Switch to HarfBuzz on Mac and remove CoreText shaper

Source/platform/fonts/cocoa/FontPlatformDataCocoa.mm

 /*
  * This file is part of the internal font implementation.
  *
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (c) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 10 matching lines @@
  *
  */
 
 #import "config.h"
 #import "platform/fonts/FontPlatformData.h"
 
 #import <AppKit/NSFont.h>
 #import <AvailabilityMacros.h>
 #import <wtf/text/WTFString.h>
 
+#include "platform/LayoutTestSupport.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #import "platform/fonts/harfbuzz/HarfBuzzFace.h"
 #include "third_party/skia/include/ports/SkTypeface_mac.h"
 
+
+
 namespace blink {
 
 unsigned FontPlatformData::hash() const
 {
     ASSERT(m_font || !m_cgFont);
     uintptr_t hashCodes[3] = { (uintptr_t)m_font, m_widthVariant, static_cast<uintptr_t>(m_isHashTableDeletedValue << 3 | m_orientation << 2 | m_syntheticBold << 1 | m_syntheticItalic) };
     return StringHasher::hashMemory<sizeof(hashCodes)>(hashCodes);
 }
 
+void FontPlatformData::setupPaint(SkPaint* paint, GraphicsContext*) const
+{
+    bool shouldSmoothFonts = true;
+    bool shouldAntialias = true;
+
+    shouldAntialias = shouldAntialias && (!LayoutTestSupport::isRunningLayoutTest() || LayoutTestSupport::isFontAntialiasingEnabledForTest());

[eae, 2014/09/26 14:32:08]

Nit: you might want to wrap this line.

+    bool useSubpixelText = RuntimeEnabledFeatures::subpixelFontScalingEnabled();
+    shouldSmoothFonts = shouldSmoothFonts && !LayoutTestSupport::isRunningLayoutTest();
+
+    paint->setAntiAlias(shouldAntialias);
+    paint->setEmbeddedBitmapText(false);
+    const float ts = m_textSize >= 0 ? m_textSize : 12;
+    paint->setTextSize(SkFloatToScalar(ts));
+    paint->setTypeface(typeface());
+    paint->setFakeBoldText(m_syntheticBold);
+    paint->setTextSkewX(m_syntheticItalic ? -SK_Scalar1 / 4 : 0);
+    paint->setAutohinted(false); // freetype specific
+    paint->setLCDRenderText(shouldSmoothFonts);
+    paint->setSubpixelText(useSubpixelText);
+    paint->setHinting(SkPaint::kNo_Hinting);
+}
+
 // These CoreText Text Spacing feature selectors are not defined in CoreText.
 enum TextSpacingCTFeatureSelector { TextSpacingProportional, TextSpacingFullWidth, TextSpacingHalfWidth, TextSpacingThirdWidth, TextSpacingQuarterWidth };
 
 FontPlatformData::FontPlatformData(NSFont *nsFont, float size, bool syntheticBold, bool syntheticItalic, FontOrientation orientation, FontWidthVariant widthVariant)
     : m_textSize(size)
     , m_syntheticBold(syntheticBold)
     , m_syntheticItalic(syntheticItalic)
     , m_orientation(orientation)
     , m_isColorBitmapFont(false)
     , m_isCompositeFontReference(false)
@@ skipping 204 matching lines @@
         RetainPtr<CTFontDescriptorRef> newDescriptor(AdoptCF, CTFontDescriptorCreateCopyWithFeature(sourceDescriptor.get(), featureType.get(), featureSelector.get()));
         RetainPtr<CTFontRef> newFont(AdoptCF, CTFontCreateWithFontDescriptor(newDescriptor.get(), m_textSize, 0));
 
         if (newFont)
             m_CTFont = newFont;
     }
 
     return m_CTFont.get();
 }
 
-bool FontPlatformData::isAATFont(CTFontRef ctFont) const
-{
-    CFDataRef table = CTFontCopyTable(ctFont, kCTFontTableMort, 0);
-    if (table) {
-        CFRelease(table);
-        return true;
-    }
-    table = CTFontCopyTable(ctFont, kCTFontTableMorx, 0);
-    if (table) {
-        CFRelease(table);
-        return true;
-    }
-    return false;
-}
-
 } // namespace blink