[hud] Implement compiler activity display as a HUD item

src/dxvk/hud/dxvk_hud.cpp

@@ -44,6 +44,7 @@ namespace dxvk::hud {
     addItem<HudPipelineStatsItem>("pipelines", device);
     addItem<HudMemoryStatsItem>("memory", device);
     addItem<HudGpuLoadItem>("gpuload", device);
+    addItem<HudCompilerActivityItem>("compiler", device);
   }
   
   

src/dxvk/hud/dxvk_hud_item.cpp

@@ -477,4 +477,45 @@ namespace dxvk::hud {
     return position;
   }
 
+
+  HudCompilerActivityItem::HudCompilerActivityItem(const Rc<DxvkDevice>& device)
+  : m_device(device) {
+
+  }
+
+
+  HudCompilerActivityItem::~HudCompilerActivityItem() {
+
+  }
+
+
+  void HudCompilerActivityItem::update(dxvk::high_resolution_clock::time_point time) {
+    DxvkStatCounters counters = m_device->getStatCounters();
+    bool doShow = counters.getCtr(DxvkStatCounter::PipeCompilerBusy);
+
+    if (!doShow) {
+      auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(time - m_timeShown);
+      doShow = elapsed.count() <= MinShowDuration;
+    }
+
+    if (doShow && !m_show)
+      m_timeShown = time;
+
+    m_show = doShow;
+  }
+
+
+  HudPos HudCompilerActivityItem::render(
+          HudRenderer&      renderer,
+          HudPos            position) {
+    if (m_show) {
+      renderer.drawText(16.0f,
+        { position.x, renderer.surfaceSize().height - 20.0f },
+        { 1.0f, 1.0f, 1.0f, 1.0f },
+        "Compiling shaders...");
+    }
+
+    return position;
+  }
+
 }

src/dxvk/hud/dxvk_hud_item.h

@@ -354,4 +354,33 @@ namespace dxvk::hud {
 
   };
 
+
+  /**
+   * \brief HUD item to display pipeline compiler activity
+   */
+  class HudCompilerActivityItem : public HudItem {
+    constexpr static int64_t MinShowDuration = 1500;
+  public:
+
+    HudCompilerActivityItem(const Rc<DxvkDevice>& device);
+
+    ~HudCompilerActivityItem();
+
+    void update(dxvk::high_resolution_clock::time_point time);
+
+    HudPos render(
+            HudRenderer&      renderer,
+            HudPos            position);
+
+  private:
+
+    Rc<DxvkDevice> m_device;
+
+    bool m_show = false;
+
+    dxvk::high_resolution_clock::time_point m_timeShown
+      = dxvk::high_resolution_clock::now();
+
+  };
+
 }