1 files changed, 14 insertions, 4 deletions
diff --git a/markdown/eval.go b/markdown/eval.go
index db9d150..56bb989 100644
--- a/markdown/eval.go
+++ b/markdown/eval.go
@@ -2,15 +2,25 @@ package markdown
 
 import "html/template"
 
-func Parse(s string) (template.HTML, *ParseError) {
+type Option struct {
+	ImageSource func(string) string
+}
+
+func Parse(s string, opt *Option) (template.HTML, *ParseError) {
 	lxs := lex(s)
 	tree, err := ast(lxs)
 	if err != nil {
 		return "", err
 	}
-	return tree.Eval()
+	if opt == nil {
+		opt = new(Option)
+	}
+	if opt.ImageSource == nil {
+		opt.ImageSource = func(s string) string { return s }
+	}
+	return tree.Eval(opt)
 }
 
-func ParseBytes(b []byte) (template.HTML, *ParseError) {
-	return Parse(string(b))
+func ParseBytes(b []byte, opt *Option) (template.HTML, *ParseError) {
+	return Parse(string(b), opt)
 }