333 lines
16 KiB
C++
333 lines
16 KiB
C++
#include "devicelibrary.h"
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#include <vulkan/vulkan_core.h>
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namespace device_libs {
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VkPhysicalDeviceProperties deviceProperties;
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std::vector<VkImage> swapChainImages;
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VkFormat swapChainImageFormat;
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VkExtent2D swapChainExtent;
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struct SwapChainSupportDetails {
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VkSurfaceCapabilitiesKHR capabilities;
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std::vector<VkSurfaceFormatKHR> formats;
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std::vector<VkPresentModeKHR> presentModes;
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};
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const std::vector<const char*> deviceExtensions = {
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VK_KHR_SWAPCHAIN_EXTENSION_NAME
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};
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SwapChainSupportDetails querySwapChainSupport(VkPhysicalDevice device) {
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/* Swap chains are weird ngl, it's another one of those Vulkan platform agnosticity.
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The swapchain is basically a wrapper for GDI+, DXGI, X11, Wayland, etc.
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It lets us use the swap chain rather than create a different framebuffer
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handler for every targeted platform. Swap chains handle the ownership
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of buffers before sending them to the presentation engine. (still no
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fucking clue how it works though) */
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SwapChainSupportDetails details;
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vkGetPhysicalDeviceSurfaceCapabilitiesKHR(device, Global::surface, &details.capabilities);
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uint32_t formatCount;
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vkGetPhysicalDeviceSurfaceFormatsKHR(device, Global::surface, &formatCount, nullptr);
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if(formatCount != 0) {
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details.formats.resize(formatCount);
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vkGetPhysicalDeviceSurfaceFormatsKHR(device, Global::surface, &formatCount, details.formats.data());
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}
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uint32_t presentModeCount;
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vkGetPhysicalDeviceSurfacePresentModesKHR(device, Global::surface, &presentModeCount, details.presentModes.data());
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if(presentModeCount != 0) {
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details.presentModes.resize(presentModeCount);
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vkGetPhysicalDeviceSurfacePresentModesKHR(device, Global::surface, &presentModeCount, details.presentModes.data());
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}
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return details;
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}
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bool checkDeviceExtensionSupport(VkPhysicalDevice device) {
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uint32_t extensionCount;
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vkEnumerateDeviceExtensionProperties(device, nullptr, &extensionCount, nullptr);
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std::vector<VkExtensionProperties> availableExtensions(extensionCount);
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vkEnumerateDeviceExtensionProperties(device, nullptr, &extensionCount, availableExtensions.data());
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std::set<std::string> requiredExtensions(deviceExtensions.begin(), deviceExtensions.end());
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for (const auto& extension : availableExtensions) {
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requiredExtensions.erase(extension.extensionName);
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}
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return requiredExtensions.empty();
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}
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bool isDeviceSuitable(VkPhysicalDevice device) {
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// These two are simple, create a structure to hold the apiVersion, driverVersion, vendorID, deviceID and type, name, and a few other settings.
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// Then populate it by passing in the device and the structure reference.
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vkGetPhysicalDeviceProperties(device, &deviceProperties);
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// Similarly, we can pass in the device and a deviceFeatures struct, this is quite special, it holds a struct of optional features the GPU can perform.
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// Some, like a geometry shader, and stereoscopic rendering (multiViewport) we want, so we dont return true without them.
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VkPhysicalDeviceFeatures supportedFeatures;
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vkGetPhysicalDeviceFeatures(device, &supportedFeatures);
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// We need to find a device that supports graphical operations, or else we cant do much with it! This function just runs over all the queueFamilies and sees if there
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// is a queue family with the VK_QUEUE_GRAPHICS_BIT flipped!
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Global::QueueFamilyIndices indices = Global::findQueueFamilies(device);
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bool extensionSupported = checkDeviceExtensionSupport(device);
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bool swapChainAdequate = false;
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if(extensionSupported) {
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SwapChainSupportDetails swapChainSupport = querySwapChainSupport(device);
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swapChainAdequate = !swapChainSupport.formats.empty() && !swapChainSupport.presentModes.empty();
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}
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return deviceProperties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU
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&& supportedFeatures.samplerAnisotropy
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&& indices.isComplete()
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&& extensionSupported
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&& swapChainAdequate;
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}
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// -------------------------------------- Swap Chain Settings ----------------------------------------- //
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VkSurfaceFormatKHR chooseSwapSurfaceFormat(const std::vector<VkSurfaceFormatKHR>& availableFormats) {
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// One of three settings we can set, Surface Format controls the color space and format.
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for (const auto& availableFormat : availableFormats) {
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if (availableFormat.format == VK_FORMAT_B8G8R8A8_SRGB && availableFormat.colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR) {
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// sRGB & 32bit BGRA
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return availableFormat;
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}
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}
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return availableFormats[0];
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}
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VkPresentModeKHR chooseSwapPresentMode(const std::vector<VkPresentModeKHR>& availablePresentModes) {
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// The second of the three settings, arguably the most important, the presentation mode! This dictates how images are displayed.
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// MAILBOX is basically equivalent to triple buffering, it avoids screen tearing with fairly low latency,
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// However, it is not always supported, so in the case that it isn't, currently we will default to FIFO,
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// This is most similarly to standard V-Sync.
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for(const auto& availablePresentMode : availablePresentModes) {
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if(availablePresentMode == VK_PRESENT_MODE_MAILBOX_KHR) {
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return availablePresentMode;
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}
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}
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return VK_PRESENT_MODE_FIFO_KHR;
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}
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VkExtent2D chooseSwapExtent(const VkSurfaceCapabilitiesKHR& capabilities, GLFWwindow* window) {
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// Swap Extent is just a fancy way of saying the resolution of the swap images to display.
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// This is almost always going to equal the resolution of the window in pixels.
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// The max int32 value tells us that the window manager lets us change the windth and height to what we wish!
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if (capabilities.currentExtent.width != std::numeric_limits<uint32_t>::max()) {
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return capabilities.currentExtent;
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} else {
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int width, height;
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glfwGetFramebufferSize(window, &width, &height);
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VkExtent2D actualExtent = {
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static_cast<uint32_t>(width),
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static_cast<uint32_t>(height)
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};
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// Clamp the image size to the minimum extent values specified by vulkan for our window manager.
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actualExtent.width = std::clamp(actualExtent.width, capabilities.minImageExtent.width, capabilities.maxImageExtent.width);
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actualExtent.height = std::clamp(actualExtent.height, capabilities.minImageExtent.height, capabilities.maxImageExtent.height);
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return actualExtent;
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}
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}
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// --------------------------------------- External Functions ----------------------------------------- //
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void DeviceControl::pickPhysicalDevice(VkInstance& instance) {
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uint32_t deviceCount = 0;
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vkEnumeratePhysicalDevices(instance, &deviceCount, nullptr);
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if(deviceCount == 0) {
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throw std::runtime_error("Failed to find GPU's with Vulkan Support!!");
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}
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std::vector<VkPhysicalDevice> devices(deviceCount); // Direct Initialization is weird af, yo
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vkEnumeratePhysicalDevices(instance, &deviceCount, devices.data());
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for(const auto& device : devices) {
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if(isDeviceSuitable(device)) {
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//Once we have buttons or such, maybe ask the user or write a config file for which GPU to use?
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Global::physicalDevice = device;
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break;
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}
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}
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if(Global::physicalDevice == VK_NULL_HANDLE) {
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throw std::runtime_error("Failed to find a suitable GPU!");
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}
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}
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void DeviceControl::destroySurface(VkInstance& instance) {
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vkDestroySurfaceKHR(instance, Global::surface, nullptr);
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}
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void DeviceControl::createSurface(VkInstance& instance, GLFWwindow* window) {
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if(glfwCreateWindowSurface(instance, window, nullptr, &Global::surface) != VK_SUCCESS) {
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throw std::runtime_error("Failed to create window surface!!");
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}
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}
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void DeviceControl::createLogicalDevice() {
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// Describe how many queues we want for a single family (1) here, right now we are solely interested in graphics capabilites,
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// but Compute Shaders, transfer ops, decode and encode operations can also queued with setup! We also assign each queue a priority.
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// We do this by looping over all the queueFamilies and sorting them by indices to fill the queue at the end!
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Global::QueueFamilyIndices indices = Global::findQueueFamilies(Global::physicalDevice);
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std::vector<VkDeviceQueueCreateInfo> queueCreateInfos;
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std::set<uint32_t> uniqueQueueFamilies = {
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indices.graphicsFamily.value(),
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indices.presentFamily.value()
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};
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float queuePriority = 1.0f;
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for(uint32_t queueFamily : uniqueQueueFamilies) {
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VkDeviceQueueCreateInfo queueCreateSingularInfo = {};
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queueCreateSingularInfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
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queueCreateSingularInfo.queueFamilyIndex = queueFamily;
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queueCreateSingularInfo.queueCount = 1;
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queueCreateSingularInfo.pQueuePriorities = &queuePriority;
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queueCreateInfos.push_back(queueCreateSingularInfo);
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}
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VkPhysicalDeviceVulkan13Features features13 {
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.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_3_FEATURES,
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.pNext = nullptr,
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.dynamicRendering = true,
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};
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VkPhysicalDeviceFeatures featuresBase {
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.samplerAnisotropy = true,
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};
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VkPhysicalDeviceFeatures2 deviceFeatures {
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.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2,
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.pNext = &features13,
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.features = featuresBase,
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};
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VkDeviceCreateInfo createDeviceInfo = {};
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createDeviceInfo.pNext = &deviceFeatures;
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createDeviceInfo.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
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createDeviceInfo.pQueueCreateInfos = queueCreateInfos.data();
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createDeviceInfo.queueCreateInfoCount = static_cast<uint32_t>(queueCreateInfos.size());
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createDeviceInfo.enabledExtensionCount = static_cast<uint32_t>(deviceExtensions.size());
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createDeviceInfo.ppEnabledExtensionNames = deviceExtensions.data();
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if(vkCreateDevice(Global::physicalDevice, &createDeviceInfo, nullptr, &Global::device) != VK_SUCCESS) {
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throw std::runtime_error("Failed to create logical device");
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}
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vkGetDeviceQueue(Global::device, indices.graphicsFamily.value(), 0, &Global::graphicsQueue);
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vkGetDeviceQueue(Global::device, indices.presentFamily.value(), 0, &Global::presentQueue);
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}
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void DeviceControl::createSwapChain(GLFWwindow* window) {
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SwapChainSupportDetails swapChainSupport = querySwapChainSupport(Global::physicalDevice);
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VkSurfaceFormatKHR surfaceFormat = chooseSwapSurfaceFormat(swapChainSupport.formats);
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VkPresentModeKHR presentMode = chooseSwapPresentMode(swapChainSupport.presentModes);
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VkExtent2D extent = chooseSwapExtent(swapChainSupport.capabilities, window);
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// Number of images to hold in the swap chain, 1 over the minimum guarantees we won't have to wait on the driver to complete
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// internal operations before acquiring another image. Absolutely a TODO to determine the best amount to queue.
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uint32_t imageCount = swapChainSupport.capabilities.minImageCount + 1;
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// Make sure not to queue more than the max! 0 indicates that there is no maximum.
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if (swapChainSupport.capabilities.maxImageCount > 0 && imageCount > swapChainSupport.capabilities.maxImageCount) {
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imageCount = swapChainSupport.capabilities.maxImageCount;
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}
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VkSwapchainCreateInfoKHR createSwapChainInfo{};
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createSwapChainInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
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createSwapChainInfo.surface = Global::surface;
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createSwapChainInfo.minImageCount = imageCount;
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createSwapChainInfo.imageFormat = surfaceFormat.format;
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createSwapChainInfo.imageColorSpace = surfaceFormat.colorSpace;
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createSwapChainInfo.imageExtent = extent;
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// Image array layers is always 1 unless we are developing for VR (Spoiler: we are, we will use a build flag.)
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// Image Usage specifies what operations you use the images for, COLOR_ATTACH means we render directly to them,
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// if you wanted to render to separate images for things like post processing, you can use TRANSFER_DST and use a
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// memory operation to transfer the image to a swap chain, this is also a TODO item eventually.
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createSwapChainInfo.imageArrayLayers = 1;
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createSwapChainInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
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// This handles swap chain images across multiple queue families, ie, if the graphics queue family is different from the present queue
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Global::QueueFamilyIndices indices = Global::findQueueFamilies(Global::physicalDevice);
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uint32_t queueFamilyIndices[] = {indices.graphicsFamily.value(), indices.presentFamily.value()};
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// Usage across multiple queue families without explicit transfer of ownership if they are different queue families.
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// Otherwise, no sharing without explicit handoffs, faster, but not easily supported with multiple families.
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// Presentation and Graphics families are usually merged on most hardware.
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if (indices.graphicsFamily != indices.presentFamily) {
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createSwapChainInfo.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
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createSwapChainInfo.queueFamilyIndexCount = 2;
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createSwapChainInfo.pQueueFamilyIndices = queueFamilyIndices;
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} else {
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createSwapChainInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
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}
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// Transformation of image support.
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createSwapChainInfo.preTransform = swapChainSupport.capabilities.currentTransform;
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// Do NOT blend with other windows on the system.
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createSwapChainInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
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createSwapChainInfo.presentMode = presentMode;
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// This is interesting, clip pixels that are obscured for performance, but that means you wont be able to read them reliably..
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// I am curious if this would affect screen-space rendering techniques, may be something to note.
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createSwapChainInfo.clipped = VK_TRUE;
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// This is something that needs to be implemented later, operations like resizing the window invalidate the swap chain and
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// require you to recreate it and reference the old one specified here, will revisit in a few days.
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//createSwapChainInfo.oldSwapchain = VK_NULL_HANDLE;
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if(vkCreateSwapchainKHR(Global::device, &createSwapChainInfo, nullptr, &Global::swapChain) != VK_SUCCESS) {
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throw std::runtime_error("Failed to create the swap chain!!");
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}
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vkGetSwapchainImagesKHR(Global::device, Global::swapChain, &imageCount, nullptr);
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swapChainImages.resize(imageCount);
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vkGetSwapchainImagesKHR(Global::device, Global::swapChain, &imageCount, swapChainImages.data());
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swapChainImageFormat = surfaceFormat.format;
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swapChainExtent = extent;
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}
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void DeviceControl::destroySwapChain() {
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vkDestroySwapchainKHR(Global::device, Global::swapChain, nullptr);
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}
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VkImageView DeviceControl::createImageView(VkImage image, VkFormat format, VkImageAspectFlags flags, uint32_t mipLevels) {
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// This defines the parameters of a newly created image object!
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VkImageViewCreateInfo viewInfo{};
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viewInfo.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
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viewInfo.image = image;
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viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
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viewInfo.format = format;
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viewInfo.subresourceRange.aspectMask = flags;
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viewInfo.subresourceRange.baseMipLevel = 0;
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viewInfo.subresourceRange.levelCount = 1;
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viewInfo.subresourceRange.baseArrayLayer = 0;
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viewInfo.subresourceRange.layerCount = 1;
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viewInfo.subresourceRange.levelCount = mipLevels;
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VkImageView imageView;
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if (vkCreateImageView(Global::device, &viewInfo, nullptr, &imageView) != VK_SUCCESS) {
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throw std::runtime_error("failed to create image view!");
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}
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return imageView;
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}
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void DeviceControl::createImageViews() {
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Global::swapChainImageViews.resize(swapChainImages.size());
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for (uint32_t i = 0; i < swapChainImages.size(); i++) {
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Global::swapChainImageViews[i] = createImageView(swapChainImages[i], swapChainImageFormat, VK_IMAGE_ASPECT_COLOR_BIT, 1);
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}
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}
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void DeviceControl::destroyImageViews() {
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for (auto imageView : Global::swapChainImageViews) {
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vkDestroyImageView(Global::device, imageView, nullptr);
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}
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}
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// --------------------------------------- Getters & Setters ------------------------------------------ //
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VkFormat* DeviceControl::getImageFormat() {
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return &swapChainImageFormat;
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}
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VkExtent2D DeviceControl::getSwapChainExtent() {
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return swapChainExtent;
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}
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std::vector<VkImage> DeviceControl::getSwapChainImages() {
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return swapChainImages;
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}
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}
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