Implement creating logical device

src/main.zig

@@ -13,8 +13,8 @@ pub fn main() !void {
     defer _ = gpa.deinit();
     const allocator = gpa.allocator();
 
-    const vulkan_renderer = try VulkanRenderer.init(window, allocator);
+    var vulkan_renderer = try VulkanRenderer.init(window, allocator);
-    _ = vulkan_renderer;
+    defer vulkan_renderer.deinit();
 
     mainLoop: while (true) {
         while (sdl.pollEvent()) |ev| {
@@ -36,8 +36,6 @@ fn initWindow() !sdl.Window {
         std.log.err("Failed to initialize SDL2", .{});
     };
 
-    try sdl.vulkan.loadLibrary(null);
-
     return try sdl.createWindow(
         "Vulkan Test",
         .{ .centered = {} },

src/utilities.zig

@@ -0,0 +1,10 @@
+const std = @import("std");
+const vk = @import("vulkan");
+
+pub const QueueFamilyIndices = struct {
+    graphics_family: ?u32,
+
+    pub fn isValid(self: QueueFamilyIndices) bool {
+        return self.graphics_family != null;
+    }
+};

src/vulkan_renderer.zig

@@ -1,27 +1,33 @@
 const std = @import("std");
 const sdl = @import("sdl2");
 const vk = @import("vulkan");
+const QueueFamilyIndices = @import("utilities.zig").QueueFamilyIndices;
 
 const apis: []const vk.ApiInfo = &.{
-    // You can either add invidiual functions by manually creating an 'api'
     .{
         .base_commands = .{
             .createInstance = true,
         },
         .instance_commands = .{
             .createDevice = true,
+            // .getDeviceProcAddr = true,
         },
     },
-    // Or you can add entire feature sets or extensions
     vk.features.version_1_0,
+    vk.features.version_1_1,
+    vk.features.version_1_2,
+    vk.features.version_1_3,
     vk.extensions.khr_surface,
     vk.extensions.khr_swapchain,
 };
 
 const BaseDispatch = vk.BaseWrapper(apis);
 const InstanceDispatch = vk.InstanceWrapper(apis);
+const DeviceDispatch = vk.DeviceWrapper(apis);
 
 const Instance = vk.InstanceProxy(apis);
+const Device = vk.DeviceProxy(apis);
+const Queue = vk.QueueProxy(apis);
 
 pub const VulkanRenderer = struct {
     const Self = @This();
@@ -33,20 +39,53 @@ pub const VulkanRenderer = struct {
     window: sdl.Window,
 
     instance: Instance,
+    physical_device: vk.PhysicalDevice,
+    device: Device,
+    graphics_queue: Queue,
     surface: vk.SurfaceKHR,
 
     pub fn init(window: sdl.Window, allocator: std.mem.Allocator) !Self {
-        const vkb = try BaseDispatch.load(try sdl.vulkan.getVkGetInstanceProcAddr());
+        var self: Self = undefined;
+        self.window = window;
+        self.allocator = allocator;
 
-        const extensions = try sdl.vulkan.getInstanceExtensionsAlloc(window, allocator);
+        self.vkb = try BaseDispatch.load(try sdl.vulkan.getVkGetInstanceProcAddr());
-        defer allocator.free(extensions);
+
+        const instance = try self.createInstance();
+
+        const vki = try allocator.create(InstanceDispatch);
+        errdefer allocator.destroy(vki);
+        vki.* = try InstanceDispatch.load(instance, self.vkb.dispatch.vkGetInstanceProcAddr);
+
+        self.instance = Instance.init(instance, vki);
+        // self.surface = try sdl.vulkan.createSurface(self.window, self.instance.handle);
+        self.physical_device = try self.getPhysicalDevice();
+
+        const device = try self.createLogicalDevice();
+
+        const vkd = try allocator.create(DeviceDispatch);
+        errdefer allocator.destroy(vkd);
+        // FIXME Why does it only work with no fail?
+        vkd.* = DeviceDispatch.loadNoFail(device, self.instance.wrapper.dispatch.vkGetDeviceProcAddr);
+
+        self.device = Device.init(device, vkd);
+        const queue = try self.getDeviceQueues();
+
+        self.graphics_queue = Queue.init(queue, vkd);
+
+        return self;
+    }
+
+    fn createInstance(self: Self) !vk.Instance {
+        const extensions = try sdl.vulkan.getInstanceExtensionsAlloc(self.window, self.allocator);
+        defer self.allocator.free(extensions);
 
         std.debug.print("[Required instance extensions]\n", .{});
         for (extensions) |ext| {
             std.debug.print("\t- {s}\n", .{ext});
         }
 
-        if (!try checkExtensions(vkb, &extensions, allocator)) {
+        if (!try self.checkExtensions(&extensions)) {
             return error.ExtensionNotPresent;
         }
 
@@ -58,53 +97,25 @@ pub const VulkanRenderer = struct {
             .api_version = vk.API_VERSION_1_3,
         };
 
-        const inst = try vkb.createInstance(&.{
+        return try self.vkb.createInstance(&.{
             .p_application_info = &app_info,
             .enabled_extension_count = @intCast(extensions.len),
             .pp_enabled_extension_names = @ptrCast(extensions),
         }, null);
-
-        const vki = try allocator.create(InstanceDispatch);
-        defer allocator.destroy(vki);
-        vki.* = try InstanceDispatch.load(inst, vkb.dispatch.vkGetInstanceProcAddr);
-        var instance = Instance.init(inst, vki);
-        errdefer instance.destroyInstance(null);
-
-        const surface = try sdl.vulkan.createSurface(window, instance.handle);
-
-        var physical_device_count: u32 = 0;
-        _ = try instance.enumeratePhysicalDevices(&physical_device_count, null);
-
-        std.debug.print("Physical devices: {d}\n", .{physical_device_count});
-
-        return .{
-            .allocator = allocator,
-            .window = window,
-            .vkb = vkb,
-            .instance = instance,
-            .surface = surface,
-        };
     }
 
-    pub fn deinit(self: *Self) void {
+    fn checkExtensions(self: Self, required_extensions: *const [][*:0]const u8) !bool {
-        self.instance.destroySurfaceKHR(self.surface, null);
-        self.instance.destroyInstance(null);
-
-        self.allocator.destroy(self.instance.wrapper);
-    }
-};
-
-fn checkExtensions(vkb: BaseDispatch, required_extensions: *const [][*:0]const u8, allocator: std.mem.Allocator) !bool {
         var prop_count: u32 = 0;
-    _ = try vkb.enumerateInstanceExtensionProperties(null, &prop_count, null);
+        _ = try self.vkb.enumerateInstanceExtensionProperties(null, &prop_count, null);
 
-    const props = try allocator.alloc(vk.ExtensionProperties, prop_count);
+        const props = try self.allocator.alloc(vk.ExtensionProperties, prop_count);
-    defer allocator.free(props);
+        defer self.allocator.free(props);
 
-    _ = try vkb.enumerateInstanceExtensionProperties(null, &prop_count, props.ptr);
+        _ = try self.vkb.enumerateInstanceExtensionProperties(null, &prop_count, props.ptr);
 
         for (required_extensions.*) |required_extension| {
             var found = false;
+
             for (props) |prop| {
                 if (std.mem.eql(u8, std.mem.sliceTo(&prop.extension_name, 0), std.mem.span(required_extension))) {
                     found = true;
@@ -117,4 +128,97 @@ fn checkExtensions(vkb: BaseDispatch, required_extensions: *const [][*:0]const u
         }
 
         return true;
-}
+    }
+
+    fn getPhysicalDevice(self: Self) !vk.PhysicalDevice {
+        var pdev_count: u32 = 0;
+        _ = try self.instance.enumeratePhysicalDevices(&pdev_count, null);
+
+        const pdevs = try self.allocator.alloc(vk.PhysicalDevice, pdev_count);
+        defer self.allocator.free(pdevs);
+
+        _ = try self.instance.enumeratePhysicalDevices(&pdev_count, pdevs.ptr);
+
+        for (pdevs) |pdev| {
+            if (self.checkDeviceSuitable(pdev)) {
+                return pdev;
+            }
+        }
+
+        // TODO Obviously needs to be something else
+        unreachable;
+    }
+
+    fn checkDeviceSuitable(self: Self, pdev: vk.PhysicalDevice) bool {
+        const pdev_properties = self.instance.getPhysicalDeviceProperties(pdev);
+
+        if (pdev_properties.device_type == .cpu) {
+            return false;
+        }
+
+        const queue_family_indices = self.getQueueFamilies(pdev) catch {
+            return false;
+        };
+
+        return queue_family_indices.isValid();
+    }
+
+    fn getQueueFamilies(self: Self, pdev: vk.PhysicalDevice) !QueueFamilyIndices {
+        var indices: QueueFamilyIndices = .{ .graphics_family = null };
+
+        var queue_family_count: u32 = 0;
+        self.instance.getPhysicalDeviceQueueFamilyProperties(pdev, &queue_family_count, null);
+
+        const queue_family_list = try self.allocator.alloc(vk.QueueFamilyProperties, queue_family_count);
+        defer self.allocator.free(queue_family_list);
+
+        self.instance.getPhysicalDeviceQueueFamilyProperties(pdev, &queue_family_count, queue_family_list.ptr);
+
+        for (queue_family_list, 0..) |queue_family, i| {
+            if (queue_family.queue_count > 0 and queue_family.queue_flags.graphics_bit) {
+                indices.graphics_family = @intCast(i);
+            }
+
+            if (indices.isValid()) {
+                return indices;
+            }
+        }
+
+        unreachable;
+    }
+
+    fn createLogicalDevice(self: Self) !vk.Device {
+        const indices = try self.getQueueFamilies(self.physical_device);
+        // 1 is the highest priority
+        const priority = [_]f32{1};
+
+        const queue_create_info = [_]vk.DeviceQueueCreateInfo{.{
+            .queue_family_index = indices.graphics_family.?,
+            .queue_count = 1,
+            .p_queue_priorities = &priority,
+        }};
+
+        const device_create_info: vk.DeviceCreateInfo = .{
+            .queue_create_info_count = 1,
+            .p_queue_create_infos = &queue_create_info,
+            .enabled_extension_count = 0,
+        };
+
+        return try self.instance.createDevice(self.physical_device, &device_create_info, null);
+    }
+
+    fn getDeviceQueues(self: Self) !vk.Queue {
+        const indices = try self.getQueueFamilies(self.physical_device);
+
+        return self.device.getDeviceQueue(indices.graphics_family.?, 0);
+    }
+
+    pub fn deinit(self: *Self) void {
+        self.device.destroyDevice(null);
+        // self.instance.destroySurfaceKHR(self.surface, null);
+        self.instance.destroyInstance(null);
+
+        self.allocator.destroy(self.device.wrapper);
+        self.allocator.destroy(self.instance.wrapper);
+    }
+};