Merge branch 'master' into teenagentRefactor

Conflicts:
	engines/teenagent/callbacks.cpp

1 files changed, 59 insertions, 0 deletions

diff --git a/engines/gob/backbuffer.h b/engines/gob/backbuffer.h
new file mode 100644
index 0000000000..c978689e9f
--- /dev/null
+++ b/engines/gob/backbuffer.h
@@ -0,0 +1,59 @@
+/* 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.
+ *
+ */
+
+#ifndef GOB_BACKBUFFER_H
+#define GOB_BACKBUFFER_H
+
+#include "common/system.h"
+
+namespace Gob {
+
+class Surface;
+
+class BackBuffer {
+public:
+	BackBuffer();
+	~BackBuffer();
+
+protected:
+	void trashBuffer();
+	void resizeBuffer(uint16 width, uint16 height);
+
+	bool saveScreen   (const Surface &dest, int16 &left, int16 &top, int16 &right, int16 &bottom);
+	bool restoreScreen(      Surface &dest, int16 &left, int16 &top, int16 &right, int16 &bottom);
+
+	bool hasBuffer() const;
+	bool hasSavedBackground() const;
+
+private:
+	Surface *_background; ///< The saved background.
+	bool _saved;          ///< Was the background saved?
+
+	int16 _saveLeft;   ///< The left position of the saved background.
+	int16 _saveTop;    ///< The top of the saved background.
+	int16 _saveRight;  ///< The right position of the saved background.
+	int16 _saveBottom; ///< The bottom position of the saved background.
+};
+
+} // End of namespace Gob
+
+#endif // GOB_BACKBUFFER_H