From db11935940567444dd230820da9a14acef0c96c2 Mon Sep 17 00:00:00 2001
From: JUN JIE NAN <nanjunjie@gmail.com>
Date: Wed, 12 Jun 2019 14:53:58 +0800
Subject: Added UTF8CutFont

With function `UTF8CutFont`, customized ttf font file(usually with
small size) can be generated via gofpdf.
---
 utf8fontfile.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'utf8fontfile.go')

diff --git a/utf8fontfile.go b/utf8fontfile.go
index 794bae2..07cf169 100644
--- a/utf8fontfile.go
+++ b/utf8fontfile.go
@@ -1138,3 +1138,19 @@ func keySortArrayRangeMap(s map[int][]int) []int {
 	sort.Ints(keys)
 	return keys
 }
+
+// UTF8CutFont cuts a set in cutset and returns the customized font bytes
+// Parameters:
+// in - the ttf bytes in,
+// cutset - the cutset runes in string,
+// Returns:
+// out - the ttf bytes out,
+func UTF8CutFont(in []byte, cutset string) (out []byte) {
+	f := newUTF8Font(&fileReader{readerPosition: 0, array: in})
+	runes := map[int]int{}
+	for i, r := range cutset {
+		runes[i] = int(r)
+	}
+	out = f.GenerateСutFont(runes)
+	return
+}
-- 
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