katbug/Engine.c

#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");
}