From 044e3967e7a74c8843d4142a64b5194f9320a4ea Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Mon, 15 Apr 2019 12:42:07 +0200
Subject: [PATCH] [hud] Show compiler activity indicator for at least one
 second

Otherwise this would flicker when shaders are already cached.
---
 src/dxvk/hud/dxvk_hud_stats.cpp | 16 ++++++++++++++--
 src/dxvk/hud/dxvk_hud_stats.h   |  4 ++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/dxvk/hud/dxvk_hud_stats.cpp b/src/dxvk/hud/dxvk_hud_stats.cpp
index ad94d7965..7160f7009 100644
--- a/src/dxvk/hud/dxvk_hud_stats.cpp
+++ b/src/dxvk/hud/dxvk_hud_stats.cpp
@@ -3,7 +3,8 @@
 namespace dxvk::hud {
   
   HudStats::HudStats(HudElements elements)
-  : m_elements(filterElements(elements)) { }
+  : m_elements(filterElements(elements)),
+    m_compilerShowTime(std::chrono::high_resolution_clock::now()) { }
   
   
   HudStats::~HudStats() {
@@ -153,8 +154,19 @@ namespace dxvk::hud {
     const Rc<DxvkContext>&  context,
           HudRenderer&      renderer,
           HudPos            position) {
+    auto now    = std::chrono::high_resolution_clock::now();
+    bool doShow = m_prevCounters.getCtr(DxvkStatCounter::PipeCompilerBusy);
+
+    if (m_prevCounters.getCtr(DxvkStatCounter::PipeCompilerBusy)
+     && m_diffCounters.getCtr(DxvkStatCounter::PipeCompilerBusy))
+      m_compilerShowTime = now;
     
-    if (m_prevCounters.getCtr(DxvkStatCounter::PipeCompilerBusy)) {
+    if (!doShow) {
+      doShow |= std::chrono::duration_cast<std::chrono::milliseconds>(now - m_compilerShowTime)
+              < std::chrono::milliseconds(1000);
+    }
+    
+    if (doShow) {
       renderer.drawText(context, 16.0f,
         { position.x, position.y },
         { 1.0f, 1.0f, 1.0f, 1.0f },
diff --git a/src/dxvk/hud/dxvk_hud_stats.h b/src/dxvk/hud/dxvk_hud_stats.h
index 86f8091e7..89009af5a 100644
--- a/src/dxvk/hud/dxvk_hud_stats.h
+++ b/src/dxvk/hud/dxvk_hud_stats.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <chrono>
+
 #include "../dxvk_stats.h"
 
 #include "dxvk_hud_config.h"
@@ -35,6 +37,8 @@ namespace dxvk::hud {
     
     DxvkStatCounters  m_prevCounters;
     DxvkStatCounters  m_diffCounters;
+
+    std::chrono::high_resolution_clock::time_point m_compilerShowTime;
     
     HudPos printDrawCallStats(
       const Rc<DxvkContext>&  context,