Port morphology to SkOpts.

src/opts/SkMorphology_opts_neon.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 "SkColorPriv.h"
-#include "SkMorphology_opts.h"
-#include "SkMorphology_opts_neon.h"
-
-#include <arm_neon.h>
-
-/* neon 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_neon(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) {
-            uint8x8_t max = vdup_n_u8(type == kDilate ? 0 : 255);
-            for (const SkPMColor* p = lp; p <= up; p += srcStrideX) {
-                uint8x8_t src_pixel = vreinterpret_u8_u32(vdup_n_u32(*p));
-                max = type == kDilate ? vmax_u8(src_pixel, max) : vmin_u8(src_pixel, max);
-            }
-            *dptr = vget_lane_u32(vreinterpret_u32_u8(max), 0);
-            dptr += dstStrideY;
-            lp += srcStrideY;
-            up += srcStrideY;
-        }
-        if (x >= radius) src += srcStrideX;
-        if (x + radius < width - 1) upperSrc += srcStrideX;
-        dst += dstStrideX;
-    }
-}
-
-void SkDilateX_neon(const SkPMColor* src, SkPMColor* dst, int radius,
-                    int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_neon<kDilate, kX>(src, dst, radius, width, height, srcStride, dstStride);
-}
-
-void SkErodeX_neon(const SkPMColor* src, SkPMColor* dst, int radius,
-                   int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_neon<kErode, kX>(src, dst, radius, width, height, srcStride, dstStride);
-}
-
-void SkDilateY_neon(const SkPMColor* src, SkPMColor* dst, int radius,
-                    int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_neon<kDilate, kY>(src, dst, radius, width, height, srcStride, dstStride);
-}
-
-void SkErodeY_neon(const SkPMColor* src, SkPMColor* dst, int radius,
-                   int width, int height, int srcStride, int dstStride)
-{
-    SkMorph_neon<kErode, kY>(src, dst, radius, width, height, srcStride, dstStride);
-}