Implementing glTF 1.0 parser

chrome/browser/android/vr_shell/gltf_parser.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_ANDROID_VR_SHELL_GLTF_PARSER_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_GLTF_PARSER_H_
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+#include "base/values.h"
+#include "chrome/browser/android/vr_shell/gltf_asset.h"
+
+namespace vr_shell {
+
+// Parser for glTF 1.0 specification

[mthiesse, 2017/03/21 20:24:37]

Add a strongly worded comment here saying that this definitely should not be
used for untrusted glTF models (should only be used by models we create, that
are thoroughly tested), and mention what parts of the spec are and are not
supported in this parser.

[acondor_, 2017/03/22 16:25:28]

Done.

+// https://github.com/KhronosGroup/glTF/tree/master/specification/1.0
+// TODO(acondor): Implement glTF 2.0 parser. gltf::Asset is mostly version
+// agnostic.
+class GltfParser {
+ public:
+  GltfParser();
+  ~GltfParser();
+  std::unique_ptr<gltf::Asset> Parse(const base::DictionaryValue& dict);
+
+ private:
+  bool SetBuffers(const base::DictionaryValue& dict);
+  bool SetBufferViews(const base::DictionaryValue& dict);
+  bool SetAccessors(const base::DictionaryValue& dict);
+  bool SetMeshes(const base::DictionaryValue& dict);
+  bool SetNodes(const base::DictionaryValue& dict);
+  bool SetScenes(const base::DictionaryValue& dict);
+  std::unique_ptr<gltf::Mesh::Primitive> ProcessPrimitive(
+      const base::DictionaryValue& dict);
+
+  std::unique_ptr<gltf::Asset> asset_;
+  std::unordered_map<std::string, std::size_t> buffer_ids_;
+  std::unordered_map<std::string, std::size_t> buffer_view_ids_;
+  std::unordered_map<std::string, std::size_t> accessor_ids_;
+  std::unordered_map<std::string, std::size_t> node_ids_;
+  std::unordered_map<std::string, std::size_t> mesh_ids_;
+  std::unordered_map<std::string, std::size_t> scene_ids_;
+
+  DISALLOW_COPY_AND_ASSIGN(GltfParser);
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_GLTF_PARSER_H_