Sampler bias for all nofilter flavors

src/opts/SkBitmapProcState_opts_SSE2.cpp

 /*
  * Copyright 2009 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.
  */
 
 #include <emmintrin.h>
 #include "SkBitmapProcState_opts_SSE2.h"
 #include "SkColorPriv.h"
@@ skipping 356 matching lines @@
 /*  SSE version of ClampX_ClampY_nofilter_scale()
  *  portable version is in core/SkBitmapProcState_matrix.h
  */
 void ClampX_ClampY_nofilter_scale_SSE2(const SkBitmapProcState& s,
                                     uint32_t xy[], int count, int x, int y) {
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask)) == 0);
 
     // we store y, x, x, x, x, x
     const unsigned maxX = s.fPixmap.width() - 1;
-    SkFixed fx;
-    SkPoint pt;
-    s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
-                             SkIntToScalar(y) + SK_ScalarHalf, &pt);
-    fx = SkScalarToFixed(pt.fY);
+    const SkBitmapProcStateAutoMapper mapper(s, x, y);
     const unsigned maxY = s.fPixmap.height() - 1;
-    *xy++ = SkClampMax(fx >> 16, maxY);
-    fx = SkScalarToFixed(pt.fX);
+    *xy++ = SkClampMax(SkFractionalIntToInt(mapper.y()), maxY);
+    SkFixed fx = SkFractionalIntToFixed(mapper.x());
 
     if (0 == maxX) {
         // all of the following X values must be 0
         memset(xy, 0, count * sizeof(uint16_t));
         return;
     }
 
     const SkFixed dx = s.fInvSx;
 
     // test if we don't need to apply the tile proc
@@ skipping 163 matching lines @@
 /*  SSE version of ClampX_ClampY_nofilter_affine()
  *  portable version is in core/SkBitmapProcState_matrix.h
  */
 void ClampX_ClampY_nofilter_affine_SSE2(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);
 
-    SkPoint srcPt;
-    s.fInvProc(s.fInvMatrix,
-               SkIntToScalar(x) + SK_ScalarHalf,
-               SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
+    const SkBitmapProcStateAutoMapper mapper(s, x, y);
 
-    SkFixed fx = SkScalarToFixed(srcPt.fX);
-    SkFixed fy = SkScalarToFixed(srcPt.fY);
+    SkFixed fx = SkFractionalIntToFixed(mapper.x());
+    SkFixed fy = SkFractionalIntToFixed(mapper.y());
     SkFixed dx = s.fInvSx;
     SkFixed dy = s.fInvKy;
     int maxX = s.fPixmap.width() - 1;
     int maxY = s.fPixmap.height() - 1;
 
     if (count >= 4 && (maxX <= 0xFFFF)) {
         while (((size_t)xy & 0x0F) != 0) {
             *xy++ = (SkClampMax(fy >> 16, maxY) << 16) |
                                   SkClampMax(fx >> 16, maxX);
             fx += dx;
@@ skipping 40 matching lines @@
         } // while count >= 4
     } // if count >= 4
 
     while (count-- > 0) {
         *xy++ = (SkClampMax(fy >> 16, maxY) << 16) |
                               SkClampMax(fx >> 16, maxX);
         fx += dx;
         fy += dy;
     }
 }