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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SKIA_EXT_SKCOLORSPACE_PRIMARIES_H_
#define SKIA_EXT_SKCOLORSPACE_PRIMARIES_H_
#include "third_party/skia/include/core/SkColorSpace.h"
#include <string>
// TODO(https://crbug.com/skia/13721): Add these operators to Skia source.
SK_API bool operator==(const SkColorSpacePrimaries& a,
const SkColorSpacePrimaries& b);
SK_API bool operator!=(const SkColorSpacePrimaries& a,
const SkColorSpacePrimaries& b);
namespace skia {
// Display SkColorSpacePrimaries as a string.
SK_API std::string SkColorSpacePrimariesToString(
const SkColorSpacePrimaries& primaries);
// Given a matrix that transforms to XYZD50, compute the primaries with a D65
// white point that would produce this matrix.
SK_API SkColorSpacePrimaries
GetD65PrimariesFromToXYZD50Matrix(const skcms_Matrix3x3& m);
} // namespace skia
namespace SkNamedPrimariesExt {
////////////////////////////////////////////////////////////////////////////////
// CSS Color Level 4 predefined and xyz color spaces.
// 'srgb'
static constexpr SkColorSpacePrimaries kSRGB = SkNamedPrimaries::kRec709;
// 'display-p3' (and also 'p3' as a color gamut).
static constexpr SkColorSpacePrimaries kP3 = SkNamedPrimaries::kSMPTE_EG_432_1;
// 'a98-rgb'
static constexpr SkColorSpacePrimaries kA98RGB = {
0.64f, 0.33f, 0.21f, 0.71f, 0.15f, 0.06f, 0.3127f, 0.3290f};
// 'rec2020' (as both a predefined color space and color gamut).
// The value kRec2020 is already defined above.
// 'xyzd50'
static constexpr SkColorSpacePrimaries kXYZD50 = {
1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.34567f, 0.35850f};
// 'xyz' and 'xyzd65'
static constexpr SkColorSpacePrimaries kXYZD65 = {1.0f, 0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 0.3127f, 0.3290f};
////////////////////////////////////////////////////////////////////////////////
// Additional helper color primaries.
// Invalid primaries, initialized to zero.
static constexpr SkColorSpacePrimaries kInvalid = {0};
// The GenericRGB space on macOS.
static constexpr SkColorSpacePrimaries kAppleGenericRGB = {
0.63002f, 0.34000f, 0.29505f, 0.60498f,
0.15501f, 0.07701f, 0.3127f, 0.3290f};
// Primaries where the colors are rotated and the gamut is huge. Good for
// testing.
static constexpr SkColorSpacePrimaries kWideGamutColorSpin = {
0.01f, 0.98f, 0.01f, 0.01f, 0.98f, 0.01f, 0.3127f, 0.3290f};
} // namespace SkNamedPrimariesExt
#endif // SKIA_EXT_SKCOLORSPACE_PRIMARIES_H_
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