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engine.cpp
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engine.cpp
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/* Raw - Another World Interpreter
* Copyright (C) 2004 Gregory Montoir
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "engine.h"
#include "file.h"
#include "serializer.h"
#include "sys.h"
#include "parts.h"
Engine::Engine(System *paramSys, const char *dataDir, const char *saveDir)
: sys(paramSys), vm(&mixer, &res, &player, &video, sys), mixer(sys), res(&video, dataDir),
player(&mixer, &res, sys), video(&res, sys), _dataDir(dataDir), _saveDir(saveDir), _stateSlot(0) {
}
void Engine::run() {
while (!sys->input.quit) {
vm.checkThreadRequests();
vm.inp_updatePlayer();
processInput();
vm.hostFrame();
}
}
Engine::~Engine(){
finish();
sys->destroy();
}
void Engine::init() {
//Init system
sys->init("Out Of This World");
video.init();
res.allocMemBlock();
res.readEntries();
vm.init();
mixer.init();
player.init();
//Init virtual machine, legacy way
vm.initForPart(GAME_PART_FIRST); // This game part is the protection screen
// Try to cheat here. You can jump anywhere but the VM crashes afterward.
// Starting somewhere is probably not enough, the variables and calls return are probably missing.
//vm.initForPart(GAME_PART2); // Skip protection screen and go directly to intro
//vm.initForPart(GAME_PART3); // CRASH
//vm.initForPart(GAME_PART4); // Start directly in jail but then crash
//vm.initForPart(GAME_PART5); //CRASH
//vm.initForPart(GAME_PART6); // Start in the battlechar but CRASH afteward
//vm.initForPart(GAME_PART7); //CRASH
//vm.initForPart(GAME_PART8); //CRASH
//vm.initForPart(GAME_PART9); // Green screen not doing anything
}
void Engine::finish() {
player.free();
mixer.free();
res.freeMemBlock();
}
void Engine::processInput() {
if (sys->input.load) {
loadGameState(_stateSlot);
sys->input.load = false;
}
if (sys->input.save) {
saveGameState(_stateSlot, "quicksave");
sys->input.save = false;
}
if (sys->input.fastMode) {
vm._fastMode = !vm._fastMode;
sys->input.fastMode = false;
}
if (sys->input.stateSlot != 0) {
int8_t slot = _stateSlot + sys->input.stateSlot;
if (slot >= 0 && slot < MAX_SAVE_SLOTS) {
_stateSlot = slot;
debug(DBG_INFO, "Current game state slot is %d", _stateSlot);
}
sys->input.stateSlot = 0;
}
}
void Engine::makeGameStateName(uint8_t slot, char *buf) {
sprintf(buf, "raw.s%02d", slot);
}
void Engine::saveGameState(uint8_t slot, const char *desc) {
char stateFile[20];
makeGameStateName(slot, stateFile);
File f(true);
if (!f.open(stateFile, _saveDir, "wb")) {
warning("Unable to save state file '%s'", stateFile);
} else {
// header
const char *magic = "AWSV";
f.writeUint32BE(*(const uint32_t *)magic);
f.writeUint16BE(Serializer::CUR_VER);
f.writeUint16BE(0);
char hdrdesc[32];
strncpy(hdrdesc, desc, sizeof(hdrdesc) - 1);
f.write(hdrdesc, sizeof(hdrdesc));
// contents
Serializer s(&f, Serializer::SM_SAVE, res._memPtrStart);
vm.saveOrLoad(s);
res.saveOrLoad(s);
video.saveOrLoad(s);
player.saveOrLoad(s);
mixer.saveOrLoad(s);
if (f.ioErr()) {
warning("I/O error when saving game state");
} else {
debug(DBG_INFO, "Saved state to slot %d", _stateSlot);
}
}
}
void Engine::loadGameState(uint8_t slot) {
char stateFile[20];
makeGameStateName(slot, stateFile);
File f(true);
if (!f.open(stateFile, _saveDir, "rb")) {
warning("Unable to open state file '%s'", stateFile);
} else {
uint32_t id = f.readUint32BE();
const char *magic = "AWSV";
if (id != *(uint32_t *)magic) {
warning("Bad savegame format");
} else {
// mute
player.stop();
mixer.stopAll();
// header
uint16_t ver = f.readUint16BE();
f.readUint16BE();
char hdrdesc[32];
f.read(hdrdesc, sizeof(hdrdesc));
// contents
Serializer s(&f, Serializer::SM_LOAD, res._memPtrStart, ver);
vm.saveOrLoad(s);
res.saveOrLoad(s);
video.saveOrLoad(s);
player.saveOrLoad(s);
mixer.saveOrLoad(s);
}
if (f.ioErr()) {
warning("I/O error when loading game state");
} else {
debug(DBG_INFO, "Loaded state from slot %d", _stateSlot);
}
}
}
const char* Engine::getDataDir()
{
return this->_dataDir;
}