SHADE_Engine/src/Editor/EditorWindow/MaterialInspector/SHMaterialInspector.cpp

@@ -174,7 +174,6 @@ namespace SHADE
     bool shaderChanged = false;
     const auto* SHADER_INFO = SHAssetManager::GetData<SHShaderAsset>(currentMatSpec->fragShader);
     const std::string SHADER_NAME = SHADER_INFO ? SHADER_INFO->name : "Unknown Shader";
-    ImGui::BeginDisabled();
     isDirty |= SHEditorWidgets::DragDropReadOnlyField<AssetID>
     (
       "Fragment Shader", SHADER_NAME.data(),
@@ -182,7 +181,6 @@ namespace SHADE
       [this](const AssetID& id) { currentMatSpec->fragShader = id; },
       SHDragDrop::DRAG_RESOURCE
     );
-    ImGui::EndDisabled();
 
     // Load the shader to access it's data
     auto fragShader = SHResourceManager::LoadOrGet<SHVkShaderModule>(currentMatSpec->fragShader);

SHADE_Engine/src/Graphics/MiddleEnd/Batching/SHBatch.cpp

@@ -507,9 +507,13 @@ namespace SHADE
       return;
     }
 
+    // Nothing to draw
+    if (subBatches.empty())
+      return;
+
     // Bind all required objects before drawing
     static std::array<uint32_t, 1> dynamicOffset{ 0 };
-    cmdBuffer->BeginLabeledSegment("SHBatch");
+    cmdBuffer->BeginLabeledSegment("SHBatch for Pipeline #" + std::to_string(pipeline.GetId().Data.Index));
     cmdBuffer->BindPipeline(pipeline);
     cmdBuffer->BindVertexBuffer(SHGraphicsConstants::VertexBufferBindings::TRANSFORM, transformDataBuffer[frameIndex], 0);
     cmdBuffer->BindVertexBuffer(SHGraphicsConstants::VertexBufferBindings::INTEGER_DATA, instancedIntegerBuffer[frameIndex], 0);

SHADE_Engine/src/Graphics/MiddleEnd/Batching/SHSuperBatch.cpp

@@ -55,7 +55,8 @@ namespace SHADE
 
   void SHSuperBatch::Remove(const SHRenderable* renderable) noexcept
   {
-    const Handle<SHVkPipeline> PIPELINE = renderable->GetMaterial()->GetBaseMaterial()->GetPipeline();
+    Handle<SHMaterial> baseMat = renderable->GetMaterial()->GetBaseMaterial();
+    const Handle<SHVkPipeline> PIPELINE = baseMat->HasPipelineChanged() ? baseMat->GetPrevPipeline() : baseMat->GetPipeline();
 
     // Check if we have a Batch with the same pipeline yet
     auto batch = std::find_if(batches.begin(), batches.end(), [&](const SHBatch& batch)

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHGraphicsSystem.cpp

@@ -890,7 +890,9 @@ namespace SHADE
       Handle<SHMaterialInstance> prevMaterial = renderable.HasMaterialChanged() ? renderable.GetPrevMaterial() : renderable.GetMaterial();
       if (prevMaterial)
       {
-        Handle<SHSuperBatch> oldSuperBatch = prevMaterial->GetBaseMaterial()->GetPipeline()->GetPipelineState().GetSubpass()->GetSuperBatch();
+        Handle<SHMaterial> baseMat = prevMaterial->GetBaseMaterial();
+        Handle<SHVkPipeline> prevPipeline = baseMat->HasPipelineChanged() ? baseMat->GetPrevPipeline() : baseMat->GetPipeline();
+        Handle<SHSuperBatch> oldSuperBatch = prevPipeline->GetPipelineState().GetSubpass()->GetSuperBatch();
         oldSuperBatch->Remove(&renderable);
       }
 
@@ -905,6 +907,14 @@ namespace SHADE
       // Unset change flag
       renderable.ResetChangedFlag();
     }
+
+    // Unset all material old pipeline since we would have finished processing
+    auto gfxSystem = reinterpret_cast<SHGraphicsSystem*>(system);
+    auto [matBegin, matEnd] = gfxSystem->resourceManager.GetDenseAccess<SHMaterial>();
+    for (auto iter = matBegin; iter != matEnd; ++iter)
+    {
+      iter->ForgetOldPipeline();
+    }
   }
 #pragma endregion ROUTINES
 

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHMaterial.cpp

@@ -21,6 +21,8 @@ namespace SHADE
     if (_pipeline == pipeline)
       return;
 
+    // Mark old pipeline and set new pipeline
+    oldPipeline = pipeline;
     pipeline = _pipeline;
 
     // Set up properties based on the pipeline
@@ -41,9 +43,6 @@ namespace SHADE
     
     // Reset since pipeline changed
     ResetProperties();
-
-    // Mark changed so that we know to update dependent material instances
-    propertiesChanged = true;
   }
 
   Handle<SHVkPipeline> SHMaterial::GetPipeline() const
@@ -111,4 +110,9 @@ namespace SHADE
   {
     propertiesChanged = false;
   }
+
+  void SHMaterial::ForgetOldPipeline() noexcept
+  {
+    oldPipeline = {};
+  }
 }

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHMaterial.h

@@ -44,6 +44,7 @@ namespace SHADE
 		/*-----------------------------------------------------------------------------*/
 		void SetPipeline(Handle<SHVkPipeline> _pipeline);
 		Handle<SHVkPipeline> GetPipeline() const;
+		Handle<SHVkPipeline> GetPrevPipeline() const { return oldPipeline; };
 
 		/*-----------------------------------------------------------------------------*/
 		/* Property Functions                                                          */
@@ -68,10 +69,11 @@ namespace SHADE
         /* Query Functions                                                             */
         /*-----------------------------------------------------------------------------*/
 		Handle<SHShaderBlockInterface> GetShaderBlockInterface() const noexcept;
-        bool HasPipelineChanged() const noexcept { return pipelineChanged; }
+        bool HasPipelineChanged() const noexcept { return oldPipeline; }
         bool HasPropertiesChanged() const noexcept { return propertiesChanged; }
-        bool HasChanged() const noexcept { return pipelineChanged || propertiesChanged; }
+        bool HasChanged() const noexcept { return oldPipeline || propertiesChanged; }
         void ClearChangeFlag() noexcept;
+        void ForgetOldPipeline() noexcept;
 
 	  private:
 		/*-----------------------------------------------------------------------------*/
@@ -81,7 +83,7 @@ namespace SHADE
 		std::unique_ptr<char> propMemory;
 		Byte                  propMemorySize = 0;
         bool                  propertiesChanged = true;
-        bool                  pipelineChanged = true;
+        Handle<SHVkPipeline>  oldPipeline;
 
         /*-----------------------------------------------------------------------------*/
         /* Helper Functions                                                            */