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Skia
2D Graphics Library
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8 #ifndef SkColorSpace_DEFINED
9 #define SkColorSpace_DEFINED
12 #include "include/private/SkFixed.h"
13 #include "include/private/SkOnce.h"
14 #include "include/third_party/skcms/skcms.h"
36 bool toXYZD50(skcms_Matrix3x3* toXYZD50)
const;
42 static constexpr skcms_TransferFunction
kSRGB =
43 { 2.4f, (float)(1/1.055), (float)(0.055/1.055), (float)(1/12.92), 0.04045f, 0.0f, 0.0f };
45 static constexpr skcms_TransferFunction
k2Dot2 =
46 { 2.2f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
48 static constexpr skcms_TransferFunction
kLinear =
49 { 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
51 static constexpr skcms_TransferFunction
kRec2020 =
52 {2.22222f, 0.909672f, 0.0903276f, 0.222222f, 0.0812429f, 0, 0};
54 static constexpr skcms_TransferFunction
kPQ =
55 {-2.0f, -107/128.0f, 1.0f, 32/2523.0f, 2413/128.0f, -2392/128.0f, 8192/1305.0f };
57 static constexpr skcms_TransferFunction
kHLG =
58 {-3.0f, 2.0f, 2.0f, 1/0.17883277f, 0.28466892f, 0.55991073f, 0.0f };
64 static constexpr skcms_Matrix3x3
kSRGB = {{
69 { SkFixedToFloat(0x6FA2), SkFixedToFloat(0x6299), SkFixedToFloat(0x24A0) },
70 { SkFixedToFloat(0x38F5), SkFixedToFloat(0xB785), SkFixedToFloat(0x0F84) },
71 { SkFixedToFloat(0x0390), SkFixedToFloat(0x18DA), SkFixedToFloat(0xB6CF) },
79 { SkFixedToFloat(0x9c18), SkFixedToFloat(0x348d), SkFixedToFloat(0x2631) },
80 { SkFixedToFloat(0x4fa5), SkFixedToFloat(0xa02c), SkFixedToFloat(0x102f) },
81 { SkFixedToFloat(0x04fc), SkFixedToFloat(0x0f95), SkFixedToFloat(0xbe9c) },
85 { 0.515102f, 0.291965f, 0.157153f },
86 { 0.241182f, 0.692236f, 0.0665819f },
87 { -0.00104941f, 0.0418818f, 0.784378f },
91 { 0.673459f, 0.165661f, 0.125100f },
92 { 0.279033f, 0.675338f, 0.0456288f },
93 { -0.00193139f, 0.0299794f, 0.797162f },
96 static constexpr skcms_Matrix3x3
kXYZ = {{
120 const skcms_Matrix3x3& toXYZ);
225 uint64_t
hash()
const {
return (uint64_t)fTransferFnHash << 32 | fToXYZD50Hash; }
228 friend class SkColorSpaceSingletonFactory;
230 SkColorSpace(
const skcms_TransferFunction& transferFn,
const skcms_Matrix3x3& toXYZ);
232 void computeLazyDstFields()
const;
234 uint32_t fTransferFnHash;
235 uint32_t fToXYZD50Hash;
237 skcms_TransferFunction fTransferFn;
238 skcms_Matrix3x3 fToXYZD50;
240 mutable skcms_TransferFunction fInvTransferFn;
241 mutable skcms_Matrix3x3 fFromXYZD50;
242 mutable SkOnce fLazyDstFieldsOnce;
bool toXYZD50(skcms_Matrix3x3 *toXYZD50) const
Returns true and sets |toXYZD50| if the color gamut can be described as a matrix.
Definition: SkColorSpace.h:39
bool gammaCloseToSRGB() const
Returns true if the color space gamma is near enough to be approximated as sRGB.
void toProfile(skcms_ICCProfile *) const
Convert this color space to an skcms ICC profile struct.
void transferFn(skcms_TransferFunction *fn) const
Definition: SkColorSpace.h:62
bool gammaIsLinear() const
Returns true if the color space gamma is linear.
static sk_sp< SkColorSpace > MakeRGB(const skcms_TransferFunction &transferFn, const skcms_Matrix3x3 &toXYZ)
Create an SkColorSpace from a transfer function and a row-major 3x3 transformation to XYZ.
static constexpr skcms_Matrix3x3 kDisplayP3
Definition: SkColorSpace.h:84
sk_sp< SkData > serialize() const
Returns nullptr on failure.
float fBY
Definition: SkColorSpace.h:28
Definition: SkRefCnt.h:159
uint32_t transferFnHash() const
Definition: SkColorSpace.h:224
void invTransferFn(skcms_TransferFunction *fn) const
bool toXYZD50(skcms_Matrix3x3 *toXYZD50) const
Convert primaries and a white point to a toXYZD50 matrix, the preferred color gamut representation of...
static constexpr skcms_TransferFunction kSRGB
Definition: SkColorSpace.h:42
size_t writeToMemory(void *memory) const
If |memory| is nullptr, returns the size required to serialize.
sk_sp< SkColorSpace > makeSRGBGamma() const
Returns a color space with the same gamut as this one, with with the sRGB transfer function.
static constexpr skcms_TransferFunction kHLG
Definition: SkColorSpace.h:57
bool isNumericalTransferFn(skcms_TransferFunction *fn) const
Sets |fn| to the transfer function from this color space.
SkData holds an immutable data buffer.
Definition: SkData.h:22
static sk_sp< SkColorSpace > Make(const skcms_ICCProfile &)
Create an SkColorSpace from a parsed (skcms) ICC profile.
sk_sp< SkColorSpace > makeLinearGamma() const
Returns a color space with the same gamut as this one, but with a linear gamma.
static constexpr skcms_TransferFunction kLinear
Definition: SkColorSpace.h:48
static constexpr skcms_TransferFunction kPQ
Definition: SkColorSpace.h:54
#define SK_API
Definition: SkTypes.h:181
void transferFn(float gabcdef[7]) const
uint64_t hash() const
Definition: SkColorSpace.h:225
bool isSRGB() const
Returns true if the color space is sRGB.
static sk_sp< SkColorSpace > MakeSRGB()
Create the sRGB color space.
Describes a color gamut with primaries and a white point.
Definition: SkColorSpace.h:22
static constexpr skcms_Matrix3x3 kXYZ
Definition: SkColorSpace.h:96
float fGY
Definition: SkColorSpace.h:26
static constexpr skcms_Matrix3x3 kRec2020
Definition: SkColorSpace.h:90
static bool Equals(const SkColorSpace *, const SkColorSpace *)
If both are null, we return true.
void gamutTransformTo(const SkColorSpace *dst, skcms_Matrix3x3 *src_to_dst) const
static constexpr skcms_TransferFunction kRec2020
Definition: SkColorSpace.h:51
float fGX
Definition: SkColorSpace.h:25
sk_sp< SkColorSpace > makeColorSpin() const
Returns a color space with the same transfer function as this one, but with the primary colors rotate...
static sk_sp< SkColorSpace > MakeSRGBLinear()
Colorspace with the sRGB primaries, but a linear (1.0) gamma.
static constexpr skcms_Matrix3x3 kAdobeRGB
Definition: SkColorSpace.h:74
uint32_t toXYZD50Hash() const
Returns a hash of the gamut transformation to XYZ D50.
Definition: SkColorSpace.h:159
static sk_sp< SkColorSpace > Deserialize(const void *data, size_t length)
float fRY
Definition: SkColorSpace.h:24
float fWX
Definition: SkColorSpace.h:29
static constexpr skcms_TransferFunction k2Dot2
Definition: SkColorSpace.h:45
static constexpr skcms_Matrix3x3 kSRGB
Definition: SkColorSpace.h:64
float fRX
Definition: SkColorSpace.h:23
float fBX
Definition: SkColorSpace.h:27
float fWY
Definition: SkColorSpace.h:30
Definition: SkColorSpace.h:104