Initial commit

engines/illusions/threads/scriptthread.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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "illusions/illusions.h"
+#include "illusions/threads/scriptthread.h"
+#include "illusions/scriptopcodes.h"
+
+namespace Illusions {
+
+// ScriptThread
+
+ScriptThread::ScriptThread(IllusionsEngine *vm, uint32 threadId, uint32 callingThreadId, uint notifyFlags,
+	byte *scriptCodeIp, uint32 value8, uint32 valueC, uint32 value10)
+	: Thread(vm, threadId, callingThreadId, notifyFlags), _scriptCodeIp(scriptCodeIp), _value8(value8),
+	_valueC(valueC), _value10(value10), _sequenceStalled(0) {
+	_type = kTTScriptThread;
+	_sceneId = _vm->getCurrentScene();
+}
+
+int ScriptThread::onUpdate() {
+	OpCall opCall;
+	opCall._result = kTSRun;
+	opCall._callerThreadId = _threadId;
+	while (!_terminated && opCall._result == kTSRun) {
+		loadOpcode(opCall);
+		execOpcode(opCall);
+		_scriptCodeIp += opCall._deltaOfs;
+	}
+	if (_terminated)
+		opCall._result = kTSTerminate;
+	return opCall._result;
+}
+
+void ScriptThread::loadOpcode(OpCall &opCall) {
+	if (_vm->getGameId() == kGameIdDuckman) {
+		opCall._op = _scriptCodeIp[0] & 0x7F;
+		opCall._opSize = _scriptCodeIp[1];
+		opCall._threadId = _scriptCodeIp[0] & 0x80 ? _threadId : 0;
+	} else {
+		opCall._op = _scriptCodeIp[0];
+		opCall._opSize = _scriptCodeIp[1] >> 1;
+		opCall._threadId = _scriptCodeIp[1] & 1 ? _threadId : 0;
+	}
+	opCall._code = _scriptCodeIp + 2;
+	opCall._deltaOfs = opCall._opSize;
+}
+
+void ScriptThread::execOpcode(OpCall &opCall) {
+	_vm->_scriptOpcodes->execOpcode(this, opCall);
+}
+
+} // End of namespace Illusions