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diff --git a/linden/indra/llwindow/lldxhardware.h b/linden/indra/llwindow/lldxhardware.h
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+/** 
+ * @file lldxhardware.h
+ * @brief LLDXHardware definition
+ *
+ * Copyright (c) 2001-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#ifndef LL_LLDXHARDWARE_H
+#define LL_LLDXHARDWARE_H
+
+#include <map>
+
+#include "stdtypes.h"
+#include "llstring.h"
+
+class LLVersion
+{
+public:
+        LLVersion();
+        BOOL set(const std::string &version_string);
+        S32 getField(const S32 field_num);
+protected:
+        std::string mVersionString;
+        S32 mFields[4];
+        BOOL mValid;
+};
+
+class LLDXDriverFile
+{
+public:
+        LLString dump();
+
+public:
+        std::string mFilepath;
+        std::string mName;
+        std::string mVersionString;
+        LLVersion mVersion;
+        std::string mDateString;
+};
+
+class LLDXDevice
+{
+public:
+        ~LLDXDevice();
+        std::string dump();
+
+        LLDXDriverFile *findDriver(const std::string &driver);
+public:
+        std::string mName;
+        std::string mPCIString;
+        std::string mVendorID;
+        std::string mDeviceID;
+
+        typedef std::map<std::string, LLDXDriverFile *> driver_file_map_t;
+        driver_file_map_t mDriverFiles;
+};
+
+
+class LLDXHardware
+{
+public:
+        LLDXHardware();
+        void setWriteDebugFunc(void (*func)(const char*));
+        void cleanup();
+
+        // Returns TRUE on success.
+        // vram_only TRUE does a "light" probe.
+        BOOL getInfo(BOOL vram_only);
+
+        S32 getVRAM() const { return mVRAM; }
+
+        // Find a particular device that matches the following specs.
+        // Empty strings indicate that you don't care.
+        // You can separate multiple devices with '|' chars to indicate you want
+        // ANY of them to match and return.
+        LLDXDevice *findDevice(const std::string &vendor, const std::string &devices);
+
+        LLString dumpDevices();
+public:
+        typedef std::map<std::string, LLDXDevice *> device_map_t;
+        device_map_t mDevices;
+protected:
+        S32 mVRAM;
+};
+
+extern void (*gWriteDebug)(const char* msg);
+extern LLDXHardware gDXHardware;
+
+#endif // LL_LLDXHARDWARE_H