raftias | 9488833 | 2016-10-18 10:02:51 -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 | |
Ravi Mistry | 113d05f | 2016-12-17 01:31:03 +0000 | [diff] [blame] | 8 | #include "SkColorSpace_XYZ.h" |
| 9 | #include "SkColorSpacePriv.h" |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 10 | #include "SkColorSpaceXform_Base.h" |
Matt Sarett | e151bdb | 2017-01-04 11:05:05 -0500 | [diff] [blame] | 11 | #include "SkOpts.h" |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 12 | |
Matt Sarett | f388093 | 2017-03-24 10:06:03 -0400 | [diff] [blame] | 13 | SkColorSpace_XYZ::SkColorSpace_XYZ(SkGammaNamed gammaNamed, const SkMatrix44& toXYZD50) |
| 14 | : INHERITED(nullptr) |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 15 | , fGammaNamed(gammaNamed) |
| 16 | , fGammas(nullptr) |
| 17 | , fToXYZD50(toXYZD50) |
Matt Sarett | e151bdb | 2017-01-04 11:05:05 -0500 | [diff] [blame] | 18 | , fToXYZD50Hash(SkOpts::hash_fn(toXYZD50.values(), 16 * sizeof(SkMScalar), 0)) |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 19 | , fFromXYZD50(SkMatrix44::kUninitialized_Constructor) |
| 20 | {} |
| 21 | |
| 22 | SkColorSpace_XYZ::SkColorSpace_XYZ(SkGammaNamed gammaNamed, sk_sp<SkGammas> gammas, |
Matt Sarett | f388093 | 2017-03-24 10:06:03 -0400 | [diff] [blame] | 23 | const SkMatrix44& toXYZD50, sk_sp<SkData> profileData) |
| 24 | : INHERITED(std::move(profileData)) |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 25 | , fGammaNamed(gammaNamed) |
| 26 | , fGammas(std::move(gammas)) |
| 27 | , fToXYZD50(toXYZD50) |
Matt Sarett | e151bdb | 2017-01-04 11:05:05 -0500 | [diff] [blame] | 28 | , fToXYZD50Hash(SkOpts::hash_fn(toXYZD50.values(), 16 * sizeof(SkMScalar), 0)) |
raftias | 5476128 | 2016-12-01 13:44:07 -0500 | [diff] [blame] | 29 | , fFromXYZD50(SkMatrix44::kUninitialized_Constructor) { |
| 30 | SkASSERT(!fGammas || 3 == fGammas->channels()); |
raftias | 197e311 | 2016-12-01 15:31:29 -0500 | [diff] [blame] | 31 | if (fGammas) { |
| 32 | for (int i = 0; i < fGammas->channels(); ++i) { |
| 33 | if (SkGammas::Type::kTable_Type == fGammas->type(i)) { |
| 34 | SkASSERT(fGammas->data(i).fTable.fSize >= 2); |
| 35 | } |
| 36 | } |
| 37 | } |
raftias | 5476128 | 2016-12-01 13:44:07 -0500 | [diff] [blame] | 38 | } |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 39 | |
| 40 | const SkMatrix44* SkColorSpace_XYZ::fromXYZD50() const { |
| 41 | fFromXYZOnce([this] { |
| 42 | if (!fToXYZD50.invert(&fFromXYZD50)) { |
| 43 | // If a client gives us a dst gamut with a transform that we can't invert, we will |
| 44 | // simply give them back a transform to sRGB gamut. |
| 45 | SkDEBUGFAIL("Non-invertible XYZ matrix, defaulting to sRGB"); |
| 46 | SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor); |
| 47 | srgbToxyzD50.set3x3RowMajorf(gSRGB_toXYZD50); |
| 48 | srgbToxyzD50.invert(&fFromXYZD50); |
| 49 | } |
| 50 | }); |
| 51 | return &fFromXYZD50; |
| 52 | } |
| 53 | |
| 54 | bool SkColorSpace_XYZ::onGammaCloseToSRGB() const { |
| 55 | return kSRGB_SkGammaNamed == fGammaNamed || k2Dot2Curve_SkGammaNamed == fGammaNamed; |
| 56 | } |
| 57 | |
| 58 | bool SkColorSpace_XYZ::onGammaIsLinear() const { |
| 59 | return kLinear_SkGammaNamed == fGammaNamed; |
| 60 | } |
| 61 | |
Ravi Mistry | 113d05f | 2016-12-17 01:31:03 +0000 | [diff] [blame] | 62 | bool SkColorSpace_XYZ::onIsNumericalTransferFn(SkColorSpaceTransferFn* coeffs) const { |
| 63 | if (named_to_parametric(coeffs, fGammaNamed)) { |
| 64 | return true; |
| 65 | } |
| 66 | |
| 67 | SkASSERT(fGammas); |
| 68 | if (fGammas->data(0) != fGammas->data(1) || fGammas->data(0) != fGammas->data(2)) { |
| 69 | return false; |
| 70 | } |
| 71 | |
| 72 | if (fGammas->isValue(0)) { |
| 73 | value_to_parametric(coeffs, fGammas->data(0).fValue); |
| 74 | return true; |
| 75 | } |
| 76 | |
| 77 | if (fGammas->isParametric(0)) { |
| 78 | *coeffs = fGammas->params(0); |
| 79 | return true; |
| 80 | } |
| 81 | |
| 82 | return false; |
| 83 | } |
| 84 | |
Mike Klein | b1e6cfd | 2017-06-12 15:20:33 -0400 | [diff] [blame] | 85 | sk_sp<SkColorSpace> SkColorSpace_XYZ::makeLinearGamma() const { |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 86 | if (this->gammaIsLinear()) { |
Mike Klein | b1e6cfd | 2017-06-12 15:20:33 -0400 | [diff] [blame] | 87 | return sk_ref_sp(const_cast<SkColorSpace_XYZ*>(this)); |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 88 | } |
Matt Sarett | f388093 | 2017-03-24 10:06:03 -0400 | [diff] [blame] | 89 | return SkColorSpace_Base::MakeRGB(kLinear_SkGammaNamed, fToXYZD50); |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Mike Klein | b1e6cfd | 2017-06-12 15:20:33 -0400 | [diff] [blame] | 92 | sk_sp<SkColorSpace> SkColorSpace_XYZ::makeSRGBGamma() const { |
Brian Osman | 12313f0 | 2016-11-07 09:42:37 -0500 | [diff] [blame] | 93 | if (this->gammaCloseToSRGB()) { |
Mike Klein | b1e6cfd | 2017-06-12 15:20:33 -0400 | [diff] [blame] | 94 | return sk_ref_sp(const_cast<SkColorSpace_XYZ*>(this)); |
Brian Osman | 12313f0 | 2016-11-07 09:42:37 -0500 | [diff] [blame] | 95 | } |
Matt Sarett | f388093 | 2017-03-24 10:06:03 -0400 | [diff] [blame] | 96 | return SkColorSpace_Base::MakeRGB(kSRGB_SkGammaNamed, fToXYZD50); |
Brian Osman | 12313f0 | 2016-11-07 09:42:37 -0500 | [diff] [blame] | 97 | } |
| 98 | |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame] | 99 | void SkColorSpace_XYZ::toDstGammaTables(const uint8_t* tables[3], sk_sp<SkData>* storage, |
| 100 | int numTables) const { |
| 101 | fToDstGammaOnce([this, numTables] { |
| 102 | const bool gammasAreMatching = numTables <= 1; |
| 103 | fDstStorage = |
| 104 | SkData::MakeUninitialized(numTables * SkColorSpaceXform_Base::kDstGammaTableSize); |
| 105 | SkColorSpaceXform_Base::BuildDstGammaTables(fToDstGammaTables, |
| 106 | (uint8_t*) fDstStorage->writable_data(), this, |
| 107 | gammasAreMatching); |
| 108 | }); |
| 109 | |
| 110 | *storage = fDstStorage; |
| 111 | tables[0] = fToDstGammaTables[0]; |
| 112 | tables[1] = fToDstGammaTables[1]; |
| 113 | tables[2] = fToDstGammaTables[2]; |
| 114 | } |