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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.
*
*/
#include "common/system.h"
#include "common/debug.h"
#include "common/error.h"
#include "common/file.h"
#include "common/stream.h"
#include "adl/adl_v4.h"
#include "adl/detection.h"
#include "adl/display.h"
#include "adl/graphics.h"
#include "adl/disk.h"
#include "adl/sound.h"
namespace Adl {
class HiRes5Engine : public AdlEngine_v4 {
public:
HiRes5Engine(OSystem *syst, const AdlGameDescription *gd) :
AdlEngine_v4(syst, gd) { }
private:
// AdlEngine
void setupOpcodeTables();
void runIntro();
void init();
void initGameState();
void applyRegionWorkarounds();
void applyRoomWorkarounds(byte roomNr);
// AdlEngine_v4
bool isInventoryFull();
void loadSong(Common::ReadStream &stream);
int o_checkItemTimeLimits(ScriptEnv &e);
int o_startAnimation(ScriptEnv &e);
int o_winGame(ScriptEnv &e);
static const uint kRegions = 41;
static const uint kItems = 69;
Common::Array<byte> _itemTimeLimits;
Common::String _itemTimeLimitMsg;
Tones _song;
struct {
Common::String itemTimeLimit;
Common::String carryingTooMuch;
} _gameStrings;
};
typedef Common::Functor1Mem<ScriptEnv &, int, HiRes5Engine> OpcodeH5;
#define SetOpcodeTable(x) table = &x;
#define Opcode(x) table->push_back(new OpcodeH5(this, &HiRes5Engine::x))
#define OpcodeUnImpl() table->push_back(new OpcodeH5(this, 0))
void HiRes5Engine::setupOpcodeTables() {
Common::Array<const Opcode *> *table = 0;
SetOpcodeTable(_condOpcodes);
// 0x00
OpcodeUnImpl();
Opcode(o2_isFirstTime);
Opcode(o2_isRandomGT);
Opcode(o4_isItemInRoom);
// 0x04
Opcode(o3_isNounNotInRoom);
Opcode(o1_isMovesGT);
Opcode(o1_isVarEQ);
Opcode(o2_isCarryingSomething);
// 0x08
Opcode(o4_isVarGT);
Opcode(o1_isCurPicEQ);
OpcodeUnImpl();
SetOpcodeTable(_actOpcodes);
// 0x00
OpcodeUnImpl();
Opcode(o1_varAdd);
Opcode(o1_varSub);
Opcode(o1_varSet);
// 0x04
Opcode(o1_listInv);
Opcode(o4_moveItem);
Opcode(o1_setRoom);
Opcode(o2_setCurPic);
// 0x08
Opcode(o2_setPic);
Opcode(o1_printMsg);
Opcode(o4_setRegionToPrev);
Opcode(o_checkItemTimeLimits);
// 0x0c
Opcode(o4_moveAllItems);
Opcode(o1_quit);
Opcode(o4_setRegion);
Opcode(o4_save);
// 0x10
Opcode(o4_restore);
Opcode(o4_restart);
Opcode(o4_setRegionRoom);
Opcode(o_startAnimation);
// 0x14
Opcode(o1_resetPic);
Opcode(o1_goDirection<IDI_DIR_NORTH>);
Opcode(o1_goDirection<IDI_DIR_SOUTH>);
Opcode(o1_goDirection<IDI_DIR_EAST>);
// 0x18
Opcode(o1_goDirection<IDI_DIR_WEST>);
Opcode(o1_goDirection<IDI_DIR_UP>);
Opcode(o1_goDirection<IDI_DIR_DOWN>);
Opcode(o1_takeItem);
// 0x1c
Opcode(o1_dropItem);
Opcode(o4_setRoomPic);
Opcode(o_winGame);
OpcodeUnImpl();
// 0x20
Opcode(o2_initDisk);
}
bool HiRes5Engine::isInventoryFull() {
Common::List<Item>::const_iterator item;
byte weight = 0;
for (item = _state.items.begin(); item != _state.items.end(); ++item) {
if (item->room == IDI_ANY)
weight += item->description;
}
if (weight >= 100) {
printString(_gameStrings.carryingTooMuch);
inputString();
return true;
}
return false;
}
void HiRes5Engine::loadSong(Common::ReadStream &stream) {
while (true) {
const byte period = stream.readByte();
if (stream.err() || stream.eos())
error("Error loading song");
if (period == 0xff)
return;
byte length = stream.readByte();
if (stream.err() || stream.eos())
error("Error loading song");
const uint kClock = 1022727; // Apple II CPU clock rate
const uint kLoopCycles = 20; // Delay loop cycles
double freq = 0.0;
// This computation ignores CPU cycles spent on overflow handling and
// speaker control. As a result, our tone frequencies will be slightly
// higher than those on original hardware.
if (period != 0)
freq = kClock / 2.0 / (period * kLoopCycles);
const double len = (length > 0 ? length - 1 : 255) * 256 * kLoopCycles * 1000 / (double)kClock;
_song.push_back(Tone(freq, len));
}
}
int HiRes5Engine::o_checkItemTimeLimits(ScriptEnv &e) {
OP_DEBUG_1("\tCHECK_ITEM_TIME_LIMITS(VARS[%d])", e.arg(1));
bool lostAnItem = false;
Common::List<Item>::iterator item;
for (item = _state.items.begin(); item != _state.items.end(); ++item) {
const byte room = item->room;
const byte region = item->region;
if (room == IDI_ANY || room == IDI_CUR_ROOM || (room == _state.room && region == _state.region)) {
if (getVar(e.arg(1)) < _itemTimeLimits[item->id - 1]) {
item->room = IDI_VOID_ROOM;
lostAnItem = true;
}
}
}
if (lostAnItem) {
printString(_gameStrings.itemTimeLimit);
inputString();
}
return 1;
}
int HiRes5Engine::o_startAnimation(ScriptEnv &e) {
OP_DEBUG_0("\tSTART_ANIMATION()");
// TODO: sets a flag that triggers an animation
return 0;
}
int HiRes5Engine::o_winGame(ScriptEnv &e) {
OP_DEBUG_0("\tWIN_GAME()");
showRoom();
playTones(_song, true);
return o1_quit(e);
}
void HiRes5Engine::runIntro() {
insertDisk(2);
StreamPtr stream(_disk->createReadStream(0x10, 0x0, 0x00, 31));
_display->setMode(DISPLAY_MODE_HIRES);
_display->loadFrameBuffer(*stream);
_display->updateHiResScreen();
inputKey();
_display->home();
_display->setMode(DISPLAY_MODE_TEXT);
stream.reset(_disk->createReadStream(0x03, 0xc, 0x34, 1));
Common::String menu(readString(*stream));
while (!g_engine->shouldQuit()) {
_display->home();
_display->printString(menu);
Common::String cmd(inputString());
// We ignore the backup and format menu options
if (!cmd.empty() && cmd[0] == APPLECHAR('1'))
break;
};
}
void HiRes5Engine::init() {
_graphics = new Graphics_v2(*_display);
insertDisk(2);
StreamPtr stream(_disk->createReadStream(0x5, 0x0, 0x02));
loadRegionLocations(*stream, kRegions);
stream.reset(_disk->createReadStream(0xd, 0x2, 0x04));
loadRegionInitDataOffsets(*stream, kRegions);
stream.reset(_disk->createReadStream(0x7, 0xe));
_strings.verbError = readStringAt(*stream, 0x4f);
_strings.nounError = readStringAt(*stream, 0x8e);
_strings.enterCommand = readStringAt(*stream, 0xbc);
stream.reset(_disk->createReadStream(0x7, 0xc));
_strings.lineFeeds = readString(*stream);
stream.reset(_disk->createReadStream(0x8, 0x3, 0x00, 2));
_strings_v2.saveInsert = readStringAt(*stream, 0x66);
_strings_v2.saveReplace = readStringAt(*stream, 0x112);
_strings_v2.restoreInsert = readStringAt(*stream, 0x180);
_strings.playAgain = readStringAt(*stream, 0x247, 0xff);
_messageIds.cantGoThere = 110;
_messageIds.dontUnderstand = 112;
_messageIds.itemDoesntMove = 114;
_messageIds.itemNotHere = 115;
_messageIds.thanksForPlaying = 113;
stream.reset(_disk->createReadStream(0xe, 0x1, 0x13, 4));
loadItemDescriptions(*stream, kItems);
stream.reset(_disk->createReadStream(0x8, 0xd, 0xfd, 1));
loadDroppedItemOffsets(*stream, 16);
stream.reset(_disk->createReadStream(0xb, 0xa, 0x05, 1));
loadItemPicIndex(*stream, kItems);
stream.reset(_disk->createReadStream(0x7, 0x8, 0x01));
for (uint i = 0; i < kItems; ++i)
_itemTimeLimits.push_back(stream->readByte());
if (stream->eos() || stream->err())
error("Failed to read item time limits");
stream.reset(_disk->createReadStream(0x8, 0x2, 0x2d));
_gameStrings.itemTimeLimit = readString(*stream);
stream.reset(_disk->createReadStream(0x8, 0x7, 0x02));
_gameStrings.carryingTooMuch = readString(*stream);
stream.reset(_disk->createReadStream(0xc, 0xb, 0x20));
loadSong(*stream);
}
void HiRes5Engine::initGameState() {
_state.vars.resize(40);
insertDisk(2);
StreamPtr stream(_disk->createReadStream(0x5, 0x1, 0x00, 3));
loadItems(*stream);
// A combined total of 1213 rooms
static const byte rooms[kRegions] = {
6, 16, 24, 57, 40, 30, 76, 40,
54, 38, 44, 21, 26, 42, 49, 32,
59, 69, 1, 1, 1, 1, 1, 18,
25, 13, 28, 28, 11, 23, 9, 31,
6, 29, 29, 34, 9, 10, 95, 86,
1
};
initRegions(rooms, kRegions);
loadRegion(1);
_state.room = 5;
}
void HiRes5Engine::applyRegionWorkarounds() {
// WORKAROUND: Remove/fix buggy commands
switch (_state.region) {
case 3:
// "USE PIN" references a missing message, but cannot
// be triggered due to shadowing of the "USE" verb.
// We remove it anyway to allow script dumping to proceed.
// TODO: Investigate if we should fix this command instead
// of removing it.
removeCommand(_roomCommands, 12);
break;
case 14:
// "WITH SHOVEL" references a missing message. This bug
// is game-breaking in the original, but unlikely to occur
// in practice due to the "DIG" command not asking for what
// to dig with. Probably a remnant of an earlier version
// of the script.
removeCommand(_roomCommands, 0);
}
}
void HiRes5Engine::applyRoomWorkarounds(byte roomNr) {
// WORKAROUND: Remove/fix buggy commands
if (_state.region == 17 && roomNr == 49) {
// "GET WATER" references a missing message when you already
// have water. This message should be 117 instead of 17.
getCommand(_roomData.commands, 8).script[4] = 117;
}
}
Engine *HiRes5Engine_create(OSystem *syst, const AdlGameDescription *gd) {
return new HiRes5Engine(syst, gd);
}
} // End of namespace Adl
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