[hud] Add 'api' option to show the client API

src/dxvk/hud/dxvk_hud.cpp

@@ -90,6 +90,14 @@ namespace dxvk::hud {
       position.y += 24.0f;
     }
 
+    if (m_config.elements.test(HudElement::DxvkClientApi)) {
+      m_renderer.drawText(ctx, 16.0f,
+        { position.x, position.y },
+        { 1.0f, 1.0f, 1.0f, 1.0f },
+        m_device->clientApi());
+      position.y += 24.0f;
+    }
+
     if (m_config.elements.test(HudElement::DeviceInfo)) {
       position = m_hudDeviceInfo.render(
         ctx, m_renderer, position);

src/dxvk/hud/dxvk_hud_config.cpp

@@ -13,6 +13,7 @@ namespace dxvk::hud {
     { "pipelines",    HudElement::StatPipelines     },
     { "memory",       HudElement::StatMemory        },
     { "version",      HudElement::DxvkVersion       },
+    { "api",          HudElement::DxvkClientApi     },
   }};
   
   

src/dxvk/hud/dxvk_hud_config.h

@@ -19,6 +19,7 @@ namespace dxvk::hud {
     StatPipelines     = 5,
     StatMemory        = 6,
     DxvkVersion       = 7,
+    DxvkClientApi     = 8,
   };
   
   using HudElements = Flags<HudElement>;