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
+// https://github.com/KhronosGroup/glTF/tree/master/specification/1.0
+// Supported objects are limited to: buffers, bufferViews, accessors,
+// meshes (limited), nodes (limited), scenes (limited).
+// Non-supported objects include: materials, techniques, skins, shaders,
+// programs, animations, cameras, images, textures, extensions.
+// This parser is not intended to be used on user or third-party data,
+// but only on thoroughly tested Chromium-defined files.

[mthiesse, 2017/03/22 18:53:43]

nit: s/Chromium-defined/Chromium resource/

[acondor_, 2017/03/22 19:34:24]

Done.

+// 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 ParseInternal(const base::DictionaryValue& dict);
+  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_