viewer: update renderer parameters if the viewer node's parameters have changed

app/node/output/viewer/viewer.cpp

@@ -81,17 +81,17 @@ QString ViewerOutput::Description() const
   return tr("Interface between a Viewer panel and the node system.");
 }
 
-NodeInput *ViewerOutput::texture_input()
+NodeInput *ViewerOutput::texture_input() const
 {
   return texture_input_;
 }
 
-NodeInput *ViewerOutput::samples_input()
+NodeInput *ViewerOutput::samples_input() const
 {
   return samples_input_;
 }
 
-NodeInput *ViewerOutput::length_input()
+NodeInput *ViewerOutput::length_input() const
 {
   return length_input_;
 }
@@ -136,6 +136,7 @@ void ViewerOutput::set_video_params(const VideoParams &video)
 
   emit SizeChanged(video_params_.width(), video_params_.height());
   emit TimebaseChanged(video_params_.time_base());
+  emit VideoParamsChanged();
 }
 
 void ViewerOutput::set_audio_params(const AudioParams &audio)

app/node/output/viewer/viewer.h

@@ -50,9 +50,9 @@ public:
   virtual QString Category() const override;
   virtual QString Description() const override;
 
-  NodeInput* texture_input();
-  NodeInput* samples_input();
-  NodeInput* length_input();
+  NodeInput* texture_input() const;
+  NodeInput* samples_input() const;
+  NodeInput* length_input() const;
 
   virtual void InvalidateCache(const rational &start_range, const rational &end_range, NodeInput *from = nullptr) override;
   virtual void InvalidateVisible(NodeInput *from) override;
@@ -98,6 +98,8 @@ signals:
 
   void SizeChanged(int width, int height);
 
+  void VideoParamsChanged();
+
   void BlockAdded(Block* block, TrackReference track);
   void BlockRemoved(Block* block);
 

app/widget/viewer/viewer.cpp

@@ -119,6 +119,7 @@ void ViewerWidget::ConnectNodeInternal(ViewerOutput *n)
   connect(n, &ViewerOutput::TimebaseChanged, this, &ViewerWidget::SetTimebase);
   connect(n, &ViewerOutput::SizeChanged, this, &ViewerWidget::SizeChangedSlot);
   connect(n, &ViewerOutput::LengthChanged, this, &ViewerWidget::LengthChangedSlot);
+  connect(n, &ViewerOutput::VideoParamsChanged, this, &ViewerWidget::UpdateRendererParameters);
   connect(n, &ViewerOutput::VisibleInvalidated, this, &ViewerWidget::InvalidateVisible);
 
   SizeChangedSlot(n->video_params().width(), n->video_params().height());
@@ -144,6 +145,7 @@ void ViewerWidget::DisconnectNodeInternal(ViewerOutput *n)
   disconnect(n, &ViewerOutput::TimebaseChanged, this, &ViewerWidget::SetTimebase);
   disconnect(n, &ViewerOutput::SizeChanged, this, &ViewerWidget::SizeChangedSlot);
   disconnect(n, &ViewerOutput::LengthChanged, this, &ViewerWidget::LengthChangedSlot);
+  disconnect(n, &ViewerOutput::VideoParamsChanged, this, &ViewerWidget::UpdateRendererParameters);
   disconnect(n, &ViewerOutput::VisibleInvalidated, this, &ViewerWidget::InvalidateVisible);
 
   // Effectively disables the viewer and clears the state