/**
 * @file llviewerwindow.cpp
 * @brief Implementation of the LLViewerWindow class.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, 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
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"
#include "llviewerwindow.h"


// system library includes
#include <stdio.h>
#include <iostream>
#include <fstream>
#include <algorithm>
#include <boost/filesystem.hpp>
#include <boost/lambda/core.hpp>
#include <boost/regex.hpp>

#include "llagent.h"
#include "llagentcamera.h"
#include "llcommandhandler.h"
#include "llcommunicationchannel.h"
#include "llfloaterreg.h"
#include "llhudicon.h"
#include "llmeshrepository.h"
#include "llnotificationhandler.h"
#include "llpanellogin.h"
#include "llsetkeybinddialog.h"
#include "llviewerinput.h"
#include "llviewermenu.h"

#include "llviewquery.h"
#include "llxmltree.h"
#include "llslurl.h"
#include "llrender.h"

#include "stringize.h"

//
// TODO: Many of these includes are unnecessary.  Remove them.
//

// linden library includes
#include "llaudioengine.h"      // mute on minimize
#include "llchatentry.h"
#include "indra_constants.h"
#include "llassetstorage.h"
#include "llerrorcontrol.h"
#include "llfontgl.h"
#include "llmousehandler.h"
#include "llrect.h"
#include "llsky.h"
#include "llstring.h"
#include "llui.h"
#include "lluuid.h"
#include "llview.h"
#include "llxfermanager.h"
#include "message.h"
#include "object_flags.h"
#include "lltimer.h"
#include "llviewermenu.h"
#include "lltooltip.h"
#include "llmediaentry.h"
#include "llurldispatcher.h"
#include "raytrace.h"

// newview includes
#include "llagent.h"
#include "llbox.h"
#include "llchicletbar.h"
#include "llconsole.h"
#include "llviewercontrol.h"
#include "llcylinder.h"
#include "lldebugview.h"
#include "lldir.h"
#include "lldrawable.h"
#include "lldrawpoolalpha.h"
#include "lldrawpoolbump.h"
#include "lldrawpoolwater.h"
#include "llmaniptranslate.h"
#include "llface.h"
#include "llfeaturemanager.h"
#include "llfilepicker.h"
#include "llfirstuse.h"
#include "llfloater.h"
#include "llfloaterbuyland.h"
#include "llfloatercamera.h"
#include "llfloaterland.h"
#include "llfloaterinspect.h"
#include "llfloatermap.h"
#include "llfloaternamedesc.h"
#include "llfloaterpreference.h"
#include "llfloatersnapshot.h"
#include "llfloatertools.h"
#include "llfloaterworldmap.h"
#include "llfocusmgr.h"
#include "llfontfreetype.h"
#include "llgesturemgr.h"
#include "llglheaders.h"
#include "lltooltip.h"
#include "llhudmanager.h"
#include "llhudobject.h"
#include "llhudview.h"
#include "llimage.h"
#include "llimagej2c.h"
#include "llimageworker.h"
#include "llkeyboard.h"
#include "lllineeditor.h"
#include "llmenugl.h"
#include "llmenuoptionpathfindingrebakenavmesh.h"
#include "llmodaldialog.h"
#include "llmorphview.h"
#include "llmoveview.h"
#include "llnavigationbar.h"
#include "llnotificationhandler.h"
#include "llpaneltopinfobar.h"
#include "llpopupview.h"
#include "llpreviewtexture.h"
#include "llprogressview.h"
#include "llresmgr.h"
#include "llselectmgr.h"
#include "llrootview.h"
#include "llrendersphere.h"
#include "llstartup.h"
#include "llstatusbar.h"
#include "llstatview.h"
#include "llsurface.h"
#include "llsurfacepatch.h"
#include "lltexlayer.h"
#include "lltextbox.h"
#include "lltexturecache.h"
#include "lltexturefetch.h"
#include "lltextureview.h"
#include "lltoast.h"
#include "lltool.h"
#include "lltoolbarview.h"
#include "lltoolcomp.h"
#include "lltooldraganddrop.h"
#include "lltoolface.h"
#include "lltoolfocus.h"
#include "lltoolgrab.h"
#include "lltoolmgr.h"
#include "lltoolmorph.h"
#include "lltoolpie.h"
#include "lltoolselectland.h"
#include "lltrans.h"
#include "lluictrlfactory.h"
#include "llurldispatcher.h"        // SLURL from other app instance
#include "llversioninfo.h"
#include "llvieweraudio.h"
#include "llviewercamera.h"
#include "llviewergesture.h"
#include "llviewertexturelist.h"
#include "llviewerinventory.h"
#include "llviewerinput.h"
#include "llviewermedia.h"
#include "llviewermediafocus.h"
#include "llviewermenu.h"
#include "llviewermessage.h"
#include "llviewerobjectlist.h"
#include "llviewerparcelmgr.h"
#include "llviewerregion.h"
#include "llviewershadermgr.h"
#include "llviewerstats.h"
#include "llvoavatarself.h"
#include "llvopartgroup.h"
#include "llvovolume.h"
#include "llworld.h"
#include "llworldmapview.h"
#include "pipeline.h"
#include "llappviewer.h"
#include "llviewerdisplay.h"
#include "llspatialpartition.h"
#include "llviewerjoystick.h"
#include "llviewermenufile.h" // LLFilePickerReplyThread
#include "llviewernetwork.h"
#include "llpostprocess.h"
#include "llfloaterimnearbychat.h"
#include "llagentui.h"
#include "llwearablelist.h"

#include "llviewereventrecorder.h"

#include "llnotifications.h"
#include "llnotificationsutil.h"
#include "llnotificationmanager.h"

#include "llfloaternotificationsconsole.h"

#include "llwindowlistener.h"
#include "llviewerwindowlistener.h"
#include "llpaneltopinfobar.h"
#include "llcleanup.h"

#if LL_WINDOWS
#include <tchar.h> // For Unicode conversion methods
#include "llwindowwin32.h" // For AltGr handling
#endif

//
// Globals
//
void render_ui(F32 zoom_factor = 1.f, int subfield = 0);
void swap();

extern bool gDebugClicks;
extern bool gDisplaySwapBuffers;
extern bool gDepthDirty;
extern bool gResizeScreenTexture;
extern bool gCubeSnapshot;
extern bool gSnapshotNoPost;

LLViewerWindow  *gViewerWindow = NULL;

LLFrameTimer    gAwayTimer;
LLFrameTimer    gAwayTriggerTimer;

bool            gShowOverlayTitle = false;

LLViewerObject*  gDebugRaycastObject = NULL;
LLVOPartGroup* gDebugRaycastParticle = NULL;
LLVector4a       gDebugRaycastIntersection;
LLVector4a      gDebugRaycastParticleIntersection;
LLVector2        gDebugRaycastTexCoord;
LLVector4a       gDebugRaycastNormal;
LLVector4a       gDebugRaycastTangent;
S32             gDebugRaycastFaceHit;
S32             gDebugRaycastGLTFNodeHit;
S32             gDebugRaycastGLTFPrimitiveHit;
LLVector4a       gDebugRaycastStart;
LLVector4a       gDebugRaycastEnd;

// HUD display lines in lower right
bool                gDisplayWindInfo = false;
bool                gDisplayCameraPos = false;
bool                gDisplayFOV = false;
bool                gDisplayBadge = false;

static const U8 NO_FACE = 255;
bool gQuietSnapshot = false;

// Minimum value for UIScaleFactor, also defined in preferences, ui_scale_slider
static const F32 MIN_UI_SCALE = 0.75f;
// 4.0 in preferences, but win10 supports larger scaling and value is used more as
// sanity check, so leaving space for larger values from DPI updates.
static const F32 MAX_UI_SCALE = 7.0f;
static const F32 MIN_DISPLAY_SCALE = 0.75f;

static const char KEY_MOUSELOOK = 'M';

static LLCachedControl<std::string> sSnapshotBaseName(LLCachedControl<std::string>(gSavedPerAccountSettings, "SnapshotBaseName", "Snapshot"));
static LLCachedControl<std::string> sSnapshotDir(LLCachedControl<std::string>(gSavedPerAccountSettings, "SnapshotBaseDir", ""));

LLTrace::SampleStatHandle<> LLViewerWindow::sMouseVelocityStat("Mouse Velocity");


class RecordToChatConsoleRecorder : public LLError::Recorder
{
public:
    virtual void recordMessage(LLError::ELevel level,
                                const std::string& message)
    {
        //FIXME: this is NOT thread safe, and will do bad things when a warning is issued from a non-UI thread

        // only log warnings to chat console
        //if (level == LLError::LEVEL_WARN)
        //{
            //LLFloaterChat* chat_floater = LLFloaterReg::findTypedInstance<LLFloaterChat>("chat");
            //if (chat_floater && gSavedSettings.getBOOL("WarningsAsChat"))
            //{
            //  LLChat chat;
            //  chat.mText = message;
            //  chat.mSourceType = CHAT_SOURCE_SYSTEM;

            //  chat_floater->addChat(chat, false, false);
            //}
        //}
    }
};

class RecordToChatConsole : public LLSingleton<RecordToChatConsole>
{
    LLSINGLETON(RecordToChatConsole);
public:
    void startRecorder() { LLError::addRecorder(mRecorder); }
    void stopRecorder() { LLError::removeRecorder(mRecorder); }

private:
    LLError::RecorderPtr mRecorder;
};

RecordToChatConsole::RecordToChatConsole():
    mRecorder(new RecordToChatConsoleRecorder())
{
    mRecorder->showTags(false);
    mRecorder->showLocation(false);
    mRecorder->showMultiline(true);
}

////////////////////////////////////////////////////////////////////////////
//
// Print Utility
//

// Convert a normalized float (-1.0 <= x <= +1.0) to a fixed 1.4 format string:
//
//    s#.####
//
// Where:
//    s  sign character; space if x is positiv, minus if negative
//    #  decimal digits
//
// This is similar to printf("%+.4f") except positive numbers are NOT cluttered with a leading '+' sign.
// NOTE: This does NOT null terminate the output
void normalized_float_to_string(const float x, char *out_str)
{
    static const unsigned char DECIMAL_BCD2[] =
    {
        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
        0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29,
        0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
        0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
        0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
        0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
        0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
        0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
        0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99
    };

    int neg = (x < 0);
    int rem = neg
            ? (int)(x * -10000.)
            : (int)(x *  10000.);

    int d10 = rem % 100; rem /= 100;
    int d32 = rem % 100; rem /= 100;

    out_str[6] = '0' + ((DECIMAL_BCD2[ d10 ] >> 0) & 0xF);
    out_str[5] = '0' + ((DECIMAL_BCD2[ d10 ] >> 4) & 0xF);
    out_str[4] = '0' + ((DECIMAL_BCD2[ d32 ] >> 0) & 0xF);
    out_str[3] = '0' + ((DECIMAL_BCD2[ d32 ] >> 4) & 0xF);
    out_str[2] = '.';
    out_str[1] = '0' + (rem & 1);
    out_str[0] = " -"[neg]; // Could always show '+' for positive but this clutters up the common case
}

// normalized float
//    printf("%-.4f    %-.4f    %-.4f")
// Params:
//   float  &matrix_row[4]
//   int    matrix_cell_index
//   string out_buffer (size 32)
// Note: The buffer is assumed to be pre-filled with spaces
#define MATRIX_ROW_N32_TO_STR(matrix_row, i, out_buffer)          \
    normalized_float_to_string(matrix_row[i+0], out_buffer +  0); \
    normalized_float_to_string(matrix_row[i+1], out_buffer + 11); \
    normalized_float_to_string(matrix_row[i+2], out_buffer + 22); \
    out_buffer[31] = 0;


// regular float
//    sprintf(buffer, "%-8.2f  %-8.2f  %-8.2f", matrix_row[i+0], matrix_row[i+1], matrix_row[i+2]);
// Params:
//   float  &matrix_row[4]
//   int    matrix_cell_index
//   char   out_buffer[32]
// Note: The buffer is assumed to be pre-filled with spaces
#define MATRIX_ROW_F32_TO_STR(matrix_row, i, out_buffer) {                       \
    static const char *format[3] = {                                             \
        "%-8.2f"  ,  /* 0 */                                                     \
        ">  99K  ",  /* 1 */                                                     \
        "< -99K  "   /* 2 */                                                     \
    };                                                                           \
                                                                                 \
    F32 temp_0 = matrix_row[i+0];                                                \
    F32 temp_1 = matrix_row[i+1];                                                \
    F32 temp_2 = matrix_row[i+2];                                                \
                                                                                 \
    U8 flag_0 = (((U8)(temp_0 < -99999.99)) << 1) | ((U8)(temp_0 > 99999.99));   \
    U8 flag_1 = (((U8)(temp_1 < -99999.99)) << 1) | ((U8)(temp_1 > 99999.99));   \
    U8 flag_2 = (((U8)(temp_2 < -99999.99)) << 1) | ((U8)(temp_2 > 99999.99));   \
                                                                                 \
    if (temp_0 < 0.f) out_buffer[ 0] = '-';                                      \
    if (temp_1 < 0.f) out_buffer[11] = '-';                                      \
    if (temp_2 < 0.f) out_buffer[22] = '-';                                      \
                                                                                 \
    sprintf(out_buffer+ 1,format[flag_0],fabsf(temp_0)); out_buffer[ 1+8] = ' '; \
    sprintf(out_buffer+12,format[flag_1],fabsf(temp_1)); out_buffer[12+8] = ' '; \
    sprintf(out_buffer+23,format[flag_2],fabsf(temp_2)); out_buffer[23+8] =  0 ; \
}

////////////////////////////////////////////////////////////////////////////
//
// LLDebugText
//

static LLTrace::BlockTimerStatHandle FTM_DISPLAY_DEBUG_TEXT("Display Debug Text");

class LLDebugText
{
private:
    struct Line
    {
        Line(const std::string& in_text, S32 in_x, S32 in_y) : text(in_text), x(in_x), y(in_y) {}
        std::string text;
        S32 x,y;
    };

    LLViewerWindow *mWindow;

    typedef std::vector<Line> line_list_t;
    line_list_t mLineList;
    LLColor4 mTextColor;

    LLColor4 mBackColor;
    LLRect mBackRectCamera1;
    LLRect mBackRectCamera2;

    void addText(S32 x, S32 y, const std::string &text)
    {
        mLineList.push_back(Line(text, x, y));
    }

    void clearText() { mLineList.clear(); }

public:
    LLDebugText(LLViewerWindow* window) : mWindow(window) {}

    void update()
    {
        if (!gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
        {
            clearText();
            return;
        }

        static LLCachedControl<bool> log_texture_traffic(gSavedSettings,"LogTextureNetworkTraffic", false) ;

        std::string wind_vel_text;
        std::string wind_vector_text;
        std::string rwind_vel_text;
        std::string rwind_vector_text;
        std::string audio_text;

        static const std::string beacon_particle = LLTrans::getString("BeaconParticle");
        static const std::string beacon_physical = LLTrans::getString("BeaconPhysical");
        static const std::string beacon_scripted = LLTrans::getString("BeaconScripted");
        static const std::string beacon_scripted_touch = LLTrans::getString("BeaconScriptedTouch");
        static const std::string beacon_sound = LLTrans::getString("BeaconSound");
        static const std::string beacon_media = LLTrans::getString("BeaconMedia");
        static const std::string beacon_sun = LLTrans::getString("BeaconSun");
        static const std::string beacon_moon = LLTrans::getString("BeaconMoon");
        static const std::string particle_hiding = LLTrans::getString("ParticleHiding");

        // Draw the statistics in a light gray
        // and in a thin font
        mTextColor = LLColor4( 0.86f, 0.86f, 0.86f, 1.f );

        // Draw stuff growing up from right lower corner of screen
        S32 x_right = mWindow->getWorldViewWidthScaled();
        S32 xpos = x_right - 400;
        xpos = llmax(xpos, 0);
        S32 ypos = 64;
        const S32 y_inc = 20;

        // Camera matrix text is hard to see again a white background
        // Add a dark background underneath the matrices for readability (contrast)
        mBackRectCamera1.mLeft   = xpos;
        mBackRectCamera1.mRight  = x_right;
        mBackRectCamera1.mTop    = -1;
        mBackRectCamera1.mBottom = -1;
        mBackRectCamera2 = mBackRectCamera1;

        mBackColor = LLUIColorTable::instance().getColor( "MenuDefaultBgColor" );

        clearText();

        if (gSavedSettings.getBOOL("DebugShowTime"))
        {
            F32 time = gFrameTimeSeconds;
            S32 hours = (S32)(time / (60*60));
            S32 mins = (S32)((time - hours*(60*60)) / 60);
            S32 secs = (S32)((time - hours*(60*60) - mins*60));
            addText(xpos, ypos, llformat("Time: %d:%02d:%02d", hours,mins,secs)); ypos += y_inc;
        }

        if (gSavedSettings.getBOOL("DebugShowMemory"))
        {
            addText(xpos, ypos,
                    STRINGIZE("Memory: " << (LLMemory::getCurrentRSS() / 1024) << " (KB)"));
            ypos += y_inc;
        }

        if (gDisplayCameraPos)
        {
            std::string camera_view_text;
            std::string camera_center_text;
            std::string agent_view_text;
            std::string agent_left_text;
            std::string agent_center_text;
            std::string agent_root_center_text;

            LLVector3d tvector; // Temporary vector to hold data for printing.

            // Update camera center, camera view, wind info every other frame
            tvector = gAgent.getPositionGlobal();
            agent_center_text = llformat("AgentCenter  %f %f %f",
                                         (F32)(tvector.mdV[VX]), (F32)(tvector.mdV[VY]), (F32)(tvector.mdV[VZ]));

            if (isAgentAvatarValid())
            {
                tvector = gAgent.getPosGlobalFromAgent(gAgentAvatarp->mRoot->getWorldPosition());
                agent_root_center_text = llformat("AgentRootCenter %f %f %f",
                                                  (F32)(tvector.mdV[VX]), (F32)(tvector.mdV[VY]), (F32)(tvector.mdV[VZ]));
            }
            else
            {
                agent_root_center_text = "---";
            }


            tvector = LLVector4(gAgent.getFrameAgent().getAtAxis());
            agent_view_text = llformat("AgentAtAxis  %f %f %f",
                                       (F32)(tvector.mdV[VX]), (F32)(tvector.mdV[VY]), (F32)(tvector.mdV[VZ]));

            tvector = LLVector4(gAgent.getFrameAgent().getLeftAxis());
            agent_left_text = llformat("AgentLeftAxis  %f %f %f",
                                       (F32)(tvector.mdV[VX]), (F32)(tvector.mdV[VY]), (F32)(tvector.mdV[VZ]));

            tvector = gAgentCamera.getCameraPositionGlobal();
            camera_center_text = llformat("CameraCenter %f %f %f",
                                          (F32)(tvector.mdV[VX]), (F32)(tvector.mdV[VY]), (F32)(tvector.mdV[VZ]));

            tvector = LLVector4(LLViewerCamera::getInstance()->getAtAxis());
            camera_view_text = llformat("CameraAtAxis    %f %f %f",
                                        (F32)(tvector.mdV[VX]), (F32)(tvector.mdV[VY]), (F32)(tvector.mdV[VZ]));

            addText(xpos, ypos, agent_center_text);  ypos += y_inc;
            addText(xpos, ypos, agent_root_center_text);  ypos += y_inc;
            addText(xpos, ypos, agent_view_text);  ypos += y_inc;
            addText(xpos, ypos, agent_left_text);  ypos += y_inc;
            addText(xpos, ypos, camera_center_text);  ypos += y_inc;
            addText(xpos, ypos, camera_view_text);  ypos += y_inc;
        }

        if (gDisplayWindInfo)
        {
            wind_vel_text = llformat("Wind velocity %.2f m/s", gWindVec.magVec());
            wind_vector_text = llformat("Wind vector   %.2f %.2f %.2f", gWindVec.mV[0], gWindVec.mV[1], gWindVec.mV[2]);
            rwind_vel_text = llformat("RWind vel %.2f m/s", gRelativeWindVec.magVec());
            rwind_vector_text = llformat("RWind vec   %.2f %.2f %.2f", gRelativeWindVec.mV[0], gRelativeWindVec.mV[1], gRelativeWindVec.mV[2]);

            addText(xpos, ypos, wind_vel_text);  ypos += y_inc;
            addText(xpos, ypos, wind_vector_text);  ypos += y_inc;
            addText(xpos, ypos, rwind_vel_text);  ypos += y_inc;
            addText(xpos, ypos, rwind_vector_text);  ypos += y_inc;
        }
        if (gDisplayWindInfo)
        {
            audio_text = llformat("Audio for wind: %d", gAudiop ? gAudiop->isWindEnabled() : -1);
            addText(xpos, ypos, audio_text);  ypos += y_inc;
        }
        if (gDisplayFOV)
        {
            addText(xpos, ypos, llformat("FOV: %2.1f deg", RAD_TO_DEG * LLViewerCamera::getInstance()->getView()));
            ypos += y_inc;
        }
        if (gDisplayBadge)
        {
            addText(xpos, ypos+(y_inc/2), llformat("Hippos!", RAD_TO_DEG * LLViewerCamera::getInstance()->getView()));
            ypos += y_inc * 2;
        }

        /*if (LLViewerJoystick::getInstance()->getOverrideCamera())
        {
            addText(xpos + 200, ypos, llformat("Flycam"));
            ypos += y_inc;
        }*/

        if (gSavedSettings.getBOOL("DebugShowRenderInfo"))
        {
            LLTrace::Recording& last_frame_recording = LLTrace::get_frame_recording().getLastRecording();

            //show streaming cost/triangle count of known prims in current region OR selection
            {
                F32 cost = 0.f;
                S32 count = 0;
                S32 vcount = 0;
                S32 object_count = 0;
                S32 total_bytes = 0;
                S32 visible_bytes = 0;

                const char* label = "Region";
                if (LLSelectMgr::getInstance()->getSelection()->getObjectCount() == 0)
                { //region
                    LLViewerRegion* region = gAgent.getRegion();
                    if (region)
                    {
                        for (S32 i = 0; i < gObjectList.getNumObjects(); ++i)
                        {
                            LLViewerObject* object = gObjectList.getObject(i);
                            if (object &&
                                object->getRegion() == region &&
                                object->getVolume())
                            {
                                object_count++;
                                S32 bytes = 0;
                                S32 visible = 0;
                                cost += object->getStreamingCost();
                                LLMeshCostData costs;
                                if (object->getCostData(costs))
                                {
                                    bytes = costs.getSizeTotal();
                                    visible = costs.getSizeByLOD(object->getLOD());
                                }

                                S32 vt = 0;
                                count += object->getTriangleCount(&vt);
                                vcount += vt;
                                total_bytes += bytes;
                                visible_bytes += visible;
                            }
                        }
                    }
                }
                else
                {
                    label = "Selection";
                    cost = LLSelectMgr::getInstance()->getSelection()->getSelectedObjectStreamingCost(&total_bytes, &visible_bytes);
                    count = LLSelectMgr::getInstance()->getSelection()->getSelectedObjectTriangleCount(&vcount);
                    object_count = LLSelectMgr::getInstance()->getSelection()->getObjectCount();
                }

                addText(xpos,ypos, llformat("%s streaming cost: %.1f", label, cost));
                ypos += y_inc;

                addText(xpos, ypos, llformat("    %.3f KTris, %.3f KVerts, %.1f/%.1f KB, %d objects",
                                        count/1000.f, vcount/1000.f, visible_bytes/1024.f, total_bytes/1024.f, object_count));
                ypos += y_inc;

            }

            addText(xpos, ypos, llformat("%d Texture Binds", LLImageGL::sBindCount));
            ypos += y_inc;

            addText(xpos, ypos, llformat("%d Unique Textures", LLImageGL::sUniqueCount));
            ypos += y_inc;

            addText(xpos, ypos, llformat("%d Render Calls", (U32)last_frame_recording.getSampleCount(LLPipeline::sStatBatchSize)));
            ypos += y_inc;

            addText(xpos, ypos, llformat("%d/%d Objects Active", gObjectList.getNumActiveObjects(), gObjectList.getNumObjects()));
            ypos += y_inc;

            addText(xpos, ypos, llformat("%d Matrix Ops", gPipeline.mMatrixOpCount));
            ypos += y_inc;

            addText(xpos, ypos, llformat("%d Texture Matrix Ops", gPipeline.mTextureMatrixOps));
            ypos += y_inc;

            gPipeline.mTextureMatrixOps = 0;
            gPipeline.mMatrixOpCount = 0;

            if (last_frame_recording.getSampleCount(LLPipeline::sStatBatchSize) > 0)
            {
                addText(xpos, ypos, llformat("Batch min/max/mean: %d/%d/%d", (U32)last_frame_recording.getMin(LLPipeline::sStatBatchSize), (U32)last_frame_recording.getMax(LLPipeline::sStatBatchSize), (U32)last_frame_recording.getMean(LLPipeline::sStatBatchSize)));
            }
            ypos += y_inc;

            addText(xpos, ypos, llformat("UI Verts/Calls: %d/%d", LLRender::sUIVerts, LLRender::sUICalls));
            LLRender::sUICalls = LLRender::sUIVerts = 0;
            ypos += y_inc;

            addText(xpos,ypos, llformat("%d/%d Nodes visible", gPipeline.mNumVisibleNodes, LLSpatialGroup::sNodeCount));

            ypos += y_inc;

            if (!LLOcclusionCullingGroup::sPendingQueries.empty())
            {
                addText(xpos,ypos, llformat("%d Queries pending", LLOcclusionCullingGroup::sPendingQueries.size()));
                ypos += y_inc;
            }


            addText(xpos,ypos, llformat("%d Avatars visible", LLVOAvatar::sNumVisibleAvatars));

            ypos += y_inc;

            addText(xpos,ypos, llformat("%d Lights visible", LLPipeline::sVisibleLightCount));

            ypos += y_inc;

            if (gMeshRepo.meshRezEnabled())
            {
                addText(xpos, ypos, llformat("%.3f MB Mesh Data Received", LLMeshRepository::sBytesReceived/(1024.f*1024.f)));

                ypos += y_inc;

                addText(xpos, ypos, llformat("%d/%d Mesh HTTP Requests/Retries", LLMeshRepository::sHTTPRequestCount,
                    LLMeshRepository::sHTTPRetryCount));
                ypos += y_inc;

                addText(xpos, ypos, llformat("%d/%d Mesh LOD Pending/Processing", LLMeshRepository::sLODPending, LLMeshRepository::sLODProcessing));
                ypos += y_inc;

                addText(xpos, ypos, llformat("%.3f/%.3f MB Mesh Cache Read/Write ", LLMeshRepository::sCacheBytesRead/(1024.f*1024.f), LLMeshRepository::sCacheBytesWritten/(1024.f*1024.f)));
                ypos += y_inc;

                addText(xpos, ypos, llformat("%.3f/%.3f MB Mesh Skins/Decompositions Memory", LLMeshRepository::sCacheBytesSkins / (1024.f*1024.f), LLMeshRepository::sCacheBytesDecomps / (1024.f*1024.f)));
                ypos += y_inc;

                addText(xpos, ypos, llformat("%.3f MB Mesh Headers Memory", LLMeshRepository::sCacheBytesHeaders / (1024.f*1024.f)));

                ypos += y_inc;
            }

            gPipeline.mNumVisibleNodes = LLPipeline::sVisibleLightCount = 0;
        }
        if (gSavedSettings.getBOOL("DebugShowAvatarRenderInfo"))
        {
            std::map<std::string, LLVOAvatar*> sorted_avs;
            {
                for (LLCharacter* character : LLCharacter::sInstances)
                {
                    LLVOAvatar* avatar = (LLVOAvatar*)character;
                    if (!avatar->isDead()) // Not dead yet
                    {
                        // Stuff into a sorted map so the display is ordered
                        sorted_avs[avatar->getFullname()] = avatar;
                    }
                }
            }

            std::string trunc_name;
            std::map<std::string, LLVOAvatar*>::reverse_iterator av_iter = sorted_avs.rbegin();     // Put "A" at the top
            while (av_iter != sorted_avs.rend())
            {
                LLVOAvatar* avatar = av_iter->second;

                avatar->calculateUpdateRenderComplexity(); // Make sure the numbers are up-to-date

                trunc_name = utf8str_truncate(avatar->getFullname(), 16);
                addText(xpos, ypos, llformat("%s : %s, complexity %d, area %.2f",
                    trunc_name.c_str(),
                    LLVOAvatar::rezStatusToString(avatar->getRezzedStatus()).c_str(),
                    avatar->getVisualComplexity(),
                    avatar->getAttachmentSurfaceArea()));
                ypos += y_inc;
                av_iter++;
            }
        }
        if (gSavedSettings.getBOOL("DebugShowRenderMatrices"))
        {
            char camera_lines[8][32];
            memset(camera_lines, ' ', sizeof(camera_lines));

            // Projection last column is always <0,0,-1.0001,0>
            // Projection last row is always <0,0,-0.2>
            mBackRectCamera1.mBottom = ypos - y_inc + 2;
            MATRIX_ROW_N32_TO_STR(gGLProjection, 12,camera_lines[7]); addText(xpos, ypos, std::string(camera_lines[7])); ypos += y_inc;
            MATRIX_ROW_N32_TO_STR(gGLProjection,  8,camera_lines[6]); addText(xpos, ypos, std::string(camera_lines[6])); ypos += y_inc;
            MATRIX_ROW_N32_TO_STR(gGLProjection,  4,camera_lines[5]); addText(xpos, ypos, std::string(camera_lines[5])); ypos += y_inc; mBackRectCamera1.mTop    = ypos + 2;
            MATRIX_ROW_N32_TO_STR(gGLProjection,  0,camera_lines[4]); addText(xpos, ypos, std::string(camera_lines[4])); ypos += y_inc; mBackRectCamera2.mBottom = ypos + 2;

            addText(xpos, ypos, "Projection Matrix");
            ypos += y_inc;

            // View last column is always <0,0,0,1>
            MATRIX_ROW_F32_TO_STR(gGLModelView, 12,camera_lines[3]); addText(xpos, ypos, std::string(camera_lines[3])); ypos += y_inc;
            MATRIX_ROW_N32_TO_STR(gGLModelView,  8,camera_lines[2]); addText(xpos, ypos, std::string(camera_lines[2])); ypos += y_inc;
            MATRIX_ROW_N32_TO_STR(gGLModelView,  4,camera_lines[1]); addText(xpos, ypos, std::string(camera_lines[1])); ypos += y_inc; mBackRectCamera2.mTop = ypos + 2;
            MATRIX_ROW_N32_TO_STR(gGLModelView,  0,camera_lines[0]); addText(xpos, ypos, std::string(camera_lines[0])); ypos += y_inc;

            addText(xpos, ypos, "View Matrix");
            ypos += y_inc;
        }
        // disable use of glReadPixels which messes up nVidia nSight graphics debugging
        if (gSavedSettings.getBOOL("DebugShowColor") && !LLRender::sNsightDebugSupport)
        {
            U8 color[4];
            LLCoordGL coord = gViewerWindow->getCurrentMouse();

            // Convert x,y to raw pixel coords
            S32 x_raw = (S32)llround(coord.mX * gViewerWindow->getWindowWidthRaw() / (F32) gViewerWindow->getWindowWidthScaled());
            S32 y_raw = (S32)llround(coord.mY * gViewerWindow->getWindowHeightRaw() / (F32) gViewerWindow->getWindowHeightScaled());

            glReadPixels(x_raw, y_raw, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, color);
            addText(xpos, ypos, llformat("Pixel <%1d, %1d> R:%1d G:%1d B:%1d A:%1d", x_raw, y_raw, color[0], color[1], color[2], color[3]));
            ypos += y_inc;
        }

        // only display these messages if we are actually rendering beacons at this moment
        if (LLPipeline::getRenderBeacons() && LLFloaterReg::instanceVisible("beacons"))
        {
            if (LLPipeline::getRenderMOAPBeacons())
            {
                addText(xpos, ypos, "Viewing media beacons (white)");
                ypos += y_inc;
            }

            if (LLPipeline::toggleRenderTypeControlNegated(LLPipeline::RENDER_TYPE_PARTICLES))
            {
                addText(xpos, ypos, particle_hiding);
                ypos += y_inc;
            }

            if (LLPipeline::getRenderParticleBeacons())
            {
                addText(xpos, ypos, "Viewing particle beacons (blue)");
                ypos += y_inc;
            }

            if (LLPipeline::getRenderSoundBeacons())
            {
                addText(xpos, ypos, "Viewing sound beacons (yellow)");
                ypos += y_inc;
            }

            if (LLPipeline::getRenderScriptedBeacons())
            {
                addText(xpos, ypos, beacon_scripted);
                ypos += y_inc;
            }
            else
                if (LLPipeline::getRenderScriptedTouchBeacons())
                {
                    addText(xpos, ypos, beacon_scripted_touch);
                    ypos += y_inc;
                }

            if (LLPipeline::getRenderPhysicalBeacons())
            {
                addText(xpos, ypos, "Viewing physical object beacons (green)");
                ypos += y_inc;
            }
        }

        static LLUICachedControl<bool> show_sun_beacon("sunbeacon", false);
        static LLUICachedControl<bool> show_moon_beacon("moonbeacon", false);

        if (show_sun_beacon)
        {
            addText(xpos, ypos, beacon_sun);
            ypos += y_inc;
        }
        if (show_moon_beacon)
        {
            addText(xpos, ypos, beacon_moon);
            ypos += y_inc;
        }

        if(log_texture_traffic)
        {
            U32 old_y = ypos ;
            for(S32 i = LLViewerTexture::BOOST_NONE; i < LLViewerTexture::MAX_GL_IMAGE_CATEGORY; i++)
            {
                if(gTotalTextureBytesPerBoostLevel[i] > (S32Bytes)0)
                {
                    addText(xpos, ypos, llformat("Boost_Level %d:  %.3f MB", i, F32Megabytes(gTotalTextureBytesPerBoostLevel[i]).value()));
                    ypos += y_inc;
                }
            }
            if(ypos != old_y)
            {
                addText(xpos, ypos, "Network traffic for textures:");
                ypos += y_inc;
            }
        }

        if (gSavedSettings.getBOOL("DebugShowTextureInfo"))
        {
            LLViewerObject* objectp = NULL ;

            LLSelectNode* nodep = LLSelectMgr::instance().getHoverNode();
            if (nodep)
            {
                objectp = nodep->getObject();
            }

            if (objectp && !objectp->isDead())
            {
                S32 num_faces = objectp->mDrawable->getNumFaces() ;
                std::set<LLViewerFetchedTexture*> tex_list;

                for(S32 i = 0 ; i < num_faces; i++)
                {
                    LLFace* facep = objectp->mDrawable->getFace(i) ;
                    if(facep)
                    {
                        LLViewerFetchedTexture* tex = dynamic_cast<LLViewerFetchedTexture*>(facep->getTexture()) ;
                        if(tex)
                        {
                            if(tex_list.find(tex) != tex_list.end())
                            {
                                continue ; //already displayed.
                            }
                            tex_list.insert(tex);

                            std::string uuid_str;
                            tex->getID().toString(uuid_str);
                            uuid_str = uuid_str.substr(0,7);

                            addText(xpos, ypos, llformat("ID: %s v_size: %.3f", uuid_str.c_str(), tex->getMaxVirtualSize()));
                            ypos += y_inc;

                            addText(xpos, ypos, llformat("discard level: %d desired level: %d Missing: %s", tex->getDiscardLevel(),
                                tex->getDesiredDiscardLevel(), tex->isMissingAsset() ? "Y" : "N"));
                            ypos += y_inc;
                        }
                    }
                }
            }
        }
    }

    void draw()
    {
        LL_RECORD_BLOCK_TIME(FTM_DISPLAY_DEBUG_TEXT);

        // Camera matrix text is hard to see again a white background
        // Add a dark background underneath the matrices for readability (contrast)
        if (mBackRectCamera1.mTop >= 0)
        {
            mBackColor.setAlpha( 0.75f );
            gl_rect_2d(mBackRectCamera1, mBackColor, true);

            mBackColor.setAlpha( 0.66f );
            gl_rect_2d(mBackRectCamera2, mBackColor, true);
        }

        for (line_list_t::iterator iter = mLineList.begin();
             iter != mLineList.end(); ++iter)
        {
            const Line& line = *iter;
            LLFontGL::getFontMonospace()->renderUTF8(line.text, 0, (F32)line.x, (F32)line.y, mTextColor,
                    LLFontGL::LEFT, LLFontGL::TOP, LLFontGL::NORMAL, LLFontGL::NO_SHADOW);
        }
    }

};

void LLViewerWindow::updateDebugText()
{
    mDebugText->update();
}

////////////////////////////////////////////////////////////////////////////
//
// LLViewerWindow
//

LLViewerWindow::Params::Params()
:   title("title"),
    name("name"),
    x("x"),
    y("y"),
    width("width"),
    height("height"),
    min_width("min_width"),
    min_height("min_height"),
    fullscreen("fullscreen", false),
    ignore_pixel_depth("ignore_pixel_depth", false)
{}


void LLViewerWindow::handlePieMenu(S32 x, S32 y, MASK mask)
{
    if (CAMERA_MODE_CUSTOMIZE_AVATAR != gAgentCamera.getCameraMode() && LLToolMgr::getInstance()->getCurrentTool() != LLToolPie::getInstance() && gAgent.isInitialized())
    {
        // If the current tool didn't process the click, we should show
        // the pie menu.  This can be done by passing the event to the pie
        // menu tool.
        LLToolPie::getInstance()->handleRightMouseDown(x, y, mask);
    }
}

bool LLViewerWindow::handleAnyMouseClick(LLWindow *window, LLCoordGL pos, MASK mask, EMouseClickType clicktype, bool down, bool& is_toolmgr_action)
{
    const char* buttonname = "";
    const char* buttonstatestr = "";
    S32 x = pos.mX;
    S32 y = pos.mY;
    x = ll_round((F32)x / mDisplayScale.mV[VX]);
    y = ll_round((F32)y / mDisplayScale.mV[VY]);

    // Handle non-consuming global keybindings, like voice
    gViewerInput.handleGlobalBindsMouse(clicktype, mask, down);

    // only send mouse clicks to UI if UI is visible
    if(gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
    {

        if (down)
        {
            buttonstatestr = "down" ;
        }
        else
        {
            buttonstatestr = "up" ;
        }

        switch (clicktype)
        {
        case CLICK_LEFT:
            mLeftMouseDown = down;
            buttonname = "Left";
            break;
        case CLICK_RIGHT:
            mRightMouseDown = down;
            buttonname = "Right";
            break;
        case CLICK_MIDDLE:
            mMiddleMouseDown = down;
            buttonname = "Middle";
            break;
        case CLICK_DOUBLELEFT:
            mLeftMouseDown = down;
            buttonname = "Left Double Click";
            break;
        case CLICK_BUTTON4:
            buttonname = "Button 4";
            break;
        case CLICK_BUTTON5:
            buttonname = "Button 5";
            break;
        default:
            break; // COUNT and NONE
        }

        LLView::sMouseHandlerMessage.clear();

        if (gMenuBarView)
        {
            // stop ALT-key access to menu
            gMenuBarView->resetMenuTrigger();
        }

        if (gDebugClicks)
        {
            LL_INFOS() << "ViewerWindow " << buttonname << " mouse " << buttonstatestr << " at " << x << "," << y << LL_ENDL;
        }

        // Make sure we get a corresponding mouseup event, even if the mouse leaves the window
        if (down)
            mWindow->captureMouse();
        else
            mWindow->releaseMouse();

        // Indicate mouse was active
        LLUI::getInstance()->resetMouseIdleTimer();

        // Don't let the user move the mouse out of the window until mouse up.
        if( LLToolMgr::getInstance()->getCurrentTool()->clipMouseWhenDown() )
        {
            mWindow->setMouseClipping(down);
        }

        LLMouseHandler* mouse_captor = gFocusMgr.getMouseCapture();
        if( mouse_captor )
        {
            S32 local_x;
            S32 local_y;
            mouse_captor->screenPointToLocal( x, y, &local_x, &local_y );
            if (LLView::sDebugMouseHandling)
            {
                LL_INFOS() << buttonname << " Mouse " << buttonstatestr << " handled by captor " << mouse_captor->getName() << LL_ENDL;
            }

            bool r = mouse_captor->handleAnyMouseClick(local_x, local_y, mask, clicktype, down);
            if (r) {

                LL_DEBUGS() << "LLViewerWindow::handleAnyMouseClick viewer with mousecaptor calling updatemouseeventinfo - local_x|global x  "<< local_x << " " << x  << "local/global y " << local_y << " " << y << LL_ENDL;

                LLViewerEventRecorder::instance().setMouseGlobalCoords(x,y);
                LLViewerEventRecorder::instance().logMouseEvent(std::string(buttonstatestr),std::string(buttonname));

            }
            else if (down && clicktype == CLICK_RIGHT)
            {
                handlePieMenu(x, y, mask);
                r = true;
            }
            return r;
        }

        // Mark the click as handled and return if we aren't within the root view to avoid spurious bugs
        if( !mRootView->pointInView(x, y) )
        {
            return true;
        }
        // Give the UI views a chance to process the click

        bool r= mRootView->handleAnyMouseClick(x, y, mask, clicktype, down) ;
        if (r)
        {

            LL_DEBUGS() << "LLViewerWindow::handleAnyMouseClick calling updatemouseeventinfo - global x  "<< " " << x   << "global y " << y  << "buttonstate: " << buttonstatestr << " buttonname " << buttonname << LL_ENDL;

            LLViewerEventRecorder::instance().setMouseGlobalCoords(x,y);

            // Clear local coords - this was a click on root window so these are not needed
            // By not including them, this allows the test skeleton generation tool to be smarter when generating code
            // the code generator can be smarter because when local coords are present it can try the xui path with local coords
            // and fallback to global coordinates only if needed.
            // The drawback to this approach is sometimes a valid xui path will appear to work fine, but NOT interact with the UI element
            // (VITA support not implemented yet or not visible to VITA due to widget further up xui path not being visible to VITA)
            // For this reason it's best to provide hints where possible here by leaving out local coordinates
            LLViewerEventRecorder::instance().setMouseLocalCoords(-1,-1);
            LLViewerEventRecorder::instance().logMouseEvent(buttonstatestr,buttonname);

            if (LLView::sDebugMouseHandling)
            {
                LL_INFOS() << buttonname << " Mouse " << buttonstatestr << " " << LLViewerEventRecorder::instance().get_xui()   << LL_ENDL;
            }
            return true;
        } else if (LLView::sDebugMouseHandling)
            {
                LL_INFOS() << buttonname << " Mouse " << buttonstatestr << " not handled by view" << LL_ENDL;
            }
    }

    // Do not allow tool manager to handle mouseclicks if we have disconnected
    if(!gDisconnected && LLToolMgr::getInstance()->getCurrentTool()->handleAnyMouseClick( x, y, mask, clicktype, down ) )
    {
        LLViewerEventRecorder::instance().clear_xui();
        is_toolmgr_action = true;
        return true;
    }

    if (down && clicktype == CLICK_RIGHT)
    {
        handlePieMenu(x, y, mask);
        return true;
    }

    // If we got this far on a down-click, it wasn't handled.
    // Up-clicks, though, are always handled as far as the OS is concerned.
    bool default_rtn = !down;
    return default_rtn;
}

bool LLViewerWindow::handleMouseDown(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    mAllowMouseDragging = false;
    if (!mMouseDownTimer.getStarted())
    {
        mMouseDownTimer.start();
    }
    else
    {
        mMouseDownTimer.reset();
    }
    bool down = true;
    //handleMouse() loops back to LLViewerWindow::handleAnyMouseClick
    return gViewerInput.handleMouse(window, pos, mask, CLICK_LEFT, down);
}

bool LLViewerWindow::handleDoubleClick(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    // try handling as a double-click first, then a single-click if that
    // wasn't handled.
    bool down = true;
    if (gViewerInput.handleMouse(window, pos, mask, CLICK_DOUBLELEFT, down))
    {
        return true;
    }
    return handleMouseDown(window, pos, mask);
}

bool LLViewerWindow::handleMouseUp(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    if (mMouseDownTimer.getStarted())
    {
        mMouseDownTimer.stop();
    }
    bool down = false;
    return gViewerInput.handleMouse(window, pos, mask, CLICK_LEFT, down);
}
bool LLViewerWindow::handleRightMouseDown(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    bool down = true;
    return gViewerInput.handleMouse(window, pos, mask, CLICK_RIGHT, down);
}

bool LLViewerWindow::handleRightMouseUp(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    bool down = false;
    return gViewerInput.handleMouse(window, pos, mask, CLICK_RIGHT, down);
}

bool LLViewerWindow::handleMiddleMouseDown(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    bool down = true;
    gViewerInput.handleMouse(window, pos, mask, CLICK_MIDDLE, down);

    // Always handled as far as the OS is concerned.
    return true;
}

LLWindowCallbacks::DragNDropResult LLViewerWindow::handleDragNDrop( LLWindow *window, LLCoordGL pos, MASK mask, LLWindowCallbacks::DragNDropAction action, std::string data)
{
    LLWindowCallbacks::DragNDropResult result = LLWindowCallbacks::DND_NONE;

    const bool prim_media_dnd_enabled = gSavedSettings.getBOOL("PrimMediaDragNDrop");
    const bool slurl_dnd_enabled = gSavedSettings.getBOOL("SLURLDragNDrop");

    if ( prim_media_dnd_enabled || slurl_dnd_enabled )
    {
        switch(action)
        {
            // Much of the handling for these two cases is the same.
            case LLWindowCallbacks::DNDA_TRACK:
            case LLWindowCallbacks::DNDA_DROPPED:
            case LLWindowCallbacks::DNDA_START_TRACKING:
            {
                bool drop = (LLWindowCallbacks::DNDA_DROPPED == action);

                if (slurl_dnd_enabled)
                {
                    LLSLURL dropped_slurl(data);
                    if(dropped_slurl.isSpatial())
                    {
                        if (drop)
                        {
                            LLURLDispatcher::dispatch( dropped_slurl.getSLURLString(), LLCommandHandler::NAV_TYPE_CLICKED, NULL, true );
                            return LLWindowCallbacks::DND_MOVE;
                        }
                        return LLWindowCallbacks::DND_COPY;
                    }
                }

                if (prim_media_dnd_enabled)
                {
                    LLPickInfo pick_info = pickImmediate( pos.mX, pos.mY,
                                                          true /* pick_transparent */,
                                                          false /* pick_rigged */);

                    S32 object_face = pick_info.mObjectFace;
                    std::string url = data;

                    LL_DEBUGS() << "Object: picked at " << pos.mX << ", " << pos.mY << " - face = " << object_face << " - URL = " << url << LL_ENDL;

                    LLVOVolume *obj = dynamic_cast<LLVOVolume*>(static_cast<LLViewerObject*>(pick_info.getObject()));

                    if (obj && !obj->getRegion()->getCapability("ObjectMedia").empty())
                    {
                        LLTextureEntry *te = obj->getTE(object_face);

                        // can modify URL if we can modify the object or we have navigate permissions
                        bool allow_modify_url = obj->permModify() || (te && obj->hasMediaPermission( te->getMediaData(), LLVOVolume::MEDIA_PERM_INTERACT ));

                        if (te && allow_modify_url )
                        {
                            if (drop)
                            {
                                // object does NOT have media already
                                if ( ! te->hasMedia() )
                                {
                                    // we are allowed to modify the object
                                    if ( obj->permModify() )
                                    {
                                        // Create new media entry
                                        LLSD media_data;
                                        // XXX Should we really do Home URL too?
                                        media_data[LLMediaEntry::HOME_URL_KEY] = url;
                                        media_data[LLMediaEntry::CURRENT_URL_KEY] = url;
                                        media_data[LLMediaEntry::AUTO_PLAY_KEY] = true;
                                        obj->syncMediaData(object_face, media_data, true, true);
                                        // XXX This shouldn't be necessary, should it ?!?
                                        if (obj->getMediaImpl(object_face))
                                            obj->getMediaImpl(object_face)->navigateReload();
                                        obj->sendMediaDataUpdate();

                                        result = LLWindowCallbacks::DND_COPY;
                                    }
                                }
                                else
                                // object HAS media already
                                {
                                    // URL passes the whitelist
                                    if (te->getMediaData()->checkCandidateUrl( url ) )
                                    {
                                        // just navigate to the URL
                                        if (obj->getMediaImpl(object_face))
                                        {
                                            obj->getMediaImpl(object_face)->navigateTo(url);
                                        }
                                        else
                                        {
                                            // This is very strange.  Navigation should
                                            // happen via the Impl, but we don't have one.
                                            // This sends it to the server, which /should/
                                            // trigger us getting it.  Hopefully.
                                            LLSD media_data;
                                            media_data[LLMediaEntry::CURRENT_URL_KEY] = url;
                                            obj->syncMediaData(object_face, media_data, true, true);
                                            obj->sendMediaDataUpdate();
                                        }
                                        result = LLWindowCallbacks::DND_LINK;

                                    }
                                }
                                LLSelectMgr::getInstance()->unhighlightObjectOnly(mDragHoveredObject);
                                mDragHoveredObject = NULL;

                            }
                            else
                            {
                                // Check the whitelist, if there's media (otherwise just show it)
                                if (te->getMediaData() == NULL || te->getMediaData()->checkCandidateUrl(url))
                                {
                                    if ( obj != mDragHoveredObject)
                                    {
                                        // Highlight the dragged object
                                        LLSelectMgr::getInstance()->unhighlightObjectOnly(mDragHoveredObject);
                                        mDragHoveredObject = obj;
                                        LLSelectMgr::getInstance()->highlightObjectOnly(mDragHoveredObject);
                                    }
                                    result = (! te->hasMedia()) ? LLWindowCallbacks::DND_COPY : LLWindowCallbacks::DND_LINK;

                                }
                            }
                        }
                    }
                }
            }
            break;

            case LLWindowCallbacks::DNDA_STOP_TRACKING:
                // The cleanup case below will make sure things are unhilighted if necessary.
            break;
        }

        if (prim_media_dnd_enabled &&
            result == LLWindowCallbacks::DND_NONE && !mDragHoveredObject.isNull())
        {
            LLSelectMgr::getInstance()->unhighlightObjectOnly(mDragHoveredObject);
            mDragHoveredObject = NULL;
        }
    }

    return result;
}

bool LLViewerWindow::handleMiddleMouseUp(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    bool down = false;
    gViewerInput.handleMouse(window, pos, mask, CLICK_MIDDLE, down);

    // Always handled as far as the OS is concerned.
    return true;
}

bool LLViewerWindow::handleOtherMouse(LLWindow *window, LLCoordGL pos, MASK mask, S32 button, bool down)
{
    switch (button)
    {
    case 4:
        gViewerInput.handleMouse(window, pos, mask, CLICK_BUTTON4, down);
        break;
    case 5:
        gViewerInput.handleMouse(window, pos, mask, CLICK_BUTTON5, down);
        break;
    default:
        break;
    }

    // Always handled as far as the OS is concerned.
    return true;
}

bool LLViewerWindow::handleOtherMouseDown(LLWindow *window, LLCoordGL pos, MASK mask, S32 button)
{
    return handleOtherMouse(window, pos, mask, button, true);
}

bool LLViewerWindow::handleOtherMouseUp(LLWindow *window, LLCoordGL pos, MASK mask, S32 button)
{
    return handleOtherMouse(window, pos, mask, button, false);
}

// WARNING: this is potentially called multiple times per frame
void LLViewerWindow::handleMouseMove(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    S32 x = pos.mX;
    S32 y = pos.mY;

    x = ll_round((F32)x / mDisplayScale.mV[VX]);
    y = ll_round((F32)y / mDisplayScale.mV[VY]);

    mMouseInWindow = true;

    // Save mouse point for access during idle() and display()

    LLCoordGL mouse_point(x, y);

    if (mouse_point != mCurrentMousePoint)
    {
        LLUI::getInstance()->resetMouseIdleTimer();
    }

    saveLastMouse(mouse_point);

    mWindow->showCursorFromMouseMove();

    if (gAwayTimer.getElapsedTimeF32() > LLAgent::MIN_AFK_TIME
        && !gDisconnected)
    {
        gAgent.clearAFK();
    }
}

void LLViewerWindow::handleMouseDragged(LLWindow *window,  LLCoordGL pos, MASK mask)
{
    if (mMouseDownTimer.getStarted())
    {
        if (mMouseDownTimer.getElapsedTimeF32() > 0.1)
        {
            mAllowMouseDragging = true;
            mMouseDownTimer.stop();
        }
    }
    if(mAllowMouseDragging || !LLToolCamera::getInstance()->hasMouseCapture())
    {
        handleMouseMove(window, pos, mask);
    }
}

void LLViewerWindow::handleMouseLeave(LLWindow *window)
{
    // Note: we won't get this if we have captured the mouse.
    llassert( gFocusMgr.getMouseCapture() == NULL );
    mMouseInWindow = false;
    LLToolTipMgr::instance().blockToolTips();
}

bool LLViewerWindow::handleCloseRequest(LLWindow *window)
{
    // User has indicated they want to close, but we may need to ask
    // about modified documents.
    LLAppViewer::instance()->userQuit();
    // Don't quit immediately
    return false;
}

void LLViewerWindow::handleQuit(LLWindow *window)
{
    if (gNonInteractive)
    {
        LLAppViewer::instance()->requestQuit();
    }
    else
    {
        LL_INFOS() << "Window forced quit" << LL_ENDL;
        LLAppViewer::instance()->forceQuit();
    }
}

void LLViewerWindow::handleResize(LLWindow *window,  S32 width,  S32 height)
{
    reshape(width, height);
    mResDirty = true;
}

// The top-level window has gained focus (e.g. via ALT-TAB)
void LLViewerWindow::handleFocus(LLWindow *window)
{
    gFocusMgr.setAppHasFocus(true);
    LLModalDialog::onAppFocusGained();

    gAgent.onAppFocusGained();
    LLToolMgr::getInstance()->onAppFocusGained();

    // See if we're coming in with modifier keys held down
    if (gKeyboard)
    {
        gKeyboard->resetMaskKeys();
    }

    // resume foreground running timer
    // since we artifically limit framerate when not frontmost
    gForegroundTime.unpause();
}

// The top-level window has lost focus (e.g. via ALT-TAB)
void LLViewerWindow::handleFocusLost(LLWindow *window)
{
    gFocusMgr.setAppHasFocus(false);
    //LLModalDialog::onAppFocusLost();
    LLToolMgr::getInstance()->onAppFocusLost();
    gFocusMgr.setMouseCapture( NULL );

    if (gMenuBarView)
    {
        // stop ALT-key access to menu
        gMenuBarView->resetMenuTrigger();
    }

    // restore mouse cursor
    showCursor();
    getWindow()->setMouseClipping(false);

    // If losing focus while keys are down, handle them as
    // an 'up' to correctly release states, then reset states
    if (gKeyboard)
    {
        gKeyboard->resetKeyDownAndHandle();
        gKeyboard->resetKeys();
    }

    // pause timer that tracks total foreground running time
    gForegroundTime.pause();
}


bool LLViewerWindow::handleTranslatedKeyDown(KEY key,  MASK mask, bool repeated)
{
    // Handle non-consuming global keybindings, like voice
    // Never affects event processing.
    gViewerInput.handleGlobalBindsKeyDown(key, mask);

    if (gAwayTimer.getElapsedTimeF32() > LLAgent::MIN_AFK_TIME)
    {
        gAgent.clearAFK();
    }

    // *NOTE: We want to interpret KEY_RETURN later when it arrives as
    // a Unicode char, not as a keydown.  Otherwise when client frame
    // rate is really low, hitting return sends your chat text before
    // it's all entered/processed.
    if (key == KEY_RETURN && mask == MASK_NONE)
    {
        // RIDER: although, at times some of the controlls (in particular the CEF viewer
        // would like to know about the KEYDOWN for an enter key... so ask and pass it along.
        LLFocusableElement* keyboard_focus = gFocusMgr.getKeyboardFocus();
        if (keyboard_focus && !keyboard_focus->wantsReturnKey())
            return false;
    }

    // remaps, handles ignored cases and returns back to viewer window.
    return gViewerInput.handleKey(key, mask, repeated);
}

bool LLViewerWindow::handleTranslatedKeyUp(KEY key,  MASK mask)
{
    // Handle non-consuming global keybindings, like voice
    // Never affects event processing.
    gViewerInput.handleGlobalBindsKeyUp(key, mask);

    // Let the inspect tool code check for ALT key to set LLToolSelectRect active instead LLToolCamera
    LLToolCompInspect * tool_inspectp = LLToolCompInspect::getInstance();
    if (LLToolMgr::getInstance()->getCurrentTool() == tool_inspectp)
    {
        tool_inspectp->keyUp(key, mask);
    }

    return gViewerInput.handleKeyUp(key, mask);
}

void LLViewerWindow::handleScanKey(KEY key, bool key_down, bool key_up, bool key_level)
{
    LLViewerJoystick::getInstance()->setCameraNeedsUpdate(true);
    gViewerInput.scanKey(key, key_down, key_up, key_level);
    return; // Be clear this function returns nothing
}




bool LLViewerWindow::handleActivate(LLWindow *window, bool activated)
{
    if (activated)
    {
        mActive = true;
        send_agent_resume();
        gAgent.clearAFK();

        // Unmute audio
        audio_update_volume();
    }
    else
    {
        mActive = false;

        // if the user has chosen to go Away automatically after some time, then go Away when minimizing
        if (gSavedSettings.getS32("AFKTimeout"))
        {
            gAgent.setAFK();
        }

        // SL-53351: Make sure we're not in mouselook when minimised, to prevent control issues
        if (gAgentCamera.getCameraMode() == CAMERA_MODE_MOUSELOOK)
        {
            gAgentCamera.changeCameraToDefault();
        }

        send_agent_pause();

        // Mute audio
        audio_update_volume();
    }
    return true;
}

bool LLViewerWindow::handleActivateApp(LLWindow *window, bool activating)
{
    //if (!activating) gAgentCamera.changeCameraToDefault();

    LLViewerJoystick::getInstance()->setNeedsReset(true);
    return false;
}


void LLViewerWindow::handleMenuSelect(LLWindow *window,  S32 menu_item)
{
}


bool LLViewerWindow::handlePaint(LLWindow *window,  S32 x,  S32 y, S32 width,  S32 height)
{
    // *TODO: Enable similar information output for other platforms?  DK 2011-02-18
#if LL_WINDOWS
    if (gHeadlessClient)
    {
        HWND window_handle = (HWND)window->getPlatformWindow();
        PAINTSTRUCT ps;
        HDC hdc;

        RECT wnd_rect;
        wnd_rect.left = 0;
        wnd_rect.top = 0;
        wnd_rect.bottom = 200;
        wnd_rect.right = 500;

        hdc = BeginPaint(window_handle, &ps);
        //SetBKColor(hdc, RGB(255, 255, 255));
        FillRect(hdc, &wnd_rect, CreateSolidBrush(RGB(255, 255, 255)));

        std::string temp_str;
        LLTrace::Recording& recording = LLViewerStats::instance().getRecording();
        temp_str = llformat( "FPS %3.1f Phy FPS %2.1f Time Dil %1.3f",      /* Flawfinder: ignore */
                recording.getPerSec(LLStatViewer::FPS), //mFPSStat.getMeanPerSec(),
                recording.getLastValue(LLStatViewer::SIM_PHYSICS_FPS),
                recording.getLastValue(LLStatViewer::SIM_TIME_DILATION));
        int len = static_cast<int>(temp_str.length());
        TextOutA(hdc, 0, 0, temp_str.c_str(), len);


        LLVector3d pos_global = gAgent.getPositionGlobal();
        temp_str = llformat( "Avatar pos %6.1lf %6.1lf %6.1lf", pos_global.mdV[0], pos_global.mdV[1], pos_global.mdV[2]);
        len = static_cast<S32>(temp_str.length());
        TextOutA(hdc, 0, 25, temp_str.c_str(), len);

        TextOutA(hdc, 0, 50, "Set \"HeadlessClient FALSE\" in settings.ini file to reenable", 61);
        EndPaint(window_handle, &ps);
        return true;
    }
#endif
    return false;
}


void LLViewerWindow::handleScrollWheel(LLWindow *window,  S32 clicks)
{
    handleScrollWheel( clicks );
}

void LLViewerWindow::handleScrollHWheel(LLWindow *window,  S32 clicks)
{
    handleScrollHWheel(clicks);
}

void LLViewerWindow::handleWindowBlock(LLWindow *window)
{
    send_agent_pause();
}

void LLViewerWindow::handleWindowUnblock(LLWindow *window)
{
    send_agent_resume();
}

void LLViewerWindow::handleDataCopy(LLWindow *window, S32 data_type, void *data)
{
    const S32 SLURL_MESSAGE_TYPE = 0;
    switch (data_type)
    {
    case SLURL_MESSAGE_TYPE:
        // received URL
        std::string url = (const char*)data;
        LLMediaCtrl* web = NULL;
        const bool trusted_browser = false;
        // don't treat slapps coming from external browsers as "clicks" as this would bypass throttling
        if (LLURLDispatcher::dispatch(url, LLCommandHandler::NAV_TYPE_EXTERNAL, web, trusted_browser))
        {
            // bring window to foreground, as it has just been "launched" from a URL
            mWindow->bringToFront();
        }
        break;
    }
}

bool LLViewerWindow::handleTimerEvent(LLWindow *window)
{
    //TODO: just call this every frame from gatherInput instead of using a convoluted 30fps timer callback
    if (LLViewerJoystick::getInstance()->getOverrideCamera())
    {
        LLViewerJoystick::getInstance()->updateStatus();
        return true;
    }
    return false;
}

bool LLViewerWindow::handleDeviceChange(LLWindow *window)
{
    // give a chance to use a joystick after startup (hot-plugging)
    if (!LLViewerJoystick::getInstance()->isJoystickInitialized() )
    {
        LLViewerJoystick::getInstance()->init(true);
        return true;
    }
    return false;
}

bool LLViewerWindow::handleDPIChanged(LLWindow *window, F32 ui_scale_factor, S32 window_width, S32 window_height)
{
    if (ui_scale_factor >= MIN_UI_SCALE && ui_scale_factor <= MAX_UI_SCALE)
    {
        LLViewerWindow::reshape(window_width, window_height);
        mResDirty = true;
        return true;
    }
    else
    {
        LL_WARNS() << "DPI change caused UI scale to go out of bounds: " << ui_scale_factor << LL_ENDL;
        return false;
    }
}

bool LLViewerWindow::handleWindowDidChangeScreen(LLWindow *window)
{
    LLCoordScreen window_rect;
    mWindow->getSize(&window_rect);
    reshape(window_rect.mX, window_rect.mY);
    return true;
}

void LLViewerWindow::handlePingWatchdog(LLWindow *window, const char * msg)
{
    LLAppViewer::instance()->pingMainloopTimeout(msg);
}


void LLViewerWindow::handleResumeWatchdog(LLWindow *window)
{
    LLAppViewer::instance()->resumeMainloopTimeout();
}

void LLViewerWindow::handlePauseWatchdog(LLWindow *window)
{
    LLAppViewer::instance()->pauseMainloopTimeout();
}

//virtual
std::string LLViewerWindow::translateString(const char* tag)
{
    return LLTrans::getString( std::string(tag) );
}

//virtual
std::string LLViewerWindow::translateString(const char* tag,
        const std::map<std::string, std::string>& args)
{
    // LLTrans uses a special subclass of std::string for format maps,
    // but we must use std::map<> in these callbacks, otherwise we create
    // a dependency between LLWindow and LLFormatMapString.  So copy the data.
    LLStringUtil::format_map_t args_copy;
    std::map<std::string,std::string>::const_iterator it = args.begin();
    for ( ; it != args.end(); ++it)
    {
        args_copy[it->first] = it->second;
    }
    return LLTrans::getString( std::string(tag), args_copy);
}

//
// Classes
//
LLViewerWindow::LLViewerWindow(const Params& p)
:   mWindow(NULL),
    mActive(true),
    mUIVisible(true),
    mWindowRectRaw(0, p.height, p.width, 0),
    mWindowRectScaled(0, p.height, p.width, 0),
    mWorldViewRectRaw(0, p.height, p.width, 0),
    mLeftMouseDown(false),
    mMiddleMouseDown(false),
    mRightMouseDown(false),
    mMouseInWindow( false ),
    mAllowMouseDragging(true),
    mMouseDownTimer(),
    mLastMask( MASK_NONE ),
    mToolStored( NULL ),
    mHideCursorPermanent( false ),
    mCursorHidden(false),
    mResDirty(false),
    mStatesDirty(false),
    mProgressView(NULL)
{
    // gKeyboard is still NULL, so it doesn't do LLWindowListener any good to
    // pass its value right now. Instead, pass it a nullary function that
    // will, when we later need it, return the value of gKeyboard.
    // boost::lambda::var() constructs such a functor on the fly.
    mWindowListener.reset(new LLWindowListener(this, boost::lambda::var(gKeyboard)));
    mViewerWindowListener.reset(new LLViewerWindowListener(this));

    mSystemChannel.reset(new LLNotificationChannel("System", "Visible", LLNotificationFilters::includeEverything));
    mCommunicationChannel.reset(new LLCommunicationChannel("Communication", "Visible"));
    mAlertsChannel.reset(new LLNotificationsUI::LLViewerAlertHandler("VW_alerts", "alert"));
    mModalAlertsChannel.reset(new LLNotificationsUI::LLViewerAlertHandler("VW_alertmodal", "alertmodal"));

    bool ignore = gSavedSettings.getBOOL("IgnoreAllNotifications");
    LLNotifications::instance().setIgnoreAllNotifications(ignore);
    if (ignore)
    {
    LL_INFOS() << "NOTE: ALL NOTIFICATIONS THAT OCCUR WILL GET ADDED TO IGNORE LIST FOR LATER RUNS." << LL_ENDL;
    }


    /*
    LLWindowCallbacks* callbacks,
    const std::string& title, const std::string& name, S32 x, S32 y, S32 width, S32 height, U32 flags,
    bool fullscreen,
    bool clearBg,
    bool disable_vsync,
    bool ignore_pixel_depth,
    U32 fsaa_samples)
    */
    // create window

    U32 max_core_count = gSavedSettings.getU32("EmulateCoreCount");
    F32 max_gl_version = gSavedSettings.getF32("RenderMaxOpenGLVersion");

    mWindow = LLWindowManager::createWindow(this,
        p.title, p.name, p.x, p.y, p.width, p.height, 0,
        p.fullscreen,
        gHeadlessClient,
        gSavedSettings.getBOOL("RenderVSyncEnable"),
        !gHeadlessClient,
        p.ignore_pixel_depth,
        0,
        max_core_count,
        max_gl_version); //don't use window level anti-aliasing

    if (NULL == mWindow)
    {
        LLSplashScreen::update(LLTrans::getString("StartupRequireDriverUpdate"));

        LL_WARNS("Window") << "Failed to create window, to be shutting Down, be sure your graphics driver is updated." << LL_ENDL ;

        ms_sleep(5000) ; //wait for 5 seconds.

        LLSplashScreen::update(LLTrans::getString("ShuttingDown"));
#if LL_LINUX
        LL_WARNS() << "Unable to create window, be sure screen is set at 32-bit color and your graphics driver is configured correctly.  See README-linux.txt for further information."
                << LL_ENDL;
#else
        LL_WARNS("Window") << "Unable to create window, be sure screen is set at 32-bit color in Control Panels->Display->Settings"
                << LL_ENDL;
#endif
        LLAppViewer::instance()->fastQuit(1);
    }
    else if (!LLViewerShaderMgr::sInitialized)
    {
        //immediately initialize shaders
        LLViewerShaderMgr::sInitialized = true;
        LLViewerShaderMgr::instance()->setShaders();
    }

    if (!LLAppViewer::instance()->restoreErrorTrap())
    {
        // this always happens, so downgrading it to INFO
        LL_INFOS("Window") << " Someone took over my signal/exception handler (post createWindow; normal)" << LL_ENDL;
    }

    const bool do_not_enforce = false;
    mWindow->setMinSize(p.min_width, p.min_height, do_not_enforce);  // root view not set
    LLCoordScreen scr;
    mWindow->getSize(&scr);

    // Reset UI scale factor on first run if OS's display scaling is not 100%
    if (gSavedSettings.getBOOL("ResetUIScaleOnFirstRun"))
    {
        if (mWindow->getSystemUISize() != 1.f)
        {
            gSavedSettings.setF32("UIScaleFactor", 1.f);
        }
        gSavedSettings.setBOOL("ResetUIScaleOnFirstRun", false);
    }

    // Get the real window rect the window was created with (since there are various OS-dependent reasons why
    // the size of a window or fullscreen context may have been adjusted slightly...)
    F32 ui_scale_factor = llclamp(gSavedSettings.getF32("UIScaleFactor") * mWindow->getSystemUISize(), MIN_UI_SCALE, MAX_UI_SCALE);

    mDisplayScale.setVec(llmax(1.f / mWindow->getPixelAspectRatio(), 1.f), llmax(mWindow->getPixelAspectRatio(), 1.f));
    mDisplayScale *= ui_scale_factor;
    LLUI::setScaleFactor(mDisplayScale);

    {
        LLCoordWindow size;
        mWindow->getSize(&size);
        mWindowRectRaw.set(0, size.mY, size.mX, 0);
        mWindowRectScaled.set(0, ll_round((F32)size.mY / mDisplayScale.mV[VY]), ll_round((F32)size.mX / mDisplayScale.mV[VX]), 0);
    }

    LLFontManager::initClass();

    // fonts use an GL_UNSIGNED_BYTE image format,
    // so they need convertion, init buffers if needed
    LLImageGL::allocateConversionBuffer();

    // Init font system, load default fonts and generate basic glyphs
    // currently it takes aprox. 0.5 sec and we would load these fonts anyway
    // before login screen.
    LLFontGL::initClass( gSavedSettings.getF32("FontScreenDPI"),
        mDisplayScale.mV[VX],
        mDisplayScale.mV[VY],
        gDirUtilp->getAppRODataDir());

    //
    // We want to set this stuff up BEFORE we initialize the pipeline, so we can turn off
    // stuff like AGP if we think that it'll crash the viewer.
    //
    LL_DEBUGS("Window") << "Loading feature tables." << LL_ENDL;

    // Initialize OpenGL Renderer
    LLVertexBuffer::initClass(mWindow);
    LL_INFOS("RenderInit") << "LLVertexBuffer initialization done." << LL_ENDL ;
    if (!gGL.init(true))
    {
        LLError::LLUserWarningMsg::show(LLTrans::getString("MBVideoDrvErr"));
        LL_ERRS() << "gGL not initialized" << LL_ENDL;
    }

    if (LLFeatureManager::getInstance()->isSafe()
        || (gSavedSettings.getS32("LastFeatureVersion") != LLFeatureManager::getInstance()->getVersion())
        || (gSavedSettings.getString("LastGPUString") != LLFeatureManager::getInstance()->getGPUString())
        || (gSavedSettings.getBOOL("ProbeHardwareOnStartup")))
    {
        LLFeatureManager::getInstance()->applyRecommendedSettings();
        gSavedSettings.setBOOL("ProbeHardwareOnStartup", false);
    }

    // If we crashed while initializng GL stuff last time, disable certain features
    if (gSavedSettings.getBOOL("RenderInitError"))
    {
        mInitAlert = "DisplaySettingsNoShaders";
        LLFeatureManager::getInstance()->setGraphicsLevel(0, false);
        gSavedSettings.setU32("RenderQualityPerformance", 0);
    }

    // Init the image list.  Must happen after GL is initialized and before the images that
    // LLViewerWindow needs are requested, as well as before LLViewerMedia starts updating images.
    LLImageGL::initClass(mWindow, LLViewerTexture::MAX_GL_IMAGE_CATEGORY, false, gSavedSettings.getBOOL("RenderGLMultiThreadedTextures"), gSavedSettings.getBOOL("RenderGLMultiThreadedMedia"));
    gTextureList.init();
    LLViewerTextureManager::init() ;
    gBumpImageList.init();

    // Create container for all sub-views
    LLView::Params rvp;
    rvp.name("root");
    rvp.rect(mWindowRectScaled);
    rvp.mouse_opaque(false);
    rvp.follows.flags(FOLLOWS_NONE);
    mRootView = LLUICtrlFactory::create<LLRootView>(rvp);
    LLUI::getInstance()->setRootView(mRootView);

    // Make avatar head look forward at start
    mCurrentMousePoint.mX = getWindowWidthScaled() / 2;
    mCurrentMousePoint.mY = getWindowHeightScaled() / 2;

    gShowOverlayTitle = gSavedSettings.getBOOL("ShowOverlayTitle");
    mOverlayTitle = gSavedSettings.getString("OverlayTitle");
    // Can't have spaces in settings.ini strings, so use underscores instead and convert them.
    LLStringUtil::replaceChar(mOverlayTitle, '_', ' ');

    mDebugText = new LLDebugText(this);

    mWorldViewRectScaled = calcScaledRect(mWorldViewRectRaw, mDisplayScale);
}

std::string LLViewerWindow::getLastSnapshotDir()
{
    return sSnapshotDir;
}

void LLViewerWindow::initGLDefaults()
{
    // RN: Need this for translation and stretch manip.
    gBox.prerender();
}

struct MainPanel : public LLPanel
{
};

void LLViewerWindow::initBase()
{
    S32 height = getWindowHeightScaled();
    S32 width = getWindowWidthScaled();

    LLRect full_window(0, height, width, 0);

    ////////////////////
    //
    // Set the gamma
    //

    F32 gamma = gSavedSettings.getF32("RenderGamma");
    if (gamma != 0.0f)
    {
        getWindow()->setGamma(gamma);
    }

    // Create global views

    // Login screen and main_view.xml need edit menus for preferences and browser
    LL_DEBUGS("AppInit") << "initializing edit menu" << LL_ENDL;
    initialize_edit_menu();

    LLFontGL::loadCommonFonts();

    // Create the floater view at the start so that other views can add children to it.
    // (But wait to add it as a child of the root view so that it will be in front of the
    // other views.)
    MainPanel* main_view = new MainPanel();
    if (!main_view->buildFromFile("main_view.xml"))
    {
        LL_ERRS() << "Failed to initialize viewer: Viewer couldn't process file main_view.xml, "
                << "if this problem happens again, please validate your installation." << LL_ENDL;
    }
    main_view->setShape(full_window);
    getRootView()->addChild(main_view);

    // placeholder widget that controls where "world" is rendered
    mWorldViewPlaceholder = main_view->getChildView("world_view_rect")->getHandle();
    mPopupView = main_view->getChild<LLPopupView>("popup_holder");
    mHintHolder = main_view->getChild<LLView>("hint_holder")->getHandle();
    mLoginPanelHolder = main_view->getChild<LLView>("login_panel_holder")->getHandle();
    mStatusBarContainer = main_view->getChild<LLPanel>("status_bar_container");
    mNavBarContainer = mStatusBarContainer->getChild<LLView>("nav_bar_container");
    mTopInfoContainer = main_view->getChild<LLPanel>("topinfo_bar_container");

    // Create the toolbar view
    // Get a pointer to the toolbar view holder
    LLPanel* panel_holder = main_view->getChild<LLPanel>("toolbar_view_holder");
    // Load the toolbar view from file
    gToolBarView = LLUICtrlFactory::getInstance()->createFromFile<LLToolBarView>("panel_toolbar_view.xml", panel_holder, LLDefaultChildRegistry::instance());
    if (!gToolBarView)
    {
        LL_ERRS() << "Failed to initialize viewer: Viewer couldn't process file panel_toolbar_view.xml, "
                << "if this problem happens again, please validate your installation." << LL_ENDL;
    }
    gToolBarView->setShape(panel_holder->getLocalRect());
    // Hide the toolbars for the moment: we'll make them visible after logging in world (see LLViewerWindow::initWorldUI())
    gToolBarView->setVisible(false);

    mFloaterSnapRegion = gToolBarView->getChild<LLView>("floater_snap_region");
    mChicletContainer = gToolBarView->getChild<LLPanel>("chiclet_container");
    // Constrain floaters to inside the menu and status bar regions.
    gFloaterView = main_view->getChild<LLFloaterView>("Floater View");
    for (S32 i = 0; i < LLToolBarEnums::TOOLBAR_COUNT; ++i)
    {
        LLToolBar * toolbarp = gToolBarView->getToolbar((LLToolBarEnums::EToolBarLocation)i);
        if (toolbarp)
        {
            toolbarp->getCenterLayoutPanel()->setReshapeCallback(boost::bind(&LLFloaterView::setToolbarRect, gFloaterView, _1, _2));
        }
    }
    gFloaterView->setFloaterSnapView(mFloaterSnapRegion->getHandle());
    gSnapshotFloaterView = main_view->getChild<LLSnapshotFloaterView>("Snapshot Floater View");

    const F32 CHAT_PERSIST_TIME = 20.f;

    // Console
    llassert( !gConsole );
    LLConsole::Params cp;
    cp.name("console");
    cp.max_lines(gSavedSettings.getS32("ConsoleBufferSize"));
    cp.rect(getChatConsoleRect());
    cp.persist_time(CHAT_PERSIST_TIME);
    cp.font_size_index(gSavedSettings.getS32("ChatFontSize"));
    cp.follows.flags(FOLLOWS_LEFT | FOLLOWS_RIGHT | FOLLOWS_BOTTOM);
    gConsole = LLUICtrlFactory::create<LLConsole>(cp);
    getRootView()->addChild(gConsole);

    // optionally forward warnings to chat console/chat floater
    // for qa runs and dev builds
#if  !LL_RELEASE_FOR_DOWNLOAD
    RecordToChatConsole::getInstance()->startRecorder();
#else
    if(gSavedSettings.getBOOL("QAMode"))
    {
        RecordToChatConsole::getInstance()->startRecorder();
    }
#endif

    gDebugView = getRootView()->getChild<LLDebugView>("DebugView");
    gDebugView->init();
    gToolTipView = getRootView()->getChild<LLToolTipView>("tooltip view");

    // Initialize do not disturb response message when logged in
    LLAppViewer::instance()->setOnLoginCompletedCallback(boost::bind(&LLFloaterPreference::initDoNotDisturbResponse));

    // Add the progress bar view (startup view), which overrides everything
    mProgressView = getRootView()->findChild<LLProgressView>("progress_view");
    setShowProgress(false);
    setProgressCancelButtonVisible(false);

    gMenuHolder = getRootView()->getChild<LLViewerMenuHolderGL>("Menu Holder");
    LLMenuGL::sMenuContainer = gMenuHolder;
}

void LLViewerWindow::initWorldUI()
{
    if (gNonInteractive)
    {
        gIMMgr = LLIMMgr::getInstance();
        LLNavigationBar::getInstance();
        gFloaterView->pushVisibleAll(false);
        return;
    }

    S32 height = mRootView->getRect().getHeight();
    S32 width = mRootView->getRect().getWidth();
    LLRect full_window(0, height, width, 0);


    gIMMgr = LLIMMgr::getInstance();

    //getRootView()->sendChildToFront(gFloaterView);
    //getRootView()->sendChildToFront(gSnapshotFloaterView);

    if (!gNonInteractive)
    {
        LLChicletBar* chiclet_bar = LLChicletBar::getInstance();
        chiclet_bar->setShape(mChicletContainer->getLocalRect());
        chiclet_bar->setFollowsAll();
        mChicletContainer->addChild(chiclet_bar);
        mChicletContainer->setVisible(true);
    }

    LLRect morph_view_rect = full_window;
    morph_view_rect.stretch( -STATUS_BAR_HEIGHT );
    morph_view_rect.mTop = full_window.mTop - 32;
    LLMorphView::Params mvp;
    mvp.name("MorphView");
    mvp.rect(morph_view_rect);
    mvp.visible(false);
    gMorphView = LLUICtrlFactory::create<LLMorphView>(mvp);
    getRootView()->addChild(gMorphView);

    LLWorldMapView::initClass();

    // Force gFloaterWorldMap to initialize
    LLFloaterReg::getInstance("world_map");

    // Force gFloaterTools to initialize
    LLFloaterReg::getInstance("build");

    LLNavigationBar* navbar = LLNavigationBar::getInstance();
    if (!gStatusBar)
    {
        // Status bar
        gStatusBar = new LLStatusBar(mStatusBarContainer->getLocalRect());
        gStatusBar->setFollows(FOLLOWS_LEFT | FOLLOWS_TOP | FOLLOWS_RIGHT);
        gStatusBar->setShape(mStatusBarContainer->getLocalRect());
        // sync bg color with menu bar
        gStatusBar->setBackgroundColor(gMenuBarView->getBackgroundColor());
        // add InBack so that gStatusBar won't be drawn over menu
        mStatusBarContainer->addChildInBack(gStatusBar, 2/*tab order, after menu*/);
        mStatusBarContainer->setVisible(true);

        // Navigation bar
        navbar->setShape(mNavBarContainer->getLocalRect());
        navbar->setBackgroundColor(gMenuBarView->getBackgroundColor());
        mNavBarContainer->addChild(navbar);
        mNavBarContainer->setVisible(true);
    }
    else
    {
        mStatusBarContainer->setVisible(true);
        mNavBarContainer->setVisible(true);
    }

    if (!gSavedSettings.getBOOL("ShowNavbarNavigationPanel"))
    {
        navbar->setVisible(false);
    }
    else
    {
        reshapeStatusBarContainer();
    }


    // Top Info bar
    LLPanelTopInfoBar* topinfo_bar = LLPanelTopInfoBar::getInstance();
    topinfo_bar->setShape(mTopInfoContainer->getLocalRect());

    mTopInfoContainer->addChild(topinfo_bar);
    mTopInfoContainer->setVisible(true);

    if (!gSavedSettings.getBOOL("ShowMiniLocationPanel"))
    {
        topinfo_bar->setVisible(false);
    }

    if ( gHUDView == NULL )
    {
        LLRect hud_rect = full_window;
        hud_rect.mBottom += 50;
        if (gMenuBarView && gMenuBarView->isInVisibleChain())
        {
            hud_rect.mTop -= gMenuBarView->getRect().getHeight();
        }
        gHUDView = new LLHUDView(hud_rect);
        getRootView()->addChild(gHUDView);
        getRootView()->sendChildToBack(gHUDView);
    }

    LLPanel* panel_ssf_container = gToolBarView->getChild<LLPanel>("state_management_buttons_container");

    LLPanelStandStopFlying* panel_stand_stop_flying = LLPanelStandStopFlying::getInstance();
    panel_ssf_container->addChild(panel_stand_stop_flying);

    LLPanelHideBeacon* panel_hide_beacon = LLPanelHideBeacon::getInstance();
    panel_ssf_container->addChild(panel_hide_beacon);

    panel_ssf_container->setVisible(true);

    LLMenuOptionPathfindingRebakeNavmesh::getInstance()->initialize();

    // Load and make the toolbars visible
    // Note: we need to load the toolbars only *after* the user is logged in and IW
    if (gToolBarView)
    {
        gToolBarView->loadToolbars();
        gToolBarView->setVisible(true);
    }

    if (!gNonInteractive)
    {
        LLMediaCtrl* destinations = LLFloaterReg::getInstance("destinations")->getChild<LLMediaCtrl>("destination_guide_contents");
        if (destinations)
        {
            destinations->setErrorPageURL(gSavedSettings.getString("GenericErrorPageURL"));
            std::string url = gSavedSettings.getString("DestinationGuideURL");
            url = LLWeb::expandURLSubstitutions(url, LLSD());
            destinations->navigateTo(url, HTTP_CONTENT_TEXT_HTML);
        }
        LLMediaCtrl* avatar_picker = LLFloaterReg::getInstance("avatar")->findChild<LLMediaCtrl>("avatar_picker_contents");
        if (avatar_picker)
        {
            avatar_picker->setErrorPageURL(gSavedSettings.getString("GenericErrorPageURL"));
            std::string url = gSavedSettings.getString("AvatarPickerURL");
            url = LLWeb::expandURLSubstitutions(url, LLSD());
            avatar_picker->navigateTo(url, HTTP_CONTENT_TEXT_HTML);
        }
    }
}

// Destroy the UI
void LLViewerWindow::shutdownViews()
{
    // clean up warning logger
    RecordToChatConsole::getInstance()->stopRecorder();
    LL_INFOS() << "Warning logger is cleaned." << LL_ENDL ;

    gFocusMgr.unlockFocus();
    gFocusMgr.setMouseCapture(NULL);
    gFocusMgr.setKeyboardFocus(NULL);
    gFocusMgr.setTopCtrl(NULL);
    if (mWindow)
    {
        mWindow->allowLanguageTextInput(NULL, false);
    }

    delete mDebugText;
    mDebugText = NULL;

    LL_INFOS() << "DebugText deleted." << LL_ENDL ;

    // Cleanup global views
    if (gMorphView)
    {
        gMorphView->setVisible(false);
    }
    LL_INFOS() << "Global views cleaned." << LL_ENDL ;

    LLNotificationsUI::LLToast::cleanupToasts();
    LL_INFOS() << "Leftover toast cleaned up." << LL_ENDL;

    // DEV-40930: Clear sModalStack. Otherwise, any LLModalDialog left open
    // will crump with LL_ERRS.
    LLModalDialog::shutdownModals();
    LL_INFOS() << "LLModalDialog shut down." << LL_ENDL;

    // destroy the nav bar, not currently part of gViewerWindow
    // *TODO: Make LLNavigationBar part of gViewerWindow
    LLNavigationBar::deleteSingleton();
    LL_INFOS() << "LLNavigationBar destroyed." << LL_ENDL ;

    // destroy menus after instantiating navbar above, as it needs
    // access to gMenuHolder
    cleanup_menus();
    LL_INFOS() << "menus destroyed." << LL_ENDL ;

    view_listener_t::cleanup();
    LL_INFOS() << "view listeners destroyed." << LL_ENDL ;

    // Clean up pointers that are going to be invalid. (todo: check sMenuContainer)
    mProgressView = NULL;
    mPopupView = NULL;

    // Delete all child views.
    delete mRootView;
    mRootView = NULL;
    LL_INFOS() << "RootView deleted." << LL_ENDL ;

    LLMenuOptionPathfindingRebakeNavmesh::getInstance()->quit();

    // Automatically deleted as children of mRootView.  Fix the globals.
    gStatusBar = NULL;
    gIMMgr = NULL;
    gToolTipView = NULL;

    gToolBarView = NULL;
    gFloaterView = NULL;
    gMorphView = NULL;

    gHUDView = NULL;
}

void LLViewerWindow::shutdownGL()
{
    //--------------------------------------------------------
    // Shutdown GL cleanly.  Order is very important here.
    //--------------------------------------------------------
    LLFontGL::destroyDefaultFonts();
    SUBSYSTEM_CLEANUP(LLFontManager);
    stop_glerror();

    gSky.cleanup();
    stop_glerror();

    LL_INFOS() << "Cleaning up pipeline" << LL_ENDL;
    gPipeline.cleanup();
    stop_glerror();

    //MUST clean up pipeline before cleaning up wearables
    LL_INFOS() << "Cleaning up wearables" << LL_ENDL;
    LLWearableList::instance().cleanup() ;

    gTextureList.shutdown();
    stop_glerror();

    gBumpImageList.shutdown();
    stop_glerror();

    LLWorldMapView::cleanupTextures();

    LLViewerTextureManager::cleanup() ;
    SUBSYSTEM_CLEANUP(LLImageGL) ;

    LL_INFOS() << "All textures and llimagegl images are destroyed!" << LL_ENDL ;

    LL_INFOS() << "Cleaning up select manager" << LL_ENDL;
    LLSelectMgr::getInstance()->cleanup();

    LL_INFOS() << "Stopping GL during shutdown" << LL_ENDL;
    stopGL();
    stop_glerror();

    gGL.shutdown();

    SUBSYSTEM_CLEANUP(LLVertexBuffer);

    LL_INFOS() << "LLVertexBuffer cleaned." << LL_ENDL ;
}

// shutdownViews() and shutdownGL() need to be called first
LLViewerWindow::~LLViewerWindow()
{
    LL_INFOS() << "Destroying Window" << LL_ENDL;
    destroyWindow();

    delete mDebugText;
    mDebugText = NULL;

    if (LLViewerShaderMgr::sInitialized)
    {
        LLViewerShaderMgr::releaseInstance();
        LLViewerShaderMgr::sInitialized = false;
    }
}


void LLViewerWindow::setCursor( ECursorType c )
{
    mWindow->setCursor( c );
}

void LLViewerWindow::showCursor()
{
    mWindow->showCursor();

    mCursorHidden = false;
}

void LLViewerWindow::hideCursor()
{
    // And hide the cursor
    mWindow->hideCursor();

    mCursorHidden = true;
}

void LLViewerWindow::sendShapeToSim()
{
    LLMessageSystem* msg = gMessageSystem;
    if(!msg) return;
    msg->newMessageFast(_PREHASH_AgentHeightWidth);
    msg->nextBlockFast(_PREHASH_AgentData);
    msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
    msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
    msg->addU32Fast(_PREHASH_CircuitCode, gMessageSystem->mOurCircuitCode);
    msg->nextBlockFast(_PREHASH_HeightWidthBlock);
    msg->addU32Fast(_PREHASH_GenCounter, 0);
    U16 height16 = (U16) mWorldViewRectRaw.getHeight();
    U16 width16 = (U16) mWorldViewRectRaw.getWidth();
    msg->addU16Fast(_PREHASH_Height, height16);
    msg->addU16Fast(_PREHASH_Width, width16);
    gAgent.sendReliableMessage();
}

// Must be called after window is created to set up agent
// camera variables and UI variables.
void LLViewerWindow::reshape(S32 width, S32 height)
{
    // Destroying the window at quit time generates spurious
    // reshape messages.  We don't care about these, and we
    // don't want to send messages because the message system
    // may have been destructed.
    if (!LLApp::isExiting())
    {
        gWindowResized = true;

        // update our window rectangle
        mWindowRectRaw.mRight = mWindowRectRaw.mLeft + width;
        mWindowRectRaw.mTop = mWindowRectRaw.mBottom + height;

        //glViewport(0, 0, width, height );

        LLViewerCamera * camera = LLViewerCamera::getInstance(); // simpleton, might not exist
        if (height > 0 && camera)
        {
            camera->setViewHeightInPixels( mWorldViewRectRaw.getHeight() );
            camera->setAspect( getWorldViewAspectRatio() );
        }

        calcDisplayScale();

        bool display_scale_changed = mDisplayScale != LLUI::getScaleFactor();
        LLUI::setScaleFactor(mDisplayScale);

        // update our window rectangle
        mWindowRectScaled.mRight = mWindowRectScaled.mLeft + ll_round((F32)width / mDisplayScale.mV[VX]);
        mWindowRectScaled.mTop = mWindowRectScaled.mBottom + ll_round((F32)height / mDisplayScale.mV[VY]);

        setup2DViewport();

        // Inform lower views of the change
        // round up when converting coordinates to make sure there are no gaps at edge of window
        LLView::sForceReshape = display_scale_changed;
        mRootView->reshape(llceil((F32)width / mDisplayScale.mV[VX]), llceil((F32)height / mDisplayScale.mV[VY]));
        if (display_scale_changed)
        {
            // Needs only a 'scale change' update, everything else gets handled by LLLayoutStack::updateClass()
            LLPanelLogin::reshapePanel();
        }
        LLView::sForceReshape = false;

        // clear font width caches
        if (display_scale_changed)
        {
            LLHUDObject::reshapeAll();
        }

        sendShapeToSim();

        // store new settings for the mode we are in, regardless
        bool maximized = mWindow->getMaximized();
        gSavedSettings.setBOOL("WindowMaximized", maximized);

        if (!maximized)
        {
            U32 min_window_width=gSavedSettings.getU32("MinWindowWidth");
            U32 min_window_height=gSavedSettings.getU32("MinWindowHeight");
            // tell the OS specific window code about min window size
            mWindow->setMinSize(min_window_width, min_window_height);

            LLCoordScreen window_rect;
            if (!gNonInteractive && mWindow->getSize(&window_rect))
            {
            // Only save size if not maximized
                gSavedSettings.setU32("WindowWidth", window_rect.mX);
                gSavedSettings.setU32("WindowHeight", window_rect.mY);
            }
        }

        sample(LLStatViewer::WINDOW_WIDTH, width);
        sample(LLStatViewer::WINDOW_HEIGHT, height);

        LLLayoutStack::updateClass();
    }
}


// Hide normal UI when a logon fails
void LLViewerWindow::setNormalControlsVisible( bool visible )
{
    if(LLChicletBar::instanceExists())
    {
        LLChicletBar::getInstance()->setVisible(visible);
        LLChicletBar::getInstance()->setEnabled(visible);
    }

    if ( gMenuBarView )
    {
        gMenuBarView->setVisible( visible );
        gMenuBarView->setEnabled( visible );

        // ...and set the menu color appropriately.
        setMenuBackgroundColor(gAgent.getGodLevel() > GOD_NOT,
            LLGridManager::getInstance()->isInProductionGrid());
    }

    if ( gStatusBar )
    {
        gStatusBar->setVisible( visible );
        gStatusBar->setEnabled( visible );
    }

    if (mNavBarContainer)
    {
        // when it's time to show navigation bar we need to ensure that the user wants to see it
        // i.e. ShowNavbarNavigationPanel option is true
        mNavBarContainer->setVisible( visible && gSavedSettings.getBOOL("ShowNavbarNavigationPanel") );
    }
}

void LLViewerWindow::setMenuBackgroundColor(bool god_mode, bool dev_grid)
{
    LLSD args;
    LLUIColor new_bg_color;

    // god more important than project, proj more important than grid
    if ( god_mode )
    {
        if ( LLGridManager::getInstance()->isInProductionGrid() )
        {
            new_bg_color = LLUIColorTable::instance().getColor( "MenuBarGodBgColor" );
        }
        else
        {
            new_bg_color = LLUIColorTable::instance().getColor( "MenuNonProductionGodBgColor" );
        }
    }
    else
    {
        switch (LLVersionInfo::instance().getViewerMaturity())
        {
        case LLVersionInfo::TEST_VIEWER:
            new_bg_color = LLUIColorTable::instance().getColor( "MenuBarTestBgColor" );
            break;

        case LLVersionInfo::PROJECT_VIEWER:
            new_bg_color = LLUIColorTable::instance().getColor( "MenuBarProjectBgColor" );
            break;

        case LLVersionInfo::BETA_VIEWER:
            new_bg_color = LLUIColorTable::instance().getColor( "MenuBarBetaBgColor" );
            break;

        case LLVersionInfo::RELEASE_VIEWER:
            if(!LLGridManager::getInstance()->isInProductionGrid())
            {
                new_bg_color = LLUIColorTable::instance().getColor( "MenuNonProductionBgColor" );
            }
            else
            {
                new_bg_color = LLUIColorTable::instance().getColor( "MenuBarBgColor" );
            }
            break;
        }
    }

    if(gMenuBarView)
    {
        gMenuBarView->setBackgroundColor( new_bg_color );
    }

    if(gStatusBar)
    {
        gStatusBar->setBackgroundColor( new_bg_color );
    }
}

void LLViewerWindow::drawDebugText()
{
    gUIProgram.bind();
    gGL.color4f(1,1,1,1);
    gGL.pushMatrix();
    gGL.pushUIMatrix();
    {
        // scale view by UI global scale factor and aspect ratio correction factor
        gGL.scaleUI(mDisplayScale.mV[VX], mDisplayScale.mV[VY], 1.f);
        mDebugText->draw();
    }
    gGL.popUIMatrix();
    gGL.popMatrix();

    gGL.flush();
    gUIProgram.unbind();
}

void LLViewerWindow::draw()
{

//#if LL_DEBUG
    LLView::sIsDrawing = true;
//#endif
    stop_glerror();

    LLUI::setLineWidth(1.f);

    LLUI::setLineWidth(1.f);
    // Reset any left-over transforms
    gGL.matrixMode(LLRender::MM_MODELVIEW);

    gGL.loadIdentity();

    //S32 screen_x, screen_y;

    if (!LLPipeline::RenderUIBuffer)
    {
        LLView::sDirtyRect = getWindowRectScaled();
    }

    // HACK for timecode debugging
    if (gSavedSettings.getBOOL("DisplayTimecode"))
    {
        // draw timecode block
        std::string text;

        gGL.loadIdentity();

        microsecondsToTimecodeString(gFrameTime,text);
        const LLFontGL* font = LLFontGL::getFontSansSerif();
        font->renderUTF8(text, 0,
                        ll_round((getWindowWidthScaled()/2)-100.f),
                        ll_round((getWindowHeightScaled()-60.f)),
            LLColor4( 1.f, 1.f, 1.f, 1.f ),
            LLFontGL::LEFT, LLFontGL::TOP);
    }

    // Draw all nested UI views.
    // No translation needed, this view is glued to 0,0

    gUIProgram.bind();
    gGL.color4f(1, 1, 1, 1);

    gGL.pushMatrix();
    LLUI::pushMatrix();
    {

        // scale view by UI global scale factor and aspect ratio correction factor
        gGL.scaleUI(mDisplayScale.mV[VX], mDisplayScale.mV[VY], 1.f);

        LLVector2 old_scale_factor = LLUI::getScaleFactor();
        // apply camera zoom transform (for high res screenshots)
        F32 zoom_factor = LLViewerCamera::getInstance()->getZoomFactor();
        S16 sub_region = LLViewerCamera::getInstance()->getZoomSubRegion();
        if (zoom_factor > 1.f)
        {
            //decompose subregion number to x and y values
            int pos_y = sub_region / llceil(zoom_factor);
            int pos_x = sub_region - (pos_y*llceil(zoom_factor));
            // offset for this tile
            gGL.translatef((F32)getWindowWidthScaled() * -(F32)pos_x,
                        (F32)getWindowHeightScaled() * -(F32)pos_y,
                        0.f);
            gGL.scalef(zoom_factor, zoom_factor, 1.f);
            LLUI::getScaleFactor() *= zoom_factor;
        }

        // Draw tool specific overlay on world
        LLToolMgr::getInstance()->getCurrentTool()->draw();

        if( gAgentCamera.cameraMouselook() || LLFloaterCamera::inFreeCameraMode() )
        {
            drawMouselookInstructions();
            stop_glerror();
        }

        // Draw all nested UI views.
        // No translation needed, this view is glued to 0,0
        mRootView->draw();

        if (LLView::sDebugRects)
        {
            gToolTipView->drawStickyRect();
        }

        // Draw optional on-top-of-everyone view
        LLUICtrl* top_ctrl = gFocusMgr.getTopCtrl();
        if (top_ctrl && top_ctrl->getVisible())
        {
            S32 screen_x, screen_y;
            top_ctrl->localPointToScreen(0, 0, &screen_x, &screen_y);

            gGL.matrixMode(LLRender::MM_MODELVIEW);
            LLUI::pushMatrix();
            LLUI::translate( (F32) screen_x, (F32) screen_y);
            top_ctrl->draw();
            LLUI::popMatrix();
        }


        if( gShowOverlayTitle && !mOverlayTitle.empty() )
        {
            // Used for special titles such as "Second Life - Special E3 2003 Beta"
            const S32 DIST_FROM_TOP = 20;
            LLFontGL::getFontSansSerifBig()->renderUTF8(
                mOverlayTitle, 0,
                ll_round( getWindowWidthScaled() * 0.5f),
                getWindowHeightScaled() - DIST_FROM_TOP,
                LLColor4(1, 1, 1, 0.4f),
                LLFontGL::HCENTER, LLFontGL::TOP);
        }

        LLUI::setScaleFactor(old_scale_factor);
    }
    LLUI::popMatrix();
    gGL.popMatrix();

    gUIProgram.unbind();

    LLView::sIsDrawing = false;
}

// Takes a single keyup event, usually when UI is visible
bool LLViewerWindow::handleKeyUp(KEY key, MASK mask)
{
    if (LLSetKeyBindDialog::recordKey(key, mask, false))
    {
        LL_DEBUGS() << "KeyUp handled by LLSetKeyBindDialog" << LL_ENDL;
        LLViewerEventRecorder::instance().logKeyEvent(key, mask);
        return true;
    }

    LLFocusableElement* keyboard_focus = gFocusMgr.getKeyboardFocus();

    if (keyboard_focus
        && !(mask & (MASK_CONTROL | MASK_ALT))
        && !gFocusMgr.getKeystrokesOnly())
    {
        // We have keyboard focus, and it's not an accelerator
        if (keyboard_focus && keyboard_focus->wantsKeyUpKeyDown())
        {
            return keyboard_focus->handleKeyUp(key, mask, false);
        }
        else if (key < 0x80)
        {
            // Not a special key, so likely (we hope) to generate a character.  Let it fall through to character handler first.
            return (gFocusMgr.getKeyboardFocus() != NULL);
        }
    }

    if (keyboard_focus)
    {
        if (keyboard_focus->handleKeyUp(key, mask, false))
        {
            LL_DEBUGS() << "LLviewerWindow::handleKeyUp - in 'traverse up' - no loops seen... just called keyboard_focus->handleKeyUp an it returned true" << LL_ENDL;
            LLViewerEventRecorder::instance().logKeyEvent(key, mask);
            return true;
        }
        else {
            LL_DEBUGS() << "LLviewerWindow::handleKeyUp - in 'traverse up' - no loops seen... just called keyboard_focus->handleKeyUp an it returned false" << LL_ENDL;
        }
    }

    // Try for a new-format gesture
    if (LLGestureMgr::instance().triggerGestureRelease(key, mask))
    {
        LL_DEBUGS() << "LLviewerWindow::handleKey new gesture release feature" << LL_ENDL;
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }
    //Old format gestures do not support this, so no need to implement it.

    // don't pass keys on to world when something in ui has focus
    return gFocusMgr.childHasKeyboardFocus(mRootView)
        || LLMenuGL::getKeyboardMode()
        || (gMenuBarView && gMenuBarView->getHighlightedItem() && gMenuBarView->getHighlightedItem()->isActive());
}

// Takes a single keydown event, usually when UI is visible
bool LLViewerWindow::handleKey(KEY key, MASK mask)
{
    // hide tooltips on keypress
    LLToolTipMgr::instance().blockToolTips();

    // Menus get handled on key down instead of key up
    // so keybindings have to be recorded before that
    if (LLSetKeyBindDialog::recordKey(key, mask, true))
    {
        LL_DEBUGS() << "Key handled by LLSetKeyBindDialog" << LL_ENDL;
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }

    LLFocusableElement* keyboard_focus = gFocusMgr.getKeyboardFocus();

    if (keyboard_focus
        && !gFocusMgr.getKeystrokesOnly())
    {
        //Most things should fall through, but mouselook is an exception,
        //don't switch to mouselook if any floater has focus
        if ((key == KEY_MOUSELOOK) && !(mask & (MASK_CONTROL | MASK_ALT)))
        {
            return true;
        }

        LLUICtrl* cur_focus = dynamic_cast<LLUICtrl*>(keyboard_focus);
        if (cur_focus && cur_focus->acceptsTextInput())
        {
#ifdef LL_WINDOWS
            // On windows Alt Gr key generates additional Ctrl event, as result handling situations
            // like 'AltGr + D' will result in 'Alt+Ctrl+D'. If it results in WM_CHAR, don't let it
            // pass into menu or it will trigger 'develop' menu assigned to this combination on top
            // of character handling.
            // Alt Gr can be additionally modified by Shift
            const MASK alt_gr = MASK_CONTROL | MASK_ALT;
            LLWindowWin32 *window = static_cast<LLWindowWin32*>(mWindow);
            U32 raw_key = window->getRawWParam();
            if ((mask & alt_gr) != 0
                && ((raw_key >= 0x30 && raw_key <= 0x5A) //0-9, plus normal chartacters
                    || (raw_key >= 0xBA && raw_key <= 0xE4)) // Misc/OEM characters that can be covered by AltGr, ex: -, =, ~
                && (GetKeyState(VK_RMENU) & 0x8000) != 0
                && (GetKeyState(VK_RCONTROL) & 0x8000) == 0) // ensure right control is not pressed, only left one
            {
                // Alt Gr key is represented as right alt and left control.
                // Any alt+ctrl combination is treated as Alt Gr by TranslateMessage() and
                // will generate a WM_CHAR message, but here we only treat virtual Alt Graph
                // key by checking if this specific combination has unicode char.
                //
                // I decided to handle only virtual RAlt+LCtrl==AltGr combination to minimize
                // impact on menu, but the right way might be to handle all Alt+Ctrl calls.

                BYTE keyboard_state[256];
                if (GetKeyboardState(keyboard_state))
                {
                    const int char_count = 6;
                    wchar_t chars[char_count];
                    HKL layout = GetKeyboardLayout(0);
                    // ToUnicodeEx changes buffer state on OS below Win10, which is undesirable,
                    // but since we already did a TranslateMessage() in gatherInput(), this
                    // should have no negative effect
                    // ToUnicodeEx works with virtual key codes
                    int res = ToUnicodeEx(raw_key, 0, keyboard_state, chars, char_count, 1 << 2 /*do not modify buffer flag*/, layout);
                    if (res == 1 && chars[0] >= 0x20)
                    {
                        // Let it fall through to character handler and get a WM_CHAR.
                        return true;
                    }
                }
            }
#endif

            if (!(mask & (MASK_CONTROL | MASK_ALT)))
            {
                // We have keyboard focus, and it's not an accelerator
                if (keyboard_focus && keyboard_focus->wantsKeyUpKeyDown())
                {
                    return keyboard_focus->handleKey(key, mask, false);
                }
                else if (key < 0x80)
                {
                    // Not a special key, so likely (we hope) to generate a character.  Let it fall through to character handler first.
                    return true;
                }
            }
        }
    }

    // let menus handle navigation keys for navigation
    if ((gMenuBarView && gMenuBarView->handleKey(key, mask, true))
        ||(gLoginMenuBarView && gLoginMenuBarView->handleKey(key, mask, true))
        ||(gMenuHolder && gMenuHolder->handleKey(key, mask, true)))
    {
        LL_DEBUGS() << "LLviewerWindow::handleKey handle nav keys for nav" << LL_ENDL;
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }


    // give menus a chance to handle modified (Ctrl, Alt) shortcut keys before current focus
    // as long as focus isn't locked
    if (mask & (MASK_CONTROL | MASK_ALT) && !gFocusMgr.focusLocked())
    {
        // Check the current floater's menu first, if it has one.
        if (gFocusMgr.keyboardFocusHasAccelerators()
            && keyboard_focus
            && keyboard_focus->handleKey(key,mask,false))
        {
            LLViewerEventRecorder::instance().logKeyEvent(key,mask);
            return true;
        }

        if (gAgent.isInitialized()
            && (gAgent.getTeleportState() == LLAgent::TELEPORT_NONE || gAgent.getTeleportState() == LLAgent::TELEPORT_LOCAL)
            && gMenuBarView
            && gMenuBarView->handleAcceleratorKey(key, mask))
        {
            LLViewerEventRecorder::instance().logKeyEvent(key, mask);
            return true;
        }

        if (gLoginMenuBarView && gLoginMenuBarView->handleAcceleratorKey(key, mask))
        {
            LLViewerEventRecorder::instance().logKeyEvent(key,mask);
            return true;
        }
    }

    // give floaters first chance to handle TAB key
    // so frontmost floater gets focus
    // if nothing has focus, go to first or last UI element as appropriate
    if (key == KEY_TAB && (mask & MASK_CONTROL || keyboard_focus == NULL))
    {
        LL_WARNS() << "LLviewerWindow::handleKey give floaters first chance at tab key " << LL_ENDL;
        if (gMenuHolder) gMenuHolder->hideMenus();

        // if CTRL-tabbing (and not just TAB with no focus), go into window cycle mode
        gFloaterView->setCycleMode((mask & MASK_CONTROL) != 0);

        // do CTRL-TAB and CTRL-SHIFT-TAB logic
        if (mask & MASK_SHIFT)
        {
            mRootView->focusPrevRoot();
        }
        else
        {
            mRootView->focusNextRoot();
        }
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }
    // hidden edit menu for cut/copy/paste
    if (gEditMenu && gEditMenu->handleAcceleratorKey(key, mask))
    {
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }

    LLFloater* focused_floaterp = gFloaterView->getFocusedFloater();
    std::string focusedFloaterName = (focused_floaterp ? focused_floaterp->getInstanceName() : "");

    if( keyboard_focus )
    {
        if ((focusedFloaterName == "nearby_chat") || (focusedFloaterName == "im_container") || (focusedFloaterName == "impanel"))
        {
            if (gSavedSettings.getBOOL("ArrowKeysAlwaysMove"))
            {
                // let Control-Up and Control-Down through for chat line history,
                if (!(key == KEY_UP && mask == MASK_CONTROL)
                    && !(key == KEY_DOWN && mask == MASK_CONTROL)
                    && !(key == KEY_UP && mask == MASK_ALT)
                    && !(key == KEY_DOWN && mask == MASK_ALT))
                {
                    switch(key)
                    {
                    case KEY_LEFT:
                    case KEY_RIGHT:
                    case KEY_UP:
                    case KEY_DOWN:
                    case KEY_PAGE_UP:
                    case KEY_PAGE_DOWN:
                    case KEY_HOME:
                    case KEY_END:
                        // when chatbar is empty or ArrowKeysAlwaysMove set,
                        // pass arrow keys on to avatar...
                        return false;
                    default:
                        break;
                    }
                }
        }
        }

        if (keyboard_focus->handleKey(key, mask, false))
        {

            LL_DEBUGS() << "LLviewerWindow::handleKey - in 'traverse up' - no loops seen... just called keyboard_focus->handleKey an it returned true" << LL_ENDL;
            LLViewerEventRecorder::instance().logKeyEvent(key,mask);
            return true;
        } else {
            LL_DEBUGS() << "LLviewerWindow::handleKey - in 'traverse up' - no loops seen... just called keyboard_focus->handleKey an it returned false" << LL_ENDL;
        }
    }

    if( LLToolMgr::getInstance()->getCurrentTool()->handleKey(key, mask) )
    {
        LL_DEBUGS() << "LLviewerWindow::handleKey toolbar handling?" << LL_ENDL;
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }

    // Try for a new-format gesture
    if (LLGestureMgr::instance().triggerGesture(key, mask))
    {
        LL_DEBUGS() << "LLviewerWindow::handleKey new gesture feature" << LL_ENDL;
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }

    // See if this is a gesture trigger.  If so, eat the key and
    // don't pass it down to the menus.
    if (gGestureList.trigger(key, mask))
    {
        LL_DEBUGS() << "LLviewerWindow::handleKey check gesture trigger" << LL_ENDL;
        LLViewerEventRecorder::instance().logKeyEvent(key,mask);
        return true;
    }

    // If "Pressing letter keys starts local chat" option is selected, we are not in mouselook,
    // no view has keyboard focus, this is a printable character key (and no modifier key is
    // pressed except shift), then give focus to nearby chat (STORM-560)
    if ( LLStartUp::getStartupState() >= STATE_STARTED &&
        gSavedSettings.getS32("LetterKeysFocusChatBar") && !gAgentCamera.cameraMouselook() &&
        !keyboard_focus && key < 0x80 && (mask == MASK_NONE || mask == MASK_SHIFT) )
    {
        // Initialize nearby chat if it's missing
        LLFloaterIMNearbyChat* nearby_chat = LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat");
        if (!nearby_chat)
        {
            LLSD name("im_container");
            LLFloaterReg::toggleInstanceOrBringToFront(name);
        }

        LLChatEntry* chat_editor = LLFloaterReg::findTypedInstance<LLFloaterIMNearbyChat>("nearby_chat")->getChatBox();
        if (chat_editor)
        {
            // passing NULL here, character will be added later when it is handled by character handler.
            nearby_chat->startChat(NULL);
            return true;
        }
    }

    // give menus a chance to handle unmodified accelerator keys
    if (gAgent.isInitialized()
        && (gAgent.getTeleportState() == LLAgent::TELEPORT_NONE || gAgent.getTeleportState() == LLAgent::TELEPORT_LOCAL)
        && gMenuBarView
        && gMenuBarView->handleAcceleratorKey(key, mask))
    {
        LLViewerEventRecorder::instance().logKeyEvent(key, mask);
        return true;
    }

    if (gLoginMenuBarView && gLoginMenuBarView->handleAcceleratorKey(key, mask))
    {
        return true;
    }

    // don't pass keys on to world when something in ui has focus
    return gFocusMgr.childHasKeyboardFocus(mRootView)
        || LLMenuGL::getKeyboardMode()
        || (gMenuBarView && gMenuBarView->getHighlightedItem() && gMenuBarView->getHighlightedItem()->isActive());
}


bool LLViewerWindow::handleUnicodeChar(llwchar uni_char, MASK mask)
{
    // HACK:  We delay processing of return keys until they arrive as a Unicode char,
    // so that if you're typing chat text at low frame rate, we don't send the chat
    // until all keystrokes have been entered. JC
    // HACK: Numeric keypad <enter> on Mac is Unicode 3
    // HACK: Control-M on Windows is Unicode 13
    if ((uni_char == 13 && mask != MASK_CONTROL)
        || (uni_char == 3 && mask == MASK_NONE) )
    {
        if (mask != MASK_ALT)
        {
            // remaps, handles ignored cases and returns back to viewer window.
            return gViewerInput.handleKey(KEY_RETURN, mask, gKeyboard->getKeyRepeated(KEY_RETURN));
        }
    }

    // let menus handle navigation (jump) keys
    if (gMenuBarView && gMenuBarView->handleUnicodeChar(uni_char, true))
    {
        return true;
    }

    // Traverses up the hierarchy
    LLFocusableElement* keyboard_focus = gFocusMgr.getKeyboardFocus();
    if( keyboard_focus )
    {
        if (keyboard_focus->handleUnicodeChar(uni_char, false))
        {
            return true;
        }

        return true;
    }

    return false;
}


void LLViewerWindow::handleScrollWheel(S32 clicks)
{
    LLUI::getInstance()->resetMouseIdleTimer();

    LLMouseHandler* mouse_captor = gFocusMgr.getMouseCapture();
    if( mouse_captor )
    {
        S32 local_x;
        S32 local_y;
        mouse_captor->screenPointToLocal( mCurrentMousePoint.mX, mCurrentMousePoint.mY, &local_x, &local_y );
        mouse_captor->handleScrollWheel(local_x, local_y, clicks);
        if (LLView::sDebugMouseHandling)
        {
            LL_INFOS() << "Scroll Wheel handled by captor " << mouse_captor->getName() << LL_ENDL;
        }
        return;
    }

    LLUICtrl* top_ctrl = gFocusMgr.getTopCtrl();
    if (top_ctrl)
    {
        S32 local_x;
        S32 local_y;
        top_ctrl->screenPointToLocal( mCurrentMousePoint.mX, mCurrentMousePoint.mY, &local_x, &local_y );
        if (top_ctrl->handleScrollWheel(local_x, local_y, clicks)) return;
    }

    if (mRootView->handleScrollWheel(mCurrentMousePoint.mX, mCurrentMousePoint.mY, clicks) )
    {
        if (LLView::sDebugMouseHandling)
        {
            LL_INFOS() << "Scroll Wheel" << LLView::sMouseHandlerMessage << LL_ENDL;
        }
        return;
    }
    else if (LLView::sDebugMouseHandling)
    {
        LL_INFOS() << "Scroll Wheel not handled by view" << LL_ENDL;
    }

    // Zoom the camera in and out behavior

    if(top_ctrl == 0
        && getWorldViewRectScaled().pointInRect(mCurrentMousePoint.mX, mCurrentMousePoint.mY)
        && gAgentCamera.isInitialized())
        gAgentCamera.handleScrollWheel(clicks);

    return;
}

void LLViewerWindow::handleScrollHWheel(S32 clicks)
{
    if (LLAppViewer::instance()->quitRequested())
    {
        return;
    }

    LLUI::getInstance()->resetMouseIdleTimer();

    LLMouseHandler* mouse_captor = gFocusMgr.getMouseCapture();
    if (mouse_captor)
    {
        S32 local_x;
        S32 local_y;
        mouse_captor->screenPointToLocal(mCurrentMousePoint.mX, mCurrentMousePoint.mY, &local_x, &local_y);
        mouse_captor->handleScrollHWheel(local_x, local_y, clicks);
        if (LLView::sDebugMouseHandling)
        {
            LL_INFOS() << "Scroll Horizontal Wheel handled by captor " << mouse_captor->getName() << LL_ENDL;
        }
        return;
    }

    LLUICtrl* top_ctrl = gFocusMgr.getTopCtrl();
    if (top_ctrl)
    {
        S32 local_x;
        S32 local_y;
        top_ctrl->screenPointToLocal(mCurrentMousePoint.mX, mCurrentMousePoint.mY, &local_x, &local_y);
        if (top_ctrl->handleScrollHWheel(local_x, local_y, clicks)) return;
    }

    if (mRootView->handleScrollHWheel(mCurrentMousePoint.mX, mCurrentMousePoint.mY, clicks))
    {
        if (LLView::sDebugMouseHandling)
        {
            LL_INFOS() << "Scroll Horizontal Wheel" << LLView::sMouseHandlerMessage << LL_ENDL;
        }
        return;
    }
    else if (LLView::sDebugMouseHandling)
    {
        LL_INFOS() << "Scroll Horizontal Wheel not handled by view" << LL_ENDL;
    }

    return;
}

void LLViewerWindow::addPopup(LLView* popup)
{
    if (mPopupView)
    {
        mPopupView->addPopup(popup);
    }
}

void LLViewerWindow::removePopup(LLView* popup)
{
    if (mPopupView)
    {
        mPopupView->removePopup(popup);
    }
}

void LLViewerWindow::clearPopups()
{
    if (mPopupView)
    {
        mPopupView->clearPopups();
    }
}

void LLViewerWindow::moveCursorToCenter()
{
    if (! gSavedSettings.getBOOL("DisableMouseWarp"))
    {
        S32 x = getWorldViewWidthScaled() / 2;
        S32 y = getWorldViewHeightScaled() / 2;

        LLUI::getInstance()->setMousePositionScreen(x, y);

        //on a forced move, all deltas get zeroed out to prevent jumping
        mCurrentMousePoint.set(x,y);
        mLastMousePoint.set(x,y);
        mCurrentMouseDelta.set(0,0);
    }
}


//////////////////////////////////////////////////////////////////////
//
// Hover handlers
//

void append_xui_tooltip(LLView* viewp, LLToolTip::Params& params)
{
    if (viewp)
    {
        if (!params.styled_message.empty())
        {
            params.styled_message.add().text("\n---------\n");
        }
        LLView::root_to_view_iterator_t end_tooltip_it = viewp->endRootToView();
        // NOTE: we skip "root" since it is assumed
        for (LLView::root_to_view_iterator_t tooltip_it = ++viewp->beginRootToView();
            tooltip_it != end_tooltip_it;
            ++tooltip_it)
        {
            LLView* viewp = *tooltip_it;

            params.styled_message.add().text(viewp->getName());

            LLPanel* panelp = dynamic_cast<LLPanel*>(viewp);
            if (panelp && !panelp->getXMLFilename().empty())
            {
                params.styled_message.add()
                    .text("(" + panelp->getXMLFilename() + ")")
                    .style.color(LLColor4(0.7f, 0.7f, 1.f, 1.f));
            }
            params.styled_message.add().text("/");
        }
    }
}

static LLTrace::BlockTimerStatHandle ftm("Update UI");

// Update UI based on stored mouse position from mouse-move
// event processing.
void LLViewerWindow::updateUI()
{
    LL_PROFILE_ZONE_SCOPED_CATEGORY_UI; //LL_RECORD_BLOCK_TIME(ftm);

    static std::string last_handle_msg;

    if (gLoggedInTime.getStarted())
    {
        const F32 DESTINATION_GUIDE_HINT_TIMEOUT = 1200.f;
        const F32 SIDE_PANEL_HINT_TIMEOUT = 300.f;
        if (gLoggedInTime.getElapsedTimeF32() > DESTINATION_GUIDE_HINT_TIMEOUT)
        {
            LLFirstUse::notUsingDestinationGuide();
        }
        if (gLoggedInTime.getElapsedTimeF32() > SIDE_PANEL_HINT_TIMEOUT)
        {
            LLFirstUse::notUsingSidePanel();
        }
    }

    LLConsole::updateClass();

    // animate layout stacks so we have up to date rect for world view
    LLLayoutStack::updateClass();

    // use full window for world view when not rendering UI
    bool world_view_uses_full_window = gAgentCamera.cameraMouselook() || !gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI);
    updateWorldViewRect(world_view_uses_full_window);

    LLView::sMouseHandlerMessage.clear();

    S32 x = mCurrentMousePoint.mX;
    S32 y = mCurrentMousePoint.mY;

    MASK    mask = gKeyboard->currentMask(true);

    if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_RAYCAST))
    {
        gDebugRaycastFaceHit = gDebugRaycastGLTFNodeHit = gDebugRaycastGLTFPrimitiveHit = -1;
        gDebugRaycastObject = cursorIntersect(-1, -1, 512.f, NULL, -1, false, false, true, false,
                                              &gDebugRaycastFaceHit,
                                              &gDebugRaycastGLTFNodeHit,
                                              &gDebugRaycastGLTFPrimitiveHit,
                                              &gDebugRaycastIntersection,
                                              &gDebugRaycastTexCoord,
                                              &gDebugRaycastNormal,
                                              &gDebugRaycastTangent,
                                              &gDebugRaycastStart,
                                              &gDebugRaycastEnd);

        gDebugRaycastParticle = gPipeline.lineSegmentIntersectParticle(gDebugRaycastStart, gDebugRaycastEnd, &gDebugRaycastParticleIntersection, NULL);
    }

    updateMouseDelta();
    updateKeyboardFocus();

    bool handled = false;

    LLUICtrl* top_ctrl = gFocusMgr.getTopCtrl();
    LLMouseHandler* mouse_captor = gFocusMgr.getMouseCapture();
    LLView* captor_view = dynamic_cast<LLView*>(mouse_captor);

    //FIXME: only include captor and captor's ancestors if mouse is truly over them --RN

    //build set of views containing mouse cursor by traversing UI hierarchy and testing
    //screen rect against mouse cursor
    view_handle_set_t mouse_hover_set;

    // constraint mouse enter events to children of mouse captor
    LLView* root_view = captor_view;

    // if mouse captor doesn't exist or isn't a LLView
    // then allow mouse enter events on entire UI hierarchy
    if (!root_view)
    {
        root_view = mRootView;
    }

    static LLCachedControl<bool> dump_menu_holder(gSavedSettings, "DumpMenuHolderSize", false);
    if (dump_menu_holder)
    {
        static bool init = false;
        static LLFrameTimer child_count_timer;
        static std::vector <std::string> child_vec;
        if (!init)
        {
            child_count_timer.resetWithExpiry(5.f);
            init = true;
        }
        if (child_count_timer.hasExpired())
        {
            LL_INFOS() << "gMenuHolder child count: " << gMenuHolder->getChildCount() << LL_ENDL;
            std::vector<std::string> local_child_vec;
            LLView::child_list_t child_list = *gMenuHolder->getChildList();
            for (auto child : child_list)
            {
                local_child_vec.emplace_back(child->getName());
            }
            if (!local_child_vec.empty() && local_child_vec != child_vec)
            {
                std::vector<std::string> out_vec;
                std::sort(local_child_vec.begin(), local_child_vec.end());
                std::sort(child_vec.begin(), child_vec.end());
                std::set_difference(child_vec.begin(), child_vec.end(), local_child_vec.begin(), local_child_vec.end(), std::inserter(out_vec, out_vec.begin()));
                if (!out_vec.empty())
                {
                    LL_INFOS() << "gMenuHolder removal diff size: '"<<out_vec.size() <<"' begin_child_diff";
                    for (auto str : out_vec)
                    {
                        LL_CONT << " : " << str;
                    }
                    LL_CONT << " : end_child_diff" << LL_ENDL;
                }

                out_vec.clear();
                std::set_difference(local_child_vec.begin(), local_child_vec.end(), child_vec.begin(), child_vec.end(), std::inserter(out_vec, out_vec.begin()));
                if (!out_vec.empty())
                {
                    LL_INFOS() << "gMenuHolder addition diff size: '" << out_vec.size() << "' begin_child_diff";
                    for (auto str : out_vec)
                    {
                        LL_CONT << " : " << str;
                    }
                    LL_CONT << " : end_child_diff" << LL_ENDL;
                }
                child_vec.swap(local_child_vec);
            }
            child_count_timer.resetWithExpiry(5.f);
        }
    }

    // only update mouse hover set when UI is visible (since we shouldn't send hover events to invisible UI
    if (gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
    {
        // include all ancestors of captor_view as automatically having mouse
        if (captor_view)
        {
            LLView* captor_parent_view = captor_view->getParent();
            while(captor_parent_view)
            {
                mouse_hover_set.insert(captor_parent_view->getHandle());
                captor_parent_view = captor_parent_view->getParent();
            }
        }

        // aggregate visible views that contain mouse cursor in display order
        LLPopupView::popup_list_t popups = mPopupView->getCurrentPopups();

        for(LLPopupView::popup_list_t::iterator popup_it = popups.begin(); popup_it != popups.end(); ++popup_it)
        {
            LLView* popup = popup_it->get();
            if (popup && popup->calcScreenBoundingRect().pointInRect(x, y))
            {
                // iterator over contents of top_ctrl, and throw into mouse_hover_set
                for (LLView::tree_iterator_t it = popup->beginTreeDFS();
                    it != popup->endTreeDFS();
                    ++it)
                {
                    LLView* viewp = *it;
                    if (viewp->getVisible()
                        && viewp->calcScreenBoundingRect().pointInRect(x, y))
                    {
                        // we have a view that contains the mouse, add it to the set
                        mouse_hover_set.insert(viewp->getHandle());
                    }
                    else
                    {
                        // skip this view and all of its children
                        it.skipDescendants();
                    }
                }
            }
        }

        // while the top_ctrl contains the mouse cursor, only it and its descendants will receive onMouseEnter events
        if (top_ctrl && top_ctrl->calcScreenBoundingRect().pointInRect(x, y))
        {
            // iterator over contents of top_ctrl, and throw into mouse_hover_set
            for (LLView::tree_iterator_t it = top_ctrl->beginTreeDFS();
                it != top_ctrl->endTreeDFS();
                ++it)
            {
                LLView* viewp = *it;
                if (viewp->getVisible()
                    && viewp->calcScreenBoundingRect().pointInRect(x, y))
                {
                    // we have a view that contains the mouse, add it to the set
                    mouse_hover_set.insert(viewp->getHandle());
                }
                else
                {
                    // skip this view and all of its children
                    it.skipDescendants();
                }
            }
        }
        else
        {
            // walk UI tree in depth-first order
            for (LLView::tree_iterator_t it = root_view->beginTreeDFS();
                it != root_view->endTreeDFS();
                ++it)
            {
                LLView* viewp = *it;
                // calculating the screen rect involves traversing the parent, so this is less than optimal
                if (viewp->getVisible()
                    && viewp->calcScreenBoundingRect().pointInRect(x, y))
                {

                    // if this view is mouse opaque, nothing behind it should be in mouse_hover_set
                    if (viewp->getMouseOpaque())
                    {
                        // constrain further iteration to children of this widget
                        it = viewp->beginTreeDFS();
                    }

                    // we have a view that contains the mouse, add it to the set
                    mouse_hover_set.insert(viewp->getHandle());
                }
                else
                {
                    // skip this view and all of its children
                    it.skipDescendants();
                }
            }
        }
    }

    typedef std::vector<LLHandle<LLView> > view_handle_list_t;

    // call onMouseEnter() on all views which contain the mouse cursor but did not before
    view_handle_list_t mouse_enter_views;
    std::set_difference(mouse_hover_set.begin(), mouse_hover_set.end(),
                        mMouseHoverViews.begin(), mMouseHoverViews.end(),
                        std::back_inserter(mouse_enter_views));
    for (view_handle_list_t::iterator it = mouse_enter_views.begin();
        it != mouse_enter_views.end();
        ++it)
    {
        LLView* viewp = it->get();
        if (viewp)
        {
            LLRect view_screen_rect = viewp->calcScreenRect();
            viewp->onMouseEnter(x - view_screen_rect.mLeft, y - view_screen_rect.mBottom, mask);
        }
    }

    // call onMouseLeave() on all views which no longer contain the mouse cursor
    view_handle_list_t mouse_leave_views;
    std::set_difference(mMouseHoverViews.begin(), mMouseHoverViews.end(),
                        mouse_hover_set.begin(), mouse_hover_set.end(),
                        std::back_inserter(mouse_leave_views));
    for (view_handle_list_t::iterator it = mouse_leave_views.begin();
        it != mouse_leave_views.end();
        ++it)
    {
        LLView* viewp = it->get();
        if (viewp)
        {
            LLRect view_screen_rect = viewp->calcScreenRect();
            viewp->onMouseLeave(x - view_screen_rect.mLeft, y - view_screen_rect.mBottom, mask);
        }
    }

    // store resulting hover set for next frame
    swap(mMouseHoverViews, mouse_hover_set);

    // only handle hover events when UI is enabled
    if (gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
    {

        if( mouse_captor )
        {
            // Pass hover events to object capturing mouse events.
            S32 local_x;
            S32 local_y;
            mouse_captor->screenPointToLocal( x, y, &local_x, &local_y );
            handled = mouse_captor->handleHover(local_x, local_y, mask);
            if (LLView::sDebugMouseHandling)
            {
                LL_INFOS() << "Hover handled by captor " << mouse_captor->getName() << LL_ENDL;
            }

            if( !handled )
            {
                LL_DEBUGS("UserInput") << "hover not handled by mouse captor" << LL_ENDL;
            }
        }
        else
        {
            if (top_ctrl)
            {
                S32 local_x, local_y;
                top_ctrl->screenPointToLocal( x, y, &local_x, &local_y );
                handled = top_ctrl->pointInView(local_x, local_y) && top_ctrl->handleHover(local_x, local_y, mask);
            }

            if ( !handled )
            {
                // x and y are from last time mouse was in window
                // mMouseInWindow tracks *actual* mouse location
                if (mMouseInWindow && mRootView->handleHover(x, y, mask) )
                {
                    if (LLView::sDebugMouseHandling && LLView::sMouseHandlerMessage != last_handle_msg)
                    {
                        last_handle_msg = LLView::sMouseHandlerMessage;
                        LL_INFOS() << "Hover" << LLView::sMouseHandlerMessage << LL_ENDL;
                    }
                    handled = true;
                }
                else if (LLView::sDebugMouseHandling)
                {
                    if (last_handle_msg != LLStringUtil::null)
                    {
                        last_handle_msg.clear();
                        LL_INFOS() << "Hover not handled by view" << LL_ENDL;
                    }
                }
            }

            if (!handled)
            {
                LLTool *tool = LLToolMgr::getInstance()->getCurrentTool();

                if(mMouseInWindow && tool)
                {
                    handled = tool->handleHover(x, y, mask);
                }
            }
        }

        // Show a new tool tip (or update one that is already shown)
        bool tool_tip_handled = false;
        std::string tool_tip_msg;
        if( handled
            && !mWindow->isCursorHidden())
        {
            LLRect screen_sticky_rect = mRootView->getLocalRect();
            S32 local_x, local_y;

            static LLCachedControl<bool> debug_show_xui_names(gSavedSettings, "DebugShowXUINames", 0);
            if (debug_show_xui_names)
            {
                LLToolTip::Params params;

                LLView* tooltip_view = mRootView;
                LLView::tree_iterator_t end_it = mRootView->endTreeDFS();
                for (LLView::tree_iterator_t it = mRootView->beginTreeDFS(); it != end_it; ++it)
                {
                    LLView* viewp = *it;
                    LLRect screen_rect;
                    viewp->localRectToScreen(viewp->getLocalRect(), &screen_rect);
                    if (!(viewp->getVisible()
                         && screen_rect.pointInRect(x, y)))
                    {
                        it.skipDescendants();
                    }
                    // only report xui names for LLUICtrls,
                    // and blacklist the various containers we don't care about
                    else if (dynamic_cast<LLUICtrl*>(viewp)
                            && viewp != gMenuHolder
                            && viewp != gFloaterView
                            && viewp != gConsole)
                    {
                        if (dynamic_cast<LLFloater*>(viewp))
                        {
                            // constrain search to descendants of this (frontmost) floater
                            // by resetting iterator
                            it = viewp->beginTreeDFS();
                        }

                        // if we are in a new part of the tree (not a descendent of current tooltip_view)
                        // then push the results for tooltip_view and start with a new potential view
                        // NOTE: this emulates visiting only the leaf nodes that meet our criteria
                        if (!viewp->hasAncestor(tooltip_view))
                        {
                            append_xui_tooltip(tooltip_view, params);
                            screen_sticky_rect.intersectWith(tooltip_view->calcScreenRect());
                        }
                        tooltip_view = viewp;
                    }
                }

                append_xui_tooltip(tooltip_view, params);
                params.styled_message.add().text("\n");

                screen_sticky_rect.intersectWith(tooltip_view->calcScreenRect());

                params.sticky_rect = screen_sticky_rect;
                params.max_width = 400;

                LLToolTipMgr::instance().show(params);
            }
            // if there is a mouse captor, nothing else gets a tooltip
            else if (mouse_captor)
            {
                mouse_captor->screenPointToLocal(x, y, &local_x, &local_y);
                tool_tip_handled = mouse_captor->handleToolTip(local_x, local_y, mask);
            }
            else
            {
                // next is top_ctrl
                if (!tool_tip_handled && top_ctrl)
                {
                    top_ctrl->screenPointToLocal(x, y, &local_x, &local_y);
                    tool_tip_handled = top_ctrl->handleToolTip(local_x, local_y, mask );
                }

                if (!tool_tip_handled)
                {
                    local_x = x; local_y = y;
                    tool_tip_handled = mRootView->handleToolTip(local_x, local_y, mask );
                }

                LLTool* current_tool = LLToolMgr::getInstance()->getCurrentTool();
                if (!tool_tip_handled && current_tool)
                {
                    current_tool->screenPointToLocal(x, y, &local_x, &local_y);
                    tool_tip_handled = current_tool->handleToolTip(local_x, local_y, mask );
                }
            }
        }
    }
    else
    {   // just have tools handle hover when UI is turned off
        LLTool *tool = LLToolMgr::getInstance()->getCurrentTool();

        if(mMouseInWindow && tool)
        {
            handled = tool->handleHover(x, y, mask);
        }
    }

    updateLayout();

    mLastMousePoint = mCurrentMousePoint;

    // cleanup unused selections when no modal dialogs are open
    if (LLModalDialog::activeCount() == 0)
    {
        LLViewerParcelMgr::getInstance()->deselectUnused();
    }

    if (LLModalDialog::activeCount() == 0)
    {
        LLSelectMgr::getInstance()->deselectUnused();
    }
}


void LLViewerWindow::updateLayout()
{
    LLTool* tool = LLToolMgr::getInstance()->getCurrentTool();
    if (gFloaterTools != NULL
        && tool != NULL
        && tool != gToolNull
        && tool != LLToolCompInspect::getInstance()
        && tool != LLToolDragAndDrop::getInstance()
        && !gSavedSettings.getBOOL("FreezeTime"))
    {
        // Suppress the toolbox view if our source tool was the pie tool,
        // and we've overridden to something else.
        bool suppress_toolbox =
            (LLToolMgr::getInstance()->getBaseTool() == LLToolPie::getInstance()) &&
            (LLToolMgr::getInstance()->getCurrentTool() != LLToolPie::getInstance());

        LLMouseHandler *captor = gFocusMgr.getMouseCapture();
        // With the null, inspect, or drag and drop tool, don't muck
        // with visibility.

        if (gFloaterTools->isMinimized()
            ||  (tool != LLToolPie::getInstance()                       // not default tool
                && tool != LLToolCompGun::getInstance()                 // not coming out of mouselook
                && !suppress_toolbox                                    // not override in third person
                && LLToolMgr::getInstance()->getCurrentToolset()->isShowFloaterTools()
                && (!captor || dynamic_cast<LLView*>(captor) != NULL)))                     // not dragging
        {
            // Force floater tools to be visible (unless minimized)
            if (!gFloaterTools->getVisible())
            {
                gFloaterTools->openFloater();
            }
            // Update the location of the blue box tool popup
            LLCoordGL select_center_screen;
            MASK    mask = gKeyboard->currentMask(true);
            gFloaterTools->updatePopup( select_center_screen, mask );
        }
        else
        {
            gFloaterTools->setVisible(false);
        }
        //gMenuBarView->setItemVisible("BuildTools", gFloaterTools->getVisible());
    }

    // Always update console
    if(gConsole)
    {
        LLRect console_rect = getChatConsoleRect();
        gConsole->reshape(console_rect.getWidth(), console_rect.getHeight());
        gConsole->setRect(console_rect);
    }
}

void LLViewerWindow::updateMouseDelta()
{
#if LL_WINDOWS
    LLCoordCommon delta;
    mWindow->getCursorDelta(&delta);
    S32 dx = delta.mX;
    S32 dy = delta.mY;
#else
    S32 dx = lltrunc((F32) (mCurrentMousePoint.mX - mLastMousePoint.mX) * LLUI::getScaleFactor().mV[VX]);
    S32 dy = lltrunc((F32) (mCurrentMousePoint.mY - mLastMousePoint.mY) * LLUI::getScaleFactor().mV[VY]);
#endif

    //RN: fix for asynchronous notification of mouse leaving window not working
    LLCoordWindow mouse_pos;
    mWindow->getCursorPosition(&mouse_pos);
    if (mouse_pos.mX < 0 ||
        mouse_pos.mY < 0 ||
        mouse_pos.mX > mWindowRectRaw.getWidth() ||
        mouse_pos.mY > mWindowRectRaw.getHeight())
    {
        mMouseInWindow = false;
    }
    else
    {
        mMouseInWindow = true;
    }

    LLVector2 mouse_vel;

    if (gSavedSettings.getBOOL("MouseSmooth"))
    {
        static F32 fdx = 0.f;
        static F32 fdy = 0.f;

        F32 amount = 16.f;
        fdx = fdx + ((F32) dx - fdx) * llmin(gFrameIntervalSeconds.value()*amount,1.f);
        fdy = fdy + ((F32) dy - fdy) * llmin(gFrameIntervalSeconds.value()*amount,1.f);

        mCurrentMouseDelta.set(ll_round(fdx), ll_round(fdy));
        mouse_vel.setVec(fdx,fdy);
    }
    else
    {
        mCurrentMouseDelta.set(dx, dy);
        mouse_vel.setVec((F32) dx, (F32) dy);
    }

    sample(sMouseVelocityStat, mouse_vel.magVec());
}

void LLViewerWindow::updateKeyboardFocus()
{
    if (!gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
    {
        gFocusMgr.setKeyboardFocus(NULL);
    }

    // clean up current focus
    LLUICtrl* cur_focus = dynamic_cast<LLUICtrl*>(gFocusMgr.getKeyboardFocus());
    if (cur_focus)
    {
        bool is_in_visible_chain = cur_focus->isInVisibleChain();
        bool is_in_enabled_chain = cur_focus->isInEnabledChain();
        if (!is_in_visible_chain || !is_in_enabled_chain)
        {
            // don't release focus, just reassign so that if being given
            // to a sibling won't call onFocusLost on all the ancestors
            // gFocusMgr.releaseFocusIfNeeded(cur_focus);

            LLUICtrl* parent = cur_focus->getParentUICtrl();
            const LLUICtrl* focus_root = cur_focus->findRootMostFocusRoot();
            bool new_focus_found = false;
            while(parent)
            {
                if (!is_in_visible_chain)
                {
                    is_in_visible_chain = parent->isInVisibleChain();
                }
                if (!is_in_enabled_chain)
                {
                    is_in_enabled_chain = parent->isInEnabledChain();
                }
                if (parent->isCtrl()
                    && (parent->hasTabStop() || parent == focus_root)
                    && !parent->getIsChrome()
                    && is_in_visible_chain
                    && is_in_enabled_chain)
                {
                    if (!parent->focusFirstItem())
                    {
                        parent->setFocus(true);
                    }
                    new_focus_found = true;
                    break;
                }
                parent = parent->getParentUICtrl();
            }

            // if we didn't find a better place to put focus, just release it
            // hasFocus() will return true if and only if we didn't touch focus since we
            // are only moving focus higher in the hierarchy
            if (!new_focus_found)
            {
                cur_focus->setFocus(false);
            }
        }
        else if (cur_focus->isFocusRoot())
        {
            // focus roots keep trying to delegate focus to their first valid descendant
            // this assumes that focus roots are not valid focus holders on their own
            cur_focus->focusFirstItem();
        }
    }

    // last ditch force of edit menu to selection manager
    if (LLEditMenuHandler::gEditMenuHandler == NULL && LLSelectMgr::getInstance()->getSelection()->getObjectCount())
    {
        LLEditMenuHandler::gEditMenuHandler = LLSelectMgr::getInstance();
    }

    if (gFloaterView->getCycleMode())
    {
        // sync all floaters with their focus state
        gFloaterView->highlightFocusedFloater();
        gSnapshotFloaterView->highlightFocusedFloater();
        MASK    mask = gKeyboard->currentMask(true);
        if ((mask & MASK_CONTROL) == 0)
        {
            // control key no longer held down, finish cycle mode
            gFloaterView->setCycleMode(false);

            gFloaterView->syncFloaterTabOrder();
        }
        else
        {
            // user holding down CTRL, don't update tab order of floaters
        }
    }
    else
    {
        // update focused floater
        gFloaterView->highlightFocusedFloater();
        gSnapshotFloaterView->highlightFocusedFloater();
        // make sure floater visible order is in sync with tab order
        gFloaterView->syncFloaterTabOrder();
    }
}

static LLTrace::BlockTimerStatHandle FTM_UPDATE_WORLD_VIEW("Update World View");
void LLViewerWindow::updateWorldViewRect(bool use_full_window)
{
    LL_RECORD_BLOCK_TIME(FTM_UPDATE_WORLD_VIEW);

    // start off using whole window to render world
    LLRect new_world_rect = mWindowRectRaw;

    if (!use_full_window && mWorldViewPlaceholder.get())
    {
        new_world_rect = mWorldViewPlaceholder.get()->calcScreenRect();
        // clamp to at least a 1x1 rect so we don't try to allocate zero width gl buffers
        new_world_rect.mTop = llmax(new_world_rect.mTop, new_world_rect.mBottom + 1);
        new_world_rect.mRight = llmax(new_world_rect.mRight, new_world_rect.mLeft + 1);

        new_world_rect.mLeft = ll_round((F32)new_world_rect.mLeft * mDisplayScale.mV[VX]);
        new_world_rect.mRight = ll_round((F32)new_world_rect.mRight * mDisplayScale.mV[VX]);
        new_world_rect.mBottom = ll_round((F32)new_world_rect.mBottom * mDisplayScale.mV[VY]);
        new_world_rect.mTop = ll_round((F32)new_world_rect.mTop * mDisplayScale.mV[VY]);
    }

    if (mWorldViewRectRaw != new_world_rect)
    {
        mWorldViewRectRaw = new_world_rect;
        gResizeScreenTexture = true;
        LLViewerCamera::getInstance()->setViewHeightInPixels( mWorldViewRectRaw.getHeight() );
        LLViewerCamera::getInstance()->setAspect( getWorldViewAspectRatio() );

        LLRect old_world_rect_scaled = mWorldViewRectScaled;
        mWorldViewRectScaled = calcScaledRect(mWorldViewRectRaw, mDisplayScale);

        // sending a signal with a new WorldView rect
        mOnWorldViewRectUpdated(old_world_rect_scaled, mWorldViewRectScaled);
    }
}

void LLViewerWindow::saveLastMouse(const LLCoordGL &point)
{
    // Store last mouse location.
    // If mouse leaves window, pretend last point was on edge of window

    if (point.mX < 0)
    {
        mCurrentMousePoint.mX = 0;
    }
    else if (point.mX > getWindowWidthScaled())
    {
        mCurrentMousePoint.mX = getWindowWidthScaled();
    }
    else
    {
        mCurrentMousePoint.mX = point.mX;
    }

    if (point.mY < 0)
    {
        mCurrentMousePoint.mY = 0;
    }
    else if (point.mY > getWindowHeightScaled() )
    {
        mCurrentMousePoint.mY = getWindowHeightScaled();
    }
    else
    {
        mCurrentMousePoint.mY = point.mY;
    }
}


// Draws the selection outlines for the currently selected objects
// Must be called after displayObjects is called, which sets the mGLName parameter
// NOTE: This function gets called 3 times:
//  render_ui_3d:           false, false, true
//  render_hud_elements:    false, false, false
void LLViewerWindow::renderSelections( bool for_gl_pick, bool pick_parcel_walls, bool for_hud )
{
    LLObjectSelectionHandle selection = LLSelectMgr::getInstance()->getSelection();

    if (!for_hud && !for_gl_pick)
    {
        // Call this once and only once
        LLSelectMgr::getInstance()->updateSilhouettes();
    }

    // Draw fence around land selections
    if (for_gl_pick)
    {
        if (pick_parcel_walls)
        {
            LLViewerParcelMgr::getInstance()->renderParcelCollision();
        }
    }
    else if (( for_hud && selection->getSelectType() == SELECT_TYPE_HUD) ||
             (!for_hud && selection->getSelectType() != SELECT_TYPE_HUD))
    {
        LLSelectMgr::getInstance()->renderSilhouettes(for_hud);

        stop_glerror();

        // setup HUD render
        if (selection->getSelectType() == SELECT_TYPE_HUD && LLSelectMgr::getInstance()->getSelection()->getObjectCount())
        {
            LLBBox hud_bbox = gAgentAvatarp->getHUDBBox();

            // set up transform to encompass bounding box of HUD
            gGL.matrixMode(LLRender::MM_PROJECTION);
            gGL.pushMatrix();
            gGL.loadIdentity();
            F32 depth = llmax(1.f, hud_bbox.getExtentLocal().mV[VX] * 1.1f);
            gGL.ortho(-0.5f * LLViewerCamera::getInstance()->getAspect(), 0.5f * LLViewerCamera::getInstance()->getAspect(), -0.5f, 0.5f, 0.f, depth);

            gGL.matrixMode(LLRender::MM_MODELVIEW);
            gGL.pushMatrix();
            gGL.loadIdentity();
            gGL.loadMatrix(OGL_TO_CFR_ROTATION);        // Load Cory's favorite reference frame
            gGL.translatef(-hud_bbox.getCenterLocal().mV[VX] + (depth *0.5f), 0.f, 0.f);
        }

        // Render light for editing
        if (LLSelectMgr::sRenderLightRadius && LLToolMgr::getInstance()->inEdit())
        {
            gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
            LLGLEnable gls_blend(GL_BLEND);
            LLGLEnable gls_cull(GL_CULL_FACE);
            LLGLDepthTest gls_depth(GL_TRUE, GL_FALSE);
            gGL.matrixMode(LLRender::MM_MODELVIEW);
            gGL.pushMatrix();
            if (selection->getSelectType() == SELECT_TYPE_HUD)
            {
                F32 zoom = gAgentCamera.mHUDCurZoom;
                gGL.scalef(zoom, zoom, zoom);
            }

            struct f : public LLSelectedObjectFunctor
            {
                virtual bool apply(LLViewerObject* object)
                {
                    LLDrawable* drawable = object->mDrawable;
                    if (drawable && drawable->isLight())
                    {
                        LLVOVolume* vovolume = drawable->getVOVolume();
                        gGL.pushMatrix();

                        LLVector3 center = drawable->getPositionAgent();
                        gGL.translatef(center[0], center[1], center[2]);
                        F32 scale = vovolume->getLightRadius();
                        gGL.scalef(scale, scale, scale);

                        LLColor4 color(vovolume->getLightSRGBColor(), .5f);
                        gGL.color4fv(color.mV);

                        //F32 pixel_area = 100000.f;
                        // Render Outside
                        gSphere.render();

                        // Render Inside
                        glCullFace(GL_FRONT);
                        gSphere.render();
                        glCullFace(GL_BACK);

                        gGL.popMatrix();
                    }
                    return true;
                }
            } func;
            LLSelectMgr::getInstance()->getSelection()->applyToObjects(&func);

            gGL.popMatrix();
        }

        // NOTE: The average position for the axis arrows of the selected objects should
        // not be recalculated at this time.  If they are, then group rotations will break.

        // Draw arrows at average center of all selected objects
        LLTool* tool = LLToolMgr::getInstance()->getCurrentTool();
        if (tool)
        {
            if(tool->isAlwaysRendered())
            {
                tool->render();
            }
            else
            {
                if( !LLSelectMgr::getInstance()->getSelection()->isEmpty() )
                {
                    bool all_selected_objects_move;
                    bool all_selected_objects_modify;
                    // Note: This might be costly to do on each frame and when a lot of objects are selected
                    // we might be better off with some kind of memory for selection and/or states, consider
                    // optimizing, perhaps even some kind of selection generation at level of LLSelectMgr to
                    // make whole viewer benefit.
                    LLSelectMgr::getInstance()->selectGetEditMoveLinksetPermissions(all_selected_objects_move, all_selected_objects_modify);

                    bool draw_handles = true;

                    if (tool == LLToolCompTranslate::getInstance() && !all_selected_objects_move && !LLSelectMgr::getInstance()->isMovableAvatarSelected())
                    {
                        draw_handles = false;
                    }

                    if (tool == LLToolCompRotate::getInstance() && !all_selected_objects_move && !LLSelectMgr::getInstance()->isMovableAvatarSelected())
                    {
                        draw_handles = false;
                    }

                    if ( !all_selected_objects_modify && tool == LLToolCompScale::getInstance() )
                    {
                        draw_handles = false;
                    }

                    if( draw_handles )
                    {
                        tool->render();
                    }
                }
            }
        }

        // un-setup HUD render
        if (selection->getSelectType() == SELECT_TYPE_HUD && selection->getObjectCount())
        {
            gGL.matrixMode(LLRender::MM_PROJECTION);
            gGL.popMatrix();

            gGL.matrixMode(LLRender::MM_MODELVIEW);
            gGL.popMatrix();
            stop_glerror();
        }
    }
}

// Return a point near the clicked object representative of the place the object was clicked.
LLVector3d LLViewerWindow::clickPointInWorldGlobal(S32 x, S32 y_from_bot, LLViewerObject* clicked_object) const
{
    // create a normalized vector pointing from the camera center into the
    // world at the location of the mouse click
    LLVector3 mouse_direction_global = mouseDirectionGlobal( x, y_from_bot );

    LLVector3d relative_object = clicked_object->getPositionGlobal() - gAgentCamera.getCameraPositionGlobal();

    // make mouse vector as long as object vector, so it touchs a point near
    // where the user clicked on the object
    mouse_direction_global *= (F32) relative_object.magVec();

    LLVector3d new_pos;
    new_pos.setVec(mouse_direction_global);
    // transform mouse vector back to world coords
    new_pos += gAgentCamera.getCameraPositionGlobal();

    return new_pos;
}


bool LLViewerWindow::clickPointOnSurfaceGlobal(const S32 x, const S32 y, LLViewerObject *objectp, LLVector3d &point_global) const
{
    bool intersect = false;

//  U8 shape = objectp->mPrimitiveCode & LL_PCODE_BASE_MASK;
    if (!intersect)
    {
        point_global = clickPointInWorldGlobal(x, y, objectp);
        LL_INFOS() << "approx intersection at " <<  (objectp->getPositionGlobal() - point_global) << LL_ENDL;
    }
    else
    {
        LL_INFOS() << "good intersection at " <<  (objectp->getPositionGlobal() - point_global) << LL_ENDL;
    }

    return intersect;
}

void LLViewerWindow::pickAsync( S32 x,
                                S32 y_from_bot,
                                MASK mask,
                                void (*callback)(const LLPickInfo& info),
                                bool pick_transparent,
                                bool pick_rigged,
                                bool pick_unselectable,
                                bool pick_reflection_probes)
{
    // "Show Debug Alpha" means no object actually transparent
    bool in_build_mode = LLFloaterReg::instanceVisible("build");
    if (LLDrawPoolAlpha::sShowDebugAlpha
        || (in_build_mode && gSavedSettings.getBOOL("SelectInvisibleObjects")))
    {
        pick_transparent = true;
    }

    LLPickInfo pick_info(LLCoordGL(x, y_from_bot), mask, pick_transparent, pick_rigged, false, pick_reflection_probes, pick_unselectable, true, callback);
    schedulePick(pick_info);
}

void LLViewerWindow::schedulePick(LLPickInfo& pick_info)
{
    if (mPicks.size() >= 1024 || mWindow->getMinimized())
    { //something went wrong, picks are being scheduled but not processed

        if (pick_info.mPickCallback)
        {
            pick_info.mPickCallback(pick_info);
        }

        return;
    }
    mPicks.push_back(pick_info);

    // delay further event processing until we receive results of pick
    // only do this for async picks so that handleMouseUp won't be called
    // until the pick triggered in handleMouseDown has been processed, for example
    mWindow->delayInputProcessing();
}


void LLViewerWindow::performPick()
{
    if (!mPicks.empty())
    {
        std::vector<LLPickInfo>::iterator pick_it;
        for (pick_it = mPicks.begin(); pick_it != mPicks.end(); ++pick_it)
        {
            pick_it->fetchResults();
        }

        mLastPick = mPicks.back();
        mPicks.clear();
    }
}

void LLViewerWindow::returnEmptyPicks()
{
    std::vector<LLPickInfo>::iterator pick_it;
    for (pick_it = mPicks.begin(); pick_it != mPicks.end(); ++pick_it)
    {
        mLastPick = *pick_it;
        // just trigger callback with empty results
        if (pick_it->mPickCallback)
        {
            pick_it->mPickCallback(*pick_it);
        }
    }
    mPicks.clear();
}

// Performs the GL object/land pick.
LLPickInfo LLViewerWindow::pickImmediate(S32 x, S32 y_from_bot, bool pick_transparent, bool pick_rigged, bool pick_particle, bool pick_unselectable, bool pick_reflection_probe)
{
    bool in_build_mode = LLFloaterReg::instanceVisible("build");
    if ((in_build_mode && gSavedSettings.getBOOL("SelectInvisibleObjects")) || LLDrawPoolAlpha::sShowDebugAlpha)
    {
        // build mode allows interaction with all transparent objects
        // "Show Debug Alpha" means no object actually transparent
        pick_transparent = true;
    }

    // shortcut queueing in mPicks and just update mLastPick in place
    MASK    key_mask = gKeyboard->currentMask(true);
    mLastPick = LLPickInfo(LLCoordGL(x, y_from_bot), key_mask, pick_transparent, pick_rigged, pick_particle, pick_reflection_probe, true, false, NULL);
    mLastPick.fetchResults();

    return mLastPick;
}

LLHUDIcon* LLViewerWindow::cursorIntersectIcon(S32 mouse_x, S32 mouse_y, F32 depth,
                                           LLVector4a* intersection)
{
    S32 x = mouse_x;
    S32 y = mouse_y;

    if ((mouse_x == -1) && (mouse_y == -1)) // use current mouse position
    {
        x = getCurrentMouseX();
        y = getCurrentMouseY();
    }

    // world coordinates of mouse
    // VECTORIZE THIS
    LLVector3 mouse_direction_global = mouseDirectionGlobal(x,y);
    LLVector3 mouse_point_global = LLViewerCamera::getInstance()->getOrigin();
    LLVector3 mouse_world_start = mouse_point_global;
    LLVector3 mouse_world_end   = mouse_point_global + mouse_direction_global * depth;

    LLVector4a start, end;
    start.load3(mouse_world_start.mV);
    end.load3(mouse_world_end.mV);

    return LLHUDIcon::lineSegmentIntersectAll(start, end, intersection);
}

LLViewerObject* LLViewerWindow::cursorIntersect(S32 mouse_x, S32 mouse_y, F32 depth,
                                                LLViewerObject *this_object,
                                                S32 this_face,
                                                bool pick_transparent,
                                                bool pick_rigged,
                                                bool pick_unselectable,
                                                bool pick_reflection_probe,
                                                S32* face_hit,
                                                S32* gltf_node_hit,
                                                S32* gltf_primitive_hit,
                                                LLVector4a *intersection,
                                                LLVector2 *uv,
                                                LLVector4a *normal,
                                                LLVector4a *tangent,
                                                LLVector4a* start,
                                                LLVector4a* end)
{
    S32 x = mouse_x;
    S32 y = mouse_y;

    if ((mouse_x == -1) && (mouse_y == -1)) // use current mouse position
    {
        x = getCurrentMouseX();
        y = getCurrentMouseY();
    }

    // HUD coordinates of mouse
    LLVector3 mouse_point_hud = mousePointHUD(x, y);
    LLVector3 mouse_hud_start = mouse_point_hud - LLVector3(depth, 0, 0);
    LLVector3 mouse_hud_end   = mouse_point_hud + LLVector3(depth, 0, 0);

    // world coordinates of mouse
    LLVector3 mouse_direction_global = mouseDirectionGlobal(x,y);
    LLVector3 mouse_point_global = LLViewerCamera::getInstance()->getOrigin();

    //get near clip plane
    LLVector3 n = LLViewerCamera::getInstance()->getAtAxis();
    LLVector3 p = mouse_point_global + n * LLViewerCamera::getInstance()->getNear();

    //project mouse point onto plane
    LLVector3 pos;
    line_plane(mouse_point_global, mouse_direction_global, p, n, pos);
    mouse_point_global = pos;

    LLVector3 mouse_world_start = mouse_point_global;
    LLVector3 mouse_world_end   = mouse_point_global + mouse_direction_global * depth;

    if (!LLViewerJoystick::getInstance()->getOverrideCamera())
    { //always set raycast intersection to mouse_world_end unless
        //flycam is on (for DoF effect)
        gDebugRaycastIntersection.load3(mouse_world_end.mV);
    }

    LLVector4a mw_start;
    mw_start.load3(mouse_world_start.mV);
    LLVector4a mw_end;
    mw_end.load3(mouse_world_end.mV);

    LLVector4a mh_start;
    mh_start.load3(mouse_hud_start.mV);
    LLVector4a mh_end;
    mh_end.load3(mouse_hud_end.mV);

    if (start)
    {
        *start = mw_start;
    }

    if (end)
    {
        *end = mw_end;
    }

    LLViewerObject* found = NULL;

    if (this_object)  // check only this object
    {
        if (this_object->isHUDAttachment()) // is a HUD object?
        {
            if (this_object->lineSegmentIntersect(mh_start, mh_end, this_face, pick_transparent, pick_rigged, pick_unselectable,
                                                  face_hit, intersection, uv, normal, tangent))
            {
                found = this_object;
            }
        }
        else // is a world object
        {
            if ((pick_reflection_probe || !this_object->isReflectionProbe())
                && this_object->lineSegmentIntersect(mw_start, mw_end, this_face, pick_transparent, pick_rigged, pick_unselectable,
                                                  face_hit, intersection, uv, normal, tangent))
            {
                found = this_object;
            }
        }
    }
    else // check ALL objects
    {
        found = gPipeline.lineSegmentIntersectInHUD(mh_start, mh_end, pick_transparent,
                                                    face_hit, intersection, uv, normal, tangent);

        if (!found) // if not found in HUD, look in world:
        {
            found = gPipeline.lineSegmentIntersectInWorld(mw_start, mw_end, pick_transparent, pick_rigged, pick_unselectable, pick_reflection_probe,
                                                          face_hit, gltf_node_hit, gltf_primitive_hit, intersection, uv, normal, tangent);
            if (found && !pick_transparent)
            {
                gDebugRaycastIntersection = *intersection;
            }
        }
    }

    return found;
}

// Returns unit vector relative to camera
// indicating direction of point on screen x,y
LLVector3 LLViewerWindow::mouseDirectionGlobal(const S32 x, const S32 y) const
{
    // find vertical field of view
    F32         fov = LLViewerCamera::getInstance()->getView();

    // find world view center in scaled ui coordinates
    F32         center_x = (F32)getWorldViewRectScaled().getCenterX();
    F32         center_y = (F32)getWorldViewRectScaled().getCenterY();

    // calculate pixel distance to screen
    F32         distance = ((F32)getWorldViewHeightScaled() * 0.5f) / (tan(fov / 2.f));

    // calculate click point relative to middle of screen
    F32         click_x = x - center_x;
    F32         click_y = y - center_y;

    // compute mouse vector
    LLVector3   mouse_vector =  distance * LLViewerCamera::getInstance()->getAtAxis()
                                - click_x * LLViewerCamera::getInstance()->getLeftAxis()
                                + click_y * LLViewerCamera::getInstance()->getUpAxis();

    mouse_vector.normVec();

    return mouse_vector;
}

LLVector3 LLViewerWindow::mousePointHUD(const S32 x, const S32 y) const
{
    // find screen resolution
    S32         height = getWorldViewHeightScaled();

    // find world view center
    F32         center_x = (F32)getWorldViewRectScaled().getCenterX();
    F32         center_y = (F32)getWorldViewRectScaled().getCenterY();

    // remap with uniform scale (1/height) so that top is -0.5, bottom is +0.5
    F32 hud_x = -((F32)x - center_x)  / height;
    F32 hud_y = ((F32)y - center_y) / height;

    return LLVector3(0.f, hud_x/gAgentCamera.mHUDCurZoom, hud_y/gAgentCamera.mHUDCurZoom);
}

// Returns unit vector relative to camera in camera space
// indicating direction of point on screen x,y
LLVector3 LLViewerWindow::mouseDirectionCamera(const S32 x, const S32 y) const
{
    // find vertical field of view
    F32         fov_height = LLViewerCamera::getInstance()->getView();
    F32         fov_width = fov_height * LLViewerCamera::getInstance()->getAspect();

    // find screen resolution
    S32         height = getWorldViewHeightScaled();
    S32         width = getWorldViewWidthScaled();

    // find world view center
    F32         center_x = (F32)getWorldViewRectScaled().getCenterX();
    F32         center_y = (F32)getWorldViewRectScaled().getCenterY();

    // calculate click point relative to middle of screen
    F32         click_x = (((F32)x - center_x) / (F32)width) * fov_width * -1.f;
    F32         click_y = (((F32)y - center_y) / (F32)height) * fov_height;

    // compute mouse vector
    LLVector3   mouse_vector =  LLVector3(0.f, 0.f, -1.f);
    LLQuaternion mouse_rotate;
    mouse_rotate.setQuat(click_y, click_x, 0.f);

    mouse_vector = mouse_vector * mouse_rotate;
    // project to z = -1 plane;
    mouse_vector = mouse_vector * (-1.f / mouse_vector.mV[VZ]);

    return mouse_vector;
}



bool LLViewerWindow::mousePointOnPlaneGlobal(LLVector3d& point, const S32 x, const S32 y,
                                        const LLVector3d &plane_point_global,
                                        const LLVector3 &plane_normal_global)
{
    LLVector3d  mouse_direction_global_d;

    mouse_direction_global_d.setVec(mouseDirectionGlobal(x,y));
    LLVector3d  plane_normal_global_d;
    plane_normal_global_d.setVec(plane_normal_global);
    F64 plane_mouse_dot = (plane_normal_global_d * mouse_direction_global_d);
    LLVector3d plane_origin_camera_rel = plane_point_global - gAgentCamera.getCameraPositionGlobal();
    F64 mouse_look_at_scale = (plane_normal_global_d * plane_origin_camera_rel)
                                / plane_mouse_dot;
    if (llabs(plane_mouse_dot) < 0.00001)
    {
        // if mouse is parallel to plane, return closest point on line through plane origin
        // that is parallel to camera plane by scaling mouse direction vector
        // by distance to plane origin, modulated by deviation of mouse direction from plane origin
        LLVector3d plane_origin_dir = plane_origin_camera_rel;
        plane_origin_dir.normVec();

        mouse_look_at_scale = plane_origin_camera_rel.magVec() / (plane_origin_dir * mouse_direction_global_d);
    }

    point = gAgentCamera.getCameraPositionGlobal() + mouse_look_at_scale * mouse_direction_global_d;

    return mouse_look_at_scale > 0.0;
}


// Returns global position
bool LLViewerWindow::mousePointOnLandGlobal(const S32 x, const S32 y, LLVector3d *land_position_global, bool ignore_distance)
{
    LLVector3       mouse_direction_global = mouseDirectionGlobal(x,y);
    F32             mouse_dir_scale;
    bool            hit_land = false;
    LLViewerRegion  *regionp;
    F32         land_z;
    const F32   FIRST_PASS_STEP = 1.0f;     // meters
    const F32   SECOND_PASS_STEP = 0.1f;    // meters
    const F32   draw_distance = ignore_distance ? MAX_FAR_CLIP : gAgentCamera.mDrawDistance;
    LLVector3d  camera_pos_global;

    camera_pos_global = gAgentCamera.getCameraPositionGlobal();
    LLVector3d      probe_point_global;
    LLVector3       probe_point_region;

    // walk forwards to find the point
    for (mouse_dir_scale = FIRST_PASS_STEP; mouse_dir_scale < draw_distance; mouse_dir_scale += FIRST_PASS_STEP)
    {
        LLVector3d mouse_direction_global_d;
        mouse_direction_global_d.setVec(mouse_direction_global * mouse_dir_scale);
        probe_point_global = camera_pos_global + mouse_direction_global_d;

        regionp = LLWorld::getInstance()->resolveRegionGlobal(probe_point_region, probe_point_global);

        if (!regionp)
        {
            // ...we're outside the world somehow
            continue;
        }

        S32 i = (S32) (probe_point_region.mV[VX]/regionp->getLand().getMetersPerGrid());
        S32 j = (S32) (probe_point_region.mV[VY]/regionp->getLand().getMetersPerGrid());
        S32 grids_per_edge = (S32) regionp->getLand().mGridsPerEdge;
        if ((i >= grids_per_edge) || (j >= grids_per_edge))
        {
            //LL_INFOS() << "LLViewerWindow::mousePointOnLand probe_point is out of region" << LL_ENDL;
            continue;
        }

        land_z = regionp->getLand().resolveHeightRegion(probe_point_region);

        //LL_INFOS() << "mousePointOnLand initial z " << land_z << LL_ENDL;

        if (probe_point_region.mV[VZ] < land_z)
        {
            // ...just went under land

            // cout << "under land at " << probe_point << " scale " << mouse_vec_scale << endl;

            hit_land = true;
            break;
        }
    }


    if (hit_land)
    {
        // Don't go more than one step beyond where we stopped above.
        // This can't just be "mouse_vec_scale" because floating point error
        // will stop the loop before the last increment.... X - 1.0 + 0.1 + 0.1 + ... + 0.1 != X
        F32 stop_mouse_dir_scale = mouse_dir_scale + FIRST_PASS_STEP;

        // take a step backwards, then walk forwards again to refine position
        for ( mouse_dir_scale -= FIRST_PASS_STEP; mouse_dir_scale <= stop_mouse_dir_scale; mouse_dir_scale += SECOND_PASS_STEP)
        {
            LLVector3d mouse_direction_global_d;
            mouse_direction_global_d.setVec(mouse_direction_global * mouse_dir_scale);
            probe_point_global = camera_pos_global + mouse_direction_global_d;

            regionp = LLWorld::getInstance()->resolveRegionGlobal(probe_point_region, probe_point_global);

            if (!regionp)
            {
                // ...we're outside the world somehow
                continue;
            }

            /*
            i = (S32) (local_probe_point.mV[VX]/regionp->getLand().getMetersPerGrid());
            j = (S32) (local_probe_point.mV[VY]/regionp->getLand().getMetersPerGrid());
            if ((i >= regionp->getLand().mGridsPerEdge) || (j >= regionp->getLand().mGridsPerEdge))
            {
                // LL_INFOS() << "LLViewerWindow::mousePointOnLand probe_point is out of region" << LL_ENDL;
                continue;
            }
            land_z = regionp->getLand().mSurfaceZ[ i + j * (regionp->getLand().mGridsPerEdge) ];
            */

            land_z = regionp->getLand().resolveHeightRegion(probe_point_region);

            //LL_INFOS() << "mousePointOnLand refine z " << land_z << LL_ENDL;

            if (probe_point_region.mV[VZ] < land_z)
            {
                // ...just went under land again

                *land_position_global = probe_point_global;
                return true;
            }
        }
    }

    return false;
}

// Saves an image to the harddrive as "SnapshotX" where X >= 1.
void LLViewerWindow::saveImageNumbered(LLImageFormatted *image, bool force_picker, const snapshot_saved_signal_t::slot_type& success_cb, const snapshot_saved_signal_t::slot_type& failure_cb)
{
    if (!image)
    {
        LL_WARNS() << "No image to save" << LL_ENDL;
        return;
    }
    std::string extension("." + image->getExtension());
    LLImageFormatted* formatted_image = image;
    // Get a base file location if needed.
    if (force_picker || !isSnapshotLocSet())
    {
        std::string proposed_name(sSnapshotBaseName);

        // getSaveFile will append an appropriate extension to the proposed name, based on the ESaveFilter constant passed in.
        LLFilePicker::ESaveFilter pick_type;

        if (extension == ".j2c")
            pick_type = LLFilePicker::FFSAVE_J2C;
        else if (extension == ".bmp")
            pick_type = LLFilePicker::FFSAVE_BMP;
        else if (extension == ".jpg")
            pick_type = LLFilePicker::FFSAVE_JPEG;
        else if (extension == ".png")
            pick_type = LLFilePicker::FFSAVE_PNG;
        else if (extension == ".tga")
            pick_type = LLFilePicker::FFSAVE_TGA;
        else
            pick_type = LLFilePicker::FFSAVE_ALL;

        LLFilePickerReplyThread::startPicker(boost::bind(&LLViewerWindow::onDirectorySelected, this, _1, formatted_image, success_cb, failure_cb), pick_type, proposed_name,
                                        boost::bind(&LLViewerWindow::onSelectionFailure, this, failure_cb));
    }
    else
    {
        saveImageLocal(formatted_image, success_cb, failure_cb);
    }
}

void LLViewerWindow::onDirectorySelected(const std::vector<std::string>& filenames, LLImageFormatted *image, const snapshot_saved_signal_t::slot_type& success_cb, const snapshot_saved_signal_t::slot_type& failure_cb)
{
    // Copy the directory + file name
    std::string filepath = filenames[0];

    gSavedPerAccountSettings.setString("SnapshotBaseName", gDirUtilp->getBaseFileName(filepath, true));
    gSavedPerAccountSettings.setString("SnapshotBaseDir", gDirUtilp->getDirName(filepath));
    saveImageLocal(image, success_cb, failure_cb);
}

void LLViewerWindow::onSelectionFailure(const snapshot_saved_signal_t::slot_type& failure_cb)
{
    failure_cb();
}


void LLViewerWindow::saveImageLocal(LLImageFormatted *image, const snapshot_saved_signal_t::slot_type& success_cb, const snapshot_saved_signal_t::slot_type& failure_cb)
{
    std::string lastSnapshotDir = LLViewerWindow::getLastSnapshotDir();
    if (lastSnapshotDir.empty())
    {
        failure_cb();
        return;
    }

// Check if there is enough free space to save snapshot
#ifdef LL_WINDOWS
    boost::filesystem::path b_path(utf8str_to_utf16str(lastSnapshotDir));
#else
    boost::filesystem::path b_path(lastSnapshotDir);
#endif
    if (!boost::filesystem::is_directory(b_path))
    {
        LLSD args;
        args["PATH"] = lastSnapshotDir;
        LLNotificationsUtil::add("SnapshotToLocalDirNotExist", args);
        resetSnapshotLoc();
        failure_cb();
        return;
    }
    boost::filesystem::space_info b_space = boost::filesystem::space(b_path);
    if (b_space.free < image->getDataSize())
    {
        LLSD args;
        args["PATH"] = lastSnapshotDir;

        std::string needM_bytes_string;
        LLResMgr::getInstance()->getIntegerString(needM_bytes_string, (image->getDataSize()) >> 10);
        args["NEED_MEMORY"] = needM_bytes_string;

        std::string freeM_bytes_string;
        LLResMgr::getInstance()->getIntegerString(freeM_bytes_string, (S32)(b_space.free >> 10));
        args["FREE_MEMORY"] = freeM_bytes_string;

        LLNotificationsUtil::add("SnapshotToComputerFailed", args);

        failure_cb();
    }

    // Look for an unused file name
    bool is_snapshot_name_loc_set = isSnapshotLocSet();
    std::string filepath;
    S32 i = 1;
    S32 err = 0;
    std::string extension("." + image->getExtension());
    do
    {
        filepath = sSnapshotDir;
        filepath += gDirUtilp->getDirDelimiter();
        filepath += sSnapshotBaseName;

        if (is_snapshot_name_loc_set)
        {
            filepath += llformat("_%.3d",i);
        }

        filepath += extension;

        llstat stat_info;
        err = LLFile::stat( filepath, &stat_info );
        i++;
    }
    while( -1 != err  // Search until the file is not found (i.e., stat() gives an error).
            && is_snapshot_name_loc_set); // Or stop if we are rewriting.

    LL_INFOS() << "Saving snapshot to " << filepath << LL_ENDL;
    if (image->save(filepath))
    {
        playSnapshotAnimAndSound();
        success_cb();
    }
    else
    {
        failure_cb();
    }
}

void LLViewerWindow::resetSnapshotLoc()
{
    gSavedPerAccountSettings.setString("SnapshotBaseDir", std::string());
}

// static
void LLViewerWindow::movieSize(S32 new_width, S32 new_height)
{
    LLCoordWindow size;
    LLCoordWindow new_size(new_width, new_height);
    gViewerWindow->getWindow()->getSize(&size);
    if ( size != new_size )
    {
        gViewerWindow->getWindow()->setSize(new_size);
    }
}

bool LLViewerWindow::saveSnapshot(const std::string& filepath, S32 image_width, S32 image_height, bool show_ui, bool show_hud, bool do_rebuild, LLSnapshotModel::ESnapshotLayerType type, LLSnapshotModel::ESnapshotFormat format)
{
    LL_INFOS() << "Saving snapshot to: " << filepath << LL_ENDL;

    LLPointer<LLImageRaw> raw = new LLImageRaw;
    bool success = rawSnapshot(raw, image_width, image_height, true, false, show_ui, show_hud, do_rebuild);

    if (success)
    {
        U8 image_codec = IMG_CODEC_BMP;
        switch (format)
        {
        case LLSnapshotModel::SNAPSHOT_FORMAT_PNG:
            image_codec = IMG_CODEC_PNG;
            break;
        case LLSnapshotModel::SNAPSHOT_FORMAT_JPEG:
            image_codec = IMG_CODEC_JPEG;
            break;
        default:
            image_codec = IMG_CODEC_BMP;
            break;
        }

        LLPointer<LLImageFormatted> formated_image = LLImageFormatted::createFromType(image_codec);
        success = formated_image->encode(raw, 0.0f);
        if (success)
        {
            success = formated_image->save(filepath);
        }
        else
        {
            LL_WARNS() << "Unable to encode snapshot of format " << format << LL_ENDL;
        }
    }
    else
    {
        LL_WARNS() << "Unable to capture raw snapshot" << LL_ENDL;
    }

    return success;
}


void LLViewerWindow::playSnapshotAnimAndSound()
{
    if (gSavedSettings.getBOOL("QuietSnapshotsToDisk"))
    {
        return;
    }
    gAgent.sendAnimationRequest(ANIM_AGENT_SNAPSHOT, ANIM_REQUEST_START);
    send_sound_trigger(LLUUID(gSavedSettings.getString("UISndSnapshot")), 1.0f);
}

bool LLViewerWindow::isSnapshotLocSet() const
{
    std::string snapshot_dir = sSnapshotDir;
    return !snapshot_dir.empty();
}

void LLViewerWindow::resetSnapshotLoc() const
{
    gSavedPerAccountSettings.setString("SnapshotBaseDir", std::string());
}

bool LLViewerWindow::thumbnailSnapshot(LLImageRaw *raw, S32 preview_width, S32 preview_height, bool show_ui, bool show_hud, bool do_rebuild, bool no_post, LLSnapshotModel::ESnapshotLayerType type)
{
    return rawSnapshot(raw, preview_width, preview_height, false, false, show_ui, show_hud, do_rebuild, no_post, type);
}

// Saves the image from the screen to a raw image
// Since the required size might be bigger than the available screen, this method rerenders the scene in parts (called subimages) and copy
// the results over to the final raw image.
bool LLViewerWindow::rawSnapshot(LLImageRaw *raw, S32 image_width, S32 image_height,
    bool keep_window_aspect, bool is_texture, bool show_ui, bool show_hud, bool do_rebuild, bool no_post, LLSnapshotModel::ESnapshotLayerType type, S32 max_size)
{
    if (!raw)
    {
        return false;
    }

    //check if there is enough memory for the snapshot image
    if(image_width * image_height > (1 << 22)) //if snapshot image is larger than 2K by 2K
    {
        if(!LLMemory::tryToAlloc(NULL, image_width * image_height * 3))
        {
            LL_WARNS() << "No enough memory to take the snapshot with size (w : h): " << image_width << " : " << image_height << LL_ENDL ;
            return false ; //there is no enough memory for taking this snapshot.
        }
    }

    // PRE SNAPSHOT
    gSnapshotNoPost = no_post;
    gDisplaySwapBuffers = false;

    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT); // stencil buffer is deprecated | GL_STENCIL_BUFFER_BIT);
    setCursor(UI_CURSOR_WAIT);

    // Hide all the UI widgets first and draw a frame
    bool prev_draw_ui = gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI);

    if ( prev_draw_ui != show_ui)
    {
        LLPipeline::toggleRenderDebugFeature(LLPipeline::RENDER_DEBUG_FEATURE_UI);
    }

    bool hide_hud = !show_hud && LLPipeline::sShowHUDAttachments;
    if (hide_hud)
    {
        LLPipeline::sShowHUDAttachments = false;
    }

    // if not showing ui, use full window to render world view
    updateWorldViewRect(!show_ui);

    // Copy screen to a buffer
    // crop sides or top and bottom, if taking a snapshot of different aspect ratio
    // from window
    LLRect window_rect = show_ui ? getWindowRectRaw() : getWorldViewRectRaw();

    S32 snapshot_width  = window_rect.getWidth();
    S32 snapshot_height = window_rect.getHeight();
    // SNAPSHOT
    S32 window_width  = snapshot_width;
    S32 window_height = snapshot_height;

    // Note: Scaling of the UI is currently *not* supported so we limit the output size if UI is requested
    if (show_ui)
    {
        // If the user wants the UI, limit the output size to the available screen size
        image_width  = llmin(image_width, window_width);
        image_height = llmin(image_height, window_height);
    }

    S32 original_width = 0;
    S32 original_height = 0;
    bool reset_deferred = false;

    LLRenderTarget scratch_space;

    F32 scale_factor = 1.0f ;
    if (!keep_window_aspect || (image_width > window_width) || (image_height > window_height))
    {
        if ((image_width <= gGLManager.mGLMaxTextureSize && image_height <= gGLManager.mGLMaxTextureSize) &&
            (image_width > window_width || image_height > window_height) && LLPipeline::sRenderDeferred && !show_ui)
        {
            U32 color_fmt = type == LLSnapshotModel::SNAPSHOT_TYPE_DEPTH ? GL_DEPTH_COMPONENT : GL_RGBA;
            if (scratch_space.allocate(image_width, image_height, color_fmt, true))
            {
                original_width = gPipeline.mRT->deferredScreen.getWidth();
                original_height = gPipeline.mRT->deferredScreen.getHeight();

                if (gPipeline.allocateScreenBuffer(image_width, image_height))
                {
                    window_width = image_width;
                    window_height = image_height;
                    snapshot_width = image_width;
                    snapshot_height = image_height;
                    reset_deferred = true;
                    mWorldViewRectRaw.set(0, image_height, image_width, 0);
                    LLViewerCamera::getInstance()->setViewHeightInPixels( mWorldViewRectRaw.getHeight() );
                    LLViewerCamera::getInstance()->setAspect( getWorldViewAspectRatio() );
                    scratch_space.bindTarget();
                }
                else
                {
                    scratch_space.release();
                    gPipeline.allocateScreenBuffer(original_width, original_height);
                }
            }
        }

        if (!reset_deferred)
        {
            // if image cropping or need to enlarge the scene, compute a scale_factor
            F32 ratio = llmin( (F32)window_width / image_width , (F32)window_height / image_height) ;
            snapshot_width  = (S32)(ratio * image_width) ;
            snapshot_height = (S32)(ratio * image_height) ;
            scale_factor = llmax(1.0f, 1.0f / ratio) ;
        }
    }

    if (show_ui && scale_factor > 1.f)
    {
        // Note: we should never get there...
        LL_WARNS() << "over scaling UI not supported." << LL_ENDL;
    }

    S32 buffer_x_offset = llfloor(((window_width  - snapshot_width)  * scale_factor) / 2.f);
    S32 buffer_y_offset = llfloor(((window_height - snapshot_height) * scale_factor) / 2.f);

    S32 image_buffer_x = llfloor(snapshot_width  * scale_factor) ;
    S32 image_buffer_y = llfloor(snapshot_height * scale_factor) ;

    if ((image_buffer_x > max_size) || (image_buffer_y > max_size)) // boundary check to avoid memory overflow
    {
        scale_factor *= llmin((F32)max_size / image_buffer_x, (F32)max_size / image_buffer_y) ;
        image_buffer_x = llfloor(snapshot_width  * scale_factor) ;
        image_buffer_y = llfloor(snapshot_height * scale_factor) ;
    }

    LLImageDataLock lock(raw);

    if ((image_buffer_x > 0) && (image_buffer_y > 0))
    {
        raw->resize(image_buffer_x, image_buffer_y, 3);
    }
    else
    {
        return false;
    }

    if (raw->isBufferInvalid())
    {
        return false;
    }

    bool high_res = scale_factor >= 2.f; // Font scaling is slow, only do so if rez is much higher
    if (high_res && show_ui)
    {
        // Note: we should never get there...
        LL_WARNS() << "High res UI snapshot not supported. " << LL_ENDL;
        /*send_agent_pause();
        //rescale fonts
        initFonts(scale_factor);
        LLHUDObject::reshapeAll();*/
    }

    S32 output_buffer_offset_y = 0;

    F32 depth_conversion_factor_1 = (LLViewerCamera::getInstance()->getFar() + LLViewerCamera::getInstance()->getNear()) / (2.f * LLViewerCamera::getInstance()->getFar() * LLViewerCamera::getInstance()->getNear());
    F32 depth_conversion_factor_2 = (LLViewerCamera::getInstance()->getFar() - LLViewerCamera::getInstance()->getNear()) / (2.f * LLViewerCamera::getInstance()->getFar() * LLViewerCamera::getInstance()->getNear());

    // Subimages are in fact partial rendering of the final view. This happens when the final view is bigger than the screen.
    // In most common cases, scale_factor is 1 and there's no more than 1 iteration on x and y
    for (int subimage_y = 0; subimage_y < scale_factor; ++subimage_y)
    {
        S32 subimage_y_offset = llclamp(buffer_y_offset - (subimage_y * window_height), 0, window_height);;
        // handle fractional columns
        U32 read_height = llmax(0, (window_height - subimage_y_offset) -
            llmax(0, (window_height * (subimage_y + 1)) - (buffer_y_offset + raw->getHeight())));

        S32 output_buffer_offset_x = 0;
        for (int subimage_x = 0; subimage_x < scale_factor; ++subimage_x)
        {
            gDisplaySwapBuffers = false;
            gDepthDirty = true;

            S32 subimage_x_offset = llclamp(buffer_x_offset - (subimage_x * window_width), 0, window_width);
            // handle fractional rows
            U32 read_width = llmax(0, (window_width - subimage_x_offset) -
                                    llmax(0, (window_width * (subimage_x + 1)) - (buffer_x_offset + raw->getWidth())));

            // Skip rendering and sampling altogether if either width or height is degenerated to 0 (common in cropping cases)
            if (read_width && read_height)
            {
                const U32 subfield = subimage_x+(subimage_y*llceil(scale_factor));
                display(do_rebuild, scale_factor, subfield, true);

                if (!LLPipeline::sRenderDeferred)
                {
                    // Required for showing the GUI in snapshots and performing bloom composite overlay
                    // Call even if show_ui is false
                    render_ui(scale_factor, subfield);
                    swap();
                }

                for (U32 out_y = 0; out_y < read_height ; out_y++)
                {
                    S32 output_buffer_offset = (
                                                (out_y * (raw->getWidth())) // ...plus iterated y...
                                                + (window_width * subimage_x) // ...plus subimage start in x...
                                                + (raw->getWidth() * window_height * subimage_y) // ...plus subimage start in y...
                                                - output_buffer_offset_x // ...minus buffer padding x...
                                                - (output_buffer_offset_y * (raw->getWidth()))  // ...minus buffer padding y...
                                                ) * raw->getComponents();

                    // Ping the watchdog thread every 100 lines to keep us alive (arbitrary number, feel free to change)
                    if (out_y % 100 == 0)
                    {
                        LLAppViewer::instance()->pingMainloopTimeout("LLViewerWindow::rawSnapshot");
                    }
                    // disable use of glReadPixels when doing nVidia nSight graphics debugging
                    if (!LLRender::sNsightDebugSupport)
                    {
                        if (type == LLSnapshotModel::SNAPSHOT_TYPE_COLOR)
                        {
                            glReadPixels(
                                     subimage_x_offset, out_y + subimage_y_offset,
                                     read_width, 1,
                                     GL_RGB, GL_UNSIGNED_BYTE,
                                     raw->getData() + output_buffer_offset
                                     );
                        }
                        else // LLSnapshotModel::SNAPSHOT_TYPE_DEPTH
                        {
                            LLPointer<LLImageRaw> depth_line_buffer = new LLImageRaw(read_width, 1, sizeof(GL_FLOAT)); // need to store floating point values
                            glReadPixels(
                                         subimage_x_offset, out_y + subimage_y_offset,
                                         read_width, 1,
                                         GL_DEPTH_COMPONENT, GL_FLOAT,
                                         depth_line_buffer->getData()// current output pixel is beginning of buffer...
                                         );

                            for (S32 i = 0; i < (S32)read_width; i++)
                            {
                                F32 depth_float = *(F32*)(depth_line_buffer->getData() + (i * sizeof(F32)));

                                F32 linear_depth_float = 1.f / (depth_conversion_factor_1 - (depth_float * depth_conversion_factor_2));
                                U8 depth_byte = F32_to_U8(linear_depth_float, LLViewerCamera::getInstance()->getNear(), LLViewerCamera::getInstance()->getFar());
                                // write converted scanline out to result image
                                for (S32 j = 0; j < raw->getComponents(); j++)
                                {
                                    *(raw->getData() + output_buffer_offset + (i * raw->getComponents()) + j) = depth_byte;
                                }
                            }
                        }
                    }
                }
            }
            output_buffer_offset_x += subimage_x_offset;
            stop_glerror();
        }
        output_buffer_offset_y += subimage_y_offset;
    }

    gDisplaySwapBuffers = false;
    gSnapshotNoPost = false;
    gDepthDirty = true;

    // POST SNAPSHOT
    if (!gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
    {
        LLPipeline::toggleRenderDebugFeature(LLPipeline::RENDER_DEBUG_FEATURE_UI);
    }

    if (hide_hud)
    {
        LLPipeline::sShowHUDAttachments = true;
    }

    /*if (high_res)
    {
        initFonts(1.f);
        LLHUDObject::reshapeAll();
    }*/

    // Pre-pad image to number of pixels such that the line length is a multiple of 4 bytes (for BMP encoding)
    // Note: this formula depends on the number of components being 3.  Not obvious, but it's correct.
    image_width += (image_width * 3) % 4;

    bool ret = true ;
    // Resize image
    if(llabs(image_width - image_buffer_x) > 4 || llabs(image_height - image_buffer_y) > 4)
    {
        ret = raw->scale( image_width, image_height );
    }
    else if(image_width != image_buffer_x || image_height != image_buffer_y)
    {
        ret = raw->scale( image_width, image_height, false );
    }

    setCursor(UI_CURSOR_ARROW);

    if (do_rebuild)
    {
        // If we had to do a rebuild, that means that the lists of drawables to be rendered
        // was empty before we started.
        // Need to reset these, otherwise we call state sort on it again when render gets called the next time
        // and we stand a good chance of crashing on rebuild because the render drawable arrays have multiple copies of
        // objects on them.
        gPipeline.resetDrawOrders();
    }

    if (reset_deferred)
    {
        mWorldViewRectRaw = window_rect;
        LLViewerCamera::getInstance()->setViewHeightInPixels( mWorldViewRectRaw.getHeight() );
        LLViewerCamera::getInstance()->setAspect( getWorldViewAspectRatio() );
        scratch_space.flush();
        scratch_space.release();
        gPipeline.allocateScreenBuffer(original_width, original_height);

    }

    if (high_res)
    {
        send_agent_resume();
    }

    return ret;
}

bool LLViewerWindow::simpleSnapshot(LLImageRaw* raw, S32 image_width, S32 image_height, const int num_render_passes)
{
    LL_PROFILE_ZONE_SCOPED_CATEGORY_APP;
    gDisplaySwapBuffers = false;

    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT); // stencil buffer is deprecated | GL_STENCIL_BUFFER_BIT);
    setCursor(UI_CURSOR_WAIT);

    bool prev_draw_ui = gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI);
    if (prev_draw_ui)
    {
        LLPipeline::toggleRenderDebugFeature(LLPipeline::RENDER_DEBUG_FEATURE_UI);
    }

    bool hide_hud = LLPipeline::sShowHUDAttachments;
    if (hide_hud)
    {
        LLPipeline::sShowHUDAttachments = false;
    }

    LLRect window_rect = getWorldViewRectRaw();

    S32 original_width = LLPipeline::sRenderDeferred ? gPipeline.mRT->deferredScreen.getWidth() : gViewerWindow->getWorldViewWidthRaw();
    S32 original_height = LLPipeline::sRenderDeferred ? gPipeline.mRT->deferredScreen.getHeight() : gViewerWindow->getWorldViewHeightRaw();

    LLRenderTarget scratch_space;
    U32 color_fmt = GL_RGBA;
    if (scratch_space.allocate(image_width, image_height, color_fmt, true))
    {
        if (gPipeline.allocateScreenBuffer(image_width, image_height))
        {
            mWorldViewRectRaw.set(0, image_height, image_width, 0);

            scratch_space.bindTarget();
        }
        else
        {
            scratch_space.release();
            gPipeline.allocateScreenBuffer(original_width, original_height);
        }
    }

    // we render the scene more than once since this helps
    // greatly with the objects not being drawn in the
    // snapshot when they are drawn in the scene. This is
    // evident when you set this value via the debug setting
    // called 360CaptureNumRenderPasses to 1. The theory is
    // that the missing objects are caused by the sUseOcclusion
    // property in pipeline but that the use in pipeline.cpp
    // lags by a frame or two so rendering more than once
    // appears to help a lot.
    for (int i = 0; i < num_render_passes; ++i)
    {
        // turning this flag off here prohibits the screen swap
        // to present the new page to the viewer - this stops
        // the black flash in between captures when the number
        // of render passes is more than 1. We need to also
        // set it here because code in LLViewerDisplay resets
        // it to true each time.
        gDisplaySwapBuffers = false;

        // actually render the scene
        const U32 subfield = 0;
        const bool do_rebuild = true;
        const F32 zoom = 1.0;
        const bool for_snapshot = true;
        display(do_rebuild, zoom, subfield, for_snapshot);
    }

    LLImageDataSharedLock lock(raw);

    glReadPixels(
        0, 0,
        image_width,
        image_height,
        GL_RGB, GL_UNSIGNED_BYTE,
        raw->getData()
    );
    stop_glerror();

    gDisplaySwapBuffers = false;
    gDepthDirty = true;

    if (!gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
    {
        if (prev_draw_ui)
        {
            LLPipeline::toggleRenderDebugFeature(LLPipeline::RENDER_DEBUG_FEATURE_UI);
        }
    }

    if (hide_hud)
    {
        LLPipeline::sShowHUDAttachments = true;
    }

    setCursor(UI_CURSOR_ARROW);

    gPipeline.resetDrawOrders();
    mWorldViewRectRaw = window_rect;
    scratch_space.flush();
    scratch_space.release();
    gPipeline.allocateScreenBuffer(original_width, original_height);

    return true;
}

void display_cube_face();

bool LLViewerWindow::cubeSnapshot(const LLVector3& origin, LLCubeMapArray* cubearray, S32 cubeIndex, S32 face, F32 near_clip, bool dynamic_render, bool useCustomClipPlane, LLPlane clipPlane)
{
    // NOTE: implementation derived from LLFloater360Capture::capture360Images() and simpleSnapshot
    LL_PROFILE_ZONE_SCOPED_CATEGORY_APP;
    LL_PROFILE_GPU_ZONE("cubeSnapshot");
    llassert(LLPipeline::sRenderDeferred);
    llassert(!gCubeSnapshot); //assert a snapshot isn't already in progress

    U32 res = gPipeline.mRT->deferredScreen.getWidth();

    //llassert(res <= gPipeline.mRT->deferredScreen.getWidth());
    //llassert(res <= gPipeline.mRT->deferredScreen.getHeight());

    // save current view/camera settings so we can restore them afterwards
    S32 old_occlusion = LLPipeline::sUseOcclusion;

    // set new parameters specific to the 360 requirements
    LLPipeline::sUseOcclusion = 0;
    LLViewerCamera* camera = LLViewerCamera::getInstance();

    LLViewerCamera saved_camera = LLViewerCamera::instance();
    glm::mat4 saved_proj = get_current_projection();
    glm::mat4 saved_mod = get_current_modelview();

    // camera constants for the square, cube map capture image
    camera->setAspect(1.0); // must set aspect ratio first to avoid undesirable clamping of vertical FoV
    camera->setViewNoBroadcast(F_PI_BY_TWO);
    camera->yaw(0.0);
    camera->setOrigin(origin);
    camera->setNear(near_clip);

    LLPlane previousClipPlane;

    if (useCustomClipPlane)
    {
        previousClipPlane = camera->getUserClipPlane();
        camera->setUserClipPlane(clipPlane);
    }

    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT); // stencil buffer is deprecated | GL_STENCIL_BUFFER_BIT);

    U32 dynamic_render_types[] = {
        LLPipeline::RENDER_TYPE_AVATAR,
        LLPipeline::RENDER_TYPE_CONTROL_AV,
        LLPipeline::RENDER_TYPE_PARTICLES
    };
    constexpr U32 dynamic_render_type_count = sizeof(dynamic_render_types) / sizeof(U32);
    bool prev_dynamic_render_type[dynamic_render_type_count];


    if (!dynamic_render)
    {
        for (int i = 0; i < dynamic_render_type_count; ++i)
        {
            prev_dynamic_render_type[i] = gPipeline.hasRenderType(dynamic_render_types[i]);
            if (prev_dynamic_render_type[i])
            {
                gPipeline.toggleRenderType(dynamic_render_types[i]);
            }
        }
    }

    bool prev_draw_ui = gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI);
    if (prev_draw_ui)
    {
        LLPipeline::toggleRenderDebugFeature(LLPipeline::RENDER_DEBUG_FEATURE_UI);
    }

    bool hide_hud = LLPipeline::sShowHUDAttachments;
    if (hide_hud)
    {
        LLPipeline::sShowHUDAttachments = false;
    }
    LLRect window_rect = getWorldViewRectRaw();

    mWorldViewRectRaw.set(0, res, res, 0);

    // these are the 6 directions we will point the camera, see LLCubeMapArray::sTargets
    LLVector3 look_dirs[6] = {
        LLVector3(1, 0, 0),
        LLVector3(-1, 0, 0),
        LLVector3(0, 1, 0),
        LLVector3(0, -1, 0),
        LLVector3(0, 0, 1),
        LLVector3(0, 0, -1)
    };

    LLVector3 look_upvecs[6] = {
        LLVector3(0, -1, 0),
        LLVector3(0, -1, 0),
        LLVector3(0, 0, 1),
        LLVector3(0, 0, -1),
        LLVector3(0, -1, 0),
        LLVector3(0, -1, 0)
    };

    // for each of six sides of cubemap
    //for (int i = 0; i < 6; ++i)
    int i = face;
    {
        // set up camera to look in each direction
        camera->lookDir(look_dirs[i], look_upvecs[i]);

        // turning this flag off here prohibits the screen swap
        // to present the new page to the viewer - this stops
        // the black flash in between captures when the number
        // of render passes is more than 1. We need to also
        // set it here because code in LLViewerDisplay resets
        // it to true each time.
        gDisplaySwapBuffers = false;

        // actually render the scene
        gCubeSnapshot = true;
        display_cube_face();
        gCubeSnapshot = false;
    }

    gDisplaySwapBuffers = true;

    if (!gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_UI))
    {
        if (prev_draw_ui)
        {
            LLPipeline::toggleRenderDebugFeature(LLPipeline::RENDER_DEBUG_FEATURE_UI);
        }
    }

    if (!dynamic_render)
    {
        for (int i = 0; i < dynamic_render_type_count; ++i)
        {
            if (prev_dynamic_render_type[i])
            {
                gPipeline.toggleRenderType(dynamic_render_types[i]);
            }
        }
    }

    if (hide_hud)
    {
        LLPipeline::sShowHUDAttachments = true;
    }

    gPipeline.resetDrawOrders();
    mWorldViewRectRaw = window_rect;

    if (useCustomClipPlane)
    {
        camera->setUserClipPlane(previousClipPlane);
    }

    // restore original view/camera/avatar settings settings
    *camera = saved_camera;
    set_current_modelview(saved_mod);
    set_current_projection(saved_proj);
    setup3DViewport();
    LLPipeline::sUseOcclusion = old_occlusion;

    // ====================================================
    return true;
}

void LLViewerWindow::destroyWindow()
{
    if (mWindow)
    {
        LLWindowManager::destroyWindow(mWindow);
    }
    mWindow = NULL;
}


void LLViewerWindow::drawMouselookInstructions()
{
    // Draw instructions for mouselook ("Press ESC to return to World View" partially transparent at the bottom of the screen.)
    const std::string instructions = LLTrans::getString("LeaveMouselook");
    const LLFontGL* font = LLFontGL::getFont(LLFontDescriptor("SansSerif", "Large", LLFontGL::BOLD));

    //to be on top of Bottom bar when it is opened
    const S32 INSTRUCTIONS_PAD = 50;

    font->renderUTF8(
        instructions, 0,
        getWorldViewRectScaled().getCenterX(),
        getWorldViewRectScaled().mBottom + INSTRUCTIONS_PAD,
        LLColor4( 1.0f, 1.0f, 1.0f, 0.5f ),
        LLFontGL::HCENTER, LLFontGL::TOP,
        LLFontGL::NORMAL,LLFontGL::DROP_SHADOW);
}

void* LLViewerWindow::getPlatformWindow() const
{
    return mWindow->getPlatformWindow();
}

void* LLViewerWindow::getMediaWindow()  const
{
    return mWindow->getMediaWindow();
}

void LLViewerWindow::focusClient()      const
{
    return mWindow->focusClient();
}

LLRootView* LLViewerWindow::getRootView() const
{
    return mRootView;
}

LLRect LLViewerWindow::getWorldViewRectScaled() const
{
    return mWorldViewRectScaled;
}

S32 LLViewerWindow::getWorldViewHeightScaled() const
{
    return mWorldViewRectScaled.getHeight();
}

S32 LLViewerWindow::getWorldViewWidthScaled() const
{
    return mWorldViewRectScaled.getWidth();
}


S32 LLViewerWindow::getWorldViewHeightRaw() const
{
    return mWorldViewRectRaw.getHeight();
}

S32 LLViewerWindow::getWorldViewWidthRaw() const
{
    return mWorldViewRectRaw.getWidth();
}

S32 LLViewerWindow::getWindowHeightScaled() const
{
    return mWindowRectScaled.getHeight();
}

S32 LLViewerWindow::getWindowWidthScaled() const
{
    return mWindowRectScaled.getWidth();
}

S32 LLViewerWindow::getWindowHeightRaw()    const
{
    return mWindowRectRaw.getHeight();
}

S32 LLViewerWindow::getWindowWidthRaw() const
{
    return mWindowRectRaw.getWidth();
}

void LLViewerWindow::setup2DRender()
{
    // setup ortho camera
    gl_state_for_2d(mWindowRectRaw.getWidth(), mWindowRectRaw.getHeight());
    setup2DViewport();
}

void LLViewerWindow::setup2DViewport(S32 x_offset, S32 y_offset)
{
    gGLViewport[0] = mWindowRectRaw.mLeft + x_offset;
    gGLViewport[1] = mWindowRectRaw.mBottom + y_offset;
    gGLViewport[2] = mWindowRectRaw.getWidth();
    gGLViewport[3] = mWindowRectRaw.getHeight();
    glViewport(gGLViewport[0], gGLViewport[1], gGLViewport[2], gGLViewport[3]);
}


void LLViewerWindow::setup3DRender()
{
    // setup perspective camera
    LLViewerCamera::getInstance()->setPerspective(NOT_FOR_SELECTION, mWorldViewRectRaw.mLeft, mWorldViewRectRaw.mBottom,  mWorldViewRectRaw.getWidth(), mWorldViewRectRaw.getHeight(), false, LLViewerCamera::getInstance()->getNear(), MAX_FAR_CLIP*2.f);
    setup3DViewport();
}

void LLViewerWindow::setup3DViewport(S32 x_offset, S32 y_offset)
{
    LL_PROFILE_ZONE_SCOPED_CATEGORY_UI;
    gGLViewport[0] = mWorldViewRectRaw.mLeft + x_offset;
    gGLViewport[1] = mWorldViewRectRaw.mBottom + y_offset;
    gGLViewport[2] = mWorldViewRectRaw.getWidth();
    gGLViewport[3] = mWorldViewRectRaw.getHeight();
    glViewport(gGLViewport[0], gGLViewport[1], gGLViewport[2], gGLViewport[3]);
}

void LLViewerWindow::revealIntroPanel()
{
    if (mProgressView)
    {
        mProgressView->revealIntroPanel();
    }
}

void LLViewerWindow::initTextures(S32 location_id)
{
    if (mProgressView)
    {
        mProgressView->initTextures(location_id, LLGridManager::getInstance()->isInProductionGrid());
    }
}

void LLViewerWindow::setShowProgress(const bool show)
{
    if (mProgressView)
    {
        mProgressView->setVisible(show);
    }
}

void LLViewerWindow::setStartupComplete()
{
    if (mProgressView)
    {
        mProgressView->setStartupComplete();
    }
}

bool LLViewerWindow::getShowProgress() const
{
    return (mProgressView && mProgressView->getVisible());
}

void LLViewerWindow::setProgressString(const std::string& string)
{
    if (mProgressView)
    {
        mProgressView->setText(string);
    }
}

void LLViewerWindow::setProgressMessage(const std::string& msg)
{
    if(mProgressView)
    {
        mProgressView->setMessage(msg);
    }
}

void LLViewerWindow::setProgressPercent(const F32 percent)
{
    if (mProgressView)
    {
        mProgressView->setPercent(percent);
    }
}

void LLViewerWindow::setProgressCancelButtonVisible( bool b, const std::string& label )
{
    if (mProgressView)
    {
        mProgressView->setCancelButtonVisible( b, label );
    }
}

LLProgressView *LLViewerWindow::getProgressView() const
{
    return mProgressView;
}

void LLViewerWindow::dumpState()
{
    LL_INFOS() << "LLViewerWindow Active " << S32(mActive) << LL_ENDL;
    LL_INFOS() << "mWindow visible " << S32(mWindow->getVisible())
        << " minimized " << S32(mWindow->getMinimized())
        << LL_ENDL;
}

void LLViewerWindow::stopGL()
{
    //Note: --bao
    //if not necessary, do not change the order of the function calls in this function.
    //if change something, make sure it will not break anything.
    //especially be careful to put anything behind gTextureList.destroyGL(save_state);
    if (!gGLManager.mIsDisabled)
    {
        LL_INFOS() << "Shutting down GL..." << LL_ENDL;

        // Pause texture decode threads (will get unpaused during main loop)
        LLAppViewer::getTextureCache()->pause();
        LLAppViewer::getTextureFetch()->pause();

        gSky.destroyGL();
        stop_glerror();

        LLManipTranslate::destroyGL() ;
        stop_glerror();

        gBumpImageList.destroyGL();
        stop_glerror();

        LLFontGL::destroyAllGL();
        stop_glerror();

        LLVOAvatar::destroyGL();
        stop_glerror();

        LLVOPartGroup::destroyGL();

        LLViewerDynamicTexture::destroyGL();
        stop_glerror();

        if (gPipeline.isInit())
        {
            gPipeline.destroyGL();
        }

        gBox.cleanupGL();

        if(gPostProcess)
        {
            gPostProcess->invalidate();
        }

        gTextureList.destroyGL();
        stop_glerror();

        gGLManager.mIsDisabled = true;
        stop_glerror();

        //unload shader's
        while (LLGLSLShader::sInstances.size())
        {
            LLGLSLShader* shader = *(LLGLSLShader::sInstances.begin());
            shader->unload();
        }
    }
}

void LLViewerWindow::restoreGL(const std::string& progress_message)
{
    llassert(false);
    // DEPRECATED -- this is left over from when we would completely destroy and restore a GL context
    // when switching from windowed to fullscreen.  None of this machinery has been exercised in years
    // and is unreliable.  If we ever *do* have another use case where completely unloading and reloading
    // everthing is necessary, requiring a viewer restart for that operation is a fine thing to do.
    // -- davep


    //Note: --bao
    //if not necessary, do not change the order of the function calls in this function.
    //if change something, make sure it will not break anything.
    //especially, be careful to put something before gTextureList.restoreGL();
    if (gGLManager.mIsDisabled)
    {
        LL_INFOS() << "Restoring GL..." << LL_ENDL;
        gGLManager.mIsDisabled = false;

        initGLDefaults();
        LLGLState::restoreGL();

        // for future support of non-square pixels, and fonts that are properly stretched
        //LLFontGL::destroyDefaultFonts();
        initFonts();

        gSky.restoreGL();
        gPipeline.restoreGL();
        LLManipTranslate::restoreGL();

        gBumpImageList.restoreGL();
        LLViewerDynamicTexture::restoreGL();
        LLVOAvatar::restoreGL();
        LLVOPartGroup::restoreGL();

        gResizeScreenTexture = true;
        gWindowResized = true;

        if (isAgentAvatarValid() && gAgentAvatarp->isEditingAppearance())
        {
            LLVisualParamHint::requestHintUpdates();
        }

        if (!progress_message.empty())
        {
            gRestoreGLTimer.reset();
            gRestoreGL = true;
            setShowProgress(true);
            setProgressString(progress_message);
        }
        LL_INFOS() << "...Restoring GL done" << LL_ENDL;
        if(!LLAppViewer::instance()->restoreErrorTrap())
        {
            LL_WARNS() << " Someone took over my signal/exception handler (post restoreGL)!" << LL_ENDL;
        }

    }
}

void LLViewerWindow::initFonts(F32 zoom_factor)
{
    LLFontGL::destroyAllGL();
    // Initialize with possibly different zoom factor

    LLFontManager::initClass();

    LLFontGL::initClass( gSavedSettings.getF32("FontScreenDPI"),
                                mDisplayScale.mV[VX] * zoom_factor,
                                mDisplayScale.mV[VY] * zoom_factor,
                                gDirUtilp->getAppRODataDir());
}

void LLViewerWindow::requestResolutionUpdate()
{
    mResDirty = true;
}

static LLTrace::BlockTimerStatHandle FTM_WINDOW_CHECK_SETTINGS("Window Settings");

void LLViewerWindow::checkSettings()
{
    LL_RECORD_BLOCK_TIME(FTM_WINDOW_CHECK_SETTINGS);
    if (mStatesDirty)
    {
        gGL.refreshState();
        LLViewerShaderMgr::instance()->setShaders();
        mStatesDirty = false;
    }

    // We want to update the resolution AFTER the states getting refreshed not before.
    if (mResDirty)
    {
        reshape(getWindowWidthRaw(), getWindowHeightRaw());
        mResDirty = false;
    }
}

F32 LLViewerWindow::getWorldViewAspectRatio() const
{
    F32 world_aspect = (F32)mWorldViewRectRaw.getWidth() / (F32)mWorldViewRectRaw.getHeight();
    return world_aspect;
}

void LLViewerWindow::calcDisplayScale()
{
    F32 ui_scale_factor = llclamp(gSavedSettings.getF32("UIScaleFactor") * mWindow->getSystemUISize(), MIN_UI_SCALE, MAX_UI_SCALE);
    LLVector2 display_scale;
    display_scale.setVec(llmax(1.f / mWindow->getPixelAspectRatio(), 1.f), llmax(mWindow->getPixelAspectRatio(), 1.f));
    display_scale *= ui_scale_factor;

    // limit minimum display scale
    if (display_scale.mV[VX] < MIN_DISPLAY_SCALE || display_scale.mV[VY] < MIN_DISPLAY_SCALE)
    {
        display_scale *= MIN_DISPLAY_SCALE / llmin(display_scale.mV[VX], display_scale.mV[VY]);
    }

    if (display_scale != mDisplayScale)
    {
        LL_INFOS() << "Setting display scale to " << display_scale << " for ui scale: " << ui_scale_factor << LL_ENDL;

        mDisplayScale = display_scale;
        // Init default fonts
        initFonts();
    }
}

//static
LLRect  LLViewerWindow::calcScaledRect(const LLRect & rect, const LLVector2& display_scale)
{
    LLRect res = rect;
    res.mLeft = ll_round((F32)res.mLeft / display_scale.mV[VX]);
    res.mRight = ll_round((F32)res.mRight / display_scale.mV[VX]);
    res.mBottom = ll_round((F32)res.mBottom / display_scale.mV[VY]);
    res.mTop = ll_round((F32)res.mTop / display_scale.mV[VY]);

    return res;
}

S32 LLViewerWindow::getChatConsoleBottomPad()
{
    S32 offset = 0;

    if(gToolBarView)
        offset += gToolBarView->getBottomToolbar()->getRect().getHeight();

    return offset;
}

LLRect LLViewerWindow::getChatConsoleRect()
{
    LLRect full_window(0, getWindowHeightScaled(), getWindowWidthScaled(), 0);
    LLRect console_rect = full_window;

    const S32 CONSOLE_PADDING_TOP = 24;
    const S32 CONSOLE_PADDING_LEFT = 24;
    const S32 CONSOLE_PADDING_RIGHT = 10;

    console_rect.mTop    -= CONSOLE_PADDING_TOP;
    console_rect.mBottom += getChatConsoleBottomPad();

    console_rect.mLeft   += CONSOLE_PADDING_LEFT;

    static const bool CHAT_FULL_WIDTH = gSavedSettings.getBOOL("ChatFullWidth");

    if (CHAT_FULL_WIDTH)
    {
        console_rect.mRight -= CONSOLE_PADDING_RIGHT;
    }
    else
    {
        // Make console rect somewhat narrow so having inventory open is
        // less of a problem.
        console_rect.mRight  = console_rect.mLeft + 2 * getWindowWidthScaled() / 3;
    }

    return console_rect;
}

void LLViewerWindow::reshapeStatusBarContainer()
{
    S32 new_height = mStatusBarContainer->getRect().getHeight();
    S32 new_width = mStatusBarContainer->getRect().getWidth();

    if (gSavedSettings.getBOOL("ShowNavbarNavigationPanel"))
    {
        // Navigation bar is outside visible area, expand status_bar_container to show it
        new_height += mNavBarContainer->getRect().getHeight();
    }
    else
    {
        // collapse status_bar_container
        new_height -= mNavBarContainer->getRect().getHeight();
    }
    mStatusBarContainer->reshape(new_width, new_height, true);
}

void LLViewerWindow::resetStatusBarContainer()
{
    LLNavigationBar* navbar = LLNavigationBar::getInstance();
    if (gSavedSettings.getBOOL("ShowNavbarNavigationPanel") || navbar->getVisible())
    {
        // was previously showing navigation bar
        S32 new_height = mStatusBarContainer->getRect().getHeight();
        S32 new_width = mStatusBarContainer->getRect().getWidth();
        new_height -= mNavBarContainer->getRect().getHeight();
        mStatusBarContainer->reshape(new_width, new_height, true);
    }
}
//----------------------------------------------------------------------------


void LLViewerWindow::setUIVisibility(bool visible)
{
    mUIVisible = visible;

    if (!visible)
    {
        gAgentCamera.changeCameraToThirdPerson(false);
        gFloaterView->hideAllFloaters();
    }
    else
    {
        gFloaterView->showHiddenFloaters();
    }

    if (gToolBarView)
    {
        gToolBarView->setToolBarsVisible(visible);
    }

    LLNavigationBar::getInstance()->setVisible(visible ? gSavedSettings.getBOOL("ShowNavbarNavigationPanel") : false);
    LLPanelTopInfoBar::getInstance()->setVisible(visible? gSavedSettings.getBOOL("ShowMiniLocationPanel") : false);
    mStatusBarContainer->setVisible(visible);
}

bool LLViewerWindow::getUIVisibility()
{
    return mUIVisible;
}

////////////////////////////////////////////////////////////////////////////
//
// LLPickInfo
//
LLPickInfo::LLPickInfo()
    : mKeyMask(MASK_NONE),
      mPickCallback(NULL),
      mPickType(PICK_INVALID),
      mWantSurfaceInfo(false),
      mObjectFace(-1),
      mUVCoords(-1.f, -1.f),
      mSTCoords(-1.f, -1.f),
      mXYCoords(-1, -1),
      mIntersection(),
      mNormal(),
      mTangent(),
      mBinormal(),
      mHUDIcon(NULL),
      mPickTransparent(false),
      mPickRigged(false),
      mPickParticle(false)
{
}

LLPickInfo::LLPickInfo(const LLCoordGL& mouse_pos,
    MASK keyboard_mask,
    bool pick_transparent,
    bool pick_rigged,
    bool pick_particle,
    bool pick_reflection_probe,
    bool pick_uv_coords,
    bool pick_unselectable,
    void (*pick_callback)(const LLPickInfo& pick_info))
    : mMousePt(mouse_pos),
    mKeyMask(keyboard_mask),
    mPickCallback(pick_callback),
    mPickType(PICK_INVALID),
    mWantSurfaceInfo(pick_uv_coords),
    mObjectFace(-1),
    mUVCoords(-1.f, -1.f),
    mSTCoords(-1.f, -1.f),
    mXYCoords(-1, -1),
    mNormal(),
    mTangent(),
    mBinormal(),
    mHUDIcon(NULL),
    mPickTransparent(pick_transparent),
    mPickRigged(pick_rigged),
    mPickParticle(pick_particle),
    mPickReflectionProbe(pick_reflection_probe),
      mPickUnselectable(pick_unselectable)
{
}

void LLPickInfo::fetchResults()
{
    S32 face_hit = -1;

    LLVector4a intersection, normal;
    LLVector4a tangent;

    LLVector2 uv;

    LLHUDIcon* hit_icon = gViewerWindow->cursorIntersectIcon(mMousePt.mX, mMousePt.mY, 512.f, &intersection);

    LLVector4a origin;
    origin.load3(LLViewerCamera::getInstance()->getOrigin().mV);
    F32 icon_dist = 0.f;
    LLVector4a start;
    LLVector4a end;
    LLVector4a particle_end;

    if (hit_icon)
    {
        LLVector4a delta;
        delta.setSub(intersection, origin);
        icon_dist = delta.getLength3().getF32();
    }

    LLViewerObject* hit_object = gViewerWindow->cursorIntersect(mMousePt.mX, mMousePt.mY, 512.f,
                                    nullptr, -1, mPickTransparent, mPickRigged, mPickUnselectable, mPickReflectionProbe, &face_hit, &mGLTFNodeIndex, &mGLTFPrimitiveIndex,
                                &intersection, &uv, &normal, &tangent, &start, &end);

    mPickPt = mMousePt;

    U32 te_offset = face_hit > -1 ? face_hit : 0;

    if (mPickParticle)
    { //get the end point of line segement to use for particle raycast
        if (hit_object)
        {
            particle_end = intersection;
        }
        else
        {
            particle_end = end;
        }
    }

    LLViewerObject* objectp = hit_object;


    LLVector4a delta;
    delta.setSub(origin, intersection);

    if (hit_icon &&
        (!objectp ||
        icon_dist < delta.getLength3().getF32()))
    {
        // was this name referring to a hud icon?
        mHUDIcon = hit_icon;
        mPickType = PICK_ICON;
        mPosGlobal = mHUDIcon->getPositionGlobal();

    }
    else if (objectp)
    {
        if( objectp->getPCode() == LLViewerObject::LL_VO_SURFACE_PATCH )
        {
            // Hit land
            mPickType = PICK_LAND;
            mObjectID.setNull(); // land has no id

            // put global position into land_pos
            LLVector3d land_pos;
            if (!gViewerWindow->mousePointOnLandGlobal(mPickPt.mX, mPickPt.mY, &land_pos, mPickUnselectable))
            {
                // The selected point is beyond the draw distance or is otherwise
                // not selectable. Return before calling mPickCallback().
                return;
            }

            // Fudge the land focus a little bit above ground.
            mPosGlobal = land_pos + LLVector3d::z_axis * 0.1f;
        }
        else
        {
            if(isFlora(objectp))
            {
                mPickType = PICK_FLORA;
            }
            else
            {
                mPickType = PICK_OBJECT;
            }

            LLVector3 v_intersection(intersection.getF32ptr());

            mObjectOffset = gAgentCamera.calcFocusOffset(objectp, v_intersection, mPickPt.mX, mPickPt.mY);
            mObjectID = objectp->mID;
            mObjectFace = (te_offset == NO_FACE) ? -1 : (S32)te_offset;



            mPosGlobal = gAgent.getPosGlobalFromAgent(v_intersection);

            if (mWantSurfaceInfo)
            {
                getSurfaceInfo();
            }
        }
    }

    if (mPickParticle)
    { //search for closest particle to click origin out to intersection point
        S32 part_face = -1;

        LLVOPartGroup* group = gPipeline.lineSegmentIntersectParticle(start, particle_end, NULL, &part_face);
        if (group)
        {
            mParticleOwnerID = group->getPartOwner(part_face);
            mParticleSourceID = group->getPartSource(part_face);
        }
    }

    if (mPickCallback)
    {
        mPickCallback(*this);
    }
}

LLPointer<LLViewerObject> LLPickInfo::getObject() const
{
    return gObjectList.findObject( mObjectID );
}

void LLPickInfo::updateXYCoords()
{
    if (mObjectFace > -1)
    {
        const LLTextureEntry* tep = getObject()->getTE(mObjectFace);
        LLPointer<LLViewerTexture> imagep = LLViewerTextureManager::getFetchedTexture(tep->getID());
        if(mUVCoords.mV[VX] >= 0.f && mUVCoords.mV[VY] >= 0.f && imagep.notNull())
        {
            mXYCoords.mX = ll_round(mUVCoords.mV[VX] * (F32)imagep->getWidth());
            mXYCoords.mY = ll_round((1.f - mUVCoords.mV[VY]) * (F32)imagep->getHeight());
        }
    }
}

void LLPickInfo::getSurfaceInfo()
{
    // set values to uninitialized - this is what we return if no intersection is found
    mObjectFace   = -1;
    mUVCoords     = LLVector2(-1, -1);
    mSTCoords     = LLVector2(-1, -1);
    mXYCoords     = LLCoordScreen(-1, -1);
    mIntersection = LLVector3(0,0,0);
    mNormal       = LLVector3(0,0,0);
    mBinormal     = LLVector3(0,0,0);
    mTangent      = LLVector4(0,0,0,0);

    LLVector4a tangent;
    LLVector4a intersection;
    LLVector4a normal;

    tangent.clear();
    normal.clear();
    intersection.clear();

    LLViewerObject* objectp = getObject();

    if (objectp)
    {
        if (gViewerWindow->cursorIntersect(ll_round((F32)mMousePt.mX), ll_round((F32)mMousePt.mY), 1024.f,
                                           objectp, -1, mPickTransparent, mPickRigged, mPickUnselectable, mPickReflectionProbe,
                                           &mObjectFace,
                                           &mGLTFNodeIndex,
                                           &mGLTFPrimitiveIndex,
                                           &intersection,
                                           &mSTCoords,
                                           &normal,
                                           &tangent))
        {
            // if we succeeded with the intersect above, compute the texture coordinates:

            if (objectp->mDrawable.notNull() && mObjectFace > -1)
            {
                LLFace* facep = objectp->mDrawable->getFace(mObjectFace);
                if (facep)
                {
                    mUVCoords = facep->surfaceToTexture(mSTCoords, intersection, normal);
            }
            }

            mIntersection.set(intersection.getF32ptr());
            mNormal.set(normal.getF32ptr());
            mTangent.set(tangent.getF32ptr());

            //extrapoloate binormal from normal and tangent

            LLVector4a binormal;
            binormal.setCross3(normal, tangent);
            binormal.mul(tangent.getF32ptr()[3]);

            mBinormal.set(binormal.getF32ptr());

            mBinormal.normalize();
            mNormal.normalize();
            mTangent.normalize();

            // and XY coords:
            updateXYCoords();

        }
    }
}

//static
bool LLPickInfo::isFlora(LLViewerObject* object)
{
    if (!object) return false;

    LLPCode pcode = object->getPCode();

    if( (LL_PCODE_LEGACY_GRASS == pcode)
        || (LL_PCODE_LEGACY_TREE == pcode)
        || (LL_PCODE_TREE_NEW == pcode))
    {
        return true;
    }
    return false;
}