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serenity/Userland/Libraries/LibGfx/ICC/Profile.cpp
Nico Weber e9dcc49f9c LibGfx: Validate tag types of AToBNTag, BToANTag, gamutTag, previewNTag 
Also rewrite a few of the existing tag type checks using a new helper.
2023-01-29 11:40:14 +00:00

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/*
* Copyright (c) 2022-2023, Nico Weber <thakis@chromium.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Endian.h>
#include <LibGfx/ICC/Profile.h>
#include <LibGfx/ICC/Tags.h>
#include <math.h>
#include <time.h>
// V2 spec: https://color.org/specification/ICC.1-2001-04.pdf
// V4 spec: https://color.org/specification/ICC.1-2022-05.pdf
namespace Gfx::ICC {
namespace {
// ICC V4, 4.2 dateTimeNumber
// "All the dateTimeNumber values in a profile shall be in Coordinated Universal Time [...]."
struct DateTimeNumber {
BigEndian<u16> year;
BigEndian<u16> month;
BigEndian<u16> day;
BigEndian<u16> hours;
BigEndian<u16> minutes;
BigEndian<u16> seconds;
};
// ICC V4, 4.6 s15Fixed16Number
using s15Fixed16Number = i32;
// ICC V4, 4.14 XYZNumber
struct XYZNumber {
BigEndian<s15Fixed16Number> x;
BigEndian<s15Fixed16Number> y;
BigEndian<s15Fixed16Number> z;
operator XYZ() const
{
return XYZ { x / (double)0x1'0000, y / (double)0x1'0000, z / (double)0x1'0000 };
}
};
ErrorOr<time_t> parse_date_time_number(DateTimeNumber const& date_time)
{
// ICC V4, 4.2 dateTimeNumber
// "Number of the month (1 to 12)"
if (date_time.month < 1 || date_time.month > 12)
return Error::from_string_literal("ICC::Profile: dateTimeNumber month out of bounds");
// "Number of the day of the month (1 to 31)"
if (date_time.day < 1 || date_time.day > 31)
return Error::from_string_literal("ICC::Profile: dateTimeNumber day out of bounds");
// "Number of hours (0 to 23)"
if (date_time.hours > 23)
return Error::from_string_literal("ICC::Profile: dateTimeNumber hours out of bounds");
// "Number of minutes (0 to 59)"
if (date_time.minutes > 59)
return Error::from_string_literal("ICC::Profile: dateTimeNumber minutes out of bounds");
// "Number of seconds (0 to 59)"
// ICC profiles apparently can't be created during leap seconds (seconds would be 60 there, but the spec doesn't allow that).
if (date_time.seconds > 59)
return Error::from_string_literal("ICC::Profile: dateTimeNumber seconds out of bounds");
struct tm tm = {};
tm.tm_year = date_time.year - 1900;
tm.tm_mon = date_time.month - 1;
tm.tm_mday = date_time.day;
tm.tm_hour = date_time.hours;
tm.tm_min = date_time.minutes;
tm.tm_sec = date_time.seconds;
// timegm() doesn't read tm.tm_isdst, tm.tm_wday, and tm.tm_yday, no need to fill them in.
time_t timestamp = timegm(&tm);
if (timestamp == -1)
return Error::from_string_literal("ICC::Profile: dateTimeNumber not representable as timestamp");
return timestamp;
}
// ICC V4, 7.2 Profile header
struct ICCHeader {
BigEndian<u32> profile_size;
BigEndian<PreferredCMMType> preferred_cmm_type;
u8 profile_version_major;
u8 profile_version_minor_bugfix;
BigEndian<u16> profile_version_zero;
BigEndian<DeviceClass> profile_device_class;
BigEndian<ColorSpace> data_color_space;
BigEndian<ColorSpace> profile_connection_space; // "PCS" in the spec.
DateTimeNumber profile_creation_time;
BigEndian<u32> profile_file_signature;
BigEndian<PrimaryPlatform> primary_platform;
BigEndian<u32> profile_flags;
BigEndian<DeviceManufacturer> device_manufacturer;
BigEndian<DeviceModel> device_model;
BigEndian<u64> device_attributes;
BigEndian<u32> rendering_intent;
XYZNumber pcs_illuminant;
BigEndian<Creator> profile_creator;
u8 profile_id[16];
u8 reserved[28];
};
static_assert(AssertSize<ICCHeader, 128>());
ErrorOr<u32> parse_size(ICCHeader const& header, ReadonlyBytes icc_bytes)
{
// ICC v4, 7.2.2 Profile size field
// "The value in the profile size field shall be the exact size obtained by combining the profile header,
// the tag table, and the tagged element data, including the pad bytes for the last tag."
// Valid files have enough data for profile header and tag table entry count.
if (header.profile_size < sizeof(ICCHeader) + sizeof(u32))
return Error::from_string_literal("ICC::Profile: Profile size too small");
if (header.profile_size > icc_bytes.size())
return Error::from_string_literal("ICC::Profile: Profile size larger than input data");
return header.profile_size;
}
Optional<PreferredCMMType> parse_preferred_cmm_type(ICCHeader const& header)
{
// ICC v4, 7.2.3 Preferred CMM type field
// "This field may be used to identify the preferred CMM to be used.
// If used, it shall match a CMM type signature registered in the ICC Tag Registry"
// https://www.color.org/signatures2.xalter currently links to
// https://www.color.org/registry/signature/TagRegistry-2021-03.pdf, which contains
// some CMM signatures.
// This requirement is often honored in practice, but not always. For example,
// JPEGs exported in Adobe Lightroom contain profiles that set this to 'Lino',
// which is not present in the "CMM Signatures" table in that PDF.
// "If no preferred CMM is identified, this field shall be set to zero (00000000h)."
if (header.preferred_cmm_type == PreferredCMMType { 0 })
return {};
return header.preferred_cmm_type;
}
ErrorOr<Version> parse_version(ICCHeader const& header)
{
// ICC v4, 7.2.4 Profile version field
if (header.profile_version_zero != 0)
return Error::from_string_literal("ICC::Profile: Reserved version bytes not zero");
return Version(header.profile_version_major, header.profile_version_minor_bugfix);
}
ErrorOr<DeviceClass> parse_device_class(ICCHeader const& header)
{
// ICC v4, 7.2.5 Profile/device class field
switch (header.profile_device_class) {
case DeviceClass::InputDevice:
case DeviceClass::DisplayDevice:
case DeviceClass::OutputDevice:
case DeviceClass::DeviceLink:
case DeviceClass::ColorSpace:
case DeviceClass::Abstract:
case DeviceClass::NamedColor:
return header.profile_device_class;
}
return Error::from_string_literal("ICC::Profile: Invalid device class");
}
ErrorOr<ColorSpace> parse_color_space(ColorSpace color_space)
{
// ICC v4, Table 19 — Data colour space signatures
switch (color_space) {
case ColorSpace::nCIEXYZ:
case ColorSpace::CIELAB:
case ColorSpace::CIELUV:
case ColorSpace::YCbCr:
case ColorSpace::CIEYxy:
case ColorSpace::RGB:
case ColorSpace::Gray:
case ColorSpace::HSV:
case ColorSpace::HLS:
case ColorSpace::CMYK:
case ColorSpace::CMY:
case ColorSpace::TwoColor:
case ColorSpace::ThreeColor:
case ColorSpace::FourColor:
case ColorSpace::FiveColor:
case ColorSpace::SixColor:
case ColorSpace::SevenColor:
case ColorSpace::EightColor:
case ColorSpace::NineColor:
case ColorSpace::TenColor:
case ColorSpace::ElevenColor:
case ColorSpace::TwelveColor:
case ColorSpace::ThirteenColor:
case ColorSpace::FourteenColor:
case ColorSpace::FifteenColor:
return color_space;
}
return Error::from_string_literal("ICC::Profile: Invalid color space");
}
ErrorOr<ColorSpace> parse_data_color_space(ICCHeader const& header)
{
// ICC v4, 7.2.6 Data colour space field
return parse_color_space(header.data_color_space);
}
ErrorOr<ColorSpace> parse_connection_space(ICCHeader const& header)
{
// ICC v4, 7.2.7 PCS field
// and Annex D
auto space = TRY(parse_color_space(header.profile_connection_space));
if (header.profile_device_class != DeviceClass::DeviceLink && (space != ColorSpace::PCSXYZ && space != ColorSpace::PCSLAB))
return Error::from_string_literal("ICC::Profile: Invalid profile connection space: Non-PCS space on non-DeviceLink profile");
return space;
}
ErrorOr<time_t> parse_creation_date_time(ICCHeader const& header)
{
// ICC v4, 7.2.8 Date and time field
return parse_date_time_number(header.profile_creation_time);
}
ErrorOr<void> parse_file_signature(ICCHeader const& header)
{
// ICC v4, 7.2.9 Profile file signature field
// "The profile file signature field shall contain the value “acsp” (61637370h) as a profile file signature."
if (header.profile_file_signature != 0x61637370)
return Error::from_string_literal("ICC::Profile: profile file signature not 'acsp'");
return {};
}
ErrorOr<Optional<PrimaryPlatform>> parse_primary_platform(ICCHeader const& header)
{
// ICC v4, 7.2.10 Primary platform field
// "If there is no primary platform identified, this field shall be set to zero (00000000h)."
if (header.primary_platform == PrimaryPlatform { 0 })
return OptionalNone {};
switch (header.primary_platform) {
case PrimaryPlatform::Apple:
case PrimaryPlatform::Microsoft:
case PrimaryPlatform::SiliconGraphics:
case PrimaryPlatform::Sun:
return header.primary_platform;
}
return Error::from_string_literal("ICC::Profile: Invalid primary platform");
}
Optional<DeviceManufacturer> parse_device_manufacturer(ICCHeader const& header)
{
// ICC v4, 7.2.12 Device manufacturer field
// "This field may be used to identify a device manufacturer.
// If used the signature shall match the signature contained in the appropriate section of the ICC signature registry found at www.color.org"
// Device manufacturers can be looked up at https://www.color.org/signatureRegistry/index.xalter
// For example: https://www.color.org/signatureRegistry/?entityEntry=APPL-4150504C
// Some icc files use codes not in that registry. For example. D50_XYZ.icc from https://www.color.org/XYZprofiles.xalter
// has its device manufacturer set to 'none', but https://www.color.org/signatureRegistry/?entityEntry=none-6E6F6E65 does not exist.
// "If not used this field shall be set to zero (00000000h)."
if (header.device_manufacturer == DeviceManufacturer { 0 })
return {};
return header.device_manufacturer;
}
Optional<DeviceModel> parse_device_model(ICCHeader const& header)
{
// ICC v4, 7.2.13 Device model field
// "This field may be used to identify a device model.
// If used the signature shall match the signature contained in the appropriate section of the ICC signature registry found at www.color.org"
// Device models can be looked up at https://www.color.org/signatureRegistry/deviceRegistry/index.xalter
// For example: https://www.color.org/signatureRegistry/deviceRegistry/?entityEntry=7FD8-37464438
// Some icc files use codes not in that registry. For example. D50_XYZ.icc from https://www.color.org/XYZprofiles.xalter
// has its device model set to 'none', but https://www.color.org/signatureRegistry/deviceRegistry?entityEntry=none-6E6F6E65 does not exist.
// "If not used this field shall be set to zero (00000000h)."
if (header.device_model == DeviceModel { 0 })
return {};
return header.device_model;
}
ErrorOr<DeviceAttributes> parse_device_attributes(ICCHeader const& header)
{
// ICC v4, 7.2.14 Device attributes field
// "4 to 31": "Reserved (set to binary zero)"
if (header.device_attributes & 0xffff'fff0)
return Error::from_string_literal("ICC::Profile: Device attributes reserved bits not set to 0");
return DeviceAttributes { header.device_attributes };
}
ErrorOr<RenderingIntent> parse_rendering_intent(ICCHeader const& header)
{
// ICC v4, 7.2.15 Rendering intent field
switch (header.rendering_intent) {
case 0:
return RenderingIntent::Perceptual;
case 1:
return RenderingIntent::MediaRelativeColorimetric;
case 2:
return RenderingIntent::Saturation;
case 3:
return RenderingIntent::ICCAbsoluteColorimetric;
}
return Error::from_string_literal("ICC::Profile: Invalid rendering intent");
}
ErrorOr<XYZ> parse_pcs_illuminant(ICCHeader const& header)
{
// ICC v4, 7.2.16 PCS illuminant field
XYZ xyz = (XYZ)header.pcs_illuminant;
/// "The value, when rounded to four decimals, shall be X = 0,9642, Y = 1,0 and Z = 0,8249."
if (round(xyz.x * 10'000) != 9'642 || round(xyz.y * 10'000) != 10'000 || round(xyz.z * 10'000) != 8'249)
return Error::from_string_literal("ICC::Profile: Invalid pcs illuminant");
return xyz;
}
Optional<Creator> parse_profile_creator(ICCHeader const& header)
{
// ICC v4, 7.2.17 Profile creator field
// "This field may be used to identify the creator of the profile.
// If used the signature should match the signature contained in the device manufacturer section of the ICC signature registry found at www.color.org."
// This is not always true in practice.
// For example, .icc files in /System/ColorSync/Profiles on macOS 12.6 set this to 'appl', which is a CMM signature, not a device signature (that one would be 'APPL').
// "If not used this field shall be set to zero (00000000h)."
if (header.profile_creator == Creator { 0 })
return {};
return header.profile_creator;
}
template<size_t N>
bool all_bytes_are_zero(const u8 (&bytes)[N])
{
for (u8 byte : bytes) {
if (byte != 0)
return false;
}
return true;
}
ErrorOr<Optional<Crypto::Hash::MD5::DigestType>> parse_profile_id(ICCHeader const& header, ReadonlyBytes icc_bytes)
{
// ICC v4, 7.2.18 Profile ID field
// "A profile ID field value of zero (00h) shall indicate that a profile ID has not been calculated."
if (all_bytes_are_zero(header.profile_id))
return OptionalNone {};
Crypto::Hash::MD5::DigestType id;
static_assert(sizeof(id.data) == sizeof(header.profile_id));
memcpy(id.data, header.profile_id, sizeof(id.data));
auto computed_id = Profile::compute_id(icc_bytes);
if (id != computed_id)
return Error::from_string_literal("ICC::Profile: Invalid profile id");
return id;
}
ErrorOr<void> parse_reserved(ICCHeader const& header)
{
// ICC v4, 7.2.19 Reserved field
// "This field of the profile header is reserved for future ICC definition and shall be set to zero."
if (!all_bytes_are_zero(header.reserved))
return Error::from_string_literal("ICC::Profile: Reserved header bytes are not zero");
return {};
}
}
URL device_manufacturer_url(DeviceManufacturer device_manufacturer)
{
return URL(DeprecatedString::formatted("https://www.color.org/signatureRegistry/?entityEntry={:c}{:c}{:c}{:c}-{:08X}",
device_manufacturer.c0(), device_manufacturer.c1(), device_manufacturer.c2(), device_manufacturer.c3(), device_manufacturer.value));
}
URL device_model_url(DeviceModel device_model)
{
return URL(DeprecatedString::formatted("https://www.color.org/signatureRegistry/deviceRegistry/?entityEntry={:c}{:c}{:c}{:c}-{:08X}",
device_model.c0(), device_model.c1(), device_model.c2(), device_model.c3(), device_model.value));
}
StringView device_class_name(DeviceClass device_class)
{
switch (device_class) {
case DeviceClass::InputDevice:
return "InputDevice"sv;
case DeviceClass::DisplayDevice:
return "DisplayDevice"sv;
case DeviceClass::OutputDevice:
return "OutputDevice"sv;
case DeviceClass::DeviceLink:
return "DeviceLink"sv;
case DeviceClass::ColorSpace:
return "ColorSpace"sv;
case DeviceClass::Abstract:
return "Abstract"sv;
case DeviceClass::NamedColor:
return "NamedColor"sv;
}
VERIFY_NOT_REACHED();
}
StringView data_color_space_name(ColorSpace color_space)
{
switch (color_space) {
case ColorSpace::nCIEXYZ:
return "nCIEXYZ"sv;
case ColorSpace::CIELAB:
return "CIELAB"sv;
case ColorSpace::CIELUV:
return "CIELUV"sv;
case ColorSpace::YCbCr:
return "YCbCr"sv;
case ColorSpace::CIEYxy:
return "CIEYxy"sv;
case ColorSpace::RGB:
return "RGB"sv;
case ColorSpace::Gray:
return "Gray"sv;
case ColorSpace::HSV:
return "HSV"sv;
case ColorSpace::HLS:
return "HLS"sv;
case ColorSpace::CMYK:
return "CMYK"sv;
case ColorSpace::CMY:
return "CMY"sv;
case ColorSpace::TwoColor:
return "2 color"sv;
case ColorSpace::ThreeColor:
return "3 color (other than XYZ, Lab, Luv, YCbCr, CIEYxy, RGB, HSV, HLS, CMY)"sv;
case ColorSpace::FourColor:
return "4 color (other than CMYK)"sv;
case ColorSpace::FiveColor:
return "5 color"sv;
case ColorSpace::SixColor:
return "6 color"sv;
case ColorSpace::SevenColor:
return "7 color"sv;
case ColorSpace::EightColor:
return "8 color"sv;
case ColorSpace::NineColor:
return "9 color"sv;
case ColorSpace::TenColor:
return "10 color"sv;
case ColorSpace::ElevenColor:
return "11 color"sv;
case ColorSpace::TwelveColor:
return "12 color"sv;
case ColorSpace::ThirteenColor:
return "13 color"sv;
case ColorSpace::FourteenColor:
return "14 color"sv;
case ColorSpace::FifteenColor:
return "15 color"sv;
}
VERIFY_NOT_REACHED();
}
StringView profile_connection_space_name(ColorSpace color_space)
{
switch (color_space) {
case ColorSpace::PCSXYZ:
return "PCSXYZ"sv;
case ColorSpace::PCSLAB:
return "PCSLAB"sv;
default:
return data_color_space_name(color_space);
}
}
StringView primary_platform_name(PrimaryPlatform primary_platform)
{
switch (primary_platform) {
case PrimaryPlatform::Apple:
return "Apple"sv;
case PrimaryPlatform::Microsoft:
return "Microsoft"sv;
case PrimaryPlatform::SiliconGraphics:
return "Silicon Graphics"sv;
case PrimaryPlatform::Sun:
return "Sun"sv;
}
VERIFY_NOT_REACHED();
}
StringView rendering_intent_name(RenderingIntent rendering_intent)
{
switch (rendering_intent) {
case RenderingIntent::Perceptual:
return "Perceptual"sv;
case RenderingIntent::MediaRelativeColorimetric:
return "Media-relative colorimetric"sv;
case RenderingIntent::Saturation:
return "Saturation"sv;
case RenderingIntent::ICCAbsoluteColorimetric:
return "ICC-absolute colorimetric"sv;
}
VERIFY_NOT_REACHED();
}
Flags::Flags() = default;
Flags::Flags(u32 bits)
: m_bits(bits)
{
}
DeviceAttributes::DeviceAttributes() = default;
DeviceAttributes::DeviceAttributes(u64 bits)
: m_bits(bits)
{
}
ErrorOr<void> Profile::read_header(ReadonlyBytes bytes)
{
if (bytes.size() < sizeof(ICCHeader))
return Error::from_string_literal("ICC::Profile: Not enough data for header");
auto header = *bit_cast<ICCHeader const*>(bytes.data());
TRY(parse_file_signature(header));
m_on_disk_size = TRY(parse_size(header, bytes));
m_preferred_cmm_type = parse_preferred_cmm_type(header);
m_version = TRY(parse_version(header));
m_device_class = TRY(parse_device_class(header));
m_data_color_space = TRY(parse_data_color_space(header));
m_connection_space = TRY(parse_connection_space(header));
m_creation_timestamp = TRY(parse_creation_date_time(header));
m_primary_platform = TRY(parse_primary_platform(header));
m_flags = Flags { header.profile_flags };
m_device_manufacturer = parse_device_manufacturer(header);
m_device_model = parse_device_model(header);
m_device_attributes = TRY(parse_device_attributes(header));
m_rendering_intent = TRY(parse_rendering_intent(header));
m_pcs_illuminant = TRY(parse_pcs_illuminant(header));
m_creator = parse_profile_creator(header);
m_id = TRY(parse_profile_id(header, bytes));
TRY(parse_reserved(header));
return {};
}
ErrorOr<NonnullRefPtr<TagData>> Profile::read_tag(ReadonlyBytes bytes, u32 offset_to_beginning_of_tag_data_element, u32 size_of_tag_data_element)
{
if (offset_to_beginning_of_tag_data_element + size_of_tag_data_element > bytes.size())
return Error::from_string_literal("ICC::Profile: Tag data out of bounds");
auto tag_bytes = bytes.slice(offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
// ICC v4, 9 Tag definitions
// ICC v4, 9.1 General
// "All tags, including private tags, have as their first four bytes a tag signature to identify to profile readers
// what kind of data is contained within a tag."
if (tag_bytes.size() < sizeof(u32))
return Error::from_string_literal("ICC::Profile: Not enough data for tag type");
auto type = tag_type(tag_bytes);
switch (type) {
case CurveTagData::Type:
return CurveTagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case Lut16TagData::Type:
return Lut16TagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case Lut8TagData::Type:
return Lut8TagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case MultiLocalizedUnicodeTagData::Type:
return MultiLocalizedUnicodeTagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case ParametricCurveTagData::Type:
return ParametricCurveTagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case S15Fixed16ArrayTagData::Type:
return S15Fixed16ArrayTagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case TextDescriptionTagData::Type:
return TextDescriptionTagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case TextTagData::Type:
return TextTagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
case XYZTagData::Type:
return XYZTagData::from_bytes(tag_bytes, offset_to_beginning_of_tag_data_element, size_of_tag_data_element);
default:
// FIXME: optionally ignore tags of unknown type
return adopt_ref(*new UnknownTagData(offset_to_beginning_of_tag_data_element, size_of_tag_data_element, type));
}
}
ErrorOr<void> Profile::read_tag_table(ReadonlyBytes bytes)
{
// ICC v4, 7.3 Tag table
// ICC v4, 7.3.1 Overview
// "The tag table acts as a table of contents for the tags and an index into the tag data element in the profiles. It
// shall consist of a 4-byte entry that contains a count of the number of tags in the table followed by a series of 12-
// byte entries with one entry for each tag. The tag table therefore contains 4+12n bytes where n is the number of
// tags contained in the profile. The entries for the tags within the table are not required to be in any particular
// order nor are they required to match the sequence of tag data element within the profile.
// Each 12-byte tag entry following the tag count shall consist of a 4-byte tag signature, a 4-byte offset to define
// the beginning of the tag data element, and a 4-byte entry identifying the length of the tag data element in bytes.
// [...]
// The tag table shall define a contiguous sequence of unique tag elements, with no gaps between the last byte
// of any tag data element referenced from the tag table (inclusive of any necessary additional pad bytes required
// to reach a four-byte boundary) and the byte offset of the following tag element, or the end of the file.
// Duplicate tag signatures shall not be included in the tag table.
// Tag data elements shall not partially overlap, so there shall be no part of any tag data element that falls within
// the range defined for another tag in the tag table."
ReadonlyBytes tag_table_bytes = bytes.slice(sizeof(ICCHeader));
if (tag_table_bytes.size() < sizeof(u32))
return Error::from_string_literal("ICC::Profile: Not enough data for tag count");
auto tag_count = *bit_cast<BigEndian<u32> const*>(tag_table_bytes.data());
// ICC V4, 7.3 Tag table, Table 24 - Tag table structure
struct TagTableEntry {
BigEndian<TagSignature> tag_signature;
BigEndian<u32> offset_to_beginning_of_tag_data_element;
BigEndian<u32> size_of_tag_data_element;
};
static_assert(AssertSize<TagTableEntry, 12>());
tag_table_bytes = tag_table_bytes.slice(sizeof(u32));
if (tag_table_bytes.size() < tag_count * sizeof(TagTableEntry))
return Error::from_string_literal("ICC::Profile: Not enough data for tag table entries");
auto tag_table_entries = bit_cast<TagTableEntry const*>(tag_table_bytes.data());
// "The tag table may contain multiple tags signatures that all reference the same tag data element offset, allowing
// efficient reuse of tag data elements."
HashMap<u32, NonnullRefPtr<TagData>> offset_to_tag_data;
for (u32 i = 0; i < tag_count; ++i) {
// FIXME: optionally ignore tags with unknown signature
// Dedupe identical offset/sizes.
NonnullRefPtr<TagData> tag_data = TRY(offset_to_tag_data.try_ensure(tag_table_entries[i].offset_to_beginning_of_tag_data_element, [=, this]() {
return read_tag(bytes, tag_table_entries[i].offset_to_beginning_of_tag_data_element, tag_table_entries[i].size_of_tag_data_element);
}));
// "In such cases, both the offset and size of the tag data elements in the tag table shall be the same."
if (tag_data->size() != tag_table_entries[i].size_of_tag_data_element)
return Error::from_string_literal("ICC::Profile: two tags have same offset but different sizes");
// "Duplicate tag signatures shall not be included in the tag table."
if (TRY(m_tag_table.try_set(tag_table_entries[i].tag_signature, move(tag_data))) != AK::HashSetResult::InsertedNewEntry)
return Error::from_string_literal("ICC::Profile: duplicate tag signature");
}
return {};
}
static bool is_xCLR(ColorSpace color_space)
{
switch (color_space) {
case ColorSpace::TwoColor:
case ColorSpace::ThreeColor:
case ColorSpace::FourColor:
case ColorSpace::FiveColor:
case ColorSpace::SixColor:
case ColorSpace::SevenColor:
case ColorSpace::EightColor:
case ColorSpace::NineColor:
case ColorSpace::TenColor:
case ColorSpace::ElevenColor:
case ColorSpace::TwelveColor:
case ColorSpace::ThirteenColor:
case ColorSpace::FourteenColor:
case ColorSpace::FifteenColor:
return true;
default:
return false;
}
}
ErrorOr<void> Profile::check_required_tags()
{
// ICC v4, 8 Required tags
// ICC v4, 8.2 Common requirements
// "With the exception of DeviceLink profiles, all profiles shall contain the following tags:
// - profileDescriptionTag (see 9.2.41);
// - copyrightTag (see 9.2.21);
// - mediaWhitePointTag (see 9.2.34);
// - chromaticAdaptationTag, when the measurement data used to calculate the profile was specified for an
// adopted white with a chromaticity different from that of the PCS adopted white (see 9.2.15).
// NOTE A DeviceLink profile is not required to have either a mediaWhitePointTag or a chromaticAdaptationTag."
// profileDescriptionTag, copyrightTag are required for DeviceLink too (see ICC v4, 8.6 DeviceLink profile).
// profileDescriptionTag, copyrightTag, mediaWhitePointTag are required in ICC v2 as well.
// chromaticAdaptationTag isn't required in v2 profiles as far as I can tell.
if (!m_tag_table.contains(profileDescriptionTag))
return Error::from_string_literal("ICC::Profile: required profileDescriptionTag is missing");
if (!m_tag_table.contains(copyrightTag))
return Error::from_string_literal("ICC::Profile: required copyrightTag is missing");
if (device_class() != DeviceClass::DeviceLink) {
if (!m_tag_table.contains(mediaWhitePointTag))
return Error::from_string_literal("ICC::Profile: required mediaWhitePointTag is missing");
// FIXME: Check for chromaticAdaptationTag after figuring out when exactly it needs to be present.
}
auto has_tag = [&](auto& tag) { return m_tag_table.contains(tag); };
auto has_all_tags = [&]<class T>(T tags) { return all_of(tags, has_tag); };
switch (device_class()) {
case DeviceClass::InputDevice: {
// ICC v4, 8.3 Input profiles
// "8.3.1 General
// Input profiles are generally used with devices such as scanners and digital cameras. The types of profiles
// available for use as Input profiles are N-component LUT-based, Three-component matrix-based, and
// monochrome.
// 8.3.2 N-component LUT-based Input profiles
// In addition to the tags listed in 8.2 an N-component LUT-based Input profile shall contain the following tag:
// - AToB0Tag (see 9.2.1).
// 8.3.3 Three-component matrix-based Input profiles
// In addition to the tags listed in 8.2, a three-component matrix-based Input profile shall contain the following tags:
// - redMatrixColumnTag (see 9.2.44);
// - greenMatrixColumnTag (see 9.2.30);
// - blueMatrixColumnTag (see 9.2.4);
// - redTRCTag (see 9.2.45);
// - greenTRCTag (see 9.2.31);
// - blueTRCTag (see 9.2.5).
// [...] Only the PCSXYZ encoding can be used with matrix/TRC models.
// 8.3.4 Monochrome Input profiles
// In addition to the tags listed in 8.2, a monochrome Input profile shall contain the following tag:
// - grayTRCTag (see 9.2.29).
bool has_n_component_lut_based_tags = has_tag(AToB0Tag);
bool has_three_component_matrix_based_tags = has_all_tags(Array { redMatrixColumnTag, greenMatrixColumnTag, blueMatrixColumnTag, redTRCTag, greenTRCTag, blueTRCTag });
bool has_monochrome_tags = has_tag(grayTRCTag);
if (!has_n_component_lut_based_tags && !has_three_component_matrix_based_tags && !has_monochrome_tags)
return Error::from_string_literal("ICC::Profile: InputDevice required tags are missing");
if (!has_n_component_lut_based_tags && has_three_component_matrix_based_tags && connection_space() != ColorSpace::PCSXYZ)
return Error::from_string_literal("ICC::Profile: InputDevice three-component matrix-based profile must use PCSXYZ");
break;
}
case DeviceClass::DisplayDevice: {
// ICC v4, 8.4 Display profiles
// "8.4.1 General
// This class of profiles represents display devices such as monitors. The types of profiles available for use as
// Display profiles are N-component LUT-based, Three-component matrix-based, and monochrome.
// 8.4.2 N-Component LUT-based Display profiles
// In addition to the tags listed in 8.2 an N-component LUT-based Input profile shall contain the following tags:
// - AToB0Tag (see 9.2.1);
// - BToA0Tag (see 9.2.6).
// 8.4.3 Three-component matrix-based Display profiles
// In addition to the tags listed in 8.2, a three-component matrix-based Display profile shall contain the following
// tags:
// - redMatrixColumnTag (see 9.2.44);
// - greenMatrixColumnTag (see 9.2.30);
// - blueMatrixColumnTag (see 9.2.4);
// - redTRCTag (see 9.2.45);
// - greenTRCTag (see 9.2.31);
// - blueTRCTag (see 9.2.5).
// [...] Only the PCSXYZ encoding can be used with matrix/TRC models.
// 8.4.4 Monochrome Display profiles
// In addition to the tags listed in 8.2 a monochrome Display profile shall contain the following tag:
// - grayTRCTag (see 9.2.29)."
bool has_n_component_lut_based_tags = has_all_tags(Array { AToB0Tag, BToA0Tag });
bool has_three_component_matrix_based_tags = has_all_tags(Array { redMatrixColumnTag, greenMatrixColumnTag, blueMatrixColumnTag, redTRCTag, greenTRCTag, blueTRCTag });
bool has_monochrome_tags = has_tag(grayTRCTag);
if (!has_n_component_lut_based_tags && !has_three_component_matrix_based_tags && !has_monochrome_tags)
return Error::from_string_literal("ICC::Profile: DisplayDevice required tags are missing");
if (!has_n_component_lut_based_tags && has_three_component_matrix_based_tags && connection_space() != ColorSpace::PCSXYZ)
return Error::from_string_literal("ICC::Profile: DisplayDevice three-component matrix-based profile must use PCSXYZ");
break;
}
case DeviceClass::OutputDevice: {
// ICC v4, 8.5 Output profiles
// "8.5.1 General
// Output profiles are used to support devices such as printers and film recorders. The types of profiles available
// for use as Output profiles are N-component LUT-based and Monochrome.
// 8.5.2 N-component LUT-based Output profiles
// In addition to the tags listed in 8.2 an N-component LUT-based Output profile shall contain the following tags:
// - AToB0Tag (see 9.2.1);
// - AToB1Tag (see 9.2.2);
// - AToB2Tag (see 9.2.3);
// - BToA0Tag (see 9.2.6);
// - BToA1Tag (see 9.2.7);
// - BToA2Tag (see 9.2.8);
// - gamutTag (see 9.2.28);
// - colorantTableTag (see 9.2.18), for the xCLR colour spaces (see 7.2.6)
// 8.5.3 Monochrome Output profiles
// In addition to the tags listed in 8.2 a monochrome Output profile shall contain the following tag:
// - grayTRCTag (see 9.2.29)."
// The colorantTableTag requirement is new in v4.
Vector<TagSignature, 8> required_n_component_lut_based_tags = { AToB0Tag, AToB1Tag, AToB2Tag, BToA0Tag, BToA1Tag, BToA2Tag, gamutTag };
if (is_v4() && is_xCLR(connection_space()))
required_n_component_lut_based_tags.append(colorantTableTag);
bool has_n_component_lut_based_tags = has_all_tags(required_n_component_lut_based_tags);
bool has_monochrome_tags = has_tag(grayTRCTag);
if (!has_n_component_lut_based_tags && !has_monochrome_tags)
return Error::from_string_literal("ICC::Profile: OutputDevice required tags are missing");
break;
}
case DeviceClass::DeviceLink: {
// ICC v4, 8.6 DeviceLink profile
// "A DeviceLink profile shall contain the following tags:
// - profileDescriptionTag (see 9.2.41);
// - copyrightTag (see 9.2.21);
// - profileSequenceDescTag (see 9.2.42);
// - AToB0Tag (see 9.2.1);
// - colorantTableTag (see 9.2.18) which is required only if the data colour space field is xCLR, where x is
// hexadecimal 2 to F (see 7.2.6);
// - colorantTableOutTag (see 9.2.19), required only if the PCS field is xCLR, where x is hexadecimal 2 to F
// (see 7.2.6)"
// profileDescriptionTag and copyrightTag are already checked above, in the code for section 8.2.
Vector<TagSignature, 4> required_tags = { profileSequenceDescTag, AToB0Tag };
if (is_v4() && is_xCLR(connection_space())) { // This requirement is new in v4.
required_tags.append(colorantTableTag);
required_tags.append(colorantTableOutTag);
}
if (!has_all_tags(required_tags))
return Error::from_string_literal("ICC::Profile: DeviceLink required tags are missing");
// "The data colour space field (see 7.2.6) in the DeviceLink profile will be the same as the data colour space field
// of the first profile in the sequence used to construct the device link. The PCS field (see 7.2.7) will be the same
// as the data colour space field of the last profile in the sequence."
// FIXME: Check that if profileSequenceDescType parsing is implemented.
break;
}
case DeviceClass::ColorSpace:
// ICC v4, 8.7 ColorSpace profile
// "In addition to the tags listed in 8.2, a ColorSpace profile shall contain the following tags:
// - BToA0Tag (see 9.2.6);
// - AToB0Tag (see 9.2.1).
// [...] ColorSpace profiles may be embedded in images."
if (!has_all_tags(Array { AToB0Tag, BToA0Tag }))
return Error::from_string_literal("ICC::Profile: ColorSpace required tags are missing");
break;
case DeviceClass::Abstract:
// ICC v4, 8.8 Abstract profile
// "In addition to the tags listed in 8.2, an Abstract profile shall contain the following tag:
// - AToB0Tag (see 9.2.1).
// [...] Abstract profiles cannot be embedded in images."
if (!has_tag(AToB0Tag))
return Error::from_string_literal("ICC::Profile: Abstract required AToB0Tag is missing");
break;
case DeviceClass::NamedColor:
// ICC v4, 8.9 NamedColor profile
// "In addition to the tags listed in 8.2, a NamedColor profile shall contain the following tag:
// - namedColor2Tag (see 9.2.35)."
if (!has_tag(namedColor2Tag))
return Error::from_string_literal("ICC::Profile: NamedColor required namedColor2Tag is missing");
break;
}
return {};
}
ErrorOr<void> Profile::check_tag_types()
{
// This uses m_tag_table.get() even for tags that are guaranteed to exist after check_required_tags()
// so that the two functions can be called in either order.
// Profile ID of /System/Library/ColorSync/Profiles/ITU-2020.icc on macOS 13.1.
static constexpr Crypto::Hash::MD5::DigestType apple_itu_2020_id = { 0x57, 0x0b, 0x1b, 0x76, 0xc6, 0xa0, 0x50, 0xaa, 0x9f, 0x6c, 0x53, 0x8d, 0xbe, 0x2d, 0x3e, 0xf0 };
auto has_type = [&](auto tag, std::initializer_list<TagTypeSignature> types, std::initializer_list<TagTypeSignature> v4_types) {
if (auto type = m_tag_table.get(tag); type.has_value()) {
auto type_matches = [&](auto wanted_type) { return type.value()->type() == wanted_type; };
return any_of(types, type_matches) || (is_v4() && any_of(v4_types, type_matches));
}
return true;
};
// ICC v4, 9.2.1 AToB0Tag
// "Permitted tag types: lut8Type or lut16Type or lutAToBType"
// ICC v2, 6.4.1 AToB0Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(AToB0Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutAToBTagData::Type }))
return Error::from_string_literal("ICC::Profile: AToB0Tag has unexpected type");
// ICC v4, 9.2.2 AToB1Tag
// "Permitted tag types: lut8Type or lut16Type or lutAToBType"
// ICC v2, 6.4.2 AToB1Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(AToB1Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutAToBTagData::Type }))
return Error::from_string_literal("ICC::Profile: AToB1Tag has unexpected type");
// ICC v4, 9.2.3 AToB2Tag
// "Permitted tag types: lut8Type or lut16Type or lutAToBType"
// ICC v2, 6.4.3 AToB2Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(AToB2Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutAToBTagData::Type }))
return Error::from_string_literal("ICC::Profile: AToB2Tag has unexpected type");
// ICC v4, 9.2.4 blueMatrixColumnTag
// "Permitted tag types: XYZType
// This tag contains the third column in the matrix used in matrix/TRC transforms."
// (Called blueColorantTag in the v2 spec, otherwise identical there.)
if (auto type = m_tag_table.get(blueMatrixColumnTag); type.has_value()) {
if (type.value()->type() != XYZTagData::Type)
return Error::from_string_literal("ICC::Profile: blueMatrixColumnTag has unexpected type");
if (static_cast<XYZTagData const&>(*type.value()).xyzs().size() != 1)
return Error::from_string_literal("ICC::Profile: blueMatrixColumnTag has unexpected size");
}
// ICC v4, 9.2.5 blueTRCTag
// "Permitted tag types: curveType or parametricCurveType"
// ICC v2, 6.4.5 blueTRCTag
// "Tag Type: curveType"
if (!has_type(blueTRCTag, { CurveTagData::Type }, { ParametricCurveTagData::Type }))
return Error::from_string_literal("ICC::Profile: blueTRCTag has unexpected type");
// ICC v4, 9.2.6 BToA0Tag
// "Permitted tag types: lut8Type or lut16Type or lutBToAType"
// ICC v2, 6.4.6 BToA0Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(BToA0Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutBToATagData::Type }))
return Error::from_string_literal("ICC::Profile: BToA0Tag has unexpected type");
// ICC v4, 9.2.7 BToA1Tag
// "Permitted tag types: lut8Type or lut16Type or lutBToAType"
// ICC v2, 6.4.7 BToA1Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(BToA1Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutBToATagData::Type }))
return Error::from_string_literal("ICC::Profile: BToA1Tag has unexpected type");
// ICC v4, 9.2.8 BToA2Tag
// "Permitted tag types: lut8Type or lut16Type or lutBToAType"
// ICC v2, 6.4.8 BToA2Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(BToA2Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutBToATagData::Type }))
return Error::from_string_literal("ICC::Profile: BToA2Tag has unexpected type");
// ICC v4, 9.2.9 BToD0Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.10 BToD1Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.11 BToD2Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.12 BToD3Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.13 calibrationDateTimeTag
// "Permitted tag types: dateTimeType"
// FIXME
// ICC v4, 9.2.14 charTargetTag
// "Permitted tag types: textType"
if (!has_type(charTargetTag, { TextTagData::Type }, {}))
return Error::from_string_literal("ICC::Profile: charTargetTag has unexpected type");
// ICC v4, 9.2.15 chromaticAdaptationTag
// "Permitted tag types: s15Fixed16ArrayType [...]
// Such a 3 x 3 chromatic adaptation matrix is organized as a 9-element array"
if (auto type = m_tag_table.get(chromaticAdaptationTag); type.has_value()) {
if (type.value()->type() != S15Fixed16ArrayTagData::Type)
return Error::from_string_literal("ICC::Profile: chromaticAdaptationTag has unexpected type");
if (static_cast<S15Fixed16ArrayTagData const&>(*type.value()).values().size() != 9)
return Error::from_string_literal("ICC::Profile: chromaticAdaptationTag has unexpected size");
}
// ICC v4, 9.2.16 chromaticityTag
// "Permitted tag types: chromaticityType"
// FIXME
// ICC v4, 9.2.17 cicpTag
// "Permitted tag types: cicpType"
// FIXME
// ICC v4, 9.2.18 colorantOrderTag
// "Permitted tag types: colorantOrderType"
// FIXME
// ICC v4, 9.2.19 colorantTableTag
// "Permitted tag types: colorantTableType"
// FIXME
// ICC v4, 9.2.20 colorantTableOutTag
// "Permitted tag types: colorantTableType"
// FIXME
// ICC v4, 9.2.21 colorimetricIntentImageStateTag
// "Permitted tag types: signatureType"
// FIXME
// ICC v4, 9.2.22 copyrightTag
// "Permitted tag types: multiLocalizedUnicodeType"
// ICC v2, 6.4.13 copyrightTag
// "Tag Type: textType"
if (auto type = m_tag_table.get(copyrightTag); type.has_value()) {
// The v4 spec requires multiLocalizedUnicodeType for this, but I'm aware of a single file
// that still uses the v2 'text' type here: /System/Library/ColorSync/Profiles/ITU-2020.icc on macOS 13.1.
// https://openradar.appspot.com/radar?id=5529765549178880
bool has_v2_cprt_type_in_v4_file_quirk = id() == apple_itu_2020_id;
if (is_v4() && type.value()->type() != MultiLocalizedUnicodeTagData::Type && (!has_v2_cprt_type_in_v4_file_quirk || type.value()->type() != TextTagData::Type))
return Error::from_string_literal("ICC::Profile: copyrightTag has unexpected v4 type");
if (is_v2() && type.value()->type() != TextTagData::Type)
return Error::from_string_literal("ICC::Profile: copyrightTag has unexpected v2 type");
}
// ICC v4, 9.2.23 deviceMfgDescTag
// "Permitted tag types: multiLocalizedUnicodeType"
// ICC v2, 6.4.15 deviceMfgDescTag
// "Tag Type: textDescriptionType"
if (auto type = m_tag_table.get(deviceMfgDescTag); type.has_value()) {
if (is_v4() && type.value()->type() != MultiLocalizedUnicodeTagData::Type)
return Error::from_string_literal("ICC::Profile: deviceMfgDescTag has unexpected v4 type");
if (is_v2() && type.value()->type() != TextDescriptionTagData::Type)
return Error::from_string_literal("ICC::Profile: deviceMfgDescTag has unexpected v2 type");
}
// ICC v4, 9.2.24 deviceModelDescTag
// "Permitted tag types: multiLocalizedUnicodeType"
// ICC v2, 6.4.16 deviceModelDescTag
// "Tag Type: textDescriptionType"
if (auto type = m_tag_table.get(deviceModelDescTag); type.has_value()) {
if (is_v4() && type.value()->type() != MultiLocalizedUnicodeTagData::Type)
return Error::from_string_literal("ICC::Profile: deviceModelDescTag has unexpected v4 type");
if (is_v2() && type.value()->type() != TextDescriptionTagData::Type)
return Error::from_string_literal("ICC::Profile: deviceModelDescTag has unexpected v2 type");
}
// ICC v4, 9.2.25 DToB0Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.26 DToB1Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.27 DToB2Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.28 DToB3Tag
// "Permitted tag types: multiProcessElementsType"
// FIXME
// ICC v4, 9.2.29 gamutTag
// "Permitted tag types: lut8Type or lut16Type or lutBToAType"
// ICC v2, 6.4.18 gamutTag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(gamutTag, { Lut8TagData::Type, Lut16TagData::Type }, { LutBToATagData::Type }))
return Error::from_string_literal("ICC::Profile: gamutTag has unexpected type");
// ICC v4, 9.2.30 grayTRCTag
// "Permitted tag types: curveType or parametricCurveType"
// ICC v2, 6.4.19 grayTRCTag
// "Tag Type: curveType"
if (!has_type(grayTRCTag, { CurveTagData::Type }, { ParametricCurveTagData::Type }))
return Error::from_string_literal("ICC::Profile: grayTRCTag has unexpected type");
// ICC v4, 9.2.31 greenMatrixColumnTag
// "Permitted tag types: XYZType
// This tag contains the second column in the matrix, which is used in matrix/TRC transforms."
// (Called greenColorantTag in the v2 spec, otherwise identical there.)
if (auto type = m_tag_table.get(greenMatrixColumnTag); type.has_value()) {
if (type.value()->type() != XYZTagData::Type)
return Error::from_string_literal("ICC::Profile: greenMatrixColumnTag has unexpected type");
if (static_cast<XYZTagData const&>(*type.value()).xyzs().size() != 1)
return Error::from_string_literal("ICC::Profile: greenMatrixColumnTag has unexpected size");
}
// ICC v4, 9.2.32 greenTRCTag
// "Permitted tag types: curveType or parametricCurveType"
// ICC v2, 6.4.21 greenTRCTag
// "Tag Type: curveType"
if (!has_type(greenTRCTag, { CurveTagData::Type }, { ParametricCurveTagData::Type }))
return Error::from_string_literal("ICC::Profile: greenTRCTag has unexpected type");
// ICC v4, 9.2.33 luminanceTag
// "Permitted tag types: XYZType"
// This tag contains the absolute luminance of emissive devices in candelas per square metre as described by the
// Y channel.
// NOTE The X and Z values are set to zero."
// ICC v2, 6.4.22 luminanceTag
// "Absolute luminance of emissive devices in candelas per square meter as described by the Y channel. The
// X and Z channels are ignored in all cases."
if (auto type = m_tag_table.get(luminanceTag); type.has_value()) {
if (type.value()->type() != XYZTagData::Type)
return Error::from_string_literal("ICC::Profile: luminanceTag has unexpected type");
auto& xyz_type = static_cast<XYZTagData const&>(*type.value());
if (xyz_type.xyzs().size() != 1)
return Error::from_string_literal("ICC::Profile: luminanceTag has unexpected size");
if (is_v4() && xyz_type.xyzs()[0].x != 0)
return Error::from_string_literal("ICC::Profile: luminanceTag.x unexpectedly not 0");
if (is_v4() && xyz_type.xyzs()[0].z != 0)
return Error::from_string_literal("ICC::Profile: luminanceTag.z unexpectedly not 0");
}
// ICC v4, 9.2.34 measurementTag
// "Permitted tag types: measurementType"
// FIXME
// ICC v4, 9.2.35 metadataTag
// "Permitted tag types: dictType"
// FIXME
// ICC v4, 9.2.36 mediaWhitePointTag
// "Permitted tag types: XYZType
// This tag, which is used for generating the ICC-absolute colorimetric intent, specifies the chromatically adapted
// nCIEXYZ tristimulus values of the media white point. When the measurement data used to create the profile
// were specified relative to an adopted white with a chromaticity different from that of the PCS adopted white, the
// media white point nCIEXYZ values shall be adapted to be relative to the PCS adopted white chromaticity using
// the chromaticAdaptationTag matrix, before recording in the tag. For capture devices, the media white point is
// the encoding maximum white for the capture encoding. For displays, the values specified shall be those of the
// PCS illuminant as defined in 7.2.16.
// See Clause 6 and Annex A for a more complete description of the use of the media white point."
// ICC v2, 6.4.25 mediaWhitePointTag
// "This tag specifies the media white point and is used for generating ICC-absolute colorimetric intent. See
// Annex A for a more complete description of its use."
if (auto type = m_tag_table.get(mediaWhitePointTag); type.has_value()) {
if (type.value()->type() != XYZTagData::Type)
return Error::from_string_literal("ICC::Profile: mediaWhitePointTag has unexpected type");
auto& xyz_type = static_cast<XYZTagData const&>(*type.value());
if (xyz_type.xyzs().size() != 1)
return Error::from_string_literal("ICC::Profile: mediaWhitePointTag has unexpected size");
// V4 requires "For displays, the values specified shall be those of the PCS illuminant".
// But in practice that's not always true. For example, on macOS 13.1, '/System/Library/ColorSync/Profiles/DCI(P3) RGB.icc'
// has these values in the header: 0000F6D6 00010000 0000D32D
// but these values in the tag: 0000F6D5 00010000 0000D32C
// These are close, but not equal.
// FIXME: File bug for these, and add id-based quirk instead.
// if (is_v4() && device_class() == DeviceClass::DisplayDevice && xyz_type.xyzs()[0] != pcs_illuminant())
// return Error::from_string_literal("ICC::Profile: mediaWhitePointTag for displays should be equal to PCS illuminant");
}
// ICC v4, 9.2.37 namedColor2Tag
// "Permitted tag types: namedColor2Type"
// FIXME
// ICC v4, 9.2.38 outputResponseTag
// "Permitted tag types: responseCurveSet16Type"
// FIXME
// ICC v4, 9.2.39 perceptualRenderingIntentGamutTag
// "Permitted tag types: signatureType"
// FIXME
// ICC v4, 9.2.40 preview0Tag
// "Permitted tag types: lut8Type or lut16Type or lutAToBType or lutBToAType"
// ICC v2, 6.4.29 preview0Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(preview0Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutBToATagData::Type, LutBToATagData::Type }))
return Error::from_string_literal("ICC::Profile: preview0Tag has unexpected type");
// ICC v4, 9.2.41 preview1Tag
// "Permitted tag types: lut8Type or lut16Type or lutBToAType"
// ICC v2, 6.4.30 preview1Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(preview1Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutBToATagData::Type }))
return Error::from_string_literal("ICC::Profile: preview1Tag has unexpected type");
// ICC v4, 9.2.42 preview2Tag
// "Permitted tag types: lut8Type or lut16Type or lutBToAType"
// ICC v2, 6.4.31 preview2Tag
// "Tag Type: lut8Type or lut16Type"
if (!has_type(preview2Tag, { Lut8TagData::Type, Lut16TagData::Type }, { LutBToATagData::Type }))
return Error::from_string_literal("ICC::Profile: preview2Tag has unexpected type");
// ICC v4, 9.2.43 profileDescriptionTag
// "Permitted tag types: multiLocalizedUnicodeType"
// ICC v2, 6.4.32 profileDescriptionTag
// "Tag Type: textDescriptionType"
if (auto type = m_tag_table.get(profileDescriptionTag); type.has_value()) {
// The v4 spec requires multiLocalizedUnicodeType for this, but I'm aware of a single file
// that still uses the v2 'desc' type here: /System/Library/ColorSync/Profiles/ITU-2020.icc on macOS 13.1.
// https://openradar.appspot.com/radar?id=5529765549178880
bool has_v2_desc_type_in_v4_file_quirk = id() == apple_itu_2020_id;
if (is_v4() && type.value()->type() != MultiLocalizedUnicodeTagData::Type && (!has_v2_desc_type_in_v4_file_quirk || type.value()->type() != TextDescriptionTagData::Type))
return Error::from_string_literal("ICC::Profile: profileDescriptionTag has unexpected v4 type");
if (is_v2() && type.value()->type() != TextDescriptionTagData::Type)
return Error::from_string_literal("ICC::Profile: profileDescriptionTag has unexpected v2 type");
}
// ICC v4, 9.2.44 profileSequenceDescTag
// "Permitted tag types: profileSequenceDescType"
// FIXME
// ICC v4, 9.2.45 profileSequenceIdentifierTag
// "Permitted tag types: profileSequenceIdentifierType"
// FIXME
// ICC v4, 9.2.46 redMatrixColumnTag
// "Permitted tag types: XYZType
// This tag contains the first column in the matrix, which is used in matrix/TRC transforms."
// (Called redColorantTag in the v2 spec, otherwise identical there.)
if (auto type = m_tag_table.get(redMatrixColumnTag); type.has_value()) {
if (type.value()->type() != XYZTagData::Type)
return Error::from_string_literal("ICC::Profile: redMatrixColumnTag has unexpected type");
if (static_cast<XYZTagData const&>(*type.value()).xyzs().size() != 1)
return Error::from_string_literal("ICC::Profile: redMatrixColumnTag has unexpected size");
}
// ICC v4, 9.2.47 redTRCTag
// "Permitted tag types: curveType or parametricCurveType"
// ICC v2, 6.4.41 redTRCTag
// "Tag Type: curveType"
if (!has_type(redTRCTag, { CurveTagData::Type }, { ParametricCurveTagData::Type }))
return Error::from_string_literal("ICC::Profile: redTRCTag has unexpected type");
// ICC v4, 9.2.48 saturationRenderingIntentGamutTag
// "Permitted tag types: signatureType"
// FIXME
// ICC v4, 9.2.49 technologyTag
// "Permitted tag types: signatureType"
// FIXME
// ICC v4, 9.2.50 viewingCondDescTag
// "Permitted tag types: multiLocalizedUnicodeType"
// ICC v2, 6.4.46 viewingCondDescTag
// "Tag Type: textDescriptionType"
if (auto type = m_tag_table.get(viewingCondDescTag); type.has_value()) {
if (is_v4() && type.value()->type() != MultiLocalizedUnicodeTagData::Type)
return Error::from_string_literal("ICC::Profile: viewingCondDescTag has unexpected v4 type");
if (is_v2() && type.value()->type() != TextDescriptionTagData::Type)
return Error::from_string_literal("ICC::Profile: viewingCondDescTag has unexpected v2 type");
}
// ICC v4, 9.2.51 viewingConditionsTag
// "Permitted tag types: viewingConditionsType"
// FIXME
return {};
}
ErrorOr<NonnullRefPtr<Profile>> Profile::try_load_from_externally_owned_memory(ReadonlyBytes bytes)
{
auto profile = adopt_ref(*new Profile());
TRY(profile->read_header(bytes));
bytes = bytes.trim(profile->on_disk_size());
TRY(profile->read_tag_table(bytes));
TRY(profile->check_required_tags());
TRY(profile->check_tag_types());
return profile;
}
Crypto::Hash::MD5::DigestType Profile::compute_id(ReadonlyBytes bytes)
{
// ICC v4, 7.2.18 Profile ID field
// "The Profile ID shall be calculated using the MD5 fingerprinting method as defined in Internet RFC 1321.
// The entire profile, whose length is given by the size field in the header, with the
// profile flags field (bytes 44 to 47, see 7.2.11),
// rendering intent field (bytes 64 to 67, see 7.2.15),
// and profile ID field (bytes 84 to 99)
// in the profile header temporarily set to zeros (00h),
// shall be used to calculate the ID."
const u8 zero[16] = {};
Crypto::Hash::MD5 md5;
md5.update(bytes.slice(0, 44));
md5.update(ReadonlyBytes { zero, 4 }); // profile flags field
md5.update(bytes.slice(48, 64 - 48));
md5.update(ReadonlyBytes { zero, 4 }); // rendering intent field
md5.update(bytes.slice(68, 84 - 68));
md5.update(ReadonlyBytes { zero, 16 }); // profile ID field
md5.update(bytes.slice(100));
return md5.digest();
}
}
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