Working plumb of image scaling:

src/opts/SkBitmapProcState_matrix_clamp_neon.h

 /* 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.
  */
 
 /*
  * Modifications done in-house at Motorola
  *
  * this is a clone of SkBitmapProcState_matrix.h
@@ skipping 49 matching lines @@
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask)) == 0);
 
     PREAMBLE(s);
     // we store y, x, x, x, x, x
 
     const unsigned maxX = s.fBitmap->width() - 1;
     SkFixed fx;
     {
         SkPoint pt;
-        s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
-                                  SkIntToScalar(y) + SK_ScalarHalf, &pt);
+        s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
+                                 SkIntToScalar(y) + SK_ScalarHalf, &pt);
         fx = SkScalarToFixed(pt.fY);
         const unsigned maxY = s.fBitmap->height() - 1;
         *xy++ = TILEY_PROCF(fx, maxY);
         fx = SkScalarToFixed(pt.fX);
     }
 
     if (0 == maxX) {
         // all of the following X values must be 0
         memset(xy, 0, count * sizeof(uint16_t));
         return;
@@ skipping 80 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,
+    s.fInvProc(s.fInvMatrix,
                SkIntToScalar(x) + SK_ScalarHalf,
                SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
 
     SkFixed fx = SkScalarToFixed(srcPt.fX);
     SkFixed fy = SkScalarToFixed(srcPt.fY);
     SkFixed dx = s.fInvSx;
     SkFixed dy = s.fInvKy;
     int maxX = s.fBitmap->width() - 1;
     int maxY = s.fBitmap->height() - 1;
 
@@ skipping 92 matching lines @@
 static void PERSP_NOFILTER_NAME(const SkBitmapProcState& s,
                                 uint32_t* SK_RESTRICT xy,
                                 int count, int x, int y) {
     SkASSERT(s.fInvType & SkMatrix::kPerspective_Mask);
 
     PREAMBLE(s);
     /* max{X,Y} are int here, but later shown/assumed to fit in 16 bits */
     int maxX = s.fBitmap->width() - 1;
     int maxY = s.fBitmap->height() - 1;
 
-    SkPerspIter   iter(*s.fInvMatrix,
+    SkPerspIter   iter(s.fInvMatrix,
                        SkIntToScalar(x) + SK_ScalarHalf,
                        SkIntToScalar(y) + SK_ScalarHalf, count);
 
     while ((count = iter.next()) != 0) {
         const SkFixed* SK_RESTRICT srcXY = iter.getXY();
 
 #if defined(DEBUG_PERSP_NOFILTER)
     /* debugging stuff */
     const SkFixed *end_srcXY = srcXY + (count*2);
     uint32_t *end_xy = xy + (count);
@@ skipping 189 matching lines @@
 
     PREAMBLE(s);
 
     const unsigned maxX = s.fBitmap->width() - 1;
     const SkFixed one = s.fFilterOneX;
     const SkFixed dx = s.fInvSx;
     SkFixed fx;
 
     {
         SkPoint pt;
-        s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
-                                  SkIntToScalar(y) + SK_ScalarHalf, &pt);
+        s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
+                                 SkIntToScalar(y) + SK_ScalarHalf, &pt);
         const SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1);
         const unsigned maxY = s.fBitmap->height() - 1;
         // compute our two Y values up front
         *xy++ = PACK_FILTER_Y_NAME(fy, maxY, s.fFilterOneY PREAMBLE_ARG_Y);
         // now initialize fx
         fx = SkScalarToFixed(pt.fX) - (one >> 1);
     }
 
 #ifdef CHECK_FOR_DECAL
     // test if we don't need to apply the tile proc
@@ skipping 82 matching lines @@
 
 static void AFFINE_FILTER_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,
+    s.fInvProc(s.fInvMatrix,
                SkIntToScalar(x) + SK_ScalarHalf,
                SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
 
     SkFixed oneX = s.fFilterOneX;
     SkFixed oneY = s.fFilterOneY;
     SkFixed fx = SkScalarToFixed(srcPt.fX) - (oneX >> 1);
     SkFixed fy = SkScalarToFixed(srcPt.fY) - (oneY >> 1);
     SkFixed dx = s.fInvSx;
     SkFixed dy = s.fInvKy;
     unsigned maxX = s.fBitmap->width() - 1;
@@ skipping 140 matching lines @@
                               uint32_t* SK_RESTRICT xy, int count,
                               int x, int y) {
     SkASSERT(s.fInvType & SkMatrix::kPerspective_Mask);
 
     PREAMBLE(s);
     unsigned maxX = s.fBitmap->width() - 1;
     unsigned maxY = s.fBitmap->height() - 1;
     SkFixed oneX = s.fFilterOneX;
     SkFixed oneY = s.fFilterOneY;
 
-    SkPerspIter   iter(*s.fInvMatrix,
+    SkPerspIter   iter(s.fInvMatrix,
                        SkIntToScalar(x) + SK_ScalarHalf,
                        SkIntToScalar(y) + SK_ScalarHalf, count);
 
     while ((count = iter.next()) != 0) {
         const SkFixed* SK_RESTRICT srcXY = iter.getXY();
 
         if (count >= 4) {
             int32x4_t wide_i, wide_lo;
             int32x4_t wide_fx1;
             int32x4_t wide_fy1;
@@ skipping 131 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