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|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*
*/
/*
* This code is based on original Hugo Trilogy source code
*
* Copyright (c) 1989-1995 David P. Gray
*
*/
#include "common/system.h"
#include "common/savefile.h"
#include "hugo/hugo.h"
#include "hugo/file.h"
#include "hugo/global.h"
#include "hugo/schedule.h"
#include "hugo/display.h"
#include "hugo/util.h"
#include "hugo/object.h"
namespace Hugo {
FileManager::FileManager(HugoEngine *vm) : _vm(vm) {
}
FileManager::~FileManager() {
}
/**
* Convert 4 planes (RGBI) data to 8-bit DIB format
* Return original plane data ptr
*/
byte *FileManager::convertPCC(byte *p, uint16 y, uint16 bpl, image_pt dataPtr) {
debugC(2, kDebugFile, "convertPCC(byte *p, %d, %d, image_pt data_p)", y, bpl);
dataPtr += y * bpl * 8; // Point to correct DIB line
for (int16 r = 0, g = bpl, b = g + bpl, i = b + bpl; r < bpl; r++, g++, b++, i++) { // Each byte in all planes
for (int8 bit = 7; bit >= 0; bit--) { // Each bit in byte
*dataPtr++ = (((p[r] >> bit & 1) << 0) |
((p[g] >> bit & 1) << 1) |
((p[b] >> bit & 1) << 2) |
((p[i] >> bit & 1) << 3));
}
}
return p;
}
/**
* Read a pcx file of length len. Use supplied seq_p and image_p or
* allocate space if NULL. Name used for errors. Returns address of seq_p
* Set first TRUE to initialize b_index (i.e. not reading a sequential image in file).
*/
seq_t *FileManager::readPCX(Common::File &f, seq_t *seqPtr, byte *imagePtr, bool firstFl, const char *name) {
debugC(1, kDebugFile, "readPCX(..., %s)", name);
// Read in the PCC header and check consistency
static PCC_header_t PCC_header;
PCC_header.mfctr = f.readByte();
PCC_header.vers = f.readByte();
PCC_header.enc = f.readByte();
PCC_header.bpx = f.readByte();
PCC_header.x1 = f.readUint16LE();
PCC_header.y1 = f.readUint16LE();
PCC_header.x2 = f.readUint16LE();
PCC_header.y2 = f.readUint16LE();
PCC_header.xres = f.readUint16LE();
PCC_header.yres = f.readUint16LE();
f.read(PCC_header.palette, sizeof(PCC_header.palette));
PCC_header.vmode = f.readByte();
PCC_header.planes = f.readByte();
PCC_header.bytesPerLine = f.readUint16LE();
f.read(PCC_header.fill2, sizeof(PCC_header.fill2));
if (PCC_header.mfctr != 10)
error("Bad data file format: %s", name);
// Allocate memory for seq_t if 0
if (seqPtr == 0) {
if ((seqPtr = (seq_t *)malloc(sizeof(seq_t))) == 0)
error("Insufficient memory to run game.");
}
// Find size of image data in 8-bit DIB format
// Note save of x2 - marks end of valid data before garbage
uint16 bytesPerLine4 = PCC_header.bytesPerLine * 4; // 4-bit bpl
seqPtr->bytesPerLine8 = bytesPerLine4 * 2; // 8-bit bpl
seqPtr->lines = PCC_header.y2 - PCC_header.y1 + 1;
seqPtr->x2 = PCC_header.x2 - PCC_header.x1 + 1;
// Size of the image
uint16 size = seqPtr->lines * seqPtr->bytesPerLine8;
// Allocate memory for image data if NULL
if (imagePtr == 0) {
imagePtr = (byte *)malloc((size_t) size);
}
assert(imagePtr);
seqPtr->imagePtr = imagePtr;
// Process the image data, converting to 8-bit DIB format
uint16 y = 0; // Current line index
byte pline[XPIX]; // Hold 4 planes of data
byte *p = pline; // Ptr to above
while (y < seqPtr->lines) {
byte c = f.readByte();
if ((c & REP_MASK) == REP_MASK) {
byte d = f.readByte(); // Read data byte
for (int i = 0; i < (c & LEN_MASK); i++) {
*p++ = d;
if ((uint16)(p - pline) == bytesPerLine4)
p = convertPCC(pline, y++, PCC_header.bytesPerLine, imagePtr);
}
} else {
*p++ = c;
if ((uint16)(p - pline) == bytesPerLine4)
p = convertPCC(pline, y++, PCC_header.bytesPerLine, imagePtr);
}
}
return seqPtr;
}
/**
* Read object file of PCC images into object supplied
*/
void FileManager::readImage(int objNum, object_t *objPtr) {
debugC(1, kDebugFile, "readImage(%d, object_t *objPtr)", objNum);
if (!objPtr->seqNumb) // This object has no images
return;
if (_vm->isPacked()) {
_objectsArchive.seek((uint32)objNum * sizeof(objBlock_t), SEEK_SET);
objBlock_t objBlock; // Info on file within database
objBlock.objOffset = _objectsArchive.readUint32LE();
objBlock.objLength = _objectsArchive.readUint32LE();
_objectsArchive.seek(objBlock.objOffset, SEEK_SET);
} else {
char *buf = (char *) malloc(2048 + 1); // Buffer for file access
strcat(strcat(strcpy(buf, _vm->_picDir), _vm->_arrayNouns[objPtr->nounIndex][0]), OBJEXT);
if (!_objectsArchive.open(buf)) {
warning("File %s not found, trying again with %s%s", buf, _vm->_arrayNouns[objPtr->nounIndex][0], OBJEXT);
strcat(strcpy(buf, _vm->_arrayNouns[objPtr->nounIndex][0]), OBJEXT);
if (!_objectsArchive.open(buf))
error("File not found: %s", buf);
}
free(buf);
}
bool firstFl = true; // Initializes pcx read function
seq_t *seqPtr = 0; // Ptr to sequence structure
// Now read the images into an images list
for (int j = 0; j < objPtr->seqNumb; j++) { // for each sequence
for (int k = 0; k < objPtr->seqList[j].imageNbr; k++) { // each image
if (k == 0) { // First image
// Read this image - allocate both seq and image memory
seqPtr = readPCX(_objectsArchive, 0, 0, firstFl, _vm->_arrayNouns[objPtr->nounIndex][0]);
objPtr->seqList[j].seqPtr = seqPtr;
firstFl = false;
} else { // Subsequent image
// Read this image - allocate both seq and image memory
seqPtr->nextSeqPtr = readPCX(_objectsArchive, 0, 0, firstFl, _vm->_arrayNouns[objPtr->nounIndex][0]);
seqPtr = seqPtr->nextSeqPtr;
}
// Compute the bounding box - x1, x2, y1, y2
// Note use of x2 - marks end of valid data in row
uint16 x2 = seqPtr->x2;
seqPtr->x1 = seqPtr->x2;
seqPtr->x2 = 0;
seqPtr->y1 = seqPtr->lines;
seqPtr->y2 = 0;
image_pt dibPtr = seqPtr->imagePtr;
for (int y = 0; y < seqPtr->lines; y++, dibPtr += seqPtr->bytesPerLine8 - x2) {
for (int x = 0; x < x2; x++) {
if (*dibPtr++) { // Some data found
if (x < seqPtr->x1)
seqPtr->x1 = x;
if (x > seqPtr->x2)
seqPtr->x2 = x;
if (y < seqPtr->y1)
seqPtr->y1 = y;
if (y > seqPtr->y2)
seqPtr->y2 = y;
}
}
}
}
assert(seqPtr);
seqPtr->nextSeqPtr = objPtr->seqList[j].seqPtr; // loop linked list to head
}
// Set the current image sequence to first or last
switch (objPtr->cycling) {
case INVISIBLE: // (May become visible later)
case ALMOST_INVISIBLE:
case NOT_CYCLING:
case CYCLE_FORWARD:
objPtr->currImagePtr = objPtr->seqList[0].seqPtr;
break;
case CYCLE_BACKWARD:
objPtr->currImagePtr = seqPtr;
break;
default:
warning("Unexpected cycling: %d", objPtr->cycling);
}
if (!_vm->isPacked())
_objectsArchive.close();
}
/**
* Read sound (or music) file data. Call with SILENCE to free-up
* any allocated memory. Also returns size of data
*/
sound_pt FileManager::getSound(int16 sound, uint16 *size) {
debugC(1, kDebugFile, "getSound(%d, %d)", sound, *size);
// No more to do if SILENCE (called for cleanup purposes)
if (sound == _vm->_soundSilence)
return 0;
// Open sounds file
Common::File fp; // Handle to SOUND_FILE
if (!fp.open(SOUND_FILE)) {
warning("Hugo Error: File not found %s", SOUND_FILE);
return 0;
}
// If this is the first call, read the lookup table
static bool has_read_header = false;
static sound_hdr_t s_hdr[MAX_SOUNDS]; // Sound lookup table
if (!has_read_header) {
if (fp.read(s_hdr, sizeof(s_hdr)) != sizeof(s_hdr))
error("Wrong sound file format: %s", SOUND_FILE);
has_read_header = true;
}
*size = s_hdr[sound].size;
if (*size == 0)
error("Wrong sound file format or missing sound %d: %s", sound, SOUND_FILE);
// Allocate memory for sound or music, if possible
sound_pt soundPtr = (byte *)malloc(s_hdr[sound].size); // Ptr to sound data
assert(soundPtr);
// Seek to data and read it
fp.seek(s_hdr[sound].offset, SEEK_SET);
if (fp.read(soundPtr, s_hdr[sound].size) != s_hdr[sound].size)
error("File not found: %s", SOUND_FILE);
fp.close();
return soundPtr;
}
/**
* Return whether file exists or not
*/
bool FileManager::fileExists(char *filename) {
Common::File f;
if (f.open(filename)) {
f.close();
return true;
}
return false;
}
/**
* Save game to supplied slot (-1 is INITFILE)
*/
void FileManager::saveGame(int16 slot, const char *descrip) {
debugC(1, kDebugFile, "saveGame(%d, %s)", slot, descrip);
// Get full path of saved game file - note test for INITFILE
Common::String path; // Full path of saved game
if (slot == -1)
path = _vm->_initFilename;
else
path = Common::String::format(_vm->_saveFilename.c_str(), slot);
Common::WriteStream *out = _vm->getSaveFileManager()->openForSaving(path);
if (!out) {
warning("Can't create file '%s', game not saved", path.c_str());
return;
}
// Write version. We can't restore from obsolete versions
out->write(&kSavegameVersion, sizeof(kSavegameVersion));
// Save description of saved game
out->write(descrip, DESCRIPLEN);
_vm->_object->saveObjects(out);
const status_t &gameStatus = _vm->getGameStatus();
// Save whether hero image is swapped
out->write(&_vm->_heroImage, sizeof(_vm->_heroImage));
// Save score
int score = _vm->getScore();
out->write(&score, sizeof(score));
// Save story mode
out->write(&gameStatus.storyModeFl, sizeof(gameStatus.storyModeFl));
// Save jumpexit mode
out->write(&gameStatus.jumpExitFl, sizeof(gameStatus.jumpExitFl));
// Save gameover status
out->write(&gameStatus.gameOverFl, sizeof(gameStatus.gameOverFl));
// Save screen states
out->write(_vm->_screenStates, sizeof(*_vm->_screenStates) * _vm->_numScreens);
// Save points table
out->write(_vm->_points, sizeof(point_t) * _vm->_numBonuses);
// Now save current time and all current events in event queue
_vm->_scheduler->saveEvents(out);
// Save palette table
_vm->_screen->savePal(out);
// Save maze status
out->write(&_maze, sizeof(maze_t));
out->finalize();
delete out;
}
/**
* Restore game from supplied slot number (-1 is INITFILE)
*/
void FileManager::restoreGame(int16 slot) {
debugC(1, kDebugFile, "restoreGame(%d)", slot);
// Initialize new-game status
_vm->initStatus();
// Get full path of saved game file - note test for INITFILE
Common::String path; // Full path of saved game
if (slot == -1)
path = _vm->_initFilename;
else
path = Common::String::format(_vm->_saveFilename.c_str(), slot);
Common::SeekableReadStream *in = _vm->getSaveFileManager()->openForLoading(path);
if (!in)
return;
// Check version, can't restore from different versions
int saveVersion;
in->read(&saveVersion, sizeof(saveVersion));
if (saveVersion != kSavegameVersion) {
error("Savegame of incompatible version");
return;
}
// Skip over description
in->seek(DESCRIPLEN, SEEK_CUR);
// If hero image is currently swapped, swap it back before restore
if (_vm->_heroImage != HERO)
_vm->_object->swapImages(HERO, _vm->_heroImage);
_vm->_object->restoreObjects(in);
in->read(&_vm->_heroImage, sizeof(_vm->_heroImage));
// If hero swapped in saved game, swap it
int heroImg = _vm->_heroImage;
if (heroImg != HERO)
_vm->_object->swapImages(HERO, _vm->_heroImage);
_vm->_heroImage = heroImg;
status_t &gameStatus = _vm->getGameStatus();
int score;
in->read(&score, sizeof(score));
_vm->setScore(score);
in->read(&gameStatus.storyModeFl, sizeof(gameStatus.storyModeFl));
in->read(&gameStatus.jumpExitFl, sizeof(gameStatus.jumpExitFl));
in->read(&gameStatus.gameOverFl, sizeof(gameStatus.gameOverFl));
in->read(_vm->_screenStates, sizeof(*_vm->_screenStates) * _vm->_numScreens);
// Restore points table
in->read(_vm->_points, sizeof(point_t) * _vm->_numBonuses);
_vm->_object->restoreAllSeq();
// Now restore time of the save and the event queue
_vm->_scheduler->restoreEvents(in);
// Restore palette and change it if necessary
_vm->_screen->restorePal(in);
// Restore maze status
in->read(&_maze, sizeof(maze_t));
delete in;
}
/**
* Initialize the size of a saved game (from the fixed initial game).
* If status.initsave is TRUE, or the initial saved game is not found,
* force a save to create one. Normally the game will be shipped with
* the initial game file but useful to force a write during development
* when the size is changeable.
* The net result is a valid INITFILE, with status.savesize initialized.
*/
void FileManager::initSavedGame() {
debugC(1, kDebugFile, "initSavedGame");
// Force save of initial game
if (_vm->getGameStatus().initSaveFl)
saveGame(-1, "");
// If initial game doesn't exist, create it
Common::SeekableReadStream *in = _vm->getSaveFileManager()->openForLoading(_vm->_initFilename);
if (!in) {
saveGame(-1, "");
in = _vm->getSaveFileManager()->openForLoading(_vm->_initFilename);
if (!in) {
warning("Unable to write file: %s", _vm->_initFilename.c_str());
return;
}
}
// Must have an open saved game now
_vm->getGameStatus().saveSize = in->size();
delete in;
// Check sanity - maybe disk full or path set to read-only drive?
if (_vm->getGameStatus().saveSize <= 0)
warning("Unable to write file: %s", _vm->_initFilename.c_str());
}
/**
* Read the encrypted text from the boot file and print it
*/
void FileManager::printBootText() {
debugC(1, kDebugFile, "printBootText");
Common::File ofp;
if (!ofp.open(BOOTFILE)) {
if (_vm->_gameVariant == 3) {
//TODO initialize properly _boot structure
warning("printBootText - Skipping as H1 Dos may be a freeware");
return;
} else {
error("Missing startup file");
}
}
// Allocate space for the text and print it
char *buf = (char *)malloc(_boot.exit_len + 1);
if (buf) {
// Skip over the boot structure (already read) and read exit text
ofp.seek((long)sizeof(_boot), SEEK_SET);
if (ofp.read(buf, _boot.exit_len) != (size_t)_boot.exit_len)
error("Error while reading startup file");
// Decrypt the exit text, using CRYPT substring
int i;
for (i = 0; i < _boot.exit_len; i++)
buf[i] ^= CRYPT[i % strlen(CRYPT)];
buf[i] = '\0';
Utils::Box(BOX_OK, "%s", buf);
}
free(buf);
ofp.close();
}
/**
* Reads boot file for program environment. Fatal error if not there or
* file checksum is bad. De-crypts structure while checking checksum
*/
void FileManager::readBootFile() {
debugC(1, kDebugFile, "readBootFile");
Common::File ofp;
if (!ofp.open(BOOTFILE)) {
if (_vm->_gameVariant == 3) {
//TODO initialize properly _boot structure
warning("readBootFile - Skipping as H1 Dos may be a freeware");
return;
} else {
error("Missing startup file");
}
}
if (ofp.size() < (int32)sizeof(_boot))
error("Corrupted startup file");
_boot.checksum = ofp.readByte();
_boot.registered = ofp.readByte();
ofp.read(_boot.pbswitch, sizeof(_boot.pbswitch));
ofp.read(_boot.distrib, sizeof(_boot.distrib));
_boot.exit_len = ofp.readUint16LE();
byte *p = (byte *)&_boot;
byte checksum = 0;
for (uint32 i = 0; i < sizeof(_boot); i++) {
checksum ^= p[i];
p[i] ^= CRYPT[i % strlen(CRYPT)];
}
ofp.close();
if (checksum)
error("Corrupted startup file");
}
/**
* Returns address of uif_hdr[id], reading it in if first call
*/
uif_hdr_t *FileManager::getUIFHeader(uif_t id) {
debugC(1, kDebugFile, "getUIFHeader(%d)", id);
static bool firstFl = true;
static uif_hdr_t UIFHeader[MAX_UIFS]; // Lookup for uif fonts/images
// Initialize offset lookup if not read yet
if (firstFl) {
firstFl = false;
// Open unbuffered to do far read
Common::File ip; // Image data file
if (!ip.open(UIF_FILE))
error("File not found: %s", UIF_FILE);
if (ip.size() < (int32)sizeof(UIFHeader))
error("Wrong file format: %s", UIF_FILE);
for (int i = 0; i < MAX_UIFS; ++i) {
UIFHeader[i].size = ip.readUint16LE();
UIFHeader[i].offset = ip.readUint32LE();
}
ip.close();
}
return &UIFHeader[id];
}
/**
* Read uif item into supplied buffer.
*/
void FileManager::readUIFItem(int16 id, byte *buf) {
debugC(1, kDebugFile, "readUIFItem(%d, ...)", id);
// Open uif file to read data
Common::File ip; // UIF_FILE handle
if (!ip.open(UIF_FILE))
error("File not found: %s", UIF_FILE);
// Seek to data
uif_hdr_t *UIFHeaderPtr = getUIFHeader((uif_t)id);
ip.seek(UIFHeaderPtr->offset, SEEK_SET);
// We support pcx images and straight data
seq_t *dummySeq; // Dummy seq_t for image data
switch (id) {
case UIF_IMAGES: // Read uif images file
dummySeq = readPCX(ip, 0, buf, true, UIF_FILE);
free(dummySeq);
break;
default: // Read file data into supplied array
if (ip.read(buf, UIFHeaderPtr->size) != UIFHeaderPtr->size)
error("Wrong file format: %s", UIF_FILE);
break;
}
ip.close();
}
/**
* Simple instructions given when F1 pressed twice in a row
* Only in DOS versions
*/
void FileManager::instructions() {
Common::File f;
if (!f.open(HELPFILE)) {
warning("help.dat not found");
return;
}
char readBuf[2];
while (f.read(readBuf, 1)) {
char line[1024], *wrkLine;
wrkLine = line;
wrkLine[0] = readBuf[0];
wrkLine++;
do {
f.read(wrkLine, 1);
} while (*wrkLine++ != EOP);
wrkLine[-2] = '\0'; // Remove EOP and previous CR
Utils::Box(BOX_ANY, "%s", line);
wrkLine = line;
f.read(readBuf, 2); // Remove CRLF after EOP
}
f.close();
}
/**
* Read the uif image file (inventory icons)
*/
void FileManager::readUIFImages() {
debugC(1, kDebugFile, "readUIFImages");
readUIFItem(UIF_IMAGES, _vm->_screen->getGUIBuffer()); // Read all uif images
}
} // End of namespace Hugo
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