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diff --git a/indra/llwindow/lldxhardware.h b/indra/llwindow/lldxhardware.h
new file mode 100644
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+++ b/indra/llwindow/lldxhardware.h
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+/** 
+ * @file lldxhardware.h
+ * @brief LLDXHardware definition
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#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