2 files changed, 54 insertions, 4 deletions
diff --git a/indra/llprimitive/llgltfmaterial.cpp b/indra/llprimitive/llgltfmaterial.cpp
index f42c11ee21..6afd83904f 100644
--- a/indra/llprimitive/llgltfmaterial.cpp
+++ b/indra/llprimitive/llgltfmaterial.cpp
@@ -89,6 +89,11 @@ LLGLTFMaterial& LLGLTFMaterial::operator=(const LLGLTFMaterial& rhs)
     mOverrideDoubleSided = rhs.mOverrideDoubleSided;
     mOverrideAlphaMode = rhs.mOverrideAlphaMode;
 
+    mLocalTextureIds = rhs.mLocalTextureIds;
+    mLocalTextureTrackingIds = rhs.mLocalTextureTrackingIds;
+
+    updateTextureTracking();
+
     return *this;
 }
 
@@ -765,3 +770,44 @@ LLUUID LLGLTFMaterial::getHash() const
     return hash;
 }
 
+void LLGLTFMaterial::addLocalTextureTracking(const LLUUID& tracking_id, const LLUUID& tex_id)
+{
+    mLocalTextureTrackingIds.insert(tracking_id);
+    mLocalTextureIds.insert(tex_id);
+}
+
+void LLGLTFMaterial::removeLocalTextureTracking(const LLUUID& tracking_id, const LLUUID& tex_id)
+{
+    mLocalTextureTrackingIds.erase(tracking_id);
+    mLocalTextureIds.erase(tex_id);
+}
+
+bool LLGLTFMaterial::replaceLocalTexture(const LLUUID& old_id, const LLUUID& new_id)
+{
+    bool res = false;
+
+    for (int i = 0; i < GLTF_TEXTURE_INFO_COUNT; ++i)
+    {
+        if (mTextureId[i] == old_id)
+        {
+            mTextureId[i] = new_id;
+            res = true;
+        }
+    }
+
+    mLocalTextureIds.erase(old_id);
+    if (res)
+    {
+        mLocalTextureIds.insert(new_id);
+    }
+
+    return res;
+}
+
+void LLGLTFMaterial::updateTextureTracking()
+{
+    if (mLocalTextureTrackingIds.size() > 0)
+    {
+        LL_WARNS() << "copied a material with local textures, but tracking not implemented" << LL_ENDL;
+    }
+}
diff --git a/indra/llprimitive/llgltfmaterial.h b/indra/llprimitive/llgltfmaterial.h
index 548e2c52f4..d45ada1561 100644
--- a/indra/llprimitive/llgltfmaterial.h
+++ b/indra/llprimitive/llgltfmaterial.h
@@ -223,8 +223,14 @@ public:
     virtual void removeTextureEntry(LLTextureEntry* te) {};
 
     // For local textures so that editor will know to track changes
-    void setHasLocalTextures(bool val) { mHasLocalTextures = val; }
-    bool hasLocalTextures() { return mHasLocalTextures; }
+    void addLocalTextureTracking(const LLUUID& tracking_id, const LLUUID &tex_id);
+    void removeLocalTextureTracking(const LLUUID& tracking_id, const LLUUID& tex_id);
+    bool hasLocalTextures() { return !mLocalTextureIds.empty(); }
+    virtual bool replaceLocalTexture(const LLUUID &old_id, const LLUUID& new_id);
+    virtual void updateTextureTracking();
+
+    uuid_set_t mLocalTextureIds;
+    uuid_set_t mLocalTextureTrackingIds;
 
 protected:
     static LLVector2 vec2FromJson(const std::map<std::string, tinygltf::Value>& object, const char* key, const LLVector2& default_value);
@@ -242,6 +248,4 @@ protected:
     void writeToTexture(tinygltf::Model& model, T& texture_info, TextureInfo texture_info_id, bool force_write = false) const;
     template<typename T>
     static void writeToTexture(tinygltf::Model& model, T& texture_info, const LLUUID& texture_id, const TextureTransform& transform, bool force_write = false);
-
-    bool mHasLocalTextures;
 };