From 8b67ef724e5bd7b59dbfd497b84794a9fe33dcca Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Wed, 9 Jun 2021 03:46:12 +0200
Subject: [PATCH] [d3d11] Add frame rate limiter and dxgi.maxFrameRate option

---
 dxvk.conf                     | 1 +
 src/d3d11/d3d11_options.cpp   | 1 +
 src/d3d11/d3d11_options.h     | 3 +++
 src/d3d11/d3d11_swapchain.cpp | 3 +++
 src/d3d11/d3d11_swapchain.h   | 2 ++
 5 files changed, 10 insertions(+)

diff --git a/dxvk.conf b/dxvk.conf
index 349dc944..332c88c4 100644
--- a/dxvk.conf
+++ b/dxvk.conf
@@ -24,6 +24,7 @@
 # 
 # Supported values : Any non-negative integer
 
+# dxgi.maxFrameRate = 0
 # d3d9.maxFrameRate = 0
 
 
diff --git a/src/d3d11/d3d11_options.cpp b/src/d3d11/d3d11_options.cpp
index b807a2d1..558829d6 100644
--- a/src/d3d11/d3d11_options.cpp
+++ b/src/d3d11/d3d11_options.cpp
@@ -19,6 +19,7 @@ namespace dxvk {
     this->deferSurfaceCreation  = config.getOption<bool>("dxgi.deferSurfaceCreation", false);
     this->numBackBuffers        = config.getOption<int32_t>("dxgi.numBackBuffers", 0);
     this->maxFrameLatency       = config.getOption<int32_t>("dxgi.maxFrameLatency", 0);
+    this->maxFrameRate          = config.getOption<int32_t>("dxgi.maxFrameRate", 0);
     this->syncInterval          = config.getOption<int32_t>("dxgi.syncInterval", -1);
     this->tearFree              = config.getOption<Tristate>("dxgi.tearFree", Tristate::Auto);
 
diff --git a/src/d3d11/d3d11_options.h b/src/d3d11/d3d11_options.h
index 2949ca3d..a948aa0a 100644
--- a/src/d3d11/d3d11_options.h
+++ b/src/d3d11/d3d11_options.h
@@ -83,6 +83,9 @@ namespace dxvk {
     /// a higher value. May help with frame timing issues.
     int32_t maxFrameLatency;
 
+    /// Limit frame rate
+    int32_t maxFrameRate;
+
     /// Defer surface creation until first present call. This
     /// fixes issues with games that create multiple swap chains
     /// for a single window that may interfere with each other.
diff --git a/src/d3d11/d3d11_swapchain.cpp b/src/d3d11/d3d11_swapchain.cpp
index de302a8a..a78515df 100644
--- a/src/d3d11/d3d11_swapchain.cpp
+++ b/src/d3d11/d3d11_swapchain.cpp
@@ -380,6 +380,9 @@ namespace dxvk {
       presenterDevice,
       presenterDesc);
     
+    m_presenter->setFrameRateLimit(m_parent->GetOptions()->maxFrameRate);
+    m_presenter->setFrameRateLimiterRefreshRate(m_displayRefreshRate);
+
     CreateRenderTargetViews();
   }
 
diff --git a/src/d3d11/d3d11_swapchain.h b/src/d3d11/d3d11_swapchain.h
index 944ab696..65e1f5f9 100644
--- a/src/d3d11/d3d11_swapchain.h
+++ b/src/d3d11/d3d11_swapchain.h
@@ -108,6 +108,8 @@ namespace dxvk {
     bool                    m_dirty = true;
     bool                    m_vsync = true;
 
+    double                  m_displayRefreshRate = 0.0;
+
     HRESULT PresentImage(UINT SyncInterval);
 
     void SubmitPresent(