#4191 skip loading model compressed with Draco

indra/newview/gltf/asset.cpp

@@ -50,6 +50,10 @@ namespace LL
             "KHR_texture_transform"
         };
 
+        static std::unordered_set<std::string> ExtensionsIgnored = {
+            "KHR_materials_pbrSpecularGlossiness"
+        };
+
         Material::AlphaMode gltf_alpha_mode_to_enum(const std::string& alpha_mode)
         {
             if (alpha_mode == "OPAQUE")
@@ -494,10 +498,21 @@ bool Asset::prep()
     {
         if (ExtensionsSupported.find(extension) == ExtensionsSupported.end())
         {
-            LL_WARNS() << "Unsupported extension: " << extension << LL_ENDL;
-            mUnsupportedExtensions.push_back(extension);
+            if (ExtensionsIgnored.find(extension) == ExtensionsIgnored.end())
+            {
+                LL_WARNS() << "Unsupported extension: " << extension << LL_ENDL;
+                mUnsupportedExtensions.push_back(extension);
+            }
+            else
+            {
+                mIgnoredExtensions.push_back(extension);
+            }
         }
     }
+    if (mUnsupportedExtensions.size() > 0)
+    {
+        return false;
+    }
 
     // do buffers first as other resources depend on them
     for (auto& buffer : mBuffers)

indra/newview/gltf/asset.h

@@ -397,6 +397,7 @@ namespace LL
             bool mLoadIntoVRAM = false;
 
             std::vector<std::string> mUnsupportedExtensions;
+            std::vector<std::string> mIgnoredExtensions;
 
             // prepare for first time use
             bool prep();

indra/newview/gltf/llgltfloader.cpp

@@ -111,8 +111,6 @@ LLGLTFLoader::~LLGLTFLoader() {}
 bool LLGLTFLoader::OpenFile(const std::string &filename)
 {
     tinygltf::TinyGLTF loader;
-    std::string        error_msg;
-    std::string        warn_msg;
     std::string filename_lc(filename);
     LLStringUtil::toLower(filename_lc);
 
@@ -120,28 +118,11 @@ bool LLGLTFLoader::OpenFile(const std::string &filename)
 
     if (!mGltfLoaded)
     {
-        if (!warn_msg.empty())
-            LL_WARNS("GLTF_IMPORT") << "gltf load warning: " << warn_msg.c_str() << LL_ENDL;
-        if (!error_msg.empty())
-            LL_WARNS("GLTF_IMPORT") << "gltf load error: " << error_msg.c_str() << LL_ENDL;
+        notifyUnsupportedExtension(true);
         return false;
     }
 
-    if (mGLTFAsset.mUnsupportedExtensions.size() > 0)
-    {
-        LLSD args;
-        args["Message"] = "UnsupportedExtension";
-        std::string del;
-        std::string ext;
-        for (auto& extension : mGLTFAsset.mUnsupportedExtensions)
-        {
-            ext += del;
-            ext += extension;
-            del = ",";
-        }
-        args["EXT"] = ext;
-        mWarningsArray.append(args);
-    }
+    notifyUnsupportedExtension(false);
 
     mMeshesLoaded = parseMeshes();
     if (mMeshesLoaded) uploadMeshes();
@@ -1347,3 +1328,23 @@ LLUUID LLGLTFLoader::imageBufferToTextureUUID(const gltf_texture& tex)
     return LLUUID::null;
 }
 
+void LLGLTFLoader::notifyUnsupportedExtension(bool unsupported)
+{
+    std::vector<std::string> extensions = unsupported ? mGLTFAsset.mUnsupportedExtensions : mGLTFAsset.mIgnoredExtensions;
+    if (extensions.size() > 0)
+    {
+        LLSD args;
+        args["Message"] = unsupported ? "UnsupportedExtension" : "IgnoredExtension";
+        std::string del;
+        std::string ext;
+        for (auto& extension : extensions)
+        {
+            ext += del;
+            ext += extension;
+            del = ",";
+        }
+        args["EXT"] = ext;
+        mWarningsArray.append(args);
+    }
+}
+

indra/newview/gltf/llgltfloader.h

@@ -174,6 +174,8 @@ private:
     S32 findGLTFRootJoint(const LL::GLTF::Skin& gltf_skin) const; // if there are multiple roots, gltf stores them under one commor joint
     LLUUID imageBufferToTextureUUID(const gltf_texture& tex);
 
+    void notifyUnsupportedExtension(bool unsupported);
+
     //    bool mPreprocessGLTF;
 
     /*  Below inherited from dae loader - unknown if/how useful here

indra/newview/skins/default/xui/en/floater_model_preview.xml

@@ -62,7 +62,8 @@
   <string name="ParsingErrorNoScene">Document has no visual_scene</string>
   <string name="ParsingErrorPositionInvalidModel">Unable to process mesh without position data. Invalid model.</string>
   <string name="InvalidGeometryNonTriangulated">Invalid geometry: GLTF files must contain triangulated meshes only.</string>
-  <string name="UnsupportedExtension">Model uses unsupported extension, related material properties are ignored: [EXT]</string>
+  <string name="IgnoredExtension">Model uses unsupported extension: [EXT], related material properties are ignored.</string>
+  <string name="UnsupportedExtension">Unable to load a model, unsupported extension: [EXT]</string>
 
   <panel
     follows="top|left"