4 files changed, 66 insertions, 0 deletions
diff --git a/hk21/vulkan_loader/BUILD.bazel b/hk21/vulkan_loader/BUILD.bazel
new file mode 100644
index 0000000..8aa55a1
--- /dev/null
+++ b/hk21/vulkan_loader/BUILD.bazel
@@ -0,0 +1,15 @@
+cc_library(
+    name = "vulkan_loader",
+    hdrs = [
+        "api.hpp",
+    ],
+    srcs = [
+        "loader.cpp",
+        "fns.hpp",
+    ],
+    deps = [
+        "//vendor/vulkan",
+        "@asl//asl",
+    ],
+    visibility = ["//:__subpackages__"],
+)
diff --git a/hk21/vulkan_loader/api.hpp b/hk21/vulkan_loader/api.hpp
new file mode 100644
index 0000000..08003e5
--- /dev/null
+++ b/hk21/vulkan_loader/api.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <asl/integers.hpp>
+#include <asl/status.hpp>
+
+#define VK_NO_STDDEF_H
+#define VK_NO_STDINT_H
+#define VK_NO_PROTOTYPES
+#include <vulkan.h>
+
+#include "hk21/vulkan_loader/fns.hpp"
+
+#define FN(NAME) extern PFN_##NAME NAME;
+VULKAN_GLOBAL_FNS
+#undef FN
+
+namespace vulkan_loader
+{
+
+asl::status load_global(PFN_vkGetInstanceProcAddr load_fn);
+
+} // namespace vulkan_loader
+
diff --git a/hk21/vulkan_loader/fns.hpp b/hk21/vulkan_loader/fns.hpp
new file mode 100644
index 0000000..5e35b39
--- /dev/null
+++ b/hk21/vulkan_loader/fns.hpp
@@ -0,0 +1,3 @@
+#define VULKAN_GLOBAL_FNS \
+    FN(vkEnumerateInstanceVersion) \
+    FN(vkCreateInstance)
diff --git a/hk21/vulkan_loader/loader.cpp b/hk21/vulkan_loader/loader.cpp
new file mode 100644
index 0000000..4437282
--- /dev/null
+++ b/hk21/vulkan_loader/loader.cpp
@@ -0,0 +1,25 @@
+#include "hk21/vulkan_loader/api.hpp"
+
+#define FN(NAME) PFN_##NAME NAME;
+VULKAN_GLOBAL_FNS
+#undef FN
+
+asl::status vulkan_loader::load_global(PFN_vkGetInstanceProcAddr load_fn)
+{
+    (void)load_fn;
+    
+    bool has_errors = false;
+    
+#define FN(NAME) \
+    NAME = asl::bit_cast<PFN_##NAME>(load_fn(VK_NULL_HANDLE, #NAME)); \
+    if (NAME == nullptr) \
+    { \
+        ASL_ASSERT(NAME != nullptr); \
+        has_errors = true; \
+    }
+VULKAN_GLOBAL_FNS
+#undef FN
+
+    return has_errors ? asl::runtime_error() : asl::ok();
+}
+