Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / skia / 56b50792531c956be3e0c472b098255c62c7e755 / . / src / opts / SkRasterPipeline_opts.h
blob: 11447bcdf9fadfe0b8c133cf029284fb0b970c4c [file] [log] [blame]
/*
* 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 "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);
}
SI void store(size_t tail, const SkNi& v, int32_t* dst) {
tail ? _mm256_maskstore_epi32((int*)dst, mask(tail), v.fVec)
: v.store(dst);
}
SI void store(size_t tail, const SkNu& v, uint32_t* dst) {
tail ? _mm256_maskstore_epi32((int*)dst, mask(tail), v.fVec)
: 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(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) {} // TODO
STAGE(gather_i8) {} // TODO
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