adding object base

build.zig

@@ -13,62 +13,49 @@ const implementations = [_]ImplementationDesc{
     },
 };
 
-pub fn build(b: *std.Build) !void {
+pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
-    const libvulkan_mod = b.createModule(.{
+    const common_mod = b.createModule(.{
         .root_source_file = b.path("src/vulkan/lib.zig"),
         .target = target,
         .optimize = optimize,
     });
 
+    const vulkan_headers = b.dependency("vulkan_headers", .{});
+
     const vulkan = b.dependency("vulkan_zig", .{
-        .registry = b.dependency("vulkan_headers", .{}).path("registry/vk.xml"),
+        .registry = vulkan_headers.path("registry/vk.xml"),
     }).module("vulkan-zig");
 
-    libvulkan_mod.addImport("vulkan", vulkan);
-
-    const libvulkan = b.addLibrary(.{
-        .name = "vulkan",
-        .root_module = libvulkan_mod,
-        .linkage = .dynamic,
-    });
-
-    b.installArtifact(libvulkan);
+    common_mod.addImport("vulkan", vulkan);
+    common_mod.addSystemIncludePath(vulkan_headers.path("include"));
 
     for (implementations) |impl| {
-        b.installArtifact(try buildImplementation(b, target, optimize, &impl, vulkan));
-    }
-
-    const libvulkan_tests = b.addTest(.{
-        .root_module = libvulkan_mod,
-    });
-
-    const run_libvulkan_tests = b.addRunArtifact(libvulkan_tests);
-
-    const test_step = b.step("test", "Run tests");
-    test_step.dependOn(&run_libvulkan_tests.step);
-}
-
-fn buildImplementation(
-    b: *std.Build,
-    target: std.Build.ResolvedTarget,
-    optimize: std.builtin.OptimizeMode,
-    desc: *const ImplementationDesc,
-    vulkan_bindings: *std.Build.Module,
-) !*Step.Compile {
         const lib_mod = b.createModule(.{
-        .root_source_file = b.path(desc.root_source_file),
+            .root_source_file = b.path(impl.root_source_file),
             .target = target,
             .optimize = optimize,
+            .imports = &.{
+                .{ .name = "common", .module = common_mod },
+                .{ .name = "vulkan", .module = vulkan },
+            },
         });
 
-    lib_mod.addImport("vulkan", vulkan_bindings);
+        lib_mod.addSystemIncludePath(vulkan_headers.path("include"));
 
-    return b.addLibrary(.{
-        .name = try std.fmt.allocPrint(b.allocator, "vulkan_{s}", .{desc.name}),
+        const lib = b.addLibrary(.{
+            .name = b.fmt("vulkan_{s}", .{impl.name}),
             .root_module = lib_mod,
             .linkage = .dynamic,
         });
+        b.installArtifact(lib);
+
+        const lib_tests = b.addTest(.{ .root_module = lib_mod });
+
+        const run_tests = b.addRunArtifact(lib_tests);
+        const test_step = b.step(b.fmt("test-{s}", .{impl.name}), b.fmt("Run lib{s} tests", .{impl.name}));
+        test_step.dependOn(&run_tests.step);
+    }
 }

src/soft/lib.zig

@@ -0,0 +1,7 @@
+const std = @import("std");
+
+const common = @import("common");
+
+test {
+    std.testing.refAllDeclsRecursive(@This());
+}

src/vulkan/Instance.zig

@@ -0,0 +1,9 @@
+const vk = @import("vulkan");
+const Object = @import("object.zig").Object;
+
+pub const Instance = extern struct {
+    const Self = @This();
+    const ObjectType: vk.ObjectType = .instance;
+
+    object: Object,
+};

src/vulkan/PhysicalDevice.zig

@@ -0,0 +1,14 @@
+const vk = @import("vulkan");
+const Instance = @import("Instance.zig").Instance;
+const Object = @import("object.zig").Object;
+
+pub const PhysicalDevice = extern struct {
+    const Self = @This();
+    const ObjectType: vk.ObjectType = .physical_device;
+
+    object: Object,
+
+    instance: *Instance,
+    props: vk.PhysicalDeviceProperties,
+    queue_families: [3]vk.QueueFamilyProperties,
+};

src/vulkan/lib.zig

@@ -0,0 +1,8 @@
+const std = @import("std");
+
+pub const Instance = @import("Instance.zig");
+pub const PhysicalDevice = @import("PhysicalDevice.zig");
+
+test {
+    std.testing.refAllDeclsRecursive(@This());
+}

src/vulkan/object.zig

@@ -0,0 +1,42 @@
+const vk = @import("vulkan");
+const c = @cImport({
+    @cInclude("vulkan/vk_icd.h");
+});
+
+pub const Object = extern struct {
+    const Self = @This();
+
+    loader_data: c.VK_LOADER_DATA,
+    kind: vk.ObjectType,
+    owner: ?*anyopaque,
+    // VK_EXT_debug_utils
+    name: ?[]const u8,
+
+    pub fn init(owner: ?*anyopaque, kind: vk.ObjectType) Self {
+        return .{
+            .loader_data = c.ICD_LOADER_MAGIC,
+            .kind = kind,
+            .owner = owner,
+            .name = null,
+        };
+    }
+};
+
+pub inline fn fromHandle(comptime T: type, comptime VkT: type, handle: VkT) !*T {
+    if (handle == .null_handle) {
+        return error.NullHandle;
+    }
+
+    if (!@hasDecl(T, "object")) {
+        return error.NotAnObject;
+    }
+    if (!@hasDecl(T, "ObjectType") || @TypeOf(T.ObjectType) != vk.ObjectType) {
+        @panic("Object type \"" ++ @typeName(T) ++ "\" is malformed.");
+    }
+
+    const dispatchable: *T = @ptrFromInt(@intFromEnum(handle));
+    if (dispatchable.object.kind != T.ObjectType) {
+        return error.InvalidObjectType;
+    }
+    return dispatchable;
+}