[SkSVGDevice] Full font family support

src/svg/SkSVGDevice.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkSVGDevice.h"
 
 #include "SkBitmap.h"
 #include "SkDraw.h"
 #include "SkPaint.h"
 #include "SkParsePath.h"
 #include "SkPathOps.h"
 #include "SkShader.h"
 #include "SkStream.h"
+#include "SkTArray.h"
 #include "SkTypeface.h"
 #include "SkUtils.h"
 #include "SkXMLWriter.h"
 
 namespace {
 
 static SkString svg_color(SkColor color) {
     return SkStringPrintf("rgb(%u,%u,%u)",
                           SkColorGetR(color),
                           SkColorGetG(color),
@@ skipping 424 matching lines @@
     this->addAttribute("font-size", paint.getTextSize());
 
     SkTypeface::Style style = paint.getTypeface()->style();
     if (style & SkTypeface::kItalic) {
         this->addAttribute("font-style", "italic");
     }
     if (style & SkTypeface::kBold) {
         this->addAttribute("font-weight", "bold");
     }
 
-    SkAutoTUnref<const SkTypeface> tface(paint.getTypeface() ?
-        SkRef(paint.getTypeface()) : SkTypeface::RefDefault(style));
-    SkString familyName;
-    tface->getFamilyName(&familyName);
-    if (!familyName.isEmpty()) {
-        this->addAttribute("font-family", familyName);
-    }
-
     if (const char* textAlign = svg_text_align(paint.getTextAlign())) {
         this->addAttribute("text-anchor", textAlign);
     }
+
+    SkString familyName;
+    SkTArray<SkString> familyNamesSet;
+    SkAutoTUnref<const SkTypeface> tface(paint.getTypeface() ?
+        SkRef(paint.getTypeface()) : SkTypeface::RefDefault(style));
+    SkAutoTUnref<SkTypeface::LocalizedStrings> familyNameIter(tface->createFamilyNameIterator());
+    SkTypeface::LocalizedString familyString;
+    while (familyNameIter->next(&familyString)) {
+        // !!linear search!! In general we expect a small number of names so this should be ok.
+        if (familyNamesSet.rfind(familyString.fString) < 0) {
+            familyNamesSet.push_back() = familyString.fString;
+            familyName.appendf((familyName.isEmpty() ? "%s" : ", %s"),
+                               familyString.fString.c_str());
+        }
+    }
+
+    if (!familyName.isEmpty()) {
+        this->addAttribute("font-family", familyName);
+    }
 }
 
 SkBaseDevice* SkSVGDevice::Create(const SkISize& size, SkXMLWriter* writer) {
     if (!writer) {
         return NULL;
     }
 
     return SkNEW_ARGS(SkSVGDevice, (size, writer));
 }
 
@@ skipping 160 matching lines @@
                                const SkPaint& paint) {
     // todo
     SkDebugf("unsupported operation: drawVertices()\n");
 }
 
 void SkSVGDevice::drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
                              const SkPaint&) {
     // todo
     SkDebugf("unsupported operation: drawDevice()\n");
 }