[SkTextBlob] Merge run font data at draw time.

src/core/SkTextBlob.cpp

Index: src/core/SkTextBlob.cpp
diff --git a/src/core/SkTextBlob.cpp b/src/core/SkTextBlob.cpp
index 551d98836a3e40ea172a07e573de30dde9966756..157321b00cfbc6c8764cfbb329c38ad8eea74e40 100644
--- a/src/core/SkTextBlob.cpp
+++ b/src/core/SkTextBlob.cpp
@@ -61,14 +61,38 @@ const SkPoint& SkTextBlob::RunIterator::offset() const {
     return (*fBlob->fRuns)[fIndex].offset;
 }
 
-const SkPaint& SkTextBlob::RunIterator::font() const {
+SkTextBlob::GlyphPositioning SkTextBlob::RunIterator::positioning() const {
     SkASSERT(!this->done());
-    return (*fBlob->fRuns)[fIndex].font;
+    return (*fBlob->fRuns)[fIndex].positioning;
 }
 
-SkTextBlob::GlyphPositioning SkTextBlob::RunIterator::positioning() const {
+void SkTextBlob::RunIterator::applyFont(SkPaint& paint) const {
     SkASSERT(!this->done());
-    return (*fBlob->fRuns)[fIndex].positioning;
+
+    const SkPaint& font = (*fBlob->fRuns)[fIndex].font;
+
+    paint.setTypeface(font.getTypeface());
+    paint.setTextEncoding(font.getTextEncoding());
+    paint.setTextSize(font.getTextSize());
+    paint.setTextScaleX(font.getTextScaleX());
+    paint.setTextSkewX(font.getTextSkewX());
+    paint.setHinting(font.getHinting());
+
+    uint32_t flagsMask = SkPaint::kAntiAlias_Flag
+                       | SkPaint::kUnderlineText_Flag
+                       | SkPaint::kStrikeThruText_Flag
+                       | SkPaint::kFakeBoldText_Flag
+                       | SkPaint::kLinearText_Flag
+                       | SkPaint::kSubpixelText_Flag
+                       | SkPaint::kDevKernText_Flag
+                       | SkPaint::kLCDRenderText_Flag
+                       | SkPaint::kEmbeddedBitmapText_Flag
+                       | SkPaint::kAutoHinting_Flag
+                       | SkPaint::kVerticalText_Flag
+                       | SkPaint::kGenA8FromLCD_Flag
+                       | SkPaint::kDistanceFieldTextTEMP_Flag;
+    paint.setFlags((paint.getFlags() & ~flagsMask) | (font.getFlags() & flagsMask));
+
 }
 
 SkTextBlobBuilder::SkTextBlobBuilder(unsigned runs)