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- /*
- * Copyright (c) 2023, Nico Weber <thakis@chromium.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <AK/Utf16View.h>
- #include <LibGfx/ICC/BinaryFormat.h>
- #include <LibGfx/ICC/BinaryWriter.h>
- #include <LibGfx/ICC/Profile.h>
- #include <time.h>
- #pragma GCC diagnostic ignored "-Warray-bounds"
- namespace Gfx::ICC {
- static ErrorOr<ByteBuffer> encode_chromaticity(ChromaticityTagData const& tag_data)
- {
- // ICC v4, 10.2 chromaticityType
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + 2 * sizeof(u16) + tag_data.xy_coordinates().size() * 2 * sizeof(u16Fixed16Number)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)ChromaticityTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- *bit_cast<BigEndian<u16>*>(bytes.data() + 8) = tag_data.xy_coordinates().size();
- *bit_cast<BigEndian<u16>*>(bytes.data() + 10) = (u16)tag_data.phosphor_or_colorant_type();
- auto* coordinates = bit_cast<BigEndian<u16Fixed16Number>*>(bytes.data() + 12);
- for (size_t i = 0; i < tag_data.xy_coordinates().size(); ++i) {
- coordinates[2 * i] = tag_data.xy_coordinates()[i].x.raw();
- coordinates[2 * i + 1] = tag_data.xy_coordinates()[i].y.raw();
- }
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_cipc(CicpTagData const& tag_data)
- {
- // ICC v4, 10.3 cicpType
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + 4));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)CicpTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- bytes.data()[8] = tag_data.color_primaries();
- bytes.data()[9] = tag_data.transfer_characteristics();
- bytes.data()[10] = tag_data.matrix_coefficients();
- bytes.data()[11] = tag_data.video_full_range_flag();
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_curve(CurveTagData const& tag_data)
- {
- // ICC v4, 10.6 curveType
- auto bytes = TRY(ByteBuffer::create_uninitialized(3 * sizeof(u32) + tag_data.values().size() * sizeof(u16)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)CurveTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 8) = tag_data.values().size();
- auto* values = bit_cast<BigEndian<u16>*>(bytes.data() + 12);
- for (size_t i = 0; i < tag_data.values().size(); ++i)
- values[i] = tag_data.values()[i];
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_measurement(MeasurementTagData const& tag_data)
- {
- // ICC v4, 10.14 measurementType
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + sizeof(MeasurementHeader)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)MeasurementTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- auto& header = *bit_cast<MeasurementHeader*>(bytes.data() + 8);
- header.standard_observer = tag_data.standard_observer();
- header.tristimulus_value_for_measurement_backing = tag_data.tristimulus_value_for_measurement_backing();
- header.measurement_geometry = tag_data.measurement_geometry();
- header.measurement_flare = tag_data.measurement_flare().raw();
- header.standard_illuminant = tag_data.standard_illuminant();
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_multi_localized_unicode(MultiLocalizedUnicodeTagData const& tag_data)
- {
- // ICC v4, 10.15 multiLocalizedUnicodeType
- // "The Unicode strings in storage should be encoded as 16-bit big-endian, UTF-16BE,
- // and should not be NULL terminated."
- size_t number_of_records = tag_data.records().size();
- size_t header_and_record_size = 4 * sizeof(u32) + number_of_records * sizeof(MultiLocalizedUnicodeRawRecord);
- size_t number_of_codepoints = 0;
- Vector<Utf16Data> utf16_strings;
- TRY(utf16_strings.try_ensure_capacity(number_of_records));
- for (auto const& record : tag_data.records()) {
- TRY(utf16_strings.try_append(TRY(utf8_to_utf16(record.text))));
- number_of_codepoints += utf16_strings.last().size();
- }
- size_t string_table_size = number_of_codepoints * sizeof(u16);
- auto bytes = TRY(ByteBuffer::create_uninitialized(header_and_record_size + string_table_size));
- auto* header = bit_cast<BigEndian<u32>*>(bytes.data());
- header[0] = (u32)MultiLocalizedUnicodeTagData::Type;
- header[1] = 0;
- header[2] = number_of_records;
- header[3] = sizeof(MultiLocalizedUnicodeRawRecord);
- size_t offset = header_and_record_size;
- auto* records = bit_cast<MultiLocalizedUnicodeRawRecord*>(bytes.data() + 16);
- for (size_t i = 0; i < number_of_records; ++i) {
- records[i].language_code = tag_data.records()[i].iso_639_1_language_code;
- records[i].country_code = tag_data.records()[i].iso_3166_1_country_code;
- records[i].string_length_in_bytes = utf16_strings[i].size() * sizeof(u16);
- records[i].string_offset_in_bytes = offset;
- offset += records[i].string_offset_in_bytes;
- }
- auto* string_table = bit_cast<BigEndian<u16>*>(bytes.data() + header_and_record_size);
- for (auto const& utf16_string : utf16_strings) {
- for (size_t i = 0; i < utf16_string.size(); ++i)
- string_table[i] = utf16_string[i];
- string_table += utf16_string.size();
- }
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_parametric_curve(ParametricCurveTagData const& tag_data)
- {
- // ICC v4, 10.18 parametricCurveType
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + 2 * sizeof(u16) + tag_data.parameter_count() * sizeof(s15Fixed16Number)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)ParametricCurveTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- *bit_cast<BigEndian<u16>*>(bytes.data() + 8) = (u16)tag_data.function_type();
- *bit_cast<BigEndian<u16>*>(bytes.data() + 10) = 0;
- auto* parameters = bit_cast<BigEndian<s15Fixed16Number>*>(bytes.data() + 12);
- for (size_t i = 0; i < tag_data.parameter_count(); ++i)
- parameters[i] = tag_data.parameter(i).raw();
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_s15_fixed_array(S15Fixed16ArrayTagData const& tag_data)
- {
- // ICC v4, 10.22 s15Fixed16ArrayType
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + tag_data.values().size() * sizeof(s15Fixed16Number)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)S15Fixed16ArrayTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- auto* values = bit_cast<BigEndian<s15Fixed16Number>*>(bytes.data() + 8);
- for (size_t i = 0; i < tag_data.values().size(); ++i)
- values[i] = tag_data.values()[i].raw();
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_signature(SignatureTagData const& tag_data)
- {
- // ICC v4, 10.23 signatureType
- auto bytes = TRY(ByteBuffer::create_uninitialized(3 * sizeof(u32)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)SignatureTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 8) = tag_data.signature();
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_text(TextTagData const& tag_data)
- {
- // ICC v4, 10.24 textType
- // "The textType is a simple text structure that contains a 7-bit ASCII text string. The length of the string is obtained
- // by subtracting 8 from the element size portion of the tag itself. This string shall be terminated with a 00h byte."
- auto text_bytes = tag_data.text().bytes();
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + text_bytes.size() + 1));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)TextTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- memcpy(bytes.data() + 8, text_bytes.data(), text_bytes.size());
- *(bytes.data() + 8 + text_bytes.size()) = '\0';
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_viewing_conditions(ViewingConditionsTagData const& tag_data)
- {
- // ICC v4, 10.30 viewingConditionsType
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + sizeof(ViewingConditionsHeader)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)ViewingConditionsTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- auto& header = *bit_cast<ViewingConditionsHeader*>(bytes.data() + 8);
- header.unnormalized_ciexyz_values_for_illuminant = tag_data.unnormalized_ciexyz_values_for_illuminant();
- header.unnormalized_ciexyz_values_for_surround = tag_data.unnormalized_ciexyz_values_for_surround();
- header.illuminant_type = tag_data.illuminant_type();
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_xyz(XYZTagData const& tag_data)
- {
- // ICC v4, 10.31 XYZType
- auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + tag_data.xyzs().size() * sizeof(XYZNumber)));
- *bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)XYZTagData::Type;
- *bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
- auto* xyzs = bit_cast<XYZNumber*>(bytes.data() + 8);
- for (size_t i = 0; i < tag_data.xyzs().size(); ++i)
- xyzs[i] = tag_data.xyzs()[i];
- return bytes;
- }
- static ErrorOr<ByteBuffer> encode_tag_data(TagData const& tag_data)
- {
- switch (tag_data.type()) {
- case ChromaticityTagData::Type:
- return encode_chromaticity(static_cast<ChromaticityTagData const&>(tag_data));
- case CicpTagData::Type:
- return encode_cipc(static_cast<CicpTagData const&>(tag_data));
- case CurveTagData::Type:
- return encode_curve(static_cast<CurveTagData const&>(tag_data));
- case MeasurementTagData::Type:
- return encode_measurement(static_cast<MeasurementTagData const&>(tag_data));
- case MultiLocalizedUnicodeTagData::Type:
- return encode_multi_localized_unicode(static_cast<MultiLocalizedUnicodeTagData const&>(tag_data));
- case ParametricCurveTagData::Type:
- return encode_parametric_curve(static_cast<ParametricCurveTagData const&>(tag_data));
- case S15Fixed16ArrayTagData::Type:
- return encode_s15_fixed_array(static_cast<S15Fixed16ArrayTagData const&>(tag_data));
- case SignatureTagData::Type:
- return encode_signature(static_cast<SignatureTagData const&>(tag_data));
- case TextTagData::Type:
- return encode_text(static_cast<TextTagData const&>(tag_data));
- case ViewingConditionsTagData::Type:
- return encode_viewing_conditions(static_cast<ViewingConditionsTagData const&>(tag_data));
- case XYZTagData::Type:
- return encode_xyz(static_cast<XYZTagData const&>(tag_data));
- }
- return ByteBuffer {};
- }
- static ErrorOr<Vector<ByteBuffer>> encode_tag_datas(Profile const& profile, HashMap<TagData*, size_t>& tag_data_map)
- {
- Vector<ByteBuffer> tag_data_bytes;
- TRY(tag_data_bytes.try_ensure_capacity(profile.tag_count()));
- profile.for_each_tag([&](auto, auto tag_data) {
- if (tag_data_map.contains(tag_data.ptr()))
- return;
- // FIXME: Come up with a way to allow TRY instead of MUST here.
- tag_data_bytes.append(MUST(encode_tag_data(tag_data)));
- MUST(tag_data_map.try_set(tag_data.ptr(), tag_data_bytes.size() - 1));
- });
- return tag_data_bytes;
- }
- static ErrorOr<void> encode_tag_table(ByteBuffer& bytes, Profile const& profile, Vector<size_t> const& offsets, Vector<ByteBuffer> const& tag_data_bytes, HashMap<TagData*, size_t> const& tag_data_map)
- {
- VERIFY(bytes.size() >= sizeof(ICCHeader) + sizeof(u32) + profile.tag_count() * sizeof(TagTableEntry));
- *bit_cast<BigEndian<u32>*>(bytes.data() + sizeof(ICCHeader)) = profile.tag_count();
- TagTableEntry* tag_table_entries = bit_cast<TagTableEntry*>(bytes.data() + sizeof(ICCHeader) + sizeof(u32));
- int i = 0;
- profile.for_each_tag([&](auto tag_signature, auto tag_data) {
- tag_table_entries[i].tag_signature = tag_signature;
- auto index = tag_data_map.get(tag_data.ptr()).value();
- tag_table_entries[i].offset_to_beginning_of_tag_data_element = offsets[index];
- tag_table_entries[i].size_of_tag_data_element = tag_data_bytes[index].size();
- ++i;
- });
- return {};
- }
- static ErrorOr<void> encode_header(ByteBuffer& bytes, Profile const& profile)
- {
- VERIFY(bytes.size() >= sizeof(ICCHeader));
- auto& raw_header = *bit_cast<ICCHeader*>(bytes.data());
- raw_header.profile_size = bytes.size();
- raw_header.preferred_cmm_type = profile.preferred_cmm_type().value_or(PreferredCMMType { 0 });
- raw_header.profile_version_major = profile.version().major_version();
- raw_header.profile_version_minor_bugfix = profile.version().minor_and_bugfix_version();
- raw_header.profile_version_zero = 0;
- raw_header.profile_device_class = profile.device_class();
- raw_header.data_color_space = profile.data_color_space();
- raw_header.profile_connection_space = profile.connection_space();
- time_t profile_timestamp = profile.creation_timestamp();
- struct tm tm;
- if (!gmtime_r(&profile_timestamp, &tm))
- return Error::from_errno(errno);
- raw_header.profile_creation_time.year = tm.tm_year + 1900;
- raw_header.profile_creation_time.month = tm.tm_mon + 1;
- raw_header.profile_creation_time.day = tm.tm_mday;
- raw_header.profile_creation_time.hours = tm.tm_hour;
- raw_header.profile_creation_time.minutes = tm.tm_min;
- raw_header.profile_creation_time.seconds = tm.tm_sec;
- raw_header.profile_file_signature = ProfileFileSignature;
- raw_header.primary_platform = profile.primary_platform().value_or(PrimaryPlatform { 0 });
- raw_header.profile_flags = profile.flags().bits();
- raw_header.device_manufacturer = profile.device_manufacturer().value_or(DeviceManufacturer { 0 });
- raw_header.device_model = profile.device_model().value_or(DeviceModel { 0 });
- raw_header.device_attributes = profile.device_attributes().bits();
- raw_header.rendering_intent = profile.rendering_intent();
- raw_header.pcs_illuminant = profile.pcs_illuminant();
- raw_header.profile_creator = profile.creator().value_or(Creator { 0 });
- memset(raw_header.reserved, 0, sizeof(raw_header.reserved));
- auto id = Profile::compute_id(bytes);
- static_assert(sizeof(id.data) == sizeof(raw_header.profile_id));
- memcpy(raw_header.profile_id, id.data, sizeof(id.data));
- return {};
- }
- ErrorOr<ByteBuffer> encode(Profile const& profile)
- {
- // Valid profiles always have tags. Profile only represents valid profiles.
- VERIFY(profile.tag_count() > 0);
- HashMap<TagData*, size_t> tag_data_map;
- Vector<ByteBuffer> tag_data_bytes = TRY(encode_tag_datas(profile, tag_data_map));
- size_t tag_table_size = sizeof(u32) + profile.tag_count() * sizeof(TagTableEntry);
- size_t offset = sizeof(ICCHeader) + tag_table_size;
- Vector<size_t> offsets;
- for (auto const& bytes : tag_data_bytes) {
- TRY(offsets.try_append(offset));
- offset += align_up_to(bytes.size(), 4);
- }
- // Omit padding after last element.
- // FIXME: Is that correct?
- size_t total_size = offsets.last() + tag_data_bytes.last().size();
- // Leave enough room for the profile header and the tag table count.
- auto bytes = TRY(ByteBuffer::create_zeroed(total_size));
- for (size_t i = 0; i < tag_data_bytes.size(); ++i)
- memcpy(bytes.data() + offsets[i], tag_data_bytes[i].data(), tag_data_bytes[i].size());
- TRY(encode_tag_table(bytes, profile, offsets, tag_data_bytes, tag_data_map));
- TRY(encode_header(bytes, profile));
- return bytes;
- }
- }
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