[atom_cpu_profiler_gem_promotion] additional APIs for external control of the CPU profiler and visualization

Signed-off-by: AMZN-ScottR <24445312+AMZN-ScottR@users.noreply.github.com>

Gems/Profiler/Code/Source/ProfilerImGuiSystemComponent.cpp

@@ -61,13 +61,10 @@ namespace Profiler
     {
     }
 
-    void ProfilerImGuiSystemComponent::Init()
-    {
-    }
-
     void ProfilerImGuiSystemComponent::Activate()
     {
 #if defined(IMGUI_ENABLED)
+        ProfilerImGuiRequestBus::Handler::BusConnect();
         ImGui::ImGuiUpdateListenerBus::Handler::BusConnect();
 #endif // defined(IMGUI_ENABLED)
     }
@@ -75,16 +72,22 @@ namespace Profiler
     void ProfilerImGuiSystemComponent::Deactivate()
     {
 #if defined(IMGUI_ENABLED)
+        ProfilerImGuiRequestBus::Handler::BusDisconnect();
         ImGui::ImGuiUpdateListenerBus::Handler::BusDisconnect();
 #endif // defined(IMGUI_ENABLED)
     }
 
 #if defined(IMGUI_ENABLED)
+    void ProfilerImGuiSystemComponent::ShowCpuProfilerWindow(bool& keepDrawing)
+    {
+        m_imguiCpuProfiler.Draw(keepDrawing);
+    }
+
     void ProfilerImGuiSystemComponent::OnImGuiUpdate()
     {
         if (m_showCpuProfiler)
         {
-            m_imguiCpuProfiler.Draw(m_showCpuProfiler);
+            ShowCpuProfilerWindow(m_showCpuProfiler);
         }
     }
 

Gems/Profiler/Code/Source/ProfilerImGuiSystemComponent.h

@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include <Profiler/ProfilerBus.h>
+#include <Profiler/ProfilerImGuiBus.h>
 
 #include <ImGuiCpuProfiler.h>
 
@@ -24,6 +24,7 @@ namespace Profiler
     class ProfilerImGuiSystemComponent
         : public AZ::Component
 #if defined(IMGUI_ENABLED)
+        , public ProfilerImGuiRequestBus::Handler
         , public ImGui::ImGuiUpdateListenerBus::Handler
 #endif // defined(IMGUI_ENABLED)
     {
@@ -42,11 +43,13 @@ namespace Profiler
 
     protected:
         // AZ::Component interface implementation
-        void Init() override;
         void Activate() override;
         void Deactivate() override;
 
 #if defined(IMGUI_ENABLED)
+        // ProfilerImGuiRequestBus interface implementation
+        void ShowCpuProfilerWindow(bool& keepDrawing) override;
+
         // ImGuiUpdateListenerBus overrides
         void OnImGuiUpdate() override;
         void OnImGuiMainMenuUpdate() override;

Gems/Profiler/Code/Source/ProfilerSystemComponent.cpp

@@ -200,6 +200,11 @@ namespace Profiler
         }
     }
 
+    void ProfilerSystemComponent::SetProfilerEnabled(bool enabled)
+    {
+        m_cpuProfiler.SetProfilerEnabled(enabled);
+    }
+
     bool ProfilerSystemComponent::CaptureCpuProfilingStatistics(const AZStd::string& outputFilePath)
     {
         bool expected = false;

Gems/Profiler/Code/Source/ProfilerSystemComponent.h

@@ -39,6 +39,7 @@ namespace Profiler
         void Deactivate() override;
 
         // ProfilerRequestBus interface implementation
+        void SetProfilerEnabled(bool enabled) override;
         bool CaptureCpuProfilingStatistics(const AZStd::string& outputFilePath) override;
         bool BeginContinuousCpuProfilingCapture() override;
         bool EndContinuousCpuProfilingCapture(const AZStd::string& outputFilePath) override;