diskmanager: clearing disk cache at runtime will correctly signal renderers

Clearing the disk cache in the preferences will correctly communicate to
renderers that those frames are now deleted.

app/render/backend/videorenderbackend.cpp

@@ -303,14 +303,14 @@ void VideoRenderBackend::ThreadCompletedFrame(NodeDependency path, qint64 job_ti
   }
 }
 
-void VideoRenderBackend::ThreadCompletedDownload(NodeDependency dep, qint64 job_time, QByteArray hash)
+void VideoRenderBackend::ThreadCompletedDownload(NodeDependency dep, qint64 job_time, QByteArray hash, bool texture_existed)
 {
   SetWorkerBusyState(static_cast<RenderWorker*>(sender()), false);
 
   SetFrameHash(dep, hash, job_time);
 
   // Register frame with the disk manager
-  if (operating_mode_ & VideoRenderWorker::kDownloadOnly) {
+  if (texture_existed && operating_mode_ & VideoRenderWorker::kDownloadOnly) {
     DiskManager::instance()->CreatedFile(frame_cache()->CachePathName(hash, params_.format()), hash);
   }
 

app/render/backend/videorenderbackend.h

@@ -140,7 +140,7 @@ private:
 
 private slots:
   void ThreadCompletedFrame(NodeDependency path, qint64 job_time, QByteArray hash, QVariant value);
-  void ThreadCompletedDownload(NodeDependency dep, qint64 job_time, QByteArray hash);
+  void ThreadCompletedDownload(NodeDependency dep, qint64 job_time, QByteArray hash, bool texture_existed);
   void ThreadSkippedFrame(NodeDependency dep, qint64 job_time, QByteArray hash);
   void ThreadHashAlreadyExists(NodeDependency dep, qint64 job_time, QByteArray hash);
 

app/render/backend/videorenderworker.cpp

@@ -47,7 +47,7 @@ NodeValueTable VideoRenderWorker::RenderInternal(const NodeDependency& path, con
   if (!(operating_mode_ & kRenderOnly)) {
 
     // Emit only the hash
-    emit CompletedDownload(path, job_time, hash);
+    emit CompletedDownload(path, job_time, hash, false);
 
   } else if ((operating_mode_ & kHashOnly) && frame_cache_->HasHash(hash, video_params_.format())) {
 
@@ -74,7 +74,7 @@ NodeValueTable VideoRenderWorker::RenderInternal(const NodeDependency& path, con
 
     if (operating_mode_ & kDownloadOnly) {
       // Signal that this job is complete
-      emit CompletedDownload(path, job_time, hash);
+      emit CompletedDownload(path, job_time, hash, !texture.isNull());
     }
 
   } else {

app/render/backend/videorenderworker.h

@@ -50,7 +50,7 @@ public:
 signals:
   void CompletedFrame(NodeDependency path, qint64 job_time, QByteArray hash, QVariant value);
 
-  void CompletedDownload(NodeDependency path, qint64 job_time, QByteArray hash);
+  void CompletedDownload(NodeDependency path, qint64 job_time, QByteArray hash, bool texture_existed);
 
   void HashAlreadyBeingCached(NodeDependency path, qint64 job_time, QByteArray hash);