working on device

src/vulkan/PhysicalDevice.zig

@@ -2,20 +2,27 @@ const std = @import("std");
 const vk = @import("vulkan");
 const root = @import("lib.zig");
 const Instance = @import("Instance.zig");
+const Device = @import("Device.zig");
 const dispatchable = @import("dispatchable.zig");
+const VulkanAllocator = @import("VulkanAllocator.zig");
+
+const Dispatchable = dispatchable.Dispatchable;
 
 const Self = @This();
 pub const ObjectType: vk.ObjectType = .physical_device;
 
 props: vk.PhysicalDeviceProperties,
+mem_props: vk.PhysicalDeviceMemoryProperties,
 instance: *const Instance,
 dispatch_table: DispatchTable,
 driver_data: ?*anyopaque,
 
-pub const DispatchTable = struct {};
+pub const DispatchTable = struct {
+    createImplDevice: ?*const fn (*Self, vk.DeviceCreateInfo, std.mem.Allocator) anyerror!?*anyopaque,
+};
 
-pub fn init(instance: *const Instance, allocator: std.mem.Allocator) !*dispatchable.Dispatchable(Self) {
-    const dispatchable_physical_device = try dispatchable.Dispatchable(Self).create(allocator);
+pub fn init(instance: *const Instance, allocator: std.mem.Allocator) !*Dispatchable(Self) {
+    const dispatchable_physical_device = try Dispatchable(Self).create(allocator);
     errdefer dispatchable_physical_device.destroy(allocator);
 
     const self = dispatchable_physical_device.object;
@@ -32,6 +39,13 @@ pub fn init(instance: *const Instance, allocator: std.mem.Allocator) !*dispatcha
         .sparse_properties = undefined,
     };
 
+    self.mem_props = .{
+        .memory_type_count = 0,
+        .memory_types = undefined,
+        .memory_heap_count = 0,
+        .memory_heaps = undefined,
+    };
+
     self.driver_data = null;
     self.instance = instance;
     self.dispatch_table = .{};
@@ -39,17 +53,50 @@ pub fn init(instance: *const Instance, allocator: std.mem.Allocator) !*dispatcha
     return dispatchable_physical_device;
 }
 
+pub fn createDevice(p_physical_device: vk.PhysicalDevice, p_infos: ?*const vk.DeviceCreateInfo, callbacks: ?*const vk.AllocationCallbacks, p_device: *vk.Device) callconv(vk.vulkan_call_conv) vk.Result {
+    const infos = p_infos orelse return .error_initialization_failed;
+    if (infos.s_type != .device_create_info) {
+        return .error_initialization_failed;
+    }
+
+    const self = dispatchable.fromHandleObject(Self, @intFromEnum(p_physical_device)) catch return .error_unknown;
+
+    const deref_callbacks = if (callbacks) |c| c.* else null;
+
+    const allocator = VulkanAllocator.init(deref_callbacks, .instance).allocator();
+
+    const dispatchable_device = Dispatchable(Device).create(allocator) catch return .error_out_of_host_memory;
+    const device = dispatchable_device.object;
+    device.dispatch_table = .{};
+
+    if (self.dispatch_table.createImplDevice) |pfnCreateImplDevice| {
+        device.driver_data = pfnCreateImplDevice(self, infos, allocator) catch return .error_initialization_failed;
+    } else if (std.process.hasEnvVar(allocator, root.DRIVER_LOGS_ENV_NAME) catch false) {
+        std.log.scoped(.vkCreateDevice).warn("Missing dispatch implementation", .{});
+    }
+
+    p_device.* = @enumFromInt(dispatchable_device.toHandle());
+    return .success;
+}
+
 pub fn getProperties(p_physical_device: vk.PhysicalDevice, properties: *vk.PhysicalDeviceProperties) callconv(vk.vulkan_call_conv) void {
     const self = dispatchable.fromHandleObject(Self, @intFromEnum(p_physical_device)) catch return;
     properties.* = self.props;
 }
 
+pub fn getMemoryProperties(p_physical_device: vk.PhysicalDevice, properties: *vk.PhysicalDeviceMemoryProperties) callconv(vk.vulkan_call_conv) void {
+    const self = dispatchable.fromHandleObject(Self, @intFromEnum(p_physical_device)) catch return;
+    properties.* = self.mem_props;
+}
+
 pub fn getProcAddr(name: []const u8) vk.PfnVoidFunction {
     const allocator = std.heap.c_allocator;
 
     const KV = struct { []const u8, vk.PfnVoidFunction };
     const pfn_map = std.StaticStringMap(vk.PfnVoidFunction).init([_]KV{
+        .{ "vkCreateDevice", @ptrCast(&createDevice) },
         .{ "vkGetPhysicalDeviceProperties", @ptrCast(&getProperties) },
+        .{ "vkGetPhysicalDeviceMemoryProperties", @ptrCast(&getMemoryProperties) },
     }, allocator) catch return null;
     defer pfn_map.deinit(allocator);