Eliminate redundant vkCmdBindPipeline calls

kraken/KRPipeline.cpp

@@ -842,7 +842,10 @@ bool KRPipeline::bind(KRNode::RenderInfo& ri, const Matrix4& matModel)
     }
   }
 
-  vkCmdBindPipeline(ri.commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, m_graphicsPipeline);
+  if (ri.pipeline != this) {
+    vkCmdBindPipeline(ri.commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, m_graphicsPipeline);
+    ri.pipeline = this;
+  }
 
   return true;
 }

kraken/nodes/KRNode.h

@@ -56,6 +56,7 @@ class KRPointLight;
 class KRSpotLight;
 class KRDirectionalLight;
 class KRRenderPass;
+class KRPipeline;
 namespace tinyxml2 {
 class XMLNode;
 class XMLAttribute;
@@ -92,6 +93,7 @@ public:
     std::vector<KRSpotLight*> spot_lights;
     KRViewport* viewport;
     KRRenderPass* renderPass;
+    KRPipeline* pipeline;
   };
 
   static void InitNodeInfo(KrNodeInfo* nodeInfo);