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script.cpp
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script.cpp
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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 "audio/mididrv.h"
#include "audio/mixer.h"
#include "groovie/script.h"
#include "groovie/cell.h"
#include "groovie/cursor.h"
#include "groovie/graphics.h"
#include "groovie/groovie.h"
#include "groovie/music.h"
#include "groovie/player.h"
#include "groovie/resource.h"
#include "groovie/saveload.h"
#include "common/archive.h"
#include "common/config-manager.h"
#include "common/debug-channels.h"
#include "common/events.h"
#include "common/file.h"
#include "common/macresman.h"
#include "common/translation.h"
#include "gui/message.h"
#define NUM_OPCODES 90
namespace Groovie {
Script::Script(GroovieEngine *vm, EngineVersion version) :
_code(NULL), _savedCode(NULL), _stacktop(0), _debugger(NULL), _vm(vm),
_videoFile(NULL), _videoRef(0), _staufsMove(NULL), _lastCursor(0xff),
_version(version), _random("GroovieScripts") {
// Initialize the opcode set depending on the engine version
switch (version) {
case kGroovieT7G:
_opcodes = _opcodesT7G;
break;
case kGroovieV2:
_opcodes = _opcodesV2;
break;
}
// Prepare the variables
_bitflags = 0;
for (int i = 0; i < 0x400; i++) {
setVariable(i, 0);
}
// Initialize the music type variable
MidiDriver::DeviceHandle dev = MidiDriver::detectDevice(MDT_MIDI | MDT_ADLIB | MDT_PREFER_GM);
if (MidiDriver::getMusicType(dev) == MT_ADLIB) {
// MIDI through AdLib
setVariable(0x100, 0);
} else if ((MidiDriver::getMusicType(dev) == MT_MT32) || ConfMan.getBool("native_mt32")) {
// MT-32
setVariable(0x100, 2);
} else {
// GM
setVariable(0x100, 1);
}
_hotspotTopAction = 0;
_hotspotBottomAction = 0;
_hotspotRightAction = 0;
_hotspotLeftAction = 0;
_hotspotSlot = (uint16)-1;
_oldInstruction = (uint16)-1;
_videoSkipAddress = 0;
}
Script::~Script() {
delete[] _code;
delete[] _savedCode;
delete _videoFile;
}
void Script::setVariable(uint16 variablenum, byte value) {
_variables[variablenum] = value;
debugC(1, kDebugScriptvars, "script variable[0x%03X] = %d (0x%04X)", variablenum, value, value);
}
void Script::setDebugger(Debugger *debugger) {
_debugger = debugger;
}
void Script::timerTick() {
setVariable(0x103, _variables[0x103] + 1);
}
bool Script::loadScript(Common::String filename) {
Common::SeekableReadStream *scriptfile = 0;
if (_vm->_macResFork) {
// Try to open the script file from the resource fork
scriptfile = _vm->_macResFork->getResource(filename);
} else {
// Try to open the script file
scriptfile = SearchMan.createReadStreamForMember(filename);
}
if (!scriptfile)
return false;
// Save the script filename
_scriptFile = filename;
// Load the code
_codeSize = scriptfile->size();
_code = new byte[_codeSize];
if (!_code)
return false;
scriptfile->read(_code, _codeSize);
delete scriptfile;
// Patch the loaded code for known script bugs
if (filename.equals("dr.grv")) {
// WORKAROUND for the cake puzzle glitch (bug #2458322): Lowering the
// piece on the first column and second row updates the wrong script
// variable
assert(_codeSize == 5546);
_code[0x03C2] = 0x38;
} else if (filename.equals("maze.grv")) {
// GRAPHICS ENHANCEMENT - Leave a skeleton in the maze.
// Replaces one normal T intersection with the unused(?)
// skeleton T intersection graphics.
assert(_codeSize == 3652);
// Terminating T branch
_code[0x0769] = 0x46;
_code[0x0774] = 0x3E;
_code[0x077A] = 0x42;
// T with branch on right
_code[0x08E2] = 0x43;
_code[0x08D7] = 0x44;
_code[0x08E8] = 0x45;
// T with branch on left
_code[0x0795] = 0x41;
_code[0x078A] = 0x40;
_code[0x079B] = 0x3F;
}
// Initialize the script
_currentInstruction = 0;
return true;
}
void Script::directGameLoad(int slot) {
// Reject invalid slots
if (slot < 0 || slot > 9) {
return;
}
// TODO: Return to the main script, likely reusing most of o_returnscript()
// HACK: We set variable 0x19 to the slot to load, and set the current
// instruction to the one that actually loads the saved game specified
// in that variable. This will change in other versions of the game and
// in other games.
setVariable(0x19, slot);
_currentInstruction = 0x287;
// TODO: We'll probably need to start by running the beginning of the
// script to let it do the soundcard initialization and then do the
// actual loading.
// Due to HACK above, the call to check valid save slots is not run.
// As this is where we load save names, manually call it here.
o_checkvalidsaves();
}
void Script::step() {
// Prepare the base debug string
_debugString = _scriptFile + Common::String::format("@0x%04X: ", _currentInstruction);
// Get the current opcode
byte opcode = readScript8bits();
_firstbit = ((opcode & 0x80) != 0);
opcode = opcode & 0x7F;
// Show the opcode debug string
_debugString += Common::String::format("op 0x%02X: ", opcode);
// Only output if we're not re-doing the previous instruction
if (_currentInstruction != _oldInstruction) {
debugCN(1, kDebugScript, "%s", _debugString.c_str());
_oldInstruction = _currentInstruction;
}
// Detect invalid opcodes
if (opcode >= NUM_OPCODES) {
o_invalid();
return;
}
// Execute the current opcode
OpcodeFunc op = _opcodes[opcode];
(this->*op)();
}
void Script::setMouseClick(uint8 button) {
_eventMouseClicked = button;
}
void Script::setKbdChar(uint8 c) {
_eventKbdChar = c;
}
Common::String &Script::getContext() {
return _debugString;
}
uint8 Script::getCodeByte(uint16 address) {
if (address >= _codeSize)
error("Trying to read a script byte at address 0x%04X, while the "
"script is just 0x%04X bytes long", address, _codeSize);
return _code[address];
}
uint8 Script::readScript8bits() {
uint8 data = getCodeByte(_currentInstruction);
_currentInstruction++;
return data;
}
uint8 Script::readScriptVar() {
uint8 data = _variables[readScript8or16bits()];
return data;
}
uint16 Script::readScript16bits() {
uint8 lower = readScript8bits();
uint8 upper = readScript8bits();
return lower | (upper << 8);
}
uint32 Script::readScript32bits() {
uint16 lower = readScript16bits();
uint16 upper = readScript16bits();
return lower | (upper << 16);
}
uint16 Script::readScript8or16bits() {
if (_firstbit) {
return readScript8bits();
} else {
return readScript16bits();
}
}
uint8 Script::readScriptChar(bool allow7C, bool limitVal, bool limitVar) {
uint8 result;
uint8 data = readScript8bits();
if (limitVal) {
data &= 0x7F;
}
if (allow7C && (data == 0x7C)) {
// Index a bidimensional array
uint8 parta, partb;
parta = readScriptChar(false, false, false);
partb = readScriptChar(false, true, true);
result = _variables[0x0A * parta + partb + 0x19];
} else if (data == 0x23) {
// Index an array
data = readScript8bits();
if (limitVar) {
data &= 0x7F;
}
result = _variables[data - 0x61];
} else {
// Immediate value
result = data - 0x30;
}
return result;
}
uint32 Script::getVideoRefString() {
Common::String str;
byte c;
while ((c = readScript8bits())) {
switch (c) {
case 0x23:
c = readScript8bits();
c = _variables[c - 0x61] + 0x30;
if (c >= 0x41 && c <= 0x5A) {
c += 0x20;
}
break;
case 0x7C:
uint8 parta, partb;
parta = readScriptChar(false, false, false);
partb = readScriptChar(false, false, false);
c = _variables[0x0A * parta + partb + 0x19] + 0x30;
break;
default:
if (c >= 0x41 && c <= 0x5A) {
c += 0x20;
}
}
// Append the current character at the end of the string
str += c;
}
// Add a trailing dot
str += 0x2E;
debugCN(0, kDebugScript, "%s", str.c_str());
// Extract the script name.
Common::String scriptname(_scriptFile.c_str(), _scriptFile.size() - 4);
// Get the fileref of the resource
return _vm->_resMan->getRef(str, scriptname);
}
bool Script::hotspot(Common::Rect rect, uint16 address, uint8 cursor) {
// Test if the current mouse position is contained in the specified rectangle
Common::Point mousepos = _vm->_system->getEventManager()->getMousePos();
bool contained = rect.contains(mousepos);
// Show hotspots when debugging
if (DebugMan.isDebugChannelEnabled(kDebugHotspots)) {
if (!_vm->_graphicsMan->isFullScreen())
rect.translate(0, -80);
_vm->_graphicsMan->_foreground.frameRect(rect, 250);
_vm->_graphicsMan->updateScreen(&_vm->_graphicsMan->_foreground);
_vm->_system->updateScreen();
}
// If there's an already planned action, do nothing
if (_inputAction != -1) {
return false;
}
if (contained) {
// Change the mouse cursor
if (_newCursorStyle == 5) {
_newCursorStyle = cursor;
}
// If clicked with the mouse, jump to the specified address
if (_mouseClicked) {
_lastCursor = cursor;
_inputAction = address;
}
}
return contained;
}
void Script::loadgame(uint slot) {
Common::InSaveFile *file = SaveLoad::openForLoading(ConfMan.getActiveDomainName(), slot);
// Loading the variables. It is endian safe because they're byte variables
file->read(_variables, 0x400);
delete file;
// Hide the mouse cursor
_vm->_grvCursorMan->show(false);
}
void Script::savegame(uint slot) {
char save[15];
char newchar;
Common::OutSaveFile *file = SaveLoad::openForSaving(ConfMan.getActiveDomainName(), slot);
if (!file) {
debugC(9, kDebugScript, "Save file pointer is null");
GUI::MessageDialog dialog(_("Failed to save game"), _("OK"));
dialog.runModal();
return;
}
// Saving the variables. It is endian safe because they're byte variables
file->write(_variables, 0x400);
delete file;
// Cache the saved name
for (int i = 0; i < 15; i++) {
newchar = _variables[i] + 0x30;
if ((newchar < 0x30 || newchar > 0x39) && (newchar < 0x41 || newchar > 0x7A)) {
save[i] = '\0';
break;
} else {
save[i] = newchar;
}
}
_saveNames[slot] = save;
}
void Script::printString(Graphics::Surface *surface, const char *str) {
char message[15];
memset(message, 0, 15);
// Preprocess the string
for (int i = 0; i < 14; i++) {
if (str[i] <= 0x00 || str[i] == 0x24)
break;
message[i] = str[i];
}
Common::rtrim(message);
// Draw the string
_vm->_font->drawString(surface, message, 0, 16, 640, 0xE2, Graphics::kTextAlignCenter);
}
// OPCODES
void Script::o_invalid() {
error("Invalid opcode");
}
void Script::o_nop() {
debugC(1, kDebugScript, "NOP");
}
void Script::o_nop8() {
uint8 tmp = readScript8bits();
debugC(1, kDebugScript, "NOP8: 0x%02X", tmp);
}
void Script::o_nop16() {
uint16 tmp = readScript16bits();
debugC(1, kDebugScript, "NOP16: 0x%04X", tmp);
}
void Script::o_nop32() {
uint32 tmp = readScript32bits();
debugC(1, kDebugScript, "NOP32: 0x%08X", tmp);
}
void Script::o_nop8or16() {
uint16 tmp = readScript8or16bits();
debugC(1, kDebugScript, "NOP8OR16: 0x%04X", tmp);
}
void Script::o_playsong() { // 0x02
uint16 fileref = readScript16bits();
debugC(1, kDebugScript, "PlaySong(0x%04X): Play xmidi file", fileref);
if (fileref == 0x4C17) {
warning("this song is special somehow");
// don't save the reference?
}
_vm->_musicPlayer->playSong(fileref);
}
void Script::o_bf9on() { // 0x03
debugC(1, kDebugScript, "BF9ON: bitflag 9 turned on");
_bitflags |= 1 << 9;
}
void Script::o_palfadeout() {
debugC(1, kDebugScript, "PALFADEOUT");
_vm->_graphicsMan->fadeOut();
}
void Script::o_bf8on() { // 0x05
debugC(1, kDebugScript, "BF8ON: bitflag 8 turned on");
_bitflags |= 1 << 8;
}
void Script::o_bf6on() { // 0x06
debugC(1, kDebugScript, "BF6ON: bitflag 6 turned on");
_bitflags |= 1 << 6;
}
void Script::o_bf7on() { // 0x07
debugC(1, kDebugScript, "BF7ON: bitflag 7 turned on");
_bitflags |= 1 << 7;
}
void Script::o_setbackgroundsong() { // 0x08
uint16 fileref = readScript16bits();
debugC(1, kDebugScript, "SetBackgroundSong(0x%04X)", fileref);
_vm->_musicPlayer->setBackgroundSong(fileref);
}
void Script::o_videofromref() { // 0x09
uint16 fileref = readScript16bits();
// Show the debug information just when starting the playback
if (fileref != _videoRef) {
debugC(1, kDebugScript, "VIDEOFROMREF(0x%04X) (Not fully imp): Play video file from ref", fileref);
debugC(5, kDebugVideo, "Playing video 0x%04X via 0x09", fileref);
}
switch (fileref) {
case 0x1C03: // Trilobyte logo
case 0x1C04: // Virgin logo
case 0x1C05: // Credits
if (fileref != _videoRef) {
debugC(1, kDebugScript, "Use external file if available");
}
break;
case 0x400D: // floating objects in music room
case 0x5060: // a sound from gamwav?
case 0x5098: // a sound from gamwav?
case 0x2402: // House becomes book in intro?
case 0x1426: // Turn to face front in hall: played after intro
case 0x206D: // Cards on table puzzle (bedroom)
case 0x2001: // Coins on table puzzle (bedroom)
if (fileref != _videoRef) {
debugCN(1, kDebugScript, " (This video is special somehow!)");
warning("(This video (0x%04X) is special somehow!)", fileref);
}
}
if (fileref != _videoRef) {
debugCN(1, kDebugScript, "\n");
}
// Play the video
if (!playvideofromref(fileref)) {
// Move _currentInstruction back
_currentInstruction -= 3;
}
}
bool Script::playvideofromref(uint32 fileref) {
// It isn't the current video, open it
if (fileref != _videoRef) {
// Debug bitflags
debugCN(1, kDebugScript, "Play video 0x%04X (bitflags:", fileref);
for (int i = 15; i >= 0; i--) {
debugCN(1, kDebugScript, "%d", _bitflags & (1 << i)? 1 : 0);
if (i % 4 == 0) {
debugCN(1, kDebugScript, " ");
}
}
debugC(1, kDebugScript, " <- 0)");
// Close the previous video file
if (_videoFile) {
_videoRef = 0;
delete _videoFile;
}
// Try to open the new file
_videoFile = _vm->_resMan->open(fileref);
if (_videoFile) {
_videoRef = fileref;
// If teeth or mask cursor, and in main script, mark video prefer low-speed.
// Filename check as sometimes teeth used for puzzle movements (bishops)
if (_version == kGroovieT7G && (_lastCursor == 7 || _lastCursor == 4) && _scriptFile == "script.grv")
_bitflags |= (1 << 15);
_vm->_videoPlayer->load(_videoFile, _bitflags);
} else {
error("Couldn't open file");
return true;
}
_bitflags = 0;
// Reset the clicked mouse events
_eventMouseClicked = 0;
}
// Check if the user wants to skip the video
if ((_eventMouseClicked == 2) && (_videoSkipAddress != 0)) {
// Jump to the given address
_currentInstruction = _videoSkipAddress;
// Reset the skip address
_videoSkipAddress = 0;
// End the playback
return true;
}
// Video available, play one frame
if (_videoFile) {
bool endVideo = _vm->_videoPlayer->playFrame();
_vm->_musicPlayer->frameTick();
if (endVideo) {
// Close the file
delete _videoFile;
_videoFile = NULL;
_videoRef = 0;
// Clear the input events while playing the video
_eventMouseClicked = 0;
_eventKbdChar = 0;
// Newline
debugCN(1, kDebugScript, "\n");
}
// Let the caller know if the video has ended
return endVideo;
}
// If the file is closed, finish the playback
return true;
}
void Script::o_bf5on() { // 0x0A
debugC(1, kDebugScript, "BF5ON: bitflag 5 turned on");
_bitflags |= 1 << 5;
}
void Script::o_inputloopstart() { //0x0B
debugC(5, kDebugScript, "Input loop start");
// Reset the input action and the mouse cursor
_inputAction = -1;
_newCursorStyle = 5;
// Save the input loop address
_inputLoopAddress = _currentInstruction - 1;
// Save the current mouse state for the whole loop
_mouseClicked = (_eventMouseClicked == 1);
_eventMouseClicked = 0;
// Save the current pressed character for the whole loop
_kbdChar = _eventKbdChar;
_eventKbdChar = 0;
_vm->_musicPlayer->startBackground();
}
void Script::o_keyboardaction() {
uint8 val = readScript8bits();
uint16 address = readScript16bits();
debugC(5, kDebugScript, "Test key == 0x%02X @0x%04X", val, address);
// If there's an already planned action, do nothing
if (_inputAction != -1) {
return;
}
// Check the typed key
if (_kbdChar == val) {
// Exit the input loop
_inputLoopAddress = 0;
// Save the action address
_inputAction = address;
}
}
void Script::o_hotspot_rect() {
uint16 left = readScript16bits();
uint16 top = readScript16bits();
uint16 right = readScript16bits();
uint16 bottom = readScript16bits();
uint16 address = readScript16bits();
uint8 cursor = readScript8bits();
debugC(5, kDebugScript, "HOTSPOT-RECT(%d,%d,%d,%d) @0x%04X cursor=%d", left, top, right, bottom, address, cursor);
// Mark the specified rectangle
Common::Rect rect(left, top, right, bottom);
hotspot(rect, address, cursor);
}
void Script::o_hotspot_left() {
uint16 address = readScript16bits();
debugC(5, kDebugScript, "HOTSPOT-LEFT @0x%04X", address);
// Mark the leftmost 100 pixels of the game area
Common::Rect rect(0, 80, 100, 400);
hotspot(rect, address, 1);
}
void Script::o_hotspot_right() {
uint16 address = readScript16bits();
debugC(5, kDebugScript, "HOTSPOT-RIGHT @0x%04X", address);
// Mark the rightmost 100 pixels of the game area
Common::Rect rect(540, 80, 640, 400);
hotspot(rect, address, 2);
}
void Script::o_hotspot_center() {
uint16 address = readScript16bits();
debugC(5, kDebugScript, "HOTSPOT-CENTER @0x%04X", address);
// Mark the centermost 240 pixels of the game area
Common::Rect rect(200, 80, 440, 400);
hotspot(rect, address, 0);
}
void Script::o_hotspot_current() {
uint16 address = readScript16bits();
debugC(5, kDebugScript, "HOTSPOT-CURRENT @0x%04X", address);
// The original interpreter doesn't check the position, so accept the
// whole screen
Common::Rect rect(0, 0, 640, 480);
hotspot(rect, address, 0);
}
void Script::o_inputloopend() {
debugC(5, kDebugScript, "Input loop end");
// Handle the predefined hotspots
if (_hotspotTopAction) {
Common::Rect rect(0, 0, 640, 80);
hotspot(rect, _hotspotTopAction, _hotspotTopCursor);
}
if (_hotspotBottomAction) {
Common::Rect rect(0, 400, 640, 480);
hotspot(rect, _hotspotBottomAction, _hotspotBottomCursor);
}
if (_hotspotRightAction) {
Common::Rect rect(560, 0, 640, 480);
hotspot(rect, _hotspotRightAction, 2);
}
if (_hotspotLeftAction) {
Common::Rect rect(0, 0, 80, 480);
hotspot(rect, _hotspotLeftAction, 1);
}
// Actually execute the planned action
if (_inputAction != -1) {
// Jump to the planned address
_currentInstruction = _inputAction;
// Exit the input loop
_inputLoopAddress = 0;
_vm->_grvCursorMan->show(false);
// Force immediate hiding of the mouse cursor (required when the next
// video just contains audio)
_vm->_graphicsMan->change();
}
// Nothing to do
if (_inputLoopAddress) {
if (_newCursorStyle != _vm->_grvCursorMan->getStyle()) {
_vm->_grvCursorMan->setStyle(_newCursorStyle);
}
_vm->_grvCursorMan->show(true);
// Go back to the begining of the loop
_currentInstruction = _inputLoopAddress;
// There's nothing to do until we get some input
_vm->waitForInput();
}
}
void Script::o_random() {
uint16 varnum = readScript8or16bits();
uint8 maxnum = readScript8bits();
debugC(1, kDebugScript, "RANDOM: var[0x%04X] = rand(%d)", varnum, maxnum);
setVariable(varnum, _random.getRandomNumber(maxnum));
}
void Script::o_jmp() {
uint16 address = readScript16bits();
debugC(1, kDebugScript, "JMP @0x%04X", address);
// Set the current address
_currentInstruction = address;
}
void Script::o_loadstring() {
uint16 varnum = readScript8or16bits();
debugCN(1, kDebugScript, "LOADSTRING var[0x%04X..] =", varnum);
do {
setVariable(varnum++, readScriptChar(true, true, true));
debugCN(1, kDebugScript, " 0x%02X", _variables[varnum - 1]);
} while (!(getCodeByte(_currentInstruction - 1) & 0x80));
debugCN(1, kDebugScript, "\n");
}
void Script::o_ret() {
uint8 val = readScript8bits();
debugC(1, kDebugScript, "RET %d", val);
// Set the return value
setVariable(0x102, val);
// Get the return address
if (_stacktop > 0) {
_stacktop--;
_currentInstruction = _stack[_stacktop];
} else {
error("Return: Stack is empty");
}
}
void Script::o_call() {
uint16 address = readScript16bits();
debugC(1, kDebugScript, "CALL @0x%04X", address);
// Save return address in the call stack
_stack[_stacktop] = _currentInstruction;
_stacktop++;
// Change the current instruction
_currentInstruction = address;
}
void Script::o_sleep() {
uint16 time = readScript16bits();
debugC(1, kDebugScript, "SLEEP 0x%04X", time);
_vm->_system->delayMillis(time * 3);
}
void Script::o_strcmpnejmp() { // 0x1A
uint16 varnum = readScript8or16bits();
uint8 result = 1;
debugCN(1, kDebugScript, "STRCMP-NEJMP: var[0x%04X..],", varnum);
do {
uint8 val = readScriptChar(true, true, true);
if (_variables[varnum] != val) {
result = 0;
}
varnum++;
debugCN(1, kDebugScript, " 0x%02X", val);
} while (!(getCodeByte(_currentInstruction - 1) & 0x80));
uint16 address = readScript16bits();
if (!result) {
debugC(1, kDebugScript, " jumping to @0x%04X", address);
_currentInstruction = address;
} else {
debugC(1, kDebugScript, " not jumping");
}
}
void Script::o_xor_obfuscate() {
uint16 varnum = readScript8or16bits();
debugCN(1, kDebugScript, "XOR OBFUSCATE: var[0x%04X..] = ", varnum);
do {
uint8 val = readScript8bits();
_firstbit = ((val & 0x80) != 0);
val &= 0x4F;
setVariable(varnum, _variables[varnum] ^ val);
debugCN(1, kDebugScript, "%c", _variables[varnum]);
varnum++;
} while (!_firstbit);
debugCN(1, kDebugScript, "\n");
}
void Script::o_vdxtransition() { // 0x1C
uint16 fileref = readScript16bits();
// Show the debug information just when starting the playback
if (fileref != _videoRef) {
debugC(1, kDebugScript, "VDX transition fileref = 0x%04X", fileref);
debugC(1, kDebugVideo, "Playing video 0x%04X with transition", fileref);
}
// Set bit 1
_bitflags |= 1 << 1;
// Clear bit 7
_bitflags &= ~(1 << 7);
// Set bit 2 if _firstbit
if (_firstbit) {
_bitflags |= 1 << 2;
}
// Play the video
if (!playvideofromref(fileref)) {
// Move _currentInstruction back
_currentInstruction -= 3;
}
}
void Script::o_swap() {
uint16 varnum1 = readScript8or16bits();
uint16 varnum2 = readScript16bits();
debugC(1, kDebugScript, "SWAP var[0x%04X] <-> var[0x%04X]", varnum1, varnum2);
uint8 tmp = _variables[varnum1];
setVariable(varnum1, _variables[varnum2]);
setVariable(varnum2, tmp);
}
void Script::o_inc() {
uint16 varnum = readScript8or16bits();
debugC(1, kDebugScript, "INC var[0x%04X]", varnum);
setVariable(varnum, _variables[varnum] + 1);
}
void Script::o_dec() {
uint16 varnum = readScript8or16bits();
debugC(1, kDebugScript, "DEC var[0x%04X]", varnum);
setVariable(varnum, _variables[varnum] - 1);
}
void Script::o_strcmpnejmp_var() { // 0x21
uint16 data = readScriptVar();
if (data > 9) {
data -= 7;
}
data = _variables[data + 0x19];
bool stringsmatch = 1;
do {
if (_variables[data++] != readScriptChar(true, true, true)) {
stringsmatch = 0;
}
} while (!(getCodeByte(_currentInstruction - 1) & 0x80));
uint16 offset = readScript16bits();
if (!stringsmatch) {
_currentInstruction = offset;
}
}
void Script::o_copybgtofg() { // 0x22
debugC(1, kDebugScript, "COPY_BG_TO_FG");
memcpy(_vm->_graphicsMan->_foreground.getPixels(), _vm->_graphicsMan->_background.getPixels(), 640 * _vm->_graphicsMan->_foreground.h);
}
void Script::o_strcmpeqjmp() { // 0x23
uint16 varnum = readScript8or16bits();
uint8 result = 1;
debugCN(1, kDebugScript, "STRCMP-EQJMP: var[0x%04X..],", varnum);
do {
uint8 val = readScriptChar(true, true, true);
if (_variables[varnum] != val) {
result = 0;
}
varnum++;
debugCN(1, kDebugScript, " 0x%02X", val);
} while (!(getCodeByte(_currentInstruction - 1) & 0x80));
uint16 address = readScript16bits();
if (result) {
debugC(1, kDebugScript, " jumping to @0x%04X", address);
_currentInstruction = address;
} else {
debugC(1, kDebugScript, " not jumping");
}
}
void Script::o_mov() {
uint16 varnum1 = readScript8or16bits();
uint16 varnum2 = readScript16bits();
debugC(1, kDebugScript, "MOV var[0x%04X] = var[0x%04X]", varnum1, varnum2);
setVariable(varnum1, _variables[varnum2]);
}