mirror of
https://github.com/libretro/scummvm.git
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650 lines
19 KiB
C++
650 lines
19 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2005-2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "lure/scripts.h"
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#include "lure/res.h"
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#include "lure/game.h"
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#include "common/stack.h"
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namespace Lure {
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// This list of hotspot Ids are used by sequence method #5 to deallocate a set
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// of hotspot Ids at once
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uint16 dealloc_list_1[] = {0x13F2, 0x418, 0x2711, 0x2712, 0x40D, 0x3EA, 0x411, 0};
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uint16 dealloc_list_2[] = {0x2729, 0x272A, 0x272B, 0x272C, 0x272E, 0x272E, 0x272F, 0};
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uint16 dealloc_list_3[] = {0x3EF, 0x3E9, 0x3EB, 0x3EC, 0x3ED, 0x3EE, 0x3F0, 0x3F1,
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0x420, 0x429, 0x436, 0x2715, 0x2716, 0x2717, 0x2718, 0x2719, 0x271A, 0x271E,
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0x271F, 0x2720, 0x2721, 0x2722, 0x2725, 0x2726, 0};
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uint16 *hotspot_dealloc_set[4] = {&dealloc_list_1[0], &dealloc_list_2[0],
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&dealloc_list_3[1], &dealloc_list_3[0]};
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/*------------------------------------------------------------------------*/
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/*- Script Method List -*/
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/*- -*/
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/*------------------------------------------------------------------------*/
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// activateHotspot
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// Activates a hotspot entry for active use
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void Script::activateHotspot(uint16 hotspotId, uint16 v2, uint16 v3) {
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Resources::getReference().activateHotspot(hotspotId);
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}
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// setHotspotScript
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// Sets a hotspot's animation script offset from a master table of offsets
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void Script::setHotspotScript(uint16 hotspotId, uint16 scriptIndex, uint16 v3) {
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Resources &r = Resources::getReference();
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uint16 offset = r.getHotspotScript(scriptIndex);
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HotspotData *rsc = r.getHotspot(hotspotId);
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rsc->sequenceOffset = offset;
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}
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// Clears the sequence delay list
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void Script::clearSequenceDelayList(uint16 v1, uint16 scriptIndex, uint16 v3) {
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Resources::getReference().delayList().clear();
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}
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// Deactivates a set of predefined of hotspots in a given list index
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void Script::deactivateHotspotSet(uint16 listIndex, uint16 v2, uint16 v3) {
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if (listIndex >= 3)
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error("Script::deactiveHotspotSet - Invalid list index");
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Resources &res = Resources::getReference();
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uint16 *hotspotId = hotspot_dealloc_set[listIndex];
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while (*hotspotId != 0) {
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res.deactivateHotspot(*hotspotId);
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++hotspotId;
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}
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}
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// deactivates the specified hotspot from active animation
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void Script::deactivateHotspot(uint16 hotspotId, uint16 v2, uint16 v3) {
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Resources &rsc = Resources::getReference();
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if (hotspotId < START_NONVISUAL_HOTSPOT_ID)
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rsc.deactivateHotspot(hotspotId);
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HotspotData *hs = rsc.getHotspot(hotspotId);
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hs->flags |= 0x20;
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if (hotspotId < START_NONVISUAL_HOTSPOT_ID)
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hs->layer = 0xff;
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}
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// Sets the offset for the table of action sequence offsets for the given
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// hotspot
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void Script::setActionsOffset(uint16 hotspotId, uint16 offset, uint16 v3) {
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Resources &res = Resources::getReference();
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HotspotData *hotspot = res.getHotspot(hotspotId);
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if (!res.getHotspotActions(offset))
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warning("Hotspot %d set to invalid actions offset %d",
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hotspotId, offset);
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hotspot->actionsOffset = offset;
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}
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// Add a sequence to be executed after a specified delay
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void Script::addDelayedSequence(uint16 seqOffset, uint16 delay, uint16 v3) {
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SequenceDelayList &list = Resources::getReference().delayList();
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list.addSequence(delay, seqOffset);
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}
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// Checks whether the given character is in the specified room, and stores
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// the result in the general value field
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void Script::characterInRoom(uint16 characterId, uint16 roomNumber, uint16 v3) {
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Resources &res = Resources::getReference();
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uint16 result = 0;
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if (characterId >= PLAYER_ID) {
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HotspotData *hotspot = res.getHotspot(characterId);
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if (hotspot->roomNumber == roomNumber)
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result = 1;
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}
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res.fieldList().setField(GENERAL, result);
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}
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// Changes the given hotspot's name to a new name
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void Script::setHotspotName(uint16 hotspotId, uint16 nameId, uint16 v3) {
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HotspotData *hotspot = Resources::getReference().getHotspot(hotspotId);
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hotspot->nameId = nameId;
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}
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// Unsure about this method, but at the moment I think it plays a sound
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void Script::playSound(uint16 v1, uint16 v2, uint16 v3) {
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// No implementation currently
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}
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// Displays the given string resource Id in a dialog
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void Script::displayDialog(uint16 stringId, uint16 v2, uint16 v3) {
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Dialog::show(stringId);
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}
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// Flags for remotely viewing a room
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void Script::remoteRoomViewSetup(uint16 v1, uint16 v2, uint16 v3) {
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Hotspot *player = Resources::getReference().getActiveHotspot(PLAYER_ID);
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player->setTickProc(0); // disable player actions
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Resources::getReference().fieldList().setField(OLD_ROOM_NUMBER,
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player->roomNumber());
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}
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// Gets the current blocked state for the given door and stores it in the
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// general value field
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void Script::getDoorBlocked(uint16 hotspotId, uint16 v2, uint16 v3) {
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Resources &res = Resources::getReference();
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RoomExitJoinData *joinRec = res.getExitJoin(hotspotId);
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res.fieldList().setField(GENERAL, joinRec->blocked);
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}
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// Checks whether the Skorl is in the cell
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void Script::isSkorlInCell(uint16 v1, uint16 v2, uint16 v3) {
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Resources &res = Resources::getReference();
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HotspotData *hotspot = res.getHotspot(SKORL_ID);
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uint16 v = (hotspot->roomNumber == 1) ? 0 : 1;
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res.fieldList().setField(GENERAL, v);
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}
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// Decrements the number of inventory itemst he player has
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void Script::decrInventoryItems(uint16 v1, uint16 v2, uint16 v3) {
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// module currently doesn't use a static counter for the number of
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// inventory items, so don't do anything
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}
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// Sets the current frame number for the given hotspot
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void Script::setFrameNumber(uint16 hotspotId, uint16 frameNumber, uint16 v3) {
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Hotspot *hotspot = Resources::getReference().getActiveHotspot(hotspotId);
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hotspot->setFrameNumber(frameNumber);
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}
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// Disables the given hotspot from being highlighted by the cursor
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void Script::disableHotspot(uint16 hotspotId, uint16 v2, uint16 v3) {
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HotspotData *hotspot = Resources::getReference().getHotspot(hotspotId);
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hotspot->flags |= 0x20;
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}
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// Called when the sack is cut with the knife
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void Script::cutSack(uint16 hotspotId, uint16 v2, uint16 v3) {
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Resources &res = Resources::getReference();
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HotspotData *data = res.getHotspot(SACK_ID);
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data->startY = 138;
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Hotspot *activeHotspot = res.getActiveHotspot(SACK_ID);
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if (activeHotspot)
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activeHotspot->setPosition(data->startX, data->startY);
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}
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// Increase the player's number by the specified amount
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void Script::increaseNumGroats(uint16 v1, uint16 numGroats, uint16 v3) {
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ValueTableData &fields = Resources::getReference().fieldList();
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fields.numGroats() += numGroats;
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}
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// Enables the flags for the given hotspot for it to be actively highlighted
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void Script::enableHotspot(uint16 hotspotId, uint16 v2, uint16 v3) {
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HotspotData *hotspot = Resources::getReference().getHotspot(hotspotId);
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// Clear flag 0x20 and add flag 0x80
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hotspot->flags = (hotspot->flags & 0xdf) | 0x80;
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}
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// Transforms the player
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void Script::transformPlayer(uint16 v1, uint16 v2, uint16 v3) {
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Resources &res = Resources::getReference();
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HotspotData *hotspot = res.getHotspot(TRANSFORM_ID);
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HotspotData *player = res.getHotspot(PLAYER_ID);
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hotspot->roomNumber = player->roomNumber;
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hotspot->startX = player->startX - 14;
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hotspot->startY = player->startY - 10;
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Hotspot *activeHotspot = res.addHotspot(TRANSFORM_ID);
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activeHotspot->setFrameNumber(0);
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activeHotspot->setScript(0x630);
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}
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// Marks the door in room 14 for closing
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void Script::room14DoorClose(uint16 v1, uint16 v2, uint16 v3) {
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RoomExitJoinData *joinRec = Resources::getReference().getExitJoin(0x2719);
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joinRec->blocked = 1;
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}
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// Sets the sequence result to 1 if the given secondary description for a
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// hotspot is empty (for inventory items, this gives the description before
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// the item is initially picked up)
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void Script::checkDroppedDesc(uint16 hotspotId, uint16 v2, uint16 v3) {
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Resources &res = Resources::getReference();
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HotspotData *hotspot = res.getHotspot(hotspotId);
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uint16 seqResult = (hotspot->descId2 == 0) ? 1 : 0;
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res.fieldList().setField(SEQUENCE_RESULT, seqResult);
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}
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// Marks the given door hotspot for closing
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void Script::doorClose(uint16 hotspotId, uint16 v2, uint16 v3) {
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RoomExitJoinData *joinRec = Resources::getReference().getExitJoin(hotspotId);
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if (!joinRec) error("Tried to close a non-door");
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joinRec->blocked = 1;
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}
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// Marks the given door hotspot for opening
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void Script::doorOpen(uint16 hotspotId, uint16 v2, uint16 v3) {
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RoomExitJoinData *joinRec = Resources::getReference().getExitJoin(hotspotId);
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if (!joinRec) error("Tried to close a non-door");
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joinRec->blocked = 0;
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}
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// Lookup the given message Id for the specified character and display in a dialog
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void Script::displayMessage(uint16 messageId, uint16 characterId, uint16 unknownVal) {
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Dialog::showMessage(messageId, characterId);
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}
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// Assign the given hotspot item to the player's inventory
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void Script::givePlayerItem(uint16 hotspotId, uint16 v2, uint16 v3) {
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HotspotData *hotspot = Resources::getReference().getHotspot(hotspotId);
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hotspot->roomNumber = PLAYER_ID;
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hotspot->flags |= 0x80;
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}
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// Decrease the number of graots the player has
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void Script::decreaseNumGroats(uint16 characterId, uint16 numGroats, uint16 v3) {
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ValueTableData &fields = Resources::getReference().fieldList();
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fields.numGroats() -= numGroats;
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}
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// Sets the tick handler for the village Skorl to an alternate handler
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void Script::setVillageSkorlTickProc(uint16 v1, uint16 v2, uint16 v3) {
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HotspotData *hotspot = Resources::getReference().getHotspot(0x3F1);
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hotspot->tickProcOffset = 0x7efa;
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}
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// Stores the current number of groats in the general field
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void Script::getNumGroats(uint16 v1, uint16 v2, uint16 v3) {
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ValueTableData fields = Resources::getReference().fieldList();
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fields.setField(GENERAL, fields.numGroats());
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}
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// Loads the specified animation, completely bypassing the standard process
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// of checking for a load proc/sequence
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void Script::animationLoad(uint16 hotspotId, uint16 v2, uint16 v3) {
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Resources::getReference().addHotspot(hotspotId);
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}
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// Adds the passed actions to the available actions for the given hotspot
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void Script::addActions(uint16 hotspotId, uint16 actions, uint16 v3) {
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HotspotData *hotspot = Resources::getReference().getHotspot(hotspotId);
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hotspot->actions |= actions;
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}
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// Checks the status of the cell door, and starts music depending on it's state
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void Script::checkCellDoor(uint16 v1, uint16 v2, uint16 v3) {
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// In the original game, this method checks to see if the cell door
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// is currently open, if it is, starts a music sequence. I'll
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// implement this method properly when I get around to implementing
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// the in-game music
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}
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typedef void(*SequenceMethodPtr)(uint16, uint16, uint16);
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struct SequenceMethodRecord {
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uint8 methodIndex;
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SequenceMethodPtr proc;
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};
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SequenceMethodRecord scriptMethods[] = {
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{0, Script::activateHotspot},
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{1, Script::setHotspotScript},
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{4, Script::clearSequenceDelayList},
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{5, Script::deactivateHotspotSet},
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{6, Script::deactivateHotspot},
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{8, Script::addDelayedSequence},
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{10, Script::characterInRoom},
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{11, Script::setActionsOffset},
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{12, Script::setHotspotName},
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{13, Script::playSound},
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{16, Script::displayDialog},
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{18, Script::remoteRoomViewSetup},
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{20, Script::checkCellDoor},
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{22, Script::getDoorBlocked},
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{23, Script::isSkorlInCell},
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{28, Script::decrInventoryItems},
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{30, Script::setFrameNumber},
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{32, Script::disableHotspot},
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{33, Script::cutSack},
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{34, Script::increaseNumGroats},
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{35, Script::enableHotspot},
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{37, Script::transformPlayer},
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{39, Script::room14DoorClose},
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{40, Script::checkDroppedDesc},
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{42, Script::doorClose},
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{44, Script::doorOpen},
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{47, Script::displayMessage},
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{50, Script::givePlayerItem},
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{51, Script::decreaseNumGroats},
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{54, Script::setVillageSkorlTickProc},
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{57, Script::getNumGroats},
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{62, Script::animationLoad},
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{63, Script::addActions},
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{65, Script::checkCellDoor},
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{0xff, NULL}};
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/*------------------------------------------------------------------------*/
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/*- Script Execution -*/
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/*- -*/
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/*------------------------------------------------------------------------*/
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uint16 Script::execute(uint16 startOffset) {
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Resources &r = Resources::getReference();
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ValueTableData &fields = r.fieldList();
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MemoryBlock *scriptData = r.scriptData();
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byte *scripts = scriptData->data();
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Common::Stack<uint16> stack;
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Common::Stack<uint16> methodStack;
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byte opcode;
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uint16 param, v1, v2;
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uint16 param1, param2, param3;
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uint16 fieldNum;
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uint32 tempVal;
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SequenceMethodPtr ptr;
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SequenceMethodRecord *rec;
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uint16 offset = startOffset;
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bool breakFlag = false;
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param = 0;
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fields.setField(SEQUENCE_RESULT, 0);
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while (!breakFlag) {
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if (offset >= scriptData->size())
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error("Script failure in script %d - invalid offset %d", startOffset, offset);
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opcode = scripts[offset++];
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if ((opcode & 1) != 0) {
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// Flag to read next two bytes as active parameter
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if (offset >= scriptData->size()-2)
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error("Script failure in script %d - invalid offset %d", startOffset, offset);
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param = READ_LE_UINT16(scripts + offset);
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offset += 2;
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}
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opcode >>= 1; // Discard param bit from opcode byte
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switch (opcode) {
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case S_OPCODE_ABORT:
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case S_OPCODE_ABORT2:
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case S_OPCODE_ABORT3:
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methodStack.clear();
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break;
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case S_OPCODE_ADD:
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stack.push(stack.pop() + stack.pop());
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break;
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case S_OPCODE_SUBTRACT:
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v1 = stack.pop();
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v2 = stack.pop();
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stack.push(v2 - v1);
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break;
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case S_OPCODE_MULTIPLY:
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tempVal = stack.pop() * stack.pop();
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stack.push(tempVal & 0xffff);
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param = (uint16) (tempVal >> 16);
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break;
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case S_OPCODE_DIVIDE:
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v1 = stack.pop();
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v2 = stack.pop();
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stack.push(v2 / v1);
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param = v2 % v1; // remainder
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break;
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case S_OPCODE_NOT_EQUALS:
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stack.push((stack.pop() != stack.pop()) ? 0 : 1);
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break;
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case S_OPCODE_EQUALS:
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stack.push((stack.pop() == stack.pop()) ? 0 : 1);
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break;
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case S_OPCODE_GT:
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stack.push((stack.pop() > stack.pop()) ? 1 : 0);
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break;
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case S_OPCODE_LT:
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stack.push((stack.pop() < stack.pop()) ? 1 : 0);
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break;
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case S_OPCODE_LT2:
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stack.push((stack.pop() < stack.pop()) ? 1 : 0);
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break;
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case S_OPCODE_GT2:
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stack.push((stack.pop() > stack.pop()) ? 1 : 0);
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break;
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case S_OPCODE_AND:
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stack.push(stack.pop() & stack.pop());
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break;
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case S_OPCODE_OR:
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stack.push(stack.pop() | stack.pop());
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break;
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case S_OPCODE_LOGICAL_AND:
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stack.push(((stack.pop() != 0) && (stack.pop() != 0)) ? 1 : 0);
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break;
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case S_OPCODE_LOGICAL_OR:
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stack.push(((stack.pop() != 0) || (stack.pop() != 0)) ? 1 : 0);
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break;
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case S_OPCODE_GET_FIELD:
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// Opcode not yet fully implemented
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fieldNum = param >> 1;
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v1 = fields.getField(fieldNum);
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stack.push(v1);
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break;
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|
|
case S_OPCODE_SET_FIELD:
|
|
// Opcode not yet fully implemented
|
|
fieldNum = param >> 1;
|
|
v1 = stack.pop();
|
|
fields.setField(fieldNum, v1);
|
|
break;
|
|
|
|
case S_OPCODE_PUSH:
|
|
stack.push(param);
|
|
break;
|
|
|
|
case S_OPCODE_SUBROUTINE:
|
|
methodStack.push(offset);
|
|
offset = param;
|
|
break;
|
|
|
|
case S_OPCODE_EXEC:
|
|
param1 = 0; param2 = 0; param3 = 0;
|
|
if (!stack.empty()) param1 = stack.pop();
|
|
if (!stack.empty()) param2 = stack.pop();
|
|
if (!stack.empty()) param3 = stack.pop();
|
|
|
|
rec = &scriptMethods[0];
|
|
while ((rec->methodIndex != 0xff) && (rec->methodIndex != param))
|
|
++rec;
|
|
|
|
if (rec->methodIndex == 0xff)
|
|
warning("Undefined script method %d", param);
|
|
else {
|
|
ptr = rec->proc;
|
|
ptr(param1, param2, param3);
|
|
}
|
|
break;
|
|
|
|
case S_OPCODE_COND_JUMP:
|
|
v1 = stack.pop();
|
|
if (v1 == 0) offset += (int16) param;
|
|
break;
|
|
|
|
case S_OPCODE_JUMP:
|
|
offset += (int16) param;
|
|
break;
|
|
|
|
case S_OPCODE_RANDOM:
|
|
param = r.random() >> 8; // make number between 0 to 255
|
|
break;
|
|
|
|
case S_OPCODE_END:
|
|
// Signal to end the execution
|
|
if (!methodStack.empty())
|
|
offset = methodStack.pop();
|
|
else
|
|
breakFlag = true;
|
|
break;
|
|
|
|
default:
|
|
error("Unknown script opcode %d", opcode);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return fields.getField(SEQUENCE_RESULT);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/*- Hotspot Script Handler -*/
|
|
/*- -*/
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
int16 HotspotScript::nextVal(MemoryBlock *data, uint16 &offset) {
|
|
if (offset >= data->size() - 1)
|
|
error("Script failure - invalid offset");
|
|
int16 value = READ_LE_UINT16(data->data() + offset);
|
|
offset += 2;
|
|
return value;
|
|
}
|
|
|
|
bool HotspotScript::execute(Hotspot *h)
|
|
{
|
|
Resources &r = Resources::getReference();
|
|
MemoryBlock *scriptData = r.hotspotScriptData();
|
|
uint16 offset = h->script();
|
|
int16 opcode = 0;
|
|
int16 param1, param2;
|
|
bool breakFlag = false;
|
|
|
|
while (!breakFlag) {
|
|
opcode = nextVal(scriptData, offset);
|
|
switch (opcode) {
|
|
case S2_OPCODE_TIMEOUT:
|
|
param1 = nextVal(scriptData, offset);
|
|
h->setTickCtr(param1);
|
|
h->setScript(offset);
|
|
breakFlag = true;
|
|
break;
|
|
|
|
case S2_OPCODE_POSITION:
|
|
param1 = nextVal(scriptData, offset);
|
|
param2 = nextVal(scriptData, offset);
|
|
h->setPosition(param1 - 0x80, param2 - 0x80);
|
|
break;
|
|
|
|
case S2_OPCODE_CHANGE_POS:
|
|
param1 = nextVal(scriptData, offset);
|
|
param2 = nextVal(scriptData, offset);
|
|
h->setPosition(h->x() + param1, h->y() + param2);
|
|
break;
|
|
|
|
case S2_OPCODE_UNLOAD:
|
|
breakFlag = true;
|
|
break;
|
|
|
|
case S2_OPCODE_DIMENSIONS:
|
|
param1 = nextVal(scriptData, offset) << 4;
|
|
param2 = nextVal(scriptData, offset);
|
|
h->setSize((uint16) param1, (uint16) param2);
|
|
break;
|
|
|
|
case S2_OPCODE_JUMP:
|
|
offset = (uint16) nextVal(scriptData, offset);
|
|
break;
|
|
|
|
case S2_OPCODE_ANIMATION:
|
|
param1 = nextVal(scriptData, offset);
|
|
h->setAnimation(param1);
|
|
break;
|
|
|
|
case S2_OPCODE_UNKNOWN_247:
|
|
param1 = nextVal(scriptData, offset);
|
|
param2 = nextVal(scriptData, offset);
|
|
// warning("UNKNOWN_247 stub called");
|
|
break;
|
|
|
|
case S2_OPCODE_UNKNOWN_258:
|
|
param1 = nextVal(scriptData, offset);
|
|
// warning("UNKNOWN_258 stub called");
|
|
break;
|
|
|
|
case S2_OPCODE_ACTIONS:
|
|
param1 = nextVal(scriptData, offset) << 4;
|
|
param2 = nextVal(scriptData, offset);
|
|
h->setActions((uint32) param1 | ((uint32) param2 << 16));
|
|
break;
|
|
|
|
default:
|
|
// Set the animation frame number
|
|
h->setFrameNumber(opcode);
|
|
h->setScript(offset);
|
|
breakFlag = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (opcode == S2_OPCODE_UNLOAD);
|
|
}
|
|
|
|
} // end of namespace Lure
|