vendor raymenu dependencies

raymenu/vendor/github.com/gen2brain/raylib-go/raylib/purego_windows.go

@@ -0,0 +1,61 @@
+//go:build !cgo && windows
+// +build !cgo,windows
+
+package rl
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+
+	"github.com/ebitengine/purego"
+	"golang.org/x/sys/windows"
+)
+
+const (
+	libname         = "raylib.dll"
+	requiredVersion = "5.5"
+)
+
+var wvsprintfA uintptr
+
+func init() {
+	handle, err := windows.LoadLibrary("user32.dll")
+	if err == nil {
+		wvsprintfA, _ = windows.GetProcAddress(handle, "wvsprintfA")
+	}
+}
+
+// loadLibrary loads the raylib dll and panics on error
+func loadLibrary() uintptr {
+	handle, err := windows.LoadLibrary(libname)
+	if err != nil {
+		panic(fmt.Errorf("cannot load library %s: %w", libname, err))
+	}
+
+	proc, err := windows.GetProcAddress(handle, "raylib_version")
+	if err != nil {
+		panic(err)
+	}
+
+	version := windows.BytePtrToString(**(***byte)(unsafe.Pointer(&proc)))
+	if version != requiredVersion {
+		panic(fmt.Errorf("version %s of %s doesn't match the required version %s", version, libname, requiredVersion))
+	}
+
+	return uintptr(handle)
+}
+
+func traceLogCallbackWrapper(fn TraceLogCallbackFun) uintptr {
+	return purego.NewCallback(func(logLevel int32, text *byte, args unsafe.Pointer) uintptr {
+		if wvsprintfA != 0 {
+			var buffer [1024]byte // Max size is 1024 (see https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-wvsprintfa)
+			_, _, errno := syscall.SyscallN(wvsprintfA, uintptr(unsafe.Pointer(&buffer[0])), uintptr(unsafe.Pointer(text)), uintptr(args))
+			if errno == 0 {
+				text = &buffer[0]
+			}
+		}
+		fn(int(logLevel), windows.BytePtrToString(text))
+		return 0
+	})
+}