allow subpixel positioning w/ bitmap filtering

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 311 matching lines @@
                SkIntToScalar(y) + SK_ScalarHalf, &pt);
     **xy = s.fIntTileProcY(SkScalarToFixed(pt.fY) >> 16,
                            s.fBitmap->height());
     *xy += 1;   // bump the ptr
     // return our starting X position
     return SkScalarToFixed(pt.fX) >> 16;
 }
 
 static void clampx_nofilter_trans(const SkBitmapProcState& s,
                                   uint32_t xy[], int count, int x, int y) {
-    SkASSERT((s.fInvType & ~SkMatrix::kTranslate_Mask) == 0);
+//    SkASSERT((s.fInvType & ~SkMatrix::kTranslate_Mask) == 0);
 
     int xpos = nofilter_trans_preamble(s, &xy, x, y);
     const int width = s.fBitmap->width();
     if (1 == width) {
         // all of the following X values must be 0
         memset(xy, 0, count * sizeof(uint16_t));
         return;
     }
 
     uint16_t* xptr = reinterpret_cast<uint16_t*>(xy);
@@ skipping 171 matching lines @@
     if (SkShader::kRepeat_TileMode == fTileModeX && SkShader::kRepeat_TileMode == fTileModeY) {
         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];
 }