void ScummEngine_v2::o2_getObjPreposition() {
getResultPos();
int obj = getVarOrDirectWord(PARAM_1);
if (whereIsObject(obj) != WIO_NOT_FOUND) {
byte *ptr = getOBCDFromObject(obj) + 12;
setResult(*ptr >> 5);
} else {
void ScummEngine_v0::o_setOwnerOf() {
int obj, owner;
obj = getVarOrDirectWord(PARAM_1);
owner = getVarOrDirectByte(PARAM_2);
if (!obj)
obj = _cmdObject;
setOwnerOf(obj, owner);
}
void ScummEngine_v2::o2_setObjPreposition() {
int obj = getVarOrDirectWord(PARAM_1);
int unk = fetchScriptByte();
if (_game.platform == Common::kPlatformNES)
return;
if (whereIsObject(obj) != WIO_NOT_FOUND) {
// FIXME: this might not work properly the moment we save and restore the game.
byte *ptr = getOBCDFromObject(obj) + 12;
*ptr &= 0x1F;
*ptr |= unk << 5;
}
}
void ScummEngine_v4::o4_ifState() {
int a = getVarOrDirectWord(PARAM_1);
int b = getVarOrDirectByte(PARAM_2);
// WORKAROUND bug #3306145 (also occurs in original): Some old versions of
// Indy3 sometimes fail to allocate IQ points correctly. To quote:
// "About the points error leaving Castle Brunwald: It seems to "reversed"!
// When you get caught, free yourself and escape, you get 25 IQ points even
// though you're not supposed to. However if you escape WITHOUT getting
// caught, you get 0 IQ points (supposed to get 25 IQ points)."
// This workaround is meant to address that.
if (_game.id == GID_INDY3 && a == 367 &&
vm.slot[_currentScript].number == 363 && _currentRoom == 25) {
b = 0;
}
jumpRelative(getState(a) == b);
}
void ScummEngine_v4::o4_pickupObject() {
int obj = getVarOrDirectWord(PARAM_1);
if (obj < 1) {
error("pickupObjectOld received invalid index %d (script %d)", obj, vm.slot[_currentScript].number);
}
if (getObjectIndex(obj) == -1)
return;
if (whereIsObject(obj) == WIO_INVENTORY) // Don't take an object twice
return;
// debug(0, "adding %d from %d to inventoryOld", obj, _currentRoom);
addObjectToInventory(obj, _roomResource);
markObjectRectAsDirty(obj);
putOwner(obj, VAR(VAR_EGO));
putClass(obj, kObjectClassUntouchable, 1);
putState(obj, 1);
clearDrawObjectQueue();
runInventoryScript(1);
}
void ScummEngine_v4::o4_oldRoomEffect() {
int a;
_opcode = fetchScriptByte();
if ((_opcode & 0x1F) == 3) {
a = getVarOrDirectWord(PARAM_1);
if (_game.platform == Common::kPlatformFMTowns && _game.version == 3) {
if (a == 4) {
_textSurface.fillRect(Common::Rect(0, 0, _textSurface.w * _textSurfaceMultiplier, _textSurface.h * _textSurfaceMultiplier), 0);
#ifndef DISABLE_TOWNS_DUAL_LAYER_MODE
if (_townsScreen)
_townsScreen->clearLayer(1);
#endif
return;
}
}
if (a) {
_switchRoomEffect = (byte)(a & 0xFF);
_switchRoomEffect2 = (byte)(a >> 8);
} else {
void ScummEngine_v4::o4_ifNotState() {
int a = getVarOrDirectWord(PARAM_1);
int b = getVarOrDirectByte(PARAM_2);
jumpRelative(getState(a) != b);
}
void ScummEngine_v4::o4_oldRoomEffect() {
int a;
_opcode = fetchScriptByte();
if ((_opcode & 0x1F) == 3) {
a = getVarOrDirectWord(PARAM_1);
#if 1
if (_game.platform == Common::kPlatformFMTowns && _game.version == 3) {
// FIXME / TODO: OK the first thing to note is: at least in Zak256,
// maybe also in other games, this opcode does a bit more. I added
// some stubs here, but somebody with a full IDA or more knowledge
// about this will have to fill in the gaps. At least now we know
// that something is missing here :-)
if (a == 4) {
//printf("o5_oldRoomEffect ODDBALL: _opcode = 0x%x, a = 0x%x\n", _opcode, a);
// No idea what byte_2FCCF is, but it's a globale boolean flag.
// I only add it here as a temporary hack to make the pseudo code compile.
// Maybe it is just there as a reentry protection guard, given
// how it is used? It might also correspond to _screenEffectFlag.
int byte_2FCCF = 0;
// For now, we force a redraw of the screen background. This
// way the Zak end credits seem to work mostly correct.
VirtScreen *vs = &_virtscr[kMainVirtScreen];
restoreBackground(Common::Rect(0, vs->topline, vs->w, vs->topline + vs->h));
vs->setDirtyRange(0, vs->h);
updateDirtyScreen(kMainVirtScreen);
if (byte_2FCCF) {
// Here now "sub_1C44" is called, which sets byte_2FCCF to 0 then
// calls yet another sub (which also reads byte_2FCCF):
byte_2FCCF = 0;
//call sub_0BB3
// Now sub_085C is called. This is quite simply: it sets
// 0xF000 bytes. starting at 0x40000 to 0. No idea what that
// buffer is, maybe a screen buffer, though. Note that
// 0xF000 = 320*192.
// Maybe this is also the charset mask being cleaned?
// call sub_085C
// And then sub_1C54 is called, which is almost identical to
// the above sub_1C44, only it sets byte_2FCCF to 1:
byte_2FCCF = 1;
// call sub_0BB3
} else {
// Here only sub_085C is called (see comment above)
// call sub_085C
}
return;
}
#endif
}
if (a) {
_switchRoomEffect = (byte)(a & 0xFF);
_switchRoomEffect2 = (byte)(a >> 8);
} else {
void ScummEngine_v2::o2_assignVarWordIndirect() {
getResultPosIndirect();
setResult(getVarOrDirectWord(PARAM_1));
}
int ScummEngine_v2::getActiveObject() {
return getVarOrDirectWord(PARAM_1);
}
void ScummEngine_v0::o_getObjectOwner() {
getResultPos();
int obj = getVarOrDirectWord(PARAM_1);
setResult(getOwner(obj ? obj : _cmdObject));
}
