Add fallback code for TextContexts that don't support all features

include/gpu/GrBitmapTextContext.h

Index: include/gpu/GrBitmapTextContext.h
diff --git a/include/gpu/GrBitmapTextContext.h b/include/gpu/GrBitmapTextContext.h
index c66f8a856431343042679e8d33d8b4ae615dc70a..bb9891e1a6312184abff259c9cbaf2035a1b7d3a 100755
--- a/include/gpu/GrBitmapTextContext.h
+++ b/include/gpu/GrBitmapTextContext.h
@@ -10,6 +10,8 @@
 
 #include "GrTextContext.h"
 
+#include "SkDraw.h"
+
 class GrTextStrike;
 
 /*
@@ -17,16 +19,19 @@ class GrTextStrike;
  */
 class GrBitmapTextContext : public GrTextContext {
 public:
+    GrBitmapTextContext(GrContext*, const GrPaint&, const SkPaint&, const SkDeviceProperties&);
+    virtual ~GrBitmapTextContext();
+
     virtual void drawText(const char text[], size_t byteLength, SkScalar x, SkScalar y) SK_OVERRIDE;
     virtual void drawPosText(const char text[], size_t byteLength,
                              const SkScalar pos[], SkScalar constY,
                              int scalarsPerPosition) SK_OVERRIDE;
 
-private:
-    GrBitmapTextContext(GrContext*, const GrPaint&, const SkPaint&, const SkDeviceProperties&);
-    virtual ~GrBitmapTextContext();
-    friend class GrTTextContextManager<GrBitmapTextContext>;
+    static bool CanDraw(const SkPaint& paint, const SkMatrix& ctm) { 
+        return !SkDraw::ShouldDrawTextAsPaths(paint, ctm);

[reed1, 2014/01/29 17:18:56]

If we move this impl into the .cpp, can we not add SkDraw.h to the #include? I
would like to make SkDraw.h private someday.

[jvanverth1, 2014/01/29 19:25:59]

Done.

+    }
 
+private:
     GrTextStrike*          fStrike;
 
     void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top, GrFontScaler*);