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111 lines
3 KiB
C++
111 lines
3 KiB
C++
/*
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* Copyright (c) 2023, Nico Weber <thakis@chromium.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Endian.h>
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#include <LibGfx/ICC/DistinctFourCC.h>
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#include <LibGfx/ICC/Profile.h>
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#include <LibGfx/ICC/TagTypes.h>
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namespace Gfx::ICC {
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// ICC V4, 4.2 dateTimeNumber
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// "All the dateTimeNumber values in a profile shall be in Coordinated Universal Time [...]."
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struct DateTimeNumber {
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BigEndian<u16> year;
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BigEndian<u16> month;
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BigEndian<u16> day;
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BigEndian<u16> hours;
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BigEndian<u16> minutes;
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BigEndian<u16> seconds;
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};
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// ICC V4, 4.6 s15Fixed16Number
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using s15Fixed16Number = i32;
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// ICC V4, 4.7 u16Fixed16Number
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using u16Fixed16Number = u32;
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// ICC V4, 4.14 XYZNumber
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struct XYZNumber {
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BigEndian<s15Fixed16Number> x;
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BigEndian<s15Fixed16Number> y;
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BigEndian<s15Fixed16Number> z;
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operator XYZ() const
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{
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return XYZ { x / (double)0x1'0000, y / (double)0x1'0000, z / (double)0x1'0000 };
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}
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};
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// ICC V4, 7.2 Profile header
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struct ICCHeader {
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BigEndian<u32> profile_size;
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BigEndian<PreferredCMMType> preferred_cmm_type;
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u8 profile_version_major;
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u8 profile_version_minor_bugfix;
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BigEndian<u16> profile_version_zero;
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BigEndian<DeviceClass> profile_device_class;
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BigEndian<ColorSpace> data_color_space;
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BigEndian<ColorSpace> profile_connection_space; // "PCS" in the spec.
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DateTimeNumber profile_creation_time;
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BigEndian<u32> profile_file_signature;
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BigEndian<PrimaryPlatform> primary_platform;
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BigEndian<u32> profile_flags;
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BigEndian<DeviceManufacturer> device_manufacturer;
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BigEndian<DeviceModel> device_model;
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BigEndian<u64> device_attributes;
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BigEndian<u32> rendering_intent;
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XYZNumber pcs_illuminant;
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BigEndian<Creator> profile_creator;
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u8 profile_id[16];
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u8 reserved[28];
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};
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static_assert(AssertSize<ICCHeader, 128>());
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// Common bits of ICC v4, Table 40 — lut16Type encoding and Table 44 — lut8Type encoding
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struct LUTHeader {
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u8 number_of_input_channels;
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u8 number_of_output_channels;
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u8 number_of_clut_grid_points;
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u8 reserved_for_padding;
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BigEndian<s15Fixed16Number> e_parameters[9];
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};
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static_assert(AssertSize<LUTHeader, 40>());
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// Common bits of ICC v4, Table 45 — lutAToBType encoding and Table 47 — lutBToAType encoding
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struct AdvancedLUTHeader {
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u8 number_of_input_channels;
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u8 number_of_output_channels;
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BigEndian<u16> reserved_for_padding;
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BigEndian<u32> offset_to_b_curves;
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BigEndian<u32> offset_to_matrix;
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BigEndian<u32> offset_to_m_curves;
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BigEndian<u32> offset_to_clut;
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BigEndian<u32> offset_to_a_curves;
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};
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static_assert(AssertSize<AdvancedLUTHeader, 24>());
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// ICC v4, Table 46 — lutAToBType CLUT encoding
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// ICC v4, Table 48 — lutBToAType CLUT encoding
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// (They're identical.)
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struct CLUTHeader {
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u8 number_of_grid_points_in_dimension[16];
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u8 precision_of_data_elements; // 1 for u8 entries, 2 for u16 entries.
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u8 reserved_for_padding[3];
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};
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static_assert(AssertSize<CLUTHeader, 20>());
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}
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