Add device extension query to common library

Author: solidpixel

source_common/framework/manual_functions.cpp

@@ -215,6 +215,42 @@ std::vector<std::string> getInstanceExtensionList(
     return foundExtensions;
 }
 
+/* See header for documentation. */
+std::vector<std::string> getDeviceExtensionList(
+    VkInstance instance,
+    VkPhysicalDevice physicalDevice,
+    const VkDeviceCreateInfo* pCreateInfo
+) {
+    std::vector<std::string> foundExtensions;
+
+    // Fetch the functions needed to query extensions availability
+    auto* chainInfo = getChainInfo(pCreateInfo);
+    auto fpGetProcAddr = chainInfo->u.pLayerInfo->pfnNextGetInstanceProcAddr;
+    auto fpGetExtensionsRaw = fpGetProcAddr(instance, "vkEnumerateDeviceExtensionProperties");
+    auto fpGetExtensions = reinterpret_cast<PFN_vkEnumerateDeviceExtensionProperties>(fpGetExtensionsRaw);
+    if (!fpGetExtensions)
+    {
+        return foundExtensions;
+    }
+
+    // Query number of extensions
+    uint32_t count;
+    fpGetExtensions(physicalDevice, nullptr, &count, nullptr);
+
+    // Reserve memory for, and then query, the extensions
+    std::vector<VkExtensionProperties> extensions;
+    extensions.resize(count);
+    fpGetExtensions(physicalDevice, nullptr, &count, extensions.data());
+
+    // Build the function return list
+    for (uint32_t i = 0; i < count; i++)
+    {
+        foundExtensions.emplace_back(extensions[i].extensionName);
+    }
+
+    return foundExtensions;
+}
+
 /* See header for documentation. */
 bool isInExtensionList(
     const std::string& target,

source_common/framework/manual_functions.hpp

@@ -119,6 +119,20 @@ PFN_vkVoidFunction getDeviceLayerFunction(
 std::vector<std::string> getInstanceExtensionList(
     const VkInstanceCreateInfo* pCreateInfo);
 
+/**
+ * @brief Fetch the list of supported extensions from a physical device.
+ *
+ * @param instance         The instance we are connected to.
+ * @param physicalDevice   The physical device to query.
+ * @param pCreateInfo      The device creation data from the loader.
+ *
+ * @return The list of supported extensions; empty list on failure.
+ */
+std::vector<std::string> getDeviceExtensionList(
+    VkInstance instance,
+    VkPhysicalDevice physicalDevice,
+    const VkDeviceCreateInfo* pCreateInfo);
+
 /**
  * @brief Is an extension in the passed extension list.
  *