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/*
* Copyright (c) 2021 Samsung Electronics Co., Ltd. All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifdef THORVG_NEON_VECTOR_SUPPORT
#include <arm_neon.h>
static inline uint8x8_t ALPHA_BLEND(uint8x8_t c, uint8x8_t a)
{
uint16x8_t t = vmull_u8(c, a);
return vshrn_n_u16(t, 8);
}
static void neonRasterRGBA32(uint32_t *dst, uint32_t val, uint32_t offset, int32_t len)
{
uint32_t iterations = len / 4;
uint32_t neonFilled = iterations * 4;
dst += offset;
uint32x4_t vectorVal = {val, val, val, val};
for (uint32_t i = 0; i < iterations; ++i) {
vst1q_u32(dst, vectorVal);
dst += 4;
}
int32_t leftovers = len - neonFilled;
while (leftovers--) *dst++ = val;
}
static bool neonRasterTranslucentRle(SwSurface* surface, const SwRleData* rle, uint32_t color)
{
auto span = rle->spans;
uint32_t src;
uint8x8_t *vDst = nullptr;
uint16_t align;
for (uint32_t i = 0; i < rle->size; ++i) {
if (span->coverage < 255) src = ALPHA_BLEND(color, span->coverage);
else src = color;
auto dst = &surface->buffer[span->y * surface->stride + span->x];
auto ialpha = 255 - _alpha(src);
if ((((uint32_t) dst) & 0x7) != 0) {
//fill not aligned byte
*dst = src + ALPHA_BLEND(*dst, ialpha);
vDst = (uint8x8_t*)(dst + 1);
align = 1;
} else {
vDst = (uint8x8_t*) dst;
align = 0;
}
uint8x8_t vSrc = (uint8x8_t) vdup_n_u32(src);
uint8x8_t vIalpha = vdup_n_u8((uint8_t) ialpha);
for (uint32_t x = 0; x < (span->len - align) / 2; ++x)
vDst[x] = vadd_u8(vSrc, ALPHA_BLEND(vDst[x], vIalpha));
auto leftovers = (span->len - align) % 2;
if (leftovers > 0) dst[span->len - 1] = src + ALPHA_BLEND(dst[span->len - 1], ialpha);
++span;
}
return true;
}
static bool neonRasterTranslucentRect(SwSurface* surface, const SwBBox& region, uint32_t color)
{
auto buffer = surface->buffer + (region.min.y * surface->stride) + region.min.x;
auto h = static_cast<uint32_t>(region.max.y - region.min.y);
auto w = static_cast<uint32_t>(region.max.x - region.min.x);
auto ialpha = 255 - _alpha(color);
auto vColor = vdup_n_u32(color);
auto vIalpha = vdup_n_u8((uint8_t) ialpha);
uint8x8_t* vDst = nullptr;
uint32_t align;
for (uint32_t y = 0; y < h; ++y) {
auto dst = &buffer[y * surface->stride];
if ((((uint32_t) dst) & 0x7) != 0) {
//fill not aligned byte
*dst = color + ALPHA_BLEND(*dst, ialpha);
vDst = (uint8x8_t*) (dst + 1);
align = 1;
} else {
vDst = (uint8x8_t*) dst;
align = 0;
}
for (uint32_t x = 0; x < (w - align) / 2; ++x)
vDst[x] = vadd_u8((uint8x8_t)vColor, ALPHA_BLEND(vDst[x], vIalpha));
auto leftovers = (w - align) % 2;
if (leftovers > 0) dst[w - 1] = color + ALPHA_BLEND(dst[w - 1], ialpha);
}
return true;
}
#endif
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