Sampler bias for all nofilter flavors

src/core/SkBitmapProcState_matrixProcs.cpp

 /*
  * Copyright 2008 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // The copyright below was added in 2009, but I see no record of moto contributions...?
 
 /* NEON optimized code (C) COPYRIGHT 2009 Motorola
@@ skipping 310 matching lines @@
     }
 #else
     for (int i = 0; i < count; i++) {
         *xptr++ = start++;
     }
 #endif
 }
 
 static int nofilter_trans_preamble(const SkBitmapProcState& s, uint32_t** xy,
                                    int x, int y) {
-    SkPoint pt;
-    s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
-               SkIntToScalar(y) + SK_ScalarHalf, &pt);
-    **xy = s.fIntTileProcY(SkScalarToFixed(pt.fY) >> 16,
-                           s.fPixmap.height());
+    const SkBitmapProcStateAutoMapper mapper(s, x, y);
+    **xy = s.fIntTileProcY(SkFractionalIntToInt(mapper.y()), s.fPixmap.height());
     *xy += 1;   // bump the ptr
     // return our starting X position
-    return SkScalarToFixed(pt.fX) >> 16;
+    return SkFractionalIntToInt(mapper.x());
 }
 
 static void clampx_nofilter_trans(const SkBitmapProcState& s,
                                   uint32_t xy[], int count, int x, int y) {
     SkASSERT((s.fInvType & ~SkMatrix::kTranslate_Mask) == 0);
 
     int xpos = nofilter_trans_preamble(s, &xy, x, y);
     const int width = s.fPixmap.width();
     if (1 == width) {
         // all of the following X values must be 0
@@ skipping 175 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];
 }