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1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkColorSpaceXform_DEFINED | 8 #ifndef SkColorSpaceXform_DEFINED |
9 #define SkColorSpaceXform_DEFINED | 9 #define SkColorSpaceXform_DEFINED |
10 | 10 |
11 #include "SkColorSpace.h" | 11 #include "SkColorSpace.h" |
12 #include "SkColorSpace_Base.h" | 12 #include "SkColorSpace_Base.h" |
13 #include "SkImageInfo.h" | 13 #include "SkImageInfo.h" |
14 | 14 |
15 class SkColorSpaceXform : SkNoncopyable { | 15 class SkColorSpaceXform : SkNoncopyable { |
16 public: | 16 public: |
17 | 17 |
18 /** | 18 /** |
19 * Create an object to handle color space conversions. | 19 * Create an object to handle color space conversions. |
20 * | 20 * |
21 * @param srcSpace The encoded color space. | 21 * @param srcSpace The encoded color space. |
22 * @param dstSpace The destination color space. | 22 * @param dstSpace The destination color space. |
23 * | 23 * |
24 */ | 24 */ |
25 static std::unique_ptr<SkColorSpaceXform> New(const sk_sp<SkColorSpace>& src
Space, | 25 static std::unique_ptr<SkColorSpaceXform> New(const sk_sp<SkColorSpace>& src
Space, |
26 const sk_sp<SkColorSpace>& dst
Space); | 26 const sk_sp<SkColorSpace>& dst
Space); |
27 | 27 |
28 enum ColorFormat : uint8_t { | |
29 kRGBA_8888_ColorFormat, | |
30 kBGRA_8888_ColorFormat, | |
31 kRGBA_F16_ColorFormat, | |
32 kRGBA_F32_ColorFormat, | |
33 }; | |
34 | |
35 /** | 28 /** |
36 * Apply the color conversion to a |src| buffer, storing the output in the
|dst| buffer. | 29 * Apply the color conversion to a |src| buffer, storing the output in the
|dst| buffer. |
37 * | 30 * |
38 * @param dst Stored in the format described by |dstColorType| a
nd |dstAlphaType| | 31 * @param dst Stored in the format described by |dstColorType| and
|dstAlphaType| |
39 * @param src Stored as RGBA_8888, kUnpremul (note kOpaque is a
form of kUnpremul) | 32 * @param src Stored as RGBA_8888, kUnpremul (note kOpaque is a fo
rm of kUnpremul) |
40 * @param len Number of pixels in the buffers | 33 * @param len Number of pixels in the buffers |
41 * @param dstColorFormat Describes color format of |dst| | 34 * @param dstColorType Describes color type of |dst| |
42 * @param dstAlphaType Describes alpha type of |dst| | 35 * @param dstAlphaType Describes alpha type of |dst| |
43 * kUnpremul preserves input alpha values | 36 * kUnpremul preserves input alpha values |
44 * kPremul performs a premultiplication and also pr
eserves alpha values | 37 * kPremul performs a premultiplication and also pres
erves alpha values |
45 * kOpaque optimization hint, |dst| alphas set to 1 | 38 * kOpaque optimization hint, |dst| alphas set to 1 |
46 * | 39 * |
47 */ | 40 */ |
48 virtual void apply(void* dst, const uint32_t* src, int len, ColorFormat dstC
olorFormat, | 41 virtual void apply(void* dst, const uint32_t* src, int len, SkColorType dstC
olorType, |
49 SkAlphaType dstAlphaType) const = 0; | 42 SkAlphaType dstAlphaType) const = 0; |
50 | 43 |
51 virtual ~SkColorSpaceXform() {} | 44 virtual ~SkColorSpaceXform() {} |
52 }; | 45 }; |
53 | 46 |
54 enum SrcGamma { | 47 enum SrcGamma { |
55 kLinear_SrcGamma, | 48 kLinear_SrcGamma, |
56 kTable_SrcGamma, | 49 kTable_SrcGamma, |
57 }; | 50 }; |
58 | 51 |
59 enum DstGamma { | 52 enum DstGamma { |
60 kLinear_DstGamma, | 53 kLinear_DstGamma, |
61 kSRGB_DstGamma, | 54 kSRGB_DstGamma, |
62 k2Dot2_DstGamma, | 55 k2Dot2_DstGamma, |
63 kTable_DstGamma, | 56 kTable_DstGamma, |
64 }; | 57 }; |
65 | 58 |
66 enum ColorSpaceMatch { | 59 enum ColorSpaceMatch { |
67 kNone_ColorSpaceMatch, | 60 kNone_ColorSpaceMatch, |
68 kGamut_ColorSpaceMatch, | 61 kGamut_ColorSpaceMatch, |
69 kFull_ColorSpaceMatch, | 62 kFull_ColorSpaceMatch, |
70 }; | 63 }; |
71 | 64 |
72 template <SrcGamma kSrc, DstGamma kDst, ColorSpaceMatch kCSM> | 65 template <SrcGamma kSrc, DstGamma kDst, ColorSpaceMatch kCSM> |
73 class SkColorSpaceXform_Base : public SkColorSpaceXform { | 66 class SkColorSpaceXform_Base : public SkColorSpaceXform { |
74 public: | 67 public: |
75 | 68 |
76 void apply(void* dst, const uint32_t* src, int len, ColorFormat dstColorForm
at, | 69 void apply(void* dst, const uint32_t* src, int len, SkColorType dstColorType
, |
77 SkAlphaType dstAlphaType) const override; | 70 SkAlphaType dstAlphaType) const override; |
78 | 71 |
79 static constexpr int kDstGammaTableSize = 1024; | 72 static constexpr int kDstGammaTableSize = 1024; |
80 | 73 |
81 private: | 74 private: |
82 SkColorSpaceXform_Base(const sk_sp<SkColorSpace>& srcSpace, const SkMatrix44
& srcToDst, | 75 SkColorSpaceXform_Base(const sk_sp<SkColorSpace>& srcSpace, const SkMatrix44
& srcToDst, |
83 const sk_sp<SkColorSpace>& dstSpace); | 76 const sk_sp<SkColorSpace>& dstSpace); |
84 | 77 |
85 sk_sp<SkColorLookUpTable> fColorLUT; | 78 sk_sp<SkColorLookUpTable> fColorLUT; |
86 | 79 |
87 // Contain pointers into storage or pointers into precomputed tables. | 80 // Contain pointers into storage or pointers into precomputed tables. |
88 const float* fSrcGammaTables[3]; | 81 const float* fSrcGammaTables[3]; |
89 const uint8_t* fDstGammaTables[3]; | 82 const uint8_t* fDstGammaTables[3]; |
90 SkAutoMalloc fStorage; | 83 SkAutoMalloc fStorage; |
91 | 84 |
92 float fSrcToDst[16]; | 85 float fSrcToDst[16]; |
93 | 86 |
94 friend class SkColorSpaceXform; | 87 friend class SkColorSpaceXform; |
95 friend std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(const sk_sp<SkCo
lorSpace>& space); | 88 friend std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(const sk_sp<SkCo
lorSpace>& space); |
96 }; | 89 }; |
97 | 90 |
98 // For testing. Bypasses opts for when src and dst color spaces are equal. | 91 // For testing. Bypasses opts for when src and dst color spaces are equal. |
99 std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(const sk_sp<SkColorSpace>&
space); | 92 std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(const sk_sp<SkColorSpace>&
space); |
100 | 93 |
101 #endif | 94 #endif |
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