init commit

purego_windows.go

@@ -0,0 +1,34 @@
+//go:build (!cgo || nocgo) && windows
+
+package fitz
+
+import (
+	"fmt"
+	"syscall"
+
+	"golang.org/x/sys/windows"
+)
+
+const (
+	libname = "libmupdf.dll"
+)
+
+// loadLibrary loads the dll and panics on error.
+func loadLibrary() uintptr {
+	handle, err := syscall.LoadLibrary(libname)
+	if err != nil {
+		panic(fmt.Errorf("cannot load library %s: %w", libname, err))
+	}
+
+	return uintptr(handle)
+}
+
+// procAddress returns the address of symbol name.
+func procAddress(handle uintptr, procName string) uintptr {
+	addr, err := windows.GetProcAddress(windows.Handle(handle), procName)
+	if err != nil {
+		panic(fmt.Errorf("cannot get proc address for %s: %w", procName, err))
+	}
+
+	return addr
+}