wip for drawables

src/core/SkRecordDraw.h

Index: src/core/SkRecordDraw.h
diff --git a/src/core/SkRecordDraw.h b/src/core/SkRecordDraw.h
index 9b39dd6adb903ab534ada47194af2ff11a601d07..8ea1bbd72fdc79e9fc63b488f31ba917512a4729 100644
--- a/src/core/SkRecordDraw.h
+++ b/src/core/SkRecordDraw.h
@@ -23,14 +23,17 @@ void SkRecordComputeLayers(const SkRect& cullRect, const SkRecord& record,
                            SkBBoxHierarchy* bbh, SkLayerInfo* data);
 
 // Draw an SkRecord into an SkCanvas.  A convenience wrapper around SkRecords::Draw.
-void SkRecordDraw(const SkRecord&, SkCanvas*, const SkBBoxHierarchy*, SkDrawPictureCallback*);
+void SkRecordDraw(const SkRecord&, SkCanvas*, SkPicture const* const drawablePicts[], int drawableCount,
+                  const SkBBoxHierarchy*, SkDrawPictureCallback*);
 
 // Draw a portion of an SkRecord into an SkCanvas while replacing clears with drawRects.
 // When drawing a portion of an SkRecord the CTM on the passed in canvas must be
 // the composition of the replay matrix with the record-time CTM (for the portion
 // of the record that is being replayed). For setMatrix calls to behave correctly
 // the initialCTM parameter must set to just the replay matrix.
-void SkRecordPartialDraw(const SkRecord&, SkCanvas*, const SkRect&, unsigned start, unsigned stop,
+void SkRecordPartialDraw(const SkRecord&, SkCanvas*,
+                         SkPicture const* const drawablePicts[], int drawableCount,
+                         const SkRect&, unsigned start, unsigned stop,
                          const SkMatrix& initialCTM);
 
 namespace SkRecords {
@@ -38,9 +41,13 @@ namespace SkRecords {
 // This is an SkRecord visitor that will draw that SkRecord to an SkCanvas.
 class Draw : SkNoncopyable {
 public:
-    explicit Draw(SkCanvas* canvas, const SkMatrix* initialCTM = NULL)
+    explicit Draw(SkCanvas* canvas, SkPicture const* const drawablePicts[], int drawableCount,
+                  const SkMatrix* initialCTM = NULL)
         : fInitialCTM(initialCTM ? *initialCTM : canvas->getTotalMatrix())
-        , fCanvas(canvas) {}
+        , fCanvas(canvas)
+        , fDrawablePicts(drawablePicts)
+        , fDrawableCount(drawableCount)
+    {}
 
     // This operator calls methods on the |canvas|. The various draw() wrapper
     // methods around SkCanvas are defined by the DRAW() macro in
@@ -49,19 +56,26 @@ public:
         this->draw(r);
     }
 
+protected:
+    SkPicture const* const* drawablePicts() const { return fDrawablePicts; }
+    int drawableCount() const { return fDrawableCount; }
+
 private:
     // No base case, so we'll be compile-time checked that we implement all possibilities.
     template <typename T> void draw(const T&);
 
     const SkMatrix fInitialCTM;
     SkCanvas* fCanvas;
+    SkPicture const* const* fDrawablePicts;
+    int fDrawableCount;
 };
 
 // Used by SkRecordPartialDraw.
 class PartialDraw : public Draw {
 public:
-    PartialDraw(SkCanvas* canvas, const SkRect& clearRect, const SkMatrix& initialCTM)
-        : INHERITED(canvas, &initialCTM), fClearRect(clearRect) {}
+    PartialDraw(SkCanvas* canvas, SkPicture const* const drawablePicts[], int drawableCount,
+                const SkRect& clearRect, const SkMatrix& initialCTM)
+        : INHERITED(canvas, drawablePicts, drawableCount, &initialCTM), fClearRect(clearRect) {}
 
     // Same as Draw for all ops except Clear.
     template <typename T> void operator()(const T& r) {