diff --git a/Telegram/SourceFiles/history/view/history_view_group_call_bar.cpp b/Telegram/SourceFiles/history/view/history_view_group_call_bar.cpp
index 41cf8dcd3a..75abbbd034 100644
--- a/Telegram/SourceFiles/history/view/history_view_group_call_bar.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_group_call_bar.cpp
@@ -83,6 +83,25 @@ bool NeedRegenerateUserpics(
 	return false;
 }
 
+PreparedUserpicsInRow PrepareUserpicsInRow(
+		const std::vector<not_null<PeerData*>> &peers,
+		const style::GroupCallUserpics &st,
+		int limit) {
+	auto rows = std::vector<UserpicInRow>();
+	rows.reserve(peers.size());
+	for (const auto &peer : peers) {
+		rows.push_back({ .peer = peer });
+	}
+	auto result = PreparedUserpicsInRow();
+	if (!rows.empty()) {
+		GenerateUserpicsInRow(result.image, rows, st, limit);
+	}
+	result.width = result.image.isNull()
+		? 0
+		: (result.image.width() / style::DevicePixelRatio());
+	return result;
+}
+
 rpl::producer<Ui::GroupCallBarContent> GroupCallBarContentByCall(
 		not_null<Data::GroupCall*> call,
 		int userpicSize) {
diff --git a/Telegram/SourceFiles/history/view/history_view_group_call_bar.h b/Telegram/SourceFiles/history/view/history_view_group_call_bar.h
index b00d94a1a6..d56a0a0c24 100644
--- a/Telegram/SourceFiles/history/view/history_view_group_call_bar.h
+++ b/Telegram/SourceFiles/history/view/history_view_group_call_bar.h
@@ -41,6 +41,16 @@ void GenerateUserpicsInRow(
 	const QImage &image,
 	const std::vector<UserpicInRow> &list);
 
+struct PreparedUserpicsInRow {
+	QImage image;
+	int width = 0;
+};
+
+[[nodiscard]] PreparedUserpicsInRow PrepareUserpicsInRow(
+	const std::vector<not_null<PeerData*>> &peers,
+	const style::GroupCallUserpics &st,
+	int limit = 0);
+
 [[nodiscard]] auto GroupCallBarContentByCall(
 	not_null<Data::GroupCall*> call,
 	int userpicSize)