Add Copyright common metadata to glTF importer/exporter

Technically this only exists in glTF v2 but may as well include in both

code/glTF/glTFAssetWriter.inl

@@ -627,6 +627,9 @@ namespace glTF {
         asset.SetObject();
         asset.AddMember("version", Value(mAsset.asset.version, mAl).Move(), mAl);
         asset.AddMember("generator", Value(mAsset.asset.generator, mAl).Move(), mAl);
+        if (!mAsset.asset.copyright.empty())
+            asset.AddMember("copyright", Value(mAsset.asset.copyright, mAl).Move(), mAl);
+
         mDoc.AddMember("asset", asset, mAl);
     }
 

code/glTF/glTFExporter.cpp

@@ -46,6 +46,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "glTF/glTFAssetWriter.h"
 #include "PostProcessing/SplitLargeMeshes.h"
 
+#include <assimp/commonMetaData.h>
 #include <assimp/Exceptional.h>
 #include <assimp/StringComparison.h>
 #include <assimp/ByteSwapper.h>
@@ -873,6 +874,12 @@ void glTFExporter::ExportMetadata()
         aiGetVersionMajor(), aiGetVersionMinor(), aiGetVersionRevision());
 
     asset.generator = buffer;
+
+	// Copyright
+	aiString copyright_str;
+	if (mScene->mMetaData->Get(AI_METADATA_SOURCE_COPYRIGHT, copyright_str)) {
+		asset.copyright = copyright_str.C_Str();
+	}
 }
 
 inline void ExtractAnimationData(Asset& mAsset, std::string& animId, Ref<Animation>& animRef, Ref<Buffer>& buffer, const aiNodeAnim* nodeChannel, float ticksPerSecond)

code/glTF/glTFImporter.cpp

@@ -703,7 +703,8 @@ void glTFImporter::ImportCommonMetadata(glTF::Asset& a)
     ai_assert(mScene->mMetaData == nullptr);
     const bool hasVersion = !a.asset.version.empty();
     const bool hasGenerator = !a.asset.generator.empty();
-    if (hasVersion || hasGenerator)
+    const bool hasCopyright = !a.asset.copyright.empty();
+    if (hasVersion || hasGenerator || hasCopyright)
     {
         mScene->mMetaData = new aiMetadata;
         if (hasVersion)
@@ -714,6 +715,10 @@ void glTFImporter::ImportCommonMetadata(glTF::Asset& a)
         {
             mScene->mMetaData->Add(AI_METADATA_SOURCE_GENERATOR, aiString(a.asset.generator));
         }
+        if (hasCopyright)
+        {
+            mScene->mMetaData->Add(AI_METADATA_SOURCE_COPYRIGHT, aiString(a.asset.copyright));
+        }
     }
 }
 

code/glTF2/glTF2AssetWriter.inl

@@ -720,6 +720,8 @@ namespace glTF2 {
         asset.SetObject();
         asset.AddMember("version", Value(mAsset.asset.version, mAl).Move(), mAl);
         asset.AddMember("generator", Value(mAsset.asset.generator, mAl).Move(), mAl);
+        if (!mAsset.asset.copyright.empty())
+            asset.AddMember("copyright", Value(mAsset.asset.copyright, mAl).Move(), mAl);
         mDoc.AddMember("asset", asset, mAl);
     }
 

code/glTF2/glTF2Exporter.cpp

@@ -46,6 +46,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "glTF2/glTF2AssetWriter.h"
 #include "PostProcessing/SplitLargeMeshes.h"
 
+#include <assimp/commonMetaData.h>
 #include <assimp/Exceptional.h>
 #include <assimp/StringComparison.h>
 #include <assimp/ByteSwapper.h>
@@ -996,6 +997,12 @@ void glTF2Exporter::ExportMetadata()
         aiGetVersionMajor(), aiGetVersionMinor(), aiGetVersionRevision());
 
     asset.generator = buffer;
+
+    // Copyright
+	aiString copyright_str;
+	if (mScene->mMetaData->Get(AI_METADATA_SOURCE_COPYRIGHT, copyright_str)) {
+        asset.copyright = copyright_str.C_Str();
+	}
 }
 
 inline Ref<Accessor> GetSamplerInputRef(Asset& asset, std::string& animId, Ref<Buffer>& buffer, std::vector<float>& times)

code/glTF2/glTF2Importer.cpp

@@ -1306,7 +1306,8 @@ void glTF2Importer::ImportCommonMetadata(glTF2::Asset& a) {
     ai_assert(mScene->mMetaData == nullptr);
     const bool hasVersion = !a.asset.version.empty();
     const bool hasGenerator = !a.asset.generator.empty();
-    if (hasVersion || hasGenerator)
+    const bool hasCopyright = !a.asset.copyright.empty();
+    if (hasVersion || hasGenerator || hasCopyright)
     {
         mScene->mMetaData = new aiMetadata;
         if (hasVersion)
@@ -1317,6 +1318,10 @@ void glTF2Importer::ImportCommonMetadata(glTF2::Asset& a) {
         {
             mScene->mMetaData->Add(AI_METADATA_SOURCE_GENERATOR, aiString(a.asset.generator));
         }
+        if (hasCopyright)
+        {
+            mScene->mMetaData->Add(AI_METADATA_SOURCE_COPYRIGHT, aiString(a.asset.copyright));
+        }
     }
 }