init.cpp

坦克大战3.0源代码

#include "public.h"
/* ----------------------------------- */
void
GameEngine_Init (GameEngine * ge)
{
	Uint32 VideoFlags;
	int SVolume = 128;

	/* Video stuff */
	if (!Video_Init (ge))
	{
		fprintf (stderr, "Can't init video!\n");
		exit (1);
	}

	SDL_WM_SetCaption ("Tank Battle", "Tank");
	SDL_ShowCursor (1);

	ge->swapscreen =
	    SDL_CreateRGBSurface (SDL_SRCALPHA | SDL_HWSURFACE, WIDTH, HEIGHT, BPP,
	                          ge->screen->format->Rmask,
	                          ge->screen->format->Gmask,
	                          ge->screen->format->Bmask,
	                          ge->screen->format->Amask);
	if (ge->swapscreen == NULL)
		fprintf (stderr, "Can't allocate SwapScreen!\n");
	ge->swapscreen = SDL_DisplayFormat (ge->swapscreen);

	SDL_EnableKeyRepeat (0, 0);

	/* Audio stuff */
	////////////////////////////////////////////////////////////

	///-----------------------------------------------
	if (Sound)
	{
		if (Mix_OpenAudio (22050, AUDIO_S16, 1, 256) < 0)
		{
			fprintf (stderr, "Couldn't set 22050 Hz 16-bit audio :%s\n",
			         SDL_GetError ());
			Sound = 0;
		}
	}
	if (Sound)
	{
		/* Allocate 4 channels for mixing */
		//Mix_AllocateChannels (2);
		Mix_Volume (-1, SVolume);
		Snd_bom = Mix_LoadWAV ("./snd/bom.wav");
		Snd_ding = Mix_LoadWAV ("./snd/ding.wav");
		Snd_dow = Mix_LoadWAV ("./snd/dow.wav");
	}

	/* More data init */

	ge->bg1 =
	    SDL_CreateRGBSurface (SDL_SRCALPHA | SDL_HWSURFACE, WIDTH, HEIGHT, BPP,
	                          ge->screen->format->Rmask,
	                          ge->screen->format->Gmask,
	                          ge->screen->format->Bmask,
	                          ge->screen->format->Amask);

	ge->bg2 =
	    SDL_CreateRGBSurface (SDL_SRCALPHA | SDL_HWSURFACE, WIDTH, HEIGHT, BPP,
	                          ge->screen->format->Rmask,
	                          ge->screen->format->Gmask,
	                          ge->screen->format->Bmask,
	                          ge->screen->format->Amask);
	if (ge->bg1 == NULL || ge->bg2 == NULL)
	{
		fprintf (stderr, "Can't allocate SwapScreen!\n");
		Video_Close (ge);
	}

	ge->bg1 = SDL_DisplayFormat (ge->bg1);
	ge->bg2 = SDL_DisplayFormat (ge->bg2);

	ge->tiles = IMG_Load ("pics/tiles.png");
	SDL_SetColorKey (ge->tiles, SDL_SRCCOLORKEY,
	                 SDL_MapRGB (ge->tiles->format, 255, 0, 255));
	ge->tiles = SDL_DisplayFormat (ge->tiles);

	ge->player1 = IMG_Load ("pics/player1.png");
	SDL_SetColorKey (ge->player1, SDL_SRCCOLORKEY,
	                 SDL_MapRGB (ge->player1->format, 255, 0, 255));
	ge->player1 = SDL_DisplayFormat (ge->player1);

	ge->player2 = IMG_Load ("pics/player2.png");
	SDL_SetColorKey (ge->player2, SDL_SRCCOLORKEY,
	                 SDL_MapRGB (ge->player2->format, 255, 0, 255));
	ge->player2 = SDL_DisplayFormat (ge->player2);

	ge->enemys = IMG_Load ("pics/enemys.png");
	SDL_SetColorKey (ge->enemys, SDL_SRCCOLORKEY,
	                 SDL_MapRGB (ge->enemys->format, 255, 0, 255));
	ge->enemys = SDL_DisplayFormat (ge->enemys);

	ge->bullets = IMG_Load ("pics/bullets.png");
	SDL_SetColorKey (ge->bullets, SDL_SRCCOLORKEY,
	                 SDL_MapRGB (ge->bullets->format, 255, 0, 255));
	ge->bullets = SDL_DisplayFormat (ge->bullets);

	ge->explodes = IMG_Load ("pics/explodes.png");
	SDL_SetColorKey (ge->explodes, SDL_SRCCOLORKEY,
	                 SDL_MapRGB (ge->explodes->format, 255, 0, 255));
	ge->explodes = SDL_DisplayFormat (ge->explodes);

	ge->level = 0;
	ge->score[0] = 0;
	ge->score[1] = 0;
}

/* ----------------------------------- */
void
GameEngine_Close (GameEngine * ge)
{
	if (ge->swapscreen != NULL)
		SDL_FreeSurface (ge->swapscreen);
	if (ge->bg1 != NULL)
		SDL_FreeSurface (ge->bg1);
	if (ge->bg2 != NULL)
		SDL_FreeSurface (ge->bg2);
	if (ge->tiles != NULL)
		SDL_FreeSurface (ge->tiles);
	if (ge->player1 != NULL)
		SDL_FreeSurface (ge->player1);
	if (ge->player2 != NULL)
		SDL_FreeSurface (ge->player2);
	if (ge->enemys != NULL)
		SDL_FreeSurface (ge->enemys);
	if (ge->bullets != NULL)
		SDL_FreeSurface (ge->bullets);
	if (ge->explodes != NULL)
		SDL_FreeSurface (ge->explodes);
	if (ge->bigtank != NULL)
		SDL_FreeSurface (ge->bigtank);
	if (Sound)
	{
		Mix_FreeChunk (Snd_bom);
		Mix_FreeChunk (Snd_ding);
		Mix_FreeChunk (Snd_dow);
		Mix_CloseAudio ();
	}
}

/* ----------------------------------- */
int
Video_Init (GameEngine * ge)
{
	Uint32 InitFlags;
	InitFlags = SDL_INIT_VIDEO;
	if (!Sound)
		InitFlags |= SDL_INIT_AUDIO;
	if (SDL_Init (InitFlags) < 0)
	{
		fprintf (stderr, "Can't init SDL:%s\n", SDL_GetError ());
		return FALSE;
	}
	atexit (SDL_Quit);
	Video_Set (ge);
	return TRUE;
}

/* ----------------------------------- */
void
Video_Set (GameEngine * ge)
{
	Uint32 VideoFlags;

	if (ge->FULLSCREEN)
	{
		VideoFlags = SDL_SRCALPHA | SDL_SWSURFACE | SDL_FULLSCREEN;
	}
	else
		VideoFlags = SDL_SRCALPHA | SDL_SWSURFACE;

	if ((ge->screen =
	            SDL_SetVideoMode (WIDTH, HEIGHT, BPP, VideoFlags)) == NULL)
	{
		fprintf (stderr, "Couldn't set %ix%i video mode: %s\n",
		         WIDTH, HEIGHT, SDL_GetError ());
		Video_Close (ge);
		exit (2);
	}
}

/* ----------------------------------- */
void
Video_Reset (GameEngine * ge)
{
	SDL_BlitSurface (ge->screen, NULL, ge->swapscreen, NULL);
	ge->FULLSCREEN = !ge->FULLSCREEN;
	Video_Init (ge);
	SDL_BlitSurface (ge->swapscreen, NULL, ge->screen, NULL);
	SDL_UpdateRect (ge->screen, 0, 0, 0, 0);
}

/* ----------------------------------- */
void
Video_Close (GameEngine * ge)
{
	SDL_Quit ();
}

/* ----------------------------------- */
void
PlaySound (Mix_Chunk * snd)
{
	int Ch;
	if (Sound)
	{
		if (Mix_PlayChannel (-1, snd, 0) < 0)
		{
			Ch = Mix_GroupOldest (-1);
			Mix_HaltChannel (Ch);
			Mix_PlayChannel (Ch, snd, 0);
		}
	}
}

/* ----------------------------------- */
void
ClearUp (GameEngine * ge)
{
	if (ge->swapscreen != NULL)
		SDL_FreeSurface (ge->swapscreen);
	if (ge->bg1 != NULL)
		SDL_FreeSurface (ge->bg1);