1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #ifndef SkSwizzlePriv_DEFINED
9 #define SkSwizzlePriv_DEFINED
10
11 #include "include/private/SkColorData.h"
12 #include "src/base/SkVx.h"
13
14 #include <cstdint>
15
16 namespace SkOpts {
17 // Swizzle input into some sort of 8888 pixel, {premul,unpremul} x {rgba,bgra}.
18 using Swizzle_8888_u32 = void (*)(uint32_t*, const uint32_t*, int);
19 extern Swizzle_8888_u32 RGBA_to_BGRA, // i.e. just swap RB
20 RGBA_to_rgbA, // i.e. just premultiply
21 RGBA_to_bgrA, // i.e. swap RB and premultiply
22 rgbA_to_RGBA, // i.e. just unpremultiply
23 rgbA_to_BGRA, // i.e. swap RB and unpremultiply
24 inverted_CMYK_to_RGB1, // i.e. convert color space
25 inverted_CMYK_to_BGR1; // i.e. convert color space
26
27 using Swizzle_8888_u8 = void (*)(uint32_t*, const uint8_t*, int);
28 extern Swizzle_8888_u8 RGB_to_RGB1, // i.e. insert an opaque alpha
29 RGB_to_BGR1, // i.e. swap RB and insert an opaque alpha
30 gray_to_RGB1, // i.e. expand to color channels + an opaque alpha
31 grayA_to_RGBA, // i.e. expand to color channels
32 grayA_to_rgbA; // i.e. expand to color channels and premultiply
33
34 void Init_Swizzler();
35 } // namespace SkOpts
36
swizzle_rb(const skvx::float4 & x)37 static inline skvx::float4 swizzle_rb(const skvx::float4& x) {
38 return skvx::shuffle<2, 1, 0, 3>(x);
39 }
40
swizzle_rb_if_bgra(const skvx::float4 & x)41 static inline skvx::float4 swizzle_rb_if_bgra(const skvx::float4& x) {
42 #if defined(SK_PMCOLOR_IS_BGRA)
43 return swizzle_rb(x);
44 #else
45 return x;
46 #endif
47 }
48
Sk4f_fromL32(uint32_t px)49 static inline skvx::float4 Sk4f_fromL32(uint32_t px) {
50 return skvx::cast<float>(skvx::byte4::Load(&px)) * (1 / 255.0f);
51 }
52
Sk4f_toL32(const skvx::float4 & px)53 static inline uint32_t Sk4f_toL32(const skvx::float4& px) {
54 uint32_t l32;
55 // For the expected positive color values, the +0.5 before the pin and cast effectively rounds
56 // to the nearest int without having to call round() or lrint().
57 skvx::cast<uint8_t>(skvx::pin(px * 255.f + 0.5f, skvx::float4(0.f), skvx::float4(255.f)))
58 .store(&l32);
59 return l32;
60 }
61 #endif // SkSwizzlePriv_DEFINED
62