Port S32A_opaque blit row to SkOpts.

src/core/SkBlitRow_D32.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlitRow.h"
 #include "SkBlitMask.h"
 #include "SkColorPriv.h"
@@ skipping 34 matching lines @@
 #else
         do {
             *dst = SkAlphaMulQ(*src, src_scale) + SkAlphaMulQ(*dst, dst_scale);
             src += 1;
             dst += 1;
         } while (--count > 0);
 #endif
     }
 }
 
-static void S32A_Opaque_BlitRow32(SkPMColor* SK_RESTRICT dst,
-                                  const SkPMColor* SK_RESTRICT src,
-                                  int count, U8CPU alpha) {
-    SkASSERT(255 == alpha);
-    if (count > 0) {
-#ifdef UNROLL
-        if (count & 1) {
-            *dst = SkPMSrcOver(*(src++), *dst);
-            dst += 1;
-            count -= 1;
-        }
-
-        const SkPMColor* SK_RESTRICT srcEnd = src + count;
-        while (src != srcEnd) {
-            *dst = SkPMSrcOver(*(src++), *dst);
-            dst += 1;
-            *dst = SkPMSrcOver(*(src++), *dst);
-            dst += 1;
-        }
-#else
-        do {
-            *dst = SkPMSrcOver(*src, *dst);
-            src += 1;
-            dst += 1;
-        } while (--count > 0);
-#endif
-    }
-}
-
 static void S32A_Blend_BlitRow32(SkPMColor* SK_RESTRICT dst,
                                  const SkPMColor* SK_RESTRICT src,
                                  int count, U8CPU alpha) {
     SkASSERT(alpha <= 255);
     if (count > 0) {
 #ifdef UNROLL
         if (count & 1) {
             *dst = SkBlendARGB32(*(src++), *dst, alpha);
             dst += 1;
             count -= 1;
@@ skipping 14 matching lines @@
         } while (--count > 0);
 #endif
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static const SkBlitRow::Proc32 gDefault_Procs32[] = {
     S32_Opaque_BlitRow32,
     S32_Blend_BlitRow32,
-    S32A_Opaque_BlitRow32,
+    nullptr,
     S32A_Blend_BlitRow32
 };
 
 SkBlitRow::Proc32 SkBlitRow::Factory32(unsigned flags) {
     SkASSERT(flags < SK_ARRAY_COUNT(gDefault_Procs32));
     // just so we don't crash
     flags &= kFlags32_Mask;
 
+    if (flags == 2) {
+        // S32A_Opaque_BlitRow32 has been ported to SkOpts, but not the others yet.
+        return SkOpts::blit_row_s32a_opaque;
+    }
+
     SkBlitRow::Proc32 proc = PlatformProcs32(flags);
     if (nullptr == proc) {
         proc = gDefault_Procs32[flags];
     }
     SkASSERT(proc);
     return proc;
 }
 
 void SkBlitRow::Color32(SkPMColor dst[], const SkPMColor src[], int count, SkPMColor color) {
     switch (SkGetPackedA32(color)) {
         case   0: memmove(dst, src, count * sizeof(SkPMColor)); return;
         case 255: sk_memset32(dst, color, count);               return;
     }
     return SkOpts::blit_row_color32(dst, src, count, color);
 }