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- /*
- * Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <AK/Format.h>
- #include <AK/Vector.h>
- #include <LibCore/VulkanContext.h>
- namespace Core {
- static ErrorOr<VkInstance> create_instance(uint32_t api_version)
- {
- VkInstance instance;
- VkApplicationInfo app_info {};
- app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
- app_info.pApplicationName = "Ladybird";
- app_info.applicationVersion = VK_MAKE_VERSION(1, 0, 0);
- app_info.pEngineName = nullptr;
- app_info.engineVersion = VK_MAKE_VERSION(1, 0, 0);
- app_info.apiVersion = api_version;
- VkInstanceCreateInfo create_info {};
- create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
- create_info.pApplicationInfo = &app_info;
- auto result = vkCreateInstance(&create_info, nullptr, &instance);
- if (result != VK_SUCCESS) {
- dbgln("vkCreateInstance returned {}", to_underlying(result));
- return Error::from_string_literal("Application instance creation failed");
- }
- return instance;
- }
- static ErrorOr<VkPhysicalDevice> pick_physical_device(VkInstance instance)
- {
- uint32_t device_count = 0;
- vkEnumeratePhysicalDevices(instance, &device_count, nullptr);
- if (device_count == 0)
- return Error::from_string_literal("Can't find any physical devices available");
- Vector<VkPhysicalDevice> devices;
- devices.resize(device_count);
- vkEnumeratePhysicalDevices(instance, &device_count, devices.data());
- VkPhysicalDevice picked_device = VK_NULL_HANDLE;
- // Pick discrete GPU or the first device in the list
- for (auto const& device : devices) {
- if (picked_device == VK_NULL_HANDLE)
- picked_device = device;
- VkPhysicalDeviceProperties device_properties;
- vkGetPhysicalDeviceProperties(device, &device_properties);
- if (device_properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
- picked_device = device;
- }
- if (picked_device != VK_NULL_HANDLE)
- return picked_device;
- VERIFY_NOT_REACHED();
- }
- static ErrorOr<VkDevice> create_logical_device(VkPhysicalDevice physical_device)
- {
- VkDevice device;
- uint32_t queue_family_count = 0;
- vkGetPhysicalDeviceQueueFamilyProperties(physical_device, &queue_family_count, nullptr);
- Vector<VkQueueFamilyProperties> queue_families;
- queue_families.resize(queue_family_count);
- vkGetPhysicalDeviceQueueFamilyProperties(physical_device, &queue_family_count, queue_families.data());
- int graphics_queue_family_index = -1;
- for (int i = 0; i < static_cast<int>(queue_families.size()); i++) {
- if (queue_families[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) {
- graphics_queue_family_index = i;
- break;
- }
- }
- VkDeviceQueueCreateInfo queue_create_info {};
- queue_create_info.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
- queue_create_info.queueFamilyIndex = graphics_queue_family_index;
- queue_create_info.queueCount = 1;
- float const queue_priority = 1.0f;
- queue_create_info.pQueuePriorities = &queue_priority;
- VkPhysicalDeviceFeatures deviceFeatures {};
- VkDeviceCreateInfo create_device_info {};
- create_device_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
- create_device_info.pQueueCreateInfos = &queue_create_info;
- create_device_info.queueCreateInfoCount = 1;
- create_device_info.pEnabledFeatures = &deviceFeatures;
- if (vkCreateDevice(physical_device, &create_device_info, nullptr, &device) != VK_SUCCESS) {
- return Error::from_string_literal("Logical device creation failed");
- }
- return device;
- }
- ErrorOr<VulkanContext> create_vulkan_context()
- {
- uint32_t const api_version = VK_API_VERSION_1_0;
- auto* instance = TRY(create_instance(api_version));
- auto* physical_device = TRY(pick_physical_device(instance));
- auto* logical_device = TRY(create_logical_device(physical_device));
- VkQueue graphics_queue;
- vkGetDeviceQueue(logical_device, 0, 0, &graphics_queue);
- return VulkanContext {
- .api_version = api_version,
- .instance = instance,
- .physical_device = physical_device,
- .logical_device = logical_device,
- .graphics_queue = graphics_queue,
- };
- }
- }
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