1 files changed, 120 insertions, 0 deletions
diff --git a/indra/newview/gltf/accessor.h b/indra/newview/gltf/accessor.h
new file mode 100644
index 0000000000..ec68c5f624
--- /dev/null
+++ b/indra/newview/gltf/accessor.h
@@ -0,0 +1,120 @@
+#pragma once
+
+/**
+ * @file asset.h
+ * @brief LL GLTF Implementation
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llstrider.h"
+#include "boost/json.hpp"
+
+#include "common.h"
+
+// LL GLTF Implementation
+namespace LL
+{
+    namespace GLTF
+    {
+        constexpr S32 INVALID_INDEX = -1;
+
+        class Buffer
+        {
+        public:
+            std::vector<U8> mData;
+            std::string mName;
+            std::string mUri;
+            S32 mByteLength = 0;
+
+            // erase the given range from this buffer.
+            // also updates all buffer views in given asset that reference this buffer
+            void erase(Asset& asset, S32 offset, S32 length);
+
+            bool prep(Asset& asset);
+
+            void serialize(boost::json::object& obj) const;
+            const Buffer& operator=(const Value& value);
+
+            bool save(Asset& asset, const std::string& folder);
+        };
+
+        class BufferView
+        {
+        public:
+            S32 mBuffer = INVALID_INDEX;
+            S32 mByteLength = 0;
+            S32 mByteOffset = 0;
+            S32 mByteStride = 0;
+            S32 mTarget = -1;
+
+            std::string mName;
+
+            void serialize(boost::json::object& obj) const;
+            const BufferView& operator=(const Value& value);
+        };
+
+        class Accessor
+        {
+        public:
+            enum class Type : U8
+            {
+                SCALAR,
+                VEC2,
+                VEC3,
+                VEC4,
+                MAT2,
+                MAT3,
+                MAT4
+            };
+
+            enum class ComponentType : U32
+            {
+                BYTE = 5120,
+                UNSIGNED_BYTE = 5121,
+                SHORT = 5122,
+                UNSIGNED_SHORT = 5123,
+                UNSIGNED_INT = 5125,
+                FLOAT = 5126
+            };
+
+            std::vector<double> mMax;
+            std::vector<double> mMin;
+            std::string mName;
+            S32 mBufferView = INVALID_INDEX;
+            S32 mByteOffset = 0;
+            ComponentType mComponentType = ComponentType::BYTE;
+            S32 mCount = 0;
+            Type mType = Type::SCALAR;
+            bool mNormalized = false;
+
+            void serialize(boost::json::object& obj) const;
+            const Accessor& operator=(const Value& value);
+        };
+
+        // convert from "SCALAR", "VEC2", etc to Accessor::Type
+        Accessor::Type gltf_type_to_enum(const std::string& type);
+
+        // convert from Accessor::Type to "SCALAR", "VEC2", etc
+        std::string enum_to_gltf_type(Accessor::Type type);
+    }
+}