Refactor: Make progress a base render method

Should be no functional changes.

source/blender/freestyle/intern/system/RenderMonitor.h

@@ -38,7 +38,7 @@ class RenderMonitor {
   inline void progress(float i)
   {
     if (_re) {
-      _re->progress_cb(_re->prh, i);
+      _re->progress(i);
     }
   }
 

source/blender/render/intern/engine.cc

@@ -502,7 +502,7 @@ void RE_engine_update_progress(RenderEngine *engine, float progress)
 
   if (re) {
     CLAMP(progress, 0.0f, 1.0f);
-    re->progress_cb(re->prh, progress);
+    re->progress(progress);
   }
 }
 

source/blender/render/intern/pipeline.cc

@@ -1430,10 +1430,10 @@ static void do_render_sequencer(Render *re)
 
   /* set overall progress of sequence rendering */
   if (re->r.efra != re->r.sfra) {
-    re->progress_cb(re->prh, float(cfra - re->r.sfra) / (re->r.efra - re->r.sfra));
+    re->progress(float(cfra - re->r.sfra) / (re->r.efra - re->r.sfra));
   }
   else {
-    re->progress_cb(re->prh, 1.0f);
+    re->progress(1.0f);
   }
 }
 

source/blender/render/intern/render_types.cc

@@ -41,6 +41,13 @@ Render::~Render()
   render_result_free(pushedresult);
 }
 
+void Render::progress(float progress)
+{
+  if (progress_cb) {
+    progress_cb(prh, progress);
+  }
+}
+
 void Render::draw_lock()
 {
   if (draw_lock_cb) {

source/blender/render/intern/render_types.h

@@ -49,6 +49,8 @@ struct BaseRender {
                                   const char *view_name) = 0;
   virtual void compositor_free() = 0;
 
+  virtual void progress(float progress) = 0;
+
   virtual void draw_lock() = 0;
   virtual void draw_unlock() = 0;
 
@@ -94,6 +96,8 @@ struct ViewRender : public BaseRender {
   }
   void compositor_free() override {}
 
+  void progress(const float /*progress*/) override {}
+
   void draw_lock() override {}
   void draw_unlock() override {}
 
@@ -128,6 +132,8 @@ struct Render : public BaseRender {
                           const char *view_name) override;
   void compositor_free() override;
 
+  void progress(float progress) override;
+
   void draw_lock() override;
   void draw_unlock() override;