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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/jpeg-xl/lib/jxl/opsin_params.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/opsin_params.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/opsin_params.h b/third_party/jpeg-xl/lib/jxl/opsin_params.h new file mode 100644 index 0000000000..3a7da97d8a --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/opsin_params.h @@ -0,0 +1,86 @@ +// Copyright (c) the JPEG XL Project Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#ifndef LIB_JXL_OPSIN_PARAMS_H_ +#define LIB_JXL_OPSIN_PARAMS_H_ + +// Constants that define the XYB color space. + +#include <stdlib.h> + +#include <cmath> + +#include "lib/jxl/base/compiler_specific.h" + +namespace jxl { + +// Parameters for opsin absorbance. +static const float kM02 = 0.078f; +static const float kM00 = 0.30f; +static const float kM01 = 1.0f - kM02 - kM00; + +static const float kM12 = 0.078f; +static const float kM10 = 0.23f; +static const float kM11 = 1.0f - kM12 - kM10; + +static const float kM20 = 0.24342268924547819f; +static const float kM21 = 0.20476744424496821f; +static const float kM22 = 1.0f - kM20 - kM21; + +static const float kBScale = 1.0f; +static const float kYToBRatio = 1.0f; // works better with 0.50017729543783418 +static const float kBToYRatio = 1.0f / kYToBRatio; + +static const float kB0 = 0.0037930732552754493f; +static const float kB1 = kB0; +static const float kB2 = kB0; + +// Opsin absorbance matrix is now frozen. +static const float kOpsinAbsorbanceMatrix[9] = { + kM00, kM01, kM02, kM10, kM11, kM12, kM20, kM21, kM22, +}; + +// Must be the inverse matrix of kOpsinAbsorbanceMatrix and match the spec. +static inline const float* DefaultInverseOpsinAbsorbanceMatrix() { + static float kDefaultInverseOpsinAbsorbanceMatrix[9] = { + 11.031566901960783f, -9.866943921568629f, -0.16462299647058826f, + -3.254147380392157f, 4.418770392156863f, -0.16462299647058826f, + -3.6588512862745097f, 2.7129230470588235f, 1.9459282392156863f}; + return kDefaultInverseOpsinAbsorbanceMatrix; +} + +// Returns 3x3 row-major matrix inverse of kOpsinAbsorbanceMatrix. +// opsin_image_test verifies this is actually the inverse. +const float* GetOpsinAbsorbanceInverseMatrix(); + +void InitSIMDInverseMatrix(const float* JXL_RESTRICT inverse, + float* JXL_RESTRICT simd_inverse, + float intensity_target); + +static const float kOpsinAbsorbanceBias[3] = { + kB0, + kB1, + kB2, +}; + +static const float kNegOpsinAbsorbanceBiasRGB[4] = { + -kOpsinAbsorbanceBias[0], -kOpsinAbsorbanceBias[1], + -kOpsinAbsorbanceBias[2], 1.0f}; + +static const float kScaledXYBOffset[3] = { + 0.015386134f, + 0.0f, + 0.27770459f, +}; + +static const float kScaledXYBScale[3] = { + 22.995788804f, + 1.183000077f, + 1.502141333f, +}; + +} // namespace jxl + +#endif // LIB_JXL_OPSIN_PARAMS_H_ |