https://github.com/scribusproject/scribus/commit/1b546978bc4ea0b2a73fbe4d7cf947887e865162.patch
https://github.com/scribusproject/scribus/commit/68ec41169eaceea4a6e1d6f359762a191c7e61d5.patch
https://bugs.scribus.net/view.php?id=16635
https://bugs.gentoo.org/817281
https://bugs.gentoo.org/813711

From 1b546978bc4ea0b2a73fbe4d7cf947887e865162 Mon Sep 17 00:00:00 2001
From: Jean Ghali <jghali@libertysurf.fr>
Date: Sat, 21 Aug 2021 20:05:43 +0000
Subject: [PATCH] Use new hb-subset api with harfbuzz >= 2.9.0 in order to
 prepeare for removal of legacy API in 3.0

git-svn-id: svn://scribus.net/trunk/Scribus@24696 11d20701-8431-0410-a711-e3c959e3b870
---
 scribus/fonts/sfnt.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/scribus/fonts/sfnt.cpp b/scribus/fonts/sfnt.cpp
index 50777f66e3..fca8b39158 100644
--- a/scribus/fonts/sfnt.cpp
+++ b/scribus/fonts/sfnt.cpp
@@ -1256,11 +1256,19 @@ namespace sfnt {
 
 		for (int i = 0; i < cids.count(); ++i)
 			hb_set_add(glyphSet, cids.at(i));
-	
+
+#if HB_VERSION_ATLEAST(2, 9, 0)
+		uint32_t subsetFlags = (uint32_t) hb_subset_input_get_flags(hbSubsetInput.get());
+		subsetFlags |= HB_SUBSET_FLAGS_RETAIN_GIDS;
+		subsetFlags &= ~HB_SUBSET_FLAGS_NO_HINTING;
+		subsetFlags |= HB_SUBSET_FLAGS_NAME_LEGACY;
+		hb_subset_input_set_flags(hbSubsetInput.get(), subsetFlags);
+#else
 		hb_subset_input_set_retain_gids(hbSubsetInput.get(), true);
 		hb_subset_input_set_drop_hints(hbSubsetInput.get(), false);
 #if HB_VERSION_ATLEAST(2, 6, 5)
 		hb_subset_input_set_name_legacy(hbSubsetInput.get(), true);
+#endif
 #endif
 
 		QScopedPointer<hb_face_t, HbFaceDeleter> hbSubsetFace(hb_subset(hbFullFace.get(), hbSubsetInput.get()));

From 68ec41169eaceea4a6e1d6f359762a191c7e61d5 Mon Sep 17 00:00:00 2001
From: Jean Ghali <jghali@libertysurf.fr>
Date: Sun, 19 Sep 2021 11:59:50 +0000
Subject: [PATCH] #16635: Replace hb_subset, removed in harfbuzz 3.0, by
 hb_subset_or_fail

git-svn-id: svn://scribus.net/trunk/Scribus@24707 11d20701-8431-0410-a711-e3c959e3b870
--- a/scribus/fonts/sfnt.cpp
+++ b/scribus/fonts/sfnt.cpp
@@ -1271,9 +1271,15 @@ namespace sfnt {
 #endif
 #endif
 
+#if HB_VERSION_ATLEAST(2, 9, 0)
+		QScopedPointer<hb_face_t, HbFaceDeleter> hbSubsetFace(hb_subset_or_fail(hbFullFace.get(), hbSubsetInput.get()));
+		if (hbSubsetFace.isNull())
+			return QByteArray();
+#else
 		QScopedPointer<hb_face_t, HbFaceDeleter> hbSubsetFace(hb_subset(hbFullFace.get(), hbSubsetInput.get()));
 		if (hbSubsetFace.isNull())
 			return QByteArray();
+#endif
 
 		QScopedPointer<hb_blob_t, HbBlobDeleter> hbSubsetBlob(hb_face_reference_blob(hbSubsetFace.get()));
 		if (hbSubsetBlob.isNull())
