try adding flag to allow lcd text even in a layer

include/core/SkCanvas.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 318 matching lines @@
                       happen. If exact clipping is desired, use clipRect().
         @param paint (may be null) This is copied, and is applied to the
                      offscreen when restore() is called
         @return The value to pass to restoreToCount() to balance this save()
     */
     int saveLayer(const SkRect* bounds, const SkPaint* paint);
     int saveLayer(const SkRect& bounds, const SkPaint* paint) {
         return this->saveLayer(&bounds, paint);
     }
 
+    /**
+     *  Temporary name.
+     *  Will allow any requests for LCD text to be respected, so the caller must be careful to
+     *  only draw on top of opaque sections of the layer to get good results.
+     */
+    int saveLayerPreserveLCDTextRequests(const SkRect* bounds, const SkPaint* paint);
+
     /** DEPRECATED - use saveLayer(const SkRect*, const SkPaint*) instead.
 
         This behaves the same as saveLayer(const SkRect*, const SkPaint*),
         but it allows fine-grained control of which state bits to be saved
         (and subsequently restored).
 
         @param bounds (may be null) This rect, if non-null, is used as a hint to
                       limit the size of the offscreen, and thus drawing may be
                       clipped to it, though that clipping is not guaranteed to
                       happen. If exact clipping is desired, use clipRect().
@@ skipping 960 matching lines @@
 
     // Clip rectangle bounds. Called internally by saveLayer.
     // returns false if the entire rectangle is entirely clipped out
     // If non-NULL, The imageFilter parameter will be used to expand the clip
     // and offscreen bounds for any margin required by the filter DAG.
     bool clipRectBounds(const SkRect* bounds, SaveFlags flags,
                         SkIRect* intersection,
                         const SkImageFilter* imageFilter = NULL);
 
 private:
+    enum PrivateSaveFlags {
+        // These must not overlap the public flags.
+        kPreserveLCDText_PrivateSaveFlag = 1 << 5,
+    };
+
     enum ShaderOverrideOpacity {
         kNone_ShaderOverrideOpacity,        //!< there is no overriding shader (bitmap or image)
         kOpaque_ShaderOverrideOpacity,      //!< the overriding shader is opaque
         kNotOpaque_ShaderOverrideOpacity,   //!< the overriding shader may not be opaque
     };
 
     // notify our surface (if we have one) that we are about to draw, so it
     // can perform copy-on-write or invalidate any cached images
     void predrawNotify(bool willOverwritesEntireSurface = false);
     void predrawNotify(const SkRect* rect, const SkPaint* paint, ShaderOverrideOpacity);
@@ skipping 236 matching lines @@
 
 class SkCanvasClipVisitor {
 public:
     virtual ~SkCanvasClipVisitor();
     virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipRRect(const SkRRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0;
 };
 
 #endif