Use Elegant fonts for Webkit, Compact fonts for Textview

    Fonts can be marked with elegant or compact in fallback_fonts.xml.
Webkit uses elegant fonts, Textview uses compact fonts (the default),
unmarked fonts are used by both.

    Bug: 6649136

Change-Id: I6ab6173c2efc50eba8fcc488c89dfdd083fb9c06

4 files changed, 41 insertions, 37 deletions

diff --git a/include/core/SkFontHost.h b/include/core/SkFontHost.h
index 25c9ecb..ace08d8 100644
--- a/include/core/SkFontHost.h
+++ b/include/core/SkFontHost.h
@@ -154,6 +154,15 @@ public:
      */
     static SkFontID NextLogicalFont(SkFontID currFontID, SkFontID origFontID);
 
+#ifdef SK_BUILD_FOR_ANDROID
+    /*
+     * This Android-only version of NextLogicalFont allows us to pass in an
+     * entire Rec structure so that a caller can change fallback behavior
+     */
+    static SkFontID NextLogicalFont(const SkScalerContext::Rec& rec);
+#endif
+
+
     ///////////////////////////////////////////////////////////////////////////
 
     /** Given a filled-out rec, the fonthost may decide to modify it to reflect
diff --git a/include/core/SkPaint.h b/include/core/SkPaint.h
index 30ff663..1715013 100644
--- a/include/core/SkPaint.h
+++ b/include/core/SkPaint.h
@@ -665,6 +665,25 @@ public:
         @param locale set the paint's locale value for drawing text.
     */
     void    setTextLocale(const SkString& locale);
+
+
+    enum FontVariant {
+       kDefault_Variant, // Currently setting yourself to Default gives you Compact Variant
+       kCompact_Variant,
+       kElegant_Variant,
+       kLast_Variant = kElegant_Variant,
+    };
+
+    /** Return the font variant
+        @return the font variant used by this paint object
+    */
+    FontVariant getFontVariant() const { return fFontVariant; }
+
+
+    /** Set the font variant
+      @param fontVariant set the paint's font variant for choosing fonts
+    */
+    void setFontVariant(FontVariant fontVariant);
 #endif
 
     /** Return the paint's text size.
@@ -906,6 +925,7 @@ private:
     unsigned        fHinting : 2;
 #ifdef SK_BUILD_FOR_ANDROID
     SkString        fTextLocale;
+    FontVariant     fFontVariant;
 #endif
 
     SkDrawCacheProc    getDrawCacheProc() const;
diff --git a/include/core/SkScalerContext.h b/include/core/SkScalerContext.h
index 9bcf601..33c3c3d 100644
--- a/include/core/SkScalerContext.h
+++ b/include/core/SkScalerContext.h
@@ -210,6 +210,9 @@ public:
 #ifdef SK_USE_COLOR_LUMINANCE
         uint32_t    fLumBits;
 #endif
+#ifdef SK_BUILD_FOR_ANDROID
+        SkPaint::FontVariant fFontVariant;
+#endif
         uint8_t     fMaskFormat;
         uint8_t     fStrokeJoin;
         uint16_t    fFlags;
@@ -234,7 +237,6 @@ public:
         SkMask::Format getFormat() const {
             return static_cast<SkMask::Format>(fMaskFormat);
         }
-        
 #ifdef SK_USE_COLOR_LUMINANCE
         SkColor getLuminanceColor() const {
             return fLumBits;
diff --git a/include/ports/SkTypeface_android.h b/include/ports/SkTypeface_android.h
index 3471a94..c3eb3d1 100644
--- a/include/ports/SkTypeface_android.h
+++ b/include/ports/SkTypeface_android.h
@@ -10,47 +10,20 @@
 #define SkTypeface_android_DEFINED
 
 #include "SkTypeface.h"
+#include "SkPaint.h"
 
-enum FallbackScripts {
-    kArabic_FallbackScript,
-    kArmenian_FallbackScript,
-    kBengali_FallbackScript,
-    kDevanagari_FallbackScript,
-    kEthiopic_FallbackScript,
-    kGeorgian_FallbackScript,
-    kHebrewRegular_FallbackScript,
-    kHebrewBold_FallbackScript,
-    kKannada_FallbackScript,
-    kMalayalam_FallbackScript,
-    kTamilRegular_FallbackScript,
-    kTamilBold_FallbackScript,
-    kThai_FallbackScript,
-    kTelugu_FallbackScript,
-    kFallbackScriptNumber
-};
-
-#define SkTypeface_ValidScript(s) (s >= 0 && s < kFallbackScriptNumber)
+#include "../harfbuzz/src/harfbuzz-shaper.h"
 
 /**
  *  Return a new typeface for a fallback script. If the script is
  *  not valid, or can not map to a font, returns null.
- *  @param  script  The script id.
- *  @return reference to the matching typeface. Caller must call
- *          unref() when they are done.
- */
-SK_API SkTypeface* SkCreateTypefaceForScript(FallbackScripts script);
-
-/**
- *  Return the string representation for the fallback script on Android.
- *  If the script is not valid, returns null.
- */
-SK_API const char* SkGetFallbackScriptID(FallbackScripts script);
-
-/**
- *  Return the fallback script enum for the ID on Android.
- *  If the ID is not valid, or can not map to a fallback
- *  script, returns kFallbackScriptNumber.
+ *  @param  script   The harfbuzz script id.
+ *  @param  style    The font style, for example bold
+ *  @param  elegant  true if we want the web friendly elegant version of the font
+ *  @return          reference to the matching typeface. Caller must call
+ *                   unref() when they are done.
  */
-SK_API FallbackScripts SkGetFallbackScriptFromID(const char* id);
+SK_API SkTypeface* SkCreateTypefaceForScript(HB_Script script, SkTypeface::Style style,
+        SkPaint::FontVariant fontVariant = SkPaint::kDefault_Variant);
 
 #endif