add backdrop option to SaveLayerRec

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 324 matching lines @@
     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);
 

[robertphillips, 2015/12/15 13:28:38]

dox ?

+    int saveLayerWithPickup(const SkRect* bounds, const SkPaint* paint, SkImageFilter*);
+
     /** 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 1055 matching lines @@
      * Gets the size/origin of the top level layer in global canvas coordinates. We don't want this
      * to be public because it exposes decisions about layer sizes that are internal to the canvas.
      */
     SkISize getTopLayerSize() const;
     SkIPoint getTopLayerOrigin() const;
 
     void internalDrawBitmapRect(const SkBitmap& bitmap, const SkRect* src,
                                 const SkRect& dst, const SkPaint* paint,
                                 SrcRectConstraint);
     void internalDrawPaint(const SkPaint& paint);
-    void internalSaveLayer(const SkRect* bounds, const SkPaint*, SaveFlags, SaveLayerStrategy);
+    void internalSaveLayer(const SkRect* bounds, const SkPaint*, SaveFlags, SaveLayerStrategy,
+                           SkImageFilter*);
     void internalDrawDevice(SkBaseDevice*, int x, int y, const SkPaint*, bool isBitmapDevice);
 
     // shared by save() and saveLayer()
     void internalSave();
     void internalRestore();
     static void DrawRect(const SkDraw& draw, const SkPaint& paint,
                          const SkRect& r, SkScalar textSize);
     static void DrawTextDecorations(const SkDraw& draw, const SkPaint& paint,
                                     const char text[], size_t byteLength,
                                     SkScalar x, SkScalar y);
@@ skipping 145 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