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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 #include "SkMatrix44.h" |
| 12 #include "SkRefCnt.h" |
| 13 #include "../private/SkTemplates.h" |
| 14 |
| 15 class SkColorSpace : public SkRefCnt { |
| 16 public: |
| 17 |
| 18 /** |
| 19 * Common, named profiles that we can recognize. |
| 20 */ |
| 21 enum Named { |
| 22 kUnknown_Named, |
| 23 kSRGB_Named, |
| 24 kAdobeRGB_Named, |
| 25 }; |
| 26 |
| 27 /** |
| 28 * Create an SkColorSpace from the src gamma and a transform from src gamut
to D50 XYZ. |
| 29 */ |
| 30 static sk_sp<SkColorSpace> NewRGB(float gammas[3], const SkMatrix44& toXYZD5
0); |
| 31 |
| 32 /** |
| 33 * Create a common, named SkColorSpace. |
| 34 */ |
| 35 static sk_sp<SkColorSpace> NewNamed(Named); |
| 36 |
| 37 /** |
| 38 * Create an SkColorSpace from an ICC profile. |
| 39 */ |
| 40 static sk_sp<SkColorSpace> NewICC(const void*, size_t); |
| 41 |
| 42 enum GammaNamed { |
| 43 kLinear_GammaNamed, |
| 44 |
| 45 /** |
| 46 * Gamma curve is a close match to the 2.2f exponential curve. This is
by far |
| 47 * the most common gamma, and is used by sRGB and Adobe RGB profiles. |
| 48 */ |
| 49 k2Dot2Curve_GammaNamed, |
| 50 |
| 51 /** |
| 52 * Gamma is represented by a look-up table, a parametric curve, or an u
ncommon |
| 53 * exponential curve. Or there is an additional pre-processing step be
fore the |
| 54 * applying the gamma. |
| 55 */ |
| 56 kNonStandard_GammaNamed, |
| 57 }; |
| 58 |
| 59 GammaNamed gammaNamed() const { return fGammaNamed; } |
| 60 |
| 61 /** |
| 62 * Returns the matrix used to transform src gamut to XYZ D50. |
| 63 */ |
| 64 SkMatrix44 xyz() const { return fToXYZD50; } |
| 65 |
| 66 protected: |
| 67 |
| 68 SkColorSpace(GammaNamed gammaNamed, const SkMatrix44& toXYZD50, Named named)
; |
| 69 |
| 70 const GammaNamed fGammaNamed; |
| 71 const SkMatrix44 fToXYZD50; |
| 72 const Named fNamed; |
| 73 }; |
| 74 |
| 75 #endif |
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