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* 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 SkSwizzlePriv_DEFINED
#define SkSwizzlePriv_DEFINED
#include "include/private/SkColorData.h"
#include "src/base/SkVx.h"
#include <cstdint>
namespace SkOpts {
// Swizzle input into some sort of 8888 pixel, {premul,unpremul} x {rgba,bgra}.
using Swizzle_8888_u32 = void (*)(uint32_t*, const uint32_t*, int);
extern Swizzle_8888_u32 RGBA_to_BGRA, // i.e. just swap RB
RGBA_to_rgbA, // i.e. just premultiply
RGBA_to_bgrA, // i.e. swap RB and premultiply
rgbA_to_RGBA, // i.e. just unpremultiply
rgbA_to_BGRA, // i.e. swap RB and unpremultiply
inverted_CMYK_to_RGB1, // i.e. convert color space
inverted_CMYK_to_BGR1; // i.e. convert color space
using Swizzle_8888_u8 = void (*)(uint32_t*, const uint8_t*, int);
extern Swizzle_8888_u8 RGB_to_RGB1, // i.e. insert an opaque alpha
RGB_to_BGR1, // i.e. swap RB and insert an opaque alpha
gray_to_RGB1, // i.e. expand to color channels + an opaque alpha
grayA_to_RGBA, // i.e. expand to color channels
grayA_to_rgbA; // i.e. expand to color channels and premultiply
void Init_Swizzler();
} // namespace SkOpts
static inline skvx::float4 swizzle_rb(const skvx::float4& x) {
return skvx::shuffle<2, 1, 0, 3>(x);
static inline skvx::float4 swizzle_rb_if_bgra(const skvx::float4& x) {
#if defined(SK_PMCOLOR_IS_BGRA)
return swizzle_rb(x);
return x;
static inline skvx::float4 Sk4f_fromL32(uint32_t px) {
return skvx::cast<float>(skvx::byte4::Load(&px)) * (1 / 255.0f);
static inline uint32_t Sk4f_toL32(const skvx::float4& px) {
uint32_t l32;
// For the expected positive color values, the +0.5 before the pin and cast effectively rounds
// to the nearest int without having to call round() or lrint().
skvx::cast<uint8_t>(skvx::pin(px * 255.f + 0.5f, skvx::float4(0.f), skvx::float4(255.f)))
return l32;
#endif // SkSwizzlePriv_DEFINED