Implement support for loading system fonts on Linux, macOS / iOS and Windows.

2 files changed, 76 insertions, 0 deletions

diff --git a/platform/macos/os_macos.h b/platform/macos/os_macos.h
index a6c23ab71e..a1eb0f7f69 100644
--- a/platform/macos/os_macos.h
+++ b/platform/macos/os_macos.h
@@ -97,6 +97,8 @@ public:
 
 	virtual String get_locale() const override;
 
+	virtual Vector<String> get_system_fonts() const override;
+	virtual String get_system_font_path(const String &p_font_name, bool p_bold = false, bool p_italic = false) const override;
 	virtual String get_executable_path() const override;
 	virtual Error create_process(const String &p_path, const List<String> &p_arguments, ProcessID *r_child_id = nullptr, bool p_open_console = false) override;
 	virtual Error create_instance(const List<String> &p_arguments, ProcessID *r_child_id = nullptr) override;
diff --git a/platform/macos/os_macos.mm b/platform/macos/os_macos.mm
index 2c6cd7de0b..cc550043de 100644
--- a/platform/macos/os_macos.mm
+++ b/platform/macos/os_macos.mm
@@ -303,6 +303,80 @@ String OS_MacOS::get_locale() const {
 	return String([locale_code UTF8String]).replace("-", "_");
 }
 
+Vector<String> OS_MacOS::get_system_fonts() const {
+	HashSet<String> font_names;
+	CFArrayRef fonts = CTFontManagerCopyAvailableFontFamilyNames();
+	if (fonts) {
+		for (CFIndex i = 0; i < CFArrayGetCount(fonts); i++) {
+			CFStringRef cf_name = (CFStringRef)CFArrayGetValueAtIndex(fonts, i);
+			if (cf_name && (CFStringGetLength(cf_name) > 0) && (CFStringCompare(cf_name, CFSTR("LastResort"), kCFCompareCaseInsensitive) != kCFCompareEqualTo) && (CFStringGetCharacterAtIndex(cf_name, 0) != '.')) {
+				NSString *ns_name = (__bridge NSString *)cf_name;
+				font_names.insert(String::utf8([ns_name UTF8String]));
+			}
+		}
+		CFRelease(fonts);
+	}
+
+	Vector<String> ret;
+	for (const String &E : font_names) {
+		ret.push_back(E);
+	}
+	return ret;
+}
+
+String OS_MacOS::get_system_font_path(const String &p_font_name, bool p_bold, bool p_italic) const {
+	String ret;
+
+	String font_name = p_font_name;
+	if (font_name.to_lower() == "sans-serif") {
+		font_name = "Helvetica";
+	} else if (font_name.to_lower() == "serif") {
+		font_name = "Times";
+	} else if (font_name.to_lower() == "monospace") {
+		font_name = "Courier";
+	} else if (font_name.to_lower() == "fantasy") {
+		font_name = "Papyrus";
+	} else if (font_name.to_lower() == "cursive") {
+		font_name = "Apple Chancery";
+	};
+
+	CFStringRef name = CFStringCreateWithCString(kCFAllocatorDefault, font_name.utf8().get_data(), kCFStringEncodingUTF8);
+
+	CTFontSymbolicTraits traits = 0;
+	if (p_bold) {
+		traits |= kCTFontBoldTrait;
+	}
+	if (p_italic) {
+		traits |= kCTFontItalicTrait;
+	}
+
+	CFNumberRef sym_traits = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &traits);
+	CFMutableDictionaryRef traits_dict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, nullptr, nullptr);
+	CFDictionaryAddValue(traits_dict, kCTFontSymbolicTrait, sym_traits);
+
+	CFMutableDictionaryRef attributes = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, nullptr, nullptr);
+	CFDictionaryAddValue(attributes, kCTFontFamilyNameAttribute, name);
+	CFDictionaryAddValue(attributes, kCTFontTraitsAttribute, traits_dict);
+
+	CTFontDescriptorRef font = CTFontDescriptorCreateWithAttributes(attributes);
+	if (font) {
+		CFURLRef url = (CFURLRef)CTFontDescriptorCopyAttribute(font, kCTFontURLAttribute);
+		if (url) {
+			NSString *font_path = [NSString stringWithString:[(__bridge NSURL *)url path]];
+			ret = String::utf8([font_path UTF8String]);
+			CFRelease(url);
+		}
+		CFRelease(font);
+	}
+
+	CFRelease(attributes);
+	CFRelease(traits_dict);
+	CFRelease(sym_traits);
+	CFRelease(name);
+
+	return ret;
+}
+
 String OS_MacOS::get_executable_path() const {
 	char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
 	int pid = getpid();