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1 | // Author: Kirill Gavrilov |
2 | // Copyright (c) 2016-2019 OPEN CASCADE SAS |
3 | // |
4 | // This file is part of Open CASCADE Technology software library. |
5 | // |
6 | // This library is free software; you can redistribute it and/or modify it under |
7 | // the terms of the GNU Lesser General Public License version 2.1 as published |
8 | // by the Free Software Foundation, with special exception defined in the file |
9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
10 | // distribution for complete text of the license and disclaimer of any warranty. |
11 | // |
12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
14 | |
15 | #include <RWGltf_CafReader.hxx> |
16 | |
17 | #include "RWGltf_GltfJsonParser.pxx" |
18 | #include <RWGltf_TriangulationReader.hxx> |
19 | |
20 | #include <BRep_Builder.hxx> |
21 | #include <BRep_Tool.hxx> |
22 | #include <Message.hxx> |
23 | #include <Message_Messenger.hxx> |
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24 | #include <Message_ProgressScope.hxx> |
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25 | #include <OSD_OpenFile.hxx> |
26 | #include <OSD_ThreadPool.hxx> |
27 | |
28 | #include <fstream> |
29 | |
30 | IMPLEMENT_STANDARD_RTTIEXT(RWGltf_CafReader, RWMesh_CafReader) |
31 | |
32 | //! Functor for parallel execution. |
33 | class RWGltf_CafReader::CafReader_GltfReaderFunctor |
34 | { |
35 | public: |
36 | |
37 | struct GltfReaderTLS |
38 | { |
39 | Handle(RWGltf_PrimitiveArrayReader) Reader; |
40 | }; |
41 | |
42 | //! Main constructor. |
43 | CafReader_GltfReaderFunctor (RWGltf_CafReader* myCafReader, |
44 | NCollection_Vector<TopoDS_Face>& theFaceList, |
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45 | const Message_ProgressRange& theProgress, |
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46 | const OSD_ThreadPool::Launcher& theThreadPool, |
47 | const TCollection_AsciiString& theErrPrefix) |
48 | : myCafReader (myCafReader), |
49 | myFaceList (&theFaceList), |
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50 | myErrPrefix (theErrPrefix), |
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51 | myProgress (theProgress, "Loading glTF triangulation", Max (1, theFaceList.Size())), |
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52 | myThreadPool(theThreadPool), |
53 | myTlsData (theThreadPool.LowerThreadIndex(), theThreadPool.UpperThreadIndex()) |
54 | { |
55 | // |
56 | } |
57 | |
58 | //! Execute task for a face with specified index. |
59 | void operator() (int theThreadIndex, |
60 | int theFaceIndex) const |
61 | { |
62 | GltfReaderTLS& aTlsData = myTlsData.ChangeValue (theThreadIndex); |
63 | if (aTlsData.Reader.IsNull()) |
64 | { |
65 | aTlsData.Reader = myCafReader->createMeshReaderContext(); |
66 | aTlsData.Reader->SetErrorPrefix (myErrPrefix); |
67 | aTlsData.Reader->SetCoordinateSystemConverter (myCafReader->myCoordSysConverter); |
68 | } |
69 | |
70 | TopLoc_Location aDummyLoc; |
71 | TopoDS_Face& aFace = myFaceList->ChangeValue (theFaceIndex); |
72 | Handle(RWGltf_GltfLatePrimitiveArray) aLateData = Handle(RWGltf_GltfLatePrimitiveArray)::DownCast (BRep_Tool::Triangulation (aFace, aDummyLoc)); |
73 | Handle(Poly_Triangulation) aPolyData = aTlsData.Reader->Load (aLateData); |
74 | BRep_Builder aBuilder; |
75 | aBuilder.UpdateFace (aFace, aPolyData); |
76 | |
77 | if (myThreadPool.HasThreads()) |
78 | { |
79 | Standard_Mutex::Sentry aLock (&myMutex); |
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80 | myProgress.Next(); |
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81 | } |
82 | else |
83 | { |
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84 | myProgress.Next(); |
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85 | } |
86 | } |
87 | |
88 | private: |
89 | |
90 | RWGltf_CafReader* myCafReader; |
91 | NCollection_Vector<TopoDS_Face>* myFaceList; |
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92 | TCollection_AsciiString myErrPrefix; |
93 | mutable Standard_Mutex myMutex; |
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94 | mutable Message_ProgressScope myProgress; |
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95 | const OSD_ThreadPool::Launcher& myThreadPool; |
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96 | mutable NCollection_Array1<GltfReaderTLS> myTlsData; |
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97 | }; |
98 | |
99 | //================================================================ |
100 | // Function : Constructor |
101 | // Purpose : |
102 | //================================================================ |
103 | RWGltf_CafReader::RWGltf_CafReader() |
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104 | : myToParallel (false), |
105 | myToSkipEmptyNodes (true), |
106 | myUseMeshNameAsFallback (true) |
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107 | { |
108 | myCoordSysConverter.SetInputLengthUnit (1.0); // glTF defines model in meters |
109 | myCoordSysConverter.SetInputCoordinateSystem (RWMesh_CoordinateSystem_glTF); |
110 | } |
111 | |
112 | //================================================================ |
113 | // Function : performMesh |
114 | // Purpose : |
115 | //================================================================ |
116 | Standard_Boolean RWGltf_CafReader::performMesh (const TCollection_AsciiString& theFile, |
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117 | const Message_ProgressRange& theProgress, |
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118 | const Standard_Boolean theToProbe) |
119 | { |
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120 | Message_ProgressScope aPSentry (theProgress, "Reading glTF", 2); |
121 | aPSentry.Show(); |
122 | |
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123 | std::ifstream aFile; |
124 | OSD_OpenStream (aFile, theFile.ToCString(), std::ios::in | std::ios::binary); |
125 | if (!aFile.is_open() |
126 | || !aFile.good()) |
127 | { |
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128 | Message::SendFail (TCollection_AsciiString ("File '") + theFile + "' is not found"); |
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129 | return false; |
130 | } |
131 | |
132 | bool isBinaryFile = false; |
133 | char aGlbHeader[12] = {}; |
134 | aFile.read (aGlbHeader, sizeof(aGlbHeader)); |
135 | int64_t aBinBodyOffset = 0; |
136 | int64_t aBinBodyLen = 0; |
137 | int64_t aJsonBodyOffset = 0; |
138 | int64_t aJsonBodyLen = 0; |
139 | if (::strncmp (aGlbHeader, "glTF", 4) == 0) |
140 | { |
141 | isBinaryFile = true; |
142 | const uint32_t* aVer = (const uint32_t* )(aGlbHeader + 4); |
143 | const uint32_t* aLen = (const uint32_t* )(aGlbHeader + 8); |
144 | if (*aVer == 1) |
145 | { |
146 | if (*aLen < 20) |
147 | { |
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148 | Message::SendFail (TCollection_AsciiString ("File '") + theFile + "' has broken glTF format"); |
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149 | return false; |
150 | } |
151 | |
152 | char aHeader1[8] = {}; |
153 | aFile.read (aHeader1, sizeof(aHeader1)); |
154 | |
155 | const uint32_t* aSceneLen = (const uint32_t* )(aHeader1 + 0); |
156 | const uint32_t* aSceneFormat = (const uint32_t* )(aHeader1 + 4); |
157 | aJsonBodyOffset = 20; |
158 | aJsonBodyLen = int64_t(*aSceneLen); |
159 | |
160 | aBinBodyOffset = aJsonBodyOffset + aJsonBodyLen; |
161 | aBinBodyLen = int64_t(*aLen) - aBinBodyOffset; |
162 | if (*aSceneFormat != 0) |
163 | { |
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164 | Message::SendFail (TCollection_AsciiString ("File '") + theFile + "' is written using unsupported Scene format"); |
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165 | return false; |
166 | } |
167 | } |
168 | else //if (*aVer == 2) |
169 | { |
170 | if (*aVer != 2) |
171 | { |
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172 | Message::SendWarning (TCollection_AsciiString ("File '") + theFile + "' is written using unknown version " + int(*aVer)); |
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173 | } |
174 | |
175 | for (int aChunkIter = 0; !aFile.eof() && aChunkIter < 2; ++aChunkIter) |
176 | { |
177 | char aChunkHeader2[8] = {}; |
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178 | if (int64_t(aFile.tellg()) + int64_t(sizeof(aChunkHeader2)) > int64_t(*aLen)) |
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179 | { |
180 | break; |
181 | } |
182 | |
183 | aFile.read (aChunkHeader2, sizeof(aChunkHeader2)); |
184 | if (!aFile.good()) |
185 | { |
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186 | Message::SendFail (TCollection_AsciiString ("File '") + theFile + "' is written using unsupported format"); |
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187 | return false; |
188 | } |
189 | |
190 | const uint32_t* aChunkLen = (const uint32_t* )(aChunkHeader2 + 0); |
191 | const uint32_t* aChunkType = (const uint32_t* )(aChunkHeader2 + 4); |
192 | if (*aChunkType == 0x4E4F534A) |
193 | { |
194 | aJsonBodyOffset = int64_t(aFile.tellg()); |
195 | aJsonBodyLen = int64_t(*aChunkLen); |
196 | } |
197 | else if (*aChunkType == 0x004E4942) |
198 | { |
199 | aBinBodyOffset = int64_t(aFile.tellg()); |
200 | aBinBodyLen = int64_t(*aChunkLen); |
201 | } |
202 | if (*aChunkLen != 0) |
203 | { |
204 | aFile.seekg (*aChunkLen, std::ios_base::cur); |
205 | } |
206 | } |
207 | |
208 | aFile.seekg ((std::streamoff )aJsonBodyOffset, std::ios_base::beg); |
209 | } |
210 | } |
211 | else |
212 | { |
213 | aFile.seekg (0, std::ios_base::beg); |
214 | } |
215 | |
216 | TCollection_AsciiString anErrPrefix = TCollection_AsciiString ("File '") + theFile + "' defines invalid glTF!\n"; |
217 | RWGltf_GltfJsonParser aDoc (myRootShapes); |
218 | aDoc.SetFilePath (theFile); |
219 | aDoc.SetProbeHeader (theToProbe); |
220 | aDoc.SetExternalFiles (myExternalFiles); |
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221 | aDoc.SetMetadata (myMetadata); |
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222 | aDoc.SetErrorPrefix (anErrPrefix); |
223 | aDoc.SetCoordinateSystemConverter (myCoordSysConverter); |
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224 | aDoc.SetSkipEmptyNodes (myToSkipEmptyNodes); |
225 | aDoc.SetMeshNameAsFallback (myUseMeshNameAsFallback); |
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226 | if (!theToProbe) |
227 | { |
228 | aDoc.SetAttributeMap (myAttribMap); |
229 | } |
230 | if (isBinaryFile) |
231 | { |
232 | aDoc.SetBinaryFormat (aBinBodyOffset, aBinBodyLen); |
233 | } |
234 | |
235 | #ifdef HAVE_RAPIDJSON |
236 | rapidjson::ParseResult aRes; |
237 | rapidjson::IStreamWrapper aFileStream (aFile); |
238 | if (isBinaryFile) |
239 | { |
240 | aRes = aDoc.ParseStream<rapidjson::kParseStopWhenDoneFlag, rapidjson::UTF8<>, rapidjson::IStreamWrapper> (aFileStream); |
241 | } |
242 | else |
243 | { |
244 | aRes = aDoc.ParseStream (aFileStream); |
245 | } |
246 | if (aRes.IsError()) |
247 | { |
248 | if (aRes.Code() == rapidjson::kParseErrorDocumentEmpty) |
249 | { |
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250 | Message::SendFail (TCollection_AsciiString ("File '") + theFile + "' is empty"); |
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251 | return false; |
252 | } |
253 | TCollection_AsciiString anErrDesc (RWGltf_GltfJsonParser::FormatParseError (aRes.Code())); |
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254 | Message::SendFail (TCollection_AsciiString ("File '") + theFile + "' defines invalid JSON document!\n" |
255 | + anErrDesc + " [at offset " + (int )aRes.Offset() + "]."); |
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256 | return false; |
257 | } |
258 | #endif |
259 | |
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260 | if (!aDoc.Parse (aPSentry.Next())) |
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261 | { |
262 | return false; |
263 | } |
264 | |
265 | if (!theToProbe |
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266 | && !readLateData (aDoc.FaceList(), theFile, aPSentry.Next())) |
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267 | { |
268 | return false; |
269 | } |
270 | |
271 | return true; |
272 | } |
273 | |
274 | //================================================================ |
275 | // Function : createMeshReaderContext |
276 | // Purpose : |
277 | //================================================================ |
278 | Handle(RWGltf_PrimitiveArrayReader) RWGltf_CafReader::createMeshReaderContext() |
279 | { |
280 | Handle(RWGltf_TriangulationReader) aReader = new RWGltf_TriangulationReader(); |
281 | return aReader; |
282 | } |
283 | |
284 | //================================================================ |
285 | // Function : readLateData |
286 | // Purpose : |
287 | //================================================================ |
288 | Standard_Boolean RWGltf_CafReader::readLateData (NCollection_Vector<TopoDS_Face>& theFaces, |
289 | const TCollection_AsciiString& theFile, |
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290 | const Message_ProgressRange& theProgress) |
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291 | { |
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292 | const Handle(OSD_ThreadPool)& aThreadPool = OSD_ThreadPool::DefaultPool(); |
293 | const int aNbThreads = myToParallel ? Min (theFaces.Size(), aThreadPool->NbDefaultThreadsToLaunch()) : 1; |
294 | OSD_ThreadPool::Launcher aLauncher (*aThreadPool, aNbThreads); |
295 | |
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296 | CafReader_GltfReaderFunctor aFunctor (this, theFaces, theProgress, aLauncher, |
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297 | TCollection_AsciiString ("File '") + theFile + "' defines invalid glTF!\n"); |
298 | aLauncher.Perform (theFaces.Lower(), theFaces.Upper() + 1, aFunctor); |
299 | return Standard_True; |
300 | } |