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engines/ags/engine/ac/dynobj/script_viewport.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 "ags/engine/ac/dynobj/script_viewport.h"
+#include "ags/engine/ac/dynobj/dynobj_manager.h"
+#include "ags/engine/ac/game_state.h"
+#include "ags/shared/util/bbop.h"
+#include "ags/shared/util/stream.h"
+#include "ags/globals.h"
+
+namespace AGS3 {
+
+using namespace AGS::Shared;
+
+ScriptViewport::ScriptViewport(int id) : _id(id) {
+}
+
+const char *ScriptViewport::GetType() {
+	return "Viewport2";
+}
+
+int ScriptViewport::Dispose(void * /*address*/, bool force) {
+	// Note that ScriptViewport is a reference to actual Viewport object,
+	// and this deletes the reference, while viewport may remain in GameState.
+	delete this;
+	return 1;
+}
+
+size_t ScriptViewport::CalcSerializeSize(const void * /*address*/) {
+	return sizeof(int32_t);
+}
+
+void ScriptViewport::Serialize(const void * /*address*/, Stream *out) {
+	out->WriteInt32(_id);
+}
+
+void ScriptViewport::Unserialize(int index, Stream *in, size_t data_sz) {
+	_id = in->ReadInt32();
+	ccRegisterUnserializedObject(index, this, this);
+}
+
+ScriptViewport *Viewport_Unserialize(int handle, Stream *in, size_t data_sz) {
+	// The way it works now, we must not create a new script object,
+	// but acquire one from the GameState, which keeps the first reference.
+	// This is essential because GameState should be able to invalidate any
+	// script references when Viewport gets removed.
+	const int id = in->ReadInt32();
+	if (id >= 0) {
+		auto scview = _GP(play).RegisterRoomViewport(id, handle);
+		if (scview)
+			return scview;
+	}
+	return new ScriptViewport(-1); // make invalid reference
+}
+
+} // namespace AGS3