Skia Filter Quality and Scaling Metrics

include/core/SkDevice.h

 /*
  * Copyright 2010 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 SkDevice_DEFINED
 #define SkDevice_DEFINED
 
@@ skipping 369 matching lines @@
     virtual SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) {
         return NULL;
     }
 
     /**
      *  Calls through to drawSprite, processing the imagefilter.
      */
     virtual void drawSpriteWithFilter(const SkDraw&, const SkBitmap&,
                                       int x, int y, const SkPaint&);
 
+    // A helper function used by derived classes to log the scale factor of a bitmap or image draw.
+    static void LogDrawScaleFactor(const SkMatrix&, SkFilterQuality);
+
 private:
     friend class SkCanvas;
     friend struct DeviceCM; //for setMatrixClip
     friend class SkDraw;
     friend class SkDrawIter;
     friend class SkDeviceFilteredPaint;
     friend class SkImageFilter::DeviceProxy;
     friend class SkNoPixelsBitmapDevice;
     friend class SkSurface_Raster;
 
@@ skipping 19 matching lines @@
     SkSurfaceProps fSurfaceProps;
 
 #ifdef SK_DEBUG
     bool        fAttachedToCanvas;
 #endif
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif