tracy/server/TracyView.cpp

#include <algorithm>
#include <assert.h>
#include <chrono>
#include <inttypes.h>
#include <limits>
#include <math.h>
#include <mutex>
#include <stdlib.h>
#include <time.h>

#include "../common/TracySystem.hpp"
#include "tracy_pdqsort.h"
#include "TracyFileWrite.hpp"
#include "TracyImGui.hpp"
#include "TracyPopcnt.hpp"
#include "TracyView.hpp"

#ifdef TRACY_FILESELECTOR
#  include "../nfd/nfd.h"
#endif

namespace tracy
{

static const char* TimeToString( int64_t ns )
{
    enum { Pool = 8 };
    static char bufpool[Pool][64];
    static int bufsel = 0;
    char* buf = bufpool[bufsel];
    bufsel = ( bufsel + 1 ) % Pool;

    const char* sign = "";
    if( ns < 0 )
    {
        sign = "-";
        ns = -ns;
    }

    if( ns < 1000 )
    {
        sprintf( buf, "%s%" PRIi64 " ns", sign, ns );
    }
    else if( ns < 1000ll * 1000 )
    {
        sprintf( buf, "%s%.2f us", sign, ns / 1000. );
    }
    else if( ns < 1000ll * 1000 * 1000 )
    {
        sprintf( buf, "%s%.2f ms", sign, ns / ( 1000. * 1000. ) );
    }
    else if( ns < 1000ll * 1000 * 1000 * 60 )
    {
        sprintf( buf, "%s%.2f s", sign, ns / ( 1000. * 1000. * 1000. ) );
    }
    else
    {
        const auto m = int64_t( ns / ( 1000ll * 1000 * 1000 * 60 ) );
        const auto s = int64_t( ns - m * ( 1000ll * 1000 * 1000 * 60 ) );
        sprintf( buf, "%s%" PRIi64 ":%04.1f", sign, m, s / ( 1000. * 1000. * 1000. ) );
    }
    return buf;
}

static const char* TimeToStringInteger( int64_t ns )
{
    enum { Pool = 8 };
    static char bufpool[Pool][64];
    static int bufsel = 0;
    char* buf = bufpool[bufsel];
    bufsel = ( bufsel + 1 ) % Pool;

    const char* sign = "";
    if( ns < 0 )
    {
        sign = "-";
        ns = -ns;
    }

    if( ns < 1000 )
    {
        sprintf( buf, "%s%" PRIi64 " ns", sign, ns );
    }
    else if( ns < 1000ll * 1000 )
    {
        sprintf( buf, "%s%.0f us", sign, ns / 1000. );
    }
    else if( ns < 1000ll * 1000 * 1000 )
    {
        sprintf( buf, "%s%.0f ms", sign, ns / ( 1000. * 1000. ) );
    }
    else if( ns < 1000ll * 1000 * 1000 * 60 )
    {
        sprintf( buf, "%s%.0f s", sign, ns / ( 1000. * 1000. * 1000. ) );
    }
    else
    {
        const auto m = int64_t( ns / ( 1000ll * 1000 * 1000 * 60 ) );
        const auto s = int64_t( ns - m * ( 1000ll * 1000 * 1000 * 60 ) );
        sprintf( buf, "%s%" PRIi64 ":%02.0f", sign, m, s / ( 1000. * 1000. * 1000. ) );
    }
    return buf;
}

static const char* RealToString( double val, bool separator )
{
    enum { Pool = 8 };
    static char bufpool[Pool][64];
    static int bufsel = 0;
    char* buf = bufpool[bufsel];
    bufsel = ( bufsel + 1 ) % Pool;

    sprintf( buf, "%f", val );
    auto ptr = buf;
    if( *ptr == '-' ) ptr++;

    const auto vbegin = ptr;

    if( separator )
    {
        while( *ptr != '\0' && *ptr != ',' && *ptr != '.' ) ptr++;
        auto end = ptr;
        while( *end != '\0' ) end++;
        auto sz = end - ptr;

        while( ptr - vbegin > 3 )
        {
            ptr -= 3;
            memmove( ptr+1, ptr, sz );
            *ptr = ',';
            sz += 4;
        }
    }

    while( *ptr != '\0' && *ptr != ',' && *ptr != '.' ) ptr++;

    if( *ptr == '\0' ) return buf;
    while( *ptr != '\0' ) ptr++;
    ptr--;
    while( *ptr == '0' && *ptr != ',' && *ptr != '.' ) ptr--;
    if( *ptr != '.' && *ptr != ',' ) ptr++;
    *ptr = '\0';
    return buf;
}


enum { MinVisSize = 3 };

static View* s_instance = nullptr;

View::View( const char* addr )
    : m_worker( addr )
    , m_staticView( false )
    , m_frameScale( 0 )
    , m_pause( false )
    , m_frameStart( 0 )
    , m_zvStart( 0 )
    , m_zvEnd( 0 )
    , m_zvHeight( 0 )
    , m_zvScroll( 0 )
    , m_zoneInfoWindow( nullptr )
    , m_lockHighlight { -1 }
    , m_gpuInfoWindow( nullptr )
    , m_drawRegion( false )
    , m_gpuThread( 0 )
    , m_gpuStart( 0 )
    , m_gpuEnd( 0 )
    , m_showOptions( false )
    , m_showMessages( false )
    , m_drawGpuZones( true )
    , m_drawZones( true )
    , m_drawLocks( true )
    , m_drawPlots( true )
    , m_onlyContendedLocks( false )
    , m_namespace( Namespace::Full )
{
    assert( s_instance == nullptr );
    s_instance = this;

    ImGuiStyle& style = ImGui::GetStyle();
    style.FrameRounding = 2.f;
}

View::View( FileRead& f )
    : m_worker( f )
    , m_staticView( true )
    , m_frameScale( 0 )
    , m_pause( false )
    , m_frameStart( 0 )
    , m_zvStart( 0 )
    , m_zvEnd( 0 )
    , m_zvHeight( 0 )
    , m_zvScroll( 0 )
    , m_zoneInfoWindow( nullptr )
    , m_gpuInfoWindow( nullptr )
    , m_drawRegion( false )
    , m_gpuThread( 0 )
    , m_gpuStart( 0 )
    , m_gpuEnd( 0 )
    , m_showOptions( false )
    , m_showMessages( false )
    , m_drawGpuZones( true )
    , m_drawZones( true )
    , m_drawLocks( true )
    , m_drawPlots( true )
    , m_onlyContendedLocks( false )
    , m_namespace( Namespace::Full )
{
    assert( s_instance == nullptr );
    s_instance = this;
}

View::~View()
{
    m_worker.Shutdown();

    assert( s_instance != nullptr );
    s_instance = nullptr;
}

const char* View::ShortenNamespace( const char* name ) const
{
    if( m_namespace == Namespace::Full ) return name;
    if( m_namespace == Namespace::Short )
    {
        auto ptr = name;
        while( *ptr != '\0' ) ptr++;
        while( ptr > name && *ptr != ':' ) ptr--;
        if( *ptr == ':' ) ptr++;
        return ptr;
    }

    static char buf[1024];
    auto dst = buf;
    auto ptr = name;
    for(;;)
    {
        auto start = ptr;
        while( *ptr != '\0' && *ptr != ':' ) ptr++;
        if( *ptr == '\0' )
        {
            memcpy( dst, start, ptr - start + 1 );
            return buf;
        }
        *dst++ = *start;
        *dst++ = ':';
        while( *ptr == ':' ) ptr++;
    }
}

void View::DrawHelpMarker( const char* desc ) const
{
    ImGui::TextDisabled( "(?)" );
    if ( ImGui::IsItemHovered() )
    {
        ImGui::BeginTooltip();
        ImGui::PushTextWrapPos( 450.0f );
        ImGui::TextUnformatted( desc );
        ImGui::PopTextWrapPos();
        ImGui::EndTooltip();
    }
}

void View::DrawTextContrast( ImDrawList* draw, const ImVec2& pos, uint32_t color, const char* text )
{
    draw->AddText( pos + ImVec2( 1, 1 ), 0x88000000, text );
    draw->AddText( pos, color, text );
}

void View::Draw()
{
    s_instance->DrawImpl();
}

void View::DrawImpl()
{
    if( !m_worker.HasData() )
    {
        ImGui::Begin( m_worker.GetAddr().c_str(), nullptr, ImGuiWindowFlags_AlwaysAutoResize );
        ImGui::Text( "Waiting for connection..." );
        ImGui::End();
        return;
    }

    if( !m_staticView )
    {
        DrawConnection();
    }

    std::lock_guard<NonRecursiveBenaphore> lock( m_worker.GetDataLock() );
    ImGui::Begin( m_worker.GetCaptureName().c_str(), nullptr, ImGuiWindowFlags_NoScrollbar );
    if( ImGui::Button( m_pause ? "Resume" : "Pause", ImVec2( 70, 0 ) ) ) m_pause = !m_pause;
    ImGui::SameLine();
    if( ImGui::Button( "Options", ImVec2( 70, 0 ) ) ) m_showOptions = true;
    ImGui::SameLine();
    if( ImGui::Button( "Messages", ImVec2( 70, 0 ) ) ) m_showMessages = true;
    ImGui::SameLine();
    if ( ImGui::Button( "Find Zone", ImVec2( 70, 0 ) ) ) m_findZone.show = true;
    ImGui::SameLine();
    ImGui::Text( "Frames: %-7" PRIu64 " Time span: %-10s View span: %-10s Zones: %-13s Queue delay: %s  Timer resolution: %s", m_worker.GetFrameCount(), TimeToString( m_worker.GetLastTime() - m_worker.GetFrameBegin( 0 ) ), TimeToString( m_zvEnd - m_zvStart ), RealToString( m_worker.GetZoneCount(), true ), TimeToString( m_worker.GetDelay() ), TimeToString( m_worker.GetResolution() ) );
    DrawFrames();
    DrawZones();
    ImGui::End();

    m_zoneHighlight = nullptr;
    m_gpuHighlight = nullptr;

    DrawInfoWindow();

    if( m_showOptions ) DrawOptions();
    if( m_showMessages ) DrawMessages();
    if( m_findZone.show ) DrawFindZone();

    if( m_zoomAnim.active )
    {
        const auto& io = ImGui::GetIO();
        m_zoomAnim.progress += io.DeltaTime * m_zoomAnim.lenMod;
        if( m_zoomAnim.progress >= 1.f )
        {
            m_zoomAnim.active = false;
            m_zvStart = m_zoomAnim.start1;
            m_zvEnd = m_zoomAnim.end1;
        }
        else
        {
            const auto v = sqrt( sin( M_PI_2 * m_zoomAnim.progress ) );
            m_zvStart = int64_t( m_zoomAnim.start0 + ( m_zoomAnim.start1 - m_zoomAnim.start0 ) * v );
            m_zvEnd = int64_t( m_zoomAnim.end0 + ( m_zoomAnim.end1 - m_zoomAnim.end0 ) * v );
        }
    }
}

void View::DrawConnection()
{
    const auto ty = ImGui::GetFontSize();
    const auto cs = ty * 0.9f;

    {
        std::lock_guard<NonRecursiveBenaphore> lock( m_worker.GetMbpsDataLock() );
        ImGui::Begin( m_worker.GetAddr().c_str(), nullptr, ImGuiWindowFlags_AlwaysAutoResize );
        const auto& mbpsVector = m_worker.GetMbpsData();
        const auto mbps = mbpsVector.back();
        char buf[64];
        if( mbps < 0.1f )
        {
            sprintf( buf, "%6.2f Kbps", mbps * 1000.f );
        }
        else
        {
            sprintf( buf, "%6.2f Mbps", mbps );
        }
        ImGui::Dummy( ImVec2( cs, 0 ) );
        ImGui::SameLine();
        ImGui::PlotLines( buf, mbpsVector.data(), mbpsVector.size(), 0, nullptr, 0, std::numeric_limits<float>::max(), ImVec2( 150, 0 ) );
        ImGui::Text( "Ratio %.1f%%  Real: %6.2f Mbps", m_worker.GetCompRatio() * 100.f, mbps / m_worker.GetCompRatio() );
    }

    ImGui::Text( "Memory usage: %.2f MB", memUsage.load( std::memory_order_relaxed ) / ( 1024.f * 1024.f ) );

    const auto wpos = ImGui::GetWindowPos() + ImGui::GetWindowContentRegionMin();
    ImGui::GetWindowDrawList()->AddCircleFilled( wpos + ImVec2( 1 + cs * 0.5, 3 + ty * 0.5 ), cs * 0.5, m_worker.IsConnected() ? 0xFF2222CC : 0xFF444444, 10 );

    std::lock_guard<NonRecursiveBenaphore> lock( m_worker.GetDataLock() );
    {
        const auto sz = m_worker.GetFrameCount();
        if( sz > 1 )
        {
            const auto dt = m_worker.GetFrameTime( sz - 2 );
            const auto dtm = dt / 1000000.f;
            const auto fps = 1000.f / dtm;
            ImGui::Text( "FPS: %6.1f  Frame time: %.2f ms", fps, dtm );
        }
    }

    if( ImGui::Button( "Save trace" ) )
    {
#ifdef TRACY_FILESELECTOR
        nfdchar_t* fn;
        auto res = NFD_SaveDialog( "tracy", nullptr, &fn );
        if( res == NFD_OKAY )
#else
        const char* fn = "trace.tracy";
#endif
        {
            std::unique_ptr<FileWrite> f;
            const auto sz = strlen( fn );
            if( sz < 7 || memcmp( fn + sz - 6, ".tracy", 6 ) != 0 )
            {
                char tmp[1024];
                sprintf( tmp, "%s.tracy", fn );
                f.reset( FileWrite::Open( tmp ) );
            }
            else
            {
                f.reset( FileWrite::Open( fn ) );
            }
            if( f )
            {
                m_worker.Write( *f );
            }
        }
    }

    ImGui::End();
}

static ImU32 GetFrameColor( uint64_t frameTime )
{
    enum { BestTime = 1000 * 1000 * 1000 / 143 };
    enum { GoodTime = 1000 * 1000 * 1000 / 59 };
    enum { BadTime = 1000 * 1000 * 1000 / 29 };

    return frameTime > BadTime  ? 0xFF2222DD :
           frameTime > GoodTime ? 0xFF22DDDD :
           frameTime > BestTime ? 0xFF22DD22 : 0xFFDD9900;
}

static int GetFrameWidth( int frameScale )
{
    return frameScale == 0 ? 4 : ( frameScale == -1 ? 6 : 1 );
}

static int GetFrameGroup( int frameScale )
{
    return frameScale < 2 ? 1 : ( 1 << ( frameScale - 1 ) );
}

void View::DrawFrames()
{
    assert( m_worker.GetFrameCount() != 0 );

    enum { Height = 40 };
    enum { MaxFrameTime = 50 * 1000 * 1000 };  // 50ms

    ImGuiWindow* window = ImGui::GetCurrentWindow();
    if( window->SkipItems ) return;

    auto& io = ImGui::GetIO();

    const auto wpos = ImGui::GetCursorScreenPos();
    const auto wspace = ImGui::GetWindowContentRegionMax() - ImGui::GetWindowContentRegionMin();
    const auto w = wspace.x;
    auto draw = ImGui::GetWindowDrawList();

    ImGui::InvisibleButton( "##frames", ImVec2( w, Height ) );
    bool hover = ImGui::IsItemHovered();

    draw->AddRectFilled( wpos, wpos + ImVec2( w, Height ), 0x33FFFFFF );
    const auto wheel = io.MouseWheel;
    const auto prevScale = m_frameScale;
    if( hover )
    {
        if( wheel > 0 )
        {
            if( m_frameScale > -1 ) m_frameScale--;
        }
        else if( wheel < 0 )
        {
            if( m_frameScale < 10 ) m_frameScale++;
        }
    }

    const int fwidth = GetFrameWidth( m_frameScale );
    const int group = GetFrameGroup( m_frameScale );
    const int total = m_worker.GetFrameCount();
    const int onScreen = ( w - 2 ) / fwidth;
    if( !m_pause )
    {
        m_frameStart = ( total < onScreen * group ) ? 0 : total - onScreen * group;
        m_zvStart = m_worker.GetFrameBegin( std::max( 0, total - 4 ) );
        if( total == 1 )
        {
            m_zvEnd = m_worker.GetLastTime();
        }
        else
        {
            m_zvEnd = m_worker.GetFrameBegin( total - 1 );
        }
    }

    if( hover )
    {
        if( ImGui::IsMouseDragging( 1, 0 ) )
        {
            m_pause = true;
            const auto delta = ImGui::GetMouseDragDelta( 1, 0 ).x;
            if( abs( delta ) >= fwidth )
            {
                const auto d = (int)delta / fwidth;
                m_frameStart = std::max( 0, m_frameStart - d * group );
                io.MouseClickedPos[1].x = io.MousePos.x + d * fwidth - delta;
            }
        }

        const auto mx = io.MousePos.x;
        if( mx > wpos.x && mx < wpos.x + w - 1 )
        {
            const auto mo = mx - ( wpos.x + 1 );
            const auto off = mo * group / fwidth;

            const int sel = m_frameStart + off;
            if( sel < total )
            {
                ImGui::BeginTooltip();
                if( group > 1 )
                {
                    auto f = m_worker.GetFrameTime( sel );
                    auto g = std::min( group, total - sel );
                    for( int j=1; j<g; j++ )
                    {
                        f = std::max( f, m_worker.GetFrameTime( sel + j ) );
                    }

                    ImGui::Text( "Frames: %i - %i (%i)", sel, sel + g - 1, g );
                    ImGui::Separator();
                    ImGui::Text( "Max frame time: %s", TimeToString( f ) );
                }
                else
                {
                    if( sel == 0 )
                    {
                        ImGui::Text( "Tracy initialization" );
                        ImGui::Separator();
                        ImGui::Text( "Time: %s", TimeToString( m_worker.GetFrameTime( sel ) ) );
                    }
                    else
                    {
                        ImGui::Text( "Frame: %i", sel );
                        ImGui::Separator();
                        ImGui::Text( "Frame time: %s", TimeToString( m_worker.GetFrameTime( sel ) ) );
                    }
                }
                ImGui::Text( "Time from start of program: %s", TimeToString( m_worker.GetFrameBegin( sel ) - m_worker.GetFrameBegin( 0 ) ) );
                ImGui::EndTooltip();

                if( ImGui::IsMouseClicked( 0 ) )
                {
                    m_pause = true;
                    m_zvStart = m_worker.GetFrameBegin( sel );
                    m_zvEnd = m_worker.GetFrameEnd( sel + group - 1 );
                    if( m_zvStart == m_zvEnd ) m_zvStart--;
                }
                else if( ImGui::IsMouseDragging( 0 ) )
                {
                    m_zvStart = std::min( m_zvStart, m_worker.GetFrameBegin( sel ) );
                    m_zvEnd = std::max( m_zvEnd, m_worker.GetFrameEnd( sel + group - 1 ) );
                }
            }

            if( m_pause && wheel != 0 )
            {
                const int pfwidth = GetFrameWidth( prevScale );
                const int pgroup = GetFrameGroup( prevScale );

                const auto oldoff = mo * pgroup / pfwidth;
                m_frameStart = std::min( total, std::max( 0, m_frameStart - int( off - oldoff ) ) );
            }
        }
    }

    int i = 0, idx = 0;
    while( i < onScreen && m_frameStart + idx < total )
    {
        auto f = m_worker.GetFrameTime( m_frameStart + idx );
        int g;
        if( group > 1 )
        {
            g = std::min( group, total - ( m_frameStart + idx ) );
            for( int j=1; j<g; j++ )
            {
                f = std::max( f, m_worker.GetFrameTime( m_frameStart + idx + j ) );
            }
        }

        const auto h = float( std::min<uint64_t>( MaxFrameTime, f ) ) / MaxFrameTime * ( Height - 2 );
        if( fwidth != 1 )
        {
            draw->AddRectFilled( wpos + ImVec2( 1 + i*fwidth, Height-1-h ), wpos + ImVec2( fwidth + i*fwidth, Height-1 ), GetFrameColor( f ) );
        }
        else
        {
            draw->AddLine( wpos + ImVec2( 1+i, Height-2-h ), wpos + ImVec2( 1+i, Height-2 ), GetFrameColor( f ) );
        }

        i++;
        idx += group;
    }

    const std::pair <int, int> zrange = m_worker.GetFrameRange( m_zvStart, m_zvEnd );

    if( zrange.second > m_frameStart && zrange.first < m_frameStart + onScreen * group )
    {
        auto x1 = std::min( onScreen * fwidth, ( zrange.second - m_frameStart ) * fwidth / group );
        auto x0 = std::max( 0, ( zrange.first - m_frameStart ) * fwidth / group );

        if( x0 == x1 ) x1 = x0 + 1;

        draw->AddRectFilled( wpos + ImVec2( 1+x0, 0 ), wpos + ImVec2( 1+x1, Height ), 0x55DD22DD );
    }
}

void View::HandleZoneViewMouse( int64_t timespan, const ImVec2& wpos, float w, double& pxns )
{
    assert( timespan > 0 );
    auto& io = ImGui::GetIO();

    const auto nspx = double( timespan ) / w;

    if( ImGui::IsMouseClicked( 0 ) )
    {
        m_drawRegion = true;
        m_regionEnd = m_regionStart = m_zvStart + ( io.MousePos.x - wpos.x ) * nspx;
    }
    else if( ImGui::IsMouseDragging( 0, 0 ) )
    {
        m_regionEnd = m_zvStart + ( io.MousePos.x - wpos.x ) * nspx;
    }
    else
    {
        m_drawRegion = false;
    }

    if( ImGui::IsMouseDragging( 1, 0 ) )
    {
        m_pause = true;
        const auto delta = ImGui::GetMouseDragDelta( 1, 0 );
        const auto dpx = int64_t( delta.x * nspx );
        if( dpx != 0 )
        {
            m_zvStart -= dpx;
            m_zvEnd -= dpx;
            io.MouseClickedPos[1].x = io.MousePos.x;
        }
        if( delta.y != 0 )
        {
            auto y = ImGui::GetScrollY();
            ImGui::SetScrollY( y - delta.y );
            io.MouseClickedPos[1].y = io.MousePos.y;
        }
    }

    const auto wheel = io.MouseWheel;
    if( wheel != 0 )
    {
        m_pause = true;
        const double mouse = io.MousePos.x - wpos.x;
        const auto p = mouse / w;
        const auto p1 = timespan * p;
        const auto p2 = timespan - p1;
        if( wheel > 0 )
        {
            m_zvStart += int64_t( p1 * 0.25 );
            m_zvEnd -= int64_t( p2 * 0.25 );
        }
        else if( timespan < 1000ll * 1000 * 1000 * 60 )
        {
            m_zvStart -= std::max( int64_t( 1 ), int64_t( p1 * 0.25 ) );
            m_zvEnd += std::max( int64_t( 1 ), int64_t( p2 * 0.25 ) );
        }
        timespan = m_zvEnd - m_zvStart;
        pxns = w / double( timespan );
    }
}

static const char* GetFrameText( int i, uint64_t ftime )
{
    static char buf[128];
    if( i == 0 )
    {
        sprintf( buf, "Tracy init (%s)", TimeToString( ftime ) );
    }
    else
    {
        sprintf( buf, "Frame %i (%s)", i, TimeToString( ftime ) );
    }
    return buf;
}

bool View::DrawZoneFrames()
{
    const auto wpos = ImGui::GetCursorScreenPos();
    const auto w = ImGui::GetWindowContentRegionWidth() - ImGui::GetStyle().ScrollbarSize;
    const auto h = ImGui::GetFontSize();
    const auto wh = ImGui::GetContentRegionAvail().y;
    auto draw = ImGui::GetWindowDrawList();
    const auto ty = ImGui::GetFontSize();
    const auto fy = round( h * 1.5 );

    ImGui::InvisibleButton( "##zoneFrames", ImVec2( w, h * 2.5 ) );
    bool hover = ImGui::IsItemHovered();

    auto timespan = m_zvEnd - m_zvStart;
    auto pxns = w / double( timespan );

    if( hover ) HandleZoneViewMouse( timespan, wpos, w, pxns );

    {
        const auto nspx = 1.0 / pxns;
        const auto scale = std::max( 0.0, round( log10( nspx ) + 2 ) );
        const auto step = pow( 10, scale );

        const auto dx = step * pxns;
        double x = 0;
        int tw = 0;
        int tx = 0;
        int64_t tt = 0;
        while( x < w )
        {
            draw->AddLine( wpos + ImVec2( x, 0 ), wpos + ImVec2( x, round( ty * 0.5 ) ), 0x66FFFFFF );
            if( tw == 0 )
            {
                char buf[128];
                const auto t = m_zvStart - m_worker.GetFrameBegin( 0 );
                auto txt = TimeToString( t );
                if( t >= 0 )
                {
                    sprintf( buf, "+%s", txt );
                    txt = buf;
                }
                draw->AddText( wpos + ImVec2( x, round( ty * 0.5 ) ), 0x66FFFFFF, txt );
                tw = ImGui::CalcTextSize( txt ).x;
            }
            else if( x > tx + tw + ty * 2 )
            {
                tx = x;
                auto txt = TimeToString( tt );
                draw->AddText( wpos + ImVec2( x, round( ty * 0.5 ) ), 0x66FFFFFF, txt );
                tw = ImGui::CalcTextSize( txt ).x;
            }

            for( int i=1; i<5; i++ )
            {
                draw->AddLine( wpos + ImVec2( x + i * dx / 10, 0 ), wpos + ImVec2( x + i * dx / 10, round( ty * 0.25 ) ), 0x33FFFFFF );
            }
            draw->AddLine( wpos + ImVec2( x + 5 * dx / 10, 0 ), wpos + ImVec2( x + 5 * dx / 10, round( ty * 0.375 ) ), 0x33FFFFFF );
            for( int i=6; i<10; i++ )
            {
                draw->AddLine( wpos + ImVec2( x + i * dx / 10, 0 ), wpos + ImVec2( x + i * dx / 10, round( ty * 0.25 ) ), 0x33FFFFFF );
            }

            x += dx;
            tt += step;
        }
    }

    const std::pair <int, int> zrange = m_worker.GetFrameRange( m_zvStart, m_zvEnd );
    if( zrange.first == -1 ) return hover;

    for( int i = zrange.first; i < zrange.second; i++ )
    {
        const auto ftime = m_worker.GetFrameTime( i );
        const auto fbegin = m_worker.GetFrameBegin( i );
        const auto fend = m_worker.GetFrameEnd( i );
        const auto fsz = pxns * ftime;

        if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( ( fbegin - m_zvStart ) * pxns, fy ), wpos + ImVec2( ( fend - m_zvStart ) * pxns, fy + ty ) ) )
        {
            ImGui::BeginTooltip();
            ImGui::Text( "%s", GetFrameText( i, ftime ) );
            ImGui::Separator();
            ImGui::Text( "Time from start of program: %s", TimeToString( m_worker.GetFrameBegin( i ) - m_worker.GetFrameBegin( 0 ) ) );
            ImGui::EndTooltip();

            if( ImGui::IsMouseClicked( 2 ) )
            {
                ZoomToRange( fbegin, fend );
                m_pause = true;
            }
        }

        if( fsz <= 4 ) continue;

        if( fbegin >= m_zvStart )
        {
            draw->AddLine( wpos + ImVec2( ( fbegin - m_zvStart ) * pxns, 0 ), wpos + ImVec2( ( fbegin - m_zvStart ) * pxns, wh ), 0x22FFFFFF );
        }

        if( fsz >= 5 )
        {
            auto buf = GetFrameText( i, ftime );
            auto tx = ImGui::CalcTextSize( buf ).x;
            uint32_t color = i == 0 ? 0xFF4444FF : 0xFFFFFFFF;

            if( fsz - 5 <= tx )
            {
                buf = TimeToString( ftime );
                tx = ImGui::CalcTextSize( buf ).x;
            }

            if( fbegin >= m_zvStart )
            {
                draw->AddLine( wpos + ImVec2( ( fbegin - m_zvStart ) * pxns + 2, fy + 1 ), wpos + ImVec2( ( fbegin - m_zvStart ) * pxns + 2, fy + ty - 1 ), color );
            }
            if( fend <= m_zvEnd )
            {
                draw->AddLine( wpos + ImVec2( ( fend - m_zvStart ) * pxns - 2, fy + 1 ), wpos + ImVec2( ( fend - m_zvStart ) * pxns - 2, fy + ty - 1 ), color );
            }
            if( fsz - 5 > tx )
            {
                const auto part = ( fsz - 5 - tx ) / 2;
                draw->AddLine( wpos + ImVec2( std::max( -10.0, ( fbegin - m_zvStart ) * pxns + 2 ), fy + round( ty / 2 ) ), wpos + ImVec2( std::min( w + 20.0, ( fbegin - m_zvStart ) * pxns + part ), fy + round( ty / 2 ) ), color );
                draw->AddText( wpos + ImVec2( ( fbegin - m_zvStart ) * pxns + 2 + part, fy ), color, buf );
                draw->AddLine( wpos + ImVec2( std::max( -10.0, ( fbegin - m_zvStart ) * pxns + 2 + part + tx ), fy + round( ty / 2 ) ), wpos + ImVec2( std::min( w + 20.0, ( fend - m_zvStart ) * pxns - 2 ), fy + round( ty / 2 ) ), color );
            }
            else
            {
                draw->AddLine( wpos + ImVec2( std::max( -10.0, ( fbegin - m_zvStart ) * pxns + 2 ), fy + round( ty / 2 ) ), wpos + ImVec2( std::min( w + 20.0, ( fend - m_zvStart ) * pxns - 2 ), fy + round( ty / 2 ) ), color );
            }
        }
    }

    const auto fend = m_worker.GetFrameEnd( zrange.second-1 );
    if( fend == m_zvEnd )
    {
        draw->AddLine( wpos + ImVec2( ( fend - m_zvStart ) * pxns, 0 ), wpos + ImVec2( ( fend - m_zvStart ) * pxns, wh ), 0x22FFFFFF );
    }

    return hover;
}

void View::DrawZones()
{
    m_msgHighlight = nullptr;

    if( m_zvStart == m_zvEnd ) return;
    assert( m_zvStart < m_zvEnd );

    ImGuiWindow* window = ImGui::GetCurrentWindow();
    if( window->SkipItems ) return;

    m_gpuThread = 0;
    m_gpuStart = 0;
    m_gpuEnd = 0;

    const auto linepos = ImGui::GetCursorScreenPos();
    const auto lineh = ImGui::GetContentRegionAvail().y;

    auto drawMouseLine = DrawZoneFrames();

    ImGui::BeginChild( "##zoneWin", ImVec2( ImGui::GetWindowContentRegionWidth(), ImGui::GetContentRegionAvail().y ), false, ImGuiWindowFlags_AlwaysVerticalScrollbar | ImGuiWindowFlags_NoScrollWithMouse );

    window = ImGui::GetCurrentWindow();
    const auto wpos = ImGui::GetCursorScreenPos();
    const auto w = ImGui::GetWindowContentRegionWidth() - 1;
    const auto h = std::max<float>( m_zvHeight, ImGui::GetContentRegionAvail().y - 4 );    // magic border value
    auto draw = ImGui::GetWindowDrawList();

    ImGui::InvisibleButton( "##zones", ImVec2( w, h ) );
    bool hover = ImGui::IsItemHovered();

    const auto timespan = m_zvEnd - m_zvStart;
    auto pxns = w / double( timespan );

    if( hover )
    {
        drawMouseLine = true;
        HandleZoneViewMouse( timespan, wpos, w, pxns );
    }

    const auto nspx = 1.0 / pxns;

    const auto ty = ImGui::GetFontSize();
    const auto ostep = ty + 1;
    int offset = 0;
    const auto to = 9.f;
    const auto th = ( ty - to ) * sqrt( 3 ) * 0.5;

    // gpu zones
    if( m_drawGpuZones )
    {
        for( size_t i=0; i<m_worker.GetGpuData().size(); i++ )
        {
            const auto& v = m_worker.GetGpuData()[i];
            if( !Visible( v ) ) continue;

            draw->AddLine( wpos + ImVec2( 0, offset + ostep - 1 ), wpos + ImVec2( w, offset + ostep - 1 ), 0x33FFFFFF );

            bool& showFull = ShowFull( v );
            if( showFull )
            {
                draw->AddTriangleFilled( wpos + ImVec2( to/2, offset + to/2 ), wpos + ImVec2( ty - to/2, offset + to/2 ), wpos + ImVec2( ty * 0.5, offset + to/2 + th ), 0xFFFFAAAA );
            }
            else
            {
                draw->AddTriangle( wpos + ImVec2( to/2, offset + to/2 ), wpos + ImVec2( to/2, offset + ty - to/2 ), wpos + ImVec2( to/2 + th, offset + ty * 0.5 ), 0xFF886666 );
            }
            char buf[64];
            sprintf( buf, "GPU context %i", i );
            draw->AddText( wpos + ImVec2( ty, offset ), showFull ? 0xFFFFAAAA : 0xFF886666, buf );

            if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + ImGui::CalcTextSize( buf ).x, offset + ty ) ) )
            {
                if( ImGui::IsMouseClicked( 0 ) )
                {
                    showFull = !showFull;
                }

                ImGui::BeginTooltip();
                ImGui::Text( "%s", buf );
                ImGui::Separator();
                ImGui::Text( "Thread: %s", m_worker.GetThreadString( v->thread ) );
                if( !v->timeline.empty() )
                {
                    const auto t = v->timeline.front()->gpuStart;
                    if( t != std::numeric_limits<int64_t>::max() )
                    {
                        ImGui::Text( "Appeared at %s", TimeToString( t - m_worker.GetFrameTime( 0 ) ) );
                    }
                }
                ImGui::Text( "Zone count: %s", RealToString( v->count, true ) );
                ImGui::Text( "Top-level zones: %s", RealToString( v->timeline.size(), true ) );
                ImGui::Text( "Query accuracy bits: %i", v->accuracyBits );
                ImGui::EndTooltip();
            }

            offset += ostep;
            if( showFull )
            {
                const auto depth = DrawGpuZoneLevel( v->timeline, hover, pxns, wpos, offset, 0, v->thread );
                offset += ostep * depth;
            }
            offset += ostep * 0.2f;
        }
    }

    // zones
    LockHighlight nextLockHighlight { -1 };
    for( const auto& v : m_worker.GetThreadData() )
    {
        if( !Visible( v ) ) continue;

        draw->AddLine( wpos + ImVec2( 0, offset + ostep - 1 ), wpos + ImVec2( w, offset + ostep - 1 ), 0x33FFFFFF );

        bool& showFull = ShowFull( v );
        if( showFull )
        {
            draw->AddTriangleFilled( wpos + ImVec2( to/2, offset + to/2 ), wpos + ImVec2( ty - to/2, offset + to/2 ), wpos + ImVec2( ty * 0.5, offset + to/2 + th ), 0xFFFFFFFF );

            auto it = std::lower_bound( v->messages.begin(), v->messages.end(), m_zvStart, [] ( const auto& lhs, const auto& rhs ) { return lhs->time < rhs; } );
            auto end = std::lower_bound( it, v->messages.end(), m_zvEnd, [] ( const auto& lhs, const auto& rhs ) { return lhs->time < rhs; } );

            while( it < end )
            {
                const auto next = std::upper_bound( it, v->messages.end(), (*it)->time + MinVisSize * nspx, [] ( const auto& lhs, const auto& rhs ) { return lhs < rhs->time; } );
                const auto dist = std::distance( it, next );

                const auto px = ( (*it)->time - m_zvStart ) * pxns;
                if( dist > 1 )
                {
                    draw->AddTriangleFilled( wpos + ImVec2( px - (ty - to) * 0.5, offset + to ), wpos + ImVec2( px + (ty - to) * 0.5, offset + to ), wpos + ImVec2( px, offset + to + th ), 0xFFDDDDDD );
                }
                draw->AddTriangle( wpos + ImVec2( px - (ty - to) * 0.5, offset + to ), wpos + ImVec2( px + (ty - to) * 0.5, offset + to ), wpos + ImVec2( px, offset + to + th ), 0xFFDDDDDD );
                if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( px - (ty - to) * 0.5 - 1, offset ), wpos + ImVec2( px + (ty - to) * 0.5 + 1, offset + ty ) ) )
                {
                    ImGui::BeginTooltip();
                    if( dist > 1 )
                    {
                        ImGui::Text( "%i messages", (int)dist );
                    }
                    else
                    {
                        ImGui::Text( "%s", TimeToString( (*it)->time - m_worker.GetFrameBegin( 0 ) ) );
                        ImGui::Separator();
                        ImGui::Text( "Message text:" );
                        ImGui::TextColored( ImVec4( 0xCC / 255.f, 0xCC / 255.f, 0x22 / 255.f, 1.f ), "%s", m_worker.GetString( (*it)->ref ) );
                    }
                    ImGui::EndTooltip();
                    m_msgHighlight = *it;
                }
                it = next;
            }
        }
        else
        {
            draw->AddTriangle( wpos + ImVec2( to/2, offset + to/2 ), wpos + ImVec2( to/2, offset + ty - to/2 ), wpos + ImVec2( to/2 + th, offset + ty * 0.5 ), 0xFF888888 );
        }
        const auto txt = m_worker.GetThreadString( v->id );
        const auto txtsz = ImGui::CalcTextSize( txt );
        if( m_gpuThread == v->id )
        {
            draw->AddRectFilled( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + txtsz.x + 4, offset + ty ), 0x448888DD );
            draw->AddRect( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + txtsz.x + 4, offset + ty ), 0x888888DD );
        }
        if( m_gpuInfoWindow && m_gpuInfoWindowThread == v->id )
        {
            draw->AddRectFilled( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + txtsz.x + 4, offset + ty ), 0x4488DD88 );
            draw->AddRect( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + txtsz.x + 4, offset + ty ), 0x8888DD88 );
        }
        draw->AddText( wpos + ImVec2( ty, offset ), showFull ? 0xFFFFFFFF : 0xFF888888, txt );

        if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + txtsz.x, offset + ty ) ) )
        {
            if( ImGui::IsMouseClicked( 0 ) )
            {
                showFull = !showFull;
            }

            ImGui::BeginTooltip();
            ImGui::Text( "%s", m_worker.GetThreadString( v->id ) );
            if( !v->timeline.empty() )
            {
                ImGui::Separator();
                ImGui::Text( "Appeared at %s", TimeToString( v->timeline.front()->start - m_worker.GetFrameBegin( 0 ) ) );
                ImGui::Text( "Zone count: %s", RealToString( v->count, true ) );
                ImGui::Text( "Top-level zones: %s", RealToString( v->timeline.size(), true ) );
            }
            ImGui::EndTooltip();

        }

        offset += ostep;

        if( showFull )
        {
            m_lastCpu = -1;
            if( m_drawZones )
            {
                const auto depth = DrawZoneLevel( v->timeline, hover, pxns, wpos, offset, 0 );
                offset += ostep * depth;
            }

            if( m_drawLocks )
            {
                const auto depth = DrawLocks( v->id, hover, pxns, wpos, offset, nextLockHighlight );
                offset += ostep * depth;
            }
        }
        offset += ostep * 0.2f;
    }
    m_lockHighlight = nextLockHighlight;

    if( m_drawPlots )
    {
        offset = DrawPlots( offset, pxns, wpos, hover );
    }

    const auto scrollPos = ImGui::GetScrollY();
    if( scrollPos == 0 && m_zvScroll != 0 )
    {
        m_zvHeight = 0;
    }
    else
    {
        if( offset > m_zvHeight ) m_zvHeight = offset;
    }
    m_zvScroll = scrollPos;

    ImGui::EndChild();

    if( m_gpuStart != 0 && m_gpuEnd != 0 )
    {
        const auto px0 = ( m_gpuStart - m_zvStart ) * pxns;
        const auto px1 = std::max( px0 + std::max( 1.0, pxns * 0.5 ), ( m_gpuEnd - m_zvStart ) * pxns );
        draw->AddRectFilled( ImVec2( wpos.x + px0, linepos.y ), ImVec2( wpos.x + px1, linepos.y + lineh ), 0x228888DD );
        draw->AddRect( ImVec2( wpos.x + px0, linepos.y ), ImVec2( wpos.x + px1, linepos.y + lineh ), 0x448888DD );
    }
    if( m_gpuInfoWindow )
    {
        const auto px0 = ( m_gpuInfoWindow->cpuStart - m_zvStart ) * pxns;
        const auto px1 = std::max( px0 + std::max( 1.0, pxns * 0.5 ), ( m_gpuInfoWindow->cpuEnd - m_zvStart ) * pxns );
        draw->AddRectFilled( ImVec2( wpos.x + px0, linepos.y ), ImVec2( wpos.x + px1, linepos.y + lineh ), 0x2288DD88 );
        draw->AddRect( ImVec2( wpos.x + px0, linepos.y ), ImVec2( wpos.x + px1, linepos.y + lineh ), 0x4488DD88 );
    }

    if( m_drawRegion && m_regionStart != m_regionEnd )
    {
        const auto s = std::min( m_regionStart, m_regionEnd );
        const auto e = std::max( m_regionStart, m_regionEnd );
        draw->AddRectFilled( ImVec2( wpos.x + ( s - m_zvStart ) * pxns, linepos.y ), ImVec2( wpos.x + ( e - m_zvStart ) * pxns, linepos.y + lineh ), 0x22DD8888 );
        draw->AddRect( ImVec2( wpos.x + ( s - m_zvStart ) * pxns, linepos.y ), ImVec2( wpos.x + ( e - m_zvStart ) * pxns, linepos.y + lineh ), 0x44DD8888 );

        ImGui::BeginTooltip();
        ImGui::Text( "%s", TimeToString( e - s ) );
        ImGui::EndTooltip();
    }
    else if( drawMouseLine )
    {
        auto& io = ImGui::GetIO();
        draw->AddLine( ImVec2( io.MousePos.x, linepos.y ), ImVec2( io.MousePos.x, linepos.y + lineh ), 0x33FFFFFF );
    }
}

int View::DrawZoneLevel( const Vector<ZoneEvent*>& vec, bool hover, double pxns, const ImVec2& wpos, int _offset, int depth )
{
    const auto delay = m_worker.GetDelay();
    const auto resolution = m_worker.GetResolution();
    // cast to uint64_t, so that unended zones (end = -1) are still drawn
    auto it = std::lower_bound( vec.begin(), vec.end(), m_zvStart - delay, [] ( const auto& l, const auto& r ) { return (uint64_t)l->end < (uint64_t)r; } );
    if( it == vec.end() ) return depth;

    const auto zitend = std::lower_bound( it, vec.end(), m_zvEnd + resolution, [] ( const auto& l, const auto& r ) { return l->start < r; } );
    if( it == zitend ) return depth;

    const auto w = ImGui::GetWindowContentRegionWidth() - 1;
    const auto ty = ImGui::GetFontSize();
    const auto ostep = ty + 1;
    const auto offset = _offset + ostep * depth;
    auto draw = ImGui::GetWindowDrawList();
    const auto dsz = delay * pxns;
    const auto rsz = resolution * pxns;

    depth++;
    int maxdepth = depth;

    while( it < zitend )
    {
        auto& ev = **it;
        auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );
        const auto color = GetZoneColor( ev );
        const auto end = m_worker.GetZoneEnd( ev );
        const auto zsz = std::max( ( end - ev.start ) * pxns, pxns * 0.5 );
        if( zsz < MinVisSize )
        {
            int num = 1;
            const auto px0 = ( ev.start - m_zvStart ) * pxns;
            auto px1 = ( end - m_zvStart ) * pxns;
            auto rend = end;
            for(;;)
            {
                ++it;
                if( it == zitend ) break;
                const auto nend = m_worker.GetZoneEnd( **it );
                const auto pxnext = ( nend - m_zvStart ) * pxns;
                if( pxnext - px1 >= MinVisSize * 2 ) break;
                px1 = pxnext;
                rend = nend;
                num++;
            }
            draw->AddRectFilled( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( std::max( px1, px0+MinVisSize ), double( w + 10 ) ), offset + ty ), color );
            if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( std::max( px1, px0+MinVisSize ), double( w + 10 ) ), offset + ty ) ) )
            {
                if( num > 1 )
                {
                    ImGui::BeginTooltip();
                    ImGui::Text( "Zones too small to display: %s", RealToString( num, true ) );
                    ImGui::Separator();
                    ImGui::Text( "Execution time: %s", TimeToString( rend - ev.start ) );
                    ImGui::EndTooltip();

                    if( ImGui::IsMouseClicked( 2 ) && rend - ev.start > 0 )
                    {
                        ZoomToRange( ev.start, rend );
                    }
                }
                else
                {
                    ZoneTooltip( ev );

                    if( ImGui::IsMouseClicked( 2 ) && rend - ev.start > 0 )
                    {
                        ZoomToZone( ev );
                    }
                    if( ImGui::IsMouseClicked( 0 ) )
                    {
                        m_zoneInfoWindow = &ev;
                        m_gpuInfoWindow = nullptr;
                    }
                }
            }
            char tmp[32];
            sprintf( tmp, "%i", num );
            const auto tsz = ImGui::CalcTextSize( tmp );
            if( tsz.x < px1 - px0 )
            {
                const auto x = px0 + ( px1 - px0 - tsz.x ) / 2;
                DrawTextContrast( draw, wpos + ImVec2( x, offset ), 0xFF4488DD, tmp );
            }
        }
        else
        {
            const char* zoneName;
            if( srcloc.name.active )
            {
                zoneName = m_worker.GetString( srcloc.name );
            }
            else
            {
                zoneName = m_worker.GetString( srcloc.function );
            }

            int dmul = ev.text.active ? 2 : 1;

            bool migration = false;
            if( m_lastCpu != ev.cpu_start )
            {
                if( m_lastCpu != -1 )
                {
                    migration = true;
                }
                m_lastCpu = ev.cpu_start;
            }

            if( !ev.child.empty() )
            {
                const auto d = DrawZoneLevel( ev.child, hover, pxns, wpos, _offset, depth );
                if( d > maxdepth ) maxdepth = d;
            }

            if( ev.end != -1 && m_lastCpu != ev.cpu_end )
            {
                m_lastCpu = ev.cpu_end;
                migration = true;
            }

            auto tsz = ImGui::CalcTextSize( zoneName );
            if( tsz.x > zsz )
            {
                zoneName = ShortenNamespace( zoneName );
                tsz = ImGui::CalcTextSize( zoneName );
            }

            const auto pr0 = ( ev.start - m_zvStart ) * pxns;
            const auto pr1 = ( end - m_zvStart ) * pxns;
            const auto px0 = std::max( pr0, -10.0 );
            const auto px1 = std::max( { std::min( pr1, double( w + 10 ) ), px0 + pxns * 0.5, px0 + MinVisSize } );
            draw->AddRectFilled( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y ), color );
            draw->AddRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y ), GetZoneHighlight( ev, migration ), 0.f, -1, GetZoneThickness( ev ) );
            if( dsz * dmul >= MinVisSize )
            {
                draw->AddRectFilled( wpos + ImVec2( pr0, offset ), wpos + ImVec2( std::min( pr0+dsz*dmul, pr1 ), offset + tsz.y ), 0x882222DD );
                draw->AddRectFilled( wpos + ImVec2( pr1, offset ), wpos + ImVec2( pr1+dsz, offset + tsz.y ), 0x882222DD );
            }
            if( rsz >= MinVisSize )
            {
                draw->AddLine( wpos + ImVec2( pr0 + rsz, offset + round( tsz.y/2 ) ), wpos + ImVec2( pr0 - rsz, offset + round( tsz.y/2 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr0 + rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr0 + rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr0 - rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr0 - rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );

                draw->AddLine( wpos + ImVec2( pr1 + rsz, offset + round( tsz.y/2 ) ), wpos + ImVec2( pr1 - rsz, offset + round( tsz.y/2 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr1 + rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr1 + rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr1 - rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr1 - rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );
            }
            if( tsz.x < zsz )
            {
                const auto x = ( ev.start - m_zvStart ) * pxns + ( ( end - ev.start ) * pxns - tsz.x ) / 2;
                if( x < 0 || x > w - tsz.x )
                {
                    ImGui::PushClipRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y * 2 ), true );
                    DrawTextContrast( draw, wpos + ImVec2( std::max( std::max( 0., px0 ), std::min( double( w - tsz.x ), x ) ), offset ), 0xFFFFFFFF, zoneName );
                    ImGui::PopClipRect();
                }
                else if( ev.start == ev.end )
                {
                    DrawTextContrast( draw, wpos + ImVec2( px0 + ( px1 - px0 - tsz.x ) * 0.5, offset ), 0xFFFFFFFF, zoneName );
                }
                else
                {
                    DrawTextContrast( draw, wpos + ImVec2( x, offset ), 0xFFFFFFFF, zoneName );
                }
            }
            else
            {
                ImGui::PushClipRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y * 2 ), true );
                DrawTextContrast( draw, wpos + ImVec2( ( ev.start - m_zvStart ) * pxns, offset ), 0xFFFFFFFF, zoneName );
                ImGui::PopClipRect();
            }

            if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y ) ) )
            {
                ZoneTooltip( ev );

                if( !m_zoomAnim.active && ImGui::IsMouseClicked( 2 ) )
                {
                    ZoomToZone( ev );
                }
                if( ImGui::IsMouseClicked( 0 ) )
                {
                    m_zoneInfoWindow = &ev;
                    m_gpuInfoWindow = nullptr;
                }
            }

            ++it;
        }
    }
    return maxdepth;
}

int View::DrawGpuZoneLevel( const Vector<GpuEvent*>& vec, bool hover, double pxns, const ImVec2& wpos, int _offset, int depth, uint64_t thread )
{
    const auto delay = m_worker.GetDelay();
    const auto resolution = m_worker.GetResolution();
    // cast to uint64_t, so that unended zones (end = -1) are still drawn
    auto it = std::lower_bound( vec.begin(), vec.end(), m_zvStart - delay, [] ( const auto& l, const auto& r ) { return (uint64_t)l->gpuEnd < (uint64_t)r; } );
    if( it == vec.end() ) return depth;

    const auto zitend = std::lower_bound( it, vec.end(), m_zvEnd + resolution, [] ( const auto& l, const auto& r ) { return l->gpuStart < r; } );
    if( it == zitend ) return depth;

    const auto w = ImGui::GetWindowContentRegionWidth() - 1;
    const auto ty = ImGui::GetFontSize();
    const auto ostep = ty + 1;
    const auto offset = _offset + ostep * depth;
    auto draw = ImGui::GetWindowDrawList();
    const auto dsz = delay * pxns;
    const auto rsz = resolution * pxns;

    depth++;
    int maxdepth = depth;

    while( it < zitend )
    {
        auto& ev = **it;
        auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );
        const auto color = GetZoneColor( ev );
        const auto end = m_worker.GetZoneEnd( ev );
        if( end == std::numeric_limits<int64_t>::max() ) break;
        const auto zsz = std::max( ( end - ev.gpuStart ) * pxns, pxns * 0.5 );
        if( zsz < MinVisSize )
        {
            int num = 1;
            const auto px0 = ( ev.gpuStart - m_zvStart ) * pxns;
            auto px1 = ( end - m_zvStart ) * pxns;
            auto rend = end;
            for(;;)
            {
                ++it;
                if( it == zitend ) break;
                const auto nend = m_worker.GetZoneEnd( **it );
                const auto pxnext = ( nend - m_zvStart ) * pxns;
                if( pxnext - px1 >= MinVisSize * 2 ) break;
                px1 = pxnext;
                rend = nend;
                num++;
            }
            draw->AddRectFilled( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( std::max( px1, px0+MinVisSize ), double( w + 10 ) ), offset + ty ), color );
            if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( std::max( px1, px0+MinVisSize ), double( w + 10 ) ), offset + ty ) ) )
            {
                if( num > 1 )
                {
                    ImGui::BeginTooltip();
                    ImGui::Text( "Zones too small to display: %s", RealToString( num, true ) );
                    ImGui::Separator();
                    ImGui::Text( "Execution time: %s", TimeToString( rend - ev.gpuStart ) );
                    ImGui::EndTooltip();

                    if( ImGui::IsMouseClicked( 2 ) && rend - ev.gpuStart > 0 )
                    {
                        ZoomToRange( ev.gpuStart, rend );
                    }
                }
                else
                {
                    ZoneTooltip( ev );

                    if( ImGui::IsMouseClicked( 2 ) && rend - ev.gpuStart > 0 )
                    {
                        ZoomToZone( ev );
                    }
                    if( ImGui::IsMouseClicked( 0 ) )
                    {
                        m_zoneInfoWindow = nullptr;
                        m_gpuInfoWindow = &ev;
                        m_gpuInfoWindowThread = thread;
                    }

                    m_gpuThread = thread;
                    m_gpuStart = ev.cpuStart;
                    m_gpuEnd = ev.cpuEnd;
                }
            }
            char tmp[32];
            sprintf( tmp, "%i", num );
            const auto tsz = ImGui::CalcTextSize( tmp );
            if( tsz.x < px1 - px0 )
            {
                const auto x = px0 + ( px1 - px0 - tsz.x ) / 2;
                DrawTextContrast( draw, wpos + ImVec2( x, offset ), 0xFF4488DD, tmp );
            }
        }
        else
        {
            if( !ev.child.empty() )
            {
                const auto d = DrawGpuZoneLevel( ev.child, hover, pxns, wpos, _offset, depth, thread );
                if( d > maxdepth ) maxdepth = d;
            }

            const char* zoneName = m_worker.GetString( srcloc.name );
            auto tsz = ImGui::CalcTextSize( zoneName );

            const auto pr0 = ( ev.gpuStart - m_zvStart ) * pxns;
            const auto pr1 = ( end - m_zvStart ) * pxns;
            const auto px0 = std::max( pr0, -10.0 );
            const auto px1 = std::max( { std::min( pr1, double( w + 10 ) ), px0 + pxns * 0.5, px0 + MinVisSize } );
            draw->AddRectFilled( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y ), color );
            draw->AddRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y ), GetZoneHighlight( ev ), 0.f, -1, GetZoneThickness( ev ) );
            if( dsz >= MinVisSize )
            {
                draw->AddRectFilled( wpos + ImVec2( pr0, offset ), wpos + ImVec2( std::min( pr0+dsz, pr1 ), offset + tsz.y ), 0x882222DD );
                draw->AddRectFilled( wpos + ImVec2( pr1, offset ), wpos + ImVec2( pr1+dsz, offset + tsz.y ), 0x882222DD );
            }
            if( rsz >= MinVisSize )
            {
                draw->AddLine( wpos + ImVec2( pr0 + rsz, offset + round( tsz.y/2 ) ), wpos + ImVec2( pr0 - rsz, offset + round( tsz.y/2 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr0 + rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr0 + rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr0 - rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr0 - rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );

                draw->AddLine( wpos + ImVec2( pr1 + rsz, offset + round( tsz.y/2 ) ), wpos + ImVec2( pr1 - rsz, offset + round( tsz.y/2 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr1 + rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr1 + rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( pr1 - rsz, offset + round( tsz.y/4 ) ), wpos + ImVec2( pr1 - rsz, offset + round( 3*tsz.y/4 ) ), 0xAAFFFFFF );
            }
            if( tsz.x < zsz )
            {
                const auto x = ( ev.gpuStart - m_zvStart ) * pxns + ( ( end - ev.gpuStart ) * pxns - tsz.x ) / 2;
                if( x < 0 || x > w - tsz.x )
                {
                    ImGui::PushClipRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y * 2 ), true );
                    DrawTextContrast( draw, wpos + ImVec2( std::max( std::max( 0., px0 ), std::min( double( w - tsz.x ), x ) ), offset ), 0xFFFFFFFF, zoneName );
                    ImGui::PopClipRect();
                }
                else if( ev.gpuStart == ev.gpuEnd )
                {
                    DrawTextContrast( draw, wpos + ImVec2( px0 + ( px1 - px0 - tsz.x ) * 0.5, offset ), 0xFFFFFFFF, zoneName );
                }
                else
                {
                    DrawTextContrast( draw, wpos + ImVec2( x, offset ), 0xFFFFFFFF, zoneName );
                }
            }
            else
            {
                ImGui::PushClipRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y * 2 ), true );
                DrawTextContrast( draw, wpos + ImVec2( ( ev.gpuStart - m_zvStart ) * pxns, offset ), 0xFFFFFFFF, zoneName );
                ImGui::PopClipRect();
            }

            if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( px0, offset ), wpos + ImVec2( px1, offset + tsz.y ) ) )
            {
                ZoneTooltip( ev );

                if( !m_zoomAnim.active && ImGui::IsMouseClicked( 2 ) )
                {
                    ZoomToZone( ev );
                }
                if( ImGui::IsMouseClicked( 0 ) )
                {
                    m_zoneInfoWindow = nullptr;
                    m_gpuInfoWindow = &ev;
                    m_gpuInfoWindowThread = thread;
                }

                m_gpuThread = thread;
                m_gpuStart = ev.cpuStart;
                m_gpuEnd = ev.cpuEnd;
            }

            ++it;
        }
    }
    return maxdepth;
}

static inline uint64_t GetThreadBit( uint8_t thread )
{
    return uint64_t( 1 ) << thread;
}

static inline bool IsThreadWaiting( uint64_t bitlist, uint64_t threadBit )
{
    return ( bitlist & threadBit ) != 0;
}

static inline bool AreOtherWaiting( uint64_t bitlist, uint64_t threadBit )
{
    return ( bitlist & ~threadBit ) != 0;
}

enum class LockState
{
    Nothing,
    HasLock,            // green
    HasBlockingLock,    // yellow
    WaitLock            // red
};

static Vector<LockEvent*>::const_iterator GetNextLockEvent( const Vector<LockEvent*>::const_iterator& it, const Vector<LockEvent*>::const_iterator& end, LockState& nextState, uint64_t threadBit )
{
    auto next = it;
    next++;

    switch( nextState )
    {
    case LockState::Nothing:
        while( next < end )
        {
            if( (*next)->lockCount != 0 )
            {
                if( GetThreadBit( (*next)->lockingThread ) == threadBit )
                {
                    nextState = AreOtherWaiting( (*next)->waitList, threadBit ) ? LockState::HasBlockingLock : LockState::HasLock;
                    break;
                }
                else if( IsThreadWaiting( (*next)->waitList, threadBit ) )
                {
                    nextState = LockState::WaitLock;
                    break;
                }
            }
            next++;
        }
        break;
    case LockState::HasLock:
        while( next < end )
        {
            if( (*next)->lockCount == 0 )
            {
                nextState = LockState::Nothing;
                break;
            }
            if( (*next)->waitList != 0 )
            {
                if( AreOtherWaiting( (*next)->waitList, threadBit ) )
                {
                    nextState = LockState::HasBlockingLock;
                }
                break;
            }
            if( (*next)->waitList != (*it)->waitList || (*next)->lockCount != (*it)->lockCount )
            {
                break;
            }
            next++;
        }
        break;
    case LockState::HasBlockingLock:
        while( next < end )
        {
            if( (*next)->lockCount == 0 )
            {
                nextState = LockState::Nothing;
                break;
            }
            if( (*next)->waitList != (*it)->waitList || (*next)->lockCount != (*it)->lockCount )
            {
                break;
            }
            next++;
        }
        break;
    case LockState::WaitLock:
        while( next < end )
        {
            if( GetThreadBit( (*next)->lockingThread ) == threadBit )
            {
                nextState = AreOtherWaiting( (*next)->waitList, threadBit ) ? LockState::HasBlockingLock : LockState::HasLock;
                break;
            }
            if( (*next)->lockingThread != (*it)->lockingThread )
            {
                break;
            }
            if( (*next)->lockCount == 0 )
            {
                break;
            }
            next++;
        }
        break;
    default:
        assert( false );
        break;
    }

    return next;
}

static Vector<LockEvent*>::const_iterator GetNextLockEventShared( const Vector<LockEvent*>::const_iterator& it, const Vector<LockEvent*>::const_iterator& end, LockState& nextState, uint64_t threadBit )
{
    const auto itptr = (const LockEventShared*)*it;
    auto next = it;
    next++;

    switch( nextState )
    {
    case LockState::Nothing:
        while( next < end )
        {
            const auto ptr = (const LockEventShared*)*next;
            if( ptr->lockCount != 0 )
            {
                const auto wait = ptr->waitList | ptr->waitShared;
                if( GetThreadBit( ptr->lockingThread ) == threadBit )
                {
                    nextState = AreOtherWaiting( wait, threadBit ) ? LockState::HasBlockingLock : LockState::HasLock;
                    break;
                }
                else if( IsThreadWaiting( wait, threadBit ) )
                {
                    nextState = LockState::WaitLock;
                    break;
                }
            }
            else if( IsThreadWaiting( ptr->sharedList, threadBit ) )
            {
                nextState = ( ptr->waitList != 0 ) ? LockState::HasBlockingLock : LockState::HasLock;
                break;
            }
            else if( ptr->sharedList != 0 && IsThreadWaiting( ptr->waitList, threadBit ) )
            {
                nextState = LockState::WaitLock;
                break;
            }
            next++;
        }
        break;
    case LockState::HasLock:
        while( next < end )
        {
            const auto ptr = (const LockEventShared*)*next;
            if( ptr->lockCount == 0 && !IsThreadWaiting( ptr->sharedList, threadBit ) )
            {
                nextState = LockState::Nothing;
                break;
            }
            if( ptr->waitList != 0 )
            {
                if( AreOtherWaiting( ptr->waitList, threadBit ) )
                {
                    nextState = LockState::HasBlockingLock;
                }
                break;
            }
            else if( !IsThreadWaiting( ptr->sharedList, threadBit ) && ptr->waitShared != 0 )
            {
                nextState = LockState::HasBlockingLock;
                break;
            }
            if( ptr->waitList != itptr->waitList || ptr->waitShared != itptr->waitShared || ptr->lockCount != itptr->lockCount || ptr->sharedList != itptr->sharedList )
            {
                break;
            }
            next++;
        }
        break;
    case LockState::HasBlockingLock:
        while( next < end )
        {
            const auto ptr = (const LockEventShared*)*next;
            if( ptr->lockCount == 0 && !IsThreadWaiting( ptr->sharedList, threadBit ) )
            {
                nextState = LockState::Nothing;
                break;
            }
            if( ptr->waitList != itptr->waitList || ptr->waitShared != itptr->waitShared || ptr->lockCount != itptr->lockCount || ptr->sharedList != itptr->sharedList )
            {
                break;
            }
            next++;
        }
        break;
    case LockState::WaitLock:
        while( next < end )
        {
            const auto ptr = (const LockEventShared*)*next;
            if( GetThreadBit( ptr->lockingThread ) == threadBit )
            {
                const auto wait = ptr->waitList | ptr->waitShared;
                nextState = AreOtherWaiting( wait, threadBit ) ? LockState::HasBlockingLock : LockState::HasLock;
                break;
            }
            if( IsThreadWaiting( ptr->sharedList, threadBit ) )
            {
                nextState = ( ptr->waitList != 0 ) ? LockState::HasBlockingLock : LockState::HasLock;
                break;
            }
            if( ptr->lockingThread != itptr->lockingThread )
            {
                break;
            }
            if( ptr->lockCount == 0 && !IsThreadWaiting( ptr->waitShared, threadBit ) )
            {
                break;
            }
            next++;
        }
        break;
    default:
        assert( false );
        break;
    }

    return next;
}

static LockState CombineLockState( LockState state, LockState next )
{
    return (LockState)std::max( (int)state, (int)next );
}

int View::DrawLocks( uint64_t tid, bool hover, double pxns, const ImVec2& wpos, int _offset, LockHighlight& highlight )
{
    const auto delay = m_worker.GetDelay();
    const auto resolution = m_worker.GetResolution();
    const auto w = ImGui::GetWindowContentRegionWidth();
    const auto ty = ImGui::GetFontSize();
    const auto ostep = ty + 1;
    auto draw = ImGui::GetWindowDrawList();
    const auto dsz = delay * pxns;
    const auto rsz = resolution * pxns;

    int cnt = 0;
    for( const auto& v : m_worker.GetLockMap() )
    {
        const auto& lockmap = v.second;
        if( !Visible( &lockmap ) || !lockmap.valid ) continue;

        auto it = lockmap.threadMap.find( tid );
        if( it == lockmap.threadMap.end() ) continue;

        const auto& tl = lockmap.timeline;
        assert( !tl.empty() );
        if( tl.back()->time < m_zvStart ) continue;

        auto GetNextLockFunc = lockmap.type == LockType::Lockable ? GetNextLockEvent : GetNextLockEventShared;

        const auto thread = it->second;
        const auto threadBit = GetThreadBit( thread );

        auto vbegin = std::lower_bound( tl.begin(), tl.end(), m_zvStart - delay, [] ( const auto& l, const auto& r ) { return l->time < r; } );
        const auto vend = std::lower_bound( vbegin, tl.end(), m_zvEnd + resolution, [] ( const auto& l, const auto& r ) { return l->time < r; } );

        if( vbegin > tl.begin() ) vbegin--;

        bool drawn = false;
        const auto& srcloc = m_worker.GetSourceLocation( lockmap.srcloc );
        const auto offset = _offset + ostep * cnt;

        LockState state = LockState::Nothing;
        if( lockmap.type == LockType::Lockable )
        {
            if( (*vbegin)->lockCount != 0 )
            {
                if( (*vbegin)->lockingThread == thread )
                {
                    state = AreOtherWaiting( (*vbegin)->waitList, threadBit ) ? LockState::HasBlockingLock : LockState::HasLock;
                }
                else if( IsThreadWaiting( (*vbegin)->waitList, threadBit ) )
                {
                    state = LockState::WaitLock;
                }
            }
        }
        else
        {
            const auto ptr = (LockEventShared*)*vbegin;
            if( ptr->lockCount != 0 )
            {
                if( ptr->lockingThread == thread )
                {
                    state = ( AreOtherWaiting( ptr->waitList, threadBit ) || AreOtherWaiting( ptr->waitShared, threadBit ) ) ? LockState::HasBlockingLock : LockState::HasLock;
                }
                else if( IsThreadWaiting( ptr->waitList, threadBit ) || IsThreadWaiting( ptr->waitShared, threadBit ) )
                {
                    state = LockState::WaitLock;
                }
            }
            else if( IsThreadWaiting( ptr->sharedList, threadBit ) )
            {
                state = ptr->waitList != 0 ? LockState::HasBlockingLock : LockState::HasLock;
            }
            else if( ptr->sharedList != 0 && IsThreadWaiting( ptr->waitList, threadBit ) )
            {
                state = LockState::WaitLock;
            }
        }

        double pxend = 0;
        for(;;)
        {
            while( vbegin < vend && ( state == LockState::Nothing || ( m_onlyContendedLocks && state == LockState::HasLock ) ) )
            {
                vbegin = GetNextLockFunc( vbegin, vend, state, threadBit );
            }
            if( vbegin >= vend ) break;

            assert( state != LockState::Nothing && ( !m_onlyContendedLocks || state != LockState::HasLock ) );
            drawn = true;

            LockState drawState = state;
            auto next = GetNextLockFunc( vbegin, vend, state, threadBit );

            const auto t0 = (*vbegin)->time;
            int64_t t1 = next == tl.end() ? m_lastTime : (*next)->time;
            const auto px0 = std::max( pxend, ( t0 - m_zvStart ) * pxns );
            auto tx0 = px0;
            double px1 = ( t1 - m_zvStart ) * pxns;
            uint64_t condensed = 0;

            for(;;)
            {
                if( next >= vend || px1 - tx0 > MinVisSize ) break;
                auto n = next;
                auto ns = state;
                while( n < vend && ( ns == LockState::Nothing || ( m_onlyContendedLocks && ns == LockState::HasLock ) ) )
                {
                    n = GetNextLockFunc( n, vend, ns, threadBit );
                }
                if( n >= vend ) break;
                if( n == next )
                {
                    n = GetNextLockFunc( n, vend, ns, threadBit );
                }
                drawState = CombineLockState( drawState, state );
                condensed++;
                const auto t2 = n == tl.end() ? m_lastTime : (*n)->time;
                const auto px2 = ( t2 - m_zvStart ) * pxns;
                if( px2 - px1 > MinVisSize ) break;
                if( drawState != ns && px2 - px0 > MinVisSize && !( ns == LockState::Nothing || ( m_onlyContendedLocks && ns == LockState::HasLock ) ) ) break;
                t1 = t2;
                tx0 = px1;
                px1 = px2;
                next = n;
                state = ns;
            }

            pxend = std::max( { px1, px0+MinVisSize, px0 + pxns * 0.5 } );

            bool itemHovered = hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( pxend, double( w + 10 ) ), offset + ty ) );
            if( itemHovered )
            {
                if( condensed > 1 )
                {
                    ImGui::BeginTooltip();
                    ImGui::Text( "Multiple lock events (%s)", RealToString( condensed, true ) );
                    ImGui::EndTooltip();
                }
                else
                {
                    highlight.blocked = drawState == LockState::HasBlockingLock;
                    if( !highlight.blocked )
                    {
                        highlight.id = v.first;
                        highlight.begin = t0;
                        highlight.end = t1;
                        highlight.thread = thread;
                        highlight.blocked = false;
                    }
                    else
                    {
                        auto b = vbegin;
                        while( b != tl.begin() )
                        {
                            if( (*b)->lockingThread != (*vbegin)->lockingThread )
                            {
                                break;
                            }
                            b--;
                        }
                        b++;
                        highlight.begin = (*b)->time;

                        auto e = next;
                        while( e != tl.end() )
                        {
                            if( (*e)->lockingThread != (*next)->lockingThread )
                            {
                                highlight.id = v.first;
                                highlight.end = (*e)->time;
                                highlight.thread = thread;
                                break;
                            }
                            e++;
                        }
                    }

                    ImGui::BeginTooltip();
                    ImGui::Text( "Lock #%" PRIu32 ": %s", v.first, m_worker.GetString( srcloc.function ) );
                    ImGui::Separator();
                    ImGui::Text( "%s:%i", m_worker.GetString( srcloc.file ), srcloc.line );
                    ImGui::Text( "Time: %s", TimeToString( t1 - t0 ) );
                    ImGui::Separator();

                    uint32_t markloc = 0;
                    auto it = vbegin;
                    for(;;)
                    {
                        if( (*it)->thread == thread )
                        {
                            if( ( (*it)->lockingThread == thread || IsThreadWaiting( (*it)->waitList, threadBit ) ) && (*it)->srcloc != 0 )
                            {
                                markloc = (*it)->srcloc;
                                break;
                            }
                        }
                        if( it == tl.begin() ) break;
                        --it;
                    }
                    if( markloc != 0 )
                    {
                        const auto& marklocdata = m_worker.GetSourceLocation( markloc );
                        ImGui::Text( "Lock event location:" );
                        ImGui::Text( "%s", m_worker.GetString( marklocdata.function ) );
                        ImGui::Text( "%s:%i", m_worker.GetString( marklocdata.file ), marklocdata.line );
                        ImGui::Separator();
                    }

                    if( v.second.type == LockType::Lockable )
                    {
                        switch( drawState )
                        {
                        case LockState::HasLock:
                            if( (*vbegin)->lockCount == 1 )
                            {
                                ImGui::Text( "Thread \"%s\" has lock. No other threads are waiting.", m_worker.GetThreadString( tid ) );
                            }
                            else
                            {
                                ImGui::Text( "Thread \"%s\" has %i locks. No other threads are waiting.", m_worker.GetThreadString( tid ), (*vbegin)->lockCount );
                            }
                            if( (*vbegin)->waitList != 0 )
                            {
                                assert( !AreOtherWaiting( (*next)->waitList, threadBit ) );
                                ImGui::Text( "Recursive lock acquire in thread." );
                            }
                            break;
                        case LockState::HasBlockingLock:
                        {
                            if( (*vbegin)->lockCount == 1 )
                            {
                                ImGui::Text( "Thread \"%s\" has lock. Blocked threads (%i):", m_worker.GetThreadString( tid ), TracyCountBits( (*vbegin)->waitList ) );
                            }
                            else
                            {
                                ImGui::Text( "Thread \"%s\" has %i locks. Blocked threads (%i):", m_worker.GetThreadString( tid ), (*vbegin)->lockCount, TracyCountBits( (*vbegin)->waitList ) );
                            }
                            auto waitList = (*vbegin)->waitList;
                            int t = 0;
                            ImGui::Indent( ty );
                            while( waitList != 0 )
                            {
                                if( waitList & 0x1 )
                                {
                                    ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[t] ) );
                                }
                                waitList >>= 1;
                                t++;
                            }
                            ImGui::Unindent( ty );
                            break;
                        }
                        case LockState::WaitLock:
                        {
                            if( (*vbegin)->lockCount > 0 )
                            {
                                ImGui::Text( "Thread \"%s\" is blocked by other thread:", m_worker.GetThreadString( tid ) );
                            }
                            else
                            {
                                ImGui::Text( "Thread \"%s\" waits to obtain lock after release by thread:", m_worker.GetThreadString( tid ) );
                            }
                            ImGui::Indent( ty );
                            ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[(*vbegin)->lockingThread] ) );
                            ImGui::Unindent( ty );
                            break;
                        }
                        default:
                            assert( false );
                            break;
                        }
                    }
                    else
                    {
                        const auto ptr = (const LockEventShared*)*vbegin;
                        switch( drawState )
                        {
                        case LockState::HasLock:
                            assert( ptr->waitList == 0 );
                            if( ptr->sharedList == 0 )
                            {
                                assert( ptr->lockCount == 1 );
                                ImGui::Text( "Thread \"%s\" has lock. No other threads are waiting.", m_worker.GetThreadString( tid ) );
                            }
                            else if( TracyCountBits( ptr->sharedList ) == 1 )
                            {
                                ImGui::Text( "Thread \"%s\" has a sole shared lock. No other threads are waiting.", m_worker.GetThreadString( tid ) );
                            }
                            else
                            {
                                ImGui::Text( "Thread \"%s\" has shared lock. No other threads are waiting.", m_worker.GetThreadString( tid ) );
                                ImGui::Text( "Threads sharing the lock (%i):", TracyCountBits( ptr->sharedList ) - 1 );
                                auto sharedList = ptr->sharedList;
                                int t = 0;
                                ImGui::Indent( ty );
                                while( sharedList != 0 )
                                {
                                    if( sharedList & 0x1 && t != thread )
                                    {
                                        ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[t] ) );
                                    }
                                    sharedList >>= 1;
                                    t++;
                                }
                                ImGui::Unindent( ty );
                            }
                            break;
                        case LockState::HasBlockingLock:
                        {
                            if( ptr->sharedList == 0 )
                            {
                                assert( ptr->lockCount == 1 );
                                ImGui::Text( "Thread \"%s\" has lock. Blocked threads (%i):", m_worker.GetThreadString( tid ), TracyCountBits( ptr->waitList ) + TracyCountBits( ptr->waitShared ) );
                            }
                            else if( TracyCountBits( ptr->sharedList ) == 1 )
                            {
                                ImGui::Text( "Thread \"%s\" has a sole shared lock. Blocked threads (%i):", m_worker.GetThreadString( tid ), TracyCountBits( ptr->waitList ) + TracyCountBits( ptr->waitShared ) );
                            }
                            else
                            {
                                ImGui::Text( "Thread \"%s\" has shared lock.", m_worker.GetThreadString( tid ) );
                                ImGui::Text( "Threads sharing the lock (%i):", TracyCountBits( ptr->sharedList ) - 1 );
                                auto sharedList = ptr->sharedList;
                                int t = 0;
                                ImGui::Indent( ty );
                                while( sharedList != 0 )
                                {
                                    if( sharedList & 0x1 && t != thread )
                                    {
                                        ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[t] ) );
                                    }
                                    sharedList >>= 1;
                                    t++;
                                }
                                ImGui::Unindent( ty );
                                ImGui::Text( "Blocked threads (%i):", TracyCountBits( ptr->waitList ) + TracyCountBits( ptr->waitShared ) );
                            }

                            auto waitList = ptr->waitList;
                            int t = 0;
                            ImGui::Indent( ty );
                            while( waitList != 0 )
                            {
                                if( waitList & 0x1 )
                                {
                                    ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[t] ) );
                                }
                                waitList >>= 1;
                                t++;
                            }
                            auto waitShared = ptr->waitShared;
                            t = 0;
                            while( waitShared != 0 )
                            {
                                if( waitShared & 0x1 )
                                {
                                    ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[t] ) );
                                }
                                waitShared >>= 1;
                                t++;
                            }
                            ImGui::Unindent( ty );
                            break;
                        }
                        case LockState::WaitLock:
                        {
                            assert( ptr->lockCount == 0 || ptr->lockCount == 1 );
                            if( ptr->lockCount != 0 || ptr->sharedList != 0 )
                            {
                                ImGui::Text( "Thread \"%s\" is blocked by other threads (%i):", m_worker.GetThreadString( tid ), ptr->lockCount + TracyCountBits( ptr->sharedList ) );
                            }
                            else
                            {
                                ImGui::Text( "Thread \"%s\" waits to obtain lock after release by thread:", m_worker.GetThreadString( tid ) );
                            }
                            ImGui::Indent( ty );
                            if( ptr->lockCount != 0 )
                            {
                                ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[ptr->lockingThread] ) );
                            }
                            auto sharedList = ptr->sharedList;
                            int t = 0;
                            while( sharedList != 0 )
                            {
                                if( sharedList & 0x1 )
                                {
                                    ImGui::Text( "\"%s\"", m_worker.GetThreadString( lockmap.threadList[t] ) );
                                }
                                sharedList >>= 1;
                                t++;
                            }
                            ImGui::Unindent( ty );
                            break;
                        }
                        default:
                            assert( false );
                            break;
                        }
                    }
                    ImGui::EndTooltip();
                }
            }

            const auto cfilled  = drawState == LockState::HasLock ? 0xFF228A22 : ( drawState == LockState::HasBlockingLock ? 0xFF228A8A : 0xFF2222BD );
            draw->AddRectFilled( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( pxend, double( w + 10 ) ), offset + ty ), cfilled );
            if( m_lockHighlight.thread != thread && ( drawState == LockState::HasBlockingLock ) != m_lockHighlight.blocked && next != tl.end() && m_lockHighlight.id == int64_t( v.first ) && m_lockHighlight.begin <= (*vbegin)->time && m_lockHighlight.end >= (*next)->time )
            {
                const auto t = uint8_t( ( sin( std::chrono::duration_cast<std::chrono::milliseconds>( std::chrono::system_clock::now().time_since_epoch() ).count() * 0.01 ) * 0.5 + 0.5 ) * 255 );
                draw->AddRect( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( pxend, double( w + 10 ) ), offset + ty ), 0x00FFFFFF | ( t << 24 ), 0.f, -1, 2.f );
            }
            else if( condensed == 0 )
            {
                const auto coutline = drawState == LockState::HasLock ? 0xFF3BA33B : ( drawState == LockState::HasBlockingLock ? 0xFF3BA3A3 : 0xFF3B3BD6 );
                draw->AddRect( wpos + ImVec2( std::max( px0, -10.0 ), offset ), wpos + ImVec2( std::min( pxend, double( w + 10 ) ), offset + ty ), coutline );
            }

            const auto rx0 = ( t0 - m_zvStart ) * pxns;
            if( dsz >= MinVisSize )
            {
                draw->AddRectFilled( wpos + ImVec2( rx0, offset ), wpos + ImVec2( std::min( rx0+dsz, px1 ), offset + ty ), 0x882222DD );
            }
            if( rsz >= MinVisSize )
            {
                draw->AddLine( wpos + ImVec2( rx0 + rsz, offset + round( ty/2 ) ), wpos + ImVec2( rx0 - rsz, offset + round( ty/2 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( rx0 + rsz, offset + round( ty/4 ) ), wpos + ImVec2( rx0 + rsz, offset + round( 3*ty/4 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( rx0 - rsz, offset + round( ty/4 ) ), wpos + ImVec2( rx0 - rsz, offset + round( 3*ty/4 ) ), 0xAAFFFFFF );

                draw->AddLine( wpos + ImVec2( px1 + rsz, offset + round( ty/2 ) ), wpos + ImVec2( px1 - rsz, offset + round( ty/2 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( px1 + rsz, offset + round( ty/4 ) ), wpos + ImVec2( px1 + rsz, offset + round( 3*ty/4 ) ), 0xAAFFFFFF );
                draw->AddLine( wpos + ImVec2( px1 - rsz, offset + round( ty/4 ) ), wpos + ImVec2( px1 - rsz, offset + round( 3*ty/4 ) ), 0xAAFFFFFF );
            }

            vbegin = next;
        }

        if( drawn )
        {
            char buf[1024];
            sprintf( buf, "%" PRIu32 ": %s", v.first, m_worker.GetString( srcloc.function ) );
            DrawTextContrast( draw, wpos + ImVec2( 0, offset ), 0xFF8888FF, buf );
            if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + ImGui::CalcTextSize( buf ).x, offset + ty ) ) )
            {
                ImGui::BeginTooltip();
                switch( v.second.type )
                {
                case LockType::Lockable:
                    ImGui::Text( "Type: lockable" );
                    break;
                case LockType::SharedLockable:
                    ImGui::Text( "Type: shared lockable" );
                    break;
                default:
                    assert( false );
                    break;
                }
                ImGui::Text( "Thread list:" );
                ImGui::Separator();
                ImGui::Indent( ty );
                for( const auto& t : v.second.threadList )
                {
                    ImGui::Text( "%s", m_worker.GetThreadString( t ) );
                }
                ImGui::Unindent( ty );
                ImGui::Separator();
                ImGui::Text( "Lock events: %s", RealToString( v.second.timeline.size(), true ) );
                ImGui::EndTooltip();
            }
            cnt++;
        }
    }
    return cnt;
}

enum { PlotHeight = 100 };

int View::DrawPlots( int offset, double pxns, const ImVec2& wpos, bool hover )
{
    enum { MaxPoints = 512 };
    float tmpvec[MaxPoints*2];

    const auto w = ImGui::GetWindowContentRegionWidth() - 1;
    const auto ty = ImGui::GetFontSize();
    auto draw = ImGui::GetWindowDrawList();
    const auto to = 9.f;
    const auto th = ( ty - to ) * sqrt( 3 ) * 0.5;
    const auto nspx = 1.0 / pxns;

    for( const auto& v : m_worker.GetPlots() )
    {
        if( !Visible( v ) ) continue;

        assert( !v->data.empty() );

        bool& showFull = ShowFull( v );
        if( showFull )
        {
            draw->AddTriangleFilled( wpos + ImVec2( to/2, offset + to/2 ), wpos + ImVec2( ty - to/2, offset + to/2 ), wpos + ImVec2( ty * 0.5, offset + to/2 + th ), 0xFF44DDDD );
        }
        else
        {
            draw->AddTriangle( wpos + ImVec2( to/2, offset + to/2 ), wpos + ImVec2( to/2, offset + ty - to/2 ), wpos + ImVec2( to/2 + th, offset + ty * 0.5 ), 0xFF226E6E );
        }
        const auto txt = m_worker.GetString( v->name );
        draw->AddText( wpos + ImVec2( ty, offset ), showFull ? 0xFF44DDDD : 0xFF226E6E, txt );
        draw->AddLine( wpos + ImVec2( 0, offset + ty - 1 ), wpos + ImVec2( w, offset + ty - 1 ), 0x8844DDDD );

        if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 0, offset ), wpos + ImVec2( ty + ImGui::CalcTextSize( txt ).x, offset + ty ) ) )
        {
            if( ImGui::IsMouseClicked( 0 ) )
            {
                showFull = !showFull;
            }

            const auto tr = v->data.back().time - v->data.front().time;

            ImGui::BeginTooltip();
            ImGui::Text( "Plot \"%s\"", txt );
            ImGui::Separator();
            ImGui::Text( "Data points: %s", RealToString( v->data.size(), true ) );
            ImGui::Text( "Data range: %s", RealToString( v->max - v->min, true ) );
            ImGui::Text( "Min value: %s", RealToString( v->min, true ) );
            ImGui::Text( "Max value: %s", RealToString( v->max, true ) );
            ImGui::Text( "Time range: %s", TimeToString( tr ) );
            ImGui::Text( "Data/second: %s", RealToString( double( v->data.size() ) / tr * 1000000000ll, true ) );

            const auto it = std::lower_bound( v->data.begin(), v->data.end(), v->data.back().time - 1000000000ll * 10, [] ( const auto& l, const auto& r ) { return l.time < r; } );
            const auto tr10 = v->data.back().time - it->time;
            if( tr10 != 0 )
            {
                ImGui::Text( "D/s (10s): %s", RealToString( double( std::distance( it, v->data.end() ) ) / tr10 * 1000000000ll, true ) );
            }

            ImGui::EndTooltip();
        }

        offset += ty;

        if( showFull )
        {
            const auto& vec = v->data;
            auto it = std::lower_bound( vec.begin(), vec.end(), m_zvStart - m_worker.GetDelay(), [] ( const auto& l, const auto& r ) { return l.time < r; } );
            auto end = std::lower_bound( it, vec.end(), m_zvEnd + m_worker.GetResolution(), [] ( const auto& l, const auto& r ) { return l.time < r; } );

            if( end != vec.end() ) end++;
            if( it != vec.begin() ) it--;

            double min = it->val;
            double max = it->val;
            if( std::distance( it, end ) > 1000000 )
            {
                min = v->min;
                max = v->max;
            }
            else
            {
                auto tmp = it;
                ++tmp;
                const auto sz = end - tmp;
                for( size_t i=0; i<sz; i++ )
                {
                    min = tmp[i].val < min ? tmp[i].val : min;
                    max = tmp[i].val > max ? tmp[i].val : max;
                }
                tmp += sz;
            }

            const auto revrange = 1.0 / ( max - min );

            if( it == vec.begin() )
            {
                const auto x = ( it->time - m_zvStart ) * pxns;
                const auto y = PlotHeight - ( it->val - min ) * revrange * PlotHeight;
                DrawPlotPoint( wpos, x, y, offset, 0xFF44DDDD, hover, false, it->val, 0, false );
            }

            auto prevx = it;
            auto prevy = it;
            ++it;
            ptrdiff_t skip = 0;
            while( it < end )
            {
                const auto x0 = ( prevx->time - m_zvStart ) * pxns;
                const auto x1 = ( it->time - m_zvStart ) * pxns;
                const auto y0 = PlotHeight - ( prevy->val - min ) * revrange * PlotHeight;
                const auto y1 = PlotHeight - ( it->val - min ) * revrange * PlotHeight;

                draw->AddLine( wpos + ImVec2( x0, offset + y0 ), wpos + ImVec2( x1, offset + y1 ), 0xFF44DDDD );

                const auto rx = skip == 0 ? 2.0 : ( skip == 1 ? 2.5 : 4.0 );

                auto range = std::upper_bound( it, end, int64_t( it->time + nspx * rx ), [] ( const auto& l, const auto& r ) { return l < r.time; } );
                assert( range > it );
                const auto rsz = std::distance( it, range );
                if( rsz == 1 )
                {
                    DrawPlotPoint( wpos, x1, y1, offset, 0xFF44DDDD, hover, true, it->val, prevy->val, false );
                    prevx = it;
                    prevy = it;
                    ++it;
                }
                else
                {
                    prevx = it;

                    skip = rsz / MaxPoints;
                    const auto skip1 = std::max<ptrdiff_t>( 1, skip );
                    const auto sz = rsz / skip1 + 1;
                    assert( sz <= MaxPoints*2 );

                    auto dst = tmpvec;
                    for(;;)
                    {
                        *dst++ = float( it->val );
                        if( std::distance( it, range ) > skip1 )
                        {
                            it += skip1;
                        }
                        else
                        {
                            break;
                        }
                    }
                    pdqsort_branchless( tmpvec, dst );

                    draw->AddLine( wpos + ImVec2( x1, offset + PlotHeight - ( tmpvec[0] - min ) * revrange * PlotHeight ), wpos + ImVec2( x1, offset + PlotHeight - ( dst[-1] - min ) * revrange * PlotHeight ), 0xFF44DDDD );

                    auto vit = tmpvec;
                    while( vit != dst )
                    {
                        auto vrange = std::upper_bound( vit, dst, *vit + 3.0 / ( revrange * PlotHeight ), [] ( const auto& l, const auto& r ) { return l < r; } );
                        assert( vrange > vit );
                        if( std::distance( vit, vrange ) == 1 )
                        {
                            DrawPlotPoint( wpos, x1, PlotHeight - ( *vit - min ) * revrange * PlotHeight, offset, 0xFF44DDDD, hover, false, *vit, 0, false );
                        }
                        else
                        {
                            DrawPlotPoint( wpos, x1, PlotHeight - ( *vit - min ) * revrange * PlotHeight, offset, 0xFF44DDDD, hover, false, *vit, 0, true );
                        }
                        vit = vrange;
                    }

                    prevy = it - 1;
                }
            }

            char tmp[64];
            sprintf( tmp, "%s", RealToString( max, true ) );
            DrawTextContrast( draw, wpos + ImVec2( 0, offset ), 0x8844DDDD, tmp );
            offset += PlotHeight - ty;
            sprintf( tmp, "%s", RealToString( min, true ) );
            DrawTextContrast( draw, wpos + ImVec2( 0, offset ), 0x8844DDDD, tmp );

            draw->AddLine( wpos + ImVec2( 0, offset + ty - 1 ), wpos + ImVec2( w, offset + ty - 1 ), 0x8844DDDD );
            offset += ty;
        }
        offset += 0.2 * ty;
    }

    return offset;
}

void View::DrawPlotPoint( const ImVec2& wpos, float x, float y, int offset, uint32_t color, bool hover, bool hasPrev, double val, double prev, bool merged )
{
    auto draw = ImGui::GetWindowDrawList();
    if( merged )
    {
        draw->AddRectFilled( wpos + ImVec2( x - 1.5f, offset + y - 1.5f ), wpos + ImVec2( x + 2.5f, offset + y + 2.5f ), color );
    }
    else
    {
        draw->AddRect( wpos + ImVec2( x - 1.5f, offset + y - 1.5f ), wpos + ImVec2( x + 2.5f, offset + y + 2.5f ), color );
    }

    if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( x - 2, offset ), wpos + ImVec2( x + 2, offset + PlotHeight ) ) )
    {
        ImGui::BeginTooltip();
        ImGui::Text( "Value: %s", RealToString( val, true ) );
        if( hasPrev )
        {
            ImGui::Text( "Change: %s", RealToString( val - prev, true ) );
        }
        ImGui::EndTooltip();
    }
}

void View::DrawInfoWindow()
{
    if( m_zoneInfoWindow )
    {
        DrawZoneInfoWindow();
    }
    else if( m_gpuInfoWindow )
    {
        DrawGpuInfoWindow();
    }
}

void View::DrawZoneInfoWindow()
{
    auto& ev = *m_zoneInfoWindow;
    int dmul = 1;

    bool show = true;
    ImGui::Begin( "Zone info", &show );

    if( ImGui::Button( "Zoom to zone" ) )
    {
        ZoomToZone( ev );
    }
    ImGui::SameLine();
    if( ImGui::Button( "Go to parent" ) )
    {
        auto parent = GetZoneParent( ev );
        if( parent )
        {
            m_zoneInfoWindow = parent;
        }
    }

    ImGui::Separator();

    const auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );
    if( srcloc.name.active )
    {
        ImGui::Text( "Zone name: %s", m_worker.GetString( srcloc.name ) );
    }
    ImGui::Text( "Function: %s", m_worker.GetString( srcloc.function ) );
    ImGui::Text( "Location: %s:%i", m_worker.GetString( srcloc.file ), srcloc.line );
    if( ev.text.active )
    {
        ImGui::Text( "User text: %s", m_worker.GetString( ev.text ) );
        dmul++;
    }

    ImGui::Separator();

    const auto end = m_worker.GetZoneEnd( ev );
    const auto ztime = end - ev.start;
    ImGui::Text( "Time from start of program: %s", TimeToString( ev.start - m_worker.GetFrameBegin( 0 ) ) );
    ImGui::Text( "Execution time: %s", TimeToString( ztime ) );
    ImGui::Text( "Without profiling: %s", TimeToString( ztime - m_worker.GetDelay() * dmul ) );

    auto ctt = std::make_unique<uint64_t[]>( ev.child.size() );
    auto cti = std::make_unique<uint32_t[]>( ev.child.size() );
    uint64_t ctime = 0;
    for( size_t i=0; i<ev.child.size(); i++ )
    {
        const auto cend = m_worker.GetZoneEnd( *ev.child[i] );
        const auto ct = cend - ev.child[i]->start;
        ctime += ct;
        ctt[i] = ct;
        cti[i] = uint32_t( i );
    }

    std::sort( cti.get(), cti.get() + ev.child.size(), [&ctt] ( const auto& lhs, const auto& rhs ) { return ctt[lhs] > ctt[rhs]; } );

    if( !ev.child.empty() )
    {
        const auto ty = ImGui::GetTextLineHeight();
        ImGui::Columns( 2 );
        ImGui::Separator();
        ImGui::Text( "Child zones: %s", RealToString( ev.child.size(), true ) );
        ImGui::NextColumn();
        ImGui::Text( "Exclusive time: %s (%.2f%%)", TimeToString( ztime - ctime ), double( ztime - ctime ) / ztime * 100 );
        ImGui::NextColumn();
        ImGui::Separator();
        for( size_t i=0; i<ev.child.size(); i++ )
        {
            auto& cev = *ev.child[cti[i]];
            const auto& csl = m_worker.GetSourceLocation( cev.srcloc );
            if( csl.name.active )
            {
                ImGui::Text( "%s", m_worker.GetString( csl.name ) );
            }
            else
            {
                ImGui::Text( "%s", m_worker.GetString( csl.function ) );
            }
            if( ImGui::IsItemHovered() )
            {
                m_zoneHighlight = &cev;
                if( ImGui::IsMouseClicked( 0 ) )
                {
                    m_zoneInfoWindow = &cev;
                }
                if( ImGui::IsMouseClicked( 2 ) )
                {
                    ZoomToZone( cev );
                }
                ZoneTooltip( cev );
            }
            ImGui::NextColumn();
            const auto part = double( ctt[cti[i]] ) / ztime;
            char buf[128];
            sprintf( buf, "%s (%.2f%%)", TimeToString( ctt[cti[i]] ), part * 100 );
            ImGui::ProgressBar( part, ImVec2( -1, ty ), buf );
            ImGui::NextColumn();
        }
        ImGui::EndColumns();
    }

    ImGui::End();

    if( !show ) m_zoneInfoWindow = nullptr;
}

void View::DrawGpuInfoWindow()
{
    auto& ev = *m_gpuInfoWindow;

    bool show = true;
    ImGui::Begin( "Zone info", &show );

    if( ImGui::Button( "Zoom to zone" ) )
    {
        ZoomToZone( ev );
    }
    ImGui::SameLine();
    if( ImGui::Button( "Go to parent" ) )
    {
        auto parent = GetZoneParent( ev );
        if( parent )
        {
            m_gpuInfoWindow = parent;
        }
    }

    ImGui::Separator();

    const auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );
    ImGui::Text( "Zone name: %s", m_worker.GetString( srcloc.name ) );
    ImGui::Text( "Function: %s", m_worker.GetString( srcloc.function ) );
    ImGui::Text( "Location: %s:%i", m_worker.GetString( srcloc.file ), srcloc.line );

    ImGui::Separator();

    const auto end = m_worker.GetZoneEnd( ev );
    const auto ztime = end - ev.gpuStart;
    ImGui::Text( "Time from start of program: %s", TimeToString( ev.gpuStart - m_worker.GetFrameBegin( 0 ) ) );
    ImGui::Text( "GPU execution time: %s", TimeToString( ztime ) );
    ImGui::Text( "CPU command setup time: %s", TimeToString( ev.cpuEnd - ev.cpuStart ) );
    ImGui::Text( "Delay to execution: %s", TimeToString( ev.gpuStart - ev.cpuStart ) );

    auto ctt = std::make_unique<uint64_t[]>( ev.child.size() );
    auto cti = std::make_unique<uint32_t[]>( ev.child.size() );
    uint64_t ctime = 0;
    for( size_t i=0; i<ev.child.size(); i++ )
    {
        const auto cend = m_worker.GetZoneEnd( *ev.child[i] );
        const auto ct = cend - ev.child[i]->gpuStart;
        ctime += ct;
        ctt[i] = ct;
        cti[i] = uint32_t( i );
    }

    std::sort( cti.get(), cti.get() + ev.child.size(), [&ctt] ( const auto& lhs, const auto& rhs ) { return ctt[lhs] > ctt[rhs]; } );

    if( !ev.child.empty() )
    {
        const auto ty = ImGui::GetTextLineHeight();
        ImGui::Columns( 2 );
        ImGui::Separator();
        ImGui::Text( "Child zones: %s", RealToString( ev.child.size(), true ) );
        ImGui::NextColumn();
        ImGui::Text( "Exclusive time: %s (%.2f%%)", TimeToString( ztime - ctime ), double( ztime - ctime ) / ztime * 100 );
        ImGui::NextColumn();
        ImGui::Separator();
        for( size_t i=0; i<ev.child.size(); i++ )
        {
            auto& cev = *ev.child[cti[i]];
            const auto& csl = m_worker.GetSourceLocation( cev.srcloc );
            ImGui::Text( "%s", m_worker.GetString( csl.name ) );
            if( ImGui::IsItemHovered() )
            {
                m_gpuHighlight = &cev;
                if( ImGui::IsMouseClicked( 0 ) )
                {
                    m_gpuInfoWindow = &cev;
                }
                if( ImGui::IsMouseClicked( 2 ) )
                {
                    ZoomToZone( cev );
                }
                ZoneTooltip( cev );
            }
            ImGui::NextColumn();
            const auto part = double( ctt[cti[i]] ) / ztime;
            char buf[128];
            sprintf( buf, "%s (%.2f%%)", TimeToString( ctt[cti[i]] ), part * 100 );
            ImGui::ProgressBar( part, ImVec2( -1, ty ), buf );
            ImGui::NextColumn();
        }
        ImGui::EndColumns();
    }

    ImGui::End();

    if( !show ) m_gpuInfoWindow = nullptr;
}

void View::DrawOptions()
{
    const auto tw = ImGui::GetFontSize();
    ImGui::Begin( "Options", &m_showOptions, ImGuiWindowFlags_AlwaysAutoResize );
    ImGui::Checkbox( "Draw GPU zones", &m_drawGpuZones );
    ImGui::Indent( tw );
    for( size_t i=0; i<m_worker.GetGpuData().size(); i++ )
    {
        char buf[1024];
        sprintf( buf, "GPU context %zu", i );
        ImGui::Checkbox( buf, &Visible( m_worker.GetGpuData()[i] ) );
    }
    ImGui::Unindent( tw );
    ImGui::Checkbox( "Draw CPU zones", &m_drawZones );
    int ns = (int)m_namespace;
    ImGui::Combo( "Namespaces", &ns, "Full\0Shortened\0None\0" );
    m_namespace = (Namespace)ns;
    ImGui::Separator();
    ImGui::Checkbox( "Draw locks", &m_drawLocks );
    ImGui::SameLine();
    ImGui::Checkbox( "Only contended", &m_onlyContendedLocks );
    ImGui::Indent( tw );
    for( const auto& l : m_worker.GetLockMap() )
    {
        if( l.second.valid )
        {
            char buf[1024];
            sprintf( buf, "%" PRIu32 ": %s", l.first, m_worker.GetString( m_worker.GetSourceLocation( l.second.srcloc ).function ) );
            ImGui::Checkbox( buf, &Visible( &l.second ) );
        }
    }
    ImGui::Unindent( tw );
    ImGui::Separator();
    ImGui::Checkbox( "Draw plots", &m_drawPlots );
    ImGui::Indent( tw );
    for( const auto& p : m_worker.GetPlots() )
    {
        ImGui::Checkbox( m_worker.GetString( p->name ), &Visible( p ) );
    }
    ImGui::Unindent( tw );
    ImGui::Separator();
    ImGui::Text( "Visible threads:" );
    ImGui::Indent( tw );
    for( const auto& t : m_worker.GetThreadData() )
    {
        ImGui::Checkbox( m_worker.GetThreadString( t->id ), &Visible( t ) );
    }
    ImGui::Unindent( tw );
    ImGui::End();
}

void View::DrawMessages()
{
    ImGui::Begin( "Messages", &m_showMessages );
    for( const auto& v : m_worker.GetMessages() )
    {
        char tmp[64 * 1024];
        sprintf( tmp, "%10s | %s", TimeToString( v->time - m_worker.GetFrameBegin( 0 ) ), m_worker.GetString( v->ref ) );
        if( m_msgHighlight == v )
        {
            ImGui::TextColored( ImVec4( 0xDD / 255.f, 0x22 / 255.f, 0x22 / 255.f, 1.f ), "%s", tmp );
        }
        else
        {
            ImGui::Text( "%s", tmp );
        }
        if( ImGui::IsItemClicked() )
        {
            m_pause = true;
            const auto hr = std::max<uint64_t>( 1, ( m_zvEnd - m_zvStart ) / 2 );
            ZoomToRange( v->time - hr, v->time + hr );
        }
    }
    ImGui::End();
}

void View::DrawFindZone()
{
    ImGui::Begin( "Find Zone", &m_findZone.show );
    ImGui::InputText( "", m_findZone.pattern, 1024 );
    ImGui::SameLine();

    const bool findClicked = ImGui::Button( "Find" );
    ImGui::SameLine();

    if( ImGui::Button( "Clear" ) )
    {
        m_findZone.result.clear();
    }

    if( ImGui::TreeNode( "Options" ) )
    {
        ImGui::InputInt( "max zones per thread", &m_findZone.maxZonesPerThread );
        ImGui::SameLine();
        DrawHelpMarker( "-1 for unlimited.\nHigh value or unlimited zone search may lead to performance issues." );
        ImGui::InputInt( "max depth", &m_findZone.maxDepth );
        ImGui::SameLine();
        DrawHelpMarker( "-1 for unlimited." );
        ImGui::TreePop();
    }

    if( findClicked )
    {
        m_findZone.result.clear();
        FindZones();
    }

    if( !m_findZone.result.empty() )
    {
        ImGui::Separator();

        if( ImGui::TreeNode( "Histogram" ) )
        {
            const auto ty = ImGui::GetFontSize();

            int64_t tmin = std::numeric_limits<int64_t>::max();
            int64_t tmax = std::numeric_limits<int64_t>::min();

            for( auto& v : m_findZone.result )
            {
                for( auto& ev : v->timeline )
                {
                    const auto timeSpan = m_worker.GetZoneEnd( *ev ) - ev->start;
                    tmin = std::min( tmin, timeSpan );
                    tmax = std::max( tmax, timeSpan );
                }
            }

            ImGui::Checkbox( "Log values", &m_findZone.logVal );
            ImGui::SameLine();
            ImGui::Checkbox( "Log time", &m_findZone.logTime );

            ImGui::Text( "Time range: %s - %s", TimeToString( tmin ), TimeToString( tmax ) );

            const auto dt = double( tmax - tmin );

            if( dt > 0 )
            {
                const auto w = ImGui::GetContentRegionAvail().x;

                const auto numBins = int64_t( w - 4 );
                if( numBins > 1 )
                {
                    auto bins = std::make_unique<uint64_t[]>( numBins );
                    memset( bins.get(), 0, sizeof( uint64_t ) * numBins );

                    auto binTime = std::make_unique<int64_t[]>( numBins );
                    memset( binTime.get(), 0, sizeof( int64_t ) * numBins );

                    if( m_findZone.logTime )
                    {
                        const auto tMinLog = log10( tmin );
                        const auto idt = numBins / ( log10( tmax ) - tMinLog );
                        for( auto& v : m_findZone.result )
                        {
                            for( auto& ev : v->timeline )
                            {
                                const auto timeSpan = m_worker.GetZoneEnd( *ev ) - ev->start;
                                const auto bin = std::min( numBins - 1, int64_t( ( log10( timeSpan ) - tMinLog ) * idt ) );
                                bins[bin]++;
                                binTime[bin] += timeSpan;
                            }
                        }
                    }
                    else
                    {
                        const auto idt = numBins / dt;
                        for( auto& v : m_findZone.result )
                        {
                            for( auto& ev : v->timeline )
                            {
                                const auto timeSpan = m_worker.GetZoneEnd( *ev ) - ev->start;
                                const auto bin = std::min( numBins - 1, int64_t( ( timeSpan - tmin ) * idt ) );
                                bins[bin]++;
                                binTime[bin] += timeSpan;
                            }
                        }
                    }

                    int64_t timeTotal = binTime[0];
                    auto maxVal = bins[0];
                    for( int i=1; i<numBins; i++ )
                    {
                        maxVal = std::max( maxVal, bins[i] );
                        timeTotal += binTime[i];
                    }

                    ImGui::Text( "Total time: %s", TimeToString( timeTotal ) );
                    ImGui::Text( "Max counts: %s", RealToString( maxVal, true ) );

                    enum { Height = 200 };
                    const auto wpos = ImGui::GetCursorScreenPos();

                    ImGui::InvisibleButton( "##histogram", ImVec2( w, Height + round( ty * 1.5 ) ) );
                    const bool hover = ImGui::IsItemHovered();

                    auto draw = ImGui::GetWindowDrawList();
                    draw->AddRectFilled( wpos, wpos + ImVec2( w, Height ), 0x22FFFFFF );
                    draw->AddRect( wpos, wpos + ImVec2( w, Height ), 0x88FFFFFF );

                    if( m_findZone.logVal )
                    {
                        const auto hAdj = double( Height - 4 ) / log10( maxVal + 1 );
                        for( int i=0; i<numBins; i++ )
                        {
                            if( bins[i] > 0 )
                            {
                                draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - log10( bins[i] + 1 ) * hAdj ), 0xFF22DDDD );
                            }
                        }
                    }
                    else
                    {
                        const auto hAdj = double( Height - 4 ) / maxVal;
                        for( int i=0; i<numBins; i++ )
                        {
                            if( bins[i] > 0 )
                            {
                                draw->AddLine( wpos + ImVec2( 2+i, Height-3 ), wpos + ImVec2( 2+i, Height-3 - bins[i] * hAdj ), 0xFF22DDDD );
                            }
                        }
                    }

                    const auto xoff = 2;
                    const auto yoff = Height + 1;

                    if( m_findZone.logTime )
                    {
                        const auto ltmin = log10( tmin );
                        const auto ltmax = log10( tmax );
                        const auto start = int( floor( ltmin ) );
                        const auto end = int( ceil( ltmax ) );

                        const auto range = ltmax - ltmin;
                        const auto step = w / range;
                        auto offset = start - ltmin;
                        int tw = 0;
                        int tx = 0;

                        auto tt = int64_t( pow( 10, start ) );

                        static const double logticks[] = { log10( 2 ), log10( 3 ), log10( 4 ), log10( 5 ), log10( 6 ), log10( 7 ), log10( 8 ), log10( 9 ) };

                        for( int i=start; i<=end; i++ )
                        {
                            const auto x = ( i - start + offset ) * step;

                            if( x >= 0 )
                            {
                                draw->AddLine( wpos + ImVec2( x, yoff ), wpos + ImVec2( x, yoff + round( ty * 0.5 ) ), 0x66FFFFFF );
                                if( tw == 0 || x > tx + tw + ty * 1.1 )
                                {
                                    tx = x;
                                    auto txt = TimeToStringInteger( tt );
                                    draw->AddText( wpos + ImVec2( x, yoff + round( ty * 0.5 ) ), 0x66FFFFFF, txt );
                                    tw = ImGui::CalcTextSize( txt ).x;
                                }
                            }

                            for( int j=0; j<8; j++ )
                            {
                                const auto xoff = x + logticks[j] * step;
                                if( xoff >= 0 )
                                {
                                    draw->AddLine( wpos + ImVec2( xoff, yoff ), wpos + ImVec2( xoff, yoff + round( ty * 0.25 ) ), 0x66FFFFFF );
                                }
                            }

                            tt *= 10;
                        }
                    }
                    else
                    {
                        const auto pxns = numBins / dt;
                        const auto nspx = 1.0 / pxns;
                        const auto scale = std::max( 0.0, round( log10( nspx ) + 2 ) );
                        const auto step = pow( 10, scale );

                        const auto dx = step * pxns;
                        double x = 0;
                        int tw = 0;
                        int tx = 0;

                        const auto sstep = step / 10.0;
                        const auto sdx = dx / 10.0;

                        static const double linelen[] = { 0.5, 0.25, 0.25, 0.25, 0.25, 0.375, 0.25, 0.25, 0.25, 0.25 };

                        int64_t tt = int64_t( ceil( tmin / sstep ) * sstep );
                        const auto diff = tmin / sstep - int64_t( tmin / sstep );
                        const auto xo = ( diff == 0 ? 0 : ( ( 1 - diff ) * sstep * pxns ) ) + xoff;
                        int iter = int( ceil( ( tmin - int64_t( tmin / step ) * step ) / sstep ) );

                        while( x < numBins )
                        {
                            draw->AddLine( wpos + ImVec2( xo + x, yoff ), wpos + ImVec2( xo + x, yoff + round( ty * linelen[iter] ) ), 0x66FFFFFF );
                            if( iter == 0 && ( tw == 0 || x > tx + tw + ty * 2 ) )
                            {
                                tx = x;
                                auto txt = TimeToStringInteger( tt );
                                draw->AddText( wpos + ImVec2( xo + x, yoff + round( ty * 0.5 ) ), 0x66FFFFFF, txt );
                                tw = ImGui::CalcTextSize( txt ).x;
                            }

                            iter = ( iter + 1 ) % 10;
                            x += sdx;
                            tt += sstep;
                        }
                    }

                    if( hover && ImGui::IsMouseHoveringRect( wpos + ImVec2( 2, 2 ), wpos + ImVec2( w-2, Height + round( ty * 1.5 ) ) ) )
                    {
                        auto& io = ImGui::GetIO();
                        draw->AddLine( ImVec2( io.MousePos.x, wpos.y ), ImVec2( io.MousePos.x, wpos.y+Height-2 ), 0x33FFFFFF );

                        const auto bin = double( io.MousePos.x - wpos.x - 2 );
                        int64_t t0, t1;
                        if( m_findZone.logTime )
                        {
                            t0 = int64_t( pow( 10, log10( tmin ) +  bin    / numBins * ( log10( tmax ) - log10( tmin ) ) ) );
                            t1 = int64_t( pow( 10, log10( tmin ) + (bin+1) / numBins * ( log10( tmax ) - log10( tmin ) ) ) );
                        }
                        else
                        {
                            t0 = int64_t( tmin +  bin    / numBins * ( tmax - tmin ) );
                            t1 = int64_t( tmin + (bin+1) / numBins * ( tmax - tmin ) );
                        }

                        int64_t tBefore = 0;
                        for( int i=0; i<bin; i++ )
                        {
                            tBefore += binTime[i];
                        }

                        int64_t tAfter = 0;
                        for( int i=bin+1; i<numBins; i++ )
                        {
                            tAfter += binTime[i];
                        }

                        ImGui::BeginTooltip();
                        ImGui::Text( "Time range: %s - %s", TimeToString( t0 ), TimeToString( t1 ) );
                        ImGui::Text( "Count: %" PRIu64, bins[bin] );
                        ImGui::Text( "Time spent in bin: %s", TimeToString( binTime[bin] ) );
                        ImGui::Text( "Time spent in the left bins: %s", TimeToString( tBefore ) );
                        ImGui::Text( "Time spent in the right bins: %s", TimeToString( tAfter ) );
                        ImGui::EndTooltip();
                    }
                }
            }

            ImGui::TreePop();
        }

        ImGui::Separator();
        for( auto& v : m_findZone.result )
        {
            const bool expand = ImGui::TreeNode( m_worker.GetThreadString( v->id ) );
            ImGui::SameLine();
            ImGui::TextColored( ImVec4( 0.5f, 0.5f, 0.5f, 1.0f ), "(%s)", RealToString( v->timeline.size(), true ) );

            if( expand )
            {
                ImGui::Columns( 3, m_worker.GetThreadString( v->id ) );
                ImGui::Separator();
                ImGui::Text( "Name" );
                ImGui::NextColumn();
                ImGui::Text( "Time from start" );
                ImGui::NextColumn();
                ImGui::Text( "Execution time" );
                ImGui::NextColumn();
                ImGui::Separator();

                for( auto& ev : v->timeline )
                {
                    ImGui::PushID( ev );

                    auto& srcloc = m_worker.GetSourceLocation( ev->srcloc );
                    if( ImGui::Selectable( m_worker.GetString( srcloc.name.active ? srcloc.name : srcloc.function ), m_zoneInfoWindow == ev, ImGuiSelectableFlags_SpanAllColumns ) )
                    {
                        m_zoneInfoWindow = ev;
                    }

                    ImGui::NextColumn();

                    ImGui::Text( TimeToString( ev->start - m_worker.GetFrameBegin( 0 ) ) );
                    ImGui::NextColumn();
                    const auto end = m_worker.GetZoneEnd( *ev );
                    ImGui::Text( TimeToString( end - ev->start ) );
                    ImGui::NextColumn();

                    ImGui::PopID();
                }
                ImGui::Columns( 1 );
                ImGui::Separator();
                ImGui::TreePop();
            }
        }
    }

    ImGui::End();
}

uint32_t View::GetZoneColor( const ZoneEvent& ev )
{
    const auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );
    const auto color = srcloc.color;
    return color != 0 ? ( color | 0xFF000000 ) : 0xFFCC5555;
}

uint32_t View::GetZoneColor( const GpuEvent& ev )
{
    const auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );
    const auto color = srcloc.color;
    return color != 0 ? ( color | 0xFF000000 ) : 0xFF222288;
}

uint32_t View::GetZoneHighlight( const ZoneEvent& ev, bool migration )
{
    if( m_zoneInfoWindow == &ev )
    {
        return 0xFF44DD44;
    }
    else if( m_zoneHighlight == &ev )
    {
        return 0xFF4444FF;
    }
    else if( migration )
    {
        return 0xFFDD22DD;
    }
    else
    {
        const auto color = GetZoneColor( ev );
        return 0xFF000000 |
            ( std::min<int>( 0xFF, ( ( ( color & 0x00FF0000 ) >> 16 ) + 25 ) ) << 16 ) |
            ( std::min<int>( 0xFF, ( ( ( color & 0x0000FF00 ) >> 8  ) + 25 ) ) << 8  ) |
            ( std::min<int>( 0xFF, ( ( ( color & 0x000000FF )       ) + 25 ) )       );
    }
}

uint32_t View::GetZoneHighlight( const GpuEvent& ev )
{
    if( m_gpuInfoWindow == &ev )
    {
        return 0xFF44DD44;
    }
    else if( m_gpuHighlight == &ev )
    {
        return 0xFF4444FF;
    }
    else
    {
        const auto color = GetZoneColor( ev );
        return 0xFF000000 |
            ( std::min<int>( 0xFF, ( ( ( color & 0x00FF0000 ) >> 16 ) + 25 ) ) << 16 ) |
            ( std::min<int>( 0xFF, ( ( ( color & 0x0000FF00 ) >> 8  ) + 25 ) ) << 8  ) |
            ( std::min<int>( 0xFF, ( ( ( color & 0x000000FF )       ) + 25 ) )       );
    }
}

float View::GetZoneThickness( const ZoneEvent& ev )
{
    if( m_zoneInfoWindow == &ev || m_zoneHighlight == &ev )
    {
        return 3.f;
    }
    else
    {
        return 1.f;
    }
}

float View::GetZoneThickness( const GpuEvent& ev )
{
    if( m_gpuInfoWindow == &ev || m_gpuHighlight == &ev )
    {
        return 3.f;
    }
    else
    {
        return 1.f;
    }
}

void View::ZoomToZone( const ZoneEvent& ev )
{
    const auto end = m_worker.GetZoneEnd( ev );
    if( end - ev.start <= 0 ) return;
    ZoomToRange( ev.start, end );
}

void View::ZoomToZone( const GpuEvent& ev )
{
    const auto end = m_worker.GetZoneEnd( ev );
    if( end - ev.gpuStart <= 0 ) return;
    ZoomToRange( ev.gpuStart, end );
}

void View::ZoomToRange( int64_t start, int64_t end )
{
    m_pause = true;
    m_zoomAnim.active = true;
    m_zoomAnim.start0 = m_zvStart;
    m_zoomAnim.start1 = start;
    m_zoomAnim.end0 = m_zvEnd;
    m_zoomAnim.end1 = end;
    m_zoomAnim.progress = 0;

    const auto d0 = double( m_zoomAnim.end0 - m_zoomAnim.start0 );
    const auto d1 = double( m_zoomAnim.end1 - m_zoomAnim.start1 );
    const auto diff = d0>d1 ? d0/d1 : d1/d0;
    m_zoomAnim.lenMod = 10.0 / log10( diff );
}

void View::ZoneTooltip( const ZoneEvent& ev )
{
    int dmul = ev.text.active ? 2 : 1;

    auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );

    const auto filename = m_worker.GetString( srcloc.file );
    const auto line = srcloc.line;

    const char* func;
    const char* zoneName;
    if( srcloc.name.active )
    {
        zoneName = m_worker.GetString( srcloc.name );
        func = m_worker.GetString( srcloc.function );
    }
    else
    {
        func = zoneName = m_worker.GetString( srcloc.function );
    }

    const auto end = m_worker.GetZoneEnd( ev );

    ImGui::BeginTooltip();
    if( srcloc.name.active )
    {
        ImGui::Text( "%s", zoneName );
        ImGui::Text( "%s", func );
    }
    else
    {
        ImGui::Text( "%s", func );
    }
    ImGui::Separator();
    ImGui::Text( "%s:%i", filename, line );
    ImGui::Text( "Execution time: %s", TimeToString( end - ev.start ) );
    ImGui::Text( "Without profiling: %s", TimeToString( end - ev.start - m_worker.GetDelay() * dmul ) );
    if( ev.cpu_start != -1 )
    {
        if( ev.end == -1 || ev.cpu_start == ev.cpu_end )
        {
            ImGui::Text( "CPU: %i", ev.cpu_start );
        }
        else
        {
            ImGui::Text( "CPU: %i -> %i", ev.cpu_start, ev.cpu_end );
        }
    }
    if( ev.text.active )
    {
        ImGui::NewLine();
        ImGui::TextColored( ImVec4( 0xCC / 255.f, 0xCC / 255.f, 0x22 / 255.f, 1.f ), "%s", m_worker.GetString( ev.text ) );
    }
    ImGui::EndTooltip();
}

void View::ZoneTooltip( const GpuEvent& ev )
{
    const auto& srcloc = m_worker.GetSourceLocation( ev.srcloc );

    const auto name = m_worker.GetString( srcloc.name );
    const auto filename = m_worker.GetString( srcloc.file );
    const auto line = srcloc.line;
    const auto func = m_worker.GetString( srcloc.function );

    const auto end = m_worker.GetZoneEnd( ev );

    ImGui::BeginTooltip();
    ImGui::Text( "%s", name );
    ImGui::Text( "%s", func );
    ImGui::Separator();
    ImGui::Text( "%s:%i", filename, line );
    ImGui::Text( "GPU execution time: %s", TimeToString( end - ev.gpuStart ) );
    ImGui::Text( "CPU command setup time: %s", TimeToString( ev.cpuEnd - ev.cpuStart ) );
    ImGui::Text( "Delay to execution: %s", TimeToString( ev.gpuStart - ev.cpuStart ) );

    ImGui::EndTooltip();
}

const ZoneEvent* View::GetZoneParent( const ZoneEvent& zone ) const
{
    for( const auto& thread : m_worker.GetThreadData() )
    {
        const ZoneEvent* parent = nullptr;
        const Vector<ZoneEvent*>* timeline = &thread->timeline;
        if( timeline->empty() ) continue;
        for(;;)
        {
            auto it = std::upper_bound( timeline->begin(), timeline->end(), zone.start, [] ( const auto& l, const auto& r ) { return l < r->start; } );
            if( it != timeline->begin() ) --it;
            if( zone.end != -1 && (*it)->start > zone.end ) break;
            if( *it == &zone ) return parent;
            if( (*it)->child.empty() ) break;
            parent = *it;
            timeline = &parent->child;
        }
    }
    return nullptr;
}

const GpuEvent* View::GetZoneParent( const GpuEvent& zone ) const
{
    for( const auto& ctx : m_worker.GetGpuData() )
    {
        const GpuEvent* parent = nullptr;
        const Vector<GpuEvent*>* timeline = &ctx->timeline;
        if( timeline->empty() ) continue;
        for(;;)
        {
            auto it = std::upper_bound( timeline->begin(), timeline->end(), zone.gpuStart, [] ( const auto& l, const auto& r ) { return l < r->gpuStart; } );
            if( it != timeline->begin() ) --it;
            if( zone.gpuEnd != -1 && (*it)->gpuStart > zone.gpuEnd ) break;
            if( *it == &zone ) return parent;
            if( (*it)->child.empty() ) break;
            parent = *it;
            timeline = &parent->child;
        }
    }
    return nullptr;
}

void View::FindZones()
{
    const auto match = m_worker.GetMatchingSourceLocation( m_findZone.pattern );
    if( match.empty() ) return;

    for( const auto& v : m_worker.GetThreadData() )
    {
        auto thrOut = std::make_unique<ThreadData>();
        FindZones( v->timeline, thrOut->timeline, match, m_findZone.maxDepth );

        if( !thrOut->timeline.empty() )
        {
            thrOut->id = v->id;
            m_findZone.result.push_back( std::move( thrOut ) );
        }
    }
}

void View::FindZones( const Vector<ZoneEvent*>& events, Vector<ZoneEvent*>& out, const std::vector<int32_t>& match, const int maxdepth )
{
    for( auto& ev : events )
    {
        if( out.size() >= m_findZone.maxZonesPerThread ) break;
        if( m_worker.GetZoneEnd( *ev ) == ev->start ) continue;

        if( std::find( match.begin(), match.end(), ev->srcloc ) != match.end() )
        {
            out.push_back( ev );
        }

        if( maxdepth != 0 )
        {
            FindZones( ev->child, out, match, maxdepth - 1 );
        }
    }
}

}