Font variations.

src/core/SkTypeface.cpp

 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAdvancedTypefaceMetrics.h"
 #include "SkEndian.h"
 #include "SkFontDescriptor.h"
@@ skipping 125 matching lines @@
                                        italic ? SkFontStyle::kItalic_Slant
                                               : SkFontStyle::kUpright_Slant);
     return fm->matchFaceStyle(family, newStyle);
 }
 
 SkTypeface* SkTypeface::CreateFromStream(SkStreamAsset* stream, int index) {
     SkAutoTUnref<SkFontMgr> fm(SkFontMgr::RefDefault());
     return fm->createFromStream(stream, index);
 }
 
+SkTypeface* SkTypeface::CreateFromFontData(SkFontData* data) {
+    SkAutoTUnref<SkFontMgr> fm(SkFontMgr::RefDefault());
+    return fm->createFromFontData(data);
+}
+
 SkTypeface* SkTypeface::CreateFromFile(const char path[], int index) {
     SkAutoTUnref<SkFontMgr> fm(SkFontMgr::RefDefault());
     return fm->createFromFile(path, index);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void SkTypeface::serialize(SkWStream* wstream) const {
     bool isLocal = false;
     SkFontDescriptor desc(this->style());
     this->onGetFontDescriptor(&desc, &isLocal);
 
     // Embed font data if it's a local font.
     if (isLocal && !desc.hasFontData()) {
-        int ttcIndex;
-        desc.setFontData(this->onOpenStream(&ttcIndex));
-        desc.setFontIndex(ttcIndex);
+        desc.setFontData(this->onCreateFontData());
     }
     desc.serialize(wstream);
 }
 
 void SkTypeface::serializeForcingEmbedding(SkWStream* wstream) const {
     bool ignoredIsLocal;
     SkFontDescriptor desc(this->style());
     this->onGetFontDescriptor(&desc, &ignoredIsLocal);
 
     // Always embed font data.
     if (!desc.hasFontData()) {
-        int ttcIndex;
-        desc.setFontData(this->onOpenStream(&ttcIndex));
-        desc.setFontIndex(ttcIndex);
+        desc.setFontData(this->onCreateFontData());
     }
     desc.serialize(wstream);
 }
 
 SkTypeface* SkTypeface::Deserialize(SkStream* stream) {
     SkFontDescriptor desc(stream);
-    SkStreamAsset* data = desc.transferFontData();
+    SkFontData* data = desc.detachFontData();
     if (data) {
-        SkTypeface* typeface = SkTypeface::CreateFromStream(data, desc.getFontIndex());
+        SkTypeface* typeface = SkTypeface::CreateFromFontData(data);
         if (typeface) {
             return typeface;
         }
     }
     return SkTypeface::CreateFromName(desc.getFamilyName(), desc.getStyle());
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 int SkTypeface::countTables() const {
@@ skipping 15 matching lines @@
 
 SkStreamAsset* SkTypeface::openStream(int* ttcIndex) const {
     int ttcIndexStorage;
     if (NULL == ttcIndex) {
         // So our subclasses don't need to check for null param
         ttcIndex = &ttcIndexStorage;
     }
     return this->onOpenStream(ttcIndex);
 }
 
+SkFontData* SkTypeface::createFontData() const {
+    return this->onCreateFontData();
+}
+
+// This implementation is temporary until this method can be made pure virtual.
+SkFontData* SkTypeface::onCreateFontData() const {
+    int index;
+    SkAutoTDelete<SkStreamAsset> stream(this->onOpenStream(&index));
+    return new SkFontData(stream.detach(), index, NULL, 0);
+};
+
 int SkTypeface::charsToGlyphs(const void* chars, Encoding encoding,
                               uint16_t glyphs[], int glyphCount) const {
     if (glyphCount <= 0) {
         return 0;
     }
     if (NULL == chars || (unsigned)encoding > kUTF32_Encoding) {
         if (glyphs) {
             sk_bzero(glyphs, glyphCount * sizeof(glyphs[0]));
         }
         return 0;
@@ skipping 112 matching lines @@
     if (ctx.get()) {
         SkPaint::FontMetrics fm;
         ctx->getFontMetrics(&fm);
         bounds->set(fm.fXMin * invTextSize, fm.fTop * invTextSize,
                     fm.fXMax * invTextSize, fm.fBottom * invTextSize);
         return true;
     }
     return false;
 }