New function to check if running opengl render

source/blender/draw/intern/DRW_render.h

@@ -466,6 +466,7 @@ bool DRW_state_is_select(void);
 bool DRW_state_is_depth(void);
 bool DRW_state_is_image_render(void);
 bool DRW_state_is_scene_render(void);
+bool DRW_state_is_opengl_render(void);
 bool DRW_state_show_text(void);
 bool DRW_state_draw_support(void);
 bool DRW_state_draw_background(void);

source/blender/draw/intern/draw_manager.c

@@ -3958,6 +3958,14 @@ bool DRW_state_is_scene_render(void)
 	return DST.options.is_scene_render;
 }
 
+/**
+* Whether we are rendering simple opengl render
+*/
+bool DRW_state_is_opengl_render(void)
+{
+	return DST.options.is_image_render && !DST.options.is_scene_render;
+}
+
 /**
  * Gives you the iterator mode to use for depsgraph.
  */