From 7d73f0dcadf5637c6041b602096fef8155a146ba Mon Sep 17 00:00:00 2001
From: Lynix <lynix680@gmail.com>
Date: Sun, 19 Jun 2016 15:31:53 +0200
Subject: [PATCH] Vulkan: Add physical device retrieval

Former-commit-id: 5c0e8256123fcfe5d3563b224bdcc11efa645fd3 [formerly cecb3404e98b1be4a5176fe27c1dec533e16701a]
Former-commit-id: a2fa7f6d96e3fe6f43af97b5c882d939a947fb9a
---
 include/Nazara/Vulkan/VkPhysicalDevice.hpp | 28 +++++++++++++++
 include/Nazara/Vulkan/Vulkan.hpp           |  6 ++++
 src/Nazara/Vulkan/Vulkan.cpp               | 41 ++++++++++++++++++++++
 3 files changed, 75 insertions(+)
 create mode 100644 include/Nazara/Vulkan/VkPhysicalDevice.hpp

diff --git a/include/Nazara/Vulkan/VkPhysicalDevice.hpp b/include/Nazara/Vulkan/VkPhysicalDevice.hpp
new file mode 100644
index 000000000..e62a9e684
--- /dev/null
+++ b/include/Nazara/Vulkan/VkPhysicalDevice.hpp
@@ -0,0 +1,28 @@
+// Copyright (C) 2016 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Vulkan"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_VULKAN_VKPHYSICALDEVICE_HPP
+#define NAZARA_VULKAN_VKPHYSICALDEVICE_HPP
+
+#include <vulkan/vulkan.h>
+#include <vector>
+
+namespace Nz 
+{
+	namespace Vk
+	{
+		struct PhysicalDevice
+		{
+			VkPhysicalDevice device;
+			VkPhysicalDeviceFeatures features;
+			VkPhysicalDeviceMemoryProperties memoryProperties;
+			VkPhysicalDeviceProperties properties;
+			std::vector<VkQueueFamilyProperties> queues;
+		};
+	}
+}
+
+#endif // NAZARA_VULKAN_VKPHYSICALDEVICE_HPP
diff --git a/include/Nazara/Vulkan/Vulkan.hpp b/include/Nazara/Vulkan/Vulkan.hpp
index d5667ce95..289a1b225 100644
--- a/include/Nazara/Vulkan/Vulkan.hpp
+++ b/include/Nazara/Vulkan/Vulkan.hpp
@@ -13,7 +13,10 @@
 #include <Nazara/Vulkan/Config.hpp>
 #include <Nazara/Vulkan/VkDevice.hpp>
 #include <Nazara/Vulkan/VkInstance.hpp>
+#include <Nazara/Vulkan/VkPhysicalDevice.hpp>
 #include <Nazara/Vulkan/VkSurface.hpp>
+#include <list>
+#include <vector>
 
 namespace Nz
 {
@@ -27,6 +30,8 @@ namespace Nz
 
 			static Vk::Instance& GetInstance();
 
+			static const std::vector<Vk::PhysicalDevice>& GetPhysicalDevices();
+			
 			static bool Initialize();
 
 			static bool IsInitialized();
@@ -39,6 +44,7 @@ namespace Nz
 
 		private:
 			static std::list<Vk::Device> s_devices;
+			static std::vector<Vk::PhysicalDevice> s_physDevices;
 			static Vk::Instance s_instance;
 			static ParameterList s_initializationParameters;
 			static unsigned int s_moduleReferenceCounter;
diff --git a/src/Nazara/Vulkan/Vulkan.cpp b/src/Nazara/Vulkan/Vulkan.cpp
index f97cc635f..d73e2e21f 100644
--- a/src/Nazara/Vulkan/Vulkan.cpp
+++ b/src/Nazara/Vulkan/Vulkan.cpp
@@ -19,6 +19,11 @@ namespace Nz
 		return s_instance;
 	}
 
+	const std::vector<Vk::PhysicalDevice>& Vulkan::GetPhysicalDevices()
+	{
+		return s_physDevices;
+	}
+
 	bool Vulkan::Initialize()
 	{
 		if (s_moduleReferenceCounter > 0)
@@ -147,6 +152,41 @@ namespace Nz
 			return false;
 		}
 
+		std::vector<VkPhysicalDevice> physDevices;
+		if (!s_instance.EnumeratePhysicalDevices(&physDevices))
+		{
+			NazaraError("Failed to enumerate physical devices");
+			return false;
+		}
+
+		s_physDevices.reserve(physDevices.size());
+
+		for (std::size_t i = 0; i < physDevices.size(); ++i)
+		{
+			VkPhysicalDevice physDevice = physDevices[i];
+
+			Vk::PhysicalDevice deviceInfo;
+			if (!s_instance.GetPhysicalDeviceQueueFamilyProperties(physDevice, &deviceInfo.queues))
+			{
+				NazaraWarning("Failed to query physical device queue family properties");
+				continue;
+			}
+
+			deviceInfo.device = physDevice;
+
+			s_instance.GetPhysicalDeviceFeatures(physDevice, &deviceInfo.features);
+			s_instance.GetPhysicalDeviceMemoryProperties(physDevice, &deviceInfo.memoryProperties);
+			s_instance.GetPhysicalDeviceProperties(physDevice, &deviceInfo.properties);
+
+			s_physDevices.emplace_back(std::move(deviceInfo));
+		}
+
+		if (s_physDevices.empty())
+		{
+			NazaraError("No valid physical device found");
+			return false;
+		}
+
 		onExit.Reset();
 
 		NazaraNotice("Initialized: Vulkan module");
@@ -332,6 +372,7 @@ namespace Nz
 	}
 
 	std::list<Vk::Device> Vulkan::s_devices;
+	std::vector<Vk::PhysicalDevice> Vulkan::s_physDevices;
 	Vk::Instance Vulkan::s_instance;
 	ParameterList Vulkan::s_initializationParameters;
 	unsigned int Vulkan::s_moduleReferenceCounter = 0;