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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.
*
* $URL$
* $Id$
*
*/
#include "kyra/script_tim.h"
#include "kyra/script.h"
#include "kyra/resource.h"
#include "common/endian.h"
namespace Kyra {
TIMInterpreter::TIMInterpreter(KyraEngine_v1 *vm, OSystem *system) : _vm(vm), _system(system), _currentTim(0) {
#define COMMAND(x) { &TIMInterpreter::x, #x }
#define COMMAND_UNIMPL() { 0, 0 }
static const CommandEntry commandProcs[] = {
// 0x00
COMMAND(cmd_initFunc0),
COMMAND(cmd_stopCurFunc),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
// 0x04
COMMAND(cmd_initFunc),
COMMAND(cmd_stopFunc),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
// 0x08
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
// 0x0C
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
// 0x10
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
// 0x14
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND_UNIMPL(),
COMMAND(cmd_resetAllRuntimes),
// 0x18
COMMAND(cmd_return<1>),
COMMAND(cmd_execOpcode),
COMMAND(cmd_initFuncNow),
COMMAND(cmd_stopFuncNow),
// 0x1C
COMMAND(cmd_return<1>),
COMMAND(cmd_return<1>),
COMMAND(cmd_return<-1>)
};
_commands = commandProcs;
_commandsSize = ARRAYSIZE(commandProcs);
}
TIM *TIMInterpreter::load(const char *filename, const Common::Array<const TIMOpcode*> *opcodes) {
if (!_vm->resource()->exists(filename))
return 0;
ScriptFileParser file(filename, _vm->resource());
if (!file)
error("Couldn't open TIM file '%s'", filename);
uint32 formBlockSize = file.getFORMBlockSize();
if (formBlockSize == 0xFFFFFFFF)
error("No FORM chunk found in TIM file '%s'", filename);
if (formBlockSize < 20)
error("TIM file '%s' FORM chunk size smaller than 20", filename);
TIM *tim = new TIM;
assert(tim);
memset(tim, 0, sizeof(TIM));
tim->procFunc = -1;
tim->opcodes = opcodes;
uint32 avtlChunkSize = file.getIFFBlockSize(AVTL_CHUNK);
uint32 textChunkSize = file.getIFFBlockSize(TEXT_CHUNK);
tim->avtl = new uint16[avtlChunkSize/2];
if (textChunkSize != 0xFFFFFFFF)
tim->text = new byte[textChunkSize];
if (!file.loadIFFBlock(AVTL_CHUNK, tim->avtl, avtlChunkSize))
error("Couldn't read AVTL chunk in TIM file '%s'", filename);
if (textChunkSize != 0xFFFFFFFF && !file.loadIFFBlock(TEXT_CHUNK, tim->text, textChunkSize))
error("Couldn't read TEXT chunk in TIM file '%s'", filename);
avtlChunkSize >>= 1;
for (uint i = 0; i < avtlChunkSize; ++i)
tim->avtl[i] = READ_LE_UINT16(tim->avtl + i);
int num = (avtlChunkSize < TIM::kCountFuncs) ? avtlChunkSize : (int)TIM::kCountFuncs;
for (int i = 0; i < num; ++i)
tim->func[i].avtl = tim->avtl + tim->avtl[i];
return tim;
}
void TIMInterpreter::unload(TIM *&tim) const {
if (!tim)
return;
delete[] tim->text;
delete[] tim->avtl;
delete tim;
tim = 0;
}
void TIMInterpreter::exec(TIM *tim, bool loop) {
if (!tim)
return;
_currentTim = tim;
if (!_currentTim->func[0].ip) {
_currentTim->func[0].ip = _currentTim->func[0].avtl;
_currentTim->func[0].nextTime = _currentTim->func[0].lastTime = _system->getMillis();
}
do {
for (_currentFunc = 0; _currentFunc < TIM::kCountFuncs; ++_currentFunc) {
TIM::Function &cur = _currentTim->func[_currentFunc];
if (_currentTim->procFunc != -1)
execCommand(28, &_currentTim->procParam);
bool running = true;
while (cur.ip && cur.nextTime <= _system->getMillis() && running) {
int8 opcode = int8(cur.ip[2] & 0xFF);
switch (execCommand(opcode, cur.ip + 3)) {
case -1:
loop = false;
running = false;
_currentFunc = 11;
break;
case -2:
running = false;
break;
case -3:
_currentTim->procFunc = _currentFunc;
break;
default:
break;
}
if (cur.ip) {
cur.ip += cur.ip[0];
cur.lastTime = cur.nextTime;
cur.nextTime += cur.ip[1] * _vm->tickLength();
}
}
}
} while (loop);
}
void TIMInterpreter::refreshTimersAfterPause(uint32 elapsedTime) {
if (!_currentTim)
return;
for (int i = 0; i < TIM::kCountFuncs; i++) {
if (_currentTim->func[i].lastTime)
_currentTim->func[i].lastTime += elapsedTime;
if (_currentTim->func[i].nextTime)
_currentTim->func[i].nextTime += elapsedTime;
}
}
int TIMInterpreter::execCommand(int cmd, const uint16 *param) {
if (cmd < 0 || cmd >= _commandsSize) {
warning("Calling unimplemented TIM command %d", cmd);
return 0;
}
if (_commands[cmd].proc == 0) {
warning("Calling unimplemented TIM command %d", cmd);
return 0;
}
debugC(5, kDebugLevelScript, "TIMInterpreter::%s(%p)", _commands[cmd].desc, (const void*)param);
return (this->*_commands[cmd].proc)(param);
}
int TIMInterpreter::cmd_initFunc0(const uint16 *param) {
_currentTim->func[0].ip = _currentTim->func[0].avtl;
_currentTim->func[0].lastTime = _system->getMillis();
return 1;
}
int TIMInterpreter::cmd_stopCurFunc(const uint16 *param) {
if (_currentFunc < TIM::kCountFuncs)
_currentTim->func[_currentFunc].ip = 0;
if (!_currentFunc)
_finished = true;
return -2;
}
int TIMInterpreter::cmd_initFunc(const uint16 *param) {
uint16 func = *param;
assert(func < TIM::kCountFuncs);
if (_currentTim->func[func].avtl)
_currentTim->func[func].ip = _currentTim->func[func].avtl;
else
_currentTim->func[func].avtl = _currentTim->func[func].ip = _currentTim->avtl + _currentTim->avtl[func];
return 1;
}
int TIMInterpreter::cmd_stopFunc(const uint16 *param) {
uint16 func = *param;
assert(func < TIM::kCountFuncs);
_currentTim->func[func].ip = 0;
return 1;
}
int TIMInterpreter::cmd_resetAllRuntimes(const uint16 *param) {
for (int i = 0; i < TIM::kCountFuncs; ++i) {
if (_currentTim->func[i].ip)
_currentTim->func[i].nextTime = _system->getMillis();
}
return 1;
}
int TIMInterpreter::cmd_execOpcode(const uint16 *param) {
if (!_currentTim->opcodes) {
warning("Trying to execute TIM opcode without opcode list");
return 0;
}
uint16 opcode = *param++;
if (opcode > _currentTim->opcodes->size()) {
warning("Calling unimplemented TIM opcode(0x%.02X/%d)", opcode, opcode);
return 0;
}
return (*(*_currentTim->opcodes)[opcode])(_currentTim, param);
}
int TIMInterpreter::cmd_initFuncNow(const uint16 *param) {
uint16 func = *param;
assert(func < TIM::kCountFuncs);
_currentTim->func[func].ip = _currentTim->func[func].avtl;
_currentTim->func[func].lastTime = _currentTim->func[func].nextTime = _system->getMillis();
return 1;
}
int TIMInterpreter::cmd_stopFuncNow(const uint16 *param) {
uint16 func = *param;
assert(func < TIM::kCountFuncs);
_currentTim->func[func].ip = 0;
_currentTim->func[func].lastTime = _currentTim->func[func].nextTime = _system->getMillis();
return 1;
}
} // end of namespace Kyra
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