Port new GlyphContext, FontData, enums, props, Bezier and text rendering

ios/Text/TextAnchor.h

@@ -0,0 +1,19 @@
+#import <Foundation/Foundation.h>
+
+#if !defined (TextAnchor_)
+#define TextAnchor_
+
+NS_ENUM(NSInteger, TextAnchor) {
+    TextAnchorStart,
+    TextAnchorMiddle,
+    TextAnchorEnd,
+    TextAnchorDEFAULT = TextAnchorStart,
+};
+
+static NSString* const TextAnchorStrings[] = {@"start", @"middle", @"end", nil};
+
+NSString* TextAnchorToString( enum TextAnchor fw );
+
+enum TextAnchor TextAnchorFromString( NSString* s );
+
+#endif