Add SSSE3 acceleration for S32_D16_filter_DX

src/opts/SkBitmapProcState_opts_SSSE3.cpp

 /*
  * Copyright 2012 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 "SkBitmapProcState_opts_SSSE3.h"
 #include "SkColorPriv.h"
 #include "SkPaint.h"
@@ skipping 714 matching lines @@
                                       int count, uint32_t* colors) {
     S32_generic_D32_filter_DXDY_SSSE3<false>(s, xy, count, colors);
 }
 
 void S32_alpha_D32_filter_DXDY_SSSE3(const SkBitmapProcState& s,
                                      const uint32_t* xy,
                                      int count, uint32_t* colors) {
     S32_generic_D32_filter_DXDY_SSSE3<true>(s, xy, count, colors);
 }
 
+void S32_D16_filter_DX_SSSE3(const SkBitmapProcState& s,
+                             const uint32_t* xy,
+                             int count, uint16_t* colors) {
+    SkASSERT(254 >= count);
+    SkAutoSTMalloc<254, uint32_t> colors32(count);
+    S32_generic_D32_filter_DX_SSSE3<false>(s, xy, count, colors32);
+    for(int i = 0; i < count; i++) {
+        *colors++ = SkPixel32ToPixel16(colors32[i]);
+    }
+}
+
 void S32_D16_filter_DXDY_SSSE3(const SkBitmapProcState& s,
                                const uint32_t* xy,
                                int count, uint16_t* colors) {
     SkASSERT(64 >= count);
     SkAutoSTMalloc<64, uint32_t> colors32(count);
     S32_generic_D32_filter_DXDY_SSSE3<false>(s, xy, count, colors32);
     for(int i = 0; i < count; i++) {
         *colors++ = SkPixel32ToPixel16(colors32[i]);
     }
 }
@@ skipping 17 matching lines @@
                                       int count, uint32_t* colors) {
     sk_throw();
 }
 
 void S32_alpha_D32_filter_DXDY_SSSE3(const SkBitmapProcState& s,
                                      const uint32_t* xy,
                                      int count, uint32_t* colors) {
     sk_throw();
 }
 
+void S32_D16_filter_DX_SSSE3(const SkBitmapProcState& s,
+                             const uint32_t* xy,
+                             int count, uint16_t* colors) {
+    sk_throw();
+}
+
 void S32_D16_filter_DXDY_SSSE3(const SkBitmapProcState& s,
                                const uint32_t* xy,
                                int count, uint16_t* colors) {
     sk_throw();
 }
 
 #endif