| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkBitmapProcState_opts_DEFINED |
| #define SkBitmapProcState_opts_DEFINED |
| |
| #include "include/private/SkVx.h" |
| #include "src/core/SkBitmapProcState.h" |
| #include "src/core/SkMSAN.h" |
| |
| // SkBitmapProcState optimized Shader, Sample, or Matrix procs. |
| // |
| // Only S32_alpha_D32_filter_DX exploits instructions beyond |
| // our common baseline SSE2/NEON instruction sets, so that's |
| // all that lives here. |
| // |
| // The rest are scattershot at the moment but I want to get them |
| // all migrated to be normal code inside SkBitmapProcState.cpp. |
| |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 |
| #include <immintrin.h> |
| #elif defined(SK_ARM_HAS_NEON) |
| #include <arm_neon.h> |
| #endif |
| |
| namespace SK_OPTS_NS { |
| |
| // This same basic packing scheme is used throughout the file. |
| template <typename U32, typename Out> |
| static void decode_packed_coordinates_and_weight(U32 packed, Out* v0, Out* v1, Out* w) { |
| *v0 = (packed >> 18); // Integer coordinate x0 or y0. |
| *v1 = (packed & 0x3fff); // Integer coordinate x1 or y1. |
| *w = (packed >> 14) & 0xf; // Lerp weight for v1; weight for v0 is 16-w. |
| } |
| |
| #if 1 && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 |
| /*not static*/ inline |
| void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, |
| const uint32_t* xy, int count, uint32_t* colors) { |
| SkASSERT(count > 0 && colors != nullptr); |
| SkASSERT(s.fFilterQuality != kNone_SkFilterQuality); |
| SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); |
| SkASSERT(s.fAlphaScale <= 256); |
| |
| // In a _DX variant only X varies; all samples share y0/y1 coordinates and wy weight. |
| int y0, y1, wy; |
| decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); |
| |
| const uint32_t* row0 = s.fPixmap.addr32(0,y0); |
| const uint32_t* row1 = s.fPixmap.addr32(0,y1); |
| |
| auto bilerp = [&](skvx::Vec<8,uint32_t> packed_x_coordinates) -> skvx::Vec<8,uint32_t> { |
| // Decode up to 8 output pixels' x-coordinates and weights. |
| skvx::Vec<8,uint32_t> x0,x1,wx; |
| decode_packed_coordinates_and_weight(packed_x_coordinates, &x0, &x1, &wx); |
| |
| // Splat wx to each color channel. |
| wx = (wx << 0) |
| | (wx << 8) |
| | (wx << 16) |
| | (wx << 24); |
| |
| auto gather = [](const uint32_t* ptr, skvx::Vec<8,uint32_t> ix) { |
| #if 1 |
| // Drop into AVX2 intrinsics for vpgatherdd. |
| return skvx::bit_pun<skvx::Vec<8,uint32_t>>( |
| _mm256_i32gather_epi32((const int*)ptr, skvx::bit_pun<__m256i>(ix), 4)); |
| #else |
| // Portable version... sometimes I don't trust vpgatherdd. |
| return skvx::Vec<8,uint32_t>{ |
| ptr[ix[0]], ptr[ix[1]], ptr[ix[2]], ptr[ix[3]], |
| ptr[ix[4]], ptr[ix[5]], ptr[ix[6]], ptr[ix[7]], |
| }; |
| #endif |
| }; |
| |
| // Gather the 32 32-bit pixels that we'll bilerp into our 8 output pixels. |
| skvx::Vec<8,uint32_t> tl = gather(row0, x0), tr = gather(row0, x1), |
| bl = gather(row1, x0), br = gather(row1, x1); |
| |
| #if 1 |
| // We'll use _mm256_maddubs_epi16() to lerp much like in the SSSE3 code. |
| auto lerp_x = [&](skvx::Vec<8,uint32_t> L, skvx::Vec<8,uint32_t> R) { |
| __m256i l = skvx::bit_pun<__m256i>(L), |
| r = skvx::bit_pun<__m256i>(R), |
| wr = skvx::bit_pun<__m256i>(wx), |
| wl = _mm256_sub_epi8(_mm256_set1_epi8(16), wr); |
| |
| // Interlace l,r bytewise and line them up with their weights, then lerp. |
| __m256i lo = _mm256_maddubs_epi16(_mm256_unpacklo_epi8( l, r), |
| _mm256_unpacklo_epi8(wl,wr)); |
| __m256i hi = _mm256_maddubs_epi16(_mm256_unpackhi_epi8( l, r), |
| _mm256_unpackhi_epi8(wl,wr)); |
| |
| // Those _mm256_unpack??_epi8() calls left us in a bit of an odd order: |
| // |
| // if l = a b c d | e f g h |
| // and r = A B C D | E F G H |
| // |
| // then lo = a A b B | e E f F (low half of each input) |
| // and hi = c C d D | g G h H (high half of each input) |
| // |
| // To get everything back in original order we need to transpose that. |
| __m256i abcd = _mm256_permute2x128_si256(lo, hi, 0x20), |
| efgh = _mm256_permute2x128_si256(lo, hi, 0x31); |
| |
| return skvx::join(skvx::bit_pun<skvx::Vec<16,uint16_t>>(abcd), |
| skvx::bit_pun<skvx::Vec<16,uint16_t>>(efgh)); |
| }; |
| |
| skvx::Vec<32, uint16_t> top = lerp_x(tl, tr), |
| bot = lerp_x(bl, br), |
| sum = 16*top + (bot-top)*wy; |
| #else |
| // Treat 32-bit pixels as 4 8-bit values, and expand to 16-bit for room to multiply. |
| auto to_16x4 = [](auto v) -> skvx::Vec<32, uint16_t> { |
| return skvx::cast<uint16_t>(skvx::bit_pun<skvx::Vec<32, uint8_t>>(v)); |
| }; |
| |
| // Sum up weighted sample pixels. The naive, redundant math would be, |
| // |
| // sum = tl * (16-wy) * (16-wx) |
| // + bl * ( wy) * (16-wx) |
| // + tr * (16-wy) * ( wx) |
| // + br * ( wy) * ( wx) |
| // |
| // But we refactor to eliminate a bunch of those common factors. |
| auto lerp = [](auto lo, auto hi, auto w) { |
| return 16*lo + (hi-lo)*w; |
| }; |
| skvx::Vec<32, uint16_t> sum = lerp(lerp(to_16x4(tl), to_16x4(bl), wy), |
| lerp(to_16x4(tr), to_16x4(br), wy), to_16x4(wx)); |
| #endif |
| |
| // Get back to [0,255] by dividing by maximum weight 16x16 = 256. |
| sum >>= 8; |
| |
| // Scale by [0,256] alpha. |
| sum *= s.fAlphaScale; |
| sum >>= 8; |
| |
| // Pack back to 8-bit channels, undoing to_16x4(). |
| return skvx::bit_pun<skvx::Vec<8,uint32_t>>(skvx::cast<uint8_t>(sum)); |
| }; |
| |
| while (count >= 8) { |
| bilerp(skvx::Vec<8,uint32_t>::Load(xy)).store(colors); |
| xy += 8; |
| colors += 8; |
| count -= 8; |
| } |
| if (count > 0) { |
| __m256i active = skvx::bit_pun<__m256i>( count > skvx::Vec<8,int>{0,1,2,3, 4,5,6,7} ), |
| coords = _mm256_maskload_epi32((const int*)xy, active), |
| pixels; |
| |
| bilerp(skvx::bit_pun<skvx::Vec<8,uint32_t>>(coords)).store(&pixels); |
| _mm256_maskstore_epi32((int*)colors, active, pixels); |
| |
| sk_msan_mark_initialized(colors, colors+count, |
| "MSAN still doesn't understand AVX2 mask loads and stores."); |
| } |
| } |
| |
| #elif 1 && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 |
| |
| /*not static*/ inline |
| void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, |
| const uint32_t* xy, int count, uint32_t* colors) { |
| SkASSERT(count > 0 && colors != nullptr); |
| SkASSERT(s.fFilterQuality != kNone_SkFilterQuality); |
| SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); |
| SkASSERT(s.fAlphaScale <= 256); |
| |
| // interpolate_in_x() is the crux of the SSSE3 implementation, |
| // interpolating in X for up to two output pixels (A and B) using _mm_maddubs_epi16(). |
| auto interpolate_in_x = [](uint32_t A0, uint32_t A1, |
| uint32_t B0, uint32_t B1, |
| __m128i interlaced_x_weights) { |
| // _mm_maddubs_epi16() is a little idiosyncratic, but great as the core of a lerp. |
| // |
| // It takes two arguments interlaced byte-wise: |
| // - first arg: [ l,r, ... 7 more pairs of unsigned 8-bit values ...] |
| // - second arg: [ w,W, ... 7 more pairs of signed 8-bit values ...] |
| // and returns 8 signed 16-bit values: [ l*w + r*W, ... 7 more ... ]. |
| // |
| // That's why we go to all this trouble to make interlaced_x_weights, |
| // and here we're about to interlace A0 with A1 and B0 with B1 to match. |
| // |
| // Our interlaced_x_weights are all in [0,16], and so we need not worry about |
| // the signedness of that input nor about the signedness of the output. |
| |
| __m128i interlaced_A = _mm_unpacklo_epi8(_mm_cvtsi32_si128(A0), _mm_cvtsi32_si128(A1)), |
| interlaced_B = _mm_unpacklo_epi8(_mm_cvtsi32_si128(B0), _mm_cvtsi32_si128(B1)); |
| |
| return _mm_maddubs_epi16(_mm_unpacklo_epi64(interlaced_A, interlaced_B), |
| interlaced_x_weights); |
| }; |
| |
| // Interpolate {A0..A3} --> output pixel A, and {B0..B3} --> output pixel B. |
| // Returns two pixels, with each color channel in a 16-bit lane of the __m128i. |
| auto interpolate_in_x_and_y = [&](uint32_t A0, uint32_t A1, |
| uint32_t A2, uint32_t A3, |
| uint32_t B0, uint32_t B1, |
| uint32_t B2, uint32_t B3, |
| __m128i interlaced_x_weights, |
| int wy) { |
| // Interpolate each row in X, leaving 16-bit lanes scaled by interlaced_x_weights. |
| __m128i top = interpolate_in_x(A0,A1, B0,B1, interlaced_x_weights), |
| bot = interpolate_in_x(A2,A3, B2,B3, interlaced_x_weights); |
| |
| // Interpolate in Y. As in the SSE2 code, we calculate top*(16-wy) + bot*wy |
| // as 16*top + (bot-top)*wy to save a multiply. |
| __m128i px = _mm_add_epi16(_mm_slli_epi16(top, 4), |
| _mm_mullo_epi16(_mm_sub_epi16(bot, top), |
| _mm_set1_epi16(wy))); |
| |
| // Scale down by total max weight 16x16 = 256. |
| px = _mm_srli_epi16(px, 8); |
| |
| // Scale by alpha if needed. |
| if (s.fAlphaScale < 256) { |
| px = _mm_srli_epi16(_mm_mullo_epi16(px, _mm_set1_epi16(s.fAlphaScale)), 8); |
| } |
| return px; |
| }; |
| |
| // We're in _DX mode here, so we're only varying in X. |
| // That means the first entry of xy is our constant pair of Y coordinates and weight in Y. |
| // All the other entries in xy will be pairs of X coordinates and the X weight. |
| int y0, y1, wy; |
| decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); |
| |
| auto row0 = (const uint32_t*)((const uint8_t*)s.fPixmap.addr() + y0 * s.fPixmap.rowBytes()), |
| row1 = (const uint32_t*)((const uint8_t*)s.fPixmap.addr() + y1 * s.fPixmap.rowBytes()); |
| |
| while (count >= 4) { |
| // We can really get going, loading 4 X-pairs at a time to produce 4 output pixels. |
| int x0[4], |
| x1[4]; |
| __m128i wx; |
| |
| // decode_packed_coordinates_and_weight(), 4x. |
| __m128i packed = _mm_loadu_si128((const __m128i*)xy); |
| _mm_storeu_si128((__m128i*)x0, _mm_srli_epi32(packed, 18)); |
| _mm_storeu_si128((__m128i*)x1, _mm_and_si128 (packed, _mm_set1_epi32(0x3fff))); |
| wx = _mm_and_si128(_mm_srli_epi32(packed, 14), _mm_set1_epi32(0xf)); // [0,15] |
| |
| // Splat each x weight 4x (for each color channel) as wr for pixels on the right at x1, |
| // and sixteen minus that as wl for pixels on the left at x0. |
| __m128i wr = _mm_shuffle_epi8(wx, _mm_setr_epi8(0,0,0,0,4,4,4,4,8,8,8,8,12,12,12,12)), |
| wl = _mm_sub_epi8(_mm_set1_epi8(16), wr); |
| |
| // We need to interlace wl and wr for _mm_maddubs_epi16(). |
| __m128i interlaced_x_weights_AB = _mm_unpacklo_epi8(wl,wr), |
| interlaced_x_weights_CD = _mm_unpackhi_epi8(wl,wr); |
| |
| enum { A,B,C,D }; |
| |
| // interpolate_in_x_and_y() can produce two output pixels (A and B) at a time |
| // from eight input pixels {A0..A3} and {B0..B3}, arranged in a 2x2 grid for each. |
| __m128i AB = interpolate_in_x_and_y(row0[x0[A]], row0[x1[A]], |
| row1[x0[A]], row1[x1[A]], |
| row0[x0[B]], row0[x1[B]], |
| row1[x0[B]], row1[x1[B]], |
| interlaced_x_weights_AB, wy); |
| |
| // Once more with the other half of the x-weights for two more pixels C,D. |
| __m128i CD = interpolate_in_x_and_y(row0[x0[C]], row0[x1[C]], |
| row1[x0[C]], row1[x1[C]], |
| row0[x0[D]], row0[x1[D]], |
| row1[x0[D]], row1[x1[D]], |
| interlaced_x_weights_CD, wy); |
| |
| // Scale by alpha, pack back together to 8-bit lanes, and write out four pixels! |
| _mm_storeu_si128((__m128i*)colors, _mm_packus_epi16(AB, CD)); |
| xy += 4; |
| colors += 4; |
| count -= 4; |
| } |
| |
| while (count --> 0) { |
| // This is exactly the same flow as the count >= 4 loop above, but writing one pixel. |
| int x0, x1, wx; |
| decode_packed_coordinates_and_weight(*xy++, &x0, &x1, &wx); |
| |
| // As above, splat out wx four times as wr, and sixteen minus that as wl. |
| __m128i wr = _mm_set1_epi8(wx), // This splats it out 16 times, but that's fine. |
| wl = _mm_sub_epi8(_mm_set1_epi8(16), wr); |
| |
| __m128i interlaced_x_weights = _mm_unpacklo_epi8(wl, wr); |
| |
| __m128i A = interpolate_in_x_and_y(row0[x0], row0[x1], |
| row1[x0], row1[x1], |
| 0, 0, |
| 0, 0, |
| interlaced_x_weights, wy); |
| |
| *colors++ = _mm_cvtsi128_si32(_mm_packus_epi16(A, _mm_setzero_si128())); |
| } |
| } |
| |
| |
| #elif 1 && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 |
| |
| /*not static*/ inline |
| void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, |
| const uint32_t* xy, int count, uint32_t* colors) { |
| SkASSERT(count > 0 && colors != nullptr); |
| SkASSERT(s.fFilterQuality != kNone_SkFilterQuality); |
| SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); |
| SkASSERT(s.fAlphaScale <= 256); |
| |
| int y0, y1, wy; |
| decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); |
| |
| auto row0 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y0 * s.fPixmap.rowBytes() ), |
| row1 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y1 * s.fPixmap.rowBytes() ); |
| |
| // We'll put one pixel in the low 4 16-bit lanes to line up with wy, |
| // and another in the upper 4 16-bit lanes to line up with 16 - wy. |
| const __m128i allY = _mm_unpacklo_epi64(_mm_set1_epi16( wy), // Bottom pixel goes here. |
| _mm_set1_epi16(16-wy)); // Top pixel goes here. |
| |
| while (count --> 0) { |
| int x0, x1, wx; |
| decode_packed_coordinates_and_weight(*xy++, &x0, &x1, &wx); |
| |
| // Load the 4 pixels we're interpolating, in this grid: |
| // | tl tr | |
| // | bl br | |
| const __m128i tl = _mm_cvtsi32_si128(row0[x0]), tr = _mm_cvtsi32_si128(row0[x1]), |
| bl = _mm_cvtsi32_si128(row1[x0]), br = _mm_cvtsi32_si128(row1[x1]); |
| |
| // We want to calculate a sum of 4 pixels weighted in two directions: |
| // |
| // sum = tl * (16-wy) * (16-wx) |
| // + bl * ( wy) * (16-wx) |
| // + tr * (16-wy) * ( wx) |
| // + br * ( wy) * ( wx) |
| // |
| // (Notice top --> 16-wy, bottom --> wy, left --> 16-wx, right --> wx.) |
| // |
| // We've already prepared allY as a vector containing [wy, 16-wy] as a way |
| // to apply those y-direction weights. So we'll start on the x-direction |
| // first, grouping into left and right halves, lined up with allY: |
| // |
| // L = [bl, tl] |
| // R = [br, tr] |
| // |
| // sum = horizontalSum( allY * (L*(16-wx) + R*wx) ) |
| // |
| // Rewriting that one more step, we can replace a multiply with a shift: |
| // |
| // sum = horizontalSum( allY * (16*L + (R-L)*wx) ) |
| // |
| // That's how we'll actually do this math. |
| |
| __m128i L = _mm_unpacklo_epi8(_mm_unpacklo_epi32(bl, tl), _mm_setzero_si128()), |
| R = _mm_unpacklo_epi8(_mm_unpacklo_epi32(br, tr), _mm_setzero_si128()); |
| |
| __m128i inner = _mm_add_epi16(_mm_slli_epi16(L, 4), |
| _mm_mullo_epi16(_mm_sub_epi16(R,L), _mm_set1_epi16(wx))); |
| |
| __m128i sum_in_x = _mm_mullo_epi16(inner, allY); |
| |
| // sum = horizontalSum( ... ) |
| __m128i sum = _mm_add_epi16(sum_in_x, _mm_srli_si128(sum_in_x, 8)); |
| |
| // Get back to [0,255] by dividing by maximum weight 16x16 = 256. |
| sum = _mm_srli_epi16(sum, 8); |
| |
| if (s.fAlphaScale < 256) { |
| // Scale by alpha, which is in [0,256]. |
| sum = _mm_mullo_epi16(sum, _mm_set1_epi16(s.fAlphaScale)); |
| sum = _mm_srli_epi16(sum, 8); |
| } |
| |
| // Pack back into 8-bit values and store. |
| *colors++ = _mm_cvtsi128_si32(_mm_packus_epi16(sum, _mm_setzero_si128())); |
| } |
| } |
| |
| #else |
| |
| // The NEON code only actually differs from the portable code in the |
| // filtering step after we've loaded all four pixels we want to bilerp. |
| |
| #if defined(SK_ARM_HAS_NEON) |
| static void filter_and_scale_by_alpha(unsigned x, unsigned y, |
| SkPMColor a00, SkPMColor a01, |
| SkPMColor a10, SkPMColor a11, |
| SkPMColor *dst, |
| uint16_t scale) { |
| uint8x8_t vy, vconst16_8, v16_y, vres; |
| uint16x4_t vx, vconst16_16, v16_x, tmp, vscale; |
| uint32x2_t va0, va1; |
| uint16x8_t tmp1, tmp2; |
| |
| vy = vdup_n_u8(y); // duplicate y into vy |
| vconst16_8 = vmov_n_u8(16); // set up constant in vconst16_8 |
| v16_y = vsub_u8(vconst16_8, vy); // v16_y = 16-y |
| |
| va0 = vdup_n_u32(a00); // duplicate a00 |
| va1 = vdup_n_u32(a10); // duplicate a10 |
| va0 = vset_lane_u32(a01, va0, 1); // set top to a01 |
| va1 = vset_lane_u32(a11, va1, 1); // set top to a11 |
| |
| tmp1 = vmull_u8(vreinterpret_u8_u32(va0), v16_y); // tmp1 = [a01|a00] * (16-y) |
| tmp2 = vmull_u8(vreinterpret_u8_u32(va1), vy); // tmp2 = [a11|a10] * y |
| |
| vx = vdup_n_u16(x); // duplicate x into vx |
| vconst16_16 = vmov_n_u16(16); // set up constant in vconst16_16 |
| v16_x = vsub_u16(vconst16_16, vx); // v16_x = 16-x |
| |
| tmp = vmul_u16(vget_high_u16(tmp1), vx); // tmp = a01 * x |
| tmp = vmla_u16(tmp, vget_high_u16(tmp2), vx); // tmp += a11 * x |
| tmp = vmla_u16(tmp, vget_low_u16(tmp1), v16_x); // tmp += a00 * (16-x) |
| tmp = vmla_u16(tmp, vget_low_u16(tmp2), v16_x); // tmp += a10 * (16-x) |
| |
| if (scale < 256) { |
| vscale = vdup_n_u16(scale); // duplicate scale |
| tmp = vshr_n_u16(tmp, 8); // shift down result by 8 |
| tmp = vmul_u16(tmp, vscale); // multiply result by scale |
| } |
| |
| vres = vshrn_n_u16(vcombine_u16(tmp, vcreate_u16(0)), 8); // shift down result by 8 |
| vst1_lane_u32(dst, vreinterpret_u32_u8(vres), 0); // store result |
| } |
| #else |
| static void filter_and_scale_by_alpha(unsigned x, unsigned y, |
| SkPMColor a00, SkPMColor a01, |
| SkPMColor a10, SkPMColor a11, |
| SkPMColor* dstColor, |
| unsigned alphaScale) { |
| SkASSERT((unsigned)x <= 0xF); |
| SkASSERT((unsigned)y <= 0xF); |
| SkASSERT(alphaScale <= 256); |
| |
| int xy = x * y; |
| const uint32_t mask = 0xFF00FF; |
| |
| int scale = 256 - 16*y - 16*x + xy; |
| uint32_t lo = (a00 & mask) * scale; |
| uint32_t hi = ((a00 >> 8) & mask) * scale; |
| |
| scale = 16*x - xy; |
| lo += (a01 & mask) * scale; |
| hi += ((a01 >> 8) & mask) * scale; |
| |
| scale = 16*y - xy; |
| lo += (a10 & mask) * scale; |
| hi += ((a10 >> 8) & mask) * scale; |
| |
| lo += (a11 & mask) * xy; |
| hi += ((a11 >> 8) & mask) * xy; |
| |
| if (alphaScale < 256) { |
| lo = ((lo >> 8) & mask) * alphaScale; |
| hi = ((hi >> 8) & mask) * alphaScale; |
| } |
| |
| *dstColor = ((lo >> 8) & mask) | (hi & ~mask); |
| } |
| #endif |
| |
| |
| /*not static*/ inline |
| void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, |
| const uint32_t* xy, int count, SkPMColor* colors) { |
| SkASSERT(count > 0 && colors != nullptr); |
| SkASSERT(s.fFilterQuality != kNone_SkFilterQuality); |
| SkASSERT(4 == s.fPixmap.info().bytesPerPixel()); |
| SkASSERT(s.fAlphaScale <= 256); |
| |
| int y0, y1, wy; |
| decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); |
| |
| auto row0 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y0 * s.fPixmap.rowBytes() ), |
| row1 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y1 * s.fPixmap.rowBytes() ); |
| |
| while (count --> 0) { |
| int x0, x1, wx; |
| decode_packed_coordinates_and_weight(*xy++, &x0, &x1, &wx); |
| |
| filter_and_scale_by_alpha(wx, wy, |
| row0[x0], row0[x1], |
| row1[x0], row1[x1], |
| colors++, |
| s.fAlphaScale); |
| } |
| } |
| |
| #endif |
| |
| } // namespace SK_OPTS_NS |
| |
| #endif |
