Placed all the game feature detection code in a separate class

svn-id: r47850

1 files changed, 121 insertions, 0 deletions

diff --git a/engines/sci/engine/features.h b/engines/sci/engine/features.h
new file mode 100644
index 0000000000..11948a5987
--- /dev/null
+++ b/engines/sci/engine/features.h
@@ -0,0 +1,121 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef SCI_INCLUDE_FEATURES_H
+#define SCI_INCLUDE_FEATURES_H
+
+#include "sci/resource.h"
+#include "sci/engine/seg_manager.h"
+
+namespace Sci {
+
+enum FeatureDetection {
+	kDetectGfxFunctions = 0,
+	kDetectMoveCountType = 1,
+	kDetectSoundType = 2,
+	kDetectSetCursorType = 3,
+	kDetectLofsType = 4,
+	kDetectSci21KernelTable = 5
+};
+
+class GameFeatures {
+public:
+	GameFeatures(SegManager *segMan, Kernel *kernel);
+	~GameFeatures() {}
+
+	void setGameInfo(reg_t gameObj, Common::String gameId);
+
+	/**
+	 * Autodetects the DoSound type
+	 * @return DoSound type, SCI_VERSION_0_EARLY / SCI_VERSION_0_LATE /
+	 *                       SCI_VERSION_1_EARLY / SCI_VERSION_1_LATE
+	 */
+	SciVersion detectDoSoundType();
+
+	/**
+	 * Autodetects the SetCursor type
+	 * @return SetCursor type, SCI_VERSION_0_EARLY / SCI_VERSION_1_1
+	 */
+	SciVersion detectSetCursorType();
+
+	/**
+	 * Autodetects the Lofs type
+	 * @return Lofs type, SCI_VERSION_0_EARLY / SCI_VERSION_1_MIDDLE / SCI_VERSION_1_1
+	 */
+	SciVersion detectLofsType();
+
+	/**
+	 * Autodetects the graphics functions used
+	 * @return Graphics functions type, SCI_VERSION_0_EARLY / SCI_VERSION_0_LATE
+	 */
+	SciVersion detectGfxFunctionsType();
+	
+#ifdef ENABLE_SCI32
+	/**
+	 * Autodetects the kernel functions used in SCI2.1
+	 * @return Graphics functions type, SCI_VERSION_2 / SCI_VERSION_2_1
+	 */
+	SciVersion detectSci21KernelType();
+#endif
+
+	/**
+	 * Applies to all versions before 0.000.502
+	 * Old SCI versions used to interpret the third DrawPic() parameter inversely,
+	 * with the opposite default value (obviously).
+	 * Also, they used 15 priority zones from 42 to 200 instead of 14 priority
+	 * zones from 42 to 190.
+	 */
+	bool usesOldGfxFunctions() { return detectGfxFunctionsType() == SCI_VERSION_0_EARLY; }
+
+	/**
+	 * Autodetects the Bresenham routine used in the actor movement functions
+	 * @return Move count type, kIncrementMoveCnt / kIgnoreMoveCnt
+	 */
+	MoveCountType detectMoveCountType();
+
+	bool handleMoveCount() { return detectMoveCountType() == kIncrementMoveCount; }
+
+	bool usesCdTrack() { return _usesCdTrack; }
+
+private:
+	bool autoDetectFeature(FeatureDetection featureDetection, int methodNum = -1);
+
+	SciVersion _doSoundType, _setCursorType, _lofsType, _gfxFunctionsType;
+#ifdef ENABLE_SCI32
+	SciVersion _sci21KernelType;
+#endif
+
+	MoveCountType _moveCountType;
+	bool _usesCdTrack;
+
+	SegManager *_segMan;
+	Kernel *_kernel;
+	reg_t _gameObj;
+	Common::String _gameId;
+};
+
+} // End of namespace Sci
+
+#endif // SCI_INCLUDE_ENGINE_H