Refactord how CompileResults::maxSlots is managed to ensure changes from the DatabasePager gets passed on to updateViewer(..)

include/vsg/app/CompileManager.h

@@ -20,6 +20,7 @@ namespace vsg
 
     // forward declare
     class RecordAndSubmitTask;
+    class Viewer;
 
     /// CompileResult struct encapsulates the results of compile traversal.
     /// Used to help guide further operations done with the compiled subgraph.
@@ -36,7 +37,7 @@ namespace vsg
 
         void reset();
         void add(const CompileResult& cr);
-        bool requiresViewerUpdate() const;
+        bool requiresViewerUpdate(const Viewer* viewer = nullptr) const;
     };
 
     /// ResourceScavenger provides a mechanism for releasing and reusing unused resources when allocation of required GPU memory fails.

include/vsg/vk/Slots.h

@@ -29,11 +29,18 @@ namespace vsg
             return view > state ? view : state;
         }
 
-        void merge(const Slots& rhs)
+        /// update this Slots object to hold the maximum state and view value of this and rhs Slots objects.
+        void update(const Slots& rhs)
         {
             if (rhs.state > state) state = rhs.state;
             if (rhs.view > view) view = rhs.view;
         }
+
+        /// return true if this Slots object is less that rhs Slots object and needs to be updated by calling this Slots::merge(rhs).
+        bool requiresUpdate(const Slots& rhs) const
+        {
+            return rhs.state > state || rhs.view > view;
+        }
     };
 
 } // namespace vsg

src/vsg/app/CompileManager.cpp

@@ -41,7 +41,7 @@ void CompileResult::add(const CompileResult& cr)
         result = cr.result;
     }
 
-    maxSlots.merge(cr.maxSlots);
+    maxSlots.update(cr.maxSlots);
 
     if (!containsPagedLOD) containsPagedLOD = cr.containsPagedLOD;
 
@@ -57,7 +57,7 @@ void CompileResult::add(const CompileResult& cr)
     dynamicData.add(cr.dynamicData);
 }
 
-bool CompileResult::requiresViewerUpdate() const
+bool CompileResult::requiresViewerUpdate(const Viewer* viewer) const
 {
     if (result == VK_INCOMPLETE) return false;
 
@@ -67,6 +67,18 @@ bool CompileResult::requiresViewerUpdate() const
     {
         if (!binDetails.indices.empty() || !binDetails.bins.empty()) return true;
     }
+
+    if (viewer)
+    {
+        for (const auto& task : viewer->recordAndSubmitTasks)
+        {
+            for (const auto& commandGraph : task->commandGraphs)
+            {
+                if (commandGraph->maxSlots.requiresUpdate(maxSlots)) return true;
+            }
+        }
+    }
+
     return false;
 }
 

src/vsg/app/CompileTraversal.cpp

@@ -325,7 +325,7 @@ void CompileTraversal::apply(CommandGraph& commandGraph)
 
     for (const auto& context : contexts)
     {
-        commandGraph.maxSlots.merge(context->resourceRequirements.maxSlots);
+        commandGraph.maxSlots.update(context->resourceRequirements.maxSlots);
     }
 
     commandGraph.traverse(*this);
@@ -339,7 +339,7 @@ void CompileTraversal::apply(SecondaryCommandGraph& secondaryCommandGraph)
 
     for (auto& context : contexts)
     {
-        secondaryCommandGraph.maxSlots.merge(context->resourceRequirements.maxSlots);
+        secondaryCommandGraph.maxSlots.update(context->resourceRequirements.maxSlots);
 
         // save previous states to be restored after traversal
         auto previousRenderPass = context->renderPass;

src/vsg/app/RecordAndSubmitTask.cpp

@@ -306,7 +306,7 @@ void vsg::updateTasks(RecordAndSubmitTasks& tasks, ref_ptr<CompileManager> compi
     {
         for (const auto& commandGraph : task->commandGraphs)
         {
-            commandGraph->maxSlots.merge(compileResult.maxSlots);
+            commandGraph->maxSlots.update(compileResult.maxSlots);
         }
     }
 

src/vsg/app/Viewer.cpp

@@ -794,17 +794,22 @@ void Viewer::update()
 {
     CPU_INSTRUMENTATION_L1_NC(instrumentation, "Viewer update", COLOR_UPDATE);
 
+    CompileResult cr;
+
     // merge any updates from the DatabasePager
     for (const auto& task : recordAndSubmitTasks)
     {
         if (task->databasePager)
         {
-            CompileResult cr;
             task->databasePager->updateSceneGraph(_frameStamp, cr);
-            if (cr.requiresViewerUpdate()) updateViewer(*this, cr);
         }
     }
 
+    if (cr.requiresViewerUpdate(this))
+    {
+        updateViewer(*this, cr);
+    }
+
     // run update operations
     updateOperations->run();
 

src/vsg/state/ViewDependentState.cpp

@@ -421,7 +421,7 @@ void ViewDependentState::update(ResourceRequirements& requirements)
 {
     if (preRenderCommandGraph)
     {
-        preRenderCommandGraph->maxSlots.merge(requirements.maxSlots);
+        preRenderCommandGraph->maxSlots.update(requirements.maxSlots);
     }
 }
 

src/vsg/vk/Context.cpp

@@ -201,7 +201,7 @@ VkResult Context::reserve(ResourceRequirements& requirements)
 
     if (deviceMemoryBufferPools->compileTraversalUseReserve) result = deviceMemoryBufferPools->reserve(requirements);
 
-    resourceRequirements.maxSlots.merge(requirements.maxSlots);
+    resourceRequirements.maxSlots.update(requirements.maxSlots);
 
     descriptorPools->reserve(requirements);
 

src/vsg/vk/ResourceRequirements.cpp

@@ -66,7 +66,7 @@ DescriptorPoolSizes ResourceRequirements::computeDescriptorPoolSizes() const
 
 void ResourceRequirements::apply(const ResourceHints& resourceHints)
 {
-    maxSlots.merge(resourceHints.maxSlots);
+    maxSlots.update(resourceHints.maxSlots);
 
     if (!resourceHints.descriptorPoolSizes.empty() || resourceHints.numDescriptorSets > 0)
     {