vrshoot: c179c72369be libs/assimp/Importer.cpp

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view libs/assimp/Importer.cpp @ 3:c179c72369be

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author	John Tsiombikas <nuclear@member.fsf.org>
date	Mon, 03 Feb 2014 08:52:13 +0200
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1 /*

2 ---------------------------------------------------------------------------

3 Open Asset Import Library (assimp)

4 ---------------------------------------------------------------------------

10 Redistribution and use of this software in source and binary forms,

11 with or without modification, are permitted provided that the following

12 conditions are met:

14 * Redistributions of source code must retain the above

15 copyright notice, this list of conditions and the

16 following disclaimer.

18 * Redistributions in binary form must reproduce the above

19 copyright notice, this list of conditions and the

20 following disclaimer in the documentation and/or other

21 materials provided with the distribution.

23 * Neither the name of the assimp team, nor the names of its

24 contributors may be used to endorse or promote products

25 derived from this software without specific prior

26 written permission of the assimp team.

28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

29 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

30 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

31 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

32 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

33 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

34 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

35 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

36 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

37 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

38 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

39 ---------------------------------------------------------------------------

40 */

42 /** @file Importer.cpp

43 * @brief Implementation of the CPP-API class #Importer

44 */

46 #include "AssimpPCH.h"

47 #include "assimp/version.h"

49 // ------------------------------------------------------------------------------------------------

50 /* Uncomment this line to prevent Assimp from catching unknown exceptions.

51 *

52 * Note that any Exception except DeadlyImportError may lead to

53 * undefined behaviour -> loaders could remain in an unusable state and

54 * further imports with the same Importer instance could fail/crash/burn ...

55 */

56 // ------------------------------------------------------------------------------------------------

57 #ifndef ASSIMP_BUILD_DEBUG

58 # define ASSIMP_CATCH_GLOBAL_EXCEPTIONS

59 #endif

61 // ------------------------------------------------------------------------------------------------

62 // Internal headers

63 // ------------------------------------------------------------------------------------------------

64 #include "Importer.h"

65 #include "BaseProcess.h"

67 #include "DefaultIOStream.h"

68 #include "DefaultIOSystem.h"

69 #include "DefaultProgressHandler.h"

70 #include "GenericProperty.h"

71 #include "ProcessHelper.h"

72 #include "ScenePreprocessor.h"

73 #include "MemoryIOWrapper.h"

74 #include "Profiler.h"

75 #include "TinyFormatter.h"

77 #ifndef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS

78 # include "ValidateDataStructure.h"

79 #endif

81 using namespace Assimp::Profiling;

82 using namespace Assimp::Formatter;

84 namespace Assimp {

85 // ImporterRegistry.cpp

86 void GetImporterInstanceList(std::vector< BaseImporter* >& out);

87 // PostStepRegistry.cpp

88 void GetPostProcessingStepInstanceList(std::vector< BaseProcess* >& out);

89 }

91 using namespace Assimp;

92 using namespace Assimp::Intern;

94 // ------------------------------------------------------------------------------------------------

95 // Intern::AllocateFromAssimpHeap serves as abstract base class. It overrides

96 // new and delete (and their array counterparts) of public API classes (e.g. Logger) to

97 // utilize our DLL heap.

98 // See http://www.gotw.ca/publications/mill15.htm

99 // ------------------------------------------------------------------------------------------------

100 void* AllocateFromAssimpHeap::operator new ( size_t num_bytes) {

101 return ::operator new(num_bytes);

102 }

103

104 void* AllocateFromAssimpHeap::operator new ( size_t num_bytes, const std::nothrow_t& ) throw() {

105 try {

106 return AllocateFromAssimpHeap::operator new( num_bytes );

107 }

108 catch( ... ) {

109 return NULL;

110 }

111 }

112

113 void AllocateFromAssimpHeap::operator delete ( void* data) {

114 return ::operator delete(data);

115 }

116

117 void* AllocateFromAssimpHeap::operator new[] ( size_t num_bytes) {

118 return ::operator new[](num_bytes);

119 }

120

121 void* AllocateFromAssimpHeap::operator new[] ( size_t num_bytes, const std::nothrow_t& ) throw() {

122 try {

123 return AllocateFromAssimpHeap::operator new[]( num_bytes );

124 }

125 catch( ... ) {

126 return NULL;

127 }

128 }

129

130 void AllocateFromAssimpHeap::operator delete[] ( void* data) {

131 return ::operator delete[](data);

132 }

133

134 // ------------------------------------------------------------------------------------------------

135 // Importer constructor.

136 Importer::Importer()

137 {

138 // allocate the pimpl first

139 pimpl = new ImporterPimpl();

140

141 pimpl->mScene = NULL;

142 pimpl->mErrorString = "";

143

144 // Allocate a default IO handler

145 pimpl->mIOHandler = new DefaultIOSystem;

146 pimpl->mIsDefaultHandler = true;

147 pimpl->bExtraVerbose = false; // disable extra verbose mode by default

148

149 pimpl->mProgressHandler = new DefaultProgressHandler();

150 pimpl->mIsDefaultProgressHandler = true;

151

152 GetImporterInstanceList(pimpl->mImporter);

153 GetPostProcessingStepInstanceList(pimpl->mPostProcessingSteps);

154

155 // Allocate a SharedPostProcessInfo object and store pointers to it in all post-process steps in the list.

156 pimpl->mPPShared = new SharedPostProcessInfo();

157 for (std::vector<BaseProcess*>::iterator it = pimpl->mPostProcessingSteps.begin();

158 it != pimpl->mPostProcessingSteps.end();

159 ++it) {

160

161 (*it)->SetSharedData(pimpl->mPPShared);

162 }

163 }

164

165 // ------------------------------------------------------------------------------------------------

166 // Destructor of Importer

167 Importer::~Importer()

168 {

169 // Delete all import plugins

170 for( unsigned int a = 0; a < pimpl->mImporter.size(); a++)

171 delete pimpl->mImporter[a];

172

173 // Delete all post-processing plug-ins

174 for( unsigned int a = 0; a < pimpl->mPostProcessingSteps.size(); a++)

175 delete pimpl->mPostProcessingSteps[a];

176

177 // Delete the assigned IO and progress handler

178 delete pimpl->mIOHandler;

179 delete pimpl->mProgressHandler;

180

181 // Kill imported scene. Destructors should do that recursivly

182 delete pimpl->mScene;

183

184 // Delete shared post-processing data

185 delete pimpl->mPPShared;

186

187 // and finally the pimpl itself

188 delete pimpl;

189 }

190

191 // ------------------------------------------------------------------------------------------------

192 // Copy constructor - copies the config of another Importer, not the scene

193 Importer::Importer(const Importer &other)

194 {

195 new(this) Importer();

196

197 pimpl->mIntProperties = other.pimpl->mIntProperties;

198 pimpl->mFloatProperties = other.pimpl->mFloatProperties;

199 pimpl->mStringProperties = other.pimpl->mStringProperties;

200 }

201

202 // ------------------------------------------------------------------------------------------------

203 // Register a custom post-processing step

204 aiReturn Importer::RegisterPPStep(BaseProcess* pImp)

205 {

206 ai_assert(NULL != pImp);

207 ASSIMP_BEGIN_EXCEPTION_REGION();

208

209 pimpl->mPostProcessingSteps.push_back(pImp);

210 DefaultLogger::get()->info("Registering custom post-processing step");

211

212 ASSIMP_END_EXCEPTION_REGION(aiReturn);

213 return AI_SUCCESS;

214 }

215

216 // ------------------------------------------------------------------------------------------------

217 // Register a custom loader plugin

218 aiReturn Importer::RegisterLoader(BaseImporter* pImp)

219 {

220 ai_assert(NULL != pImp);

221 ASSIMP_BEGIN_EXCEPTION_REGION();

222

223 // --------------------------------------------------------------------

224 // Check whether we would have two loaders for the same file extension

225 // This is absolutely OK, but we should warn the developer of the new

226 // loader that his code will probably never be called if the first

227 // loader is a bit too lazy in his file checking.

228 // --------------------------------------------------------------------

229 std::set<std::string> st;

230 std::string baked;

231 pImp->GetExtensionList(st);

232

233 for(std::set<std::string>::const_iterator it = st.begin(); it != st.end(); ++it) {

234

235 #ifdef _DEBUG

236 if (IsExtensionSupported(*it)) {

237 DefaultLogger::get()->warn("The file extension " + *it + " is already in use");

238 }

239 #endif

240 baked += *it;

241 }

242

243 // add the loader

244 pimpl->mImporter.push_back(pImp);

245 DefaultLogger::get()->info("Registering custom importer for these file extensions: " + baked);

246 ASSIMP_END_EXCEPTION_REGION(aiReturn);

247 return AI_SUCCESS;

248 }

249

250 // ------------------------------------------------------------------------------------------------

251 // Unregister a custom loader plugin

252 aiReturn Importer::UnregisterLoader(BaseImporter* pImp)

253 {

254 if(!pImp) {

255 // unregistering a NULL importer is no problem for us ... really!

256 return AI_SUCCESS;

257 }

258

259 ASSIMP_BEGIN_EXCEPTION_REGION();

260 std::vector<BaseImporter*>::iterator it = std::find(pimpl->mImporter.begin(),

261 pimpl->mImporter.end(),pImp);

262

263 if (it != pimpl->mImporter.end()) {

264 pimpl->mImporter.erase(it);

265

266 std::set<std::string> st;

267 pImp->GetExtensionList(st);

268

269 DefaultLogger::get()->info("Unregistering custom importer: ");

270 return AI_SUCCESS;

271 }

272 DefaultLogger::get()->warn("Unable to remove custom importer: I can't find you ...");

273 ASSIMP_END_EXCEPTION_REGION(aiReturn);

274 return AI_FAILURE;

275 }

276

277 // ------------------------------------------------------------------------------------------------

278 // Unregister a custom loader plugin

279 aiReturn Importer::UnregisterPPStep(BaseProcess* pImp)

280 {

281 if(!pImp) {

282 // unregistering a NULL ppstep is no problem for us ... really!

283 return AI_SUCCESS;

284 }

285

286 ASSIMP_BEGIN_EXCEPTION_REGION();

287 std::vector<BaseProcess*>::iterator it = std::find(pimpl->mPostProcessingSteps.begin(),

288 pimpl->mPostProcessingSteps.end(),pImp);

289

290 if (it != pimpl->mPostProcessingSteps.end()) {

291 pimpl->mPostProcessingSteps.erase(it);

292 DefaultLogger::get()->info("Unregistering custom post-processing step");

293 return AI_SUCCESS;

294 }

295 DefaultLogger::get()->warn("Unable to remove custom post-processing step: I can't find you ..");

296 ASSIMP_END_EXCEPTION_REGION(aiReturn);

297 return AI_FAILURE;

298 }

299

300 // ------------------------------------------------------------------------------------------------

301 // Supplies a custom IO handler to the importer to open and access files.

302 void Importer::SetIOHandler( IOSystem* pIOHandler)

303 {

304 ASSIMP_BEGIN_EXCEPTION_REGION();

305 // If the new handler is zero, allocate a default IO implementation.

306 if (!pIOHandler)

307 {

308 // Release pointer in the possession of the caller

309 pimpl->mIOHandler = new DefaultIOSystem();

310 pimpl->mIsDefaultHandler = true;

311 }

312 // Otherwise register the custom handler

313 else if (pimpl->mIOHandler != pIOHandler)

314 {

315 delete pimpl->mIOHandler;

316 pimpl->mIOHandler = pIOHandler;

317 pimpl->mIsDefaultHandler = false;

318 }

319 ASSIMP_END_EXCEPTION_REGION(void);

320 }

321

322 // ------------------------------------------------------------------------------------------------

323 // Get the currently set IO handler

324 IOSystem* Importer::GetIOHandler() const

325 {

326 return pimpl->mIOHandler;

327 }

328

329 // ------------------------------------------------------------------------------------------------

330 // Check whether a custom IO handler is currently set

331 bool Importer::IsDefaultIOHandler() const

332 {

333 return pimpl->mIsDefaultHandler;

334 }

335

336 // ------------------------------------------------------------------------------------------------

337 // Supplies a custom progress handler to get regular callbacks during importing

338 void Importer::SetProgressHandler ( ProgressHandler* pHandler )

339 {

340 ASSIMP_BEGIN_EXCEPTION_REGION();

341 // If the new handler is zero, allocate a default implementation.

342 if (!pHandler)

343 {

344 // Release pointer in the possession of the caller

345 pimpl->mProgressHandler = new DefaultProgressHandler();

346 pimpl->mIsDefaultProgressHandler = true;

347 }

348 // Otherwise register the custom handler

349 else if (pimpl->mProgressHandler != pHandler)

350 {

351 delete pimpl->mProgressHandler;

352 pimpl->mProgressHandler = pHandler;

353 pimpl->mIsDefaultProgressHandler = false;

354 }

355 ASSIMP_END_EXCEPTION_REGION(void);

356 }

357

358 // ------------------------------------------------------------------------------------------------

359 // Get the currently set progress handler

360 ProgressHandler* Importer::GetProgressHandler() const

361 {

362 return pimpl->mProgressHandler;

363 }

364

365 // ------------------------------------------------------------------------------------------------

366 // Check whether a custom progress handler is currently set

367 bool Importer::IsDefaultProgressHandler() const

368 {

369 return pimpl->mIsDefaultProgressHandler;

370 }

371

372 // ------------------------------------------------------------------------------------------------

373 // Validate post process step flags

374 bool _ValidateFlags(unsigned int pFlags)

375 {

376 if (pFlags & aiProcess_GenSmoothNormals && pFlags & aiProcess_GenNormals) {

377 DefaultLogger::get()->error("#aiProcess_GenSmoothNormals and #aiProcess_GenNormals are incompatible");

378 return false;

379 }

380 if (pFlags & aiProcess_OptimizeGraph && pFlags & aiProcess_PreTransformVertices) {

381 DefaultLogger::get()->error("#aiProcess_OptimizeGraph and #aiProcess_PreTransformVertices are incompatible");

382 return false;

383 }

384 return true;

385 }

386

387 // ------------------------------------------------------------------------------------------------

388 // Free the current scene

389 void Importer::FreeScene( )

390 {

391 ASSIMP_BEGIN_EXCEPTION_REGION();

392 delete pimpl->mScene;

393 pimpl->mScene = NULL;

394

395 pimpl->mErrorString = "";

396 ASSIMP_END_EXCEPTION_REGION(void);

397 }

398

399 // ------------------------------------------------------------------------------------------------

400 // Get the current error string, if any

401 const char* Importer::GetErrorString() const

402 {

403 /* Must remain valid as long as ReadFile() or FreeFile() are not called */

404 return pimpl->mErrorString.c_str();

405 }

406

407 // ------------------------------------------------------------------------------------------------

408 // Enable extra-verbose mode

409 void Importer::SetExtraVerbose(bool bDo)

410 {

411 pimpl->bExtraVerbose = bDo;

412 }

413

414 // ------------------------------------------------------------------------------------------------

415 // Get the current scene

416 const aiScene* Importer::GetScene() const

417 {

418 return pimpl->mScene;

419 }

420

421 // ------------------------------------------------------------------------------------------------

422 // Orphan the current scene and return it.

423 aiScene* Importer::GetOrphanedScene()

424 {

425 aiScene* s = pimpl->mScene;

426

427 ASSIMP_BEGIN_EXCEPTION_REGION();

428 pimpl->mScene = NULL;

429

430 pimpl->mErrorString = ""; /* reset error string */

431 ASSIMP_END_EXCEPTION_REGION(aiScene*);

432 return s;

433 }

434

435 // ------------------------------------------------------------------------------------------------

436 // Validate post-processing flags

437 bool Importer::ValidateFlags(unsigned int pFlags) const

438 {

439 ASSIMP_BEGIN_EXCEPTION_REGION();

440 // run basic checks for mutually exclusive flags

441 if(!_ValidateFlags(pFlags)) {

442 return false;

443 }

444

445 // ValidateDS does not anymore occur in the pp list, it plays an awesome extra role ...

446 #ifdef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS

447 if (pFlags & aiProcess_ValidateDataStructure) {

448 return false;

449 }

450 #endif

451 pFlags &= ~aiProcess_ValidateDataStructure;

452

453 // Now iterate through all bits which are set in the flags and check whether we find at least

454 // one pp plugin which handles it.

455 for (unsigned int mask = 1; mask < (1u << (sizeof(unsigned int)*8-1));mask <<= 1) {

456

457 if (pFlags & mask) {

458

459 bool have = false;

460 for( unsigned int a = 0; a < pimpl->mPostProcessingSteps.size(); a++) {

461 if (pimpl->mPostProcessingSteps[a]-> IsActive(mask) ) {

462

463 have = true;

464 break;

465 }

466 }

467 if (!have) {

468 return false;

469 }

470 }

471 }

472 ASSIMP_END_EXCEPTION_REGION(bool);

473 return true;

474 }

475

476 // ------------------------------------------------------------------------------------------------

477 const aiScene* Importer::ReadFileFromMemory( const void* pBuffer,

478 size_t pLength,

479 unsigned int pFlags,

480 const char* pHint /*= ""*/)

481 {

482 ASSIMP_BEGIN_EXCEPTION_REGION();

483 if (!pHint) {

484 pHint = "";

485 }

486

487 if (!pBuffer || !pLength || strlen(pHint) > 100) {

488 pimpl->mErrorString = "Invalid parameters passed to ReadFileFromMemory()";

489 return NULL;

490 }

491

492 // prevent deletion of the previous IOHandler

493 IOSystem* io = pimpl->mIOHandler;

494 pimpl->mIOHandler = NULL;

495

496 SetIOHandler(new MemoryIOSystem((const uint8_t*)pBuffer,pLength));

497

498 // read the file and recover the previous IOSystem

499 char fbuff[128];

500 sprintf(fbuff,"%s.%s",AI_MEMORYIO_MAGIC_FILENAME,pHint);

501

502 ReadFile(fbuff,pFlags);

503 SetIOHandler(io);

504

505 ASSIMP_END_EXCEPTION_REGION(const aiScene*);

506 return pimpl->mScene;

507 }

508

509 // ------------------------------------------------------------------------------------------------

510 void WriteLogOpening(const std::string& file)

511 {

512 Logger* l = DefaultLogger::get();

513 if (!l) {

514 return;

515 }

516 l->info("Load " + file);

517

518 // print a full version dump. This is nice because we don't

519 // need to ask the authors of incoming bug reports for

520 // the library version they're using - a log dump is

521 // sufficient.

522 const unsigned int flags = aiGetCompileFlags();

523 l->debug(format()

524 << "Assimp "

525 << aiGetVersionMajor()

526 << "."

527 << aiGetVersionMinor()

528 << "."

529 << aiGetVersionRevision()

530

531 << " "

532 #if defined(ASSIMP_BUILD_ARCHITECTURE)

533 << ASSIMP_BUILD_ARCHITECTURE

534 #elif defined(_M_IX86) || defined(__x86_32__) || defined(__i386__)

535 << "x86"

536 #elif defined(_M_X64) || defined(__x86_64__)

537 << "amd64"

538 #elif defined(_M_IA64) || defined(__ia64__)

539 << "itanium"

540 #elif defined(__ppc__) || defined(__powerpc__)

541 << "ppc32"

542 #elif defined(__powerpc64__)

543 << "ppc64"

544 #elif defined(__arm__)

545 << "arm"

546 #else

547 << "<unknown architecture>"

548 #endif

549

550 << " "

551 #if defined(ASSIMP_BUILD_COMPILER)

552 << ASSIMP_BUILD_COMPILER

553 #elif defined(_MSC_VER)

554 << "msvc"

555 #elif defined(__GNUC__)

556 << "gcc"

557 #else

558 << "<unknown compiler>"

559 #endif

560

561 #ifndef NDEBUG

562 << " debug"

563 #endif

564

565 << (flags & ASSIMP_CFLAGS_NOBOOST ? " noboost" : "")

566 << (flags & ASSIMP_CFLAGS_SHARED ? " shared" : "")

567 << (flags & ASSIMP_CFLAGS_SINGLETHREADED ? " singlethreaded" : "")

568 );

569 }

570

571 // ------------------------------------------------------------------------------------------------

572 // Reads the given file and returns its contents if successful.

573 const aiScene* Importer::ReadFile( const char* _pFile, unsigned int pFlags)

574 {

575 ASSIMP_BEGIN_EXCEPTION_REGION();

576 const std::string pFile(_pFile);

577

578 // ----------------------------------------------------------------------

579 // Put a large try block around everything to catch all std::exception's

580 // that might be thrown by STL containers or by new().

581 // ImportErrorException's are throw by ourselves and caught elsewhere.

582 //-----------------------------------------------------------------------

583

584 WriteLogOpening(pFile);

585

586 #ifdef ASSIMP_CATCH_GLOBAL_EXCEPTIONS

587 try

588 #endif // ! ASSIMP_CATCH_GLOBAL_EXCEPTIONS

589 {

590 // Check whether this Importer instance has already loaded

591 // a scene. In this case we need to delete the old one

592 if (pimpl->mScene) {

593

594 DefaultLogger::get()->debug("(Deleting previous scene)");

595 FreeScene();

596 }

597

598 // First check if the file is accessable at all

599 if( !pimpl->mIOHandler->Exists( pFile)) {

600

601 pimpl->mErrorString = "Unable to open file \"" + pFile + "\".";

602 DefaultLogger::get()->error(pimpl->mErrorString);

603 return NULL;

604 }

605

606 boost::scoped_ptr<Profiler> profiler(GetPropertyInteger(AI_CONFIG_GLOB_MEASURE_TIME,0)?new Profiler():NULL);

607 if (profiler) {

608 profiler->BeginRegion("total");

609 }

610

611 // Find an worker class which can handle the file

612 BaseImporter* imp = NULL;

613 for( unsigned int a = 0; a < pimpl->mImporter.size(); a++) {

614

615 if( pimpl->mImporter[a]->CanRead( pFile, pimpl->mIOHandler, false)) {

616 imp = pimpl->mImporter[a];

617 break;

618 }

619 }

620

621 if (!imp) {

622 // not so bad yet ... try format auto detection.

623 const std::string::size_type s = pFile.find_last_of('.');

624 if (s != std::string::npos) {

625 DefaultLogger::get()->info("File extension not known, trying signature-based detection");

626 for( unsigned int a = 0; a < pimpl->mImporter.size(); a++) {

627

628 if( pimpl->mImporter[a]->CanRead( pFile, pimpl->mIOHandler, true)) {

629 imp = pimpl->mImporter[a];

630 break;

631 }

632 }

633 }

634 // Put a proper error message if no suitable importer was found

635 if( !imp) {

636 pimpl->mErrorString = "No suitable reader found for the file format of file \"" + pFile + "\".";

637 DefaultLogger::get()->error(pimpl->mErrorString);

638 return NULL;

639 }

640 }

641

642 // Dispatch the reading to the worker class for this format

643 DefaultLogger::get()->info("Found a matching importer for this file format");

644 pimpl->mProgressHandler->Update();

645

646 if (profiler) {

647 profiler->BeginRegion("import");

648 }

649

650 pimpl->mScene = imp->ReadFile( this, pFile, pimpl->mIOHandler);

651 pimpl->mProgressHandler->Update();

652

653 if (profiler) {

654 profiler->EndRegion("import");

655 }

656

657 // If successful, apply all active post processing steps to the imported data

658 if( pimpl->mScene) {

659

660 #ifndef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS

661 // The ValidateDS process is an exception. It is executed first, even before ScenePreprocessor is called.

662 if (pFlags & aiProcess_ValidateDataStructure)

663 {

664 ValidateDSProcess ds;

665 ds.ExecuteOnScene (this);

666 if (!pimpl->mScene) {

667 return NULL;

668 }

669 }

670 #endif // no validation

671

672 // Preprocess the scene and prepare it for post-processing

673 if (profiler) {

674 profiler->BeginRegion("preprocess");

675 }

676

677 ScenePreprocessor pre(pimpl->mScene);

678 pre.ProcessScene();

679

680 pimpl->mProgressHandler->Update();

681 if (profiler) {

682 profiler->EndRegion("preprocess");

683 }

684

685 // Ensure that the validation process won't be called twice

686 ApplyPostProcessing(pFlags & (~aiProcess_ValidateDataStructure));

687 }

688 // if failed, extract the error string

689 else if( !pimpl->mScene) {

690 pimpl->mErrorString = imp->GetErrorText();

691 }

692

693 // clear any data allocated by post-process steps

694 pimpl->mPPShared->Clean();

695

696 if (profiler) {

697 profiler->EndRegion("total");

698 }

699 }

700 #ifdef ASSIMP_CATCH_GLOBAL_EXCEPTIONS

701 catch (std::exception &e)

702 {

703 #if (defined _MSC_VER) && (defined _CPPRTTI)

704 // if we have RTTI get the full name of the exception that occured

705 pimpl->mErrorString = std::string(typeid( e ).name()) + ": " + e.what();

706 #else

707 pimpl->mErrorString = std::string("std::exception: ") + e.what();

708 #endif

709

710 DefaultLogger::get()->error(pimpl->mErrorString);

711 delete pimpl->mScene; pimpl->mScene = NULL;

712 }

713 #endif // ! ASSIMP_CATCH_GLOBAL_EXCEPTIONS

714

715 // either successful or failure - the pointer expresses it anyways

716 ASSIMP_END_EXCEPTION_REGION(const aiScene*);

717 return pimpl->mScene;

718 }

719

720

721 // ------------------------------------------------------------------------------------------------

722 // Apply post-processing to the currently bound scene

723 const aiScene* Importer::ApplyPostProcessing(unsigned int pFlags)

724 {

725 ASSIMP_BEGIN_EXCEPTION_REGION();

726 // Return immediately if no scene is active

727 if (!pimpl->mScene) {

728 return NULL;

729 }

730

731 // If no flags are given, return the current scene with no further action

732 if (!pFlags) {

733 return pimpl->mScene;

734 }

735

736 // In debug builds: run basic flag validation

737 ai_assert(_ValidateFlags(pFlags));

738 DefaultLogger::get()->info("Entering post processing pipeline");

739

740 #ifndef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS

741 // The ValidateDS process plays an exceptional role. It isn't contained in the global

742 // list of post-processing steps, so we need to call it manually.

743 if (pFlags & aiProcess_ValidateDataStructure)

744 {

745 ValidateDSProcess ds;

746 ds.ExecuteOnScene (this);

747 if (!pimpl->mScene) {

748 return NULL;

749 }

750 }

751 #endif // no validation

752 #ifdef _DEBUG

753 if (pimpl->bExtraVerbose)

754 {

755 #ifndef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS

756 DefaultLogger::get()->error("Verbose Import is not available due to build settings");

757 #endif // no validation

758 pFlags |= aiProcess_ValidateDataStructure;

759 }

760 #else

761 if (pimpl->bExtraVerbose) {

762 DefaultLogger::get()->warn("Not a debug build, ignoring extra verbose setting");

763 }

764 #endif // ! DEBUG

765

766 boost::scoped_ptr<Profiler> profiler(GetPropertyInteger(AI_CONFIG_GLOB_MEASURE_TIME,0)?new Profiler():NULL);

767 for( unsigned int a = 0; a < pimpl->mPostProcessingSteps.size(); a++) {

768

769 BaseProcess* process = pimpl->mPostProcessingSteps[a];

770 if( process->IsActive( pFlags)) {

771

772 if (profiler) {

773 profiler->BeginRegion("postprocess");

774 }

775

776 process->ExecuteOnScene ( this );

777 pimpl->mProgressHandler->Update();

778

779 if (profiler) {

780 profiler->EndRegion("postprocess");

781 }

782 }

783 if( !pimpl->mScene) {

784 break;

785 }

786 #ifdef _DEBUG

787

788 #ifndef ASSIMP_BUILD_NO_VALIDATEDS_PROCESS

789 continue;

790 #endif // no validation

791

792 // If the extra verbose mode is active, execute the ValidateDataStructureStep again - after each step

793 if (pimpl->bExtraVerbose) {

794 DefaultLogger::get()->debug("Verbose Import: revalidating data structures");

795

796 ValidateDSProcess ds;

797 ds.ExecuteOnScene (this);

798 if( !pimpl->mScene) {

799 DefaultLogger::get()->error("Verbose Import: failed to revalidate data structures");

800 break;

801 }

802 }

803 #endif // ! DEBUG

804 }

805

806 // update private scene flags

807 if( pimpl->mScene )

808 ScenePriv(pimpl->mScene)->mPPStepsApplied |= pFlags;

809

810 // clear any data allocated by post-process steps

811 pimpl->mPPShared->Clean();

812 DefaultLogger::get()->info("Leaving post processing pipeline");

813

814 ASSIMP_END_EXCEPTION_REGION(const aiScene*);

815 return pimpl->mScene;

816 }

817

818 // ------------------------------------------------------------------------------------------------

819 // Helper function to check whether an extension is supported by ASSIMP

820 bool Importer::IsExtensionSupported(const char* szExtension) const

821 {

822 return NULL != GetImporter(szExtension);

823 }

824

825 // ------------------------------------------------------------------------------------------------

826 size_t Importer::GetImporterCount() const

827 {

828 return pimpl->mImporter.size();

829 }

830

831 // ------------------------------------------------------------------------------------------------

832 const aiImporterDesc* Importer::GetImporterInfo(size_t index) const

833 {

834 if (index >= pimpl->mImporter.size()) {

835 return NULL;

836 }

837 return pimpl->mImporter[index]->GetInfo();

838 }

839

840

841 // ------------------------------------------------------------------------------------------------

842 BaseImporter* Importer::GetImporter (size_t index) const

843 {

844 if (index >= pimpl->mImporter.size()) {

845 return NULL;

846 }

847 return pimpl->mImporter[index];

848 }

849

850 // ------------------------------------------------------------------------------------------------

851 // Find a loader plugin for a given file extension

852 BaseImporter* Importer::GetImporter (const char* szExtension) const

853 {

854 return GetImporter(GetImporterIndex(szExtension));

855 }

856

857 // ------------------------------------------------------------------------------------------------

858 // Find a loader plugin for a given file extension

859 size_t Importer::GetImporterIndex (const char* szExtension) const

860 {

861 ai_assert(szExtension);

862 ASSIMP_BEGIN_EXCEPTION_REGION();

863

864 // skip over wildcard and dot characters at string head --

865 for(;*szExtension == '*' || *szExtension == '.'; ++szExtension);

866

867 std::string ext(szExtension);

868 if (ext.empty()) {

869 return static_cast<size_t>(-1);

870 }

871 std::transform(ext.begin(),ext.end(), ext.begin(), tolower);

872

873 std::set<std::string> str;

874 for (std::vector<BaseImporter*>::const_iterator i = pimpl->mImporter.begin();i != pimpl->mImporter.end();++i) {

875 str.clear();

876

877 (*i)->GetExtensionList(str);

878 for (std::set<std::string>::const_iterator it = str.begin(); it != str.end(); ++it) {

879 if (ext == *it) {

880 return std::distance(static_cast< std::vector<BaseImporter*>::const_iterator >(pimpl->mImporter.begin()), i);

881 }

882 }

883 }

884 ASSIMP_END_EXCEPTION_REGION(size_t);

885 return static_cast<size_t>(-1);

886 }

887

888 // ------------------------------------------------------------------------------------------------

889 // Helper function to build a list of all file extensions supported by ASSIMP

890 void Importer::GetExtensionList(aiString& szOut) const

891 {

892 ASSIMP_BEGIN_EXCEPTION_REGION();

893 std::set<std::string> str;

894 for (std::vector<BaseImporter*>::const_iterator i = pimpl->mImporter.begin();i != pimpl->mImporter.end();++i) {

895 (*i)->GetExtensionList(str);

896 }

897

898 for (std::set<std::string>::const_iterator it = str.begin();; ) {

899 szOut.Append("*.");

900 szOut.Append((*it).c_str());

901

902 if (++it == str.end()) {

903 break;

904 }

905 szOut.Append(";");

906 }

907 ASSIMP_END_EXCEPTION_REGION(void);

908 }

909

910 // ------------------------------------------------------------------------------------------------

911 // Set a configuration property

912 void Importer::SetPropertyInteger(const char* szName, int iValue,

913 bool* bWasExisting /*= NULL*/)

914 {

915 ASSIMP_BEGIN_EXCEPTION_REGION();

916 SetGenericProperty<int>(pimpl->mIntProperties, szName,iValue,bWasExisting);

917 ASSIMP_END_EXCEPTION_REGION(void);

918 }

919

920 // ------------------------------------------------------------------------------------------------

921 // Set a configuration property

922 void Importer::SetPropertyFloat(const char* szName, float iValue,

923 bool* bWasExisting /*= NULL*/)

924 {

925 ASSIMP_BEGIN_EXCEPTION_REGION();

926 SetGenericProperty<float>(pimpl->mFloatProperties, szName,iValue,bWasExisting);

927 ASSIMP_END_EXCEPTION_REGION(void);

928 }

929

930 // ------------------------------------------------------------------------------------------------

931 // Set a configuration property

932 void Importer::SetPropertyString(const char* szName, const std::string& value,

933 bool* bWasExisting /*= NULL*/)

934 {

935 ASSIMP_BEGIN_EXCEPTION_REGION();

936 SetGenericProperty<std::string>(pimpl->mStringProperties, szName,value,bWasExisting);

937 ASSIMP_END_EXCEPTION_REGION(void);

938 }

939

940 // ------------------------------------------------------------------------------------------------

941 // Get a configuration property

942 int Importer::GetPropertyInteger(const char* szName,

943 int iErrorReturn /*= 0xffffffff*/) const

944 {

945 return GetGenericProperty<int>(pimpl->mIntProperties,szName,iErrorReturn);

946 }

947

948 // ------------------------------------------------------------------------------------------------

949 // Get a configuration property

950 float Importer::GetPropertyFloat(const char* szName,

951 float iErrorReturn /*= 10e10*/) const

952 {

953 return GetGenericProperty<float>(pimpl->mFloatProperties,szName,iErrorReturn);

954 }

955

956 // ------------------------------------------------------------------------------------------------

957 // Get a configuration property

958 const std::string& Importer::GetPropertyString(const char* szName,

959 const std::string& iErrorReturn /*= ""*/) const

960 {

961 return GetGenericProperty<std::string>(pimpl->mStringProperties,szName,iErrorReturn);

962 }

963

964 // ------------------------------------------------------------------------------------------------

965 // Get the memory requirements of a single node

966 inline void AddNodeWeight(unsigned int& iScene,const aiNode* pcNode)

967 {

968 iScene += sizeof(aiNode);

969 iScene += sizeof(unsigned int) * pcNode->mNumMeshes;

970 iScene += sizeof(void*) * pcNode->mNumChildren;

971

972 for (unsigned int i = 0; i < pcNode->mNumChildren;++i) {

973 AddNodeWeight(iScene,pcNode->mChildren[i]);

974 }

975 }

976

977 // ------------------------------------------------------------------------------------------------

978 // Get the memory requirements of the scene

979 void Importer::GetMemoryRequirements(aiMemoryInfo& in) const

980 {

981 in = aiMemoryInfo();

982 aiScene* mScene = pimpl->mScene;

983

984 // return if we have no scene loaded

985 if (!pimpl->mScene)

986 return;

987

988

989 in.total = sizeof(aiScene);

990

991 // add all meshes

992 for (unsigned int i = 0; i < mScene->mNumMeshes;++i)

993 {

994 in.meshes += sizeof(aiMesh);

995 if (mScene->mMeshes[i]->HasPositions()) {

996 in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices;

997 }

998

999 if (mScene->mMeshes[i]->HasNormals()) {

1000 in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices;

1001 }

1002

1003 if (mScene->mMeshes[i]->HasTangentsAndBitangents()) {

1004 in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices * 2;

1005 }

1006

1007 for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS;++a) {

1008 if (mScene->mMeshes[i]->HasVertexColors(a)) {

1009 in.meshes += sizeof(aiColor4D) * mScene->mMeshes[i]->mNumVertices;

1010 }

1011 else break;

1012 }

1013 for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS;++a) {

1014 if (mScene->mMeshes[i]->HasTextureCoords(a)) {

1015 in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices;

1016 }

1017 else break;

1018 }

1019 if (mScene->mMeshes[i]->HasBones()) {

1020 in.meshes += sizeof(void*) * mScene->mMeshes[i]->mNumBones;

1021 for (unsigned int p = 0; p < mScene->mMeshes[i]->mNumBones;++p) {

1022 in.meshes += sizeof(aiBone);

1023 in.meshes += mScene->mMeshes[i]->mBones[p]->mNumWeights * sizeof(aiVertexWeight);

1024 }

1025 }

1026 in.meshes += (sizeof(aiFace) + 3 * sizeof(unsigned int))*mScene->mMeshes[i]->mNumFaces;

1027 }

1028 in.total += in.meshes;

1029

1030 // add all embedded textures

1031 for (unsigned int i = 0; i < mScene->mNumTextures;++i) {

1032 const aiTexture* pc = mScene->mTextures[i];

1033 in.textures += sizeof(aiTexture);

1034 if (pc->mHeight) {

1035 in.textures += 4 * pc->mHeight * pc->mWidth;

1036 }

1037 else in.textures += pc->mWidth;

1038 }

1039 in.total += in.textures;

1040

1041 // add all animations

1042 for (unsigned int i = 0; i < mScene->mNumAnimations;++i) {

1043 const aiAnimation* pc = mScene->mAnimations[i];

1044 in.animations += sizeof(aiAnimation);

1045

1046 // add all bone anims

1047 for (unsigned int a = 0; a < pc->mNumChannels; ++a) {

1048 const aiNodeAnim* pc2 = pc->mChannels[i];

1049 in.animations += sizeof(aiNodeAnim);

1050 in.animations += pc2->mNumPositionKeys * sizeof(aiVectorKey);

1051 in.animations += pc2->mNumScalingKeys * sizeof(aiVectorKey);

1052 in.animations += pc2->mNumRotationKeys * sizeof(aiQuatKey);

1053 }

1054 }

1055 in.total += in.animations;

1056

1057 // add all cameras and all lights

1058 in.total += in.cameras = sizeof(aiCamera) * mScene->mNumCameras;

1059 in.total += in.lights = sizeof(aiLight) * mScene->mNumLights;

1060

1061 // add all nodes

1062 AddNodeWeight(in.nodes,mScene->mRootNode);

1063 in.total += in.nodes;

1064

1065 // add all materials

1066 for (unsigned int i = 0; i < mScene->mNumMaterials;++i) {

1067 const aiMaterial* pc = mScene->mMaterials[i];

1068 in.materials += sizeof(aiMaterial);

1069 in.materials += pc->mNumAllocated * sizeof(void*);

1070

1071 for (unsigned int a = 0; a < pc->mNumProperties;++a) {

1072 in.materials += pc->mProperties[a]->mDataLength;

1073 }

1074 }

1075 in.total += in.materials;

1076 }

1077