OLD | NEW |
| (Empty) |
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 SkColorSpaceXform_DEFINED | |
9 #define SkColorSpaceXform_DEFINED | |
10 | |
11 #include "SkColorSpace.h" | |
12 #include "SkColorSpace_Base.h" | |
13 #include "SkImageInfo.h" | |
14 | |
15 class SkColorSpaceXform : SkNoncopyable { | |
16 public: | |
17 | |
18 /** | |
19 * Create an object to handle color space conversions. | |
20 * | |
21 * @param srcSpace The encoded color space. | |
22 * @param dstSpace The destination color space. | |
23 * | |
24 */ | |
25 static std::unique_ptr<SkColorSpaceXform> New(SkColorSpace* srcSpace, SkColo
rSpace* dstSpace); | |
26 | |
27 enum ColorFormat : uint8_t { | |
28 kRGBA_8888_ColorFormat, | |
29 kBGRA_8888_ColorFormat, | |
30 kRGBA_F16_ColorFormat, | |
31 kRGBA_F32_ColorFormat, | |
32 }; | |
33 | |
34 /** | |
35 * Apply the color conversion to a |src| buffer, storing the output in the
|dst| buffer. | |
36 * | |
37 * @param dst Stored in the format described by |dstColorFormat| | |
38 * @param src Stored in the format described by |srcColorFormat| | |
39 * @param len Number of pixels in the buffers | |
40 * @param dstColorFormat Describes color format of |dst| | |
41 * @param srcColorFormat Describes color format of |src| | |
42 * Must be kRGBA_8888 or kBGRA_8888 | |
43 * @param alphaType Describes alpha properties of the |dst| (and |src|
) | |
44 * kUnpremul preserves input alpha values | |
45 * kPremul performs a premultiplication and also pr
eserves alpha values | |
46 * kOpaque optimization hint, |dst| alphas set to 1 | |
47 * | |
48 */ | |
49 virtual void apply(void* dst, const uint32_t* src, int len, ColorFormat dstC
olorFormat, | |
50 ColorFormat srcColorFormat, SkAlphaType alphaType) const
= 0; | |
51 | |
52 virtual ~SkColorSpaceXform() {} | |
53 }; | |
54 | |
55 enum SrcGamma { | |
56 kLinear_SrcGamma, | |
57 kTable_SrcGamma, | |
58 }; | |
59 | |
60 enum DstGamma { | |
61 kLinear_DstGamma, | |
62 kSRGB_DstGamma, | |
63 k2Dot2_DstGamma, | |
64 kTable_DstGamma, | |
65 }; | |
66 | |
67 enum ColorSpaceMatch { | |
68 kNone_ColorSpaceMatch, | |
69 kGamut_ColorSpaceMatch, | |
70 kFull_ColorSpaceMatch, | |
71 }; | |
72 | |
73 template <SrcGamma kSrc, DstGamma kDst, ColorSpaceMatch kCSM> | |
74 class SkColorSpaceXform_Base : public SkColorSpaceXform { | |
75 public: | |
76 | |
77 void apply(void* dst, const uint32_t* src, int len, ColorFormat dstColorForm
at, | |
78 ColorFormat srcColorFormat, SkAlphaType alphaType) const override
; | |
79 | |
80 static constexpr int kDstGammaTableSize = 1024; | |
81 | |
82 private: | |
83 SkColorSpaceXform_Base(SkColorSpace* srcSpace, const SkMatrix44& srcToDst, | |
84 SkColorSpace* dstSpace); | |
85 | |
86 sk_sp<SkColorLookUpTable> fColorLUT; | |
87 | |
88 // Contain pointers into storage or pointers into precomputed tables. | |
89 const float* fSrcGammaTables[3]; | |
90 const uint8_t* fDstGammaTables[3]; | |
91 SkAutoMalloc fStorage; | |
92 | |
93 float fSrcToDst[16]; | |
94 | |
95 friend class SkColorSpaceXform; | |
96 friend std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(SkColorSpace* sp
ace); | |
97 }; | |
98 | |
99 // For testing. Bypasses opts for when src and dst color spaces are equal. | |
100 std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(SkColorSpace* space); | |
101 | |
102 #endif | |
OLD | NEW |