Implementing glTF 1.0 parser

chrome/browser/android/vr_shell/gltf_asset.cc

+// 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.
+
+#include "chrome/browser/android/vr_shell/gltf_asset.h"
+
+#include <unordered_map>
+
+#include "base/logging.h"
+
+namespace vr_shell {
+
+namespace gltf {
+
+const std::unordered_map<std::string, Type> kTypeMap = {
+    {"SCALAR", SCALAR}, {"VEC2", VEC2}, {"VEC3", VEC3}, {"VEC4", VEC4},
+    {"MAT2", MAT2},     {"MAT3", MAT3}, {"MAT4", MAT4},
+};
+
+Type GetType(const std::string& type) {
+  auto it = kTypeMap.find(type);
+  if (it == kTypeMap.end())
+    return UNKNOWN;
+  return it->second;
+}
+
+Mesh::Primitive::Primitive() : indices(nullptr), mode(4) {}
+
+Mesh::Primitive::~Primitive() = default;
+
+Mesh::Mesh() {}
+
+Mesh::~Mesh() = default;
+
+Node::Node() {}
+
+Node::~Node() = default;
+
+Scene::Scene() {}
+
+Scene::~Scene() = default;
+
+Asset::Asset() : scene_(nullptr) {}
+
+Asset::~Asset() = default;
+
+std::size_t Asset::AddBuffer(std::unique_ptr<Buffer> buffer) {
+  auto index = buffers_.size();
+  buffers_.push_back(std::move(buffer));
+  return index;
+}
+
+std::size_t Asset::AddBufferView(std::unique_ptr<BufferView> buffer_view) {
+  auto index = buffer_views_.size();
+  buffer_views_.push_back(std::move(buffer_view));
+  return index;
+}
+
+std::size_t Asset::AddAccessor(std::unique_ptr<Accessor> accessor) {
+  auto index = accessors_.size();
+  accessors_.push_back(std::move(accessor));
+  return index;
+}
+
+std::size_t Asset::AddMesh(std::unique_ptr<Mesh> mesh) {
+  auto index = meshes_.size();
+  meshes_.push_back(std::move(mesh));
+  return index;
+}
+
+std::size_t Asset::AddNode(std::unique_ptr<Node> node) {
+  auto index = nodes_.size();
+  nodes_.push_back(std::move(node));
+  return index;
+}
+
+std::size_t Asset::AddScene(std::unique_ptr<Scene> scene) {
+  auto index = scenes_.size();
+  scenes_.push_back(std::move(scene));
+  return index;
+}
+
+const Buffer* Asset::GetBuffer(std::size_t id) const {
+  return id < buffers_.size() ? buffers_[id].get() : nullptr;
+}
+
+const BufferView* Asset::GetBufferView(std::size_t id) const {
+  return id < buffer_views_.size() ? buffer_views_[id].get() : nullptr;
+}
+
+const Accessor* Asset::GetAccessor(std::size_t id) const {
+  return id < accessors_.size() ? accessors_[id].get() : nullptr;
+}
+
+const Mesh* Asset::GetMesh(std::size_t id) const {
+  return id < meshes_.size() ? meshes_[id].get() : nullptr;
+}
+
+const Node* Asset::GetNode(std::size_t id) const {
+  return id < nodes_.size() ? nodes_[id].get() : nullptr;
+}
+
+const Scene* Asset::GetScene(std::size_t id) const {
+  return id < scenes_.size() ? scenes_[id].get() : nullptr;
+}
+
+}  // namespace gltf
+
+}  // namespace vr_shell