nodes: fixed hashing issues

app/render/previewautocacher.cpp

@@ -69,7 +69,7 @@ void PreviewAutoCacher::GenerateHashes(ViewerOutput *viewer, FrameHashCache* cac
 
   foreach (const rational& time, times) {
     // See if hash already exists in disk cache
-    QByteArray hash = RenderManager::Hash(viewer->GetConnectedNode(ViewerOutput::kTextureInput), viewer->GetVideoParams(), time);
+    QByteArray hash = RenderManager::Hash(viewer->GetConnectedTextureOutput(), viewer->GetVideoParams(), time);
 
     // Check memory list since disk checking is slow
     bool hash_exists = (std::find(existing_hashes.begin(), existing_hashes.end(), hash) != existing_hashes.end());

app/render/rendermanager.cpp

@@ -79,7 +79,7 @@ RenderManager::~RenderManager()
   }
 }
 
-QByteArray RenderManager::Hash(const Node *n, const VideoParams &params, const rational &time)
+QByteArray RenderManager::Hash(const Node *n, const QString& output, const VideoParams &params, const rational &time)
 {
   QCryptographicHash hasher(QCryptographicHash::Sha1);
 
@@ -93,7 +93,7 @@ QByteArray RenderManager::Hash(const Node *n, const VideoParams &params, const r
   hasher.addData(reinterpret_cast<const char*>(&format), sizeof(VideoParams::Format));
 
   if (n) {
-    n->Hash(Node::kDefaultOutput, hasher, time);
+    n->Hash(output, hasher, time);
   }
 
   return hasher.result();

app/render/rendermanager.h

@@ -67,7 +67,11 @@ public:
   /**
    * @brief Generate a unique identifier for a certain node at a certain time
    */
-  static QByteArray Hash(const Node *n, const VideoParams &params, const rational &time);
+  static QByteArray Hash(const Node *n, const QString &output, const VideoParams &params, const rational &time);
+  static QByteArray Hash(const NodeOutput &output, const VideoParams &params, const rational &time)
+  {
+    return Hash(output.node(), output.output(), params, time);
+  }
 
   /**
    * @brief Asynchronously generate a frame at a given time