From f10074d9897850b9b746ff8d8e0b2dc4af24f3ff Mon Sep 17 00:00:00 2001
From: Nicolas James <nj3ahxac@gmail.com>
Date: Tue, 10 Mar 2026 22:41:39 +1100
Subject: Don't advertise anti lag if the PD doesn't support it

---
 src/physical_device_context.cc | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'src/physical_device_context.cc')

diff --git a/src/physical_device_context.cc b/src/physical_device_context.cc
index 45be10e..de63b3d 100644
--- a/src/physical_device_context.cc
+++ b/src/physical_device_context.cc
@@ -1,6 +1,11 @@
 #include "physical_device_context.hh"
 #include <vulkan/vulkan_core.h>
 
+#include <ranges>
+#include <string_view>
+#include <unordered_set>
+#include <vector>
+
 namespace low_latency {
 
 PhysicalDeviceContext::PhysicalDeviceContext(
@@ -29,6 +34,27 @@ PhysicalDeviceContext::PhysicalDeviceContext(
 
         return std::make_unique<qp_t>(std::move(result));
     }();
+
+    this->supports_required_extensions = [&]() {
+        auto count = std::uint32_t{};
+        vtable.EnumerateDeviceExtensionProperties(physical_device, nullptr,
+                                                  &count, nullptr);
+
+        auto supported_extensions = std::vector<VkExtensionProperties>(count);
+        vtable.EnumerateDeviceExtensionProperties(
+            physical_device, nullptr, &count, std::data(supported_extensions));
+
+        const auto supported_extension_names =
+            supported_extensions |
+            std::views::transform(
+                [](const auto& supported) { return supported.extensionName; }) |
+            std::ranges::to<std::unordered_set<std::string_view>>();
+
+        return std::ranges::all_of(
+            this->required_extensions, [&](const auto& required_extension) {
+                return supported_extension_names.contains(required_extension);
+            });
+    }();
 }
 
 PhysicalDeviceContext::~PhysicalDeviceContext() {}
-- 
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