1 files changed, 126 insertions, 0 deletions
diff --git a/thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterNeon.h b/thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterNeon.h
new file mode 100644
index 0000000000..c74a6b309c
--- /dev/null
+++ b/thirdparty/thorvg/src/lib/sw_engine/tvgSwRasterNeon.h
@@ -0,0 +1,126 @@
+/*
+ * 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