From 7777eed2b60d40915b5f4cc8330b1f5207feb3b3 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Fri, 12 May 2023 01:35:26 +0200
Subject: [PATCH] Add SubtitleAsset::ensure_font().

---
 src/subtitle_asset.cc | 9 +++++++++
 src/subtitle_asset.h  | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/subtitle_asset.cc b/src/subtitle_asset.cc
index d6103a1d..5a448f3f 100644
--- a/src/subtitle_asset.cc
+++ b/src/subtitle_asset.cc
@@ -928,3 +928,12 @@ SubtitleAsset::format_xml(xmlpp::Document const& document, optional<pair<string,
 	return state.xml;
 }
 
+
+void
+SubtitleAsset::ensure_font(string load_id, dcp::ArrayData data)
+{
+	if (std::find_if(_fonts.begin(), _fonts.end(), [load_id](Font const& font) { return font.load_id == load_id; }) == _fonts.end()) {
+		add_font(load_id, data);
+	}
+}
+
diff --git a/src/subtitle_asset.h b/src/subtitle_asset.h
index 28db9574..bc5fa882 100644
--- a/src/subtitle_asset.h
+++ b/src/subtitle_asset.h
@@ -111,6 +111,7 @@ public:
 
 	virtual void add (std::shared_ptr<Subtitle>);
 	virtual void add_font (std::string id, dcp::ArrayData data) = 0;
+	void ensure_font(std::string id, dcp::ArrayData data);
 	std::map<std::string, ArrayData> font_data () const;
 	std::map<std::string, boost::filesystem::path> font_filenames () const;
 
-- 
2.30.2