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diff --git a/indra/newview/llfloaterpreferencesgraphicsadvanced.h b/indra/newview/llfloaterpreferencesgraphicsadvanced.h
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+++ b/indra/newview/llfloaterpreferencesgraphicsadvanced.h
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+/** 
+ * @file llfloaterpreferencesgraphicsadvanced.h
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLFLOATERPREFERENCEGRAPHICSADVANCED_H
+#define LLFLOATERPREFERENCEGRAPHICSADVANCED_H
+
+#include "llcontrol.h"
+#include "llfloater.h"
+
+class LLSliderCtrl;
+class LLTextBox;
+
+class LLFloaterPreferenceGraphicsAdvanced : public LLFloater
+{
+public: 
+    LLFloaterPreferenceGraphicsAdvanced(const LLSD& key);
+    ~LLFloaterPreferenceGraphicsAdvanced();
+    /*virtual*/ BOOL postBuild();
+    void onOpen(const LLSD& key);
+    void onClickCloseBtn(bool app_quitting);
+    void disableUnavailableSettings();
+    void refreshEnabledGraphics();
+    void refreshEnabledState();
+    void updateSliderText(LLSliderCtrl* ctrl, LLTextBox* text_box);
+    void updateMaxNonImpostors();
+    void setMaxNonImpostorsText(U32 value, LLTextBox* text_box);
+    void updateMaxComplexity();
+    void updateComplexityText();
+    void refresh();
+    // callback for when client modifies a render option
+    void onRenderOptionEnable();
+    void onAdvancedAtmosphericsEnable();
+    LOG_CLASS(LLFloaterPreferenceGraphicsAdvanced);
+
+protected:	
+    void		onBtnOK(const LLSD& userdata);
+    void		onBtnCancel(const LLSD& userdata);
+
+    boost::signals2::connection	mComplexityChangedSignal;
+};
+
+#endif //LLFLOATERPREFERENCEGRAPHICSADVANCED_H
+