IT-HE RPG Engine Code

/*
 *      Media System Initialisation
 *
 *      Start up multimedia devices and input
 */

#include <allegro.h>
#include <string.h>
#include "ithelib.h"
#include "loadfile.h"
#include "console.h"
#include "oscli.h"
#include "media.h"
#include "mouse.h"
#include "sound.h"

// Defines

#define CURSOR_CHAR "_"
#define KBSIZE 2 // Size of keyboard buffer

#ifdef _WIN32
	#define WINDOWS_IS_BROKEN
#endif

// Variables

#ifdef WINDOWS_IS_BROKEN
	BITMAP *screen=NULL;
#endif

BITMAP *swapscreen;
int ire_transparent,ire_nontransparent,ire_bpp,ire_black,ire_bytespp;
unsigned char ire_transparent_r,ire_transparent_g,ire_transparent_b;

static BITMAP *pic;
static BITMAP *oldpic;
//static BITMAP *load_cel(char *filename, RGB *pal);
static char media_on=0,media_clock=0;
static RGB pal[256];
COLOR_MAP light_table;
static RGB_MAP rgb_table;

static int ikeybuf_rptr=0; // Key buffer code
static int ikeybuf_wptr=0;
static int ikeybuf[KBSIZE+1];

static int imousebuf_rptr=0; // Mouse button buffer code
static int imousebuf_wptr=0;
static int imousebuf[KBSIZE+1];

// Functions

extern int gfx_mode_select_ire(int *card, int *bpp);
extern void ire_alert_mode();
extern void RFS_getescape();

static void ChooseMode();
static int rkbuf();
static int rmbuf();

// Code

/*
 * Timer code and it's volatile data
 */

static volatile int ready_for_tick=0;   // Timer clock
static volatile unsigned int ire_uticks=0;
static volatile unsigned int ire_animticks=0;
static volatile unsigned int ire_divisor=0;
static void ire_animation_clock(void)
{
ire_uticks++;
ire_divisor++;
// Divide the animation clock by four
if(ire_divisor >= 4)
	{
	ire_animticks++;
	ready_for_tick=1;
	ire_divisor=0;
	}
}
END_OF_STATIC_FUNCTION(ire_animation_clock)

/*
 * UpdateAnim() - returns true if it's time to update the animations
 */

int UpdateAnim()
{
if(ready_for_tick)
	{
	ready_for_tick = 0;
	return 1;
	}
return 0;
}
END_OF_STATIC_FUNCTION(UpdateAnim)


unsigned int GetIREClock()
{
return ire_uticks;
}

void ResetIREClock()
{
ire_uticks=0;

if(in_editor)
	return;
// Sync animation clock
ready_for_tick=0;
ire_divisor=0;
ire_animticks=0;
}

unsigned int GetAnimClock()
{
return ire_animticks;
}

//
//  Core media initialisation
//

void init_media(int game)
{
int r;

if(media_on)
	return;
media_on=1;

ilog_printf("Starting up:\n");

ilog_printf("  Keyboard: ");
if(!install_keyboard())
	ilog_printf("OK\n");
else
	{
	ilog_printf("FAILED\n");
	ilog_printf("%s\n",allegro_error);
	exit(1);
	}

if(game && !debug_nosound)
	{
	ilog_printf("  Sound: ");
	if(S_Init())
		ilog_printf("OK\n");
	else
		ilog_printf("FAILED\n");
	}


// Set allegro panic button

if(allow_breakout)
	three_finger_flag=1;
else
	three_finger_flag=0;

ilog_printf("  Timer: ");
if(install_timer() != -1)
	ilog_printf("OK\n");
else
	{
	ilog_printf("FAILED\n");
	ilog_printf("%s\n",allegro_error);
	exit(1);
	}

ilog_printf("  Mouse: ");
if(install_mouse() != -1)
	ilog_printf("OK\n");
else
	{
	ilog_printf("FAILED\n");
	ilog_printf("%s\n",allegro_error);
	exit(1);
	}

ilog_printf("  Video:\n");

switch(VideoMode)
	{

	// Windowed mode

	case -2:

	// Get colour depth
	ire_bpp = desktop_color_depth();

	// Work out bytes per pixel
	ire_bytespp=ire_bpp/8;
	if(ire_bpp==15)
		ire_bytespp=2; // hack for 15bpp

	// Set it up..
	set_color_depth(ire_bpp);
	set_color_conversion(COLORCONV_TOTAL);

	if(set_gfx_mode(GFX_AUTODETECT_WINDOWED, 640, 480, 0, 0))
		ChooseMode();
	break;

	// Supported video depths (fullscreen)

	case 8:
	case 15:
	case 16:
	case 24:
	case 32:
	ire_bpp=VideoMode;

	// Work out bytes per pixel
	ire_bytespp=ire_bpp/8;
	if(ire_bpp==15)
		ire_bytespp=2; // hack for 15bpp

	set_color_depth(ire_bpp);
	set_color_conversion(COLORCONV_TOTAL);
	if(set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0))
		ChooseMode();
	break;

	// Anything we don't understand

	default:
	ChooseMode();
	break;
	}

#ifdef WINDOWS_IS_BROKEN
	ilog_quiet("  Attempting to fix windows bug\n");
	screen = create_video_bitmap(640,480);
#endif

ilog_quiet("  Palette\n");

if(ire_bpp == 8)
	{
	for(r=0;r<256;r++)
		{
		pal[r].r = r>>2;
		pal[r].g = r>>2;
		pal[r].b = r>>2;
//		pal[r].r|=4; // stop it being 0
		}
	// Purple transparent

	pal[0].r = 0;
	pal[0].g = 0;
	pal[0].b = 0;

	}
else
	generate_332_palette(pal);

set_palette(pal);
ilog_quiet("Primary media init succesful\n");
ilog_printf("\n");
}

//
//  Secondary media initialisation
//

void init_enginemedia()
{
int r,g,b,sum;
char picpath[1024];
	
ilog_quiet("  Video:\n");
ilog_quiet("  RGBtab\n");


ilog_quiet("  RGBtab\n");

if(ire_bpp == 8)
	{
	// Make a greyscale translation table for 8bpp mode
	for(r=0;r<32;r++)
		for(g=0;g<32;g++)
			for(b=0;b<32;b++)
				{
				sum=((r<<3)+(g<<3)+(b<<3))/3;
/*
				if(sum == 0 && r+g+b>0)
					sum = 1;
*/
				rgb_table.data[r][g][b]=sum;
				}
	}
else
	create_rgb_table(&rgb_table,pal,NULL); // proper translation table

// Use it, whichever it is
rgb_map=&rgb_table;

ilog_quiet("  Light tab\n");
create_light_table(&light_table,pal,0,0,0,NULL);
color_map=&light_table;

ilog_quiet("  Transparency\n");

if(ire_bpp == 8)
	{
	ire_transparent = 0;
	ire_black = 1;
	}
else
	{
	ire_transparent = makecol(255,0,255);
	ire_black = makecol(0,0,0);
	}

ire_transparent_r = getr(ire_transparent);
ire_transparent_g = getg(ire_transparent);
ire_transparent_b = getb(ire_transparent);


ilog_quiet("  Text mode\n");

clear_to_color(screen,ire_black);

swapscreen=MakeScreen(640,480);
if(!swapscreen)
	{
	allegro_exit();
	ilog_quiet("Can't create swapscreen\n");
	printf("Can't create swapscreen\n");
	exit(1);
	}

oldpic=MakeScreen(640,480);
if(!oldpic)
	{
	allegro_exit();
	ilog_quiet("Can't create save/restore bitmap\n");
	printf("Can't create save/restore bitmap\n");
	exit(1);
	}



if(loadingpic[0] == 0)
	{
	// None specified
	clear_to_color(swapscreen,ire_black);
	Show();
	}
else
	{
	loadfile(loadingpic,picpath);
	pic = iload_bitmap(picpath);
	if(!pic)
		{
		ilog_quiet("  Oh dear\n");
		allegro_exit();
		ilog_quiet("Can't load backing picture '%s'\n",picpath);
		printf("Can't load backing picture '%s'\n",picpath);
		exit(1);
		}
	clear_to_color(swapscreen,ire_black);
	masked_blit(pic,swapscreen,0,0,0,0,640,480);
	Show();
	destroy_bitmap(pic);
	}

ilog_quiet("  Start console\n");
irecon_init(logx,logy,80,loglen);

set_trans_blender(0, 0, 0, 128);

ilog_quiet("  Locks\n");

// Ok, let's do the timer stuff now
// Lock these when in DOS to prevent a horrible crash

LOCK_FUNCTION(ire_animation_clock);
LOCK_FUNCTION(UpdateAnim); // Not strictly necessary
LOCK_VARIABLE(ready_for_tick);
LOCK_VARIABLE(ire_uticks);

media_clock=0;
// Ok, let's do it
ilog_quiet("  Clock: ");
if(!install_int_ex(ire_animation_clock,BPS_TO_TIMER(140))) // 35
	ilog_quiet("Ok\n");
else
	{
	ilog_quiet("Failed: %s\n",allegro_error);
	readkey();
	exit(1);
	}
media_clock=1;

ilog_quiet("Media INIT successful\n");
}

void term_media()
{
if(!media_on)
	{
	ilog_quiet("Media not active, can't shut down\n");
	return;
	}
media_on=0;

ilog_quiet("Shut down Media:\n");

ilog_quiet("  Clock:\n");
if(media_clock)
	{
	remove_int(ire_animation_clock);
	media_clock=0;
	}

ilog_quiet("  Gfx:\n");
KillGFX();

ilog_quiet("  Keyboard:\n");
remove_keyboard();

ilog_quiet("  Allegro:\n");
//allegro_exit();

S_Term();

ilog_quiet("Media shutdown completed\n");
}

int sizeof_sprite(BITMAP *bmp)
{
int cd=0;

switch(bitmap_color_depth(bmp))
	{
	case 8:
	cd=1;
	break;

	case 15:
	case 16:
	cd=2;
	break;

	case 24:
	cd=3;
	break;

	case 32:
	cd=4;
	break;

	default:
	ithe_panic("Unknown colour depth in object",NULL);
	break;
	};

return bmp->w*bmp->h*cd;
}



/*
 *      Get a key, if one is pending, else return 0
 */

int GetKey()
{
return rkbuf()>>8;
}

int GetMouseButton()
{
return rmbuf();
}

/*
 *      Wait for a key
 */

unsigned char WaitForKey()
{
int k;
do
	{
	k = rkbuf();
//	S_PollMusic();

	// look for a mouse click?

	poll_mouse();
	CheckMouseRanges();
	if(MouseID != -1)
		{
		return KEY_MAX+1; // Not a valid key, a mouse click
		}

	} while(!k);

return k>>8;
}

unsigned char WaitForAscii()
{
int k;
do
	{
	k = rkbuf();
//	S_PollMusic();
	} while(!k);

return k&0xff;
}

void FlushKeys()
{
clear_keybuf();
ikeybuf_rptr=0;
ikeybuf_wptr=0;
memset(ikeybuf,0,sizeof(ikeybuf));
}

// This is a ring buffer, not a stack

int rkbuf()
{
int k;

// Take key from buffer if necessary
rest(0);
poll_keyboard();
if(!keypressed())
	{
	k = ikeybuf[ikeybuf_rptr];
	if(!k)
		{
		return k; // Abort if nothing is there
		}
	ikeybuf[ikeybuf_rptr++]=0;
	// Wrap the buffer around if we go too far
	if(ikeybuf_rptr>=KBSIZE)
		ikeybuf_rptr=0;
	return k;
	}

// Fill the buffer

while(keypressed())
	{
	poll_keyboard();
	if(ikeybuf[ikeybuf_wptr]) // It's full.
		{
		clear_keybuf();
		}
	else
		{
		ikeybuf[ikeybuf_wptr]=readkey();
		if(key_shifts & KEY_LSHIFT)
			ikeybuf[ikeybuf_wptr] |= 0x8000;		// High bit is for SHIFT
		ikeybuf_wptr++;
		if(ikeybuf_wptr>=KBSIZE)
			{
			ikeybuf_wptr=0;
			}
		}
	};

k = ikeybuf[ikeybuf_rptr];
ikeybuf[ikeybuf_rptr++]=0;
if(ikeybuf_rptr>=KBSIZE)
	{
	ikeybuf_rptr=0;
	}

return k;
}


// Buffered mouse button code..

int rmbuf()
{
int k;

// Take key from buffer if necessary
poll_mouse();
if(!mouse_b)
	{
	k = imousebuf[imousebuf_rptr];
	if(!k)
		{
		return k; // Abort if nothing is there
		}
	imousebuf[imousebuf_rptr++]=0;
	// Wrap the buffer around if we go too far
	if(imousebuf_rptr>=KBSIZE)
		{
		imousebuf_rptr=0;
		}
	return k;
	}

// Fill the buffer

while(mouse_b)
	{
	poll_mouse();
	if(imousebuf[imousebuf_wptr]) // It's full.
		{
		mouse_b=0; // Smash The Man
		}
	else
		{
		imousebuf[imousebuf_wptr]=mouse_b;
		imousebuf_wptr++;
		if(imousebuf_wptr>=KBSIZE)
			{
			imousebuf_wptr=0;
			}
		}
	};

k = imousebuf[imousebuf_rptr];
imousebuf[imousebuf_rptr++]=0;
if(imousebuf_rptr>=KBSIZE)
	{
	imousebuf_rptr=0;
	}

return k;
}

/*
 *      Plot - draw the little row of dots
 *
 *             Call Plot(number); to set the maximum length of the row
 *             Then call Plot(0); each cycle of the loop to draw a dot
 */


void Plot(int max)
{
static int mpos,ctr=0;
ctr++;
if(max)
	{
	mpos=max/40;
	if(mpos<1)
		mpos=1;
	ctr=0;
	}
if(ctr>mpos)
	{
	ilog_printf(".");
	ctr=0;
	}
}


/*
 *      BMPShot - Take a screenshot in .BMP format
 */

void BMPshot()
{
char name[256];
int ctr=0;

do
	{
	sprintf(name,"ire%05d.bmp",ctr++);
	} while(!access(name,F_OK));

// Create file or bail out

save_bitmap(name,swapscreen,pal);
}

void ChooseMode()
{
int card,ok;

// Choose sensible default BPP

#ifdef __DJGPP__
ire_bpp = 16;
#else
ire_bpp = desktop_color_depth();
#endif

set_gfx_mode(GFX_SAFE, 320, 200, 0, 0);
generate_332_palette(pal);
set_palette(pal);

do  {
	ok=0;
	if (!gfx_mode_select_ire(&card, &ire_bpp))
		{
		allegro_exit();
		exit(1);
		}

	set_color_depth(ire_bpp);
	set_color_conversion(COLORCONV_TOTAL);

	if(!set_gfx_mode(card, 640, 480, 0, 0))
		ok=1;
	else
		{
		set_color_depth(8);
		set_gfx_mode(GFX_SAFE, 320, 200, 0, 0);
		generate_332_palette(pal);
		set_palette(pal);
		ire_alert_mode();
		}
	} while(!ok);
}


/*
 *      Get a string
 */

int GetStringInput(char *ptr,int len)
{
int input=0;
int bufpos=0;
char buf[128];

strcpy(buf,ptr);
bufpos=strlen(buf);
buf[bufpos]=0;
do  {
	irecon_clearline();
	if(buf[0] != 0)
		irecon_print(buf);         // Printing an empty line makes a newline
	irecon_print(CURSOR_CHAR);
	irecon_update();
	Show();
	if(keypressed())
		{
		input = readkey();
		if((input>>8) == KEY_F10)
			BMPshot();
		if((input&0xff) >= ' ' && (input&0xff) <= 'z')
			{
			if(bufpos<conwid && bufpos<len)
				{
				buf[bufpos++]=input&0xff;
				buf[bufpos]=0;
				}
			}
		if((input>>8) == KEY_DEL || (input>>8) == KEY_BACKSPACE)
			if(bufpos>0)
				{
				bufpos--;
				buf[bufpos]=0;
				}
		}
	else
		input=0;
	} while((input>>8) != KEY_ESC && (input>>8) != KEY_ENTER);
	irecon_clearline();
irecon_print(buf);
irecon_print("\n");
if((input>>8) == KEY_ESC)
	return 0;
strcpy(ptr,buf);
return 1;
}

BITMAP *MakeScreen(int w, int h)
{
if(use_hw_video)
	if(gfx_capabilities&GFX_HW_VRAM_BLIT_MASKED)
		return create_video_bitmap(w, h);

return create_bitmap(w,h);

//return screen;
}


void SaveScreen()
{
blit(swapscreen,oldpic,0,0,0,0,640,480);
}

void RestoreScreen()
{
blit(oldpic,swapscreen,0,0,0,0,640,480);
}