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| 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 SkColorSpace_DEFINED | |
| 9 #define SkColorSpace_DEFINED | |
| 10 | |
| 11 // Some terms | |
| 12 // | |
| 13 // PCS : Profile Connection Space : where color number values have an absolute
meaning. | |
| 14 // Part of the work float is to convert colors to and from this space... | |
| 15 // src_linear_unit_floats --> PCS --> PCS' --> dst_linear_unit_floats | |
| 16 // | |
| 17 // Some nice documents | |
| 18 // | |
| 19 // http://www.cambridgeincolour.com/tutorials/color-space-conversion.htm | |
| 20 // https://www.w3.org/Graphics/Color/srgb | |
| 21 // http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html | |
| 22 // | |
| 23 | |
| 24 #include "SkMatrix44.h" | |
| 25 #include "SkRefCnt.h" | |
| 26 #include "../private/SkTemplates.h" | |
| 27 | |
| 28 struct SkColorLookUpTable; | |
| 29 struct SkGammaCurve; | |
| 30 struct SkGammas; | |
| 31 | |
| 32 class SkColorSpace : public SkRefCnt { | |
| 33 public: | |
| 34 | |
| 35 enum Named { | |
| 36 kUnknown_Named, | |
| 37 kSRGB_Named, | |
| 38 kAdobeRGB_Named, | |
| 39 }; | |
| 40 | |
| 41 /** | |
| 42 * Given the src gamma and a transform from src gamut to D50_XYZ, return a
SkColorSpace. | |
| 43 */ | |
| 44 static sk_sp<SkColorSpace> NewRGB(float gammas[3], const SkMatrix44& toXYZD5
0); | |
| 45 | |
| 46 static sk_sp<SkColorSpace> NewNamed(Named); | |
| 47 static sk_sp<SkColorSpace> NewICC(const void*, size_t); | |
| 48 | |
| 49 /** | |
| 50 * Used only by test code. | |
| 51 */ | |
| 52 SkGammas* gammas() const { return fGammas.get(); } | |
| 53 | |
| 54 SkMatrix44 xyz() const { return fToXYZD50; } | |
| 55 Named named() const { return fNamed; } | |
| 56 uint32_t uniqueID() const { return fUniqueID; } | |
| 57 | |
| 58 private: | |
| 59 | |
| 60 static bool LoadGammas(SkGammaCurve* gammas, uint32_t num, const uint8_t* sr
c, size_t len); | |
| 61 | |
| 62 static bool LoadColorLUT(SkColorLookUpTable* colorLUT, uint32_t inputChannel
s, | |
| 63 uint32_t outputChannels, const uint8_t* src, size_t
len); | |
| 64 | |
| 65 static bool LoadA2B0(SkColorLookUpTable* colorLUT, SkGammaCurve*, SkMatrix44
* toXYZ, | |
| 66 const uint8_t* src, size_t len); | |
| 67 | |
| 68 SkColorSpace(sk_sp<SkGammas> gammas, const SkMatrix44& toXYZ, Named); | |
| 69 | |
| 70 SkColorSpace(SkColorLookUpTable* colorLUT, sk_sp<SkGammas> gammas, const SkM
atrix44& toXYZ); | |
| 71 | |
| 72 SkAutoTDelete<SkColorLookUpTable> fColorLUT; | |
| 73 sk_sp<SkGammas> fGammas; | |
| 74 const SkMatrix44 fToXYZD50; | |
| 75 | |
| 76 const uint32_t fUniqueID; | |
| 77 const Named fNamed; | |
| 78 }; | |
| 79 | |
| 80 #endif | |
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Chromium Code Reviews
Issue 1996973002:
Make SkColorSpace a public API (Closed)
Base URL: https://skia.googlesource.com/skia.git@master