Hook in rough distance field support for fonts

include/gpu/GrDistanceFieldTextContext.h

Index: include/gpu/GrDistanceFieldTextContext.h
diff --git a/include/gpu/GrBitmapTextContext.h b/include/gpu/GrDistanceFieldTextContext.h
similarity index 63%
copy from include/gpu/GrBitmapTextContext.h
copy to include/gpu/GrDistanceFieldTextContext.h
index e0900ecd7d625629418dd26e29a40d6617070bee..217faf3cb0213eaed917a5c5a56bef9b02800af6 100755
--- a/include/gpu/GrBitmapTextContext.h
+++ b/include/gpu/GrDistanceFieldTextContext.h
@@ -5,27 +5,27 @@
  * found in the LICENSE file.
  */
 
-#ifndef GrBitmapTextContext_DEFINED
-#define GrBitmapTextContext_DEFINED
+#ifndef GrDistanceFieldTextContext_DEFINED
+#define GrDistanceFieldTextContext_DEFINED
 
 #include "GrTextContext.h"
 
 class GrTextStrike;
 
 /*
- * This class implements GrTextContext using standard bitmap fonts
+ * This class implements GrTextContext using distance field fonts
  */
-class GrBitmapTextContext : public GrTextContext {
+class GrDistanceFieldTextContext : public GrTextContext {
 public:
-    GrBitmapTextContext(GrContext*, const GrPaint&, SkColor);
-    virtual ~GrBitmapTextContext();
+    GrDistanceFieldTextContext(GrContext*, const GrPaint&, SkColor, SkScalar textRatio);
+    virtual ~GrDistanceFieldTextContext();
 
     virtual void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top,
-                         GrFontScaler*) SK_OVERRIDE;
+                                 GrFontScaler*) SK_OVERRIDE;
 
 private:
-    GrContext::AutoMatrix  fAutoMatrix;
-    GrTextStrike*          fStrike;
+    GrTextStrike*           fStrike;
+    SkScalar                fTextRatio;
 
     void flushGlyphs();                 // automatically called by destructor