0031312: Data Exchange - RWGltf_CafReader fails reading texture embedded into base64...

RWGltf_GltfJsonParser::gltfParseTexture() now handles images embedded into bufferView of non-glb file.

diff --git a/src/RWGltf/RWGltf_GltfJsonParser.cxx b/src/RWGltf/RWGltf_GltfJsonParser.cxx
index b43a3eb..89feb12 100644 (file)
--- a/src/RWGltf/RWGltf_GltfJsonParser.cxx
+++ b/src/RWGltf/RWGltf_GltfJsonParser.cxx
@@ -37,6 +37,20 @@ namespace
   //! Material extension.
   const char THE_KHR_materials_common[] = "KHR_materials_common";
   const char THE_KHR_binary_glTF[]      = "KHR_binary_glTF";
+
+  //! Data buffer referring to a portion of another buffer.
+  class RWGltf_SubBuffer : public NCollection_Buffer
+  {
+  public:
+    RWGltf_SubBuffer (const Handle(NCollection_Buffer)& theBase,
+                      Standard_Size theOffset,
+                      Standard_Size theLength)
+    : NCollection_Buffer (Handle(NCollection_BaseAllocator)(), theLength, theBase->ChangeData() + theOffset),
+      myBaseBuffer (theBase) {}
+
+  private:
+    Handle(NCollection_Buffer) myBaseBuffer;
+  };
 }
 
 //! Find member of the object in a safe way.
@@ -736,15 +750,11 @@ bool RWGltf_GltfJsonParser::gltfParseTexture (Handle(Image_Texture)& theTexture,
 
     if (aBinVal != NULL)
     {
-      //const RWGltf_JsonValue* aMimeTypeVal = findObjectMember (*aBinVal, "mimeType");
-      //const RWGltf_JsonValue* aWidthVal    = findObjectMember (*aBinVal, "width");
-      //const RWGltf_JsonValue* aHeightVal   = findObjectMember (*aBinVal, "height");
       if (aBufferViewName == NULL)
       {
         reportGltfWarning ("Invalid texture node '" + aTextureId + "' points to invalid data source.");
         return false;
       }
-
       const RWGltf_JsonValue* aBufferView = myGltfRoots[RWGltf_GltfRootElement_BufferViews].FindChild (*aBufferViewName);
       if (aBufferView == NULL
       || !aBufferView->IsObject())
@@ -752,47 +762,33 @@ bool RWGltf_GltfJsonParser::gltfParseTexture (Handle(Image_Texture)& theTexture,
         reportGltfWarning ("Invalid texture node '" + aTextureId + "' points to invalid buffer view '" + getKeyString (*aBufferViewName) + "'.");
         return false;
       }
+      return gltfParseTexturInGlbBuffer (theTexture, *aBinVal, getKeyString (*aBufferViewName), *aBufferView);
+    }
+  }
 
-      const RWGltf_JsonValue* aBufferName = findObjectMember (*aBufferView, "buffer");
-      const RWGltf_JsonValue* aByteLength = findObjectMember (*aBufferView, "byteLength");
-      const RWGltf_JsonValue* aByteOffset = findObjectMember (*aBufferView, "byteOffset");
-      if (aBufferName != NULL
-      &&  aBufferName->IsString()
-      && !IsEqual (aBufferName->GetString(), "binary_glTF"))
-      {
-        reportGltfError ("BufferView '" + getKeyString (*aBufferViewName) + "' does not define binary_glTF buffer.");
-        return false;
-      }
-
-      RWGltf_GltfBufferView aBuffView;
-      aBuffView.ByteOffset = aByteOffset != NULL && aByteOffset->IsNumber()
-                           ? (int64_t )aByteOffset->GetDouble()
-                           : 0;
-      aBuffView.ByteLength = aByteLength != NULL && aByteLength->IsNumber()
-                           ? (int64_t )aByteLength->GetDouble()
-                           : 0;
-      if (aBuffView.ByteLength < 0)
-      {
-        reportGltfError ("BufferView '" + getKeyString (*aBufferViewName) + "' defines invalid byteLength.");
-        return false;
-      }
-      else if (aBuffView.ByteOffset < 0)
-      {
-        reportGltfError ("BufferView '" + getKeyString (*aBufferViewName) + "' defines invalid byteOffset.");
-        return false;
-      }
-
+  const RWGltf_JsonValue* anUriVal = findObjectMember (*anImgNode, "uri");
+  if (anUriVal == NULL)
+  {
+    const RWGltf_JsonValue* aBufferViewName = findObjectMember (*anImgNode, "bufferView");
+    if (aBufferViewName == NULL)
+    {
+      reportGltfWarning ("Invalid texture node '" + aTextureId + "' points to invalid data source.");
+      return false;
+    }
 
-      const int64_t anOffset = myBinBodyOffset + aBuffView.ByteOffset;
-      theTexture = new Image_Texture (myFilePath, anOffset, aBuffView.ByteLength);
-      return true;
+    const RWGltf_JsonValue* aBufferView = myGltfRoots[RWGltf_GltfRootElement_BufferViews].FindChild (*aBufferViewName);
+    if (aBufferView == NULL
+    || !aBufferView->IsObject())
+    {
+      reportGltfWarning ("Invalid texture node '" + aTextureId + "' points to invalid buffer view '" + getKeyString (*aBufferViewName) + "'.");
+      return false;
     }
+    return gltfParseTextureInBufferView (theTexture, getKeyString (*aSrcVal), getKeyString (*aBufferViewName), *aBufferView);
   }
 
-  const RWGltf_JsonValue* anUriVal = findObjectMember (*anImgNode, "uri");
-  if (anUriVal == NULL
-  || !anUriVal->IsString())
+  if (!anUriVal->IsString())
   {
+    reportGltfWarning ("Invalid texture node '" + aTextureId + "' points to invalid data source.");
     return false;
   }
 
@@ -827,6 +823,150 @@ bool RWGltf_GltfJsonParser::gltfParseTexture (Handle(Image_Texture)& theTexture,
   return true;
 }
 
+// =======================================================================
+// function : gltfParseTexturInGlbBuffer
+// purpose  :
+// =======================================================================
+bool RWGltf_GltfJsonParser::gltfParseTexturInGlbBuffer (Handle(Image_Texture)& theTexture,
+                                                        const RWGltf_JsonValue& theBinVal,
+                                                        const TCollection_AsciiString& theBufferViewId,
+                                                        const RWGltf_JsonValue& theBufferView)
+{
+  const RWGltf_JsonValue* aMimeTypeVal = findObjectMember (theBinVal, "mimeType");
+  //const RWGltf_JsonValue* aWidthVal    = findObjectMember (theBinVal, "width");
+  //const RWGltf_JsonValue* aHeightVal   = findObjectMember (theBinVal, "height");
+  (void )aMimeTypeVal;
+
+  const RWGltf_JsonValue* aBufferName = findObjectMember (theBufferView, "buffer");
+  const RWGltf_JsonValue* aByteLength = findObjectMember (theBufferView, "byteLength");
+  const RWGltf_JsonValue* aByteOffset = findObjectMember (theBufferView, "byteOffset");
+  if (aBufferName != NULL
+  &&  aBufferName->IsString()
+  && !IsEqual (aBufferName->GetString(), "binary_glTF"))
+  {
+    reportGltfError ("BufferView '" + theBufferViewId + "' does not define binary_glTF buffer.");
+    return false;
+  }
+
+  RWGltf_GltfBufferView aBuffView;
+  aBuffView.ByteOffset = aByteOffset != NULL && aByteOffset->IsNumber()
+                       ? (int64_t )aByteOffset->GetDouble()
+                       : 0;
+  aBuffView.ByteLength = aByteLength != NULL && aByteLength->IsNumber()
+                       ? (int64_t )aByteLength->GetDouble()
+                       : 0;
+  if (aBuffView.ByteLength <= 0)
+  {
+    reportGltfError ("BufferView '" + theBufferViewId + "' defines invalid byteLength.");
+    return false;
+  }
+  else if (aBuffView.ByteOffset < 0)
+  {
+    reportGltfError ("BufferView '" + theBufferViewId + "' defines invalid byteOffset.");
+    return false;
+  }
+
+  const int64_t anOffset = myBinBodyOffset + aBuffView.ByteOffset;
+  theTexture = new Image_Texture (myFilePath, anOffset, aBuffView.ByteLength);
+  return true;
+}
+
+// =======================================================================
+// function : gltfParseTextureInBufferView
+// purpose  :
+// =======================================================================
+bool RWGltf_GltfJsonParser::gltfParseTextureInBufferView (Handle(Image_Texture)& theTexture,
+                                                          const TCollection_AsciiString& theSourceId,
+                                                          const TCollection_AsciiString& theBufferViewId,
+                                                          const RWGltf_JsonValue& theBufferView)
+{
+  const RWGltf_JsonValue* aBufferName = findObjectMember (theBufferView, "buffer");
+  const RWGltf_JsonValue* aByteLength = findObjectMember (theBufferView, "byteLength");
+  const RWGltf_JsonValue* aByteOffset = findObjectMember (theBufferView, "byteOffset");
+  if (aBufferName == NULL)
+  {
+    reportGltfError ("BufferView '" + theBufferViewId + "' does not define buffer.");
+    return false;
+  }
+
+  const TCollection_AsciiString aBufferId = getKeyString (*aBufferName);
+  const RWGltf_JsonValue* aBuffer = myGltfRoots[RWGltf_GltfRootElement_Buffers].FindChild (*aBufferName);
+  if (aBuffer == NULL
+  || !aBuffer->IsObject())
+  {
+    reportGltfError ("BufferView '" + theBufferViewId + "' refers to non-existing buffer.");
+    return false;
+  }
+
+  RWGltf_GltfBufferView aBuffView;
+  aBuffView.ByteOffset = aByteOffset != NULL && aByteOffset->IsNumber()
+                       ? (int64_t )aByteOffset->GetDouble()
+                       : 0;
+  aBuffView.ByteLength = aByteLength != NULL && aByteLength->IsNumber()
+                       ? (int64_t )aByteLength->GetDouble()
+                       : 0;
+  if (aBuffView.ByteLength <= 0)
+  {
+    reportGltfError ("BufferView '" + theBufferViewId + "' defines invalid byteLength.");
+    return false;
+  }
+  else if (aBuffView.ByteOffset < 0)
+  {
+    reportGltfError ("BufferView '" + theBufferViewId + "' defines invalid byteOffset.");
+    return false;
+  }
+
+  const RWGltf_JsonValue* anUriVal = findObjectMember (*aBuffer, "uri");
+  if (anUriVal == NULL
+  || !anUriVal->IsString())
+  {
+    reportGltfError ("Buffer '" + aBufferId + "' does not define uri.");
+    return false;
+  }
+
+  const char* anUriData = anUriVal->GetString();
+  if (::strncmp (anUriData, "data:application/octet-stream;base64,", 37) == 0)
+  {
+    Handle(NCollection_Buffer) aBaseBuffer;
+    if (!myDecodedBuffers.Find (aBufferId, aBaseBuffer))
+    {
+      aBaseBuffer = FSD_Base64Decoder::Decode ((const Standard_Byte* )anUriData + 37, anUriVal->GetStringLength() - 37);
+      myDecodedBuffers.Bind (aBufferId, aBaseBuffer);
+    }
+
+    Handle(RWGltf_SubBuffer) aSubBuffer = new RWGltf_SubBuffer (aBaseBuffer, (Standard_Size )aBuffView.ByteOffset, (Standard_Size )aBuffView.ByteLength);
+    theTexture = new Image_Texture (aSubBuffer, myFilePath + "@" + theSourceId);
+    return true;
+  }
+
+  const TCollection_AsciiString anUri (anUriData);
+  if (anUri.IsEmpty())
+  {
+    reportGltfError ("Buffer '" + aBufferId + "' does not define uri.");
+    return false;
+  }
+
+  const TCollection_AsciiString aPath = myFolder + anUri;
+  bool isFileExist = false;
+  if (!myProbedFiles.Find (aPath, isFileExist))
+  {
+    isFileExist = OSD_File (aPath).Exists();
+    myProbedFiles.Bind (aPath, isFileExist);
+  }
+  if (!isFileExist)
+  {
+    reportGltfError ("Buffer '" + aBufferId + "' refers to non-existing file '" + anUri + "'.");
+    return false;
+  }
+
+  theTexture = new Image_Texture (aPath, aBuffView.ByteOffset, aBuffView.ByteLength);
+  if (myExternalFiles != NULL)
+  {
+    myExternalFiles->Add (aPath);
+  }
+  return true;
+}
+
 // =======================================================================
 // function : gltfParseScene
 // purpose  :
@@ -1548,7 +1688,7 @@ bool RWGltf_GltfJsonParser::gltfParseBufferView (const Handle(RWGltf_GltfLatePri
     }
   }
 
-  if (aBuffView.ByteLength < 0)
+  if (aBuffView.ByteLength <= 0)
   {
     reportGltfError ("BufferView '" + theName + "' defines invalid byteLength.");
     return false;

diff --git a/src/RWGltf/RWGltf_GltfJsonParser.pxx b/src/RWGltf/RWGltf_GltfJsonParser.pxx
index 1e4e241..9ea399b 100644 (file)
--- a/src/RWGltf/RWGltf_GltfJsonParser.pxx
+++ b/src/RWGltf/RWGltf_GltfJsonParser.pxx
@@ -150,6 +150,18 @@ protected:
   Standard_EXPORT bool gltfParseTexture (Handle(Image_Texture)& theTexture,
                                          const RWGltf_JsonValue* theTextureId);
 
+  //! Parse texture definition in binary buffer of GLB file.
+  Standard_EXPORT bool gltfParseTexturInGlbBuffer (Handle(Image_Texture)& theTexture,
+                                                   const RWGltf_JsonValue& theBinVal,
+                                                   const TCollection_AsciiString& theBufferViewId,
+                                                   const RWGltf_JsonValue& theBufferViewName);
+
+  //! Parse texture definition in binary buffer of glTF file.
+  Standard_EXPORT bool gltfParseTextureInBufferView (Handle(Image_Texture)& theTexture,
+                                                     const TCollection_AsciiString& theSourceId,
+                                                     const TCollection_AsciiString& theBufferViewhId,
+                                                     const RWGltf_JsonValue& theBufferView);
+
   //! Bind material definition to the map.
   Standard_EXPORT void gltfBindMaterial (const Handle(RWGltf_MaterialMetallicRoughness)& theMatPbr,
                                          const Handle(RWGltf_MaterialCommon)& theMatCommon);

diff --git a/tests/de_mesh/gltf_read/cubeemb b/tests/de_mesh/gltf_read/cubeemb
new file mode 100644 (file)
index 0000000..67961d1
--- /dev/null
+++ b/tests/de_mesh/gltf_read/cubeemb
@@ -0,0 +1,44 @@
+puts "========"
+puts "0031312: Data Exchange - RWGltf_CafReader fails reading texture embedded into base64 bufferView"
+puts "========"
+
+# glTF file content
+set cubeGltf {
+{
+"asset":{"generator":"","version":"2.0"},
+"scene":0,
+"scenes":[{"name":"Scene","nodes":[0]}],
+"nodes":[{"mesh":0,"name":"Cube"}],
+"materials":[{"name":"Material","pbrMetallicRoughness":{"baseColorTexture":{"index":0,"texCoord":0},"metallicFactor":0,"roughnessFactor":0.4}}],
+"meshes":[{"name":"Cube","primitives":[{"attributes":{"POSITION":0,"NORMAL":1,"TEXCOORD_0":2},"indices":3,"material":0}]}],
+"textures":[{"source":0}],
+"images":[{"bufferView":4,"mimeType":"image/jpeg","name":"UVGrid"}],
+"accessors":[
+{"bufferView":0,"componentType":5126,"count":24,"type":"VEC3"},
+{"bufferView":1,"componentType":5126,"count":24,"type":"VEC3"},
+{"bufferView":2,"componentType":5126,"count":24,"type":"VEC2"},
+{"bufferView":3,"componentType":5123,"count":36,"type":"SCALAR"}
+],
+"bufferViews":[
+{"buffer":0,"byteLength":288,"byteOffset":0},
+{"buffer":0,"byteLength":288,"byteOffset":288},
+{"buffer":0,"byteLength":192,"byteOffset":576},
+{"buffer":0,"byteLength":72,"byteOffset":768},
+{"buffer":0,"byteLength":2870,"byteOffset":840}
+],
+"buffers":[{
+"byteLength":3712,
+"uri":"data:application/octet-stream;base64,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"
+}]
+}
+}
+
+set fd [open ${imagedir}/${casename}.gltf w]
+fconfigure $fd -translation lf
+puts $fd $cubeGltf
+close $fd
+
+ReadGltf D ${imagedir}/${casename}.gltf
+XGetOneShape s D
+checknbshapes s -face 1 -compound 0
+checktrinfo s -tri 12 -nod 24