Working plumb of image scaling:

src/core/SkBitmapProcState_matrixProcs.cpp

 /* NEON optimized code (C) COPYRIGHT 2009 Motorola
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcState.h"
 #include "SkPerspIter.h"
 #include "SkShader.h"
 #include "SkUtils.h"
@@ skipping 467 matching lines @@
             case SkShader::kClamp_TileMode:
                 return clampx_nofilter_trans;
             case SkShader::kRepeat_TileMode:
                 return repeatx_nofilter_trans;
             case SkShader::kMirror_TileMode:
                 return mirrorx_nofilter_trans;
         }
     }
 
     int index = 0;
-    if (fDoFilter) {
+    if (fFilterQuality != kNone_BitmapFilter) {
         index = 1;
     }
     if (fInvType & SkMatrix::kPerspective_Mask) {
         index += 4;
     } else if (fInvType & SkMatrix::kAffine_Mask) {
         index += 2;
     }
 
     if (SkShader::kClamp_TileMode == fTileModeX &&
         SkShader::kClamp_TileMode == fTileModeY)
@@ skipping 13 matching lines @@
     {
         return SK_ARM_NEON_WRAP(RepeatX_RepeatY_Procs)[index];
     }
 
     fTileProcX = choose_tile_proc(fTileModeX);
     fTileProcY = choose_tile_proc(fTileModeY);
     fTileLowBitsProcX = choose_tile_lowbits_proc(fTileModeX);
     fTileLowBitsProcY = choose_tile_lowbits_proc(fTileModeY);
     return GeneralXY_Procs[index];
 }