Fixes for mipmap streaming system.

Added KRNode::alwaysStreamResources()
KRCamera now set to always stream its resources, so that the debug font texture and textures used for post-processing will always be loaded.

kraken/nodes/KRCamera.cpp

@@ -479,6 +479,22 @@ void KRCamera::renderPost(RenderInfo& ri)
 void KRCamera::renderDebug(RenderInfo& ri)
 {
   const char* szText = settings.m_debug_text.c_str();
+  if (*szText == '\0') {
+    if (m_debug_text_vertices.getSize() > 0) {
+      m_debug_text_vertices = Block();
+    }
+    return;
+  }
+
+  if (!m_fontTexture.isBound())
+  {
+    return;
+  }
+
+  KRTexture* fontTexture = m_fontTexture.get();
+  if (fontTexture->getStreamLevel() == kraken_stream_level::STREAM_LEVEL_OUT) {
+    return;
+  }
 
   std::string debug_text;
   if (settings.debug_display != KRRenderSettings::KRENGINE_DEBUG_DISPLAY_NONE) {
@@ -488,7 +504,6 @@ void KRCamera::renderDebug(RenderInfo& ri)
     }
   }
 
-  if (*szText) {
   int row_count = 1;
   const int MAX_TABS = 5;
   const int TAB_EXTRA = 2;
@@ -604,9 +619,6 @@ void KRCamera::renderDebug(RenderInfo& ri)
     
   m_debug_text_vbo_data.load(ri.commandBuffer);
 
-    KRTexture* fontTexture = m_fontTexture.get();
-    if (fontTexture->getStreamLevel() != kraken_stream_level::STREAM_LEVEL_OUT) {
-      
   PipelineInfo info{};
   std::string shader_name("debug_font");
   info.shader_name = &shader_name;
@@ -624,15 +636,8 @@ void KRCamera::renderDebug(RenderInfo& ri)
   m_debug_text_vbo_data.bind(ri.commandBuffer);
       
   vkCmdDraw(ri.commandBuffer, vertex_count, 1, 0, 0);
-    }
 
   m_debug_text_vertices.unlock();
-
-  } else {
-    if (m_debug_text_vertices.getSize() > 0) {
-      m_debug_text_vertices = Block();
-    }
-  }
 }
 
 
@@ -853,3 +858,8 @@ bool KRCamera::getShaderValue(ShaderValue value, hydra::Vector4* output) const
 
   return KRNode::getShaderValue(value, output);
 }
+
+bool KRCamera::alwaysStreamResources()
+{
+  return true;
+}

kraken/nodes/KRCamera.h

@@ -63,6 +63,7 @@ public:
 
   void getResourceBindings(std::list<KRResourceBinding*>& bindings) final;
   void render(KRNode::RenderInfo& ri) final;
+  bool alwaysStreamResources() override;
 
   KRRenderSettings settings;
 

kraken/nodes/KRNode.cpp

@@ -671,6 +671,11 @@ void KRNode::getResourceBindings(std::list<KRResourceBinding*>& bindings)
 
 }
 
+bool KRNode::alwaysStreamResources()
+{
+  return false;
+}
+
 void KRNode::render(RenderInfo& ri)
 {
   m_lastRenderFrame = getContext().getCurrentFrame();

kraken/nodes/KRNode.h

@@ -240,6 +240,7 @@ public:
 
   virtual void preStream(const KRViewport& viewport, std::list<KRResourceRequest>& resourceRequests);
   virtual void getResourceBindings(std::list<KRResourceBinding*>& bindings);
+  virtual bool alwaysStreamResources();
   virtual void render(RenderInfo& ri);
 
   virtual void physicsUpdate(float deltaTime);

kraken/resources/scene/KRScene.cpp

@@ -145,6 +145,12 @@ void KRScene::render(KRNode::RenderInfo& ri)
     }
   }
 
+  // Stream assets for nodes that request having their assets always streamed in.
+  for (std::set<KRNode*>::iterator itr = m_alwaysStreamedNodes.begin(); itr != m_alwaysStreamedNodes.end(); itr++) {
+    KRNode* node = (*itr);
+    node->preStream(*ri.viewport, resourceRequests);
+  }
+
   std::vector<KROctreeNode*> remainingOctrees;
   if (m_nodeTree.getRootNode() != NULL) {
     remainingOctrees.push_back(m_nodeTree.getRootNode());
@@ -204,16 +210,17 @@ void KRScene::render(KRNode::RenderInfo& ri, std::list<KRResourceRequest>& resou
 
       // Render objects that are at this octree level
       for (std::set<KRNode*>::iterator itr = pOctreeNode->getSceneNodes().begin(); itr != pOctreeNode->getSceneNodes().end(); itr++) {
+        KRNode* node = (*itr);
         //assert(pOctreeNode->getBounds().contains((*itr)->getBounds()));  // Sanity check
         if (ri.renderPass->getType() == RenderPassType::RENDER_PASS_PRESTREAM) {
-          if ((*itr)->getLODVisibility() >= KRNode::LOD_VISIBILITY_PRESTREAM) {
-            (*itr)->preStream(*ri.viewport, resourceRequests);
+          if (node->getLODVisibility() >= KRNode::LOD_VISIBILITY_PRESTREAM) {
+            node->preStream(*ri.viewport, resourceRequests);
           }
         } else {
-          if ((*itr)->getLODVisibility() > KRNode::LOD_VISIBILITY_PRESTREAM)
+          if (node->getLODVisibility() > KRNode::LOD_VISIBILITY_PRESTREAM)
           {
             ri.reflectedObjects.push_back(*itr);
-            (*itr)->render(ri);
+            node->render(ri);
             ri.reflectedObjects.pop_back();
           }
         }
@@ -313,6 +320,9 @@ void KRScene::notify_sceneGraphDelete(KRNode* pNode)
 {
   m_nodeTree.remove(pNode);
   m_physicsNodes.erase(pNode);
+  if (pNode->alwaysStreamResources()) {
+    m_alwaysStreamedNodes.erase(pNode);
+  }
   KRAmbientZone* AmbientZoneNode = dynamic_cast<KRAmbientZone*>(pNode);
   if (AmbientZoneNode) {
     m_ambientZoneNodes.erase(AmbientZoneNode);
@@ -351,6 +361,9 @@ void KRScene::updateOctree(const KRViewport& viewport)
     if (node->hasPhysics()) {
       m_physicsNodes.insert(node);
     }
+    if (node->alwaysStreamResources()) {
+      m_alwaysStreamedNodes.insert(node);
+    }
     KRAmbientZone* ambientZoneNode = dynamic_cast<KRAmbientZone*>(node);
     if (ambientZoneNode) {
       m_ambientZoneNodes.insert(ambientZoneNode);
@@ -378,6 +391,12 @@ void KRScene::updateOctree(const KRViewport& viewport)
     } else if (!node->hasPhysics()) {
       m_physicsNodes.erase(node);
     }
+
+    if (node->alwaysStreamResources()) {
+      m_alwaysStreamedNodes.insert(node);
+    } else {
+      m_alwaysStreamedNodes.erase(node);
+    }
   }
 }
 

kraken/resources/scene/KRScene.h

@@ -108,6 +108,7 @@ private:
   std::set<KRReverbZone*> m_reverbZoneNodes;
   std::set<KRLocator*> m_locatorNodes;
   std::set<KRLight*> m_lights;
+  std::set<KRNode*> m_alwaysStreamedNodes;
 
   KROctree m_nodeTree;
 

kraken/resources/texture/KRTexture.cpp

@@ -122,7 +122,7 @@ void KRTexture::resize(int lod)
 
   if (!m_haveNewHandles) {
     if (lod != -1) {
-      int target_lod = KRMIN(lod, m_lod_count);
+      int target_lod = KRMIN(lod, m_lod_count - 1);
 
       if (m_new_lod != target_lod || m_handles.empty()) {
         assert(m_newTextureMemUsed == 0);
@@ -340,8 +340,7 @@ long KRTexture::getMemRequiredForLodRange(int min_lod, int max_lod /* = 0xff */)
 
   long memRequired = 0;
   for (int lod = target_min_lod; lod <= target_max_lod; lod++) {
-    memRequired += 
-        (lod);
+    memRequired += getMemRequiredForLod(lod);
   }
   return memRequired;
 }

kraken/resources/texture/KRTexture2D.cpp

@@ -46,23 +46,22 @@ KRTexture2D::~KRTexture2D()
   delete m_pData;
 }
 
-bool KRTexture2D::createGPUTexture(int lod)
+bool KRTexture2D::createGPUTexture(int targetLod)
 {
   if (m_haveNewHandles) {
     return true;
   }
 
   Vector3i dimensions = getDimensions();
-  size_t bufferSize = getMemRequiredForLodRange(lod);
+  size_t bufferSize = getMemRequiredForLodRange(targetLod);
   void* buffer = malloc(bufferSize);
 
-  if (!getLodData(buffer, lod)) {
+  if (!getLodData(buffer, targetLod)) {
     delete buffer;
     return false;
   }
 
   bool success = true;
-  int target_lod = m_new_lod;
   m_new_lod = -1;
 
   KRDeviceManager* deviceManager = getContext().getDeviceManager();
@@ -76,7 +75,7 @@ bool KRTexture2D::createGPUTexture(int lod)
     texture.allocation = VK_NULL_HANDLE;
     texture.image = VK_NULL_HANDLE;
 
-    if (!allocate(device, target_lod, 0, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &texture.image, &texture.allocation
+    if (!allocate(device, targetLod, 0, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &texture.image, &texture.allocation
 #if KRENGINE_DEBUG_GPU_LABELS
       , getName().c_str()
 #endif
@@ -85,7 +84,7 @@ bool KRTexture2D::createGPUTexture(int lod)
       break;
     }
 
-    int min_mip = KRMIN(target_lod, m_lod_count - 1);
+    int min_mip = KRMIN(targetLod, m_lod_count - 1);
     int mip_count = m_lod_count - min_mip;
 
     VkImageViewCreateInfo viewInfo{};
@@ -135,7 +134,7 @@ bool KRTexture2D::createGPUTexture(int lod)
   delete buffer;
 
   if (success) {
-    m_new_lod = target_lod;
+    m_new_lod = targetLod;
     m_haveNewHandles = true;
   } else {
     destroyNewHandles();

kraken/resources/texture/KRTexture2D.h

@@ -53,5 +53,5 @@ public:
 protected:
   mimir::Block* m_pData;
 
-  bool createGPUTexture(int lod) override;
+  bool createGPUTexture(int targetLod) override;
 };

kraken/resources/texture/KRTextureManager.cpp

@@ -302,7 +302,7 @@ void KRTextureManager::balanceTextureMemory(long& memoryRemaining, long& memoryR
 
   for (auto itr = m_activeTextures_streamer.begin(); itr != m_activeTextures_streamer.end(); itr++) {
     KRTexture* texture = (*itr).second;
-    int min_lod_level = KRMIN(getContext().KRENGINE_TEXTURE_LQ_LOD, texture->getLodCount());
+    int min_lod_level = KRMIN(getContext().KRENGINE_TEXTURE_LQ_LOD, texture->getLodCount() - 1);
     long minLodMem = texture->getMemRequiredForLodRange(min_lod_level);
     memoryRemaining -= minLodMem;