| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkRasterPipeline_opts_DEFINED |
| #define SkRasterPipeline_opts_DEFINED |
| |
| #include "SkColorPriv.h" |
| #include "SkColorLookUpTable.h" |
| #include "SkColorSpaceXform_A2B.h" |
| #include "SkColorSpaceXformPriv.h" |
| #include "SkHalf.h" |
| #include "SkImageShaderContext.h" |
| #include "SkMSAN.h" |
| #include "SkPM4f.h" |
| #include "SkPM4fPriv.h" |
| #include "SkRasterPipeline.h" |
| #include "SkSRGB.h" |
| #include "SkUtils.h" |
| #include <utility> |
| |
| namespace { |
| |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 |
| static constexpr int N = 8; |
| #else |
| static constexpr int N = 4; |
| #endif |
| |
| using SkNf = SkNx<N, float>; |
| using SkNi = SkNx<N, int32_t>; |
| using SkNu = SkNx<N, uint32_t>; |
| using SkNh = SkNx<N, uint16_t>; |
| using SkNb = SkNx<N, uint8_t>; |
| |
| struct Stage; |
| using Fn = void(SK_VECTORCALL *)(Stage*, size_t x_tail, SkNf,SkNf,SkNf,SkNf, |
| SkNf,SkNf,SkNf,SkNf); |
| struct Stage { Fn next; void* ctx; }; |
| |
| // x_tail encodes two values x and tail as x*N+tail, where 0 <= tail < N. |
| // x is the induction variable we're walking along, incrementing by N each step. |
| // tail == 0 means work with a full N pixels; otherwise use only the low tail pixels. |
| |
| } // namespace |
| |
| #define SI static inline |
| |
| // Stages are logically a pipeline, and physically are contiguous in an array. |
| // To get to the next stage, we just increment our pointer to the next array element. |
| SI void SK_VECTORCALL next(Stage* st, size_t x_tail, SkNf r, SkNf g, SkNf b, SkNf a, |
| SkNf dr, SkNf dg, SkNf db, SkNf da) { |
| st->next(st+1, x_tail, r,g,b,a, dr,dg,db,da); |
| } |
| |
| // Stages defined below always call next. |
| // This is always the last stage, a backstop that actually returns to the caller when done. |
| SI void SK_VECTORCALL just_return(Stage*, size_t, SkNf, SkNf, SkNf, SkNf, |
| SkNf, SkNf, SkNf, SkNf) {} |
| |
| #define STAGE(name) \ |
| static SK_ALWAYS_INLINE void name##_kernel(void* ctx, size_t x, size_t tail, \ |
| SkNf& r, SkNf& g, SkNf& b, SkNf& a, \ |
| SkNf& dr, SkNf& dg, SkNf& db, SkNf& da); \ |
| SI void SK_VECTORCALL name(Stage* st, size_t x_tail, \ |
| SkNf r, SkNf g, SkNf b, SkNf a, \ |
| SkNf dr, SkNf dg, SkNf db, SkNf da) { \ |
| name##_kernel(st->ctx, x_tail/N, x_tail%N, r,g,b,a, dr,dg,db,da); \ |
| next(st, x_tail, r,g,b,a, dr,dg,db,da); \ |
| } \ |
| static SK_ALWAYS_INLINE void name##_kernel(void* ctx, size_t x, size_t tail, \ |
| SkNf& r, SkNf& g, SkNf& b, SkNf& a, \ |
| SkNf& dr, SkNf& dg, SkNf& db, SkNf& da) |
| |
| |
| // Many xfermodes apply the same logic to each channel. |
| #define RGBA_XFERMODE(name) \ |
| static SK_ALWAYS_INLINE SkNf name##_kernel(const SkNf& s, const SkNf& sa, \ |
| const SkNf& d, const SkNf& da); \ |
| SI void SK_VECTORCALL name(Stage* st, size_t x_tail, \ |
| SkNf r, SkNf g, SkNf b, SkNf a, \ |
| SkNf dr, SkNf dg, SkNf db, SkNf da) { \ |
| r = name##_kernel(r,a,dr,da); \ |
| g = name##_kernel(g,a,dg,da); \ |
| b = name##_kernel(b,a,db,da); \ |
| a = name##_kernel(a,a,da,da); \ |
| next(st, x_tail, r,g,b,a, dr,dg,db,da); \ |
| } \ |
| static SK_ALWAYS_INLINE SkNf name##_kernel(const SkNf& s, const SkNf& sa, \ |
| const SkNf& d, const SkNf& da) |
| |
| // Most of the rest apply the same logic to color channels and use srcover's alpha logic. |
| #define RGB_XFERMODE(name) \ |
| static SK_ALWAYS_INLINE SkNf name##_kernel(const SkNf& s, const SkNf& sa, \ |
| const SkNf& d, const SkNf& da); \ |
| SI void SK_VECTORCALL name(Stage* st, size_t x_tail, \ |
| SkNf r, SkNf g, SkNf b, SkNf a, \ |
| SkNf dr, SkNf dg, SkNf db, SkNf da) { \ |
| r = name##_kernel(r,a,dr,da); \ |
| g = name##_kernel(g,a,dg,da); \ |
| b = name##_kernel(b,a,db,da); \ |
| a = a + (da * (1.0f-a)); \ |
| next(st, x_tail, r,g,b,a, dr,dg,db,da); \ |
| } \ |
| static SK_ALWAYS_INLINE SkNf name##_kernel(const SkNf& s, const SkNf& sa, \ |
| const SkNf& d, const SkNf& da) |
| |
| template <typename T> |
| SI SkNx<N,T> load(size_t tail, const T* src) { |
| if (tail) { |
| T buf[8] = {0}; |
| switch (tail & (N-1)) { |
| case 7: buf[6] = src[6]; |
| case 6: buf[5] = src[5]; |
| case 5: buf[4] = src[4]; |
| case 4: buf[3] = src[3]; |
| case 3: buf[2] = src[2]; |
| case 2: buf[1] = src[1]; |
| } |
| buf[0] = src[0]; |
| return SkNx<N,T>::Load(buf); |
| } |
| return SkNx<N,T>::Load(src); |
| } |
| template <typename T> |
| SI SkNx<N,T> gather(size_t tail, const T* src, const SkNi& offset) { |
| if (tail) { |
| T buf[8] = {0}; |
| switch (tail & (N-1)) { |
| case 7: buf[6] = src[offset[6]]; |
| case 6: buf[5] = src[offset[5]]; |
| case 5: buf[4] = src[offset[4]]; |
| case 4: buf[3] = src[offset[3]]; |
| case 3: buf[2] = src[offset[2]]; |
| case 2: buf[1] = src[offset[1]]; |
| } |
| buf[0] = src[offset[0]]; |
| return SkNx<N,T>::Load(buf); |
| } |
| T buf[8]; |
| for (size_t i = 0; i < N; i++) { |
| buf[i] = src[offset[i]]; |
| } |
| return SkNx<N,T>::Load(buf); |
| } |
| template <typename T> |
| SI void store(size_t tail, const SkNx<N,T>& v, T* dst) { |
| if (tail) { |
| switch (tail & (N-1)) { |
| case 7: dst[6] = v[6]; |
| case 6: dst[5] = v[5]; |
| case 5: dst[4] = v[4]; |
| case 4: dst[3] = v[3]; |
| case 3: dst[2] = v[2]; |
| case 2: dst[1] = v[1]; |
| } |
| dst[0] = v[0]; |
| return; |
| } |
| v.store(dst); |
| } |
| |
| #if !defined(SKNX_NO_SIMD) && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 |
| SI __m256i mask(size_t tail) { |
| static const int masks[][8] = { |
| {~0,~0,~0,~0, ~0,~0,~0,~0 }, // remember, tail == 0 ~~> load all N |
| {~0, 0, 0, 0, 0, 0, 0, 0 }, |
| {~0,~0, 0, 0, 0, 0, 0, 0 }, |
| {~0,~0,~0, 0, 0, 0, 0, 0 }, |
| {~0,~0,~0,~0, 0, 0, 0, 0 }, |
| {~0,~0,~0,~0, ~0, 0, 0, 0 }, |
| {~0,~0,~0,~0, ~0,~0, 0, 0 }, |
| {~0,~0,~0,~0, ~0,~0,~0, 0 }, |
| }; |
| return SkNi::Load(masks + tail).fVec; |
| } |
| |
| SI SkNi load(size_t tail, const int32_t* src) { |
| return tail ? _mm256_maskload_epi32((const int*)src, mask(tail)) |
| : SkNi::Load(src); |
| } |
| SI SkNu load(size_t tail, const uint32_t* src) { |
| return tail ? _mm256_maskload_epi32((const int*)src, mask(tail)) |
| : SkNu::Load(src); |
| } |
| SI SkNi gather(size_t tail, const int32_t* src, const SkNi& offset) { |
| return _mm256_mask_i32gather_epi32(SkNi(0).fVec, |
| (const int*)src, offset.fVec, mask(tail), 4); |
| } |
| SI SkNu gather(size_t tail, const uint32_t* src, const SkNi& offset) { |
| return _mm256_mask_i32gather_epi32(SkNi(0).fVec, |
| (const int*)src, offset.fVec, mask(tail), 4); |
| } |
| |
| static const char* bug = "I don't think MSAN understands maskstore."; |
| |
| SI void store(size_t tail, const SkNi& v, int32_t* dst) { |
| if (tail) { |
| _mm256_maskstore_epi32((int*)dst, mask(tail), v.fVec); |
| return sk_msan_mark_initialized(dst, dst+tail, bug); |
| } |
| v.store(dst); |
| } |
| SI void store(size_t tail, const SkNu& v, uint32_t* dst) { |
| if (tail) { |
| _mm256_maskstore_epi32((int*)dst, mask(tail), v.fVec); |
| return sk_msan_mark_initialized(dst, dst+tail, bug); |
| } |
| v.store(dst); |
| } |
| #endif |
| |
| SI void from_8888(const SkNu& _8888, SkNf* r, SkNf* g, SkNf* b, SkNf* a) { |
| auto to_float = [](const SkNu& v) { return SkNx_cast<float>(SkNi::Load(&v)); }; |
| *r = (1/255.0f)*to_float((_8888 >> 0) & 0xff); |
| *g = (1/255.0f)*to_float((_8888 >> 8) & 0xff); |
| *b = (1/255.0f)*to_float((_8888 >> 16) & 0xff); |
| *a = (1/255.0f)*to_float( _8888 >> 24 ); |
| } |
| SI void from_4444(const SkNh& _4444, SkNf* r, SkNf* g, SkNf* b, SkNf* a) { |
| auto _32_bit = SkNx_cast<int>(_4444); |
| |
| *r = SkNx_cast<float>(_32_bit & (0xF << SK_R4444_SHIFT)) * (1.0f / (0xF << SK_R4444_SHIFT)); |
| *g = SkNx_cast<float>(_32_bit & (0xF << SK_G4444_SHIFT)) * (1.0f / (0xF << SK_G4444_SHIFT)); |
| *b = SkNx_cast<float>(_32_bit & (0xF << SK_B4444_SHIFT)) * (1.0f / (0xF << SK_B4444_SHIFT)); |
| *a = SkNx_cast<float>(_32_bit & (0xF << SK_A4444_SHIFT)) * (1.0f / (0xF << SK_A4444_SHIFT)); |
| } |
| SI void from_565(const SkNh& _565, SkNf* r, SkNf* g, SkNf* b) { |
| auto _32_bit = SkNx_cast<int>(_565); |
| |
| *r = SkNx_cast<float>(_32_bit & SK_R16_MASK_IN_PLACE) * (1.0f / SK_R16_MASK_IN_PLACE); |
| *g = SkNx_cast<float>(_32_bit & SK_G16_MASK_IN_PLACE) * (1.0f / SK_G16_MASK_IN_PLACE); |
| *b = SkNx_cast<float>(_32_bit & SK_B16_MASK_IN_PLACE) * (1.0f / SK_B16_MASK_IN_PLACE); |
| } |
| |
| STAGE(trace) { |
| SkDebugf("%s\n", (const char*)ctx); |
| } |
| STAGE(registers) { |
| auto print = [](const char* name, const SkNf& v) { |
| SkDebugf("%s:", name); |
| for (int i = 0; i < N; i++) { |
| SkDebugf(" %g", v[i]); |
| } |
| SkDebugf("\n"); |
| }; |
| print(" r", r); |
| print(" g", g); |
| print(" b", b); |
| print(" a", a); |
| print("dr", dr); |
| print("dg", dg); |
| print("db", db); |
| print("da", da); |
| } |
| |
| STAGE(clamp_0) { |
| a = SkNf::Max(a, 0.0f); |
| r = SkNf::Max(r, 0.0f); |
| g = SkNf::Max(g, 0.0f); |
| b = SkNf::Max(b, 0.0f); |
| } |
| STAGE(clamp_a) { |
| a = SkNf::Min(a, 1.0f); |
| r = SkNf::Min(r, a); |
| g = SkNf::Min(g, a); |
| b = SkNf::Min(b, a); |
| } |
| STAGE(clamp_1) { |
| a = SkNf::Min(a, 1.0f); |
| r = SkNf::Min(r, 1.0f); |
| g = SkNf::Min(g, 1.0f); |
| b = SkNf::Min(b, 1.0f); |
| } |
| |
| STAGE(unpremul) { |
| auto scale = (a == 0.0f).thenElse(0.0f, 1.0f/a); |
| r *= scale; |
| g *= scale; |
| b *= scale; |
| } |
| STAGE(premul) { |
| r *= a; |
| g *= a; |
| b *= a; |
| } |
| |
| STAGE(set_rgb) { |
| auto rgb = (const float*)ctx; |
| r = rgb[0]; |
| g = rgb[1]; |
| b = rgb[2]; |
| } |
| |
| STAGE(move_src_dst) { |
| dr = r; |
| dg = g; |
| db = b; |
| da = a; |
| } |
| STAGE(move_dst_src) { |
| r = dr; |
| g = dg; |
| b = db; |
| a = da; |
| } |
| |
| STAGE(swap_rb) { SkTSwap( r, b); } |
| STAGE(swap_rb_d) { SkTSwap(dr, db); } |
| |
| STAGE(from_srgb) { |
| r = sk_linear_from_srgb_math(r); |
| g = sk_linear_from_srgb_math(g); |
| b = sk_linear_from_srgb_math(b); |
| } |
| STAGE(from_srgb_d) { |
| dr = sk_linear_from_srgb_math(dr); |
| dg = sk_linear_from_srgb_math(dg); |
| db = sk_linear_from_srgb_math(db); |
| } |
| STAGE(to_srgb) { |
| r = sk_linear_to_srgb_needs_round(r); |
| g = sk_linear_to_srgb_needs_round(g); |
| b = sk_linear_to_srgb_needs_round(b); |
| } |
| |
| // The default shader produces a constant color (from the SkPaint). |
| STAGE(constant_color) { |
| auto color = (const SkPM4f*)ctx; |
| r = color->r(); |
| g = color->g(); |
| b = color->b(); |
| a = color->a(); |
| } |
| |
| // s' = sc for a constant c. |
| STAGE(scale_constant_float) { |
| SkNf c = *(const float*)ctx; |
| |
| r *= c; |
| g *= c; |
| b *= c; |
| a *= c; |
| } |
| // s' = sc for 8-bit c. |
| STAGE(scale_u8) { |
| auto ptr = *(const uint8_t**)ctx + x; |
| |
| SkNf c = SkNx_cast<float>(load(tail, ptr)) * (1/255.0f); |
| r = r*c; |
| g = g*c; |
| b = b*c; |
| a = a*c; |
| } |
| |
| SI SkNf lerp(const SkNf& from, const SkNf& to, const SkNf& cov) { |
| return SkNx_fma(to-from, cov, from); |
| } |
| |
| // s' = d(1-c) + sc, for a constant c. |
| STAGE(lerp_constant_float) { |
| SkNf c = *(const float*)ctx; |
| |
| r = lerp(dr, r, c); |
| g = lerp(dg, g, c); |
| b = lerp(db, b, c); |
| a = lerp(da, a, c); |
| } |
| |
| // s' = d(1-c) + sc for 8-bit c. |
| STAGE(lerp_u8) { |
| auto ptr = *(const uint8_t**)ctx + x; |
| |
| SkNf c = SkNx_cast<float>(load(tail, ptr)) * (1/255.0f); |
| r = lerp(dr, r, c); |
| g = lerp(dg, g, c); |
| b = lerp(db, b, c); |
| a = lerp(da, a, c); |
| } |
| |
| // s' = d(1-c) + sc for 565 c. |
| STAGE(lerp_565) { |
| auto ptr = *(const uint16_t**)ctx + x; |
| SkNf cr, cg, cb; |
| from_565(load(tail, ptr), &cr, &cg, &cb); |
| |
| r = lerp(dr, r, cr); |
| g = lerp(dg, g, cg); |
| b = lerp(db, b, cb); |
| a = 1.0f; |
| } |
| |
| STAGE(load_565) { |
| auto ptr = *(const uint16_t**)ctx + x; |
| from_565(load(tail, ptr), &r,&g,&b); |
| a = 1.0f; |
| } |
| STAGE(load_565_d) { |
| auto ptr = *(const uint16_t**)ctx + x; |
| from_565(load(tail, ptr), &dr,&dg,&db); |
| da = 1.0f; |
| } |
| STAGE(store_565) { |
| auto ptr = *(uint16_t**)ctx + x; |
| store(tail, SkNx_cast<uint16_t>( SkNx_cast<int>(r*SK_R16_MASK + 0.5f) << SK_R16_SHIFT |
| | SkNx_cast<int>(g*SK_G16_MASK + 0.5f) << SK_G16_SHIFT |
| | SkNx_cast<int>(b*SK_B16_MASK + 0.5f) << SK_B16_SHIFT), ptr); |
| } |
| |
| |
| STAGE(load_f16) { |
| auto ptr = *(const uint64_t**)ctx + x; |
| |
| SkNh rh, gh, bh, ah; |
| if (tail) { |
| uint64_t buf[8] = {0}; |
| switch (tail & (N-1)) { |
| case 7: buf[6] = ptr[6]; |
| case 6: buf[5] = ptr[5]; |
| case 5: buf[4] = ptr[4]; |
| case 4: buf[3] = ptr[3]; |
| case 3: buf[2] = ptr[2]; |
| case 2: buf[1] = ptr[1]; |
| } |
| buf[0] = ptr[0]; |
| SkNh::Load4(buf, &rh, &gh, &bh, &ah); |
| } else { |
| SkNh::Load4(ptr, &rh, &gh, &bh, &ah); |
| } |
| |
| r = SkHalfToFloat_finite_ftz(rh); |
| g = SkHalfToFloat_finite_ftz(gh); |
| b = SkHalfToFloat_finite_ftz(bh); |
| a = SkHalfToFloat_finite_ftz(ah); |
| } |
| STAGE(load_f16_d) { |
| auto ptr = *(const uint64_t**)ctx + x; |
| |
| SkNh rh, gh, bh, ah; |
| if (tail) { |
| uint64_t buf[8] = {0}; |
| switch (tail & (N-1)) { |
| case 7: buf[6] = ptr[6]; |
| case 6: buf[5] = ptr[5]; |
| case 5: buf[4] = ptr[4]; |
| case 4: buf[3] = ptr[3]; |
| case 3: buf[2] = ptr[2]; |
| case 2: buf[1] = ptr[1]; |
| } |
| buf[0] = ptr[0]; |
| SkNh::Load4(buf, &rh, &gh, &bh, &ah); |
| } else { |
| SkNh::Load4(ptr, &rh, &gh, &bh, &ah); |
| } |
| |
| dr = SkHalfToFloat_finite_ftz(rh); |
| dg = SkHalfToFloat_finite_ftz(gh); |
| db = SkHalfToFloat_finite_ftz(bh); |
| da = SkHalfToFloat_finite_ftz(ah); |
| } |
| STAGE(store_f16) { |
| auto ptr = *(uint64_t**)ctx + x; |
| |
| uint64_t buf[8]; |
| SkNh::Store4(tail ? buf : ptr, SkFloatToHalf_finite_ftz(r), |
| SkFloatToHalf_finite_ftz(g), |
| SkFloatToHalf_finite_ftz(b), |
| SkFloatToHalf_finite_ftz(a)); |
| if (tail) { |
| switch (tail & (N-1)) { |
| case 7: ptr[6] = buf[6]; |
| case 6: ptr[5] = buf[5]; |
| case 5: ptr[4] = buf[4]; |
| case 4: ptr[3] = buf[3]; |
| case 3: ptr[2] = buf[2]; |
| case 2: ptr[1] = buf[1]; |
| } |
| ptr[0] = buf[0]; |
| } |
| } |
| |
| STAGE(store_f32) { |
| auto ptr = *(SkPM4f**)ctx + x; |
| |
| SkPM4f buf[8]; |
| SkNf::Store4(tail ? buf : ptr, r,g,b,a); |
| if (tail) { |
| switch (tail & (N-1)) { |
| case 7: ptr[6] = buf[6]; |
| case 6: ptr[5] = buf[5]; |
| case 5: ptr[4] = buf[4]; |
| case 4: ptr[3] = buf[3]; |
| case 3: ptr[2] = buf[2]; |
| case 2: ptr[1] = buf[1]; |
| } |
| ptr[0] = buf[0]; |
| } |
| } |
| |
| |
| STAGE(load_8888) { |
| auto ptr = *(const uint32_t**)ctx + x; |
| from_8888(load(tail, ptr), &r, &g, &b, &a); |
| } |
| STAGE(load_8888_d) { |
| auto ptr = *(const uint32_t**)ctx + x; |
| from_8888(load(tail, ptr), &dr, &dg, &db, &da); |
| } |
| STAGE(store_8888) { |
| auto ptr = *(uint32_t**)ctx + x; |
| store(tail, ( SkNx_cast<int>(255.0f * r + 0.5f) << 0 |
| | SkNx_cast<int>(255.0f * g + 0.5f) << 8 |
| | SkNx_cast<int>(255.0f * b + 0.5f) << 16 |
| | SkNx_cast<int>(255.0f * a + 0.5f) << 24 ), (int*)ptr); |
| } |
| |
| SI SkNf inv(const SkNf& x) { return 1.0f - x; } |
| |
| RGBA_XFERMODE(clear) { return 0.0f; } |
| RGBA_XFERMODE(srcatop) { return s*da + d*inv(sa); } |
| RGBA_XFERMODE(srcin) { return s * da; } |
| RGBA_XFERMODE(srcout) { return s * inv(da); } |
| RGBA_XFERMODE(srcover) { return SkNx_fma(d, inv(sa), s); } |
| RGBA_XFERMODE(dstatop) { return srcatop_kernel(d,da,s,sa); } |
| RGBA_XFERMODE(dstin) { return srcin_kernel (d,da,s,sa); } |
| RGBA_XFERMODE(dstout) { return srcout_kernel (d,da,s,sa); } |
| RGBA_XFERMODE(dstover) { return srcover_kernel(d,da,s,sa); } |
| |
| RGBA_XFERMODE(modulate) { return s*d; } |
| RGBA_XFERMODE(multiply) { return s*inv(da) + d*inv(sa) + s*d; } |
| RGBA_XFERMODE(plus_) { return s + d; } |
| RGBA_XFERMODE(screen) { return s + d - s*d; } |
| RGBA_XFERMODE(xor_) { return s*inv(da) + d*inv(sa); } |
| |
| RGB_XFERMODE(colorburn) { |
| return (d == da ).thenElse(d + s*inv(da), |
| (s == 0.0f).thenElse(s + d*inv(sa), |
| sa*(da - SkNf::Min(da, (da-d)*sa/s)) + s*inv(da) + d*inv(sa))); |
| } |
| RGB_XFERMODE(colordodge) { |
| return (d == 0.0f).thenElse(d + s*inv(da), |
| (s == sa ).thenElse(s + d*inv(sa), |
| sa*SkNf::Min(da, (d*sa)/(sa - s)) + s*inv(da) + d*inv(sa))); |
| } |
| RGB_XFERMODE(darken) { return s + d - SkNf::Max(s*da, d*sa); } |
| RGB_XFERMODE(difference) { return s + d - 2.0f*SkNf::Min(s*da,d*sa); } |
| RGB_XFERMODE(exclusion) { return s + d - 2.0f*s*d; } |
| RGB_XFERMODE(hardlight) { |
| return s*inv(da) + d*inv(sa) |
| + (2.0f*s <= sa).thenElse(2.0f*s*d, sa*da - 2.0f*(da-d)*(sa-s)); |
| } |
| RGB_XFERMODE(lighten) { return s + d - SkNf::Min(s*da, d*sa); } |
| RGB_XFERMODE(overlay) { return hardlight_kernel(d,da,s,sa); } |
| RGB_XFERMODE(softlight) { |
| SkNf m = (da > 0.0f).thenElse(d / da, 0.0f), |
| s2 = 2.0f*s, |
| m4 = 4.0f*m; |
| |
| // The logic forks three ways: |
| // 1. dark src? |
| // 2. light src, dark dst? |
| // 3. light src, light dst? |
| SkNf darkSrc = d*(sa + (s2 - sa)*(1.0f - m)), // Used in case 1. |
| darkDst = (m4*m4 + m4)*(m - 1.0f) + 7.0f*m, // Used in case 2. |
| liteDst = m.rsqrt().invert() - m, // Used in case 3. |
| liteSrc = d*sa + da*(s2 - sa) * (4.0f*d <= da).thenElse(darkDst, liteDst); // 2 or 3? |
| return s*inv(da) + d*inv(sa) + (s2 <= sa).thenElse(darkSrc, liteSrc); // 1 or (2 or 3)? |
| } |
| |
| STAGE(luminance_to_alpha) { |
| a = SK_LUM_COEFF_R*r + SK_LUM_COEFF_G*g + SK_LUM_COEFF_B*b; |
| r = g = b = 0; |
| } |
| |
| STAGE(matrix_2x3) { |
| auto m = (const float*)ctx; |
| |
| auto fma = [](const SkNf& f, const SkNf& m, const SkNf& a) { return SkNx_fma(f,m,a); }; |
| auto R = fma(r,m[0], fma(g,m[2], m[4])), |
| G = fma(r,m[1], fma(g,m[3], m[5])); |
| r = R; |
| g = G; |
| } |
| STAGE(matrix_3x4) { |
| auto m = (const float*)ctx; |
| |
| auto fma = [](const SkNf& f, const SkNf& m, const SkNf& a) { return SkNx_fma(f,m,a); }; |
| auto R = fma(r,m[0], fma(g,m[3], fma(b,m[6], m[ 9]))), |
| G = fma(r,m[1], fma(g,m[4], fma(b,m[7], m[10]))), |
| B = fma(r,m[2], fma(g,m[5], fma(b,m[8], m[11]))); |
| r = R; |
| g = G; |
| b = B; |
| } |
| STAGE(matrix_4x5) { |
| auto m = (const float*)ctx; |
| |
| auto fma = [](const SkNf& f, const SkNf& m, const SkNf& a) { return SkNx_fma(f,m,a); }; |
| auto R = fma(r,m[0], fma(g,m[4], fma(b,m[ 8], fma(a,m[12], m[16])))), |
| G = fma(r,m[1], fma(g,m[5], fma(b,m[ 9], fma(a,m[13], m[17])))), |
| B = fma(r,m[2], fma(g,m[6], fma(b,m[10], fma(a,m[14], m[18])))), |
| A = fma(r,m[3], fma(g,m[7], fma(b,m[11], fma(a,m[15], m[19])))); |
| r = R; |
| g = G; |
| b = B; |
| a = A; |
| } |
| STAGE(matrix_perspective) { |
| // N.B. unlike the matrix_NxM stages, this takes a row-major matrix. |
| auto m = (const float*)ctx; |
| |
| auto fma = [](const SkNf& f, const SkNf& m, const SkNf& a) { return SkNx_fma(f,m,a); }; |
| auto R = fma(r,m[0], fma(g,m[1], m[2])), |
| G = fma(r,m[3], fma(g,m[4], m[5])), |
| Z = fma(r,m[6], fma(g,m[7], m[8])); |
| r = R * Z.invert(); |
| g = G * Z.invert(); |
| } |
| |
| |
| SI SkNf parametric(const SkNf& v, const SkColorSpaceTransferFn& p) { |
| float result[N]; // Unconstrained powf() doesn't vectorize well... |
| for (int i = 0; i < N; i++) { |
| float s = v[i]; |
| result[i] = (s <= p.fD) ? p.fE * s + p.fF |
| : powf(s * p.fA + p.fB, p.fG) + p.fC; |
| } |
| return SkNf::Load(result); |
| } |
| STAGE(parametric_r) { r = parametric(r, *(const SkColorSpaceTransferFn*)ctx); } |
| STAGE(parametric_g) { g = parametric(g, *(const SkColorSpaceTransferFn*)ctx); } |
| STAGE(parametric_b) { b = parametric(b, *(const SkColorSpaceTransferFn*)ctx); } |
| |
| SI SkNf table(const SkNf& v, const SkTableTransferFn& table) { |
| float result[N]; |
| for (int i = 0; i < N; i++) { |
| result[i] = interp_lut(v[i], table.fData, table.fSize); |
| } |
| return SkNf::Load(result); |
| } |
| STAGE(table_r) { r = table(r, *(const SkTableTransferFn*)ctx); } |
| STAGE(table_g) { g = table(g, *(const SkTableTransferFn*)ctx); } |
| STAGE(table_b) { b = table(b, *(const SkTableTransferFn*)ctx); } |
| |
| STAGE(color_lookup_table) { |
| const SkColorLookUpTable* colorLUT = (const SkColorLookUpTable*)ctx; |
| float rgb[3]; |
| float result[3][N]; |
| for (int i = 0; i < N; ++i) { |
| rgb[0] = r[i]; |
| rgb[1] = g[i]; |
| rgb[2] = b[i]; |
| colorLUT->interp3D(rgb, rgb); |
| result[0][i] = rgb[0]; |
| result[1][i] = rgb[1]; |
| result[2][i] = rgb[2]; |
| } |
| r = SkNf::Load(result[0]); |
| g = SkNf::Load(result[1]); |
| b = SkNf::Load(result[2]); |
| } |
| |
| STAGE(lab_to_xyz) { |
| const auto lab_l = r * 100.0f; |
| const auto lab_a = g * 255.0f - 128.0f; |
| const auto lab_b = b * 255.0f - 128.0f; |
| auto Y = (lab_l + 16.0f) * (1/116.0f); |
| auto X = lab_a * (1/500.0f) + Y; |
| auto Z = Y - (lab_b * (1/200.0f)); |
| |
| const auto X3 = X*X*X; |
| X = (X3 > 0.008856f).thenElse(X3, (X - (16/116.0f)) * (1/7.787f)); |
| const auto Y3 = Y*Y*Y; |
| Y = (Y3 > 0.008856f).thenElse(Y3, (Y - (16/116.0f)) * (1/7.787f)); |
| const auto Z3 = Z*Z*Z; |
| Z = (Z3 > 0.008856f).thenElse(Z3, (Z - (16/116.0f)) * (1/7.787f)); |
| |
| // adjust to D50 illuminant |
| X *= 0.96422f; |
| Y *= 1.00000f; |
| Z *= 0.82521f; |
| |
| r = X; |
| g = Y; |
| b = Z; |
| } |
| |
| SI SkNf assert_in_tile(const SkNf& v, float limit) { |
| for (int i = 0; i < N; i++) { |
| SkASSERT(0 <= v[i] && v[i] < limit); |
| } |
| return v; |
| } |
| |
| SI SkNf clamp(const SkNf& v, float limit) { |
| SkNf result = SkNf::Max(0, SkNf::Min(v, limit - 0.5f)); |
| return assert_in_tile(result, limit); |
| } |
| SI SkNf repeat(const SkNf& v, float limit) { |
| SkNf result = v - (v/limit).floor()*limit; |
| // For small negative v, (v/limit).floor()*limit can dominate v in the subtraction, |
| // which leaves result == limit. We want result < limit, so clamp it one ULP. |
| result = SkNf::Min(result, nextafterf(limit, 0)); |
| return assert_in_tile(result, limit); |
| } |
| SI SkNf mirror(const SkNf& v, float l/*imit*/) { |
| SkNf result = ((v - l) - ((v - l) / (2*l)).floor()*(2*l) - l).abs(); |
| // Same deal as repeat. |
| result = SkNf::Min(result, nextafterf(l, 0)); |
| return assert_in_tile(result, l); |
| } |
| STAGE( clamp_x) { r = clamp (r, *(const int*)ctx); } |
| STAGE(repeat_x) { r = repeat(r, *(const int*)ctx); } |
| STAGE(mirror_x) { r = mirror(r, *(const int*)ctx); } |
| STAGE( clamp_y) { g = clamp (g, *(const int*)ctx); } |
| STAGE(repeat_y) { g = repeat(g, *(const int*)ctx); } |
| STAGE(mirror_y) { g = mirror(g, *(const int*)ctx); } |
| |
| STAGE(top_left) { |
| auto sc = (SkImageShaderContext*)ctx; |
| |
| r.store(sc->x); |
| g.store(sc->y); |
| |
| r -= 0.5f; |
| g -= 0.5f; |
| |
| auto fx = r - r.floor(), |
| fy = g - g.floor(); |
| ((1.0f - fx) * (1.0f - fy)).store(sc->scale); |
| }; |
| STAGE(top_right) { |
| auto sc = (SkImageShaderContext*)ctx; |
| |
| r = SkNf::Load(sc->x) + 0.5f; |
| g = SkNf::Load(sc->y) - 0.5f; |
| |
| auto fx = r - r.floor(), |
| fy = g - g.floor(); |
| (fx * (1.0f - fy)).store(sc->scale); |
| }; |
| STAGE(bottom_left) { |
| auto sc = (SkImageShaderContext*)ctx; |
| |
| r = SkNf::Load(sc->x) - 0.5f; |
| g = SkNf::Load(sc->y) + 0.5f; |
| |
| auto fx = r - r.floor(), |
| fy = g - g.floor(); |
| ((1.0f - fx) * fy).store(sc->scale); |
| }; |
| STAGE(bottom_right) { |
| auto sc = (SkImageShaderContext*)ctx; |
| |
| r = SkNf::Load(sc->x) + 0.5f; |
| g = SkNf::Load(sc->y) + 0.5f; |
| |
| auto fx = r - r.floor(), |
| fy = g - g.floor(); |
| (fx * fy).store(sc->scale); |
| }; |
| STAGE(accumulate) { |
| auto sc = (const SkImageShaderContext*)ctx; |
| |
| auto scale = SkNf::Load(sc->scale); |
| dr = SkNx_fma(scale, r, dr); |
| dg = SkNx_fma(scale, g, dg); |
| db = SkNx_fma(scale, b, db); |
| da = SkNx_fma(scale, a, da); |
| } |
| |
| template <typename T> |
| SI SkNi offset_and_ptr(T** ptr, const void* ctx, const SkNf& x, const SkNf& y) { |
| auto sc = (const SkImageShaderContext*)ctx; |
| |
| SkNi ix = SkNx_cast<int>(x), |
| iy = SkNx_cast<int>(y); |
| SkNi offset = iy*sc->stride + ix; |
| |
| *ptr = (const T*)sc->pixels; |
| return offset; |
| } |
| |
| STAGE(gather_a8) { |
| const uint8_t* p; |
| SkNi offset = offset_and_ptr(&p, ctx, r, g); |
| |
| r = g = b = 0.0f; |
| a = SkNx_cast<float>(gather(tail, p, offset)) * (1/255.0f); |
| } |
| STAGE(gather_i8) { |
| auto sc = (const SkImageShaderContext*)ctx; |
| const uint8_t* p; |
| SkNi offset = offset_and_ptr(&p, sc, r, g); |
| |
| SkNi ix = SkNx_cast<int>(gather(tail, p, offset)); |
| from_8888(gather(tail, sc->ctable->readColors(), ix), &r, &g, &b, &a); |
| } |
| STAGE(gather_g8) { |
| const uint8_t* p; |
| SkNi offset = offset_and_ptr(&p, ctx, r, g); |
| |
| r = g = b = SkNx_cast<float>(gather(tail, p, offset)) * (1/255.0f); |
| a = 1.0f; |
| } |
| STAGE(gather_565) { |
| const uint16_t* p; |
| SkNi offset = offset_and_ptr(&p, ctx, r, g); |
| |
| from_565(gather(tail, p, offset), &r, &g, &b); |
| a = 1.0f; |
| } |
| STAGE(gather_4444) { |
| const uint16_t* p; |
| SkNi offset = offset_and_ptr(&p, ctx, r, g); |
| |
| from_4444(gather(tail, p, offset), &r, &g, &b, &a); |
| } |
| STAGE(gather_8888) { |
| const uint32_t* p; |
| SkNi offset = offset_and_ptr(&p, ctx, r, g); |
| |
| from_8888(gather(tail, p, offset), &r, &g, &b, &a); |
| } |
| STAGE(gather_f16) { |
| const uint64_t* p; |
| SkNi offset = offset_and_ptr(&p, ctx, r, g); |
| |
| // f16 -> f32 conversion works best with tightly packed f16s, |
| // so we gather each component rather than using gather(). |
| uint16_t R[N], G[N], B[N], A[N]; |
| size_t n = tail ? tail : N; |
| for (size_t i = 0; i < n; i++) { |
| uint64_t rgba = p[offset[i]]; |
| R[i] = rgba >> 0; |
| G[i] = rgba >> 16; |
| B[i] = rgba >> 32; |
| A[i] = rgba >> 48; |
| } |
| for (size_t i = n; i < N; i++) { |
| R[i] = G[i] = B[i] = A[i] = 0; |
| } |
| r = SkHalfToFloat_finite_ftz(SkNh::Load(R)); |
| g = SkHalfToFloat_finite_ftz(SkNh::Load(G)); |
| b = SkHalfToFloat_finite_ftz(SkNh::Load(B)); |
| a = SkHalfToFloat_finite_ftz(SkNh::Load(A)); |
| } |
| |
| |
| SI Fn enum_to_Fn(SkRasterPipeline::StockStage st) { |
| switch (st) { |
| #define M(stage) case SkRasterPipeline::stage: return stage; |
| SK_RASTER_PIPELINE_STAGES(M) |
| #undef M |
| } |
| SkASSERT(false); |
| return just_return; |
| } |
| |
| namespace SK_OPTS_NS { |
| |
| struct Memset16 { |
| uint16_t** dst; |
| uint16_t val; |
| void operator()(size_t x, size_t, size_t n) { sk_memset16(*dst + x, val, n); } |
| }; |
| struct Memset32 { |
| uint32_t** dst; |
| uint32_t val; |
| void operator()(size_t x, size_t, size_t n) { sk_memset32(*dst + x, val, n); } |
| }; |
| struct Memset64 { |
| uint64_t** dst; |
| uint64_t val; |
| void operator()(size_t x, size_t, size_t n) { sk_memset64(*dst + x, val, n); } |
| }; |
| |
| SI std::function<void(size_t, size_t, size_t)> |
| compile_pipeline(const SkRasterPipeline::Stage* stages, int nstages) { |
| if (nstages == 2 && stages[0].stage == SkRasterPipeline::constant_color) { |
| SkPM4f src = *(const SkPM4f*)stages[0].ctx; |
| void* dst = stages[1].ctx; |
| switch (stages[1].stage) { |
| case SkRasterPipeline::store_565: |
| return Memset16{(uint16_t**)dst, SkPackRGB16(src.r() * SK_R16_MASK + 0.5f, |
| src.g() * SK_G16_MASK + 0.5f, |
| src.b() * SK_B16_MASK + 0.5f)}; |
| case SkRasterPipeline::store_8888: |
| return Memset32{(uint32_t**)dst, Sk4f_toL32(src.to4f())}; |
| |
| case SkRasterPipeline::store_f16: |
| return Memset64{(uint64_t**)dst, src.toF16()}; |
| |
| default: break; |
| } |
| } |
| |
| struct Compiled { |
| Compiled(const SkRasterPipeline::Stage* stages, int nstages) { |
| if (nstages == 0) { |
| return; |
| } |
| fStart = enum_to_Fn(stages[0].stage); |
| for (int i = 0; i < nstages-1; i++) { |
| fStages[i].next = enum_to_Fn(stages[i+1].stage); |
| fStages[i].ctx = stages[i].ctx; |
| } |
| fStages[nstages-1].next = just_return; |
| fStages[nstages-1].ctx = stages[nstages-1].ctx; |
| } |
| |
| void operator()(size_t x, size_t y, size_t n) { |
| float dx[] = { 0,1,2,3,4,5,6,7 }; |
| SkNf X = SkNf(x) + SkNf::Load(dx) + 0.5f, |
| Y = SkNf(y) + 0.5f, |
| _0 = SkNf(0), |
| _1 = SkNf(1); |
| |
| while (n >= N) { |
| fStart(fStages, x*N, X,Y,_1,_0, _0,_0,_0,_0); |
| X += (float)N; |
| x += N; |
| n -= N; |
| } |
| if (n) { |
| fStart(fStages, x*N+n, X,Y,_1,_0, _0,_0,_0,_0); |
| } |
| } |
| |
| Fn fStart = just_return; |
| Stage fStages[SkRasterPipeline::kMaxStages]; |
| |
| } fn { stages, nstages }; |
| return fn; |
| } |
| |
| } // namespace SK_OPTS_NS |
| |
| #undef SI |
| #undef STAGE |
| #undef RGBA_XFERMODE |
| #undef RGB_XFERMODE |
| |
| #endif//SkRasterPipeline_opts_DEFINED |