Make an HBFont from a CTFontRef. By including ```rive/text/font_hb.hpp``` in iOS you'll get access to ```HBFont::FromSystem``` along with the ```HBFont::Decode``` (which we've been using so far to generate Font objects to put into the fallback list). You can get a UIFont with [this API](https://developer.apple.com/documentation/uikit/uifont/1619027-systemfontofsize?language=objc). You should be able to cast that to a CTFontRef: ``` CTFontRef ctFont = (__bridge CTFontRef)uiFont; auto fallbackFont = HBFont::FromSystem((void*)ctFont); ``` You can then use that in a fallback font procedure (like the example from the editor below) to load on demand/cache/provide from a list etc: https://github.com/rive-app/rive/blob/b5b930f88f18280afa44683c5756066abaa9b1dc/packages/rive_common/macos/rive_text/rive_text.cpp#L153-L175 Diffs= da1bb7745 Make an HBFont from a CTFontRef. (#7661) Co-authored-by: Luigi Rosso <luigi-rosso@users.noreply.github.com>

diff --git a/.rive_head b/.rive_head
index fadf9ed..0ec88f5 100644
--- a/.rive_head
+++ b/.rive_head

@@ -1 +1 @@
-1a5f273bb6534a395d1c3cdcc11a1ba3cd80a96c
+da1bb77455deeafd48012a8eea5ea946a718fb77

diff --git a/build/premake5.lua b/build/premake5.lua
index 52dd2a6..66c7d20 100644
--- a/build/premake5.lua
+++ b/build/premake5.lua

@@ -128,6 +128,11 @@
         objdir('%{cfg.system}_sim/obj/%{cfg.buildcfg}')
     end
 
+    filter('system:macosx or system:ios')
+    do
+        files({ '../src/text/font_hb_apple.mm' })
+    end
+
     filter({ 'system:android', 'configurations:release' })
     do
         buildoptions({ '-flto=full' })

diff --git a/dependencies/premake5_harfbuzz.lua b/dependencies/premake5_harfbuzz.lua
index 1123265..9c16173 100644
--- a/dependencies/premake5_harfbuzz.lua
+++ b/dependencies/premake5_harfbuzz.lua

@@ -349,4 +349,10 @@
         targetdir('%{cfg.system}/cache/arm64/bin/%{cfg.buildcfg}')
         objdir('%{cfg.system}/cache/arm64/obj/%{cfg.buildcfg}')
     end
+
+    filter('system:macosx or system:ios')
+    do
+        defines({'HAVE_CORETEXT'})
+        files({harfbuzz .. '/src/hb-coretext.cc'})
+    end
 end

diff --git a/dependencies/premake5_harfbuzz_v2.lua b/dependencies/premake5_harfbuzz_v2.lua
index 428aa15..9265555 100644
--- a/dependencies/premake5_harfbuzz_v2.lua
+++ b/dependencies/premake5_harfbuzz_v2.lua

@@ -274,4 +274,10 @@
         includedirs({ './' })
         forceincludes({ 'rive_harfbuzz_renames.h' })
     end
+
+    filter('system:macosx or system:ios')
+    do
+        defines({'HAVE_CORETEXT'})
+        files({harfbuzz .. '/src/hb-coretext.cc'})
+    end
 end

diff --git a/dev/test/premake5.lua b/dev/test/premake5.lua
index 318aeba..0cbd906 100644
--- a/dev/test/premake5.lua
+++ b/dev/test/premake5.lua

@@ -62,4 +62,13 @@
         })
         forceincludes({ 'rive_yoga_renames.h' })
     end
+
+    filter({ 'system:macosx'} )
+    do
+        links({
+            'Foundation.framework',
+            'CoreGraphics.framework',
+            'CoreText.framework'
+        })
+    end
 end

diff --git a/include/rive/text/font_hb.hpp b/include/rive/text/font_hb.hpp
index 9534611..ea112b6 100644
--- a/include/rive/text/font_hb.hpp
+++ b/include/rive/text/font_hb.hpp

@@ -32,6 +32,7 @@
     bool hasGlyph(rive::Span<const rive::Unichar>) const override;
 
     static rive::rcp<rive::Font> Decode(rive::Span<const uint8_t>);
+    static rive::rcp<rive::Font> FromSystem(void* systemFont);
     hb_font_t* font() const { return m_font; }
 
 private:

diff --git a/premake5_v2.lua b/premake5_v2.lua
index 3d6c8aa..5abc30e 100644
--- a/premake5_v2.lua
+++ b/premake5_v2.lua

@@ -140,6 +140,11 @@
         architecture('x64')
         defines({ '_USE_MATH_DEFINES' })
     end
+
+    filter('system:macosx or system:ios')
+    do
+        files({ 'src/text/font_hb_apple.mm' })
+    end
 end
 
 newoption({
@@ -177,4 +182,4 @@
 newoption({
     trigger = 'with_rive_layout',
     description = 'Compiles in layout features.',
-})
\ No newline at end of file
+})

diff --git a/src/text/font_hb.cpp b/src/text/font_hb.cpp
index 8bd2324..4c47708 100644
--- a/src/text/font_hb.cpp
+++ b/src/text/font_hb.cpp

@@ -48,6 +48,10 @@
     return nullptr;
 }
 
+#ifndef __APPLE__
+rive::rcp<rive::Font> HBFont::FromSystem(void* systemFont) { return nullptr; }
+#endif
+
 //////////////
 
 constexpr int kStdScale = 2048;

diff --git a/src/text/font_hb_apple.mm b/src/text/font_hb_apple.mm
new file mode 100644
index 0000000..0277d74
--- /dev/null
+++ b/src/text/font_hb_apple.mm

@@ -0,0 +1,18 @@
+#include "rive/text_engine.hpp"
+
+#ifdef WITH_RIVE_TEXT
+#include "rive/text/font_hb.hpp"
+#import <CoreText/CoreText.h>
+
+#include "hb-coretext.h"
+
+rive::rcp<rive::Font> HBFont::FromSystem(void* systemFont)
+{
+    auto font = hb_coretext_font_create((CTFontRef)systemFont);
+    if (font)
+    {
+        return rive::rcp<rive::Font>(new HBFont(font));
+    }
+    return nullptr;
+}
+#endif