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Diffstat (limited to 'thirdparty/assimp/code/BaseImporter.cpp')
| -rw-r--r-- | thirdparty/assimp/code/BaseImporter.cpp | 616 |
1 files changed, 616 insertions, 0 deletions
diff --git a/thirdparty/assimp/code/BaseImporter.cpp b/thirdparty/assimp/code/BaseImporter.cpp new file mode 100644 index 0000000000..4803c6d6f2 --- /dev/null +++ b/thirdparty/assimp/code/BaseImporter.cpp @@ -0,0 +1,616 @@ +/* +--------------------------------------------------------------------------- +Open Asset Import Library (assimp) +--------------------------------------------------------------------------- + +Copyright (c) 2006-2019, assimp team + + + +All rights reserved. + +Redistribution and use of this software in source and binary forms, +with or without modification, are permitted provided that the following +conditions are met: + +* Redistributions of source code must retain the above + copyright notice, this list of conditions and the + following disclaimer. + +* Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the + following disclaimer in the documentation and/or other + materials provided with the distribution. + +* Neither the name of the assimp team, nor the names of its + contributors may be used to endorse or promote products + derived from this software without specific prior + written permission of the assimp team. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +--------------------------------------------------------------------------- +*/ + +/** @file BaseImporter.cpp + * @brief Implementation of BaseImporter + */ + +#include <assimp/BaseImporter.h> +#include <assimp/ParsingUtils.h> +#include "FileSystemFilter.h" +#include "Importer.h" +#include <assimp/ByteSwapper.h> +#include <assimp/scene.h> +#include <assimp/Importer.hpp> +#include <assimp/postprocess.h> +#include <assimp/importerdesc.h> + +#include <ios> +#include <list> +#include <memory> +#include <sstream> +#include <cctype> + +using namespace Assimp; + +// ------------------------------------------------------------------------------------------------ +// Constructor to be privately used by Importer +BaseImporter::BaseImporter() AI_NO_EXCEPT +: m_progress() { + // nothing to do here +} + +// ------------------------------------------------------------------------------------------------ +// Destructor, private as well +BaseImporter::~BaseImporter() { + // nothing to do here +} + +// ------------------------------------------------------------------------------------------------ +// Imports the given file and returns the imported data. +aiScene* BaseImporter::ReadFile(const Importer* pImp, const std::string& pFile, IOSystem* pIOHandler) { + m_progress = pImp->GetProgressHandler(); + if (nullptr == m_progress) { + return nullptr; + } + + ai_assert(m_progress); + + // Gather configuration properties for this run + SetupProperties( pImp ); + + // Construct a file system filter to improve our success ratio at reading external files + FileSystemFilter filter(pFile,pIOHandler); + + // create a scene object to hold the data + std::unique_ptr<aiScene> sc(new aiScene()); + + // dispatch importing + try + { + InternReadFile( pFile, sc.get(), &filter); + + } catch( const std::exception& err ) { + // extract error description + m_ErrorText = err.what(); + ASSIMP_LOG_ERROR(m_ErrorText); + return nullptr; + } + + // return what we gathered from the import. + return sc.release(); +} + +// ------------------------------------------------------------------------------------------------ +void BaseImporter::SetupProperties(const Importer* /*pImp*/) +{ + // the default implementation does nothing +} + +// ------------------------------------------------------------------------------------------------ +void BaseImporter::GetExtensionList(std::set<std::string>& extensions) { + const aiImporterDesc* desc = GetInfo(); + ai_assert(desc != nullptr); + + const char* ext = desc->mFileExtensions; + ai_assert(ext != nullptr ); + + const char* last = ext; + do { + if (!*ext || *ext == ' ') { + extensions.insert(std::string(last,ext-last)); + ai_assert(ext-last > 0); + last = ext; + while(*last == ' ') { + ++last; + } + } + } + while(*ext++); +} + +// ------------------------------------------------------------------------------------------------ +/*static*/ bool BaseImporter::SearchFileHeaderForToken( IOSystem* pIOHandler, + const std::string& pFile, + const char** tokens, + unsigned int numTokens, + unsigned int searchBytes /* = 200 */, + bool tokensSol /* false */, + bool noAlphaBeforeTokens /* false */) +{ + ai_assert( nullptr != tokens ); + ai_assert( 0 != numTokens ); + ai_assert( 0 != searchBytes); + + if ( nullptr == pIOHandler ) { + return false; + } + + std::unique_ptr<IOStream> pStream (pIOHandler->Open(pFile)); + if (pStream.get() ) { + // read 200 characters from the file + std::unique_ptr<char[]> _buffer (new char[searchBytes+1 /* for the '\0' */]); + char *buffer( _buffer.get() ); + const size_t read( pStream->Read(buffer,1,searchBytes) ); + if( 0 == read ) { + return false; + } + + for( size_t i = 0; i < read; ++i ) { + buffer[ i ] = static_cast<char>( ::tolower( buffer[ i ] ) ); + } + + // It is not a proper handling of unicode files here ... + // ehm ... but it works in most cases. + char* cur = buffer,*cur2 = buffer,*end = &buffer[read]; + while (cur != end) { + if( *cur ) { + *cur2++ = *cur; + } + ++cur; + } + *cur2 = '\0'; + + std::string token; + for (unsigned int i = 0; i < numTokens; ++i ) { + ai_assert( nullptr != tokens[i] ); + const size_t len( strlen( tokens[ i ] ) ); + token.clear(); + const char *ptr( tokens[ i ] ); + for ( size_t tokIdx = 0; tokIdx < len; ++tokIdx ) { + token.push_back( static_cast<char>( tolower( *ptr ) ) ); + ++ptr; + } + const char* r = strstr( buffer, token.c_str() ); + if( !r ) { + continue; + } + // We need to make sure that we didn't accidentially identify the end of another token as our token, + // e.g. in a previous version the "gltf " present in some gltf files was detected as "f " + if (noAlphaBeforeTokens && (r != buffer && isalpha(r[-1]))) { + continue; + } + // We got a match, either we don't care where it is, or it happens to + // be in the beginning of the file / line + if (!tokensSol || r == buffer || r[-1] == '\r' || r[-1] == '\n') { + ASSIMP_LOG_DEBUG_F( "Found positive match for header keyword: ", tokens[i] ); + return true; + } + } + } + + return false; +} + +// ------------------------------------------------------------------------------------------------ +// Simple check for file extension +/*static*/ bool BaseImporter::SimpleExtensionCheck (const std::string& pFile, + const char* ext0, + const char* ext1, + const char* ext2) +{ + std::string::size_type pos = pFile.find_last_of('.'); + + // no file extension - can't read + if( pos == std::string::npos) + return false; + + const char* ext_real = & pFile[ pos+1 ]; + if( !ASSIMP_stricmp(ext_real,ext0) ) + return true; + + // check for other, optional, file extensions + if (ext1 && !ASSIMP_stricmp(ext_real,ext1)) + return true; + + if (ext2 && !ASSIMP_stricmp(ext_real,ext2)) + return true; + + return false; +} + +// ------------------------------------------------------------------------------------------------ +// Get file extension from path +std::string BaseImporter::GetExtension( const std::string& file ) { + std::string::size_type pos = file.find_last_of('.'); + + // no file extension at all + if (pos == std::string::npos) { + return ""; + } + + + // thanks to Andy Maloney for the hint + std::string ret = file.substr( pos + 1 ); + std::transform( ret.begin(), ret.end(), ret.begin(), ToLower<char>); + + return ret; +} + +// ------------------------------------------------------------------------------------------------ +// Check for magic bytes at the beginning of the file. +/* static */ bool BaseImporter::CheckMagicToken(IOSystem* pIOHandler, const std::string& pFile, + const void* _magic, unsigned int num, unsigned int offset, unsigned int size) +{ + ai_assert( size <= 16 ); + ai_assert( _magic ); + + if (!pIOHandler) { + return false; + } + union { + const char* magic; + const uint16_t* magic_u16; + const uint32_t* magic_u32; + }; + magic = reinterpret_cast<const char*>(_magic); + std::unique_ptr<IOStream> pStream (pIOHandler->Open(pFile)); + if (pStream.get() ) { + + // skip to offset + pStream->Seek(offset,aiOrigin_SET); + + // read 'size' characters from the file + union { + char data[16]; + uint16_t data_u16[8]; + uint32_t data_u32[4]; + }; + if(size != pStream->Read(data,1,size)) { + return false; + } + + for (unsigned int i = 0; i < num; ++i) { + // also check against big endian versions of tokens with size 2,4 + // that's just for convenience, the chance that we cause conflicts + // is quite low and it can save some lines and prevent nasty bugs + if (2 == size) { + uint16_t rev = *magic_u16; + ByteSwap::Swap(&rev); + if (data_u16[0] == *magic_u16 || data_u16[0] == rev) { + return true; + } + } + else if (4 == size) { + uint32_t rev = *magic_u32; + ByteSwap::Swap(&rev); + if (data_u32[0] == *magic_u32 || data_u32[0] == rev) { + return true; + } + } + else { + // any length ... just compare + if(!memcmp(magic,data,size)) { + return true; + } + } + magic += size; + } + } + return false; +} + +#include "../contrib/utf8cpp/source/utf8.h" + +// ------------------------------------------------------------------------------------------------ +// Convert to UTF8 data +void BaseImporter::ConvertToUTF8(std::vector<char>& data) +{ + //ConversionResult result; + if(data.size() < 8) { + throw DeadlyImportError("File is too small"); + } + + // UTF 8 with BOM + if((uint8_t)data[0] == 0xEF && (uint8_t)data[1] == 0xBB && (uint8_t)data[2] == 0xBF) { + ASSIMP_LOG_DEBUG("Found UTF-8 BOM ..."); + + std::copy(data.begin()+3,data.end(),data.begin()); + data.resize(data.size()-3); + return; + } + + + // UTF 32 BE with BOM + if(*((uint32_t*)&data.front()) == 0xFFFE0000) { + + // swap the endianness .. + for(uint32_t* p = (uint32_t*)&data.front(), *end = (uint32_t*)&data.back(); p <= end; ++p) { + AI_SWAP4P(p); + } + } + + // UTF 32 LE with BOM + if(*((uint32_t*)&data.front()) == 0x0000FFFE) { + ASSIMP_LOG_DEBUG("Found UTF-32 BOM ..."); + + std::vector<char> output; + int *ptr = (int*)&data[ 0 ]; + int *end = ptr + ( data.size() / sizeof(int) ) +1; + utf8::utf32to8( ptr, end, back_inserter(output)); + return; + } + + // UTF 16 BE with BOM + if(*((uint16_t*)&data.front()) == 0xFFFE) { + + // swap the endianness .. + for(uint16_t* p = (uint16_t*)&data.front(), *end = (uint16_t*)&data.back(); p <= end; ++p) { + ByteSwap::Swap2(p); + } + } + + // UTF 16 LE with BOM + if(*((uint16_t*)&data.front()) == 0xFEFF) { + ASSIMP_LOG_DEBUG("Found UTF-16 BOM ..."); + + std::vector<unsigned char> output; + utf8::utf16to8(data.begin(), data.end(), back_inserter(output)); + return; + } +} + +// ------------------------------------------------------------------------------------------------ +// Convert to UTF8 data to ISO-8859-1 +void BaseImporter::ConvertUTF8toISO8859_1(std::string& data) +{ + size_t size = data.size(); + size_t i = 0, j = 0; + + while(i < size) { + if ((unsigned char) data[i] < (size_t) 0x80) { + data[j] = data[i]; + } else if(i < size - 1) { + if((unsigned char) data[i] == 0xC2) { + data[j] = data[++i]; + } else if((unsigned char) data[i] == 0xC3) { + data[j] = ((unsigned char) data[++i] + 0x40); + } else { + std::stringstream stream; + stream << "UTF8 code " << std::hex << data[i] << data[i + 1] << " can not be converted into ISA-8859-1."; + ASSIMP_LOG_ERROR( stream.str() ); + + data[j++] = data[i++]; + data[j] = data[i]; + } + } else { + ASSIMP_LOG_ERROR("UTF8 code but only one character remaining"); + + data[j] = data[i]; + } + + i++; j++; + } + + data.resize(j); +} + +// ------------------------------------------------------------------------------------------------ +void BaseImporter::TextFileToBuffer(IOStream* stream, + std::vector<char>& data, + TextFileMode mode) +{ + ai_assert(nullptr != stream); + + const size_t fileSize = stream->FileSize(); + if (mode == FORBID_EMPTY) { + if(!fileSize) { + throw DeadlyImportError("File is empty"); + } + } + + data.reserve(fileSize+1); + data.resize(fileSize); + if(fileSize > 0) { + if(fileSize != stream->Read( &data[0], 1, fileSize)) { + throw DeadlyImportError("File read error"); + } + + ConvertToUTF8(data); + } + + // append a binary zero to simplify string parsing + data.push_back(0); +} + +// ------------------------------------------------------------------------------------------------ +namespace Assimp { + // Represents an import request + struct LoadRequest { + LoadRequest(const std::string& _file, unsigned int _flags,const BatchLoader::PropertyMap* _map, unsigned int _id) + : file(_file) + , flags(_flags) + , refCnt(1) + , scene(NULL) + , loaded(false) + , id(_id) { + if ( _map ) { + map = *_map; + } + } + + bool operator== ( const std::string& f ) const { + return file == f; + } + + const std::string file; + unsigned int flags; + unsigned int refCnt; + aiScene *scene; + bool loaded; + BatchLoader::PropertyMap map; + unsigned int id; + }; +} + +// ------------------------------------------------------------------------------------------------ +// BatchLoader::pimpl data structure +struct Assimp::BatchData { + BatchData( IOSystem* pIO, bool validate ) + : pIOSystem( pIO ) + , pImporter( nullptr ) + , next_id(0xffff) + , validate( validate ) { + ai_assert( nullptr != pIO ); + + pImporter = new Importer(); + pImporter->SetIOHandler( pIO ); + } + + ~BatchData() { + pImporter->SetIOHandler( nullptr ); /* get pointer back into our possession */ + delete pImporter; + } + + // IO system to be used for all imports + IOSystem* pIOSystem; + + // Importer used to load all meshes + Importer* pImporter; + + // List of all imports + std::list<LoadRequest> requests; + + // Base path + std::string pathBase; + + // Id for next item + unsigned int next_id; + + // Validation enabled state + bool validate; +}; + +typedef std::list<LoadRequest>::iterator LoadReqIt; + +// ------------------------------------------------------------------------------------------------ +BatchLoader::BatchLoader(IOSystem* pIO, bool validate ) { + ai_assert(nullptr != pIO); + + m_data = new BatchData( pIO, validate ); +} + +// ------------------------------------------------------------------------------------------------ +BatchLoader::~BatchLoader() +{ + // delete all scenes what have not been polled by the user + for ( LoadReqIt it = m_data->requests.begin();it != m_data->requests.end(); ++it) { + delete (*it).scene; + } + delete m_data; +} + +// ------------------------------------------------------------------------------------------------ +void BatchLoader::setValidation( bool enabled ) { + m_data->validate = enabled; +} + +// ------------------------------------------------------------------------------------------------ +bool BatchLoader::getValidation() const { + return m_data->validate; +} + +// ------------------------------------------------------------------------------------------------ +unsigned int BatchLoader::AddLoadRequest(const std::string& file, + unsigned int steps /*= 0*/, const PropertyMap* map /*= NULL*/) +{ + ai_assert(!file.empty()); + + // check whether we have this loading request already + for ( LoadReqIt it = m_data->requests.begin();it != m_data->requests.end(); ++it) { + // Call IOSystem's path comparison function here + if ( m_data->pIOSystem->ComparePaths((*it).file,file)) { + if (map) { + if ( !( ( *it ).map == *map ) ) { + continue; + } + } + else if ( !( *it ).map.empty() ) { + continue; + } + + (*it).refCnt++; + return (*it).id; + } + } + + // no, we don't have it. So add it to the queue ... + m_data->requests.push_back(LoadRequest(file,steps,map, m_data->next_id)); + return m_data->next_id++; +} + +// ------------------------------------------------------------------------------------------------ +aiScene* BatchLoader::GetImport( unsigned int which ) +{ + for ( LoadReqIt it = m_data->requests.begin();it != m_data->requests.end(); ++it) { + if ((*it).id == which && (*it).loaded) { + aiScene* sc = (*it).scene; + if (!(--(*it).refCnt)) { + m_data->requests.erase(it); + } + return sc; + } + } + return nullptr; +} + +// ------------------------------------------------------------------------------------------------ +void BatchLoader::LoadAll() +{ + // no threaded implementation for the moment + for ( LoadReqIt it = m_data->requests.begin();it != m_data->requests.end(); ++it) { + // force validation in debug builds + unsigned int pp = (*it).flags; + if ( m_data->validate ) { + pp |= aiProcess_ValidateDataStructure; + } + + // setup config properties if necessary + ImporterPimpl* pimpl = m_data->pImporter->Pimpl(); + pimpl->mFloatProperties = (*it).map.floats; + pimpl->mIntProperties = (*it).map.ints; + pimpl->mStringProperties = (*it).map.strings; + pimpl->mMatrixProperties = (*it).map.matrices; + + if (!DefaultLogger::isNullLogger()) + { + ASSIMP_LOG_INFO("%%% BEGIN EXTERNAL FILE %%%"); + ASSIMP_LOG_INFO_F("File: ", (*it).file); + } + m_data->pImporter->ReadFile((*it).file,pp); + (*it).scene = m_data->pImporter->GetOrphanedScene(); + (*it).loaded = true; + + ASSIMP_LOG_INFO("%%% END EXTERNAL FILE %%%"); + } +} |