2 files changed, 887 insertions, 0 deletions

diff --git a/src/video_core/renderer_vulkan/wrapper.cpp b/src/video_core/renderer_vulkan/wrapper.cpp
new file mode 100644
index 000000000..c412b7f20
--- /dev/null
+++ b/src/video_core/renderer_vulkan/wrapper.cpp
@@ -0,0 +1,342 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <exception>
+#include <memory>
+#include <optional>
+#include <utility>
+#include <vector>
+
+#include "common/common_types.h"
+
+#include "video_core/renderer_vulkan/wrapper.h"
+
+namespace Vulkan::vk {
+
+namespace {
+
+template <typename T>
+bool Proc(T& result, const InstanceDispatch& dld, const char* proc_name,
+          VkInstance instance = nullptr) noexcept {
+    result = reinterpret_cast<T>(dld.vkGetInstanceProcAddr(instance, proc_name));
+    return result != nullptr;
+}
+
+template <typename T>
+void Proc(T& result, const DeviceDispatch& dld, const char* proc_name, VkDevice device) noexcept {
+    result = reinterpret_cast<T>(dld.vkGetDeviceProcAddr(device, proc_name));
+}
+
+void Load(VkDevice device, DeviceDispatch& dld) noexcept {
+#define X(name) Proc(dld.name, dld, #name, device)
+    X(vkAcquireNextImageKHR);
+    X(vkAllocateCommandBuffers);
+    X(vkAllocateDescriptorSets);
+    X(vkAllocateMemory);
+    X(vkBeginCommandBuffer);
+    X(vkBindBufferMemory);
+    X(vkBindImageMemory);
+    X(vkCmdBeginQuery);
+    X(vkCmdBeginRenderPass);
+    X(vkCmdBeginTransformFeedbackEXT);
+    X(vkCmdBindDescriptorSets);
+    X(vkCmdBindIndexBuffer);
+    X(vkCmdBindPipeline);
+    X(vkCmdBindTransformFeedbackBuffersEXT);
+    X(vkCmdBindVertexBuffers);
+    X(vkCmdBlitImage);
+    X(vkCmdClearAttachments);
+    X(vkCmdCopyBuffer);
+    X(vkCmdCopyBufferToImage);
+    X(vkCmdCopyImage);
+    X(vkCmdCopyImageToBuffer);
+    X(vkCmdDispatch);
+    X(vkCmdDraw);
+    X(vkCmdDrawIndexed);
+    X(vkCmdEndQuery);
+    X(vkCmdEndRenderPass);
+    X(vkCmdEndTransformFeedbackEXT);
+    X(vkCmdFillBuffer);
+    X(vkCmdPipelineBarrier);
+    X(vkCmdPushConstants);
+    X(vkCmdSetBlendConstants);
+    X(vkCmdSetCheckpointNV);
+    X(vkCmdSetDepthBias);
+    X(vkCmdSetDepthBounds);
+    X(vkCmdSetScissor);
+    X(vkCmdSetStencilCompareMask);
+    X(vkCmdSetStencilReference);
+    X(vkCmdSetStencilWriteMask);
+    X(vkCmdSetViewport);
+    X(vkCreateBuffer);
+    X(vkCreateBufferView);
+    X(vkCreateCommandPool);
+    X(vkCreateComputePipelines);
+    X(vkCreateDescriptorPool);
+    X(vkCreateDescriptorSetLayout);
+    X(vkCreateDescriptorUpdateTemplateKHR);
+    X(vkCreateFence);
+    X(vkCreateFramebuffer);
+    X(vkCreateGraphicsPipelines);
+    X(vkCreateImage);
+    X(vkCreateImageView);
+    X(vkCreatePipelineLayout);
+    X(vkCreateQueryPool);
+    X(vkCreateRenderPass);
+    X(vkCreateSampler);
+    X(vkCreateSemaphore);
+    X(vkCreateShaderModule);
+    X(vkCreateSwapchainKHR);
+    X(vkDestroyBuffer);
+    X(vkDestroyBufferView);
+    X(vkDestroyCommandPool);
+    X(vkDestroyDescriptorPool);
+    X(vkDestroyDescriptorSetLayout);
+    X(vkDestroyDescriptorUpdateTemplateKHR);
+    X(vkDestroyFence);
+    X(vkDestroyFramebuffer);
+    X(vkDestroyImage);
+    X(vkDestroyImageView);
+    X(vkDestroyPipeline);
+    X(vkDestroyPipelineLayout);
+    X(vkDestroyQueryPool);
+    X(vkDestroyRenderPass);
+    X(vkDestroySampler);
+    X(vkDestroySemaphore);
+    X(vkDestroyShaderModule);
+    X(vkDestroySwapchainKHR);
+    X(vkDeviceWaitIdle);
+    X(vkEndCommandBuffer);
+    X(vkFreeCommandBuffers);
+    X(vkFreeDescriptorSets);
+    X(vkFreeMemory);
+    X(vkGetBufferMemoryRequirements);
+    X(vkGetDeviceQueue);
+    X(vkGetFenceStatus);
+    X(vkGetImageMemoryRequirements);
+    X(vkGetQueryPoolResults);
+    X(vkGetQueueCheckpointDataNV);
+    X(vkMapMemory);
+    X(vkQueueSubmit);
+    X(vkResetFences);
+    X(vkResetQueryPoolEXT);
+    X(vkUnmapMemory);
+    X(vkUpdateDescriptorSetWithTemplateKHR);
+    X(vkUpdateDescriptorSets);
+    X(vkWaitForFences);
+#undef X
+}
+
+} // Anonymous namespace
+
+bool Load(InstanceDispatch& dld) noexcept {
+#define X(name) Proc(dld.name, dld, #name)
+    return X(vkCreateInstance) && X(vkEnumerateInstanceExtensionProperties);
+#undef X
+}
+
+bool Load(VkInstance instance, InstanceDispatch& dld) noexcept {
+#define X(name) Proc(dld.name, dld, #name, instance)
+    // These functions may fail to load depending on the enabled extensions.
+    // Don't return a failure on these.
+    X(vkCreateDebugUtilsMessengerEXT);
+    X(vkDestroyDebugUtilsMessengerEXT);
+    X(vkDestroySurfaceKHR);
+    X(vkGetPhysicalDeviceFeatures2KHR);
+    X(vkGetPhysicalDeviceProperties2KHR);
+    X(vkGetPhysicalDeviceSurfaceCapabilitiesKHR);
+    X(vkGetPhysicalDeviceSurfaceFormatsKHR);
+    X(vkGetPhysicalDeviceSurfacePresentModesKHR);
+    X(vkGetPhysicalDeviceSurfaceSupportKHR);
+    X(vkGetSwapchainImagesKHR);
+    X(vkQueuePresentKHR);
+
+    return X(vkCreateDevice) && X(vkDestroyDevice) && X(vkDestroyDevice) &&
+           X(vkEnumerateDeviceExtensionProperties) && X(vkEnumeratePhysicalDevices) &&
+           X(vkGetDeviceProcAddr) && X(vkGetPhysicalDeviceFormatProperties) &&
+           X(vkGetPhysicalDeviceMemoryProperties) && X(vkGetPhysicalDeviceProperties) &&
+           X(vkGetPhysicalDeviceQueueFamilyProperties);
+#undef X
+}
+
+const char* Exception::what() const noexcept {
+    return ToString(result);
+}
+
+const char* ToString(VkResult result) noexcept {
+    switch (result) {
+    case VkResult::VK_SUCCESS:
+        return "VK_SUCCESS";
+    case VkResult::VK_NOT_READY:
+        return "VK_NOT_READY";
+    case VkResult::VK_TIMEOUT:
+        return "VK_TIMEOUT";
+    case VkResult::VK_EVENT_SET:
+        return "VK_EVENT_SET";
+    case VkResult::VK_EVENT_RESET:
+        return "VK_EVENT_RESET";
+    case VkResult::VK_INCOMPLETE:
+        return "VK_INCOMPLETE";
+    case VkResult::VK_ERROR_OUT_OF_HOST_MEMORY:
+        return "VK_ERROR_OUT_OF_HOST_MEMORY";
+    case VkResult::VK_ERROR_OUT_OF_DEVICE_MEMORY:
+        return "VK_ERROR_OUT_OF_DEVICE_MEMORY";
+    case VkResult::VK_ERROR_INITIALIZATION_FAILED:
+        return "VK_ERROR_INITIALIZATION_FAILED";
+    case VkResult::VK_ERROR_DEVICE_LOST:
+        return "VK_ERROR_DEVICE_LOST";
+    case VkResult::VK_ERROR_MEMORY_MAP_FAILED:
+        return "VK_ERROR_MEMORY_MAP_FAILED";
+    case VkResult::VK_ERROR_LAYER_NOT_PRESENT:
+        return "VK_ERROR_LAYER_NOT_PRESENT";
+    case VkResult::VK_ERROR_EXTENSION_NOT_PRESENT:
+        return "VK_ERROR_EXTENSION_NOT_PRESENT";
+    case VkResult::VK_ERROR_FEATURE_NOT_PRESENT:
+        return "VK_ERROR_FEATURE_NOT_PRESENT";
+    case VkResult::VK_ERROR_INCOMPATIBLE_DRIVER:
+        return "VK_ERROR_INCOMPATIBLE_DRIVER";
+    case VkResult::VK_ERROR_TOO_MANY_OBJECTS:
+        return "VK_ERROR_TOO_MANY_OBJECTS";
+    case VkResult::VK_ERROR_FORMAT_NOT_SUPPORTED:
+        return "VK_ERROR_FORMAT_NOT_SUPPORTED";
+    case VkResult::VK_ERROR_FRAGMENTED_POOL:
+        return "VK_ERROR_FRAGMENTED_POOL";
+    case VkResult::VK_ERROR_OUT_OF_POOL_MEMORY:
+        return "VK_ERROR_OUT_OF_POOL_MEMORY";
+    case VkResult::VK_ERROR_INVALID_EXTERNAL_HANDLE:
+        return "VK_ERROR_INVALID_EXTERNAL_HANDLE";
+    case VkResult::VK_ERROR_SURFACE_LOST_KHR:
+        return "VK_ERROR_SURFACE_LOST_KHR";
+    case VkResult::VK_ERROR_NATIVE_WINDOW_IN_USE_KHR:
+        return "VK_ERROR_NATIVE_WINDOW_IN_USE_KHR";
+    case VkResult::VK_SUBOPTIMAL_KHR:
+        return "VK_SUBOPTIMAL_KHR";
+    case VkResult::VK_ERROR_OUT_OF_DATE_KHR:
+        return "VK_ERROR_OUT_OF_DATE_KHR";
+    case VkResult::VK_ERROR_INCOMPATIBLE_DISPLAY_KHR:
+        return "VK_ERROR_INCOMPATIBLE_DISPLAY_KHR";
+    case VkResult::VK_ERROR_VALIDATION_FAILED_EXT:
+        return "VK_ERROR_VALIDATION_FAILED_EXT";
+    case VkResult::VK_ERROR_INVALID_SHADER_NV:
+        return "VK_ERROR_INVALID_SHADER_NV";
+    case VkResult::VK_ERROR_INVALID_DRM_FORMAT_MODIFIER_PLANE_LAYOUT_EXT:
+        return "VK_ERROR_INVALID_DRM_FORMAT_MODIFIER_PLANE_LAYOUT_EXT";
+    case VkResult::VK_ERROR_FRAGMENTATION_EXT:
+        return "VK_ERROR_FRAGMENTATION_EXT";
+    case VkResult::VK_ERROR_NOT_PERMITTED_EXT:
+        return "VK_ERROR_NOT_PERMITTED_EXT";
+    case VkResult::VK_ERROR_INVALID_DEVICE_ADDRESS_EXT:
+        return "VK_ERROR_INVALID_DEVICE_ADDRESS_EXT";
+    case VkResult::VK_ERROR_FULL_SCREEN_EXCLUSIVE_MODE_LOST_EXT:
+        return "VK_ERROR_FULL_SCREEN_EXCLUSIVE_MODE_LOST_EXT";
+    }
+    return "Unknown";
+}
+
+void Destroy(VkInstance instance, const InstanceDispatch& dld) noexcept {
+    dld.vkDestroyInstance(instance, nullptr);
+}
+
+void Destroy(VkDevice device, const InstanceDispatch& dld) noexcept {
+    dld.vkDestroyDevice(device, nullptr);
+}
+
+void Destroy(VkDevice device, VkBuffer handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyBuffer(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkBufferView handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyBufferView(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkCommandPool handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyCommandPool(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkDescriptorPool handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyDescriptorPool(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkDescriptorSetLayout handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyDescriptorSetLayout(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkDescriptorUpdateTemplateKHR handle,
+             const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyDescriptorUpdateTemplateKHR(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkDeviceMemory handle, const DeviceDispatch& dld) noexcept {
+    dld.vkFreeMemory(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkFence handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyFence(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkFramebuffer handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyFramebuffer(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkImage handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyImage(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkImageView handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyImageView(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkPipeline handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyPipeline(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkPipelineLayout handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyPipelineLayout(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkQueryPool handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyQueryPool(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkRenderPass handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyRenderPass(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkSampler handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroySampler(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkSwapchainKHR handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroySwapchainKHR(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkSemaphore handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroySemaphore(device, handle, nullptr);
+}
+
+void Destroy(VkDevice device, VkShaderModule handle, const DeviceDispatch& dld) noexcept {
+    dld.vkDestroyShaderModule(device, handle, nullptr);
+}
+
+void Destroy(VkInstance instance, VkDebugUtilsMessengerEXT handle,
+             const InstanceDispatch& dld) noexcept {
+    dld.vkDestroyDebugUtilsMessengerEXT(instance, handle, nullptr);
+}
+
+void Destroy(VkInstance instance, VkSurfaceKHR handle, const InstanceDispatch& dld) noexcept {
+    dld.vkDestroySurfaceKHR(instance, handle, nullptr);
+}
+
+VkResult Free(VkDevice device, VkDescriptorPool handle, Span<VkDescriptorSet> sets,
+              const DeviceDispatch& dld) noexcept {
+    return dld.vkFreeDescriptorSets(device, handle, sets.size(), sets.data());
+}
+
+VkResult Free(VkDevice device, VkCommandPool handle, Span<VkCommandBuffer> buffers,
+              const DeviceDispatch& dld) noexcept {
+    dld.vkFreeCommandBuffers(device, handle, buffers.size(), buffers.data());
+    return VK_SUCCESS;
+}
+
+} // namespace Vulkan::vk
diff --git a/src/video_core/renderer_vulkan/wrapper.h b/src/video_core/renderer_vulkan/wrapper.h
new file mode 100644
index 000000000..686c2b9a1
--- /dev/null
+++ b/src/video_core/renderer_vulkan/wrapper.h
@@ -0,0 +1,545 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <exception>
+#include <iterator>
+#include <limits>
+#include <memory>
+#include <optional>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#define VK_NO_PROTOTYPES
+#include <vulkan/vulkan.h>
+
+#include "common/common_types.h"
+
+namespace Vulkan::vk {
+
+/**
+ * Span for Vulkan arrays.
+ * Based on std::span but optimized for array access instead of iterators.
+ * Size returns uint32_t instead of size_t to ease interaction with Vulkan functions.
+ */
+template <typename T>
+class Span {
+public:
+    using value_type = T;
+    using size_type = u32;
+    using difference_type = std::ptrdiff_t;
+    using reference = const T&;
+    using const_reference = const T&;
+    using pointer = const T*;
+    using const_pointer = const T*;
+    using iterator = const T*;
+    using const_iterator = const T*;
+
+    /// Construct an empty span.
+    constexpr Span() noexcept = default;
+
+    /// Construct a span from a single element.
+    constexpr Span(const T& value) noexcept : ptr{&value}, num{1} {}
+
+    /// Construct a span from a range.
+    template <typename Range>
+    // requires std::data(const Range&)
+    // requires std::size(const Range&)
+    constexpr Span(const Range& range) : ptr{std::data(range)}, num{std::size(range)} {}
+
+    /// Construct a span from a pointer and a size.
+    /// This is inteded for subranges.
+    constexpr Span(const T* ptr, std::size_t num) noexcept : ptr{ptr}, num{num} {}
+
+    /// Returns the data pointer by the span.
+    constexpr const T* data() const noexcept {
+        return ptr;
+    }
+
+    /// Returns the number of elements in the span.
+    /// @note Returns a 32 bits integer because most Vulkan functions expect this type.
+    constexpr u32 size() const noexcept {
+        return static_cast<u32>(num);
+    }
+
+    /// Returns true when the span is empty.
+    constexpr bool empty() const noexcept {
+        return num == 0;
+    }
+
+    /// Returns a reference to the element in the passed index.
+    /// @pre: index < size()
+    constexpr const T& operator[](std::size_t index) const noexcept {
+        return ptr[index];
+    }
+
+    /// Returns an iterator to the beginning of the span.
+    constexpr const T* begin() const noexcept {
+        return ptr;
+    }
+
+    /// Returns an iterator to the end of the span.
+    constexpr const T* end() const noexcept {
+        return ptr + num;
+    }
+
+    /// Returns an iterator to the beginning of the span.
+    constexpr const T* cbegin() const noexcept {
+        return ptr;
+    }
+
+    /// Returns an iterator to the end of the span.
+    constexpr const T* cend() const noexcept {
+        return ptr + num;
+    }
+
+private:
+    const T* ptr = nullptr;
+    std::size_t num = 0;
+};
+
+/// Vulkan exception generated from a VkResult.
+class Exception final : public std::exception {
+public:
+    /// Construct the exception with a result.
+    /// @pre result != VK_SUCCESS
+    explicit Exception(VkResult result_) : result{result_} {}
+    virtual ~Exception() = default;
+
+    const char* what() const noexcept override;
+
+private:
+    VkResult result;
+};
+
+/// Converts a VkResult enum into a rodata string
+const char* ToString(VkResult) noexcept;
+
+/// Throws a Vulkan exception if result is not success.
+inline void Check(VkResult result) {
+    if (result != VK_SUCCESS) {
+        throw Exception(result);
+    }
+}
+
+/// Throws a Vulkan exception if result is an error.
+/// @return result
+inline VkResult Filter(VkResult result) {
+    if (result < 0) {
+        throw Exception(result);
+    }
+    return result;
+}
+
+/// Table holding Vulkan instance function pointers.
+struct InstanceDispatch {
+    PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr;
+
+    PFN_vkCreateInstance vkCreateInstance;
+    PFN_vkDestroyInstance vkDestroyInstance;
+    PFN_vkEnumerateInstanceExtensionProperties vkEnumerateInstanceExtensionProperties;
+
+    PFN_vkCreateDebugUtilsMessengerEXT vkCreateDebugUtilsMessengerEXT;
+    PFN_vkCreateDevice vkCreateDevice;
+    PFN_vkDestroyDebugUtilsMessengerEXT vkDestroyDebugUtilsMessengerEXT;
+    PFN_vkDestroyDevice vkDestroyDevice;
+    PFN_vkDestroySurfaceKHR vkDestroySurfaceKHR;
+    PFN_vkEnumerateDeviceExtensionProperties vkEnumerateDeviceExtensionProperties;
+    PFN_vkEnumeratePhysicalDevices vkEnumeratePhysicalDevices;
+    PFN_vkGetDeviceProcAddr vkGetDeviceProcAddr;
+    PFN_vkGetPhysicalDeviceFeatures2KHR vkGetPhysicalDeviceFeatures2KHR;
+    PFN_vkGetPhysicalDeviceFormatProperties vkGetPhysicalDeviceFormatProperties;
+    PFN_vkGetPhysicalDeviceMemoryProperties vkGetPhysicalDeviceMemoryProperties;
+    PFN_vkGetPhysicalDeviceProperties vkGetPhysicalDeviceProperties;
+    PFN_vkGetPhysicalDeviceProperties2KHR vkGetPhysicalDeviceProperties2KHR;
+    PFN_vkGetPhysicalDeviceQueueFamilyProperties vkGetPhysicalDeviceQueueFamilyProperties;
+    PFN_vkGetPhysicalDeviceSurfaceCapabilitiesKHR vkGetPhysicalDeviceSurfaceCapabilitiesKHR;
+    PFN_vkGetPhysicalDeviceSurfaceFormatsKHR vkGetPhysicalDeviceSurfaceFormatsKHR;
+    PFN_vkGetPhysicalDeviceSurfacePresentModesKHR vkGetPhysicalDeviceSurfacePresentModesKHR;
+    PFN_vkGetPhysicalDeviceSurfaceSupportKHR vkGetPhysicalDeviceSurfaceSupportKHR;
+    PFN_vkGetSwapchainImagesKHR vkGetSwapchainImagesKHR;
+    PFN_vkQueuePresentKHR vkQueuePresentKHR;
+};
+
+/// Table holding Vulkan device function pointers.
+struct DeviceDispatch : public InstanceDispatch {
+    PFN_vkAcquireNextImageKHR vkAcquireNextImageKHR;
+    PFN_vkAllocateCommandBuffers vkAllocateCommandBuffers;
+    PFN_vkAllocateDescriptorSets vkAllocateDescriptorSets;
+    PFN_vkAllocateMemory vkAllocateMemory;
+    PFN_vkBeginCommandBuffer vkBeginCommandBuffer;
+    PFN_vkBindBufferMemory vkBindBufferMemory;
+    PFN_vkBindImageMemory vkBindImageMemory;
+    PFN_vkCmdBeginQuery vkCmdBeginQuery;
+    PFN_vkCmdBeginRenderPass vkCmdBeginRenderPass;
+    PFN_vkCmdBeginTransformFeedbackEXT vkCmdBeginTransformFeedbackEXT;
+    PFN_vkCmdBindDescriptorSets vkCmdBindDescriptorSets;
+    PFN_vkCmdBindIndexBuffer vkCmdBindIndexBuffer;
+    PFN_vkCmdBindPipeline vkCmdBindPipeline;
+    PFN_vkCmdBindTransformFeedbackBuffersEXT vkCmdBindTransformFeedbackBuffersEXT;
+    PFN_vkCmdBindVertexBuffers vkCmdBindVertexBuffers;
+    PFN_vkCmdBlitImage vkCmdBlitImage;
+    PFN_vkCmdClearAttachments vkCmdClearAttachments;
+    PFN_vkCmdCopyBuffer vkCmdCopyBuffer;
+    PFN_vkCmdCopyBufferToImage vkCmdCopyBufferToImage;
+    PFN_vkCmdCopyImage vkCmdCopyImage;
+    PFN_vkCmdCopyImageToBuffer vkCmdCopyImageToBuffer;
+    PFN_vkCmdDispatch vkCmdDispatch;
+    PFN_vkCmdDraw vkCmdDraw;
+    PFN_vkCmdDrawIndexed vkCmdDrawIndexed;
+    PFN_vkCmdEndQuery vkCmdEndQuery;
+    PFN_vkCmdEndRenderPass vkCmdEndRenderPass;
+    PFN_vkCmdEndTransformFeedbackEXT vkCmdEndTransformFeedbackEXT;
+    PFN_vkCmdFillBuffer vkCmdFillBuffer;
+    PFN_vkCmdPipelineBarrier vkCmdPipelineBarrier;
+    PFN_vkCmdPushConstants vkCmdPushConstants;
+    PFN_vkCmdSetBlendConstants vkCmdSetBlendConstants;
+    PFN_vkCmdSetCheckpointNV vkCmdSetCheckpointNV;
+    PFN_vkCmdSetDepthBias vkCmdSetDepthBias;
+    PFN_vkCmdSetDepthBounds vkCmdSetDepthBounds;
+    PFN_vkCmdSetScissor vkCmdSetScissor;
+    PFN_vkCmdSetStencilCompareMask vkCmdSetStencilCompareMask;
+    PFN_vkCmdSetStencilReference vkCmdSetStencilReference;
+    PFN_vkCmdSetStencilWriteMask vkCmdSetStencilWriteMask;
+    PFN_vkCmdSetViewport vkCmdSetViewport;
+    PFN_vkCreateBuffer vkCreateBuffer;
+    PFN_vkCreateBufferView vkCreateBufferView;
+    PFN_vkCreateCommandPool vkCreateCommandPool;
+    PFN_vkCreateComputePipelines vkCreateComputePipelines;
+    PFN_vkCreateDescriptorPool vkCreateDescriptorPool;
+    PFN_vkCreateDescriptorSetLayout vkCreateDescriptorSetLayout;
+    PFN_vkCreateDescriptorUpdateTemplateKHR vkCreateDescriptorUpdateTemplateKHR;
+    PFN_vkCreateFence vkCreateFence;
+    PFN_vkCreateFramebuffer vkCreateFramebuffer;
+    PFN_vkCreateGraphicsPipelines vkCreateGraphicsPipelines;
+    PFN_vkCreateImage vkCreateImage;
+    PFN_vkCreateImageView vkCreateImageView;
+    PFN_vkCreatePipelineLayout vkCreatePipelineLayout;
+    PFN_vkCreateQueryPool vkCreateQueryPool;
+    PFN_vkCreateRenderPass vkCreateRenderPass;
+    PFN_vkCreateSampler vkCreateSampler;
+    PFN_vkCreateSemaphore vkCreateSemaphore;
+    PFN_vkCreateShaderModule vkCreateShaderModule;
+    PFN_vkCreateSwapchainKHR vkCreateSwapchainKHR;
+    PFN_vkDestroyBuffer vkDestroyBuffer;
+    PFN_vkDestroyBufferView vkDestroyBufferView;
+    PFN_vkDestroyCommandPool vkDestroyCommandPool;
+    PFN_vkDestroyDescriptorPool vkDestroyDescriptorPool;
+    PFN_vkDestroyDescriptorSetLayout vkDestroyDescriptorSetLayout;
+    PFN_vkDestroyDescriptorUpdateTemplateKHR vkDestroyDescriptorUpdateTemplateKHR;
+    PFN_vkDestroyFence vkDestroyFence;
+    PFN_vkDestroyFramebuffer vkDestroyFramebuffer;
+    PFN_vkDestroyImage vkDestroyImage;
+    PFN_vkDestroyImageView vkDestroyImageView;
+    PFN_vkDestroyPipeline vkDestroyPipeline;
+    PFN_vkDestroyPipelineLayout vkDestroyPipelineLayout;
+    PFN_vkDestroyQueryPool vkDestroyQueryPool;
+    PFN_vkDestroyRenderPass vkDestroyRenderPass;
+    PFN_vkDestroySampler vkDestroySampler;
+    PFN_vkDestroySemaphore vkDestroySemaphore;
+    PFN_vkDestroyShaderModule vkDestroyShaderModule;
+    PFN_vkDestroySwapchainKHR vkDestroySwapchainKHR;
+    PFN_vkDeviceWaitIdle vkDeviceWaitIdle;
+    PFN_vkEndCommandBuffer vkEndCommandBuffer;
+    PFN_vkFreeCommandBuffers vkFreeCommandBuffers;
+    PFN_vkFreeDescriptorSets vkFreeDescriptorSets;
+    PFN_vkFreeMemory vkFreeMemory;
+    PFN_vkGetBufferMemoryRequirements vkGetBufferMemoryRequirements;
+    PFN_vkGetDeviceQueue vkGetDeviceQueue;
+    PFN_vkGetFenceStatus vkGetFenceStatus;
+    PFN_vkGetImageMemoryRequirements vkGetImageMemoryRequirements;
+    PFN_vkGetQueryPoolResults vkGetQueryPoolResults;
+    PFN_vkGetQueueCheckpointDataNV vkGetQueueCheckpointDataNV;
+    PFN_vkMapMemory vkMapMemory;
+    PFN_vkQueueSubmit vkQueueSubmit;
+    PFN_vkResetFences vkResetFences;
+    PFN_vkResetQueryPoolEXT vkResetQueryPoolEXT;
+    PFN_vkUnmapMemory vkUnmapMemory;
+    PFN_vkUpdateDescriptorSetWithTemplateKHR vkUpdateDescriptorSetWithTemplateKHR;
+    PFN_vkUpdateDescriptorSets vkUpdateDescriptorSets;
+    PFN_vkWaitForFences vkWaitForFences;
+};
+
+/// Loads instance agnostic function pointers.
+/// @return True on success, false on error.
+bool Load(InstanceDispatch&) noexcept;
+
+/// Loads instance function pointers.
+/// @return True on success, false on error.
+bool Load(VkInstance, InstanceDispatch&) noexcept;
+
+void Destroy(VkInstance, const InstanceDispatch&) noexcept;
+void Destroy(VkDevice, const InstanceDispatch&) noexcept;
+
+void Destroy(VkDevice, VkBuffer, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkBufferView, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkCommandPool, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkDescriptorPool, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkDescriptorSetLayout, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkDescriptorUpdateTemplateKHR, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkDeviceMemory, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkFence, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkFramebuffer, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkImage, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkImageView, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkPipeline, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkPipelineLayout, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkQueryPool, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkRenderPass, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkSampler, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkSwapchainKHR, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkSemaphore, const DeviceDispatch&) noexcept;
+void Destroy(VkDevice, VkShaderModule, const DeviceDispatch&) noexcept;
+void Destroy(VkInstance, VkDebugUtilsMessengerEXT, const InstanceDispatch&) noexcept;
+void Destroy(VkInstance, VkSurfaceKHR, const InstanceDispatch&) noexcept;
+
+VkResult Free(VkDevice, VkDescriptorPool, Span<VkDescriptorSet>, const DeviceDispatch&) noexcept;
+VkResult Free(VkDevice, VkCommandPool, Span<VkCommandBuffer>, const DeviceDispatch&) noexcept;
+
+template <typename Type, typename OwnerType, typename Dispatch>
+class Handle;
+
+/// Handle with an owning type.
+/// Analogue to std::unique_ptr.
+template <typename Type, typename OwnerType, typename Dispatch>
+class Handle {
+public:
+    /// Construct a handle and hold it's ownership.
+    explicit Handle(Type handle_, OwnerType owner_, const Dispatch& dld_) noexcept
+        : handle{handle_}, owner{owner_}, dld{&dld_} {}
+
+    /// Construct an empty handle.
+    Handle() = default;
+
+    /// Copying Vulkan objects is not supported and will never be.
+    Handle(const Handle&) = delete;
+    Handle& operator=(const Handle&) = delete;
+
+    /// Construct a handle transfering the ownership from another handle.
+    Handle(Handle&& rhs) noexcept
+        : handle{std::exchange(rhs.handle, nullptr)}, owner{rhs.owner}, dld{rhs.dld} {}
+
+    /// Assign the current handle transfering the ownership from another handle.
+    /// Destroys any previously held object.
+    Handle& operator=(Handle&& rhs) noexcept {
+        Release();
+        handle = std::exchange(rhs.handle, nullptr);
+        owner = rhs.owner;
+        dld = rhs.dld;
+        return *this;
+    }
+
+    /// Destroys the current handle if it existed.
+    ~Handle() noexcept {
+        Release();
+    }
+
+    /// Destroys any held object.
+    void reset() noexcept {
+        Release();
+        handle = nullptr;
+    }
+
+    /// Returns the address of the held object.
+    /// Intended for Vulkan structures that expect a pointer to an array.
+    const Type* address() const noexcept {
+        return std::addressof(handle);
+    }
+
+    /// Returns the held Vulkan handle.
+    Type operator*() const noexcept {
+        return handle;
+    }
+
+    /// Returns true when there's a held object.
+    explicit operator bool() const noexcept {
+        return handle != nullptr;
+    }
+
+protected:
+    Type handle = nullptr;
+    OwnerType owner = nullptr;
+    const Dispatch* dld = nullptr;
+
+private:
+    /// Destroys the held object if it exists.
+    void Release() noexcept {
+        if (handle) {
+            Destroy(owner, handle, *dld);
+        }
+    }
+};
+
+/// Dummy type used to specify a handle has no owner.
+struct NoOwner {};
+
+/// Handle without an owning type.
+/// Analogue to std::unique_ptr
+template <typename Type, typename Dispatch>
+class Handle<Type, NoOwner, Dispatch> {
+public:
+    /// Construct a handle and hold it's ownership.
+    explicit Handle(Type handle_, const Dispatch& dld_) noexcept : handle{handle_}, dld{&dld_} {}
+
+    /// Construct an empty handle.
+    Handle() noexcept = default;
+
+    /// Copying Vulkan objects is not supported and will never be.
+    Handle(const Handle&) = delete;
+    Handle& operator=(const Handle&) = delete;
+
+    /// Construct a handle transfering ownership from another handle.
+    Handle(Handle&& rhs) noexcept : handle{std::exchange(rhs.handle, nullptr)}, dld{rhs.dld} {}
+
+    /// Assign the current handle transfering the ownership from another handle.
+    /// Destroys any previously held object.
+    Handle& operator=(Handle&& rhs) noexcept {
+        Release();
+        handle = std::exchange(rhs.handle, nullptr);
+        dld = rhs.dld;
+        return *this;
+    }
+
+    /// Destroys the current handle if it existed.
+    ~Handle() noexcept {
+        Release();
+    }
+
+    /// Destroys any held object.
+    void reset() noexcept {
+        Release();
+        handle = nullptr;
+    }
+
+    /// Returns the address of the held object.
+    /// Intended for Vulkan structures that expect a pointer to an array.
+    const Type* address() const noexcept {
+        return std::addressof(handle);
+    }
+
+    /// Returns the held Vulkan handle.
+    Type operator*() const noexcept {
+        return handle;
+    }
+
+    /// Returns true when there's a held object.
+    operator bool() const noexcept {
+        return handle != nullptr;
+    }
+
+protected:
+    Type handle = nullptr;
+    const Dispatch* dld = nullptr;
+
+private:
+    /// Destroys the held object if it exists.
+    void Release() noexcept {
+        if (handle) {
+            Destroy(handle, *dld);
+        }
+    }
+};
+
+/// Array of a pool allocation.
+/// Analogue to std::vector
+template <typename AllocationType, typename PoolType>
+class PoolAllocations {
+public:
+    /// Construct an empty allocation.
+    PoolAllocations() = default;
+
+    /// Construct an allocation. Errors are reported through IsOutOfPoolMemory().
+    explicit PoolAllocations(std::unique_ptr<AllocationType[]> allocations, std::size_t num,
+                             VkDevice device, PoolType pool, const DeviceDispatch& dld) noexcept
+        : allocations{std::move(allocations)}, num{num}, device{device}, pool{pool}, dld{&dld} {}
+
+    /// Copying Vulkan allocations is not supported and will never be.
+    PoolAllocations(const PoolAllocations&) = delete;
+    PoolAllocations& operator=(const PoolAllocations&) = delete;
+
+    /// Construct an allocation transfering ownership from another allocation.
+    PoolAllocations(PoolAllocations&& rhs) noexcept
+        : allocations{std::move(rhs.allocations)}, num{rhs.num}, device{rhs.device}, pool{rhs.pool},
+          dld{rhs.dld} {}
+
+    /// Assign an allocation transfering ownership from another allocation.
+    /// Releases any previously held allocation.
+    PoolAllocations& operator=(PoolAllocations&& rhs) noexcept {
+        Release();
+        allocations = std::move(rhs.allocations);
+        num = rhs.num;
+        device = rhs.device;
+        pool = rhs.pool;
+        dld = rhs.dld;
+        return *this;
+    }
+
+    /// Destroys any held allocation.
+    ~PoolAllocations() {
+        Release();
+    }
+
+    /// Returns the number of allocations.
+    std::size_t size() const noexcept {
+        return num;
+    }
+
+    /// Returns a pointer to the array of allocations.
+    AllocationType const* data() const noexcept {
+        return allocations.get();
+    }
+
+    /// Returns the allocation in the specified index.
+    /// @pre index < size()
+    AllocationType operator[](std::size_t index) const noexcept {
+        return allocations[index];
+    }
+
+    /// True when a pool fails to construct.
+    bool IsOutOfPoolMemory() const noexcept {
+        return !device;
+    }
+
+private:
+    /// Destroys the held allocations if they exist.
+    void Release() noexcept {
+        if (!allocations) {
+            return;
+        }
+        const Span<AllocationType> span(allocations.get(), num);
+        const VkResult result = Free(device, pool, span, *dld);
+        // There's no way to report errors from a destructor.
+        if (result != VK_SUCCESS) {
+            std::terminate();
+        }
+    }
+
+    std::unique_ptr<AllocationType[]> allocations;
+    std::size_t num = 0;
+    VkDevice device = nullptr;
+    PoolType pool = nullptr;
+    const DeviceDispatch* dld = nullptr;
+};
+
+using BufferView = Handle<VkBufferView, VkDevice, DeviceDispatch>;
+using DebugCallback = Handle<VkDebugUtilsMessengerEXT, VkInstance, InstanceDispatch>;
+using DescriptorSetLayout = Handle<VkDescriptorSetLayout, VkDevice, DeviceDispatch>;
+using DescriptorUpdateTemplateKHR = Handle<VkDescriptorUpdateTemplateKHR, VkDevice, DeviceDispatch>;
+using Framebuffer = Handle<VkFramebuffer, VkDevice, DeviceDispatch>;
+using ImageView = Handle<VkImageView, VkDevice, DeviceDispatch>;
+using Pipeline = Handle<VkPipeline, VkDevice, DeviceDispatch>;
+using PipelineLayout = Handle<VkPipelineLayout, VkDevice, DeviceDispatch>;
+using QueryPool = Handle<VkQueryPool, VkDevice, DeviceDispatch>;
+using RenderPass = Handle<VkRenderPass, VkDevice, DeviceDispatch>;
+using Sampler = Handle<VkSampler, VkDevice, DeviceDispatch>;
+using Semaphore = Handle<VkSemaphore, VkDevice, DeviceDispatch>;
+using ShaderModule = Handle<VkShaderModule, VkDevice, DeviceDispatch>;
+using SurfaceKHR = Handle<VkSurfaceKHR, VkInstance, InstanceDispatch>;
+
+using DescriptorSets = PoolAllocations<VkDescriptorSet, VkDescriptorPool>;
+using CommandBuffers = PoolAllocations<VkCommandBuffer, VkCommandPool>;
+
+} // namespace Vulkan::vk