michael@0: /*
michael@0:  * Copyright 2013 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "SkColorPriv.h"
michael@0: #include "SkMorphology_opts.h"
michael@0: #include "SkMorphology_opts_neon.h"
michael@0: 
michael@0: #include <arm_neon.h>
michael@0: 
michael@0: /* neon version of dilateX, dilateY, erodeX, erodeY.
michael@0:  * portable versions are in src/effects/SkMorphologyImageFilter.cpp.
michael@0:  */
michael@0: 
michael@0: enum MorphType {
michael@0:     kDilate, kErode
michael@0: };
michael@0: 
michael@0: enum MorphDirection {
michael@0:     kX, kY
michael@0: };
michael@0: 
michael@0: template<MorphType type, MorphDirection direction>
michael@0: static void SkMorph_neon(const SkPMColor* src, SkPMColor* dst, int radius,
michael@0:                          int width, int height, int srcStride, int dstStride)
michael@0: {
michael@0:     const int srcStrideX = direction == kX ? 1 : srcStride;
michael@0:     const int dstStrideX = direction == kX ? 1 : dstStride;
michael@0:     const int srcStrideY = direction == kX ? srcStride : 1;
michael@0:     const int dstStrideY = direction == kX ? dstStride : 1;
michael@0:     radius = SkMin32(radius, width - 1);
michael@0:     const SkPMColor* upperSrc = src + radius * srcStrideX;
michael@0:     for (int x = 0; x < width; ++x) {
michael@0:         const SkPMColor* lp = src;
michael@0:         const SkPMColor* up = upperSrc;
michael@0:         SkPMColor* dptr = dst;
michael@0:         for (int y = 0; y < height; ++y) {
michael@0:             uint8x8_t max = vdup_n_u8(type == kDilate ? 0 : 255);
michael@0:             for (const SkPMColor* p = lp; p <= up; p += srcStrideX) {
michael@0:                 uint8x8_t src_pixel = vreinterpret_u8_u32(vdup_n_u32(*p));
michael@0:                 max = type == kDilate ? vmax_u8(src_pixel, max) : vmin_u8(src_pixel, max);
michael@0:             }
michael@0:             *dptr = vget_lane_u32(vreinterpret_u32_u8(max), 0);
michael@0:             dptr += dstStrideY;
michael@0:             lp += srcStrideY;
michael@0:             up += srcStrideY;
michael@0:         }
michael@0:         if (x >= radius) src += srcStrideX;
michael@0:         if (x + radius < width - 1) upperSrc += srcStrideX;
michael@0:         dst += dstStrideX;
michael@0:     }
michael@0: }
michael@0: 
michael@0: void SkDilateX_neon(const SkPMColor* src, SkPMColor* dst, int radius,
michael@0:                     int width, int height, int srcStride, int dstStride)
michael@0: {
michael@0:     SkMorph_neon<kDilate, kX>(src, dst, radius, width, height, srcStride, dstStride);
michael@0: }
michael@0: 
michael@0: void SkErodeX_neon(const SkPMColor* src, SkPMColor* dst, int radius,
michael@0:                    int width, int height, int srcStride, int dstStride)
michael@0: {
michael@0:     SkMorph_neon<kErode, kX>(src, dst, radius, width, height, srcStride, dstStride);
michael@0: }
michael@0: 
michael@0: void SkDilateY_neon(const SkPMColor* src, SkPMColor* dst, int radius,
michael@0:                     int width, int height, int srcStride, int dstStride)
michael@0: {
michael@0:     SkMorph_neon<kDilate, kY>(src, dst, radius, width, height, srcStride, dstStride);
michael@0: }
michael@0: 
michael@0: void SkErodeY_neon(const SkPMColor* src, SkPMColor* dst, int radius,
michael@0:                    int width, int height, int srcStride, int dstStride)
michael@0: {
michael@0:     SkMorph_neon<kErode, kY>(src, dst, radius, width, height, srcStride, dstStride);
michael@0: }