+++ /dev/null
-/*
- * 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 "SkMSAN.h"
-#include "SkPM4f.h"
-#include "SkPM4fPriv.h"
-#include "SkRasterPipeline.h"
-#include "SkShader.h"
-#include "SkSRGB.h"
-#include "../jumper/SkJumper.h"
-
-namespace {
-
- static constexpr int N = 4;
-
- 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>;
-
- using Fn = void(SK_VECTORCALL *)(size_t x_tail, void** p, SkNf,SkNf,SkNf,SkNf,
- SkNf,SkNf,SkNf,SkNf);
- // 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.
- //
- // p is our program, a sequence of Fn to call interlaced with any void* context pointers. E.g.
- // &load_8888
- // (src ptr)
- // &from_srgb
- // &move_src_dst
- // &load_f16
- // (dst ptr)
- // &swap
- // &srcover
- // &store_f16
- // (dst ptr)
- // &just_return
-
-} // namespace
-
-#define SI static inline
-
-// Basically, return *(*ptr)++, maybe faster than the compiler can do it.
-SI void* load_and_increment(void*** ptr) {
- // We do this often enough that it's worth hyper-optimizing.
- // x86 can do this in one instruction if ptr is in rsi.
- // (This is why p is the second argument to Fn: it's passed in rsi.)
-#if defined(__GNUC__) && defined(__x86_64__)
- void* rax;
- __asm__("lodsq" : "=a"(rax), "+S"(*ptr));
- return rax;
-#else
- return *(*ptr)++;
-#endif
-}
-
-// 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(size_t x_tail, void** p, SkNf r, SkNf g, SkNf b, SkNf a,
- SkNf dr, SkNf dg, SkNf db, SkNf da) {
- auto next = (Fn)load_and_increment(&p);
- next(x_tail,p, 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(size_t, void**, SkNf, SkNf, SkNf, SkNf,
- SkNf, SkNf, SkNf, SkNf) {}
-
-#define STAGE(name) \
- static SK_ALWAYS_INLINE void name##_kernel(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(size_t x_tail, void** p, \
- SkNf r, SkNf g, SkNf b, SkNf a, \
- SkNf dr, SkNf dg, SkNf db, SkNf da) { \
- name##_kernel(x_tail/N, x_tail%N, r,g,b,a, dr,dg,db,da); \
- next(x_tail,p, r,g,b,a, dr,dg,db,da); \
- } \
- static SK_ALWAYS_INLINE void name##_kernel(size_t x, size_t tail, \
- SkNf& r, SkNf& g, SkNf& b, SkNf& a, \
- SkNf& dr, SkNf& dg, SkNf& db, SkNf& da)
-
-#define STAGE_CTX(name, Ctx) \
- static SK_ALWAYS_INLINE void name##_kernel(Ctx 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(size_t x_tail, void** p, \
- SkNf r, SkNf g, SkNf b, SkNf a, \
- SkNf dr, SkNf dg, SkNf db, SkNf da) { \
- auto ctx = (Ctx)load_and_increment(&p); \
- name##_kernel(ctx, x_tail/N, x_tail%N, r,g,b,a, dr,dg,db,da); \
- next(x_tail,p, r,g,b,a, dr,dg,db,da); \
- } \
- static SK_ALWAYS_INLINE void name##_kernel(Ctx 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(size_t x_tail, void** p, \
- 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(x_tail,p, 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(size_t x_tail, void** p, \
- 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(x_tail,p, 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];
- memset(buf, 0, 8*sizeof(T));
- 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);
-}
-
-SI SkNf SkNf_fma(const SkNf& f, const SkNf& m, const SkNf& a) { return SkNx_fma(f,m,a); }
-
-SI SkNi SkNf_round(const SkNf& x, const SkNf& scale) {
- // Every time I try, _mm_cvtps_epi32 benches as slower than using FMA and _mm_cvttps_epi32. :/
- return SkNx_cast<int>(SkNf_fma(x,scale, 0.5f));
-}
-
-SI SkNf SkNf_from_byte(const SkNi& x) {
- // Same trick as in store_8888: 0x470000BB == 32768.0f + BB/256.0f for all bytes BB.
- auto v = 0x47000000 | x;
- // Read this as (pun_float(v) - 32768.0f) * (256/255.0f), redistributed to be an FMA.
- return SkNf_fma(SkNf::Load(&v), 256/255.0f, -32768*256/255.0f);
-}
-SI SkNf SkNf_from_byte(const SkNu& x) { return SkNf_from_byte(SkNi::Load(&x)); }
-SI SkNf SkNf_from_byte(const SkNb& x) { return SkNf_from_byte(SkNx_cast<int>(x)); }
-
-SI void from_8888(const SkNu& _8888, SkNf* r, SkNf* g, SkNf* b, SkNf* a) {
- *r = SkNf_from_byte((_8888 ) & 0xff);
- *g = SkNf_from_byte((_8888 >> 8) & 0xff);
- *b = SkNf_from_byte((_8888 >> 16) & 0xff);
- *a = SkNf_from_byte((_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);
-}
-SI void from_f16(const void* px, SkNf* r, SkNf* g, SkNf* b, SkNf* a) {
- SkNh rh, gh, bh, ah;
- SkNh::Load4(px, &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(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_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(clamp_a) {
- a = SkNf::Min(a, 1.0f);
- r = SkNf::Min(r, a);
- g = SkNf::Min(g, a);
- b = SkNf::Min(b, a);
-}
-
-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_CTX(set_rgb, const float*) {
- r = ctx[0];
- g = ctx[1];
- b = ctx[2];
-}
-STAGE(swap_rb) { SkTSwap(r,b); }
-
-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) {
- SkTSwap(r,dr);
- SkTSwap(g,dg);
- SkTSwap(b,db);
- SkTSwap(a,da);
-}
-
-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(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);
-}
-
-STAGE(from_2dot2) {
- auto from_2dot2 = [](const SkNf& x) {
- // x^(141/64) = x^(2.20312) is a great approximation of the true value, x^(2.2).
- // (note: x^(35/16) = x^(2.1875) is an okay one as well and would be quicker)
- auto x16 = x.rsqrt().rsqrt().rsqrt().rsqrt(); // x^(1/16) = x^(4/64);
- auto x64 = x16.rsqrt().rsqrt(); // x^(1/64)
-
- // x^(141/64) = x^(128/64) * x^(12/64) * x^(1/64)
- return SkNf::Max((x*x) * (x16*x16*x16) * (x64), 0.0f);
- };
-
- r = from_2dot2(r);
- g = from_2dot2(g);
- b = from_2dot2(b);
-}
-STAGE(to_2dot2) {
- auto to_2dot2 = [](const SkNf& x) {
- // x^(29/64) is a very good approximation of the true value, x^(1/2.2).
- auto x2 = x.rsqrt(), // x^(-1/2)
- x32 = x2.rsqrt().rsqrt().rsqrt().rsqrt(), // x^(-1/32)
- x64 = x32.rsqrt(); // x^(+1/64)
-
- // 29 = 32 - 2 - 1
- return SkNf::Max(x2.invert() * x32 * x64.invert(), 0.0f); // Watch out for NaN.
- };
-
- r = to_2dot2(r);
- g = to_2dot2(g);
- b = to_2dot2(b);
-}
-
-// The default shader produces a constant color (from the SkPaint).
-STAGE_CTX(constant_color, const SkPM4f*) {
- r = ctx->r();
- g = ctx->g();
- b = ctx->b();
- a = ctx->a();
-}
-
-// Set up registers with values relevant to shaders.
-STAGE_CTX(seed_shader, const int*) {
- int y = *ctx;
-
- static const float dx[] = { 0,1,2,3,4,5,6,7 };
- r = x + 0.5f + SkNf::Load(dx); // dst pixel center x coordinates
- g = y + 0.5f; // dst pixel center y coordinate(s)
- b = 1.0f;
- a = 0.0f;
- dr = dg = db = da = 0.0f;
-}
-
-// s' = sc for a scalar c.
-STAGE_CTX(scale_1_float, const float*) {
- SkNf c = *ctx;
-
- r *= c;
- g *= c;
- b *= c;
- a *= c;
-}
-// s' = sc for 8-bit c.
-STAGE_CTX(scale_u8, const uint8_t**) {
- auto ptr = *ctx + x;
- SkNf c = SkNf_from_byte(load(tail, ptr));
-
- 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 SkNf_fma(to-from, cov, from);
-}
-
-// s' = d(1-c) + sc, for a scalar c.
-STAGE_CTX(lerp_1_float, const float*) {
- SkNf c = *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_CTX(lerp_u8, const uint8_t**) {
- auto ptr = *ctx + x;
- SkNf c = SkNf_from_byte(load(tail, ptr));
-
- 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_CTX(lerp_565, const uint16_t**) {
- auto ptr = *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_CTX(load_a8, const uint8_t**) {
- auto ptr = *ctx + x;
- r = g = b = 0.0f;
- a = SkNf_from_byte(load(tail, ptr));
-}
-STAGE_CTX(store_a8, uint8_t**) {
- auto ptr = *ctx + x;
- store(tail, SkNx_cast<uint8_t>(SkNf_round(255.0f, a)), ptr);
-}
-
-STAGE_CTX(load_g8, const uint8_t**) {
- auto ptr = *ctx + x;
- r = g = b = SkNf_from_byte(load(tail, ptr));
- a = 1.0f;
-}
-
-STAGE_CTX(load_565, const uint16_t**) {
- auto ptr = *ctx + x;
- from_565(load(tail, ptr), &r,&g,&b);
- a = 1.0f;
-}
-STAGE_CTX(store_565, uint16_t**) {
- auto ptr = *ctx + x;
- store(tail, SkNx_cast<uint16_t>( SkNf_round(r, SK_R16_MASK) << SK_R16_SHIFT
- | SkNf_round(g, SK_G16_MASK) << SK_G16_SHIFT
- | SkNf_round(b, SK_B16_MASK) << SK_B16_SHIFT), ptr);
-}
-
-STAGE_CTX(load_4444, const uint16_t**) {
- auto ptr = *ctx + x;
- from_4444(load(tail, ptr), &r,&g,&b,&a);
-}
-STAGE_CTX(store_4444, uint16_t**) {
- auto ptr = *ctx + x;
- store(tail, SkNx_cast<uint16_t>( SkNf_round(r, 0xF) << SK_R4444_SHIFT
- | SkNf_round(g, 0xF) << SK_G4444_SHIFT
- | SkNf_round(b, 0xF) << SK_B4444_SHIFT
- | SkNf_round(a, 0xF) << SK_A4444_SHIFT), ptr);
-}
-
-STAGE_CTX(load_f16, const uint64_t**) {
- auto ptr = *ctx + x;
-
- const void* src = ptr;
- SkNx<N, uint64_t> px;
- if (tail) {
- px = load(tail, ptr);
- src = &px;
- }
- from_f16(src, &r, &g, &b, &a);
-}
-STAGE_CTX(store_f16, uint64_t**) {
- auto ptr = *ctx + x;
-
- SkNx<N, uint64_t> px;
- SkNh::Store4(tail ? (void*)&px : (void*)ptr, SkFloatToHalf_finite_ftz(r),
- SkFloatToHalf_finite_ftz(g),
- SkFloatToHalf_finite_ftz(b),
- SkFloatToHalf_finite_ftz(a));
- if (tail) {
- store(tail, px, ptr);
- }
-}
-
-STAGE_CTX(load_f32, const SkPM4f**) {
- auto ptr = *ctx + x;
-
- const void* src = ptr;
- SkNx<N, SkPM4f> px;
- if (tail) {
- px = load(tail, ptr);
- src = &px;
- }
- SkNf::Load4(src, &r, &g, &b, &a);
-}
-STAGE_CTX(store_f32, SkPM4f**) {
- auto ptr = *ctx + x;
-
- SkNx<N, SkPM4f> px;
- SkNf::Store4(tail ? (void*)&px : (void*)ptr, r,g,b,a);
- if (tail) {
- store(tail, px, ptr);
- }
-}
-
-
-STAGE_CTX(load_8888, const uint32_t**) {
- auto ptr = *ctx + x;
- from_8888(load(tail, ptr), &r, &g, &b, &a);
-}
-STAGE_CTX(store_8888, uint32_t**) {
- auto byte = [](const SkNf& x, int ix) {
- // Here's a neat trick: 0x47000000 == 32768.0f, and 0x470000ff == 32768.0f + (255/256.0f).
- auto v = SkNf_fma(255/256.0f, x, 32768.0f);
- switch (ix) {
- case 0: return SkNi::Load(&v) & 0xff; // R
- case 3: return SkNi::Load(&v) << 24; // A
- }
- return (SkNi::Load(&v) & 0xff) << (8*ix); // B or G
- };
-
- auto ptr = *ctx + x;
- store(tail, byte(r,0)|byte(g,1)|byte(b,2)|byte(a,3), (int*)ptr);
-}
-
-STAGE_CTX(load_u16_be, const uint64_t**) {
- auto ptr = *ctx + x;
- const void* src = ptr;
- SkNx<N, uint64_t> px;
- if (tail) {
- px = load(tail, ptr);
- src = &px;
- }
-
- SkNh rh, gh, bh, ah;
- SkNh::Load4(src, &rh, &gh, &bh, &ah);
- r = (1.0f / 65535.0f) * SkNx_cast<float>((rh << 8) | (rh >> 8));
- g = (1.0f / 65535.0f) * SkNx_cast<float>((gh << 8) | (gh >> 8));
- b = (1.0f / 65535.0f) * SkNx_cast<float>((bh << 8) | (bh >> 8));
- a = (1.0f / 65535.0f) * SkNx_cast<float>((ah << 8) | (ah >> 8));
-}
-
-STAGE_CTX(load_rgb_u16_be, const uint16_t**) {
- auto ptr = *ctx + 3*x;
- const void* src = ptr;
- uint16_t buf[N*3] = {0};
- if (tail) {
- memcpy(buf, src, tail*3*sizeof(uint16_t));
- src = buf;
- }
-
- SkNh rh, gh, bh;
- SkNh::Load3(src, &rh, &gh, &bh);
- r = (1.0f / 65535.0f) * SkNx_cast<float>((rh << 8) | (rh >> 8));
- g = (1.0f / 65535.0f) * SkNx_cast<float>((gh << 8) | (gh >> 8));
- b = (1.0f / 65535.0f) * SkNx_cast<float>((bh << 8) | (bh >> 8));
- a = 1.0f;
-}
-
-STAGE_CTX(store_u16_be, uint64_t**) {
- auto to_u16_be = [](const SkNf& x) {
- SkNh x16 = SkNx_cast<uint16_t>(65535.0f * x);
- return (x16 << 8) | (x16 >> 8);
- };
-
- auto ptr = *ctx + x;
- SkNx<N, uint64_t> px;
- SkNh::Store4(tail ? (void*)&px : (void*)ptr, to_u16_be(r),
- to_u16_be(g),
- to_u16_be(b),
- to_u16_be(a));
- if (tail) {
- store(tail, px, ptr);
- }
-}
-
-STAGE_CTX(load_tables, const LoadTablesContext*) {
- auto ptr = (const uint32_t*)ctx->fSrc + x;
-
- SkNu rgba = load(tail, ptr);
- auto to_int = [](const SkNu& v) { return SkNi::Load(&v); };
- r = gather(tail, ctx->fR, to_int((rgba >> 0) & 0xff));
- g = gather(tail, ctx->fG, to_int((rgba >> 8) & 0xff));
- b = gather(tail, ctx->fB, to_int((rgba >> 16) & 0xff));
- a = SkNf_from_byte(rgba >> 24);
-}
-
-STAGE_CTX(load_tables_u16_be, const LoadTablesContext*) {
- auto ptr = (const uint64_t*)ctx->fSrc + x;
- const void* src = ptr;
- SkNx<N, uint64_t> px;
- if (tail) {
- px = load(tail, ptr);
- src = &px;
- }
-
- SkNh rh, gh, bh, ah;
- SkNh::Load4(src, &rh, &gh, &bh, &ah);
-
- // ctx->fSrc is big-endian, so "& 0xff" grabs the 8 most significant bits of each component.
- r = gather(tail, ctx->fR, SkNx_cast<int>(rh & 0xff));
- g = gather(tail, ctx->fG, SkNx_cast<int>(gh & 0xff));
- b = gather(tail, ctx->fB, SkNx_cast<int>(bh & 0xff));
- a = (1.0f / 65535.0f) * SkNx_cast<float>((ah << 8) | (ah >> 8));
-}
-
-STAGE_CTX(load_tables_rgb_u16_be, const LoadTablesContext*) {
- auto ptr = (const uint16_t*)ctx->fSrc + 3*x;
- const void* src = ptr;
- uint16_t buf[N*3] = {0};
- if (tail) {
- memcpy(buf, src, tail*3*sizeof(uint16_t));
- src = buf;
- }
-
- SkNh rh, gh, bh;
- SkNh::Load3(src, &rh, &gh, &bh);
-
- // ctx->fSrc is big-endian, so "& 0xff" grabs the 8 most significant bits of each component.
- r = gather(tail, ctx->fR, SkNx_cast<int>(rh & 0xff));
- g = gather(tail, ctx->fG, SkNx_cast<int>(gh & 0xff));
- b = gather(tail, ctx->fB, SkNx_cast<int>(bh & 0xff));
- a = 1.0f;
-}
-
-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 SkNf_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(rgb_to_hsl) {
- auto max = SkNf::Max(SkNf::Max(r, g), b);
- auto min = SkNf::Min(SkNf::Min(r, g), b);
- auto l = 0.5f * (max + min);
-
- auto d = max - min;
- auto d_inv = 1.0f/d;
- auto s = (max == min).thenElse(0.0f,
- d/(l > 0.5f).thenElse(2.0f - max - min, max + min));
- SkNf h = (max != r).thenElse(0.0f,
- (g - b)*d_inv + (g < b).thenElse(6.0f, 0.0f));
- h = (max == g).thenElse((b - r)*d_inv + 2.0f, h);
- h = (max == b).thenElse((r - g)*d_inv + 4.0f, h);
- h *= (1/6.0f);
-
- h = (max == min).thenElse(0.0f, h);
-
- r = h;
- g = s;
- b = l;
-}
-
-STAGE(hsl_to_rgb) {
- auto h = r;
- auto s = g;
- auto l = b;
- auto q = (l < 0.5f).thenElse(l*(1.0f + s), l + s - l*s);
- auto p = 2.0f*l - q;
-
- auto hue_to_rgb = [](const SkNf& p, const SkNf& q, const SkNf& t) {
- auto t2 = (t < 0.0f).thenElse(t + 1.0f, (t > 1.0f).thenElse(t - 1.0f, t));
- return (t2 < (1/6.0f)).thenElse(
- p + (q - p)*6.0f*t, (t2 < (3/6.0f)).thenElse(
- q, (t2 < (4/6.0f)).thenElse(
- p + (q - p)*((4/6.0f) - t2)*6.0f, p)));
- };
-
- r = (s == 0.f).thenElse(l, hue_to_rgb(p, q, h + (1/3.0f)));
- g = (s == 0.f).thenElse(l, hue_to_rgb(p, q, h));
- b = (s == 0.f).thenElse(l, hue_to_rgb(p, q, h - (1/3.0f)));
-}
-
-STAGE_CTX(matrix_2x3, const float*) {
- auto m = ctx;
-
- auto R = SkNf_fma(r,m[0], SkNf_fma(g,m[2], m[4])),
- G = SkNf_fma(r,m[1], SkNf_fma(g,m[3], m[5]));
- r = R;
- g = G;
-}
-STAGE_CTX(matrix_3x4, const float*) {
- auto m = ctx;
-
- auto R = SkNf_fma(r,m[0], SkNf_fma(g,m[3], SkNf_fma(b,m[6], m[ 9]))),
- G = SkNf_fma(r,m[1], SkNf_fma(g,m[4], SkNf_fma(b,m[7], m[10]))),
- B = SkNf_fma(r,m[2], SkNf_fma(g,m[5], SkNf_fma(b,m[8], m[11])));
- r = R;
- g = G;
- b = B;
-}
-STAGE_CTX(matrix_4x5, const float*) {
- auto m = ctx;
-
- auto R = SkNf_fma(r,m[0], SkNf_fma(g,m[4], SkNf_fma(b,m[ 8], SkNf_fma(a,m[12], m[16])))),
- G = SkNf_fma(r,m[1], SkNf_fma(g,m[5], SkNf_fma(b,m[ 9], SkNf_fma(a,m[13], m[17])))),
- B = SkNf_fma(r,m[2], SkNf_fma(g,m[6], SkNf_fma(b,m[10], SkNf_fma(a,m[14], m[18])))),
- A = SkNf_fma(r,m[3], SkNf_fma(g,m[7], SkNf_fma(b,m[11], SkNf_fma(a,m[15], m[19]))));
- r = R;
- g = G;
- b = B;
- a = A;
-}
-STAGE_CTX(matrix_perspective, const float*) {
- // N.B. unlike the matrix_NxM stages, this takes a row-major matrix.
- auto m = ctx;
-
- auto R = SkNf_fma(r,m[0], SkNf_fma(g,m[1], m[2])),
- G = SkNf_fma(r,m[3], SkNf_fma(g,m[4], m[5])),
- Z = SkNf_fma(r,m[6], SkNf_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.fC * s + p.fF
- : powf(s * p.fA + p.fB, p.fG) + p.fE;
- }
- // Clamp the output to [0, 1].
- // Max(NaN, 0) = 0, but Max(0, NaN) = NaN, so we want this exact order to ensure NaN => 0
- return SkNf::Min(SkNf::Max(SkNf::Load(result), 0.0f), 1.0f);
-}
-STAGE_CTX(parametric_r, const SkColorSpaceTransferFn*) { r = parametric(r, *ctx); }
-STAGE_CTX(parametric_g, const SkColorSpaceTransferFn*) { g = parametric(g, *ctx); }
-STAGE_CTX(parametric_b, const SkColorSpaceTransferFn*) { b = parametric(b, *ctx); }
-STAGE_CTX(parametric_a, const SkColorSpaceTransferFn*) { a = parametric(a, *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);
- }
- // no need to clamp - tables are by-design [0,1] -> [0,1]
- return SkNf::Load(result);
-}
-STAGE_CTX(table_r, const SkTableTransferFn*) { r = table(r, *ctx); }
-STAGE_CTX(table_g, const SkTableTransferFn*) { g = table(g, *ctx); }
-STAGE_CTX(table_b, const SkTableTransferFn*) { b = table(b, *ctx); }
-STAGE_CTX(table_a, const SkTableTransferFn*) { a = table(a, *ctx); }
-
-STAGE_CTX(color_lookup_table, const SkColorLookUpTable*) {
- const SkColorLookUpTable* colorLUT = ctx;
- SkASSERT(3 == colorLUT->inputChannels() || 4 == colorLUT->inputChannels());
- SkASSERT(3 == colorLUT->outputChannels());
- float result[3][N];
- for (int i = 0; i < N; ++i) {
- const float in[4] = { r[i], g[i], b[i], a[i] };
- float out[3];
- colorLUT->interp(out, in);
- for (int j = 0; j < colorLUT->outputChannels(); ++j) {
- result[j][i] = out[j];
- }
- }
- r = SkNf::Load(result[0]);
- g = SkNf::Load(result[1]);
- b = SkNf::Load(result[2]);
- if (4 == colorLUT->inputChannels()) {
- // we must set the pixel to opaque, as the alpha channel was used
- // as input before this.
- a = 1.f;
- }
-}
-
-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 ulp_before(float v) {
- SkASSERT(v > 0);
- SkNf vs(v);
- SkNu uvs = SkNu::Load(&vs) - 1;
- return SkNf::Load(&uvs);
-}
-
-SI SkNf clamp(const SkNf& v, float limit) {
- SkNf result = SkNf::Max(0, SkNf::Min(v, ulp_before(limit)));
- 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, ulp_before(limit));
- 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, ulp_before(l));
- return assert_in_tile(result, l);
-}
-STAGE_CTX( clamp_x, const float*) { r = clamp (r, *ctx); }
-STAGE_CTX(repeat_x, const float*) { r = repeat(r, *ctx); }
-STAGE_CTX(mirror_x, const float*) { r = mirror(r, *ctx); }
-STAGE_CTX( clamp_y, const float*) { g = clamp (g, *ctx); }
-STAGE_CTX(repeat_y, const float*) { g = repeat(g, *ctx); }
-STAGE_CTX(mirror_y, const float*) { g = mirror(g, *ctx); }
-
-STAGE_CTX(save_xy, SkJumper_SamplerCtx*) {
- r.store(ctx->x);
- g.store(ctx->y);
-
- // Whether bilinear or bicubic, all sample points have the same fractional offset (fx,fy).
- // They're either the 4 corners of a logical 1x1 pixel or the 16 corners of a 3x3 grid
- // surrounding (x,y), all (0.5,0.5) off-center.
- auto fract = [](const SkNf& v) { return v - v.floor(); };
- fract(r + 0.5f).store(ctx->fx);
- fract(g + 0.5f).store(ctx->fy);
-}
-
-STAGE_CTX(accumulate, const SkJumper_SamplerCtx*) {
- // Bilinear and bicubic filtering are both separable, so we'll end up with independent
- // scale contributions in x and y that we multiply together to get each pixel's scale factor.
- auto scale = SkNf::Load(ctx->scalex) * SkNf::Load(ctx->scaley);
- dr = SkNf_fma(scale, r, dr);
- dg = SkNf_fma(scale, g, dg);
- db = SkNf_fma(scale, b, db);
- da = SkNf_fma(scale, a, da);
-}
-
-// In bilinear interpolation, the 4 pixels at +/- 0.5 offsets from the sample pixel center
-// are combined in direct proportion to their area overlapping that logical query pixel.
-// At positive offsets, the x-axis contribution to that rectangular area is fx; (1-fx)
-// at negative x offsets. The y-axis is treated symmetrically.
-template <int Scale>
-SI void bilinear_x(SkJumper_SamplerCtx* ctx, SkNf* x) {
- *x = SkNf::Load(ctx->x) + Scale*0.5f;
- auto fx = SkNf::Load(ctx->fx);
- (Scale > 0 ? fx : (1.0f - fx)).store(ctx->scalex);
-}
-template <int Scale>
-SI void bilinear_y(SkJumper_SamplerCtx* ctx, SkNf* y) {
- *y = SkNf::Load(ctx->y) + Scale*0.5f;
- auto fy = SkNf::Load(ctx->fy);
- (Scale > 0 ? fy : (1.0f - fy)).store(ctx->scaley);
-}
-STAGE_CTX(bilinear_nx, SkJumper_SamplerCtx*) { bilinear_x<-1>(ctx, &r); }
-STAGE_CTX(bilinear_px, SkJumper_SamplerCtx*) { bilinear_x<+1>(ctx, &r); }
-STAGE_CTX(bilinear_ny, SkJumper_SamplerCtx*) { bilinear_y<-1>(ctx, &g); }
-STAGE_CTX(bilinear_py, SkJumper_SamplerCtx*) { bilinear_y<+1>(ctx, &g); }
-
-
-// In bilinear interpolation, the 16 pixels at +/- 0.5 and +/- 1.5 offsets from the sample
-// pixel center are combined with a non-uniform cubic filter, with high filter values near
-// the center and lower values farther away.
-//
-// We break this filter function into two parts, one for near +/- 0.5 offsets,
-// and one for far +/- 1.5 offsets.
-//
-// See GrBicubicEffect for details about this particular Mitchell-Netravali filter.
-SI SkNf bicubic_near(const SkNf& t) {
- // 1/18 + 9/18t + 27/18t^2 - 21/18t^3 == t ( t ( -21/18t + 27/18) + 9/18) + 1/18
- return SkNf_fma(t, SkNf_fma(t, SkNf_fma(-21/18.0f, t, 27/18.0f), 9/18.0f), 1/18.0f);
-}
-SI SkNf bicubic_far(const SkNf& t) {
- // 0/18 + 0/18*t - 6/18t^2 + 7/18t^3 == t^2 (7/18t - 6/18)
- return (t*t)*SkNf_fma(7/18.0f, t, -6/18.0f);
-}
-
-template <int Scale>
-SI void bicubic_x(SkJumper_SamplerCtx* ctx, SkNf* x) {
- *x = SkNf::Load(ctx->x) + Scale*0.5f;
- auto fx = SkNf::Load(ctx->fx);
- if (Scale == -3) { return bicubic_far (1.0f - fx).store(ctx->scalex); }
- if (Scale == -1) { return bicubic_near(1.0f - fx).store(ctx->scalex); }
- if (Scale == +1) { return bicubic_near( fx).store(ctx->scalex); }
- if (Scale == +3) { return bicubic_far ( fx).store(ctx->scalex); }
- SkDEBUGFAIL("unreachable");
-}
-template <int Scale>
-SI void bicubic_y(SkJumper_SamplerCtx* ctx, SkNf* y) {
- *y = SkNf::Load(ctx->y) + Scale*0.5f;
- auto fy = SkNf::Load(ctx->fy);
- if (Scale == -3) { return bicubic_far (1.0f - fy).store(ctx->scaley); }
- if (Scale == -1) { return bicubic_near(1.0f - fy).store(ctx->scaley); }
- if (Scale == +1) { return bicubic_near( fy).store(ctx->scaley); }
- if (Scale == +3) { return bicubic_far ( fy).store(ctx->scaley); }
- SkDEBUGFAIL("unreachable");
-}
-STAGE_CTX(bicubic_n3x, SkJumper_SamplerCtx*) { bicubic_x<-3>(ctx, &r); }
-STAGE_CTX(bicubic_n1x, SkJumper_SamplerCtx*) { bicubic_x<-1>(ctx, &r); }
-STAGE_CTX(bicubic_p1x, SkJumper_SamplerCtx*) { bicubic_x<+1>(ctx, &r); }
-STAGE_CTX(bicubic_p3x, SkJumper_SamplerCtx*) { bicubic_x<+3>(ctx, &r); }
-
-STAGE_CTX(bicubic_n3y, SkJumper_SamplerCtx*) { bicubic_y<-3>(ctx, &g); }
-STAGE_CTX(bicubic_n1y, SkJumper_SamplerCtx*) { bicubic_y<-1>(ctx, &g); }
-STAGE_CTX(bicubic_p1y, SkJumper_SamplerCtx*) { bicubic_y<+1>(ctx, &g); }
-STAGE_CTX(bicubic_p3y, SkJumper_SamplerCtx*) { bicubic_y<+3>(ctx, &g); }
-
-
-template <typename T>
-SI SkNi offset_and_ptr(T** ptr, const SkJumper_GatherCtx* ctx, const SkNf& x, const SkNf& y) {
- SkNi ix = SkNx_cast<int>(x),
- iy = SkNx_cast<int>(y);
- SkNi offset = iy*ctx->stride + ix;
-
- *ptr = (const T*)ctx->pixels;
- return offset;
-}
-
-STAGE_CTX(gather_a8, const SkJumper_GatherCtx*) {
- const uint8_t* p;
- SkNi offset = offset_and_ptr(&p, ctx, r, g);
-
- r = g = b = 0.0f;
- a = SkNf_from_byte(gather(tail, p, offset));
-}
-STAGE_CTX(gather_i8, const SkJumper_GatherCtx*) {
- const uint8_t* p;
- SkNi offset = offset_and_ptr(&p, ctx, r, g);
-
- SkNi ix = SkNx_cast<int>(gather(tail, p, offset));
- from_8888(gather(tail, ctx->ctable, ix), &r, &g, &b, &a);
-}
-STAGE_CTX(gather_g8, const SkJumper_GatherCtx*) {
- const uint8_t* p;
- SkNi offset = offset_and_ptr(&p, ctx, r, g);
-
- r = g = b = SkNf_from_byte(gather(tail, p, offset));
- a = 1.0f;
-}
-STAGE_CTX(gather_565, const SkJumper_GatherCtx*) {
- 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_CTX(gather_4444, const SkJumper_GatherCtx*) {
- const uint16_t* p;
- SkNi offset = offset_and_ptr(&p, ctx, r, g);
-
- from_4444(gather(tail, p, offset), &r, &g, &b, &a);
-}
-STAGE_CTX(gather_8888, const SkJumper_GatherCtx*) {
- const uint32_t* p;
- SkNi offset = offset_and_ptr(&p, ctx, r, g);
-
- from_8888(gather(tail, p, offset), &r, &g, &b, &a);
-}
-STAGE_CTX(gather_f16, const SkJumper_GatherCtx*) {
- const uint64_t* p;
- SkNi offset = offset_and_ptr(&p, ctx, r, g);
-
- auto px = gather(tail, p, offset);
- from_f16(&px, &r, &g, &b, &a);
-}
-
-STAGE_CTX(linear_gradient, const SkPM4f*) {
- struct Stop { float pos; float f[4], b[4]; };
- struct Ctx { size_t n; Stop *stops; float start[4]; };
-
- auto c = (const Ctx*)ctx;
- SkNf fr = 0, fg = 0, fb = 0, fa = 0;
- SkNf br = c->start[0],
- bg = c->start[1],
- bb = c->start[2],
- ba = c->start[3];
- auto t = r;
- for (size_t i = 0; i < c->n; i++) {
- fr = (t < c->stops[i].pos).thenElse(fr, c->stops[i].f[0]);
- fg = (t < c->stops[i].pos).thenElse(fg, c->stops[i].f[1]);
- fb = (t < c->stops[i].pos).thenElse(fb, c->stops[i].f[2]);
- fa = (t < c->stops[i].pos).thenElse(fa, c->stops[i].f[3]);
- br = (t < c->stops[i].pos).thenElse(br, c->stops[i].b[0]);
- bg = (t < c->stops[i].pos).thenElse(bg, c->stops[i].b[1]);
- bb = (t < c->stops[i].pos).thenElse(bb, c->stops[i].b[2]);
- ba = (t < c->stops[i].pos).thenElse(ba, c->stops[i].b[3]);
- }
-
- r = SkNf_fma(t, fr, br);
- g = SkNf_fma(t, fg, bg);
- b = SkNf_fma(t, fb, bb);
- a = SkNf_fma(t, fa, ba);
-}
-
-STAGE_CTX(linear_gradient_2stops, const SkPM4f*) {
- auto t = r;
- SkPM4f c0 = ctx[0],
- dc = ctx[1];
-
- r = SkNf_fma(t, dc.r(), c0.r());
- g = SkNf_fma(t, dc.g(), c0.g());
- b = SkNf_fma(t, dc.b(), c0.b());
- a = SkNf_fma(t, dc.a(), c0.a());
-}
-
-STAGE_CTX(byte_tables, const void*) {
- struct Tables { const uint8_t *r, *g, *b, *a; };
- auto tables = (const Tables*)ctx;
-
- r = SkNf_from_byte(gather(tail, tables->r, SkNf_round(255.0f, r)));
- g = SkNf_from_byte(gather(tail, tables->g, SkNf_round(255.0f, g)));
- b = SkNf_from_byte(gather(tail, tables->b, SkNf_round(255.0f, b)));
- a = SkNf_from_byte(gather(tail, tables->a, SkNf_round(255.0f, a)));
-}
-
-STAGE_CTX(byte_tables_rgb, const void*) {
- struct Tables { const uint8_t *r, *g, *b; int n; };
- auto tables = (const Tables*)ctx;
-
- float scale = tables->n - 1;
- r = SkNf_from_byte(gather(tail, tables->r, SkNf_round(scale, r)));
- g = SkNf_from_byte(gather(tail, tables->g, SkNf_round(scale, g)));
- b = SkNf_from_byte(gather(tail, tables->b, SkNf_round(scale, b)));
-}
-
-STAGE_CTX(shader_adapter, SkShader::Context*) {
- SkPM4f buf[N];
- static_assert(sizeof(buf) == sizeof(r) + sizeof(g) + sizeof(b) + sizeof(a), "");
- ctx->shadeSpan4f(x, (int)g[0], buf, N);
- SkNf::Load4(buf, &r, &g, &b, &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 {
-
- static void build_program(void** program, const SkRasterPipeline::Stage* stages, int nstages) {
- for (int i = 0; i < nstages; i++) {
- *program++ = (void*)enum_to_Fn(stages[i].stage);
- if (stages[i].ctx) {
- *program++ = stages[i].ctx;
- }
- }
- *program++ = (void*)just_return;
- }
-
- static void run_program(void** program, size_t x, size_t n) {
-#if SK_BUILD_FOR_WINRT
- SkNf u = SkNf();
-#else
- SkNf u; // fastest to start uninitialized.
-#endif
-
- auto start = (Fn)load_and_increment(&program);
- while (n >= N) {
- start(x*N, program, u,u,u,u, u,u,u,u);
- x += N;
- n -= N;
- }
- if (n) {
- start(x*N+n, program, u,u,u,u, u,u,u,u);
- }
- }
-
- // Compiled manages its memory manually because it's not safe to use
- // std::vector, SkTDArray, etc without setting us up for big ODR violations.
- struct Compiled {
- Compiled(const SkRasterPipeline::Stage* stages, int nstages) {
- int slots = nstages + 1; // One extra for just_return.
- for (int i = 0; i < nstages; i++) {
- if (stages[i].ctx) {
- slots++;
- }
- }
- fProgram = (void**)sk_malloc_throw(slots * sizeof(void*));
- build_program(fProgram, stages, nstages);
- }
- ~Compiled() { sk_free(fProgram); }
-
- Compiled(const Compiled& o) {
- int slots = 0;
- while (o.fProgram[slots++] != (void*)just_return);
-
- fProgram = (void**)sk_malloc_throw(slots * sizeof(void*));
- memcpy(fProgram, o.fProgram, slots * sizeof(void*));
- }
-
- void operator()(size_t x, size_t n) {
- run_program(fProgram, x, n);
- }
-
- void** fProgram;
- };
-}
-
-namespace SK_OPTS_NS {
-
- SI void run_pipeline(size_t x, size_t n,
- const SkRasterPipeline::Stage* stages, int nstages) {
- static const int kStackMax = 256;
- // Worst case is nstages stages with nstages context pointers, and just_return.
- if (2*nstages+1 <= kStackMax) {
- void* program[kStackMax];
- build_program(program, stages, nstages);
- run_program(program, x,n);
- } else {
- Compiled{stages,nstages}(x,n);
- }
- }
-
-} // namespace SK_OPTS_NS
-
-#undef SI
-#undef STAGE
-#undef STAGE_CTX
-#undef RGBA_XFERMODE
-#undef RGB_XFERMODE
-
-#endif//SkRasterPipeline_opts_DEFINED
projects / platform / upstream / libSkiaSharp.git / commitdiff