3d_cache.cpp

Go to the documentation of this file.

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015-2016 Cirilo Bernardo <[email protected]>
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 * Copyright (C) 2022 CERN
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#define GLM_FORCE_RADIANS
 
#include <mutex>
#include <utility>
 
#include <wx/datetime.h>
#include <wx/dir.h>
#include <wx/log.h>
#include <wx/stdpaths.h>
 
#include "3d_cache.h"
#include "3d_info.h"
#include "3d_plugin_manager.h"
#include "model_substitution_helpers.h"
#include "sg/scenegraph.h"
#include "plugins/3dapi/ifsg_api.h"
 
#include <advanced_config.h>
#include <common.h>     // For ExpandEnvVarSubstitutions
#include <filename_resolver.h>
#include <mmh3_hash.h>
#include <paths.h>
#include <pgm_base.h>
#include <project.h>
#include <settings/common_settings.h>
#include <settings/settings_manager.h>
#include <wx_filename.h>
 
 
#define MASK_3D_CACHE "3D_CACHE"
 
static std::mutex mutex3D_cache;
 
 
static bool checkTag( const char* aTag, void* aPluginMgrPtr )
{
    if( nullptr == aTag || nullptr == aPluginMgrPtr )
        return false;
 
    S3D_PLUGIN_MANAGER *pp = (S3D_PLUGIN_MANAGER*) aPluginMgrPtr;
 
    return pp->CheckTag( aTag );
}
 
 
class S3D_CACHE_ENTRY
{
public:
    S3D_CACHE_ENTRY();
    ~S3D_CACHE_ENTRY();
 
    void SetHash( const HASH_128& aHash );
    const wxString GetCacheBaseName();
 
    wxDateTime    modTime;      // file modification time
    HASH_128      m_hash;
    std::string   pluginInfo;   // PluginName:Version string
    SCENEGRAPH*   sceneData;
    S3DMODEL*     renderData;
 
private:
    // prohibit assignment and default copy constructor
    S3D_CACHE_ENTRY( const S3D_CACHE_ENTRY& source ) = delete;
    S3D_CACHE_ENTRY& operator=( const S3D_CACHE_ENTRY& source ) = delete;
 
    wxString m_CacheBaseName;  // base name of cache file
};
 
 
S3D_CACHE_ENTRY::S3D_CACHE_ENTRY()
{
    sceneData = nullptr;
    renderData = nullptr;
    m_hash.Clear();
}
 
 
S3D_CACHE_ENTRY::~S3D_CACHE_ENTRY()
{
    delete sceneData;
 
    if( nullptr != renderData )
        S3D::Destroy3DModel( &renderData );
}
 
 
void S3D_CACHE_ENTRY::SetHash( const HASH_128& aHash )
{
    m_hash = aHash;
}
 
 
const wxString S3D_CACHE_ENTRY::GetCacheBaseName()
{
    if( m_CacheBaseName.empty() )
        m_CacheBaseName = m_hash.ToString();
 
    return m_CacheBaseName;
}
 
 
S3D_CACHE::S3D_CACHE()
{
    m_FNResolver = new FILENAME_RESOLVER;
    m_project = nullptr;
    m_Plugins = new S3D_PLUGIN_MANAGER;
}
 
 
S3D_CACHE::~S3D_CACHE()
{
    FlushCache();
 
    delete m_FNResolver;
    delete m_Plugins;
}
 
 
SCENEGRAPH* S3D_CACHE::load( const wxString& aModelFile, const wxString& aBasePath,
                             S3D_CACHE_ENTRY** aCachePtr,
                             std::vector<const EMBEDDED_FILES*> aEmbeddedFilesStack,
                             S3DMODEL** aRenderModel )
{
    if( aCachePtr )
        *aCachePtr = nullptr;
 
    if( aRenderModel )
        *aRenderModel = nullptr;
 
    wxString full3Dpath = m_FNResolver->ResolvePath( aModelFile, aBasePath, std::move( aEmbeddedFilesStack ) );
 
    // In CLI / scripting contexts, transparently substitute a matching
    // STEP model for a missing WRL reference so renders and exports
    // don't silently lose geometry.  The GUI handles this via the
    // DIALOG_MIGRATE_3D_MODELS load-time auto-migration, so we skip the
    // fallback there to avoid masking user-visible "missing" state.
    if( full3Dpath.empty() && !Pgm().IsGUI() && MODEL_SUBSTITUTION::IsWrlExtension( aModelFile ) )
    {
        std::lock_guard<std::mutex> catLock( m_substCatalogMutex );
 
        if( !m_substCatalogBuilt )
        {
            const wxString projectPath =
                    m_project ? m_project->GetProjectPath() : wxString();
            m_substCatalog.Build( projectPath, m_FNResolver );
            m_substCatalogBuilt = true;
        }
 
        const wxString subst = m_substCatalog.FindMatchFor( aModelFile );
 
        if( !subst.IsEmpty() )
        {
            wxLogTrace( MASK_3D_CACHE,
                        wxT( "%s:%s:%d\n * [3D model] substituting '%s' -> '%s'\n" ),
                        __FILE__, __FUNCTION__, __LINE__, aModelFile, subst );
            full3Dpath = subst;
        }
    }
 
    if( full3Dpath.empty() )
    {
        // the model cannot be found; we cannot proceed
        wxLogTrace( MASK_3D_CACHE, wxT( "%s:%s:%d\n * [3D model] could not find model '%s'\n" ),
                    __FILE__, __FUNCTION__, __LINE__, aModelFile );
        return nullptr;
    }
 
    // check cache if file is already loaded
    std::lock_guard<std::mutex> lock( mutex3D_cache );
 
    auto finishEntry = [&]( S3D_CACHE_ENTRY* ep ) -> SCENEGRAPH*
    {
        if( !ep )
            return nullptr;
 
        if( aCachePtr )
            *aCachePtr = ep;
 
        // Lazy renderData conversion under the same lock that owns the entry.
        if( aRenderModel )
        {
            if( !ep->renderData && ep->sceneData )
                ep->renderData = S3D::GetModel( ep->sceneData );
 
            *aRenderModel = ep->renderData;
        }
 
        return ep->sceneData;
    };
 
    std::map< wxString, S3D_CACHE_ENTRY*, rsort_wxString >::iterator mi;
    mi = m_CacheMap.find( full3Dpath );
 
    if( mi != m_CacheMap.end() )
    {
        wxFileName fname( full3Dpath );
 
        if( fname.FileExists() )    // Only check if file exists. If not, it will
        {                           // use the same model in cache.
            bool       reload = ADVANCED_CFG::GetCfg().m_Skip3DModelMemoryCache;
            wxDateTime fmdate = fname.GetModificationTime();
 
            if( fmdate != mi->second->modTime )
            {
                HASH_128 hashSum;
                getHash( full3Dpath, hashSum );
                mi->second->modTime = fmdate;
 
                if( hashSum != mi->second->m_hash )
                {
                    mi->second->SetHash( hashSum );
                    reload = true;
                }
            }
 
            if( reload )
            {
                if( nullptr != mi->second->sceneData )
                {
                    S3D::DestroyNode( mi->second->sceneData );
                    mi->second->sceneData = nullptr;
                }
 
                if( nullptr != mi->second->renderData )
                    S3D::Destroy3DModel( &mi->second->renderData );
 
                mi->second->sceneData = m_Plugins->Load3DModel( full3Dpath,
                                                                mi->second->pluginInfo );
            }
        }
 
        return finishEntry( mi->second );
    }
 
    // a cache item does not exist; search the Filename->Cachename map
    S3D_CACHE_ENTRY* ep = nullptr;
    checkCache( full3Dpath, &ep );
    return finishEntry( ep );
}
 
 
SCENEGRAPH* S3D_CACHE::Load( const wxString& aModelFile, const wxString& aBasePath,
                             std::vector<const EMBEDDED_FILES*> aEmbeddedFilesStack )
{
    return load( aModelFile, aBasePath, nullptr, std::move( aEmbeddedFilesStack ) );
}
 
 
SCENEGRAPH* S3D_CACHE::checkCache( const wxString& aFileName, S3D_CACHE_ENTRY** aCachePtr )
{
    if( aCachePtr )
        *aCachePtr = nullptr;
 
    HASH_128    hashSum;
    S3D_CACHE_ENTRY* ep = new S3D_CACHE_ENTRY;
    m_CacheList.push_back( ep );
    wxFileName fname( aFileName );
    ep->modTime = fname.GetModificationTime();
 
    if( !getHash( aFileName, hashSum ) || m_CacheDir.empty() )
    {
        // just in case we can't get a hash digest (for example, on access issues)
        // or we do not have a configured cache file directory, we create an
        // entry to prevent further attempts at loading the file
 
        if( m_CacheMap.emplace( aFileName, ep ).second == false )
        {
            wxLogTrace( MASK_3D_CACHE,
                        wxT( "%s:%s:%d\n * [BUG] duplicate entry in map file; key = '%s'" ),
                        __FILE__, __FUNCTION__, __LINE__, aFileName );
 
            m_CacheList.pop_back();
            delete ep;
        }
        else
        {
            if( aCachePtr )
                *aCachePtr = ep;
        }
 
        return nullptr;
    }
 
    if( m_CacheMap.emplace( aFileName, ep ).second == false )
    {
        wxLogTrace( MASK_3D_CACHE,
                    wxT( "%s:%s:%d\n * [BUG] duplicate entry in map file; key = '%s'" ),
                    __FILE__, __FUNCTION__, __LINE__, aFileName );
 
        m_CacheList.pop_back();
        delete ep;
        return nullptr;
    }
 
    if( aCachePtr )
        *aCachePtr = ep;
 
    ep->SetHash( hashSum );
 
    wxString bname = ep->GetCacheBaseName();
    wxString cachename = m_CacheDir + bname + wxT( ".3dc" );
 
    if( !ADVANCED_CFG::GetCfg().m_Skip3DModelFileCache && wxFileName::FileExists( cachename )
        && loadCacheData( ep ) )
        return ep->sceneData;
 
    ep->sceneData = m_Plugins->Load3DModel( aFileName, ep->pluginInfo );
 
    if( !ADVANCED_CFG::GetCfg().m_Skip3DModelFileCache && nullptr != ep->sceneData )
        saveCacheData( ep );
 
    return ep->sceneData;
}
 
 
bool S3D_CACHE::getHash( const wxString& aFileName, HASH_128& aHash )
{
    if( aFileName.empty() )
    {
        wxLogTrace( MASK_3D_CACHE, wxT( "%s:%s:%d\n * [BUG] empty filename" ),
                    __FILE__, __FUNCTION__, __LINE__ );
 
        return false;
    }
 
#ifdef _WIN32
    FILE* fp = _wfopen( aFileName.wc_str(), L"rb" );
#else
    FILE* fp = fopen( aFileName.ToUTF8(), "rb" );
#endif
 
    if( nullptr == fp )
        return false;
 
    MMH3_HASH dblock( 0xA1B2C3D4 );
    std::vector<char> block( 4096 );
    size_t bsize = 0;
 
    while( ( bsize = fread( block.data(), 1, 4096, fp ) ) > 0 )
        dblock.add( block );
 
    fclose( fp );
    aHash = dblock.digest();
    return true;
}
 
 
bool S3D_CACHE::loadCacheData( S3D_CACHE_ENTRY* aCacheItem )
{
    wxString bname = aCacheItem->GetCacheBaseName();
 
    if( bname.empty() )
    {
        wxLogTrace( MASK_3D_CACHE,
                    wxT( " * [3D model] cannot load cached model; no file hash available" ) );
 
        return false;
    }
 
    if( m_CacheDir.empty() )
    {
        wxLogTrace( MASK_3D_CACHE,
                    wxT( " * [3D model] cannot load cached model; config directory unknown" ) );
 
        return false;
    }
 
    wxString fname = m_CacheDir + bname + wxT( ".3dc" );
 
    if( !wxFileName::FileExists( fname ) )
    {
        wxLogTrace( MASK_3D_CACHE, wxT( " * [3D model] cannot open file '%s'" ), fname.GetData() );
        return false;
    }
 
    if( nullptr != aCacheItem->sceneData )
        S3D::DestroyNode( (SGNODE*) aCacheItem->sceneData );
 
    aCacheItem->sceneData = (SCENEGRAPH*)S3D::ReadCache( fname.ToUTF8(), m_Plugins, checkTag );
 
    if( nullptr == aCacheItem->sceneData )
        return false;
 
    return true;
}
 
 
bool S3D_CACHE::saveCacheData( S3D_CACHE_ENTRY* aCacheItem )
{
    if( nullptr == aCacheItem )
    {
        wxLogTrace( MASK_3D_CACHE, wxT( "%s:%s:%d\n * NULL passed for aCacheItem" ),
                    __FILE__, __FUNCTION__, __LINE__ );
 
        return false;
    }
 
    if( nullptr == aCacheItem->sceneData )
    {
        wxLogTrace( MASK_3D_CACHE, wxT( "%s:%s:%d\n * aCacheItem has no valid scene data" ),
                    __FILE__, __FUNCTION__, __LINE__ );
 
        return false;
    }
 
    wxString bname = aCacheItem->GetCacheBaseName();
 
    if( bname.empty() )
    {
        wxLogTrace( MASK_3D_CACHE,
                    wxT( " * [3D model] cannot load cached model; no file hash available" ) );
 
        return false;
    }
 
    if( m_CacheDir.empty() )
    {
        wxLogTrace( MASK_3D_CACHE,
                    wxT( " * [3D model] cannot load cached model; config directory unknown" ) );
 
        return false;
    }
 
    wxString fname = m_CacheDir + bname + wxT( ".3dc" );
 
    if( wxFileName::Exists( fname ) )
    {
        if( !wxFileName::FileExists( fname ) )
        {
            wxLogTrace( MASK_3D_CACHE,
                        wxT( " * [3D model] path exists but is not a regular file '%s'" ), fname );
 
            return false;
        }
    }
 
    return S3D::WriteCache( fname.ToUTF8(), true, (SGNODE*)aCacheItem->sceneData,
                            aCacheItem->pluginInfo.c_str() );
}
 
 
bool S3D_CACHE::Set3DConfigDir( const wxString& aConfigDir )
{
    if( !m_ConfigDir.empty() )
        return false;
 
    wxFileName cfgdir( ExpandEnvVarSubstitutions( aConfigDir, m_project ), wxEmptyString );
 
    cfgdir.Normalize( FN_NORMALIZE_FLAGS );
 
    if( !cfgdir.DirExists() )
    {
        cfgdir.Mkdir( wxS_DIR_DEFAULT, wxPATH_MKDIR_FULL );
 
        if( !cfgdir.DirExists() )
        {
            wxLogTrace( MASK_3D_CACHE,
                        wxT( "%s:%s:%d\n * failed to create 3D configuration directory '%s'" ),
                        __FILE__, __FUNCTION__, __LINE__, cfgdir.GetPath() );
 
            return false;
        }
    }
 
    m_ConfigDir = cfgdir.GetPath();
 
    // inform the file resolver of the config directory
    if( !m_FNResolver->Set3DConfigDir( m_ConfigDir ) )
    {
        wxLogTrace( MASK_3D_CACHE,
                    wxT( "%s:%s:%d\n * could not set 3D Config Directory on filename resolver\n"
                         " * config directory: '%s'" ),
                    __FILE__, __FUNCTION__, __LINE__, m_ConfigDir );
    }
 
    // 3D cache data must go to a user's cache directory;
    // unfortunately wxWidgets doesn't seem to provide
    // functions to retrieve such a directory.
    //
    // 1. OSX: ~/Library/Caches/kicad/3d/
    // 2. Linux: ${XDG_CACHE_HOME}/kicad/3d ~/.cache/kicad/3d/
    // 3. MSWin: AppData\Local\kicad\3d
    wxFileName cacheDir;
    cacheDir.AssignDir( PATHS::GetUserCachePath() );
    cacheDir.AppendDir( wxT( "3d" ) );
 
    if( !cacheDir.DirExists() )
    {
        cacheDir.Mkdir( wxS_DIR_DEFAULT, wxPATH_MKDIR_FULL );
 
        if( !cacheDir.DirExists() )
        {
            wxLogTrace( MASK_3D_CACHE,
                        wxT( "%s:%s:%d\n * failed to create 3D cache directory '%s'" ),
                        __FILE__, __FUNCTION__, __LINE__, cacheDir.GetPath() );
 
            return false;
        }
    }
 
    m_CacheDir = cacheDir.GetPathWithSep();
    return true;
}
 
 
bool S3D_CACHE::SetProject( PROJECT* aProject )
{
    m_project = aProject;
 
    bool hasChanged = false;
 
    if( m_FNResolver->SetProject( aProject, &hasChanged ) && hasChanged )
    {
        std::lock_guard<std::mutex> lock( mutex3D_cache );
 
        m_CacheMap.clear();
 
        std::list< S3D_CACHE_ENTRY* >::iterator sL = m_CacheList.begin();
        std::list< S3D_CACHE_ENTRY* >::iterator eL = m_CacheList.end();
 
        while( sL != eL )
        {
            delete *sL;
            ++sL;
        }
 
        m_CacheList.clear();
 
        return true;
    }
 
    return false;
}
 
 
void S3D_CACHE::SetProgramBase( PGM_BASE* aBase )
{
    m_FNResolver->SetProgramBase( aBase );
}
 
 
FILENAME_RESOLVER* S3D_CACHE::GetResolver() noexcept
{
    return m_FNResolver;
}
 
 
std::list< wxString > const* S3D_CACHE::GetFileFilters() const
{
    return m_Plugins->GetFileFilters();
}
 
 
void S3D_CACHE::FlushCache( bool closePlugins )
{
    std::lock_guard<std::mutex> lock( mutex3D_cache );
 
    std::list< S3D_CACHE_ENTRY* >::iterator sCL = m_CacheList.begin();
    std::list< S3D_CACHE_ENTRY* >::iterator eCL = m_CacheList.end();
 
    while( sCL != eCL )
    {
        delete *sCL;
        ++sCL;
    }
 
    m_CacheList.clear();
    m_CacheMap.clear();
 
    if( closePlugins )
        ClosePlugins();
}
 
 
void S3D_CACHE::ClosePlugins()
{
    if( m_Plugins )
        m_Plugins->ClosePlugins();
}
 
 
S3DMODEL* S3D_CACHE::GetModel( const wxString& aModelFileName, const wxString& aBasePath,
                               std::vector<const EMBEDDED_FILES*> aEmbeddedFilesStack )
{
    S3DMODEL* mp = nullptr;
 
    if( !load( aModelFileName, aBasePath, nullptr, std::move( aEmbeddedFilesStack ), &mp ) )
        return nullptr;
 
    return mp;
}
 
void S3D_CACHE::CleanCacheDir( int aNumDaysOld )
{
    wxDir         dir;
    wxString      fileSpec = wxT( "*.3dc" );
    wxArrayString fileList; // Holds list of ".3dc" files found in cache directory
    size_t        numFilesFound = 0;
 
    wxFileName thisFile;
    wxDateTime lastAccess, thresholdDate;
    wxDateSpan durationInDays;
 
    // Calc the threshold date above which we delete cache files
    durationInDays.SetDays( aNumDaysOld );
    thresholdDate = wxDateTime::Now() - durationInDays;
 
    // If the cache directory can be found and opened, then we'll try and clean it up
    if( dir.Open( m_CacheDir ) )
    {
        thisFile.SetPath( m_CacheDir ); // Set the base path to the cache folder
 
        // Get a list of all the ".3dc" files in the cache directory
        numFilesFound = dir.GetAllFiles( m_CacheDir, &fileList, fileSpec );
 
        for( unsigned int i = 0; i < numFilesFound; i++ )
        {
            // Completes path to specific file so we can get its "last access" date
            thisFile.SetFullName( fileList[i] );
 
            // Only get "last access" time to compare against. Don't need the other 2 timestamps.
            if( thisFile.GetTimes( &lastAccess, nullptr, nullptr ) )
            {
                if( lastAccess.IsEarlierThan( thresholdDate ) )
                {
                    // This file is older than the threshold so delete it
                    wxRemoveFile( thisFile.GetFullPath() );
                }
            }
        }
    }
}