Catbug.h"
+#include "Timer.h"
+#include "Pickups.h"
+
+int playing = 1;
+int quit = 0;
+int fullscreen = 0;
+int points = 0;
+int threshold = 10;
+int maxHP = STARTING_HP;
+
+time_t ticker;
+Timer fps;
+SDL_Event event;
+
+SDL_Surface* screen = NULL;
+SDL_Surface* window = NULL;
+
+SDL_Surface* score = NULL;
+SDL_Surface* bg = NULL;
+SDL_Surface* hpwedge = NULL;
+TTF_Font* font = NULL;
+TTF_Font* font2 = NULL;
+
+Catbug* player;
+Pickup** stuff;
+
+
+int main(int argc, char* args[])
+{
+  if (!init(argc, args))
+  {
+    printf("Init failed\n");
+    return 1;
+  }
+  printf("Init complete\n");
+
+  while (playing)
+  {
+    title();
+    resetGame();
+    while(!quit)
+    {
+      timeStart(&fps);
+      renderBG();
+      drawCatbug(player);
+      moveCatbug(player);
+      managePickups();
+      updateScore();
+      drawHP();
+      interact();
+      frameAdvance();
+      checkHP();
+    }
+  }
+  cleanup();
+  return 0;
+}