Rendering Daydream controller in a fixed position.

chrome/browser/android/vr_shell/vr_controller_model.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_VR_CONTROLLER_MODEL_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_VR_CONTROLLER_MODEL_H_
+
+#include <memory>
+
+#include "chrome/browser/android/vr_shell/gltf_asset.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gl/gl_bindings.h"
+
+namespace vr_shell {
+
+class VrControllerModel {
+ public:
+  enum State {
+    IDLE = 0,
+    TOUCHPAD,
+    APP,
+    SYSTEM,
+    // New ControllerStates should be added here, before STATE_COUNT.
+    STATE_COUNT,
+  };
+
+  // TODO(acondor): Hardcoded paths before VrShell resources are
+  // delivered through component updater.
+  static constexpr char const kComponentName[] = "VrShell";
+  static constexpr char const kDefaultVersion[] = "0";
+
+  static constexpr char const kModelsDirectory[] = "models";
+  static constexpr char const kModelFilename[] = "controller.gltf";
+  static constexpr char const kTexturesDirectory[] = "tex";
+  static constexpr char const* kTextureFilenames[] = {
+      "ddcontroller_idle.png", "ddcontroller_touchpad.png",
+      "ddcontroller_app.png", "ddcontroller_system.png",
+  };
+
+  explicit VrControllerModel(std::unique_ptr<gltf::Asset> gltf_asset);
+  ~VrControllerModel();
+
+  const GLvoid* ElementsBuffer() const;
+  GLsizeiptr ElementsBufferSize() const;
+  const GLvoid* IndicesBuffer() const;
+  GLenum DrawMode() const;
+  GLsizeiptr IndicesBufferSize() const;
+  const gltf::Accessor* IndicesAccessor() const;
+  const gltf::Accessor* PositionAccessor() const;
+  const gltf::Accessor* TextureCoordinateAccessor() const;
+  void SetTexture(int state, std::unique_ptr<SkBitmap> bitmap);
+  const SkBitmap* GetTexture(int state) const;
+
+  // Free resources but maintain metadata.
+  void Free();
+
+ private:
+  std::unique_ptr<gltf::Asset> gltf_asset_;
+  std::vector<std::unique_ptr<SkBitmap>> texture_bitmaps_;
+
+  const char* Buffer() const;
+  const gltf::Accessor* Accessor(const std::string& key) const;
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_CONTROLLER_MODEL_H_