[SkTextBlob] Merge run font data at draw time.

src/core/SkTextBlob.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTextBlob.h"
 
 SkTextBlob::SkTextBlob(uint16_t *glyphs, SkScalar *pos, const SkTArray<Run> *runs,
@@ skipping 43 matching lines @@
 const SkScalar* SkTextBlob::RunIterator::pos() const {
     SkASSERT(!this->done());
     return fBlob->fPosBuffer.get() + (*fBlob->fRuns)[fIndex].posStart;
 }
 
 const SkPoint& SkTextBlob::RunIterator::offset() const {
     SkASSERT(!this->done());
     return (*fBlob->fRuns)[fIndex].offset;
 }
 
-const SkPaint& SkTextBlob::RunIterator::font() const {
-    SkASSERT(!this->done());
-    return (*fBlob->fRuns)[fIndex].font;
-}
-
 SkTextBlob::GlyphPositioning SkTextBlob::RunIterator::positioning() const {
     SkASSERT(!this->done());
     return (*fBlob->fRuns)[fIndex].positioning;
 }
 
+void SkTextBlob::RunIterator::applyFontToPaint(SkPaint* paint) const {
+    SkASSERT(!this->done());
+
+    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));

[reed1, 2014/08/22 15:36:41]

Does font.getFlags() return equivalent bit flags to paint? I think this process
will be more complicated (unfortunately).

+}
+
 SkTextBlobBuilder::SkTextBlobBuilder(unsigned runs)
     : fRuns(NULL)
     , fDeferredBounds(false) {
 
     if (runs > 0) {
         // if the number of runs is known, size our run storage accordingly.
         fRuns = SkNEW(SkTArray<SkTextBlob::Run>(runs));
     }
     fBounds.setEmpty();
 }
@@ skipping 128 matching lines @@
         // empty blob
         SkASSERT(NULL == fRuns || fRuns->empty());
         SkASSERT(fBounds.isEmpty());
 
         blob = SkNEW_ARGS(SkTextBlob, (NULL, NULL, NULL, SkRect::MakeEmpty()));
     }
 
     return blob;
 }