mirror of
https://github.com/libretro/scummvm.git
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274 lines
6.9 KiB
C++
274 lines
6.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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 "kyra/script_tim.h"
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#include "kyra/script.h"
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#include "common/endian.h"
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namespace Kyra {
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TIMInterpreter::TIMInterpreter(KyraEngine *vm, OSystem *system) : _vm(vm), _system(system), _currentTim(0) {
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#define COMMAND(x) { &TIMInterpreter::x, #x }
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#define COMMAND_UNIMPL() { 0, 0 }
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static CommandEntry commandProcs[] = {
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// 0x00
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COMMAND(cmd_startFunc0Now),
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COMMAND(cmd_stopCurFunc),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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// 0x04
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COMMAND(cmd_initFunc),
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COMMAND(cmd_stopFunc),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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// 0x08
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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// 0x0C
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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// 0x10
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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// 0x14
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND_UNIMPL(),
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COMMAND(cmd_resetAllNextTime),
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// 0x18
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COMMAND(cmd_return<1>),
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COMMAND(cmd_execOpcode),
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COMMAND(cmd_initFuncNow),
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COMMAND(cmd_stopFuncNow),
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// 0x1C
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COMMAND(cmd_return<1>),
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COMMAND(cmd_return<1>),
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COMMAND(cmd_return<-1>)
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};
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_commands = commandProcs;
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_commandsSize = ARRAYSIZE(commandProcs);
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}
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TIM *TIMInterpreter::load(const char *filename, const Common::Array<const TIMOpcode*> *opcodes) {
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ScriptFileParser file(filename, _vm->resource());
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if (!file)
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error("Couldn't open TIM file '%s'", filename);
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uint32 formBlockSize = file.getFORMBlockSize();
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if (formBlockSize == 0xFFFFFFFF) {
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warning("No FORM chunk found in TIM file '%s'", filename);
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return 0;
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}
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if (formBlockSize < 20) {
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warning("TIM file '%s' FORM chunk size smaller than 20", filename);
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return 0;
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}
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TIM *tim = new TIM;
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assert(tim);
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memset(tim, 0, sizeof(TIM));
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tim->procFunc = -1;
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tim->opcodes = opcodes;
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uint32 avtlChunkSize = file.getIFFBlockSize(AVTL_CHUNK);
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uint32 textChunkSize = file.getIFFBlockSize(TEXT_CHUNK);
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tim->avtl = new uint16[avtlChunkSize/2];
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if (textChunkSize != 0xFFFFFFFF)
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tim->text = new byte[textChunkSize];
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if (!file.loadIFFBlock(AVTL_CHUNK, tim->avtl, avtlChunkSize))
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error("Couldn't read AVTL chunk in TIM file '%s'", filename);
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if (textChunkSize != 0xFFFFFFFF && !file.loadIFFBlock(TEXT_CHUNK, tim->text, textChunkSize))
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error("Couldn't read TEXT chunk in TIM file '%s'", filename);
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avtlChunkSize >>= 1;
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for (uint i = 0; i < avtlChunkSize; ++i)
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tim->avtl[i] = READ_LE_UINT16(tim->avtl + i);
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for (int i = 0; i < 10; ++i)
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tim->func[i].avtl = tim->avtl + tim->avtl[i];
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return tim;
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}
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void TIMInterpreter::unload(TIM *&tim) const {
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if (!tim)
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return;
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delete [] tim->text;
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delete [] tim->avtl;
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delete tim;
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tim = 0;
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}
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void TIMInterpreter::exec(TIM *tim, bool loop) {
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if (!tim)
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return;
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_currentTim = tim;
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if (!_currentTim->func[0].ip) {
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_currentTim->func[0].ip = _currentTim->func[0].avtl;
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_currentTim->func[0].nextTime = _currentTim->func[0].lastTime = _system->getMillis();
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}
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do {
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for (_currentFunc = 0; _currentFunc < 10; ++_currentFunc) {
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TIM::Function &cur = _currentTim->func[_currentFunc];
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if (_currentTim->procFunc != -1)
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execCommand(28, &_currentTim->unkFlag);
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bool running = true;
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while (cur.ip && cur.nextTime <= _system->getMillis() && running) {
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int8 opcode = int8(cur.ip[2] & 0xFF);
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switch (execCommand(opcode, cur.ip + 3)) {
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case -1:
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loop = false;
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running = false;
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_currentFunc = 11;
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break;
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case -2:
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running = false;
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break;
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case -3:
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_currentTim->procFunc = _currentFunc;
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break;
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default:
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break;
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}
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if (cur.ip) {
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cur.ip += cur.ip[0];
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cur.lastTime = cur.nextTime;
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cur.nextTime += cur.ip[1] * _vm->tickLength();
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}
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}
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}
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} while (loop);
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}
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int TIMInterpreter::execCommand(int cmd, const uint16 *param) {
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if (cmd < 0 || cmd >= _commandsSize) {
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warning("Calling unimplemented TIM command %d", cmd);
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return 0;
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}
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if (_commands[cmd].proc == 0) {
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warning("Calling unimplemented TIM command %d", cmd);
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return 0;
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}
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debugC(5, kDebugLevelScript, "TIMInterpreter::%s(%p)", _commands[cmd].desc, (const void*)param);
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return (this->*_commands[cmd].proc)(param);
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}
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int TIMInterpreter::cmd_startFunc0Now(const uint16 *param) {
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_currentTim->func[0].ip = _currentTim->func[0].avtl;
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_currentTim->func[0].lastTime = _system->getMillis();
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return 1;
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}
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int TIMInterpreter::cmd_stopCurFunc(const uint16 *param) {
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if (_currentFunc < 10)
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_currentTim->func[_currentFunc].ip = 0;
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if (!_currentFunc)
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_finished = true;
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return -2;
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}
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int TIMInterpreter::cmd_initFunc(const uint16 *param) {
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uint16 func = *param;
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assert(func < 10);
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if (_currentTim->func[func].avtl)
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_currentTim->func[func].ip = _currentTim->func[func].avtl;
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else
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_currentTim->func[func].avtl = _currentTim->func[func].ip = _currentTim->avtl + _currentTim->avtl[func];
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return 1;
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}
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int TIMInterpreter::cmd_stopFunc(const uint16 *param) {
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uint16 func = *param;
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assert(func < 10);
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_currentTim->func[func].ip = 0;
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return 1;
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}
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int TIMInterpreter::cmd_resetAllNextTime(const uint16 *param) {
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for (int i = 0; i < 10; ++i) {
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if (_currentTim->func[i].ip)
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_currentTim->func[i].nextTime = _system->getMillis();
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}
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return 1;
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}
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int TIMInterpreter::cmd_execOpcode(const uint16 *param) {
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if (!_currentTim->opcodes) {
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warning("Trying to execute TIM opcode without opcode list");
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return 0;
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}
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uint16 opcode = *param++;
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if (opcode > _currentTim->opcodes->size()) {
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warning("calling unimplemented opcode(0x%.02X/%d)", opcode, opcode);
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return 0;
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}
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return (*(*_currentTim->opcodes)[opcode])(_currentTim, param);
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}
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int TIMInterpreter::cmd_initFuncNow(const uint16 *param) {
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uint16 func = *param;
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assert(func < 10);
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_currentTim->func[func].ip = _currentTim->func[func].avtl;
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_currentTim->func[func].lastTime = _currentTim->func[func].nextTime = _system->getMillis();
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return 1;
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}
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int TIMInterpreter::cmd_stopFuncNow(const uint16 *param) {
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uint16 func = *param;
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assert(func < 10);
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_currentTim->func[func].ip = 0;
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_currentTim->func[func].lastTime = _currentTim->func[func].nextTime = _system->getMillis();
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return 1;
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}
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} // end of namespace Kyra
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