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GELIB.C
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/* Catacomb Abyss Source Code
* Copyright (C) 1993-2014 Flat Rock Software
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <dos.h>
#include <conio.h>
#include <stdio.h>
#include <dir.h>
#include "mem.h"
#include "string.h"
#include "time.h"
#include "stdarg.h"
#include "io.h"
#include "DEF.H"
#include "gelib.h"
#define MAX_GAMELIST_NAMES 20
#define FNAME_LEN 9
////////////////////////////////////////////////////////////////////////////
//
// Global variables
//
boolean InLoadSaveGame = false;
//AudioDeviceType ge_DigiMode;
boolean ConserveMemory = false;
char GameListNames[MAX_GAMELIST_NAMES+1][FNAME_LEN],current_disk=1;
short NumGames;
short PPT_LeftEdge=0,PPT_RightEdge=320;
boolean LeaveDriveOn=false,ge_textmode=true;
char Filename[FILENAME_LEN+1], ID[sizeof(GAMENAME)], VER[sizeof(SAVEVER_DATA)];
////////////////////////////////////////////////////////////////////////////
//
// CalibrateJoystick()
//
void CalibrateJoystick(short joynum)
{
word minx,maxx,
miny,maxy;
IN_ClearKeysDown();
VW_HideCursor();
VW_FixRefreshBuffer();
CenterWindow(30,8);
US_Print("\n");
US_CPrintLine("Move joystick to the upper-left");
US_CPrintLine("and press one of the buttons.");
VW_UpdateScreen();
while ((LastScan != sc_Escape) && !IN_GetJoyButtonsDB(joynum));
if (LastScan == sc_Escape)
return;
IN_GetJoyAbs(joynum,&minx,&miny);
while (IN_GetJoyButtonsDB(joynum));
US_Print("\n");
US_CPrintLine("Move joystick to the lower-right");
US_CPrintLine("and press one of the buttons.");
VW_UpdateScreen();
while ((LastScan != sc_Escape) && !IN_GetJoyButtonsDB(joynum));
if (LastScan == sc_Escape)
return;
IN_GetJoyAbs(joynum,&maxx,&maxy);
if ((minx == maxx) && (miny == maxy))
return;
IN_SetupJoy(joynum,minx,maxx,miny,maxy);
while (IN_GetJoyButtonsDB(joynum));
if (LastScan)
IN_ClearKeysDown();
JoystickCalibrated = true;
}
////////////////////////////////////////////////////////////////////////////
//
// WaitKeyVBL()
//
void WaitKeyVBL(short key, short vbls)
{
while (vbls--)
{
VW_WaitVBL(1);
IN_ReadControl(0,&control);
if ((control.button0|control.button1)||(Keyboard[key]))
break;
}
}
////////////////////////////////////////////////////////////////////////////
//
// MoveScreen()
//
// panadjust must be saved and restored if MoveScreen is being called from
// inside a level.
//
void MoveScreen(short x, short y)
{
unsigned address;
address = (y*linewidth)+(x/8);
VW_SetScreen(address,0);
bufferofs = displayofs = address;
panadjust=0;
}
////////////////////////////////////////////////////////////////////////////
//
// MoveGfxDst()
//
void MoveGfxDst(short x, short y)
{
unsigned address;
address = (y*linewidth)+(x/8);
bufferofs = displayofs = address;
}
#if 0
#if GRAPHIC_PIRATE
///////////////////////////////////////////////////////////////////////////
//
// DoPiracy() - Graphics piracy code...
//
void DoPiracy()
{
struct Shape Pirate1Shp;
struct Shape Pirate2Shp;
VW_SetScreenMode (EGA320GR);
VW_ClearVideo(BLACK);
// Load shapes...
//
if (LoadShape("PIRATE1E."EXT,&Pirate1Shp))
TrashProg("Can't load PIRATE1E.BIO");
if (LoadShape("PIRATE2E."EXT,&Pirate2Shp))
TrashProg("Can't load PIRATE2E.BIO");
// Deal with shapes...
//
VW_SetLineWidth(40);
VW_FadeOut();
MoveScreen(0,0);
UnpackEGAShapeToScreen(&Pirate1Shp,(linewidth-Pirate1Shp.BPR)<<2,0);
MoveScreen(0,200);
UnpackEGAShapeToScreen(&Pirate2Shp,(linewidth-Pirate2Shp.BPR)<<2,0);
MoveScreen(0,0);
VW_FadeIn();
WaitKeyVBL(57,200);
while (Keyboard[57]);
SD_PlaySound(GOOD_PICKSND);
MoveScreen(0,200);
WaitKeyVBL(57,300);
while (Keyboard[57]);
VW_FadeOut();
FreeShape(&Pirate1Shp);
FreeShape(&Pirate2Shp);
}
#else
///////////////////////////////////////////////////////////////////////////
//
// DoPiracy() - Text-based piracy code...
//
void DoPiracy()
{
}
#endif
#endif
//--------------------------------------------------------------------------
// PrintPropText()
//--------------------------------------------------------------------------
// THE FOLLOWING MUST BE INITIALIZED BEFORE CALLING THIS ROUTINE:
//
// WindowX, WindowW, PrintY - These are ID global variables and are
// automatically initialized when using their window routines.
//
// WindowX is the left edge of the window.
// WindowW is the width of the window.
// PrintY is the top edge of the window area.
//
// All values are represented in unshifted pixels.
// PPT_LeftEdge, PPT_RightEdge - These are globals used by PrintPropText().
// They define the left and right edge of the text area in pixels.
void PrintPropText(char far *text)
{
#define RETURN_CHAR '\n'
char pb[200];
fontstruct _seg *font = (fontstruct _seg *)grsegs[STARTFONT];
char savech;
short length,maxend,maxx,loop,curx;
boolean centerit,lastcharcr;
while (*text)
{
if (*text == '^')
centerit=true,text++;
else
centerit=false;
/* Search forward for the last possible character in the line. This
** character is: 1) RETURN (end of line) 2) ZERO (end of buffer)
** and 3) the character at "WP->vWidth" bytes from the start of the line.
*/
curx=PPT_LeftEdge;
length=0;
while ((curx+font->width[text[length+1]] < PPT_RightEdge) &&
(text[length]) &&
(text[length] != RETURN_CHAR))
curx+=font->width[text[length++]];
/* Search backward from the point we just found for a SPACE (for word
** wrapping).
*/
if ((text[length]) && (text[length] != RETURN_CHAR))
{
maxx = curx;
maxend = length;
while ((length) && (text[length] != ' '))
curx-=font->width[text[length--]];
/* Were there any SPACES on this line? If not, take the MAX!
*/
if (!length)
length=maxend,curx=maxx;
}
/* If we can, lets keep the SPACE or RETURN that follows a line at
** the end of that line.
*/
if (((text[length] == ' ') || (text[length] == RETURN_CHAR)) && (length < PPT_RightEdge))
length++;
// All of this is kludged to work with ID _Print routines...
//
savech=text[length];
text[length]=0;
if (text[length-1] == RETURN_CHAR)
{
lastcharcr=true;
text[length-1]=0;
}
else
lastcharcr=false;
_fmemcpy(pb,text,length+1);
if (centerit)
{
US_CPrintLine(pb);
}
else
{
PrintX = PPT_LeftEdge;
US_Print(pb);
US_Print("\n");
}
if (lastcharcr)
text[length-1]=RETURN_CHAR;
text[length]=savech;
//
// end of ID _Print kludge...
text += length;
}
}
////////////////////////////////////////////////////////////////////////////
//
// DisplayText()
//
void DisplayText(textinfo *textinfo)
{
#define PAGE_WIDTH 78
int loop, PageNum, LastNum,num;
boolean InHelp = true,faded_in = false;
unsigned holddisp,holdpan,holdbuffer,holdaddress;
// Can you believe it takes all this just to change to 640 mode!!???!
//
VW_ScreenToScreen(0,FREESTART-STATUSLEN,40,80);
VW_SetLineWidth(80);
MoveScreen(0,0);
VW_Bar (0,0,640,200,0);
VW_SetScreenMode(EGA640GR);
VW_SetLineWidth(80);
BlackPalette();
// Now, let's display some text...
//
PPT_RightEdge=PAGE_WIDTH*8;
PPT_LeftEdge=16;
PrintY= 30;
WindowX=WindowY=0;
LastNum = -1;
PageNum = 1;
while (InHelp)
{
// Display new page of text.
//
if (PageNum != LastNum)
{
US_DrawWindow(1,1,PAGE_WIDTH,23);
PrintPropText(textinfo->pages[PageNum-1]);
LastNum = PageNum;
}
VW_UpdateScreen();
if (!faded_in)
{
VW_FadeIn();
faded_in = true;
}
// Scroll through text / exit.
//
IN_ReadControl(0,&control);
if (control.button1 || Keyboard[1])
InHelp=false;
else
{
if (ControlTypeUsed != ctrl_Keyboard)
control.dir = dir_None;
if (((control.dir == dir_North) || (control.dir == dir_West)) && (PageNum > 1))
{
PageNum--;
while ((control.dir == dir_North) || (control.dir == dir_West))
IN_ReadControl(0,&control);
}
else
if (((control.dir == dir_South) || (control.dir == dir_East)) && (PageNum < textinfo->totalpages))
{
PageNum++;
while ((control.dir == dir_South) || (control.dir == dir_East))
IN_ReadControl(0,&control);
}
}
}
// Wait for 'exit key' to be released.
//
while (control.button1 || Keyboard[1])
IN_ReadControl(0,&control);
// Can you believe it takes all this just to change to 320 mode!!???!
//
VW_FadeOut();
VW_SetLineWidth(40);
MoveScreen(0,0);
VW_Bar (0,0,320,200,0);
VW_SetScreenMode(EGA320GR);
BlackPalette();
VW_ScreenToScreen(FREESTART-STATUSLEN,0,40,80);
}
//--------------------------------------------------------------------------
// BlackPalette()
//--------------------------------------------------------------------------
void BlackPalette()
{
extern char colors[7][17];
_ES=FP_SEG(&colors[0]);
_DX=FP_OFF(&colors[0]);
_AX=0x1002;
geninterrupt(0x10);
screenfaded = true;
}
//--------------------------------------------------------------------------
// ColoredPalette()
//--------------------------------------------------------------------------
void ColoredPalette()
{
extern char colors[7][17];
_ES=FP_SEG(&colors[3]);
_DX=FP_OFF(&colors[3]);
_AX=0x1002;
geninterrupt(0x10);
screenfaded = false;
}
////////////////////////////////////////////////////////////////////////////
//
// Verify()
//
long Verify(char *filename)
{
int handle;
long size;
if ((handle=open(filename,O_BINARY))==-1)
return (0);
size=filelength(handle);
close(handle);
return(size);
}
///////////////////////////////////////////////////////////////////////////
//
// GE_SaveGame
//
// Handles user i/o for saving a game
//
///////////////////////////////////////////////////////////////////////////
void GE_SaveGame()
{
boolean GettingFilename=true;
char drive;
// char Filename[FILENAME_LEN+1],drive; //, ID[sizeof(GAMENAME)], VER[sizeof(SAVEVER_DATA)];
int handle;
struct dfree dfree;
long davail;
VW_FixRefreshBuffer();
ReadGameList();
while (GettingFilename)
{
DisplayGameList(2,7,3,10);
US_DrawWindow(5,1,30,3);
memset(Filename,0,sizeof(Filename));
US_CPrint("Enter name to SAVE this game:");
VW_UpdateScreen();
if (screenfaded)
VW_FadeIn();
if (!US_LineInput((linewidth<<2)-32,20,Filename,"",true,8,0))
goto EXIT_FUNC;
if (!strlen(Filename))
goto EXIT_FUNC;
drive = getdisk();
getdfree(drive+1,&dfree);
davail = (long)dfree.df_avail*(long)dfree.df_bsec*(long)dfree.df_sclus;
if (davail < 10000l)
{
char status[40] = "\nDrive: Free: ";
US_CenterWindow(30,6);
US_Print("\n");
US_CPrintLine("Disk Full: Can't save game.");
US_CPrintLine("Try inserting another disk.");
status[8] = drive+'A';
itoa(davail,&status[18],10);
US_CPrint(status);
VW_UpdateScreen();
IN_Ack();
}
else
{
strcat(Filename,".SAV");
GettingFilename = false;
if (Verify(Filename)) // FILE EXISTS
{
US_CenterWindow(22,4);
US_CPrintLine("That file already exists...");
US_CPrintLine("Overwrite it ????");
US_CPrintLine("(Y)es or (N)o?");
VW_UpdateScreen();
while((!Keyboard[21]) && (!Keyboard[49]) && !Keyboard[27]);
if (Keyboard[27])
goto EXIT_FUNC;
if (Keyboard[49])
{
GettingFilename = true;
VW_UpdateScreen();
}
}
}
}
handle = open(Filename,O_RDWR|O_CREAT|O_BINARY,S_IREAD|S_IWRITE);
if (handle==-1)
goto EXIT_FUNC;
if ((!CA_FarWrite(handle,(void far *)GAMENAME,sizeof(GAMENAME))) || (!CA_FarWrite(handle,(void far *)SAVEVER_DATA,sizeof(SAVEVER_DATA))))
{
if (!screenfaded)
VW_FadeOut();
return;
}
if (!USL_SaveGame(handle))
Quit("Save game error");
EXIT_FUNC:;
if (handle!=-1)
close(handle);
if (handle==-1)
{
remove(Filename);
US_CenterWindow(22,6);
US_CPrintLine("DISK ERROR");
US_CPrintLine("Check: Write protect...");
US_CPrintLine("File name...");
US_CPrintLine("Bytes free on disk...");
US_CPrintLine("Press SPACE to continue.");
VW_UpdateScreen();
while (!Keyboard[57]);
while (Keyboard[57]);
}
while (Keyboard[1]);
if (!screenfaded)
VW_FadeOut();
}
///////////////////////////////////////////////////////////////////////////
//
// GE_LoadGame
//
// Handles user i/o for loading a game
//
///////////////////////////////////////////////////////////////////////////
boolean GE_LoadGame()
{
boolean GettingFilename=true,rt_code=false;
int handle;
IN_ClearKeysDown();
memset(ID,0,sizeof(ID));
memset(VER,0,sizeof(VER));
VW_FixRefreshBuffer();
ReadGameList();
while (GettingFilename)
{
DisplayGameList(2,7,3,10);
US_DrawWindow(5,1,30,3);
memset(Filename,0,sizeof(Filename));
US_CPrint("Enter name of game to RESTORE:");
VW_UpdateScreen();
if (screenfaded)
VW_FadeIn();
if (!US_LineInput((linewidth<<2)-32,20,Filename,"",true,8,0))
goto EXIT_FUNC;
strcat(Filename,".SAV");
GettingFilename = false;
if (!Verify(Filename)) // FILE DOESN'T EXIST
{
US_CenterWindow(22,3);
US_CPrintLine(" That file doesn't exist....");
US_CPrintLine("Press SPACE to try again.");
VW_UpdateScreen();
while (!Keyboard[57]);
while (Keyboard[57]);
GettingFilename = true;
}
}
handle = open(Filename,O_RDWR|O_BINARY);
if (handle==-1)
goto EXIT_FUNC;
if ((!CA_FarRead(handle,(void far *)&ID,sizeof(ID))) || (!CA_FarRead(handle,(void far *)&VER,sizeof(VER))))
return(false);
if ((strcmp(ID,GAMENAME)) || (strcmp(VER,SAVEVER_DATA)))
{
US_CenterWindow(32,4);
US_CPrintLine("That isn't a "GAMENAME);
US_CPrintLine(".SAV file.");
US_CPrintLine("Press SPACE to continue.");
VW_UpdateScreen();
while (!Keyboard[57]);
while (Keyboard[57]);
if (!screenfaded)
VW_FadeOut();
return(false);
}
if (!USL_LoadGame(handle))
Quit("Load game error.");
rt_code = true;
EXIT_FUNC:;
if (handle==-1)
{
US_CenterWindow(22,3);
US_CPrintLine("DISK ERROR ** LOAD **");
US_CPrintLine("Press SPACE to continue.");
while (!Keyboard[57]);
while (Keyboard[57]);
}
else
close(handle);
if (!screenfaded)
VW_FadeOut();
return(rt_code);
}
///////////////////////////////////////////////////////////////////////////
//
// GE_HardError() - Handles the Abort/Retry/Fail sort of errors passed
// from DOS. Hard coded to ignore if during Load/Save Game.
//
///////////////////////////////////////////////////////////////////////////
#pragma warn -par
#pragma warn -rch
int GE_HardError(word errval,int ax,int bp,int si)
{
#define IGNORE 0
#define RETRY 1
#define ABORT 2
extern void ShutdownId(void);
static char buf[32];
static WindowRec wr;
static boolean oldleavedriveon;
int di;
char c,*s,*t;
boolean holdscreenfaded;
if (InLoadSaveGame)
hardresume(IGNORE);
di = _DI;
oldleavedriveon = LeaveDriveOn;
LeaveDriveOn = false;
if (ax < 0)
s = "Device Error";
else
{
if ((di & 0x00ff) == 0)
s = "Drive ~ is Write Protected";
else
s = "Error on Drive ~";
for (t = buf;*s;s++,t++) // Can't use sprintf()
if ((*t = *s) == '~')
*t = (ax & 0x00ff) + 'A';
*t = '\0';
s = buf;
}
c = peekb(0x40,0x49); // Get the current screen mode
if ((c < 4) || (c == 7))
goto oh_kill_me;
// DEBUG - handle screen cleanup
holdscreenfaded=screenfaded;
US_SaveWindow(&wr);
VW_ClearVideo(0); ////////////// added for exiting
US_CenterWindow(30,3);
US_CPrint(s);
US_CPrint("(R)etry or (A)bort?");
VW_UpdateScreen();
if (holdscreenfaded)
VW_FadeIn();
IN_ClearKeysDown();
asm sti // Let the keyboard interrupts come through
while (true)
{
switch (IN_WaitForASCII())
{
case key_Escape:
case 'a':
case 'A':
goto oh_kill_me;
break;
case key_Return:
case key_Space:
case 'r':
case 'R':
if (holdscreenfaded)
VW_FadeOut();
US_ClearWindow();
VW_UpdateScreen();
US_RestoreWindow(&wr);
LeaveDriveOn = oldleavedriveon;
return(RETRY);
break;
}
}
oh_kill_me:
abortprogram = s;
TrashProg("Terminal Error: %s\n",s);
// if (tedlevel)
// fprintf(stderr,"You launched from TED. I suggest that you reboot...\n");
return(ABORT);
#undef IGNORE
#undef RETRY
#undef ABORT
}
#pragma warn +par
#pragma warn +rch
//--------------------------------------------------------------------------
//
//
// B O B ROUTINES
//
//
//--------------------------------------------------------------------------
#ifdef BOBLIST
////////////////////////////////////////////////////////////////////////////
//
// UpdateBOBList() - Adds a sprite to an objects BOBlist. The BOB List
// must already be allocated and have an available slot.
//
// RETURNS : true = Success adding Sprite / false = Failure.
//
// NOTE : This also sets the users 'needtoreact' flag to true.
//
boolean UpdateBOBList(objtype *obj,struct Simple_Shape *Shape,shapeclass Class, short priority, spriteflags sprflags)
{
struct BOB_Shape *CurBOBShape = NULL;
#pragma warn -pia
if (CurBOBShape = obj->nextshape)
{
// Treverse down BOBList looking for a sprite with the same class
// OR an empty shape struct to store the new shape.
while ((CurBOBShape->class != Class) && (CurBOBShape->class) && CurBOBShape)
{
CurBOBShape = CurBOBShape->nextshape;
}
if (CurBOBShape)
{
RF_RemoveSprite(&CurBOBShape->sprite);
CurBOBShape->shapenum = Shape->shapenum;
CurBOBShape->x_offset = Shape->x_offset;
CurBOBShape->y_offset = Shape->y_offset;
CurBOBShape->priority = priority;
CurBOBShape->sprflags = sprflags;
CurBOBShape->class = Class;
return(true);
}
}
return(false);
#pragma warn +pia
}
/////////////////////////////////////////////////////////////////////////////
//
// RemoveBOBShape() - Removes a sprite from a BOBList.
//
// RETURNS : true = Success / false = Failure (shape not found)
//
boolean RemoveBOBShape(objtype *obj, shapeclass Class)
{
struct BOB_Shape *CurBOBShape = NULL;
#pragma warn -pia
if (CurBOBShape = obj->nextshape)
{
while ((CurBOBShape->class != Class) && (!CurBOBShape->class) && CurBOBShape)
{
CurBOBShape = CurBOBShape->nextshape;
}
if (CurBOBShape)
{
CurBOBShape->class = noshape;
return(true);
}
}
return(false);
#pragma warn +pia
}
/////////////////////////////////////////////////////////////////////////////
//
// RemoveBOBList() - Removes an entire BOBList attached to an object.
//
//
void RemoveBOBList(objtype *obj)
{
struct BOB_Shape *CurBOBShape;
#pragma warn -pia
if (CurBOBShape = obj->nextshape)
{
// Treverse down BOBList looking for a sprite with the same class
// OR an empty shape struct to store the new shape.
while (CurBOBShape)
{
if (CurBOBShape->class)
{
CurBOBShape->class = noshape;
RF_RemoveSprite (&CurBOBShape->sprite);
}
CurBOBShape = CurBOBShape->nextshape;
}
}
#pragma warn +pia
}
/////////////////////////////////////////////////////////////////////////////
//
// InitBOBList() -- This initializes a BOB list for all the possible shapes
// attached at one time. This is done with an array of
// BOB_Shape structs and links the 'nextshape' pointer to
// to the next element.
//
//
void InitBOBList(objtype *obj, struct BOB_Shape *BOB_Shape, short NumElements)
{
struct BOB_Shape *CurShape;
short loop;
obj->nextshape = BOB_Shape;
for (loop=1;loop<NumElements;loop++)
{
CurShape = BOB_Shape++;
CurShape->nextshape = BOB_Shape;
}
BOB_Shape->nextshape = NULL;
}
////////////////////////////////////////////////////////////////////////////
//
// RefreshBOBList() -- This routine updates all sprites attached to the
// BOBList and refreshes there position in the sprite
// list.
//
void RefreshBOBList(objtype *obj)
{
struct BOB_Shape *Shape;
Shape = obj->nextshape;
while (Shape)
{
if (Shape->class)
RF_PlaceSprite(&Shape->sprite,obj->x+Shape->x_offset,obj->y+Shape->y_offset, Shape->shapenum, spritedraw,Shape->priority,Shape->sprflags);
Shape = Shape->nextshape;
}
}
#endif
//==========================================================================
// JAMPAK routines
//==========================================================================
#define N 4096
#define F 18
// THRESHOLD : encode string into position and length if match_length is
// greater than this
#define THRESHOLD 2
// index for root of binary search trees
//
#define NIL N
#define COMP "COMP"
unsigned long textsize = 0, // text size counter
codesize = 0, // code size counter
printcount = 0; // counter for reporting progress every 1K bytes
unsigned char far text_buf[N + F - 1];
memptr segptr;
BufferedIO lzwBIO;
//--------------------------------------------------------------------------
// BLoad()
//--------------------------------------------------------------------------
unsigned long BLoad(char *SourceFile, memptr *DstPtr)
{
int handle;
memptr SrcPtr;
longword i, j, k, r, c;
word flags;
byte Buffer[8];
longword DstLen, SrcLen;
boolean comp;
if ((handle = open(SourceFile, O_RDONLY|O_BINARY)) == -1)
return(0);
// Look for 'COMP' header
//
read(handle,Buffer,4);
comp = !strncmp(Buffer,COMP,4);
// Get source and destination length.
//
if (comp)
{
SrcLen = Verify(SourceFile);
read(handle,(void *)&DstLen,4);
MM_GetPtr(DstPtr,DstLen);
if (!*DstPtr)
return(0);
}
else
DstLen = Verify(SourceFile);
// LZW decompress OR simply load the file.
//
if (comp)