Port convolve functions to SkOpts

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
 
 #include "SkRasterPipeline.h"
 #include "SkTextureCompressor.h"
 #include "SkTypes.h"
 #include "SkXfermode.h"
+#include "SkConvolver.h"
 #include <functional>
 
 struct ProcCoeff;
 
 namespace SkOpts {
     // Call to replace pointers to portable functions with pointers to CPU-specific functions.
     // Thread-safe and idempotent.
     // Called by SkGraphics::Init().
     void Init();
 
@@ skipping 44 matching lines @@
     extern void (*srcover_srgb_srgb)(uint32_t* dst, const uint32_t* src, int ndst, int nsrc);
 
     // The fastest high quality 32-bit hash we can provide on this platform.
     extern uint32_t (*hash_fn)(const void*, size_t, uint32_t seed);
     static inline uint32_t hash(const void* data, size_t bytes, uint32_t seed=0) {
         return hash_fn(data, bytes, seed);
     }
 
     extern
     std::function<void(size_t, size_t)> (*compile_pipeline)(const SkRasterPipeline::Stage*, int);
+
+    extern void (*convolve_vertically)(const SkConvolutionFilter1D::ConvolutionFixed* filter_values,
+                                       int filter_length, unsigned char* const* source_data_rows,
+                                       int pixel_width, unsigned char* out_row, bool has_alpha);
+    extern void (*convolve_4_rows_horizontally)(const unsigned char* src_data[4],
+                                                const SkConvolutionFilter1D& filter,
+                                                unsigned char* out_row[4], size_t out_row_bytes);
+    extern void (*convolve_horizontally)(const unsigned char* src_data, const SkConvolutionFilter1D& filter,
+                                         unsigned char* out_row, bool has_alpha);
 }
 
 #endif//SkOpts_DEFINED