scripts/modules/bpy_hydra.py

@@ -21,7 +21,13 @@ class CustomHydraRenderEngine(HydraRenderEngine):
 
         bpy_hydra.register_plugins(["/path/to/plugin")])
 
-    def get_delegate_settings(self, engine_type):
+    def get_sync_settings(self, engine_type):
+        return {
+            'setting1': True,
+            'setting2': "2",
+        }
+
+    def get_render_settings(self, engine_type):
         return {
             'setting1': 1,
             'setting2': "2",
@@ -73,27 +79,43 @@ class HydraRenderEngine(bpy.types.RenderEngine):
     def unregister(cls):
         pass
 
-    def get_delegate_settings(self, engine_type):
+    def get_sync_settings(self, engine_type):
+        return {}
+
+    def get_render_settings(self, engine_type):
         return {}
 
     # final render
     def update(self, data, depsgraph):
         engine_type = 'PREVIEW' if self.is_preview else 'FINAL'
         self.engine_ptr = _bpy_hydra.engine_create(self.as_pointer(), engine_type, self.delegate_id)
-        delegate_settings = self.get_delegate_settings(engine_type)
-        _bpy_hydra.engine_sync(self.engine_ptr, depsgraph.as_pointer(), bpy.context.as_pointer(), delegate_settings)
+
+        for key, val in self.get_sync_settings(engine_type).items():
+            _bpy_hydra.engine_set_sync_setting(self.engine_ptr, key, val)
+
+        _bpy_hydra.engine_sync(self.engine_ptr, depsgraph.as_pointer(), bpy.context.as_pointer())
 
     def render(self, depsgraph):
-        if self.engine_ptr:
-            _bpy_hydra.engine_render(self.engine_ptr, depsgraph.as_pointer())
+        if not self.engine_ptr:
+            return
+
+        for key, val in self.get_render_settings('PREVIEW' if self.is_preview else 'FINAL').items():
+            _bpy_hydra.engine_set_render_setting(self.engine_ptr, key, val)
+
+        _bpy_hydra.engine_render(self.engine_ptr, depsgraph.as_pointer())
 
     # viewport render
     def view_update(self, context, depsgraph):
         if not self.engine_ptr:
             self.engine_ptr = _bpy_hydra.engine_create(self.as_pointer(), 'VIEWPORT', self.delegate_id)
 
-        delegate_settings = self.get_delegate_settings('VIEWPORT')
-        _bpy_hydra.engine_sync(self.engine_ptr, depsgraph.as_pointer(), context.as_pointer(), delegate_settings)
+        for key, val in self.get_sync_settings('VIEWPORT').items():
+            _bpy_hydra.engine_set_sync_setting(self.engine_ptr, key, val)
+
+        _bpy_hydra.engine_sync(self.engine_ptr, depsgraph.as_pointer(), context.as_pointer())
+
+        for key, val in self.get_render_settings('VIEWPORT').items():
+            _bpy_hydra.engine_set_render_setting(self.engine_ptr, key, val)
 
     def view_draw(self, context, depsgraph):
         if not self.engine_ptr:

source/blender/render/hydra/python.cc

@@ -232,7 +232,7 @@ static PyObject *engine_set_sync_setting_func(PyObject * /*self*/, PyObject *arg
   Engine *engine = (Engine *)PyLong_AsVoidPtr(pyengine);
   engine->set_sync_setting(pxr::TfToken(key), get_setting_val(pyval));
 
-  CLOG_INFO(LOG_RENDER_HYDRA, 2, "Engine %016llx", engine);
+  CLOG_INFO(LOG_RENDER_HYDRA, 2, "Engine %016llx: %s", engine, key);
   Py_RETURN_NONE;
 }
 
@@ -247,7 +247,7 @@ static PyObject *engine_set_render_setting_func(PyObject * /*self*/, PyObject *a
   Engine *engine = (Engine *)PyLong_AsVoidPtr(pyengine);
   engine->set_render_setting(pxr::TfToken(key), get_setting_val(pyval));
 
-  CLOG_INFO(LOG_RENDER_HYDRA, 2, "Engine %016llx", engine);
+  CLOG_INFO(LOG_RENDER_HYDRA, 2, "Engine %016llx: %s", engine, key);
   Py_RETURN_NONE;
 }
 
@@ -261,8 +261,8 @@ static PyMethodDef methods[] = {
     {"engine_sync", engine_sync_func, METH_VARARGS, ""},
     {"engine_render", engine_render_func, METH_VARARGS, ""},
     {"engine_view_draw", engine_view_draw_func, METH_VARARGS, ""},
-    {"engine_sync_setting", engine_set_sync_setting_func, METH_VARARGS, ""},
-    {"engine_render_setting", engine_set_render_setting_func, METH_VARARGS, ""},
+    {"engine_set_sync_setting", engine_set_sync_setting_func, METH_VARARGS, ""},
+    {"engine_set_render_setting", engine_set_render_setting_func, METH_VARARGS, ""},
 
     {NULL, NULL, 0, NULL},
 };