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Vulkan.cpp
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Vulkan.cpp
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////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#define GLAD_VULKAN_IMPLEMENTATION
#include <vulkan.h>
// Include graphics because we use sf::Image for loading images
#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>
#include <algorithm>
#include <array>
#include <iostream>
#include <limits>
#include <string_view>
#include <vector>
#include <cmath>
#include <cstdint>
#include <cstring>
////////////////////////////////////////////////////////////
// Helper functions
////////////////////////////////////////////////////////////
namespace
{
using Vec3 = float[3];
using Matrix = float[4][4];
// Multiply 2 matrices
void matrixMultiply(Matrix& result, const Matrix& left, const Matrix& right)
{
Matrix temp;
for (int i = 0; i < 4; ++i)
{
for (int j = 0; j < 4; ++j)
temp[i][j] = left[0][j] * right[i][0] + left[1][j] * right[i][1] + left[2][j] * right[i][2] +
left[3][j] * right[i][3];
}
std::memcpy(result, temp, sizeof(Matrix));
}
// Rotate a matrix around the x-axis
void matrixRotateX(Matrix& result, sf::Angle angle)
{
const float rad = angle.asRadians();
// clang-format off
const Matrix matrix = {
{1.f, 0.f, 0.f, 0.f},
{0.f, std::cos(rad), std::sin(rad), 0.f},
{0.f, -std::sin(rad), std::cos(rad), 0.f},
{0.f, 0.f, 0.f, 1.f}
};
// clang-format on
matrixMultiply(result, result, matrix);
}
// Rotate a matrix around the y-axis
void matrixRotateY(Matrix& result, sf::Angle angle)
{
const float rad = angle.asRadians();
// clang-format off
const Matrix matrix = {
{ std::cos(rad), 0.f, std::sin(rad), 0.f},
{ 0.f, 1.f, 0.f, 0.f},
{-std::sin(rad), 0.f, std::cos(rad), 0.f},
{ 0.f, 0.f, 0.f, 1.f}
};
// clang-format on
matrixMultiply(result, result, matrix);
}
// Rotate a matrix around the z-axis
void matrixRotateZ(Matrix& result, sf::Angle angle)
{
const float rad = angle.asRadians();
// clang-format off
const Matrix matrix = {
{ std::cos(rad), std::sin(rad), 0.f, 0.f},
{-std::sin(rad), std::cos(rad), 0.f, 0.f},
{ 0.f, 0.f, 1.f, 0.f},
{ 0.f, 0.f, 0.f, 1.f}
};
// clang-format on
matrixMultiply(result, result, matrix);
}
// Construct a lookat view matrix
void matrixLookAt(Matrix& result, const Vec3& eye, const Vec3& center, const Vec3& up)
{
// Forward-looking vector
// clang-format off
Vec3 forward = {
center[0] - eye[0],
center[1] - eye[1],
center[2] - eye[2]
};
// clang-format on
// Normalize
float factor = 1.0f / std::sqrt(forward[0] * forward[0] + forward[1] * forward[1] + forward[2] * forward[2]);
for (float& f : forward)
f *= factor;
// Side vector (Forward cross product Up)
// clang-format off
Vec3 side = {
forward[1] * up[2] - forward[2] * up[1],
forward[2] * up[0] - forward[0] * up[2],
forward[0] * up[1] - forward[1] * up[0]
};
// clang-format on
// Normalize
factor = 1.0f / std::sqrt(side[0] * side[0] + side[1] * side[1] + side[2] * side[2]);
for (float& f : side)
f *= factor;
result[0][0] = side[0];
result[0][1] = side[1] * forward[2] - side[2] * forward[1];
result[0][2] = -forward[0];
result[0][3] = 0.f;
result[1][0] = side[1];
result[1][1] = side[2] * forward[0] - side[0] * forward[2];
result[1][2] = -forward[1];
result[1][3] = 0.f;
result[2][0] = side[2];
result[2][1] = side[0] * forward[1] - side[1] * forward[0];
result[2][2] = -forward[2];
result[2][3] = 0.f;
result[3][0] = (-eye[0]) * result[0][0] + (-eye[1]) * result[1][0] + (-eye[2]) * result[2][0];
result[3][1] = (-eye[0]) * result[0][1] + (-eye[1]) * result[1][1] + (-eye[2]) * result[2][1];
result[3][2] = (-eye[0]) * result[0][2] + (-eye[1]) * result[1][2] + (-eye[2]) * result[2][2];
result[3][3] = (-eye[0]) * result[0][3] + (-eye[1]) * result[1][3] + (-eye[2]) * result[2][3] + 1.0f;
}
// Construct a perspective projection matrix
void matrixPerspective(Matrix& result, sf::Angle fov, float aspect, float nearPlane, float farPlane)
{
const float a = 1.f / std::tan(fov.asRadians() / 2.f);
result[0][0] = a / aspect;
result[0][1] = 0.f;
result[0][2] = 0.f;
result[0][3] = 0.f;
result[1][0] = 0.f;
result[1][1] = -a;
result[1][2] = 0.f;
result[1][3] = 0.f;
result[2][0] = 0.f;
result[2][1] = 0.f;
result[2][2] = -((farPlane + nearPlane) / (farPlane - nearPlane));
result[2][3] = -1.f;
result[3][0] = 0.f;
result[3][1] = 0.f;
result[3][2] = -((2.f * farPlane * nearPlane) / (farPlane - nearPlane));
result[3][3] = 0.f;
}
// Helper function we pass to GLAD to load Vulkan functions via SFML
GLADapiproc getVulkanFunction(const char* name)
{
return sf::Vulkan::getFunction(name);
}
// Debug we pass to Vulkan to call when it detects warnings or errors
VKAPI_ATTR VkBool32 VKAPI_CALL debugCallback(
VkDebugReportFlagsEXT,
VkDebugReportObjectTypeEXT,
std::uint64_t,
std::size_t,
std::int32_t,
const char*,
const char* pMessage,
void*)
{
std::cerr << pMessage << std::endl;
return VK_FALSE;
}
} // namespace
////////////////////////////////////////////////////////////
// VulkanExample class
////////////////////////////////////////////////////////////
class VulkanExample
{
public:
// Constructor
VulkanExample()
{
// Vulkan setup procedure
if (vulkanAvailable)
setupInstance();
if (vulkanAvailable)
setupDebugReportCallback();
if (vulkanAvailable)
setupSurface();
if (vulkanAvailable)
setupPhysicalDevice();
if (vulkanAvailable)
setupLogicalDevice();
if (vulkanAvailable)
setupSwapchain();
if (vulkanAvailable)
setupSwapchainImages();
if (vulkanAvailable)
setupShaders();
if (vulkanAvailable)
setupRenderpass();
if (vulkanAvailable)
setupDescriptorSetLayout();
if (vulkanAvailable)
setupPipelineLayout();
if (vulkanAvailable)
setupPipeline();
if (vulkanAvailable)
setupCommandPool();
if (vulkanAvailable)
setupVertexBuffer();
if (vulkanAvailable)
setupIndexBuffer();
if (vulkanAvailable)
setupUniformBuffers();
if (vulkanAvailable)
setupDepthImage();
if (vulkanAvailable)
setupDepthImageView();
if (vulkanAvailable)
setupTextureImage();
if (vulkanAvailable)
setupTextureImageView();
if (vulkanAvailable)
setupTextureSampler();
if (vulkanAvailable)
setupFramebuffers();
if (vulkanAvailable)
setupDescriptorPool();
if (vulkanAvailable)
setupDescriptorSets();
if (vulkanAvailable)
setupCommandBuffers();
if (vulkanAvailable)
setupDraw();
if (vulkanAvailable)
setupSemaphores();
if (vulkanAvailable)
setupFences();
// If something went wrong, notify the user by setting the window title
if (!vulkanAvailable)
window.setTitle("SFML window with Vulkan (Vulkan not available)");
}
// Destructor
~VulkanExample()
{
// Wait until there are no pending frames
if (device)
vkDeviceWaitIdle(device);
// Teardown swapchain
cleanupSwapchain();
// Vulkan teardown procedure
for (VkFence fence : fences)
vkDestroyFence(device, fence, nullptr);
for (VkSemaphore renderFinishedSemaphore : renderFinishedSemaphores)
vkDestroySemaphore(device, renderFinishedSemaphore, nullptr);
for (VkSemaphore imageAvailableSemaphore : imageAvailableSemaphores)
vkDestroySemaphore(device, imageAvailableSemaphore, nullptr);
if (descriptorPool)
vkDestroyDescriptorPool(device, descriptorPool, nullptr);
for (VkDeviceMemory i : uniformBuffersMemory)
vkFreeMemory(device, i, nullptr);
for (VkBuffer uniformBuffer : uniformBuffers)
vkDestroyBuffer(device, uniformBuffer, nullptr);
if (textureSampler)
vkDestroySampler(device, textureSampler, nullptr);
if (textureImageView)
vkDestroyImageView(device, textureImageView, nullptr);
if (textureImageMemory)
vkFreeMemory(device, textureImageMemory, nullptr);
if (textureImage)
vkDestroyImage(device, textureImage, nullptr);
if (indexBufferMemory)
vkFreeMemory(device, indexBufferMemory, nullptr);
if (indexBuffer)
vkDestroyBuffer(device, indexBuffer, nullptr);
if (vertexBufferMemory)
vkFreeMemory(device, vertexBufferMemory, nullptr);
if (vertexBuffer)
vkDestroyBuffer(device, vertexBuffer, nullptr);
if (commandPool)
vkDestroyCommandPool(device, commandPool, nullptr);
if (descriptorSetLayout)
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
if (fragmentShaderModule)
vkDestroyShaderModule(device, fragmentShaderModule, nullptr);
if (vertexShaderModule)
vkDestroyShaderModule(device, vertexShaderModule, nullptr);
if (device)
vkDestroyDevice(device, nullptr);
if (surface)
vkDestroySurfaceKHR(instance, surface, nullptr);
if (debugReportCallback)
vkDestroyDebugReportCallbackEXT(instance, debugReportCallback, nullptr);
if (instance)
vkDestroyInstance(instance, nullptr);
}
// Cleanup swapchain
void cleanupSwapchain()
{
// Swapchain teardown procedure
for (VkFence fence : fences)
vkWaitForFences(device, 1, &fence, VK_TRUE, std::numeric_limits<std::uint64_t>::max());
if (!commandBuffers.empty())
vkFreeCommandBuffers(device, commandPool, static_cast<std::uint32_t>(commandBuffers.size()), commandBuffers.data());
commandBuffers.clear();
for (VkFramebuffer swapchainFramebuffer : swapchainFramebuffers)
vkDestroyFramebuffer(device, swapchainFramebuffer, nullptr);
swapchainFramebuffers.clear();
if (graphicsPipeline)
vkDestroyPipeline(device, graphicsPipeline, nullptr);
if (renderPass)
vkDestroyRenderPass(device, renderPass, nullptr);
if (pipelineLayout)
vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
if (depthImageView)
vkDestroyImageView(device, depthImageView, nullptr);
if (depthImageMemory)
vkFreeMemory(device, depthImageMemory, nullptr);
if (depthImage)
vkDestroyImage(device, depthImage, nullptr);
for (VkImageView swapchainImageView : swapchainImageViews)
vkDestroyImageView(device, swapchainImageView, nullptr);
swapchainImageViews.clear();
if (swapchain)
vkDestroySwapchainKHR(device, swapchain, nullptr);
}
// Cleanup and recreate swapchain
void recreateSwapchain()
{
// Wait until there are no pending frames
vkDeviceWaitIdle(device);
// Cleanup swapchain
cleanupSwapchain();
// Swapchain setup procedure
if (vulkanAvailable)
setupSwapchain();
if (vulkanAvailable)
setupSwapchainImages();
if (vulkanAvailable)
setupPipelineLayout();
if (vulkanAvailable)
setupRenderpass();
if (vulkanAvailable)
setupPipeline();
if (vulkanAvailable)
setupDepthImage();
if (vulkanAvailable)
setupDepthImageView();
if (vulkanAvailable)
setupFramebuffers();
if (vulkanAvailable)
setupCommandBuffers();
if (vulkanAvailable)
setupDraw();
}
// Setup Vulkan instance
void setupInstance()
{
// Load bootstrap entry points
gladLoadVulkan({}, getVulkanFunction);
if (!vkCreateInstance)
{
vulkanAvailable = false;
return;
}
// Retrieve the available instance layers
std::uint32_t objectCount = 0;
std::vector<VkLayerProperties> layers;
if (vkEnumerateInstanceLayerProperties(&objectCount, nullptr) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
layers.resize(objectCount);
if (vkEnumerateInstanceLayerProperties(&objectCount, layers.data()) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
// Activate the layers we are interested in
std::vector<const char*> validationLayers;
for (VkLayerProperties& layer : layers)
{
// VK_LAYER_LUNARG_standard_validation, meta-layer for the following layers:
// -- VK_LAYER_GOOGLE_threading
// -- VK_LAYER_LUNARG_parameter_validation
// -- VK_LAYER_LUNARG_device_limits
// -- VK_LAYER_LUNARG_object_tracker
// -- VK_LAYER_LUNARG_image
// -- VK_LAYER_LUNARG_core_validation
// -- VK_LAYER_LUNARG_swapchain
// -- VK_LAYER_GOOGLE_unique_objects
// These layers perform error checking and warn about bad or sub-optimal Vulkan API usage
// VK_LAYER_LUNARG_monitor appends an FPS counter to the window title
if (std::string_view(layer.layerName) == "VK_LAYER_LUNARG_standard_validation")
{
validationLayers.push_back("VK_LAYER_LUNARG_standard_validation");
}
else if (std::string_view(layer.layerName) == "VK_LAYER_LUNARG_monitor")
{
validationLayers.push_back("VK_LAYER_LUNARG_monitor");
}
}
// Retrieve the extensions we need to enable in order to use Vulkan with SFML
std::vector<const char*> requiredExtensions = sf::Vulkan::getGraphicsRequiredInstanceExtensions();
requiredExtensions.push_back(VK_EXT_DEBUG_REPORT_EXTENSION_NAME);
// Register our application information
VkApplicationInfo applicationInfo = VkApplicationInfo();
applicationInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
applicationInfo.pApplicationName = "SFML Vulkan Test";
applicationInfo.applicationVersion = VK_MAKE_VERSION(1, 0, 0);
applicationInfo.pEngineName = "SFML Vulkan Test Engine";
applicationInfo.engineVersion = VK_MAKE_VERSION(1, 0, 0);
applicationInfo.apiVersion = VK_API_VERSION_1_0;
VkInstanceCreateInfo instanceCreateInfo = VkInstanceCreateInfo();
instanceCreateInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
instanceCreateInfo.pApplicationInfo = &applicationInfo;
instanceCreateInfo.enabledLayerCount = static_cast<std::uint32_t>(validationLayers.size());
instanceCreateInfo.ppEnabledLayerNames = validationLayers.data();
instanceCreateInfo.enabledExtensionCount = static_cast<std::uint32_t>(requiredExtensions.size());
instanceCreateInfo.ppEnabledExtensionNames = requiredExtensions.data();
// Try to create a Vulkan instance with debug report enabled
VkResult result = vkCreateInstance(&instanceCreateInfo, nullptr, &instance);
// If an extension is missing, try disabling debug report
if (result == VK_ERROR_EXTENSION_NOT_PRESENT)
{
requiredExtensions.pop_back();
instanceCreateInfo.enabledExtensionCount = static_cast<std::uint32_t>(requiredExtensions.size());
instanceCreateInfo.ppEnabledExtensionNames = requiredExtensions.data();
result = vkCreateInstance(&instanceCreateInfo, nullptr, &instance);
}
// If instance creation still fails, give up
if (result != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
// Load instance entry points
gladLoadVulkan({}, getVulkanFunction);
}
// Setup our debug callback function to be called by Vulkan
void setupDebugReportCallback()
{
// Don't try to register the callback if the extension is not available
if (!vkCreateDebugReportCallbackEXT)
return;
// Register for warnings and errors
VkDebugReportCallbackCreateInfoEXT debugReportCallbackCreateInfo = VkDebugReportCallbackCreateInfoEXT();
debugReportCallbackCreateInfo.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT;
debugReportCallbackCreateInfo.flags = VK_DEBUG_REPORT_WARNING_BIT_EXT |
VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT | VK_DEBUG_REPORT_ERROR_BIT_EXT;
debugReportCallbackCreateInfo.pfnCallback = debugCallback;
// Create the debug callback
if (vkCreateDebugReportCallbackEXT(instance, &debugReportCallbackCreateInfo, nullptr, &debugReportCallback) !=
VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
}
// Setup the SFML window Vulkan rendering surface
void setupSurface()
{
if (!window.createVulkanSurface(instance, surface))
vulkanAvailable = false;
}
// Select a GPU to use and query its capabilities
void setupPhysicalDevice()
{
// Last sanity check
if (!vkEnumeratePhysicalDevices || !vkCreateDevice || !vkGetPhysicalDeviceProperties)
{
vulkanAvailable = false;
return;
}
// Retrieve list of GPUs
std::uint32_t objectCount = 0;
std::vector<VkPhysicalDevice> devices;
if (vkEnumeratePhysicalDevices(instance, &objectCount, nullptr) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
devices.resize(objectCount);
if (vkEnumeratePhysicalDevices(instance, &objectCount, devices.data()) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
// Look for a GPU that supports swapchains
for (VkPhysicalDevice dev : devices)
{
VkPhysicalDeviceProperties deviceProperties;
vkGetPhysicalDeviceProperties(dev, &deviceProperties);
std::vector<VkExtensionProperties> extensions;
if (vkEnumerateDeviceExtensionProperties(dev, nullptr, &objectCount, nullptr) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
extensions.resize(objectCount);
if (vkEnumerateDeviceExtensionProperties(dev, nullptr, &objectCount, extensions.data()) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
bool supportsSwapchain = false;
for (VkExtensionProperties& extension : extensions)
{
if (std::string_view(extension.extensionName) == VK_KHR_SWAPCHAIN_EXTENSION_NAME)
{
supportsSwapchain = true;
break;
}
}
if (!supportsSwapchain)
continue;
// Prefer discrete over integrated GPUs if multiple are available
if (deviceProperties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
{
gpu = dev;
break;
}
else if (deviceProperties.deviceType == VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU)
{
gpu = dev;
}
}
if (!gpu)
{
vulkanAvailable = false;
return;
}
// Load physical device entry points
gladLoadVulkan(gpu, getVulkanFunction);
// Check what depth formats are available and select one
VkFormatProperties formatProperties = VkFormatProperties();
vkGetPhysicalDeviceFormatProperties(gpu, VK_FORMAT_D24_UNORM_S8_UINT, &formatProperties);
if (formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT)
{
depthFormat = VK_FORMAT_D24_UNORM_S8_UINT;
}
else
{
vkGetPhysicalDeviceFormatProperties(gpu, VK_FORMAT_D32_SFLOAT_S8_UINT, &formatProperties);
if (formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT)
{
depthFormat = VK_FORMAT_D32_SFLOAT_S8_UINT;
}
else
{
vkGetPhysicalDeviceFormatProperties(gpu, VK_FORMAT_D32_SFLOAT, &formatProperties);
if (formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT)
{
depthFormat = VK_FORMAT_D32_SFLOAT;
}
else
{
vulkanAvailable = false;
return;
}
}
}
}
// Setup logical device and device queue
void setupLogicalDevice()
{
// Select a queue family that supports graphics operations and surface presentation
std::uint32_t objectCount = 0;
std::vector<VkQueueFamilyProperties> queueFamilyProperties;
vkGetPhysicalDeviceQueueFamilyProperties(gpu, &objectCount, nullptr);
queueFamilyProperties.resize(objectCount);
vkGetPhysicalDeviceQueueFamilyProperties(gpu, &objectCount, queueFamilyProperties.data());
for (std::size_t i = 0; i < queueFamilyProperties.size(); ++i)
{
VkBool32 surfaceSupported = VK_FALSE;
vkGetPhysicalDeviceSurfaceSupportKHR(gpu, static_cast<std::uint32_t>(i), surface, &surfaceSupported);
if ((queueFamilyProperties[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) && (surfaceSupported == VK_TRUE))
{
queueFamilyIndex = static_cast<int>(i);
break;
}
}
if (queueFamilyIndex < 0)
{
vulkanAvailable = false;
return;
}
const float queuePriority = 1.0f;
VkDeviceQueueCreateInfo deviceQueueCreateInfo = VkDeviceQueueCreateInfo();
deviceQueueCreateInfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
deviceQueueCreateInfo.queueCount = 1;
deviceQueueCreateInfo.queueFamilyIndex = static_cast<std::uint32_t>(queueFamilyIndex);
deviceQueueCreateInfo.pQueuePriorities = &queuePriority;
// Enable the swapchain extension
const char* extensions[1] = {VK_KHR_SWAPCHAIN_EXTENSION_NAME};
// Enable anisotropic filtering
VkPhysicalDeviceFeatures physicalDeviceFeatures = VkPhysicalDeviceFeatures();
physicalDeviceFeatures.samplerAnisotropy = VK_TRUE;
VkDeviceCreateInfo deviceCreateInfo = VkDeviceCreateInfo();
deviceCreateInfo.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
deviceCreateInfo.enabledExtensionCount = 1;
deviceCreateInfo.ppEnabledExtensionNames = extensions;
deviceCreateInfo.queueCreateInfoCount = 1;
deviceCreateInfo.pQueueCreateInfos = &deviceQueueCreateInfo;
deviceCreateInfo.pEnabledFeatures = &physicalDeviceFeatures;
// Create our logical device
if (vkCreateDevice(gpu, &deviceCreateInfo, nullptr, &device) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
// Retrieve a handle to the logical device command queue
vkGetDeviceQueue(device, static_cast<std::uint32_t>(queueFamilyIndex), 0, &queue);
}
// Query surface formats and set up swapchain
void setupSwapchain()
{
// Select a surface format that supports RGBA color format
std::uint32_t objectCount = 0;
std::vector<VkSurfaceFormatKHR> surfaceFormats;
if (vkGetPhysicalDeviceSurfaceFormatsKHR(gpu, surface, &objectCount, nullptr) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
surfaceFormats.resize(objectCount);
if (vkGetPhysicalDeviceSurfaceFormatsKHR(gpu, surface, &objectCount, surfaceFormats.data()) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
if ((surfaceFormats.size() == 1) && (surfaceFormats[0].format == VK_FORMAT_UNDEFINED))
{
swapchainFormat.format = VK_FORMAT_B8G8R8A8_UNORM;
swapchainFormat.colorSpace = VK_COLOR_SPACE_SRGB_NONLINEAR_KHR;
}
else if (!surfaceFormats.empty())
{
for (const VkSurfaceFormatKHR& surfaceFormat : surfaceFormats)
{
if ((surfaceFormat.format == VK_FORMAT_B8G8R8A8_UNORM) &&
(surfaceFormat.colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR))
{
swapchainFormat.format = VK_FORMAT_B8G8R8A8_UNORM;
swapchainFormat.colorSpace = VK_COLOR_SPACE_SRGB_NONLINEAR_KHR;
break;
}
}
if (swapchainFormat.format == VK_FORMAT_UNDEFINED)
swapchainFormat = surfaceFormats[0];
}
else
{
vulkanAvailable = false;
return;
}
// Select a swapchain present mode
std::vector<VkPresentModeKHR> presentModes;
if (vkGetPhysicalDeviceSurfacePresentModesKHR(gpu, surface, &objectCount, nullptr) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
presentModes.resize(objectCount);
if (vkGetPhysicalDeviceSurfacePresentModesKHR(gpu, surface, &objectCount, presentModes.data()) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
// Prefer mailbox over FIFO if it is available
VkPresentModeKHR presentMode = VK_PRESENT_MODE_FIFO_KHR;
for (const VkPresentModeKHR& i : presentModes)
{
if (i == VK_PRESENT_MODE_MAILBOX_KHR)
{
presentMode = i;
break;
}
}
// Determine size and count of swapchain images
VkSurfaceCapabilitiesKHR surfaceCapabilities;
if (vkGetPhysicalDeviceSurfaceCapabilitiesKHR(gpu, surface, &surfaceCapabilities) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
swapchainExtent.width = std::clamp(window.getSize().x,
surfaceCapabilities.minImageExtent.width,
surfaceCapabilities.maxImageExtent.width);
swapchainExtent.height = std::clamp(window.getSize().y,
surfaceCapabilities.minImageExtent.height,
surfaceCapabilities.maxImageExtent.height);
const auto imageCount = std::clamp(2u, surfaceCapabilities.minImageCount, surfaceCapabilities.maxImageCount);
VkSwapchainCreateInfoKHR swapchainCreateInfo = VkSwapchainCreateInfoKHR();
swapchainCreateInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
swapchainCreateInfo.surface = surface;
swapchainCreateInfo.minImageCount = imageCount;
swapchainCreateInfo.imageFormat = swapchainFormat.format;
swapchainCreateInfo.imageColorSpace = swapchainFormat.colorSpace;
swapchainCreateInfo.imageExtent = swapchainExtent;
swapchainCreateInfo.imageArrayLayers = 1;
swapchainCreateInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
swapchainCreateInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
swapchainCreateInfo.preTransform = surfaceCapabilities.currentTransform;
swapchainCreateInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
swapchainCreateInfo.presentMode = presentMode;
swapchainCreateInfo.clipped = VK_TRUE;
swapchainCreateInfo.oldSwapchain = VK_NULL_HANDLE;
// Create the swapchain
if (vkCreateSwapchainKHR(device, &swapchainCreateInfo, nullptr, &swapchain) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
}
// Retrieve the swapchain images and create image views for them
void setupSwapchainImages()
{
// Retrieve swapchain images
std::uint32_t objectCount = 0;
if (vkGetSwapchainImagesKHR(device, swapchain, &objectCount, nullptr) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
swapchainImages.resize(objectCount);
swapchainImageViews.resize(objectCount);
if (vkGetSwapchainImagesKHR(device, swapchain, &objectCount, swapchainImages.data()) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
VkImageViewCreateInfo imageViewCreateInfo = VkImageViewCreateInfo();
imageViewCreateInfo.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
imageViewCreateInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
imageViewCreateInfo.format = swapchainFormat.format;
imageViewCreateInfo.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
imageViewCreateInfo.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
imageViewCreateInfo.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
imageViewCreateInfo.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
imageViewCreateInfo.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
imageViewCreateInfo.subresourceRange.baseMipLevel = 0;
imageViewCreateInfo.subresourceRange.levelCount = 1;
imageViewCreateInfo.subresourceRange.baseArrayLayer = 0;
imageViewCreateInfo.subresourceRange.layerCount = 1;
// Create an image view for each swapchain image
for (std::size_t i = 0; i < swapchainImages.size(); ++i)
{
imageViewCreateInfo.image = swapchainImages[i];
if (vkCreateImageView(device, &imageViewCreateInfo, nullptr, &swapchainImageViews[i]) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
}
}
// Load vertex and fragment shader modules
void setupShaders()
{
VkShaderModuleCreateInfo shaderModuleCreateInfo = VkShaderModuleCreateInfo();
shaderModuleCreateInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
// Use the vertex shader SPIR-V code to create a vertex shader module
{
sf::FileInputStream file;
if (!file.open("resources/shader.vert.spv"))
{
vulkanAvailable = false;
return;
}
std::vector<std::uint32_t> buffer(static_cast<std::size_t>(file.getSize()) / sizeof(std::uint32_t));
if (file.read(buffer.data(), file.getSize()) != file.getSize())
{
vulkanAvailable = false;
return;
}
shaderModuleCreateInfo.codeSize = buffer.size() * sizeof(std::uint32_t);
shaderModuleCreateInfo.pCode = buffer.data();
if (vkCreateShaderModule(device, &shaderModuleCreateInfo, nullptr, &vertexShaderModule) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
}
// Use the fragment shader SPIR-V code to create a fragment shader module
{
sf::FileInputStream file;
if (!file.open("resources/shader.frag.spv"))
{
vulkanAvailable = false;
return;
}
std::vector<std::uint32_t> buffer(static_cast<std::size_t>(file.getSize()) / sizeof(std::uint32_t));
if (file.read(buffer.data(), file.getSize()) != file.getSize())
{
vulkanAvailable = false;
return;
}
shaderModuleCreateInfo.codeSize = buffer.size() * sizeof(std::uint32_t);
shaderModuleCreateInfo.pCode = buffer.data();
if (vkCreateShaderModule(device, &shaderModuleCreateInfo, nullptr, &fragmentShaderModule) != VK_SUCCESS)
{
vulkanAvailable = false;
return;
}
}
// Prepare the shader stage information for later pipeline creation
shaderStages[0] = VkPipelineShaderStageCreateInfo();
shaderStages[0].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
shaderStages[0].stage = VK_SHADER_STAGE_VERTEX_BIT;
shaderStages[0].module = vertexShaderModule;
shaderStages[0].pName = "main";
shaderStages[1] = VkPipelineShaderStageCreateInfo();
shaderStages[1].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
shaderStages[1].stage = VK_SHADER_STAGE_FRAGMENT_BIT;
shaderStages[1].module = fragmentShaderModule;
shaderStages[1].pName = "main";
}
// Setup renderpass and its subpass dependencies
void setupRenderpass()
{
VkAttachmentDescription attachmentDescriptions[2];
// Color attachment
attachmentDescriptions[0] = VkAttachmentDescription();