add assimp submodule

1 files changed, 620 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/Common/BaseImporter.cpp b/src/mesh/assimp-master/code/Common/BaseImporter.cpp
new file mode 100644
index 0000000..383300e
--- /dev/null
+++ b/src/mesh/assimp-master/code/Common/BaseImporter.cpp
@@ -0,0 +1,620 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, 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 "FileSystemFilter.h"
+#include "Importer.h"
+#include <assimp/BaseImporter.h>
+#include <assimp/ByteSwapper.h>
+#include <assimp/ParsingUtils.h>
+#include <assimp/importerdesc.h>
+#include <assimp/postprocess.h>
+#include <assimp/scene.h>
+#include <assimp/Importer.hpp>
+
+#include <cctype>
+#include <ios>
+#include <list>
+#include <memory>
+#include <sstream>
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+BaseImporter::BaseImporter() AI_NO_EXCEPT
+        : m_progress() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+BaseImporter::~BaseImporter() {
+    // nothing to do here
+}
+
+void BaseImporter::UpdateImporterScale(Importer *pImp) {
+    ai_assert(pImp != nullptr);
+    ai_assert(importerScale != 0.0);
+    ai_assert(fileScale != 0.0);
+
+    double activeScale = importerScale * fileScale;
+
+    // Set active scaling
+    pImp->SetPropertyFloat(AI_CONFIG_APP_SCALE_KEY, static_cast<float>(activeScale));
+
+    ASSIMP_LOG_DEBUG("UpdateImporterScale scale set: ", activeScale);
+}
+
+// ------------------------------------------------------------------------------------------------
+// Imports the given file and returns the imported data.
+aiScene *BaseImporter::ReadFile(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);
+
+        // Calculate import scale hook - required because pImp not available anywhere else
+        // passes scale into ScaleProcess
+        UpdateImporterScale(pImp);
+
+    } catch( const std::exception &err ) {
+        // extract error description
+        m_ErrorText = err.what();
+        ASSIMP_LOG_ERROR(err.what());
+        m_Exception = std::current_exception();
+        return nullptr;
+    }
+
+    // return what we gathered from the import.
+    return sc.release();
+}
+
+// ------------------------------------------------------------------------------------------------
+void BaseImporter::SetupProperties(const Importer *) {
+    // 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,
+        std::size_t 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) {
+        // 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((unsigned char)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(static_cast<unsigned char>(*ptr))));
+                ++ptr;
+            }
+            const char *r = strstr(buffer, token.c_str());
+            if (!r) {
+                continue;
+            }
+            // We need to make sure that we didn't accidentally 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(static_cast<unsigned char>(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("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 std::string();
+    }
+
+    // thanks to Andy Maloney for the hint
+    std::string ret = file.substr(pos + 1);
+    ret = ai_tolower(ret);
+
+    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, std::size_t 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) {
+
+        // 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;
+}
+
+#ifdef ASSIMP_USE_HUNTER
+#include <utf8.h>
+#else
+#include "../contrib/utf8cpp/source/utf8.h"
+#endif
+
+// ------------------------------------------------------------------------------------------------
+// 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) {
+        // Check to ensure no overflow can happen
+        if(data.size() % 2 != 0) {
+            return;
+        }
+        // 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(nullptr),
+            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;
+};
+} // namespace Assimp
+
+// ------------------------------------------------------------------------------------------------
+// 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 /*= nullptr*/) {
+    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.emplace_back(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("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 %%%");
+    }
+}