add virtual to support CTFontRef

Bug: skia:6583
Change-Id: I8525e63d3f43467289360d4b15c0153d2a43539e
Reviewed-on: https://skia-review.googlesource.com/15194
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/src/ports/SkFontHost_mac.cpp b/src/ports/SkFontHost_mac.cpp
index 4774eab87f..a43cf22c98 100644
--- a/src/ports/SkFontHost_mac.cpp
+++ b/src/ports/SkFontHost_mac.cpp
@@ -62,6 +62,10 @@
 // Set to make glyph bounding boxes visible.
 #define SK_SHOW_TEXT_BLIT_COVERAGE 0
 
+CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face) {
+    return face ? (CTFontRef)face->internal_private_getCTFontRef() : nullptr;
+}
+
 class SkScalerContext_Mac;
 
 struct CFSafeRelease {
@@ -528,6 +532,8 @@ protected:
                         uint16_t glyphs[], int glyphCount) const override;
     int onCountGlyphs() const override;
 
+    void* onGetCTFontRef() const override { return (void*)fFontRef.get(); }
+
 private:
     bool fIsLocalStream;
 
@@ -536,7 +542,7 @@ private:
 
 static bool find_by_CTFontRef(SkTypeface* cached, void* context) {
     CTFontRef self = (CTFontRef)context;
-    CTFontRef other = ((SkTypeface_Mac*)cached)->fFontRef.get();
+    CTFontRef other = (CTFontRef)cached->internal_private_getCTFontRef();
 
     return CFEqual(self, other);
 }
@@ -653,12 +659,6 @@ static SkTypeface* create_from_name(const char familyName[], const SkFontStyle&
 
 ///////////////////////////////////////////////////////////////////////////////
 
-extern CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face);
-CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face) {
-    const SkTypeface_Mac* macface = (const SkTypeface_Mac*)face;
-    return macface ? macface->fFontRef.get() : nullptr;
-}
-
 /*  This function is visible on the outside. It first searches the cache, and if
  *  not found, returns a new entry (after adding it to the cache).
  */
@@ -779,7 +779,7 @@ SkScalerContext_Mac::SkScalerContext_Mac(sk_sp<SkTypeface_Mac> typeface,
 {
     AUTO_CG_LOCK();
 
-    CTFontRef ctFont = static_cast<SkTypeface_Mac*>(this->getTypeface())->fFontRef.get();
+    CTFontRef ctFont = (CTFontRef)this->getTypeface()->internal_private_getCTFontRef();
     CFIndex numGlyphs = CTFontGetGlyphCount(ctFont);
     SkASSERT(numGlyphs >= 1 && numGlyphs <= 0xFFFF);
     fGlyphCount = SkToU16(numGlyphs);