Implement SSE2-based implementations of the morphology filters (dilate &

src/opts/SkMorphology_opts_SSE2.h

Index: src/opts/SkMorphology_opts_SSE2.h
diff --git a/src/opts/SkMorphology_opts_SSE2.h b/src/opts/SkMorphology_opts_SSE2.h
new file mode 100644
index 0000000000000000000000000000000000000000..bd103e6eba9a6261f6f59ff7e61450acfd169373
--- /dev/null
+++ b/src/opts/SkMorphology_opts_SSE2.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright 2013 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.
+ */
+
+void SkDilateX_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
+                    int width, int height, int srcStride, int dstStride);
+void SkDilateY_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
+                    int width, int height, int srcStride, int dstStride);
+void SkErodeX_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
+                   int width, int height, int srcStride, int dstStride);
+void SkErodeY_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
+                   int width, int height, int srcStride, int dstStride);