Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/render/hydra/engine.hh

@@ -0,0 +1,79 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include <pxr/imaging/hd/driver.h>
+#include <pxr/imaging/hd/engine.h>
+#include <pxr/imaging/hd/pluginRenderDelegateUniqueHandle.h>
+#include <pxr/imaging/hd/retainedSceneIndex.h>
+#include <pxr/imaging/hgi/hgi.h>
+#include <pxr/usd/usd/stage.h>
+#include <pxr/usdImaging/usdImaging/delegate.h>
+
+#include "hydra/camera_delegate.hh"
+#include "hydra/scene_index.hh"
+#include "hydra/settings.hh"
+#include "hydra/usd_scene_index.hh"
+
+#include "light_tasks_delegate.hh"
+#include "render_task_delegate.hh"
+
+struct CLG_LogRef;
+
+namespace blender {
+
+struct bContext;
+struct RenderEngine;
+
+namespace render::hydra {
+
+extern CLG_LogRef *LOG_HYDRA_RENDER;
+
+class Engine {
+ protected:
+  std::string render_delegate_name_;
+  RenderEngine *bl_engine_ = nullptr;
+  Depsgraph *depsgraph_ = nullptr;
+  bContext *context_ = nullptr;
+  Scene *scene_ = nullptr;
+
+  /* The order is important due to deletion order */
+  pxr::HgiUniquePtr hgi_;
+  pxr::HdDriver hgi_driver_;
+  pxr::HdPluginRenderDelegateUniqueHandle render_delegate_;
+  std::unique_ptr<pxr::HdRenderIndex> render_index_;
+
+  std::unique_ptr<io::hydra::CameraDelegate> free_camera_delegate_;
+  std::unique_ptr<io::hydra::HydraSceneIndex> hydra_scene_index_;
+  pxr::SdfPath hydra_scene_index_path_;
+  std::unique_ptr<io::hydra::USDSceneIndex> usd_scene_delegate_;
+
+  pxr::HdRetainedSceneIndexRefPtr task_scene_index_;
+  std::unique_ptr<RenderTaskDelegate> render_task_delegate_;
+  std::unique_ptr<LightTasksDelegate> light_tasks_delegate_;
+  std::unique_ptr<pxr::HdEngine> engine_;
+
+ public:
+  Engine(RenderEngine *bl_engine, const std::string &render_delegate_name);
+  virtual ~Engine() = default;
+
+  void sync(Depsgraph *depsgraph, bContext *context);
+  virtual void render() = 0;
+
+  virtual void set_render_setting(const std::string &key, const pxr::VtValue &val);
+
+ protected:
+  float renderer_percent_done();
+  pxr::HdTaskSharedPtrVector tasks();
+  virtual void notify_status(float progress,
+                             const std::string &title,
+                             const std::string &info) = 0;
+};
+
+}  // namespace render::hydra
+}  // namespace blender