Rewriting MatrixConvolution image filter with SSE and AVX2

src/core/SkOpts.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkOpts_DEFINED
 #define SkOpts_DEFINED
 
@@ skipping 49 matching lines @@
                         RGB_to_RGB1,           // i.e. insert an opaque alpha
                         RGB_to_BGR1,           // i.e. swap RB and insert an opaque alpha
                         gray_to_RGB1,          // i.e. expand to color channels + an opaque alpha
                         grayA_to_RGBA,         // i.e. expand to color channels
                         grayA_to_rgbA,         // i.e. expand to color channels and premultiply
                         inverted_CMYK_to_RGB1, // i.e. convert color space
                         inverted_CMYK_to_BGR1; // i.e. convert color space
 
     extern void (*half_to_float)(float[], const uint16_t[], int);
     extern void (*float_to_half)(uint16_t[], const float[], int);
+
+    extern void (*matrix_convolution_image_filter_filter_pixels)(
+        const SkBitmap& src,
+        SkBitmap* result,
+        const SkIRect& r,
+        const SkIRect& bounds,
+        bool convolveAlpha,
+        SkScalar* kernel,
+        const SkISize& kernel_size,
+        const SkIPoint&  kernel_offset,
+        SkScalar gain,
+        SkScalar bias);
 }
 
 #endif//SkOpts_DEFINED