From 0c0bc759593a823d039f9099c360d024bc7b8df5 Mon Sep 17 00:00:00 2001
From: Kbz-8 <kbz_8.code@proton.me>
Date: Wed, 29 Oct 2025 17:39:28 +0100
Subject: [PATCH] working on vtable

---
 src/vulkan/Instance.zig |  4 ++++
 src/vulkan/object.zig   | 22 +++++++++++++++-------
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/src/vulkan/Instance.zig b/src/vulkan/Instance.zig
index 6677dbc..b0d9b95 100644
--- a/src/vulkan/Instance.zig
+++ b/src/vulkan/Instance.zig
@@ -1,4 +1,6 @@
+const std = @import("std");
 const vk = @import("vulkan");
+const PhysicalDevice = @import("PhysicalDevice").PhysicalDevice;
 const Object = @import("object.zig").Object;
 
 pub const Instance = extern struct {
@@ -6,4 +8,6 @@ pub const Instance = extern struct {
     const ObjectType: vk.ObjectType = .instance;
 
     object: Object,
+    physical_devices: std.ArrayList(*PhysicalDevice),
+    alloc_callbacks: vk.AllocationCallbacks,
 };
diff --git a/src/vulkan/object.zig b/src/vulkan/object.zig
index b12cb48..e964c30 100644
--- a/src/vulkan/object.zig
+++ b/src/vulkan/object.zig
@@ -23,15 +23,14 @@ pub const Object = extern struct {
 };
 
 pub inline fn fromHandle(comptime T: type, comptime VkT: type, handle: VkT) !*T {
-    if (handle == .null_handle) {
-        return error.NullHandle;
+    comptime {
+        if (!@hasDecl(T, "object") or !@hasDecl(T, "ObjectType") or @TypeOf(T.ObjectType) != vk.ObjectType) {
+            @compileError("Object type \"" ++ @typeName(T) ++ "\" is malformed.");
+        }
     }
 
-    if (!@hasDecl(T, "object")) {
-        return error.NotAnObject;
-    }
-    if (!@hasDecl(T, "ObjectType") || @TypeOf(T.ObjectType) != vk.ObjectType) {
-        @panic("Object type \"" ++ @typeName(T) ++ "\" is malformed.");
+    if (handle == .null_handle) {
+        return error.NullHandle;
     }
 
     const dispatchable: *T = @ptrFromInt(@intFromEnum(handle));
@@ -40,3 +39,12 @@ pub inline fn fromHandle(comptime T: type, comptime VkT: type, handle: VkT) !*T
     }
     return dispatchable;
 }
+
+pub inline fn toHandle(comptime T: type, handle: *T) usize {
+    comptime {
+        if (!@hasDecl(T, "object") or !@hasDecl(T, "ObjectType") or @TypeOf(T.ObjectType) != vk.ObjectType) {
+            @compileError("Object type \"" ++ @typeName(T) ++ "\" is malformed.");
+        }
+    }
+    return @intFromPtr(handle);
+}