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engines/glk/zcode/zcode.h

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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/>.
+ *
+ */
+
+#ifndef GLK_ZCODE_ZCODE
+#define GLK_ZCODE_ZCODE
+
+#include "glk/zcode/processor.h"
+
+namespace Glk {
+namespace ZCode {
+
+class FrotzScreen;
+
+/**
+ * Frotz interpreter for Z-code games
+ */
+class ZCode : public Processor {
+	friend class FrotzScreen;
+protected:
+	/**
+	 * Setup the video mode
+	 */
+	void initGraphicsMode() override;
+
+	/**
+	 * Create the screen class
+	 */
+	Screen *createScreen() override;
+public:
+	/**
+	 * Constructor
+	 */
+	ZCode(OSystem *syst, const GlkGameDescription &gameDesc);
+
+	/**
+	 * Destructor
+	 */
+	~ZCode() override;
+
+	/**
+	 * Initialization
+	 */
+	void initialize();
+
+	/**
+	 * Returns the running interpreter type
+	 */
+	InterpreterType getInterpreterType() const override { return INTERPRETER_ZCODE; }
+
+	/**
+	 * Execute the game
+	 */
+	void runGame() override;
+
+	/**
+	 * Indicates whether an autosave can currently be saved.
+	 */
+	bool canSaveAutosaveCurrently() override {
+		/* ZCode saves also include the execution stack.
+		 * So I don't know how to do autosaves in the background
+		 * without ending up with an invalid stack state
+		 */
+		return false;
+	}
+
+	/**
+	 * Load a savegame from a given slot
+	 */
+	Common::Error loadGameState(int slot) override;
+
+	/**
+	 * Save the game to a given slot
+	 */
+	Common::Error saveGameState(int slot, const Common::String &desc, bool isAutosave = false) override;
+
+	/**
+	 * Loading method not used for Frotz sub-engine
+	 */
+	Common::Error readSaveData(Common::SeekableReadStream *rs) override { return Common::kReadingFailed; }
+
+	/**
+	 * Saving method not used for Frotz sub-engine
+	 */
+	Common::Error writeGameData(Common::WriteStream *ws) override { return Common::kWritingFailed; }
+
+};
+
+extern ZCode *g_vm;
+
+} // End of namespace ZCode
+} // End of namespace Glk
+
+#endif