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#include <deimos/core/api_registry.h>
#include <deimos/core/log.h>
#include <deimos/core/temp_allocator.h>
#include <deimos/core/status.h>
#include <deimos/vulkan/vulkan.h>
using namespace deimos;
static LogApi* log_api;
static TempAllocatorApi* temp_api;
static const VkAllocationCallbacks* kVkAlloc = nullptr;
[[nodiscard]]
StatusOr<VkInstance> CreateInstance(VulkanApi* vk)
{
const VkApplicationInfo application_info{
.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO,
.pNext = nullptr,
.pApplicationName = "Deimos game",
.applicationVersion = 0,
.pEngineName = "Deimos engine",
.engineVersion = 0,
.apiVersion = VK_API_VERSION_1_3,
};
const char* extensions[]{
"VK_KHR_surface",
"VK_KHR_win32_surface",
};
// @Todo Select layers & extensions based on config
const char* layers[]{
"VK_LAYER_KHRONOS_validation",
"VK_LAYER_LUNARG_monitor",
};
const VkInstanceCreateInfo create_info{
.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
.pNext = nullptr,
.flags = 0,
.pApplicationInfo = &application_info,
.enabledLayerCount = (uint32_t)ArraySize(layers),
.ppEnabledLayerNames = layers,
.enabledExtensionCount = (uint32_t)ArraySize(extensions),
.ppEnabledExtensionNames = extensions,
};
VkInstance instance{};
const VkResult res = vk->CreateInstance(&create_info, kVkAlloc, &instance);
if (res != VK_SUCCESS)
{
return InternalError("vkCreateInstance failed");
}
return instance;
}
StatusOr<VkPhysicalDevice> FindPhysicalDevice(VulkanApi* vk, VkInstance instance)
{
auto temp_alloc = temp_api->Acquire();
uint32_t physical_device_count = 0;
vk->EnumeratePhysicalDevices(instance, &physical_device_count, nullptr);
if (physical_device_count == 0)
{
return InternalError("No Vulkan device found");
}
log_api->LogInfo("Found $ physical devices", physical_device_count);
auto devices = temp_alloc.allocator().NewArray<VkPhysicalDevice>(physical_device_count);
vk->EnumeratePhysicalDevices(instance, &physical_device_count, devices.data());
// @Todo Physical device selection
return devices[0];
}
StatusOr<uint32_t> FindQueueFamily(VulkanApi* vk, VkPhysicalDevice device)
{
auto temp_alloc = temp_api->Acquire();
uint32_t queue_family_count = 0;
vk->GetPhysicalDeviceQueueFamilyProperties(device, &queue_family_count, nullptr);
if (queue_family_count == 0)
{
return InternalError("No queue on this physical device??");
}
log_api->LogInfo("Physical device has $ queue families", queue_family_count);
auto queue_families = temp_alloc.allocator().NewArray<VkQueueFamilyProperties>(queue_family_count);
vk->GetPhysicalDeviceQueueFamilyProperties(device, &queue_family_count, queue_families.data());
for (uint32_t index = 0; index < queue_family_count; ++index)
{
const auto& prps = queue_families[index];
if ((prps.queueFlags & VK_QUEUE_GRAPHICS_BIT) != 0 && (prps.queueFlags & VK_QUEUE_COMPUTE_BIT) != 0)
{
return index;
}
}
return InternalError("Couldn't find a suitable queue");
}
Status InitializeVulkan(ApiRegistry* api_registry)
{
RegisterVulkanLoaderApi(api_registry);
auto* loader_api = api_registry->Get<VulkanLoaderApi>();
auto* vk = loader_api->LoadEntry();
VkInstance instance{};
{
StatusOr<VkInstance> s = CreateInstance(vk);
if (!s.ok()) { return s.status(); }
instance = s.value();
log_api->LogInfo("Vulkan instance created");
}
loader_api->LoadInstance(vk, instance);
VkPhysicalDevice physical_device{};
{
StatusOr<VkPhysicalDevice> s = FindPhysicalDevice(vk, instance);
if (!s.ok()) { return s.status(); }
physical_device = s.value();
}
{
VkPhysicalDeviceVulkan12Properties prps12{};
prps12.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_PROPERTIES;
prps12.pNext = nullptr;
VkPhysicalDeviceProperties2 prps{};
prps.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2;
prps.pNext = &prps12;
vk->GetPhysicalDeviceProperties2(physical_device, &prps);
log_api->LogInfo("Vulkan device: $", prps.properties.deviceName);
log_api->LogInfo("Vulkan driver: $, $", prps12.driverName, prps12.driverInfo);
}
uint32_t queue_family = 0;
{
StatusOr<uint32_t> s = FindQueueFamily(vk, physical_device);
if (!s.ok()) { return s.status(); }
queue_family = s.value();
}
log_api->LogInfo("Vulkan queue family: $", queue_family);
vk->DestroyInstance(instance, kVkAlloc);
return {};
}
int main(int /* argc */, char* /* argv */[])
{
auto* api_registry = InitializeGlobalApiRegistry();
log_api = api_registry->Get<LogApi>();
temp_api = api_registry->Get<TempAllocatorApi>();
log_api->LogInfo("Base APIs registered");
const Status s = InitializeVulkan(api_registry);
if (!s.ok())
{
log_api->LogError("Vulkan initializaiton error: $", s);
}
log_api->LogInfo("OK");
return 0;
}
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