From 73789e58aa6dad11550e8f005f5e7d4e834184f9 Mon Sep 17 00:00:00 2001
From: Joshua Goins <josh@redstrate.com>
Date: Thu, 8 Nov 2018 13:27:24 -0500
Subject: [PATCH] Make vsync user configurable

---
 include/renderer.h | 1 +
 src/main.cpp       | 2 ++
 src/renderer.cpp   | 2 +-
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/renderer.h b/include/renderer.h
index 8af8919..8f3e730 100644
--- a/include/renderer.h
+++ b/include/renderer.h
@@ -70,6 +70,7 @@ struct RenderTarget {
 
 struct GraphicsConfig {
     int shadowResolution, dofDownscale;
+    bool vsync = true;
 };
 
 class World;
diff --git a/src/main.cpp b/src/main.cpp
index fa035b8..a5b856e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -75,6 +75,7 @@ void readConfig() {
     windowFullscreen = toInt(config.get("Window", "fullscreen"));
 
     currentGraphicsPreset = config.get("Graphics", "preset");
+    graphicsConfig.vsync = toInt(config.get("Graphics", "vsync"));
 
     loadGraphicsConfig();
 }
@@ -89,6 +90,7 @@ void writeConfig() {
     config.set("Window", "fullscreen", std::to_string(windowFullscreen));
 
     config.set("Graphics", "preset", currentGraphicsPreset);
+    config.set("Graphics", "vsync", std::to_string(graphicsConfig.vsync));
 
     config.save("user.cfg");
 }
diff --git a/src/renderer.cpp b/src/renderer.cpp
index 538d57a..271841a 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -197,7 +197,7 @@ RenderTarget* Renderer::createSurfaceRenderTarget(VkSurfaceKHR surface, RenderTa
     swapchainCreateInfo.pQueueFamilyIndices = &queueIndices.presentation;
     swapchainCreateInfo.preTransform = surfaceCapabilities.currentTransform;
     swapchainCreateInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
-    swapchainCreateInfo.presentMode = VK_PRESENT_MODE_FIFO_KHR;
+    swapchainCreateInfo.presentMode = config_.vsync ? VK_PRESENT_MODE_FIFO_KHR : VK_PRESENT_MODE_IMMEDIATE_KHR;
     swapchainCreateInfo.clipped = VK_TRUE;
 
     if(oldTarget != nullptr)