Sampler bias for all nofilter flavors

src/opts/SkBitmapProcState_matrix_neon.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <arm_neon.h>
 
 #define SCALE_NOFILTER_NAME     MAKENAME(_nofilter_scale)
@@ skipping 20 matching lines @@
                                 uint32_t xy[], int count, int x, int y) {
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask)) == 0);
 
     PREAMBLE(s);
 
     // we store y, x, x, x, x, x
     const unsigned maxX = s.fPixmap.width() - 1;
     SkFractionalInt fx;
     {
-        SkPoint pt;
-        s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
-                                 SkIntToScalar(y) + SK_ScalarHalf, &pt);
-        fx = SkScalarToFractionalInt(pt.fY);
+        const SkBitmapProcStateAutoMapper mapper(s, x, y);
         const unsigned maxY = s.fPixmap.height() - 1;
-        *xy++ = TILEY_PROCF(SkFractionalIntToFixed(fx), maxY);
-        fx = SkScalarToFractionalInt(pt.fX);
+        *xy++ = TILEY_PROCF(SkFractionalIntToFixed(mapper.y()), maxY);
+        fx = mapper.x();
     }
 
     if (0 == maxX) {
         // all of the following X values must be 0
         memset(xy, 0, count * sizeof(uint16_t));
         return;
     }
 
     const SkFractionalInt dx = s.fInvSxFractionalInt;
 
@@ skipping 53 matching lines @@
 }
 
 static void AFFINE_NOFILTER_NAME(const SkBitmapProcState& s,
                                  uint32_t xy[], int count, int x, int y) {
     SkASSERT(s.fInvType & SkMatrix::kAffine_Mask);
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask |
                              SkMatrix::kAffine_Mask)) == 0);
 
     PREAMBLE(s);
-    SkPoint srcPt;
-    s.fInvProc(s.fInvMatrix,
-               SkIntToScalar(x) + SK_ScalarHalf,
-               SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
+    const SkBitmapProcStateAutoMapper mapper(s, x, y);
 
-    SkFractionalInt fx = SkScalarToFractionalInt(srcPt.fX);
-    SkFractionalInt fy = SkScalarToFractionalInt(srcPt.fY);
+    SkFractionalInt fx = mapper.x();
+    SkFractionalInt fy = mapper.y();
     SkFractionalInt dx = s.fInvSxFractionalInt;
     SkFractionalInt dy = s.fInvKyFractionalInt;
     int maxX = s.fPixmap.width() - 1;
     int maxY = s.fPixmap.height() - 1;
 
     if (count >= 8) {
         SkFractionalInt dx4 = dx * 4;
         SkFractionalInt dy4 = dy * 4;
         SkFractionalInt dx8 = dx * 8;
         SkFractionalInt dy8 = dy * 8;
@@ skipping 364 matching lines @@
 #undef PERSP_FILTER_NAME
 
 #undef PREAMBLE
 #undef PREAMBLE_PARAM_X
 #undef PREAMBLE_PARAM_Y
 #undef PREAMBLE_ARG_X
 #undef PREAMBLE_ARG_Y
 
 #undef TILEX_LOW_BITS
 #undef TILEY_LOW_BITS