1 files changed, 87 insertions, 0 deletions
diff --git a/engines/bladerunner/zbuffer.h b/engines/bladerunner/zbuffer.h
new file mode 100644
index 0000000000..5c771b1381
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+++ b/engines/bladerunner/zbuffer.h
@@ -0,0 +1,87 @@
+/* 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 BLADERUNNER_ZBUFFER_H
+#define BLADERUNNER_ZBUFFER_H
+
+#include "bladerunner/bladerunner.h"
+
+#include "common/rect.h"
+
+namespace BladeRunner {
+
+#define MAX_DIRTY_RECTS 20
+
+class ZBufferDirtyRects {
+	int          _count;
+	Common::Rect _rects[MAX_DIRTY_RECTS];
+
+public:
+	ZBufferDirtyRects() :
+		_count(0)
+	{}
+
+	void reset();
+	bool add(Common::Rect rect);
+	void extendExisting();
+	int getCount();
+	bool popRect(Common::Rect *rect);
+};
+
+class ZBuffer {
+	int     _width;
+	int     _height;
+
+	uint16 *_zbuf1;
+	uint16 *_zbuf2;
+
+	ZBufferDirtyRects *_dirtyRects;;
+
+	bool _disabled;
+
+public:
+	ZBuffer();
+	~ZBuffer();
+
+	void init(int width, int height);
+	bool decodeData(const uint8 *data, int size);
+
+	uint16 *getData();
+	uint16 getZValue(int x, int y);
+
+private:
+	void reset();
+	void blit(Common::Rect rect);
+
+public:
+	void mark(Common::Rect rect);
+	void clean();
+	void resetUpdates();
+
+	// Only called from Scene::resume which is not yet implemented
+	void disable();
+	void enable();
+};
+
+} // End of namespace BladeRunner
+
+#endif