build: replace FreeType back-compat sed with a patch in qt package

1 files changed, 28 insertions, 0 deletions

diff --git a/depends/patches/qt/freetype_back_compat.patch b/depends/patches/qt/freetype_back_compat.patch
new file mode 100644
index 0000000000..b0f1c98aa6
--- /dev/null
+++ b/depends/patches/qt/freetype_back_compat.patch
@@ -0,0 +1,28 @@
+commit 14bc77db61bf9d56f9b6c8b84aa02573605c19c6
+Author: fanquake <fanquake@gmail.com>
+Date:   Tue Aug 18 15:15:08 2020 +0800
+
+    Fix backwards compatibility with older Freetype versions at runtime
+
+    A few years ago, libfreetype introduced FT_Get_Font_Format() as an alias
+    for FT_Get_X11_Font_Format(), but FT_Get_X11_Font_Format() was kept for abi
+    backwards-compatibility.
+
+    Qt 5.9 introduced a call to FT_Get_Font_Format(). Replace it with FT_Get_X11_Font_Format()
+    in order to remain compatibile with older freetype, which is still used by e.g. Ubuntu Trusty.
+
+    See #14348.
+
+diff --git a/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp b/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
+index 3f543755..8ecc1c8c 100644
+--- a/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
++++ b/qtbase/src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
+@@ -898,7 +898,7 @@ bool QFontEngineFT::init(FaceId faceId, bool antialias, GlyphFormat format,
+         }
+     }
+ #if defined(FT_FONT_FORMATS_H)
+-    const char *fmt = FT_Get_Font_Format(face);
++    const char *fmt = FT_Get_X11_Font_Format(face);
+     if (fmt && qstrncmp(fmt, "CFF", 4) == 0) {
+         FT_Bool no_stem_darkening = true;
+         FT_Error err = FT_Property_Get(qt_getFreetype(), "cff", "no-stem-darkening", &no_stem_darkening);