msarett | bb9f774 | 2016-05-17 09:31:20 -0700 | [diff] [blame] | 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 | |
msarett | 8cc2091 | 2016-05-23 09:29:29 -0700 | [diff] [blame] | 8 | #ifndef SkColorSpace_Base_DEFINED |
| 9 | #define SkColorSpace_Base_DEFINED |
| 10 | |
| 11 | #include "SkColorSpace.h" |
msarett | ab926f0 | 2016-05-25 08:53:40 -0700 | [diff] [blame] | 12 | #include "SkData.h" |
msarett | e077e06 | 2016-05-24 10:16:53 -0700 | [diff] [blame] | 13 | #include "SkTemplates.h" |
msarett | bb9f774 | 2016-05-17 09:31:20 -0700 | [diff] [blame] | 14 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 15 | struct SkGammas : SkRefCnt { |
msarett | 2aec3ff | 2016-07-20 12:58:52 -0700 | [diff] [blame] | 16 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 17 | // There are four possible representations for gamma curves. kNone_Type is used |
| 18 | // as a placeholder until the struct is initialized. It is not a valid value. |
| 19 | enum class Type : uint8_t { |
| 20 | kNone_Type, |
| 21 | kNamed_Type, |
| 22 | kValue_Type, |
| 23 | kTable_Type, |
| 24 | kParam_Type, |
| 25 | }; |
msarett | 2aec3ff | 2016-07-20 12:58:52 -0700 | [diff] [blame] | 26 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 27 | // Contains information for a gamma table. |
| 28 | struct Table { |
| 29 | size_t fOffset; |
| 30 | int fSize; |
msarett | 959ccc1 | 2016-07-20 15:10:02 -0700 | [diff] [blame] | 31 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 32 | const float* table(const SkGammas* base) const { |
| 33 | return SkTAddOffset<const float>(base, sizeof(SkGammas) + fOffset); |
| 34 | } |
| 35 | }; |
msarett | 959ccc1 | 2016-07-20 15:10:02 -0700 | [diff] [blame] | 36 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 37 | // Contains the parameters for a parametric curve. |
| 38 | struct Params { |
| 39 | // Y = (aX + b)^g + c for X >= d |
| 40 | // Y = eX + f otherwise |
| 41 | float fG; |
| 42 | float fA; |
| 43 | float fB; |
| 44 | float fC; |
| 45 | float fD; |
| 46 | float fE; |
| 47 | float fF; |
| 48 | }; |
msarett | 959ccc1 | 2016-07-20 15:10:02 -0700 | [diff] [blame] | 49 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 50 | // Contains the actual gamma curve information. Should be interpreted |
| 51 | // based on the type of the gamma curve. |
| 52 | union Data { |
| 53 | Data() |
| 54 | : fTable{ 0, 0 } |
| 55 | {} |
msarett | 959ccc1 | 2016-07-20 15:10:02 -0700 | [diff] [blame] | 56 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 57 | inline bool operator==(const Data& that) const { |
| 58 | return this->fTable.fOffset == that.fTable.fOffset && |
| 59 | this->fTable.fSize == that.fTable.fSize; |
msarett | 456bf30 | 2016-07-20 16:14:16 -0700 | [diff] [blame] | 60 | } |
| 61 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 62 | SkColorSpace::GammaNamed fNamed; |
| 63 | float fValue; |
| 64 | Table fTable; |
| 65 | size_t fParamOffset; |
| 66 | |
| 67 | const Params& params(const SkGammas* base) const { |
| 68 | return *SkTAddOffset<const Params>(base, sizeof(SkGammas) + fParamOffset); |
msarett | 456bf30 | 2016-07-20 16:14:16 -0700 | [diff] [blame] | 69 | } |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 70 | }; |
msarett | 456bf30 | 2016-07-20 16:14:16 -0700 | [diff] [blame] | 71 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 72 | bool isNamed(int i) const { |
msarett | a714bc3 | 2016-07-29 08:58:33 -0700 | [diff] [blame] | 73 | return Type::kNamed_Type == this->type(i); |
msarett | 456bf30 | 2016-07-20 16:14:16 -0700 | [diff] [blame] | 74 | } |
| 75 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 76 | bool isValue(int i) const { |
msarett | a714bc3 | 2016-07-29 08:58:33 -0700 | [diff] [blame] | 77 | return Type::kValue_Type == this->type(i); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 78 | } |
msarett | 456bf30 | 2016-07-20 16:14:16 -0700 | [diff] [blame] | 79 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 80 | bool isTable(int i) const { |
msarett | a714bc3 | 2016-07-29 08:58:33 -0700 | [diff] [blame] | 81 | return Type::kTable_Type == this->type(i); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | bool isParametric(int i) const { |
msarett | a714bc3 | 2016-07-29 08:58:33 -0700 | [diff] [blame] | 85 | return Type::kParam_Type == this->type(i); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | const Data& data(int i) const { |
msarett | a714bc3 | 2016-07-29 08:58:33 -0700 | [diff] [blame] | 89 | switch (i) { |
| 90 | case 0: |
| 91 | return fRedData; |
| 92 | case 1: |
| 93 | return fGreenData; |
| 94 | case 2: |
| 95 | return fBlueData; |
| 96 | default: |
| 97 | SkASSERT(false); |
| 98 | return fRedData; |
| 99 | } |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | const float* table(int i) const { |
| 103 | SkASSERT(isTable(i)); |
msarett | a714bc3 | 2016-07-29 08:58:33 -0700 | [diff] [blame] | 104 | return this->data(i).fTable.table(this); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | const Params& params(int i) const { |
| 108 | SkASSERT(isParametric(i)); |
msarett | a714bc3 | 2016-07-29 08:58:33 -0700 | [diff] [blame] | 109 | return this->data(i).params(this); |
| 110 | } |
| 111 | |
| 112 | Type type(int i) const { |
| 113 | switch (i) { |
| 114 | case 0: |
| 115 | return fRedType; |
| 116 | case 1: |
| 117 | return fGreenType; |
| 118 | case 2: |
| 119 | return fBlueType; |
| 120 | default: |
| 121 | SkASSERT(false); |
| 122 | return fRedType; |
| 123 | } |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | SkGammas() |
| 127 | : fRedType(Type::kNone_Type) |
| 128 | , fGreenType(Type::kNone_Type) |
| 129 | , fBlueType(Type::kNone_Type) |
msarett | 456bf30 | 2016-07-20 16:14:16 -0700 | [diff] [blame] | 130 | {} |
| 131 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 132 | // These fields should only be modified when initializing the struct. |
| 133 | Data fRedData; |
| 134 | Data fGreenData; |
| 135 | Data fBlueData; |
| 136 | Type fRedType; |
| 137 | Type fGreenType; |
| 138 | Type fBlueType; |
msarett | 456bf30 | 2016-07-20 16:14:16 -0700 | [diff] [blame] | 139 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 140 | // Objects of this type are sometimes created in a custom fashion using |
| 141 | // sk_malloc_throw and therefore must be sk_freed. We overload new to |
| 142 | // also call sk_malloc_throw so that memory can be unconditionally released |
| 143 | // using sk_free in an overloaded delete. Overloading regular new means we |
| 144 | // must also overload placement new. |
| 145 | void* operator new(size_t size) { return sk_malloc_throw(size); } |
| 146 | void* operator new(size_t, void* p) { return p; } |
| 147 | void operator delete(void* p) { sk_free(p); } |
msarett | bb9f774 | 2016-05-17 09:31:20 -0700 | [diff] [blame] | 148 | }; |
| 149 | |
msarett | 0f83e01 | 2016-06-23 15:12:52 -0700 | [diff] [blame] | 150 | struct SkColorLookUpTable : public SkRefCnt { |
msarett | 959d45b | 2016-07-21 13:19:03 -0700 | [diff] [blame] | 151 | static constexpr uint8_t kOutputChannels = 3; |
msarett | bb9f774 | 2016-05-17 09:31:20 -0700 | [diff] [blame] | 152 | |
msarett | 959d45b | 2016-07-21 13:19:03 -0700 | [diff] [blame] | 153 | uint8_t fInputChannels; |
| 154 | uint8_t fGridPoints[3]; |
| 155 | |
| 156 | const float* table() const { |
| 157 | return SkTAddOffset<const float>(this, sizeof(SkColorLookUpTable)); |
msarett | bb9f774 | 2016-05-17 09:31:20 -0700 | [diff] [blame] | 158 | } |
msarett | 959d45b | 2016-07-21 13:19:03 -0700 | [diff] [blame] | 159 | |
| 160 | SkColorLookUpTable(uint8_t inputChannels, uint8_t gridPoints[3]) |
| 161 | : fInputChannels(inputChannels) |
| 162 | { |
| 163 | SkASSERT(3 == inputChannels); |
| 164 | memcpy(fGridPoints, gridPoints, 3 * sizeof(uint8_t)); |
| 165 | } |
| 166 | |
| 167 | // Objects of this type are created in a custom fashion using sk_malloc_throw |
| 168 | // and therefore must be sk_freed. |
| 169 | void* operator new(size_t size) = delete; |
| 170 | void* operator new(size_t, void* p) { return p; } |
| 171 | void operator delete(void* p) { sk_free(p); } |
msarett | bb9f774 | 2016-05-17 09:31:20 -0700 | [diff] [blame] | 172 | }; |
| 173 | |
msarett | 8cc2091 | 2016-05-23 09:29:29 -0700 | [diff] [blame] | 174 | class SkColorSpace_Base : public SkColorSpace { |
| 175 | public: |
| 176 | |
msarett | d9015a4 | 2016-08-22 12:29:31 -0700 | [diff] [blame^] | 177 | static sk_sp<SkColorSpace> NewRGB(const float gammas[3], const SkMatrix44& toXYZD50); |
msarett | c4ce6b5 | 2016-06-16 07:37:41 -0700 | [diff] [blame] | 178 | |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 179 | const SkGammas* gammas() const { return fGammas.get(); } |
msarett | 8cc2091 | 2016-05-23 09:29:29 -0700 | [diff] [blame] | 180 | |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 181 | const SkColorLookUpTable* colorLUT() const { return fColorLUT.get(); } |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 182 | |
msarett | c213f0d | 2016-08-01 14:23:32 -0700 | [diff] [blame] | 183 | private: |
| 184 | |
msarett | ab926f0 | 2016-05-25 08:53:40 -0700 | [diff] [blame] | 185 | /** |
msarett | c213f0d | 2016-08-01 14:23:32 -0700 | [diff] [blame] | 186 | * FIXME (msarett): |
| 187 | * Hiding this function until we can determine if we need it. Known issues include: |
| 188 | * Only writes 3x3 matrices |
| 189 | * Only writes float gammas |
| 190 | * Rejected by some parsers because the "profile description" is empty |
msarett | ab926f0 | 2016-05-25 08:53:40 -0700 | [diff] [blame] | 191 | */ |
| 192 | sk_sp<SkData> writeToICC() const; |
| 193 | |
msarett | 111a42d | 2016-06-22 08:18:54 -0700 | [diff] [blame] | 194 | static sk_sp<SkColorSpace> NewRGB(GammaNamed gammaNamed, const SkMatrix44& toXYZD50); |
msarett | ab926f0 | 2016-05-25 08:53:40 -0700 | [diff] [blame] | 195 | |
msarett | 111a42d | 2016-06-22 08:18:54 -0700 | [diff] [blame] | 196 | SkColorSpace_Base(GammaNamed gammaNamed, const SkMatrix44& toXYZ, Named named); |
msarett | 8cc2091 | 2016-05-23 09:29:29 -0700 | [diff] [blame] | 197 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 198 | SkColorSpace_Base(sk_sp<SkColorLookUpTable> colorLUT, GammaNamed gammaNamed, |
| 199 | sk_sp<SkGammas> gammas, const SkMatrix44& toXYZ, sk_sp<SkData> profileData); |
msarett | 8cc2091 | 2016-05-23 09:29:29 -0700 | [diff] [blame] | 200 | |
msarett | 0f83e01 | 2016-06-23 15:12:52 -0700 | [diff] [blame] | 201 | sk_sp<SkColorLookUpTable> fColorLUT; |
| 202 | sk_sp<SkGammas> fGammas; |
| 203 | sk_sp<SkData> fProfileData; |
msarett | 8cc2091 | 2016-05-23 09:29:29 -0700 | [diff] [blame] | 204 | |
| 205 | friend class SkColorSpace; |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 206 | friend class ColorSpaceXformTest; |
msarett | c213f0d | 2016-08-01 14:23:32 -0700 | [diff] [blame] | 207 | friend class ColorSpaceTest; |
msarett | 8cc2091 | 2016-05-23 09:29:29 -0700 | [diff] [blame] | 208 | typedef SkColorSpace INHERITED; |
| 209 | }; |
| 210 | |
| 211 | static inline SkColorSpace_Base* as_CSB(SkColorSpace* colorSpace) { |
| 212 | return static_cast<SkColorSpace_Base*>(colorSpace); |
| 213 | } |
| 214 | |
msarett | ab926f0 | 2016-05-25 08:53:40 -0700 | [diff] [blame] | 215 | static inline const SkColorSpace_Base* as_CSB(const SkColorSpace* colorSpace) { |
| 216 | return static_cast<const SkColorSpace_Base*>(colorSpace); |
| 217 | } |
| 218 | |
msarett | 888dc16 | 2016-05-23 10:21:17 -0700 | [diff] [blame] | 219 | static inline SkColorSpace_Base* as_CSB(const sk_sp<SkColorSpace>& colorSpace) { |
| 220 | return static_cast<SkColorSpace_Base*>(colorSpace.get()); |
| 221 | } |
| 222 | |
msarett | bb9f774 | 2016-05-17 09:31:20 -0700 | [diff] [blame] | 223 | #endif |