Port morphology to SkOpts.

src/opts/SkMorphology_opts_SSE2.cpp

-/*
- * 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.
- */
-
-#include <emmintrin.h>
-#include "SkColorPriv.h"
-#include "SkMorphology_opts_SSE2.h"
-
-/* SSE2 version of dilateX, dilateY, erodeX, erodeY.
- * portable versions are in src/effects/SkMorphologyImageFilter.cpp.
- */
-
-enum MorphType {
-    kDilate, kErode
-};
-
-enum MorphDirection {
-    kX, kY
-};
-
-template<MorphType type, MorphDirection direction>
-static void SkMorph_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
-                         int width, int height, int srcStride, int dstStride)
-{
-    const int srcStrideX = direction == kX ? 1 : srcStride;
-    const int dstStrideX = direction == kX ? 1 : dstStride;
-    const int srcStrideY = direction == kX ? srcStride : 1;
-    const int dstStrideY = direction == kX ? dstStride : 1;
-    radius = SkMin32(radius, width - 1);
-    const SkPMColor* upperSrc = src + radius * srcStrideX;
-    for (int x = 0; x < width; ++x) {
-        const SkPMColor* lp = src;
-        const SkPMColor* up = upperSrc;
-        SkPMColor* dptr = dst;
-        for (int y = 0; y < height; ++y) {
-            __m128i max = type == kDilate ? _mm_setzero_si128() : _mm_set1_epi32(0xFFFFFFFF);
-            for (const SkPMColor* p = lp; p <= up; p += srcStrideX) {
-                __m128i src_pixel = _mm_cvtsi32_si128(*p);
-                max = type == kDilate ? _mm_max_epu8(src_pixel, max) : _mm_min_epu8(src_pixel, max);
-            }
-            *dptr = _mm_cvtsi128_si32(max);
-            dptr += dstStrideY;
-            lp += srcStrideY;
-            up += srcStrideY;
-        }
-        if (x >= radius) {
-            src += srcStrideX;
-        }
-        if (x + radius < width - 1) {
-            upperSrc += srcStrideX;
-        }
-        dst += dstStrideX;
-    }
-}
-
-void SkDilateX_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
-                    int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_SSE2<kDilate, kX>(src, dst, radius, width, height, srcStride, dstStride);
-}
-
-void SkErodeX_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
-                   int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_SSE2<kErode, kX>(src, dst, radius, width, height, srcStride, dstStride);
-}
-
-void SkDilateY_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
-                    int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_SSE2<kDilate, kY>(src, dst, radius, width, height, srcStride, dstStride);
-}
-
-void SkErodeY_SSE2(const SkPMColor* src, SkPMColor* dst, int radius,
-                   int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_SSE2<kErode, kY>(src, dst, radius, width, height, srcStride, dstStride);
-}