630 lines
20 KiB
C++
630 lines
20 KiB
C++
/*
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---------------------------------------------------------------------------
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Open Asset Import Library (assimp)
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---------------------------------------------------------------------------
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Copyright (c) 2006-2021, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------
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*/
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/** @file BaseImporter.cpp
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* @brief Implementation of BaseImporter
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*/
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#include "FileSystemFilter.h"
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#include "Importer.h"
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#include <assimp/BaseImporter.h>
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#include <assimp/ByteSwapper.h>
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#include <assimp/ParsingUtils.h>
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#include <assimp/importerdesc.h>
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#include <assimp/postprocess.h>
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#include <assimp/scene.h>
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#include <assimp/Importer.hpp>
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#include <cctype>
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#include <ios>
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#include <list>
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#include <memory>
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#include <sstream>
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using namespace Assimp;
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// ------------------------------------------------------------------------------------------------
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// Constructor to be privately used by Importer
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BaseImporter::BaseImporter() AI_NO_EXCEPT
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: m_progress() {
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/**
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* Assimp Importer
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* unit conversions available
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* if you need another measurment unit add it below.
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* it's currently defined in assimp that we prefer meters.
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*
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* NOTE: Initialised here rather than in the header file
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* to workaround a VS2013 bug with brace initialisers
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* */
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importerUnits[ImporterUnits::M] = 1.0;
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importerUnits[ImporterUnits::CM] = 0.01;
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importerUnits[ImporterUnits::MM] = 0.001;
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importerUnits[ImporterUnits::INCHES] = 0.0254;
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importerUnits[ImporterUnits::FEET] = 0.3048;
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}
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// ------------------------------------------------------------------------------------------------
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// Destructor, private as well
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BaseImporter::~BaseImporter() {
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// nothing to do here
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}
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void BaseImporter::UpdateImporterScale(Importer *pImp) {
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ai_assert(pImp != nullptr);
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ai_assert(importerScale != 0.0);
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ai_assert(fileScale != 0.0);
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double activeScale = importerScale * fileScale;
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// Set active scaling
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pImp->SetPropertyFloat(AI_CONFIG_APP_SCALE_KEY, static_cast<float>(activeScale));
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ASSIMP_LOG_DEBUG_F("UpdateImporterScale scale set: %f", activeScale);
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}
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// ------------------------------------------------------------------------------------------------
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// Imports the given file and returns the imported data.
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aiScene *BaseImporter::ReadFile(Importer *pImp, const std::string &pFile, IOSystem *pIOHandler) {
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m_progress = pImp->GetProgressHandler();
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if (nullptr == m_progress) {
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return nullptr;
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}
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ai_assert(m_progress);
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// Gather configuration properties for this run
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SetupProperties(pImp);
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// Construct a file system filter to improve our success ratio at reading external files
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FileSystemFilter filter(pFile, pIOHandler);
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// create a scene object to hold the data
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std::unique_ptr<aiScene> sc(new aiScene());
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// dispatch importing
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try {
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InternReadFile(pFile, sc.get(), &filter);
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// Calculate import scale hook - required because pImp not available anywhere else
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// passes scale into ScaleProcess
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UpdateImporterScale(pImp);
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} catch( const std::exception &err ) {
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// extract error description
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m_ErrorText = err.what();
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ASSIMP_LOG_ERROR(err.what());
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m_Exception = std::current_exception();
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return nullptr;
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}
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// return what we gathered from the import.
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return sc.release();
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}
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// ------------------------------------------------------------------------------------------------
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void BaseImporter::SetupProperties(const Importer *) {
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// the default implementation does nothing
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}
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// ------------------------------------------------------------------------------------------------
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void BaseImporter::GetExtensionList(std::set<std::string> &extensions) {
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const aiImporterDesc *desc = GetInfo();
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ai_assert(desc != nullptr);
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const char *ext = desc->mFileExtensions;
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ai_assert(ext != nullptr);
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const char *last = ext;
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do {
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if (!*ext || *ext == ' ') {
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extensions.insert(std::string(last, ext - last));
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ai_assert(ext - last > 0);
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last = ext;
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while (*last == ' ') {
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++last;
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}
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}
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} while (*ext++);
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}
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// ------------------------------------------------------------------------------------------------
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/*static*/ bool BaseImporter::SearchFileHeaderForToken(IOSystem *pIOHandler,
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const std::string &pFile,
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const char **tokens,
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unsigned int numTokens,
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unsigned int searchBytes /* = 200 */,
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bool tokensSol /* false */,
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bool noAlphaBeforeTokens /* false */) {
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ai_assert(nullptr != tokens);
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ai_assert(0 != numTokens);
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ai_assert(0 != searchBytes);
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if (nullptr == pIOHandler) {
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return false;
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}
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std::unique_ptr<IOStream> pStream(pIOHandler->Open(pFile));
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if (pStream) {
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// read 200 characters from the file
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std::unique_ptr<char[]> _buffer(new char[searchBytes + 1 /* for the '\0' */]);
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char *buffer(_buffer.get());
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const size_t read(pStream->Read(buffer, 1, searchBytes));
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if (0 == read) {
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return false;
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}
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for (size_t i = 0; i < read; ++i) {
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buffer[i] = static_cast<char>(::tolower(buffer[i]));
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}
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// It is not a proper handling of unicode files here ...
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// ehm ... but it works in most cases.
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char *cur = buffer, *cur2 = buffer, *end = &buffer[read];
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while (cur != end) {
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if (*cur) {
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*cur2++ = *cur;
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}
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++cur;
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}
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*cur2 = '\0';
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std::string token;
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for (unsigned int i = 0; i < numTokens; ++i) {
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ai_assert(nullptr != tokens[i]);
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const size_t len(strlen(tokens[i]));
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token.clear();
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const char *ptr(tokens[i]);
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for (size_t tokIdx = 0; tokIdx < len; ++tokIdx) {
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token.push_back(static_cast<char>(tolower(*ptr)));
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++ptr;
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}
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const char *r = strstr(buffer, token.c_str());
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if (!r) {
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continue;
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}
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// We need to make sure that we didn't accidentially identify the end of another token as our token,
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// e.g. in a previous version the "gltf " present in some gltf files was detected as "f "
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if (noAlphaBeforeTokens && (r != buffer && isalpha(r[-1]))) {
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continue;
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}
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// We got a match, either we don't care where it is, or it happens to
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// be in the beginning of the file / line
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if (!tokensSol || r == buffer || r[-1] == '\r' || r[-1] == '\n') {
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ASSIMP_LOG_DEBUG_F("Found positive match for header keyword: ", tokens[i]);
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return true;
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}
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}
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}
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return false;
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}
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// ------------------------------------------------------------------------------------------------
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// Simple check for file extension
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/*static*/ bool BaseImporter::SimpleExtensionCheck(const std::string &pFile,
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const char *ext0,
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const char *ext1,
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const char *ext2) {
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std::string::size_type pos = pFile.find_last_of('.');
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// no file extension - can't read
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if (pos == std::string::npos)
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return false;
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const char *ext_real = &pFile[pos + 1];
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if (!ASSIMP_stricmp(ext_real, ext0))
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return true;
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// check for other, optional, file extensions
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if (ext1 && !ASSIMP_stricmp(ext_real, ext1))
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return true;
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if (ext2 && !ASSIMP_stricmp(ext_real, ext2))
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return true;
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return false;
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}
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// ------------------------------------------------------------------------------------------------
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// Get file extension from path
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std::string BaseImporter::GetExtension(const std::string &file) {
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std::string::size_type pos = file.find_last_of('.');
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// no file extension at all
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if (pos == std::string::npos) {
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return "";
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}
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// thanks to Andy Maloney for the hint
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std::string ret = file.substr(pos + 1);
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std::transform(ret.begin(), ret.end(), ret.begin(), ToLower<char>);
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return ret;
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}
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// ------------------------------------------------------------------------------------------------
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// Check for magic bytes at the beginning of the file.
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/* static */ bool BaseImporter::CheckMagicToken(IOSystem *pIOHandler, const std::string &pFile,
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const void *_magic, unsigned int num, unsigned int offset, unsigned int size) {
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ai_assert(size <= 16);
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ai_assert(_magic);
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if (!pIOHandler) {
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return false;
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}
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union {
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const char *magic;
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const uint16_t *magic_u16;
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const uint32_t *magic_u32;
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};
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magic = reinterpret_cast<const char *>(_magic);
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std::unique_ptr<IOStream> pStream(pIOHandler->Open(pFile));
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if (pStream) {
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// skip to offset
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pStream->Seek(offset, aiOrigin_SET);
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// read 'size' characters from the file
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union {
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char data[16];
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uint16_t data_u16[8];
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uint32_t data_u32[4];
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};
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if (size != pStream->Read(data, 1, size)) {
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return false;
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}
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for (unsigned int i = 0; i < num; ++i) {
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// also check against big endian versions of tokens with size 2,4
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// that's just for convenience, the chance that we cause conflicts
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// is quite low and it can save some lines and prevent nasty bugs
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if (2 == size) {
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uint16_t rev = *magic_u16;
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ByteSwap::Swap(&rev);
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if (data_u16[0] == *magic_u16 || data_u16[0] == rev) {
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return true;
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}
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} else if (4 == size) {
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uint32_t rev = *magic_u32;
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ByteSwap::Swap(&rev);
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if (data_u32[0] == *magic_u32 || data_u32[0] == rev) {
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return true;
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}
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} else {
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// any length ... just compare
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if (!memcmp(magic, data, size)) {
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return true;
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}
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}
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magic += size;
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}
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}
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return false;
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}
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#ifdef ASSIMP_USE_HUNTER
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#include <utf8.h>
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#else
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#include "../contrib/utf8cpp/source/utf8.h"
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#endif
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// ------------------------------------------------------------------------------------------------
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// Convert to UTF8 data
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void BaseImporter::ConvertToUTF8(std::vector<char> &data) {
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//ConversionResult result;
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if (data.size() < 8) {
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throw DeadlyImportError("File is too small");
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}
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// UTF 8 with BOM
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if ((uint8_t)data[0] == 0xEF && (uint8_t)data[1] == 0xBB && (uint8_t)data[2] == 0xBF) {
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ASSIMP_LOG_DEBUG("Found UTF-8 BOM ...");
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std::copy(data.begin() + 3, data.end(), data.begin());
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data.resize(data.size() - 3);
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return;
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}
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// UTF 32 BE with BOM
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if (*((uint32_t *)&data.front()) == 0xFFFE0000) {
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// swap the endianness ..
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for (uint32_t *p = (uint32_t *)&data.front(), *end = (uint32_t *)&data.back(); p <= end; ++p) {
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AI_SWAP4P(p);
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}
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}
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// UTF 32 LE with BOM
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if (*((uint32_t *)&data.front()) == 0x0000FFFE) {
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ASSIMP_LOG_DEBUG("Found UTF-32 BOM ...");
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std::vector<char> output;
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int *ptr = (int *)&data[0];
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int *end = ptr + (data.size() / sizeof(int)) + 1;
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utf8::utf32to8(ptr, end, back_inserter(output));
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return;
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}
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// UTF 16 BE with BOM
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if (*((uint16_t *)&data.front()) == 0xFFFE) {
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// swap the endianness ..
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for (uint16_t *p = (uint16_t *)&data.front(), *end = (uint16_t *)&data.back(); p <= end; ++p) {
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ByteSwap::Swap2(p);
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}
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}
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// UTF 16 LE with BOM
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if (*((uint16_t *)&data.front()) == 0xFEFF) {
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ASSIMP_LOG_DEBUG("Found UTF-16 BOM ...");
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std::vector<unsigned char> output;
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utf8::utf16to8(data.begin(), data.end(), back_inserter(output));
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return;
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}
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}
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// ------------------------------------------------------------------------------------------------
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// Convert to UTF8 data to ISO-8859-1
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void BaseImporter::ConvertUTF8toISO8859_1(std::string &data) {
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size_t size = data.size();
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size_t i = 0, j = 0;
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while (i < size) {
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if ((unsigned char)data[i] < (size_t)0x80) {
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data[j] = data[i];
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} else if (i < size - 1) {
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if ((unsigned char)data[i] == 0xC2) {
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data[j] = data[++i];
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} else if ((unsigned char)data[i] == 0xC3) {
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data[j] = ((unsigned char)data[++i] + 0x40);
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} else {
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std::stringstream stream;
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stream << "UTF8 code " << std::hex << data[i] << data[i + 1] << " can not be converted into ISA-8859-1.";
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ASSIMP_LOG_ERROR(stream.str());
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data[j++] = data[i++];
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data[j] = data[i];
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}
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} else {
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ASSIMP_LOG_ERROR("UTF8 code but only one character remaining");
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data[j] = data[i];
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}
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i++;
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j++;
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}
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data.resize(j);
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}
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// ------------------------------------------------------------------------------------------------
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void BaseImporter::TextFileToBuffer(IOStream *stream,
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std::vector<char> &data,
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TextFileMode mode) {
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ai_assert(nullptr != stream);
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const size_t fileSize = stream->FileSize();
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if (mode == FORBID_EMPTY) {
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if (!fileSize) {
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throw DeadlyImportError("File is empty");
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}
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}
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data.reserve(fileSize + 1);
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data.resize(fileSize);
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if (fileSize > 0) {
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if (fileSize != stream->Read(&data[0], 1, fileSize)) {
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throw DeadlyImportError("File read error");
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}
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ConvertToUTF8(data);
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}
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// append a binary zero to simplify string parsing
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data.push_back(0);
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}
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// ------------------------------------------------------------------------------------------------
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namespace Assimp {
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// Represents an import request
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struct LoadRequest {
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LoadRequest(const std::string &_file, unsigned int _flags, const BatchLoader::PropertyMap *_map, unsigned int _id) :
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file(_file),
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flags(_flags),
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refCnt(1),
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scene(nullptr),
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loaded(false),
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id(_id) {
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if (_map) {
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map = *_map;
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}
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}
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bool operator==(const std::string &f) const {
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return file == f;
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}
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const std::string file;
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unsigned int flags;
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unsigned int refCnt;
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aiScene *scene;
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bool loaded;
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BatchLoader::PropertyMap map;
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unsigned int id;
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};
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} // namespace Assimp
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// ------------------------------------------------------------------------------------------------
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// BatchLoader::pimpl data structure
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struct Assimp::BatchData {
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BatchData(IOSystem *pIO, bool validate) :
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pIOSystem(pIO), pImporter(nullptr), next_id(0xffff), validate(validate) {
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ai_assert(nullptr != pIO);
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pImporter = new Importer();
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pImporter->SetIOHandler(pIO);
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}
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~BatchData() {
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pImporter->SetIOHandler(nullptr); /* get pointer back into our possession */
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delete pImporter;
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}
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// IO system to be used for all imports
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IOSystem *pIOSystem;
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// Importer used to load all meshes
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Importer *pImporter;
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// List of all imports
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std::list<LoadRequest> requests;
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// Base path
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std::string pathBase;
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// Id for next item
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unsigned int next_id;
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// Validation enabled state
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bool validate;
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};
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typedef std::list<LoadRequest>::iterator LoadReqIt;
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// ------------------------------------------------------------------------------------------------
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BatchLoader::BatchLoader(IOSystem *pIO, bool validate) {
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ai_assert(nullptr != pIO);
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m_data = new BatchData(pIO, validate);
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}
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// ------------------------------------------------------------------------------------------------
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BatchLoader::~BatchLoader() {
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// delete all scenes what have not been polled by the user
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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_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 %%%");
|
|
}
|
|
}
|