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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 "sci/engine/features.h"
#include "sci/engine/kernel.h"
#include "sci/engine/script.h"
#include "sci/engine/selector.h"
#include "sci/engine/vm.h"
#include "common/config-manager.h"
#include "common/file.h"
namespace Sci {
GameFeatures::GameFeatures(SegManager *segMan, Kernel *kernel) : _segMan(segMan), _kernel(kernel) {
_setCursorType = SCI_VERSION_NONE;
_doSoundType = SCI_VERSION_NONE;
_lofsType = SCI_VERSION_NONE;
_gfxFunctionsType = SCI_VERSION_NONE;
_messageFunctionType = SCI_VERSION_NONE;
_moveCountType = kMoveCountUninitialized;
#ifdef ENABLE_SCI32
_sci21KernelType = SCI_VERSION_NONE;
#endif
_usesCdTrack = Common::File::exists("cdaudio.map");
if (!ConfMan.getBool("use_cdaudio"))
_usesCdTrack = false;
_forceDOSTracks = false;
_pseudoMouseAbility = kPseudoMouseAbilityUninitialized;
}
reg_t GameFeatures::getDetectionAddr(const Common::String &objName, Selector slc, int methodNum) {
// Get address of target object
reg_t objAddr = _segMan->findObjectByName(objName, 0);
reg_t addr;
if (objAddr.isNull()) {
error("getDetectionAddr: %s object couldn't be found", objName.c_str());
return NULL_REG;
}
if (methodNum == -1) {
if (lookupSelector(_segMan, objAddr, slc, NULL, &addr) != kSelectorMethod) {
error("getDetectionAddr: target selector is not a method of object %s", objName.c_str());
return NULL_REG;
}
} else {
addr = _segMan->getObject(objAddr)->getFunction(methodNum);
}
return addr;
}
bool GameFeatures::autoDetectSoundType() {
// Look up the script address
reg_t addr = getDetectionAddr("Sound", SELECTOR(play));
if (!addr.getSegment())
return false;
uint16 offset = addr.getOffset();
Script *script = _segMan->getScript(addr.getSegment());
uint16 intParam = 0xFFFF;
bool foundTarget = false;
while (true) {
int16 opparams[4];
byte extOpcode;
byte opcode;
offset += readPMachineInstruction(script->getBuf(offset), extOpcode, opparams);
opcode = extOpcode >> 1;
// Check for end of script
if (opcode == op_ret || offset >= script->getBufSize())
break;
// The play method of the Sound object pushes the DoSound command that
// it will use just before it calls DoSound. We intercept that here in
// order to check what sound semantics are used, cause the position of
// the sound commands has changed at some point during SCI1 middle.
if (opcode == op_pushi) {
// Load the pushi parameter
intParam = opparams[0];
} else if (opcode == op_callk) {
uint16 kFuncNum = opparams[0];
// Late SCI1 games call kIsObject before kDoSound
if (kFuncNum == 6) { // kIsObject (SCI0-SCI11)
foundTarget = true;
} else if (kFuncNum == 45) { // kDoSound (SCI1)
// First, check which DoSound function is called by the play
// method of the Sound object
switch (intParam) {
case 1:
_doSoundType = SCI_VERSION_0_EARLY;
break;
case 7:
_doSoundType = SCI_VERSION_1_EARLY;
break;
case 8:
_doSoundType = SCI_VERSION_1_LATE;
break;
default:
// Unknown case... should never happen. We fall back to
// alternative detection here, which works in general, apart
// from some transitive games like Jones CD
_doSoundType = foundTarget ? SCI_VERSION_1_LATE : SCI_VERSION_1_EARLY;
break;
}
if (_doSoundType != SCI_VERSION_NONE)
return true;
}
}
}
return false; // not found
}
SciVersion GameFeatures::detectDoSoundType() {
if (_doSoundType == SCI_VERSION_NONE) {
if (getSciVersion() == SCI_VERSION_0_EARLY) {
// Almost all of the SCI0EARLY games use different sound resources than
// SCI0LATE. Although the last SCI0EARLY game (lsl2) uses SCI0LATE resources
_doSoundType = g_sci->getResMan()->detectEarlySound() ? SCI_VERSION_0_EARLY : SCI_VERSION_0_LATE;
#ifdef ENABLE_SCI32
} else if (getSciVersion() >= SCI_VERSION_2_1_EARLY) {
_doSoundType = SCI_VERSION_2_1_EARLY;
#endif
} else if (SELECTOR(nodePtr) == -1) {
// No nodePtr selector, so this game is definitely using newer
// SCI0 sound code (i.e. SCI_VERSION_0_LATE)
_doSoundType = SCI_VERSION_0_LATE;
} else if (getSciVersion() >= SCI_VERSION_1_LATE) {
// All SCI1 late games use the newer doSound semantics
_doSoundType = SCI_VERSION_1_LATE;
} else {
if (!autoDetectSoundType()) {
warning("DoSound detection failed, taking an educated guess");
if (getSciVersion() >= SCI_VERSION_1_MIDDLE)
_doSoundType = SCI_VERSION_1_LATE;
else if (getSciVersion() > SCI_VERSION_01)
_doSoundType = SCI_VERSION_1_EARLY;
}
}
debugC(1, kDebugLevelSound, "Detected DoSound type: %s", getSciVersionDesc(_doSoundType));
}
return _doSoundType;
}
SciVersion GameFeatures::detectSetCursorType() {
if (_setCursorType == SCI_VERSION_NONE) {
if (getSciVersion() <= SCI_VERSION_1_MIDDLE) {
// SCI1 middle and older games never use cursor views
_setCursorType = SCI_VERSION_0_EARLY;
} else if (getSciVersion() >= SCI_VERSION_1_1) {
// SCI1.1 games always use cursor views
_setCursorType = SCI_VERSION_1_1;
} else { // SCI1 late game, detect cursor semantics
// If the Cursor object doesn't exist, we're using the SCI0 early
// kSetCursor semantics.
if (_segMan->findObjectByName("Cursor") == NULL_REG) {
_setCursorType = SCI_VERSION_0_EARLY;
debugC(1, kDebugLevelGraphics, "Detected SetCursor type: %s", getSciVersionDesc(_setCursorType));
return _setCursorType;
}
// Check for the existence of the handCursor object (first found).
// This is based on KQ5.
reg_t objAddr = _segMan->findObjectByName("handCursor", 0);
// If that doesn't exist, we assume it uses SCI1.1 kSetCursor semantics
if (objAddr == NULL_REG) {
_setCursorType = SCI_VERSION_1_1;
debugC(1, kDebugLevelGraphics, "Detected SetCursor type: %s", getSciVersionDesc(_setCursorType));
return _setCursorType;
}
// Now we check what the number variable holds in the handCursor
// object.
uint16 number = readSelectorValue(_segMan, objAddr, SELECTOR(number));
// If the number is 0, it uses views and therefore the SCI1.1
// kSetCursor semantics, otherwise it uses the SCI0 early kSetCursor
// semantics.
if (number == 0)
_setCursorType = SCI_VERSION_1_1;
else
_setCursorType = SCI_VERSION_0_EARLY;
}
debugC(1, kDebugLevelGraphics, "Detected SetCursor type: %s", getSciVersionDesc(_setCursorType));
}
return _setCursorType;
}
bool GameFeatures::autoDetectLofsType(Common::String gameSuperClassName, int methodNum) {
// Look up the script address
reg_t addr = getDetectionAddr(gameSuperClassName.c_str(), -1, methodNum);
if (!addr.getSegment())
return false;
uint16 offset = addr.getOffset();
Script *script = _segMan->getScript(addr.getSegment());
while (true) {
int16 opparams[4];
byte extOpcode;
byte opcode;
offset += readPMachineInstruction(script->getBuf(offset), extOpcode, opparams);
opcode = extOpcode >> 1;
// Check for end of script
if (opcode == op_ret || offset >= script->getBufSize())
break;
if (opcode == op_lofsa || opcode == op_lofss) {
// Load lofs operand
uint16 lofs = opparams[0];
// Check for going out of bounds when interpreting as abs/rel
if (lofs >= script->getBufSize())
_lofsType = SCI_VERSION_0_EARLY;
if ((signed)offset + (int16)lofs < 0)
_lofsType = SCI_VERSION_1_MIDDLE;
if ((signed)offset + (int16)lofs >= (signed)script->getBufSize())
_lofsType = SCI_VERSION_1_MIDDLE;
if (_lofsType != SCI_VERSION_NONE)
return true;
// If we reach here, we haven't been able to deduce the lofs
// parameter type so far.
}
}
return false; // not found
}
SciVersion GameFeatures::detectLofsType() {
if (_lofsType == SCI_VERSION_NONE) {
// This detection only works (and is only needed) for SCI 1
if (getSciVersion() <= SCI_VERSION_01) {
_lofsType = SCI_VERSION_0_EARLY;
return _lofsType;
}
if (getSciVersion() >= SCI_VERSION_1_1 && getSciVersion() <= SCI_VERSION_2_1_LATE) {
// SCI1.1 type, i.e. we compensate for the fact that the heap is attached
// to the end of the script
_lofsType = SCI_VERSION_1_1;
return _lofsType;
}
if (getSciVersion() == SCI_VERSION_3) {
// SCI3 type, same as pre-SCI1.1, really, as there is no separate heap
// resource
_lofsType = SCI_VERSION_3;
return _lofsType;
}
// Find a function of the "Game" object (which is the game super class) which invokes lofsa/lofss
const Object *gameObject = _segMan->getObject(g_sci->getGameObject());
const Object *gameSuperObject = _segMan->getObject(gameObject->getSuperClassSelector());
bool found = false;
if (gameSuperObject) {
Common::String gameSuperClassName = _segMan->getObjectName(gameObject->getSuperClassSelector());
for (uint m = 0; m < gameSuperObject->getMethodCount(); m++) {
found = autoDetectLofsType(gameSuperClassName, m);
if (found)
break;
}
} else {
warning("detectLofsType(): Could not find superclass of game object");
}
if (!found) {
warning("detectLofsType(): failed, taking an educated guess");
if (getSciVersion() >= SCI_VERSION_1_MIDDLE)
_lofsType = SCI_VERSION_1_MIDDLE;
else
_lofsType = SCI_VERSION_0_EARLY;
}
debugC(1, kDebugLevelVM, "Detected Lofs type: %s", getSciVersionDesc(_lofsType));
}
return _lofsType;
}
bool GameFeatures::autoDetectGfxFunctionsType(int methodNum) {
// Look up the script address
reg_t addr = getDetectionAddr("Rm", SELECTOR(overlay), methodNum);
if (!addr.getSegment())
return false;
uint16 offset = addr.getOffset();
Script *script = _segMan->getScript(addr.getSegment());
while (true) {
int16 opparams[4];
byte extOpcode;
byte opcode;
offset += readPMachineInstruction(script->getBuf(offset), extOpcode, opparams);
opcode = extOpcode >> 1;
// Check for end of script
if (opcode == op_ret || offset >= script->getBufSize())
break;
if (opcode == op_callk) {
uint16 kFuncNum = opparams[0];
uint16 argc = opparams[1];
if (kFuncNum == 8) { // kDrawPic (SCI0 - SCI11)
// If kDrawPic is called with 6 parameters from the overlay
// selector, the game is using old graphics functions.
// Otherwise, if it's called with 8 parameters (e.g. SQ3) or 4 parameters
// (e.g. Hoyle 1/2), it's using new graphics functions.
_gfxFunctionsType = (argc == 6) ? SCI_VERSION_0_EARLY : SCI_VERSION_0_LATE;
return true;
}
}
}
return false; // not found
}
SciVersion GameFeatures::detectGfxFunctionsType() {
if (_gfxFunctionsType == SCI_VERSION_NONE) {
if (getSciVersion() == SCI_VERSION_0_EARLY) {
// Old SCI0 games always used old graphics functions
_gfxFunctionsType = SCI_VERSION_0_EARLY;
} else if (getSciVersion() >= SCI_VERSION_01) {
// SCI01 and newer games always used new graphics functions
_gfxFunctionsType = SCI_VERSION_0_LATE;
} else { // SCI0 late
// Check if the game is using an overlay
bool searchRoomObj = false;
reg_t rmObjAddr = _segMan->findObjectByName("Rm");
if (SELECTOR(overlay) != -1) {
// The game has an overlay selector, check how it calls kDrawPic
// to determine the graphics functions type used
if (lookupSelector(_segMan, rmObjAddr, SELECTOR(overlay), NULL, NULL) == kSelectorMethod) {
if (!autoDetectGfxFunctionsType()) {
warning("Graphics functions detection failed, taking an educated guess");
// Try detecting the graphics function types from the
// existence of the motionCue selector (which is a bit
// of a hack)
if (_kernel->findSelector("motionCue") != -1)
_gfxFunctionsType = SCI_VERSION_0_LATE;
else
_gfxFunctionsType = SCI_VERSION_0_EARLY;
}
} else {
// The game has an overlay selector, but it's not a method
// of the Rm object (like in Hoyle 1 and 2), so search for
// other methods
searchRoomObj = true;
}
} else {
// The game doesn't have an overlay selector, so search for it
// manually
searchRoomObj = true;
}
if (searchRoomObj) {
// If requested, check if any method of the Rm object is calling
// kDrawPic, as the overlay selector might be missing in demos
bool found = false;
const Object *obj = _segMan->getObject(rmObjAddr);
for (uint m = 0; m < obj->getMethodCount(); m++) {
found = autoDetectGfxFunctionsType(m);
if (found)
break;
}
if (!found) {
// No method of the Rm object is calling kDrawPic, thus the
// game doesn't have overlays and is using older graphics
// functions
_gfxFunctionsType = SCI_VERSION_0_EARLY;
}
}
}
debugC(1, kDebugLevelVM, "Detected graphics functions type: %s", getSciVersionDesc(_gfxFunctionsType));
}
return _gfxFunctionsType;
}
SciVersion GameFeatures::detectMessageFunctionType() {
if (_messageFunctionType != SCI_VERSION_NONE)
return _messageFunctionType;
if (getSciVersion() > SCI_VERSION_1_1) {
_messageFunctionType = SCI_VERSION_1_1;
return _messageFunctionType;
} else if (getSciVersion() < SCI_VERSION_1_1) {
_messageFunctionType = SCI_VERSION_1_LATE;
return _messageFunctionType;
}
Common::List<ResourceId> resources = g_sci->getResMan()->listResources(kResourceTypeMessage, -1);
if (resources.empty()) {
// No messages found, so this doesn't really matter anyway...
_messageFunctionType = SCI_VERSION_1_1;
return _messageFunctionType;
}
Resource *res = g_sci->getResMan()->findResource(*resources.begin(), false);
assert(res);
// Only v2 Message resources use the kGetMessage kernel function.
// v3-v5 use the kMessage kernel function.
if (res->getUint32SEAt(0) / 1000 == 2)
_messageFunctionType = SCI_VERSION_1_LATE;
else
_messageFunctionType = SCI_VERSION_1_1;
debugC(1, kDebugLevelVM, "Detected message function type: %s", getSciVersionDesc(_messageFunctionType));
return _messageFunctionType;
}
#ifdef ENABLE_SCI32
bool GameFeatures::autoDetectSci21KernelType() {
// First, check if the Sound object is loaded
reg_t soundObjAddr = _segMan->findObjectByName("Sound");
if (soundObjAddr.isNull()) {
// Usually, this means that the Sound object isn't loaded yet.
// This case doesn't occur in early SCI2.1 games, and we've only
// seen it happen in the RAMA demo, thus we can assume that the
// game is using a SCI2.1 table
// HACK: The Inside the Chest Demo and King's Questions minigame
// don't have sounds at all, but they're using a SCI2 kernel
if (g_sci->getGameId() == GID_CHEST || g_sci->getGameId() == GID_KQUESTIONS) {
_sci21KernelType = SCI_VERSION_2;
return true;
}
warning("autoDetectSci21KernelType(): Sound object not loaded, assuming a SCI2.1 table");
_sci21KernelType = SCI_VERSION_2_1_EARLY;
return true;
}
// Look up the script address
reg_t addr = getDetectionAddr("Sound", SELECTOR(play));
if (!addr.getSegment())
return false;
uint16 offset = addr.getOffset();
Script *script = _segMan->getScript(addr.getSegment());
while (true) {
int16 opparams[4];
byte extOpcode;
byte opcode;
offset += readPMachineInstruction(script->getBuf(offset), extOpcode, opparams);
opcode = extOpcode >> 1;
// Check for end of script
// We don't check for op_ret here because the Phantasmagoria Mac script
// has an op_ret early on in its script (controlled by a branch).
if (offset >= script->getBufSize())
break;
if (opcode == op_callk) {
uint16 kFuncNum = opparams[0];
// Here we check for the kDoSound opcode that's used in SCI2.1.
// Finding 0x40 as kDoSound in the Sound::play() function means the
// game is using the modified SCI2 kernel table found in some older
// SCI2.1 games (GK2 demo, KQ7 v1.4).
// Finding 0x75 as kDoSound means the game is using the regular
// SCI2.1 kernel table.
if (kFuncNum == 0x40) {
_sci21KernelType = SCI_VERSION_2;
return true;
} else if (kFuncNum == 0x75) {
_sci21KernelType = SCI_VERSION_2_1_EARLY;
return true;
}
}
}
return false; // not found
}
SciVersion GameFeatures::detectSci21KernelType() {
if (_sci21KernelType == SCI_VERSION_NONE) {
if (!autoDetectSci21KernelType())
error("Could not detect the SCI2.1 kernel table type");
debugC(1, kDebugLevelVM, "Detected SCI2.1 kernel type: %s", getSciVersionDesc(_sci21KernelType));
}
return _sci21KernelType;
}
#endif
bool GameFeatures::autoDetectMoveCountType() {
// Look up the script address
reg_t addr = getDetectionAddr("Motion", SELECTOR(doit));
if (!addr.getSegment())
return false;
uint16 offset = addr.getOffset();
Script *script = _segMan->getScript(addr.getSegment());
bool foundTarget = false;
while (true) {
int16 opparams[4];
byte extOpcode;
byte opcode;
offset += readPMachineInstruction(script->getBuf(offset), extOpcode, opparams);
opcode = extOpcode >> 1;
// Check for end of script
if (opcode == op_ret || offset >= script->getBufSize())
break;
if (opcode == op_callk) {
uint16 kFuncNum = opparams[0];
// Games which ignore move count call kAbs before calling kDoBresen
if (_kernel->getKernelName(kFuncNum) == "Abs") {
foundTarget = true;
} else if (_kernel->getKernelName(kFuncNum) == "DoBresen") {
_moveCountType = foundTarget ? kIgnoreMoveCount : kIncrementMoveCount;
return true;
}
}
}
return false; // not found
}
MoveCountType GameFeatures::detectMoveCountType() {
if (_moveCountType == kMoveCountUninitialized) {
// SCI0/SCI01 games always increment move count
if (getSciVersion() <= SCI_VERSION_01) {
_moveCountType = kIncrementMoveCount;
} else if (getSciVersion() >= SCI_VERSION_1_1) {
// SCI1.1 and newer games always ignore move count
_moveCountType = kIgnoreMoveCount;
} else {
if (!autoDetectMoveCountType()) {
error("Move count autodetection failed");
_moveCountType = kIncrementMoveCount; // Most games do this, so best guess
}
}
debugC(1, kDebugLevelVM, "Detected move count handling: %s", (_moveCountType == kIncrementMoveCount) ? "increment" : "ignore");
}
return _moveCountType;
}
bool GameFeatures::useAltWinGMSound() {
if (g_sci && g_sci->getPlatform() == Common::kPlatformWindows && g_sci->isCD() && !_forceDOSTracks) {
SciGameId id = g_sci->getGameId();
return (id == GID_ECOQUEST ||
id == GID_JONES ||
id == GID_KQ5 ||
//id == GID_FREDDYPHARKAS || // Has alternate tracks, but handles them differently
id == GID_SQ4);
} else {
return false;
}
}
// PseudoMouse was added during SCI1
// PseudoMouseAbility is about a tiny difference in the keyboard driver, which sets the event type to either
// 40h (old behaviour) or 44h (the keyboard driver actually added 40h to the existing value).
// See engine/kevent.cpp, kMapKeyToDir - also script 933
// SCI1EGA:
// Quest for Glory 2 still used the old way.
//
// SCI1EARLY:
// King's Quest 5 0.000.062 uses the old way.
// Leisure Suit Larry 1 demo uses the new way, but no PseudoMouse class.
// Fairy Tales uses the new way.
// X-Mas 1990 uses the old way, no PseudoMouse class.
// Space Quest 4 floppy (1.1) uses the new way.
// Mixed Up Mother Goose uses the old way, no PseudoMouse class.
//
// SCI1MIDDLE:
// Leisure Suit Larry 5 demo uses the new way.
// Conquests of the Longbow demo uses the new way.
// Leisure Suit Larry 1 (2.0) uses the new way.
// Astro Chicken II uses the new way.
PseudoMouseAbilityType GameFeatures::detectPseudoMouseAbility() {
if (_pseudoMouseAbility == kPseudoMouseAbilityUninitialized) {
if (getSciVersion() < SCI_VERSION_1_EARLY) {
// SCI1 EGA or earlier -> pseudo mouse ability is always disabled
_pseudoMouseAbility = kPseudoMouseAbilityFalse;
} else if (getSciVersion() == SCI_VERSION_1_EARLY) {
// For SCI1 early some games had it enabled, some others didn't.
// We try to find an object called "PseudoMouse". If it's found, we enable the ability otherwise we don't.
reg_t pseudoMouseAddr = _segMan->findObjectByName("PseudoMouse", 0);
if (pseudoMouseAddr != NULL_REG) {
_pseudoMouseAbility = kPseudoMouseAbilityTrue;
} else {
_pseudoMouseAbility = kPseudoMouseAbilityFalse;
}
} else {
// SCI1 middle or later -> pseudo mouse ability is always enabled
_pseudoMouseAbility = kPseudoMouseAbilityTrue;
}
}
return _pseudoMouseAbility;
}
} // End of namespace Sci
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