Optimize color xforms with 2.2 gammas for SSE2

src/opts/SkOpts_ssse3.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOpts.h"
 #define SK_OPTS_NS sk_ssse3
 #include "SkBlitMask_opts.h"
 #include "SkColorCubeFilter_opts.h"
+#include "SkColorXform_opts.h"
 #include "SkSwizzler_opts.h"
 #include "SkXfermode_opts.h"
 
 namespace SkOpts {
     void Init_ssse3() {
         create_xfermode = sk_ssse3::create_xfermode;
         blit_mask_d32_a8 = sk_ssse3::blit_mask_d32_a8;
         color_cube_filter_span = sk_ssse3::color_cube_filter_span;
 
         RGBA_to_BGRA          = sk_ssse3::RGBA_to_BGRA;
         RGBA_to_rgbA          = sk_ssse3::RGBA_to_rgbA;
         RGBA_to_bgrA          = sk_ssse3::RGBA_to_bgrA;
         RGB_to_RGB1           = sk_ssse3::RGB_to_RGB1;
         RGB_to_BGR1           = sk_ssse3::RGB_to_BGR1;
         gray_to_RGB1          = sk_ssse3::gray_to_RGB1;
         grayA_to_RGBA         = sk_ssse3::grayA_to_RGBA;
         grayA_to_rgbA         = sk_ssse3::grayA_to_rgbA;
         inverted_CMYK_to_RGB1 = sk_ssse3::inverted_CMYK_to_RGB1;
         inverted_CMYK_to_BGR1 = sk_ssse3::inverted_CMYK_to_BGR1;
+
+        color_xform_2Dot2_RGBA_to_8888 = sk_ssse3::color_xform_2Dot2_RGBA_to_8888;

[mtklein, 2016/06/08 01:41:41]

I think everything you used is ≤SSE2.  sk_default:: should cover it fine.  Did I
miss something?

[msarett, 2016/06/08 13:48:28]

Thanks, yes SSE2 is fine!  Didn't realize that default == sse2.

     }
 }