Improvements to pass statistics and SRG debugability

Signed-off-by: antonmic <56370189+antonmic@users.noreply.github.com>

Gems/Atom/RPI/Code/Source/RPI.Public/Pass/PassSystem.cpp

@@ -308,6 +308,7 @@ namespace AZ
             AZ_PROFILE_FUNCTION(AZ::Debug::ProfileCategory::AzRender);
             AZ_ATOM_PROFILE_FUNCTION("RPI", "PassSystem: FrameUpdate");
 
+            ResetFrameStatistics();
             ProcessQueuedChanges();
 
             m_state = PassSystemState::Rendering;
@@ -392,6 +393,29 @@ namespace AZ
             handler.Connect(m_loadTemplatesEvent);
         }
 
+        void PassSystem::ResetFrameStatistics()
+        {
+            m_frameStatistics.m_numRenderPassesExecuted = 0;
+            m_frameStatistics.m_totalDrawItemsRendered = 0;
+            m_frameStatistics.m_maxDrawItemsRenderedInAPass = 0;
+        }
+
+        PassSystemFrameStatistics PassSystem::GetFrameStatistics()
+        {
+            return m_frameStatistics;
+        }
+
+        void PassSystem::IncrementFrameDrawItemCount(u32 numDrawItems)
+        {
+            m_frameStatistics.m_totalDrawItemsRendered += numDrawItems;
+            m_frameStatistics.m_maxDrawItemsRenderedInAPass = AZStd::max(m_frameStatistics.m_maxDrawItemsRenderedInAPass, numDrawItems);
+        }
+
+        void PassSystem::IncrementFrameRenderPassCount()
+        {
+            ++m_frameStatistics.m_numRenderPassesExecuted;
+        }
+
         // --- Pass Factory Functions --- 
 
         void PassSystem::AddPassCreator(Name className, PassCreator createFunction)