From 35d629a7302c260d5711af8bfa0db24739e360f4 Mon Sep 17 00:00:00 2001
From: squidbus <175574877+squidbus@users.noreply.github.com>
Date: Fri, 12 Jul 2024 00:20:23 -0700
Subject: [PATCH] Downgrade Vulkan requirement to 1.2 with extensions.

---
 src/video_core/renderer_vulkan/vk_instance.cpp | 15 ++++++++++-----
 src/video_core/renderer_vulkan/vk_platform.h   |  2 +-
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/video_core/renderer_vulkan/vk_instance.cpp b/src/video_core/renderer_vulkan/vk_instance.cpp
index 430cb73df..7fc981ee4 100644
--- a/src/video_core/renderer_vulkan/vk_instance.cpp
+++ b/src/video_core/renderer_vulkan/vk_instance.cpp
@@ -180,6 +180,8 @@ bool Instance::CreateDevice() {
     color_write_en = add_extension(VK_EXT_COLOR_WRITE_ENABLE_EXTENSION_NAME);
     color_write_en &= add_extension(VK_EXT_EXTENDED_DYNAMIC_STATE_3_EXTENSION_NAME);
     const auto calibrated_timestamps = add_extension(VK_EXT_CALIBRATED_TIMESTAMPS_EXTENSION_NAME);
+    add_extension(VK_KHR_DYNAMIC_RENDERING_EXTENSION_NAME);
+    add_extension(VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_EXTENSION_NAME);
 
     const auto family_properties = physical_device.getQueueFamilyProperties();
     if (family_properties.empty()) {
@@ -210,7 +212,6 @@ bool Instance::CreateDevice() {
     };
 
     const auto vk12_features = feature_chain.get<vk::PhysicalDeviceVulkan12Features>();
-    const auto vk13_features = feature_chain.get<vk::PhysicalDeviceVulkan13Features>();
     vk::StructureChain device_chain = {
         vk::DeviceCreateInfo{
             .queueCreateInfoCount = 1u,
@@ -244,10 +245,14 @@ bool Instance::CreateDevice() {
             .hostQueryReset = vk12_features.hostQueryReset,
             .timelineSemaphore = vk12_features.timelineSemaphore,
         },
-        vk::PhysicalDeviceVulkan13Features{
-            .shaderDemoteToHelperInvocation = vk13_features.shaderDemoteToHelperInvocation,
-            .dynamicRendering = vk13_features.dynamicRendering,
-            .maintenance4 = vk13_features.maintenance4,
+        vk::PhysicalDeviceMaintenance4FeaturesKHR{
+            .maintenance4 = true,
+        },
+        vk::PhysicalDeviceDynamicRenderingFeaturesKHR{
+            .dynamicRendering = true,
+        },
+        vk::PhysicalDeviceShaderDemoteToHelperInvocationFeaturesEXT{
+            .shaderDemoteToHelperInvocation = true,
         },
         vk::PhysicalDeviceCustomBorderColorFeaturesEXT{
             .customBorderColors = true,
diff --git a/src/video_core/renderer_vulkan/vk_platform.h b/src/video_core/renderer_vulkan/vk_platform.h
index 793f2f3e6..582de3831 100644
--- a/src/video_core/renderer_vulkan/vk_platform.h
+++ b/src/video_core/renderer_vulkan/vk_platform.h
@@ -17,7 +17,7 @@ class WindowSDL;
 
 namespace Vulkan {
 
-constexpr u32 TargetVulkanApiVersion = VK_API_VERSION_1_3;
+constexpr u32 TargetVulkanApiVersion = VK_API_VERSION_1_2;
 
 vk::SurfaceKHR CreateSurface(vk::Instance instance, const Frontend::WindowSDL& emu_window);