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ladybird/Userland/Utilities/icc.cpp
Nico Weber 0160f737e2 LibGfx/ICC+icc: Be lenient about invalid profile creation datetimes 
Before, we used to reject profiles where the creation datetime was
invalid per spec. But invalid dates happen in practice (most commonly,
all fields set to 0). They don't affect profile conversion at all,
so be lenient about this, in exchange for slightly more wordy code
in the places that want to show the creation datetime.

Fixes a crash rendering page 2 of
https://fredrikbk.com/publications/copy-and-patch.pdf
2024-02-21 13:37:08 +01:00

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/*
* Copyright (c) 2022-2023, Nico Weber <thakis@chromium.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Random.h>
#include <AK/String.h>
#include <AK/StringView.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DateTime.h>
#include <LibCore/File.h>
#include <LibCore/MappedFile.h>
#include <LibGfx/DeltaE.h>
#include <LibGfx/ICC/BinaryWriter.h>
#include <LibGfx/ICC/Profile.h>
#include <LibGfx/ICC/Tags.h>
#include <LibGfx/ICC/WellKnownProfiles.h>
#include <LibGfx/ImageFormats/ImageDecoder.h>
#include <LibVideo/Color/CodingIndependentCodePoints.h>
template<class T>
static ErrorOr<String> hyperlink(URL const& target, T const& label)
{
return String::formatted("\033]8;;{}\033\\{}\033]8;;\033\\", target, label);
}
template<class T>
static void out_optional(char const* label, Optional<T> const& optional)
{
out("{}: ", label);
if (optional.has_value())
outln("{}", *optional);
else
outln("(not set)");
}
static void out_curve(Gfx::ICC::CurveTagData const& curve, int indent_amount)
{
if (curve.values().is_empty()) {
outln("{: >{}}identity curve", "", indent_amount);
} else if (curve.values().size() == 1) {
outln("{: >{}}gamma: {}", "", indent_amount, FixedPoint<8, u16>::create_raw(curve.values()[0]));
} else {
// FIXME: Maybe print the actual points if -v is passed?
outln("{: >{}}curve with {} points", "", indent_amount, curve.values().size());
}
}
static void out_parametric_curve(Gfx::ICC::ParametricCurveTagData const& parametric_curve, int indent_amount)
{
switch (parametric_curve.function_type()) {
case Gfx::ICC::ParametricCurveTagData::FunctionType::Type0:
outln("{: >{}}Y = X**{}", "", indent_amount, parametric_curve.g());
break;
case Gfx::ICC::ParametricCurveTagData::FunctionType::Type1:
outln("{: >{}}Y = ({}*X + {})**{} if X >= -{}/{}", "", indent_amount,
parametric_curve.a(), parametric_curve.b(), parametric_curve.g(), parametric_curve.b(), parametric_curve.a());
outln("{: >{}}Y = 0 else", "", indent_amount);
break;
case Gfx::ICC::ParametricCurveTagData::FunctionType::Type2:
outln("{: >{}}Y = ({}*X + {})**{} + {} if X >= -{}/{}", "", indent_amount,
parametric_curve.a(), parametric_curve.b(), parametric_curve.g(), parametric_curve.c(), parametric_curve.b(), parametric_curve.a());
outln("{: >{}}Y = {} else", "", indent_amount, parametric_curve.c());
break;
case Gfx::ICC::ParametricCurveTagData::FunctionType::Type3:
outln("{: >{}}Y = ({}*X + {})**{} if X >= {}", "", indent_amount,
parametric_curve.a(), parametric_curve.b(), parametric_curve.g(), parametric_curve.d());
outln("{: >{}}Y = {}*X else", "", indent_amount, parametric_curve.c());
break;
case Gfx::ICC::ParametricCurveTagData::FunctionType::Type4:
outln("{: >{}}Y = ({}*X + {})**{} + {} if X >= {}", "", indent_amount,
parametric_curve.a(), parametric_curve.b(), parametric_curve.g(), parametric_curve.e(), parametric_curve.d());
outln("{: >{}}Y = {}*X + {} else", "", indent_amount, parametric_curve.c(), parametric_curve.f());
break;
}
}
static float curve_distance_u8(Gfx::ICC::TagData const& tag1, Gfx::ICC::TagData const& tag2)
{
VERIFY(tag1.type() == Gfx::ICC::CurveTagData::Type || tag1.type() == Gfx::ICC::ParametricCurveTagData::Type);
VERIFY(tag2.type() == Gfx::ICC::CurveTagData::Type || tag2.type() == Gfx::ICC::ParametricCurveTagData::Type);
float curve1_data[256];
if (tag1.type() == Gfx::ICC::CurveTagData::Type) {
auto& curve1 = static_cast<Gfx::ICC::CurveTagData const&>(tag1);
for (int i = 0; i < 256; ++i)
curve1_data[i] = curve1.evaluate(i / 255.f);
} else {
auto& parametric_curve1 = static_cast<Gfx::ICC::ParametricCurveTagData const&>(tag1);
for (int i = 0; i < 256; ++i)
curve1_data[i] = parametric_curve1.evaluate(i / 255.f);
}
float curve2_data[256];
if (tag2.type() == Gfx::ICC::CurveTagData::Type) {
auto& curve2 = static_cast<Gfx::ICC::CurveTagData const&>(tag2);
for (int i = 0; i < 256; ++i)
curve2_data[i] = curve2.evaluate(i / 255.f);
} else {
auto& parametric_curve2 = static_cast<Gfx::ICC::ParametricCurveTagData const&>(tag2);
for (int i = 0; i < 256; ++i)
curve2_data[i] = parametric_curve2.evaluate(i / 255.f);
}
float distance = 0;
for (int i = 0; i < 256; ++i)
distance += fabsf(curve1_data[i] - curve2_data[i]);
return distance;
}
static ErrorOr<void> out_curve_tag(Gfx::ICC::TagData const& tag, int indent_amount)
{
VERIFY(tag.type() == Gfx::ICC::CurveTagData::Type || tag.type() == Gfx::ICC::ParametricCurveTagData::Type);
if (tag.type() == Gfx::ICC::CurveTagData::Type)
out_curve(static_cast<Gfx::ICC::CurveTagData const&>(tag), indent_amount);
if (tag.type() == Gfx::ICC::ParametricCurveTagData::Type)
out_parametric_curve(static_cast<Gfx::ICC::ParametricCurveTagData const&>(tag), indent_amount);
auto sRGB_curve = TRY(Gfx::ICC::sRGB_curve());
// Some example values (for abs distance summed over the 256 values of an u8):
// In Compact-ICC-Profiles/profiles:
// AdobeCompat-v2.icc: 1.14 (this is a gamma 2.2 curve, so not really sRGB but close)
// AdobeCompat-v4.icc: 1.13
// AppleCompat-v2.icc: 11.94 (gamma 1.8 curve)
// DCI-P3-v4.icc: 8.29 (gamma 2.6 curve)
// DisplayP3-v2-magic.icc: 0.000912 (looks sRGB-ish)
// DisplayP3-v2-micro.icc: 0.010819
// DisplayP3-v4.icc: 0.001062 (yes, definitely sRGB)
// Rec2020-g24-v4.icc: 4.119216 (gamma 2.4 curve)
// Rec2020-v4.icc: 7.805417 (custom non-sRGB curve)
// Rec709-v4.icc: 7.783267 (same custom non-sRGB curve as Rec2020)
// sRGB-v2-magic.icc: 0.000912
// sRGB-v2-micro.icc: 0.010819
// sRGB-v2-nano.icc: 0.052516
// sRGB-v4.icc: 0.001062
// scRGB-v2.icc: 48.379859 (linear identity curve)
// Google sRGB IEC61966-2.1 (from a Pixel jpeg, parametric): 0
// Google sRGB IEC61966-2.1 (from a Pixel jpeg, LUT curve): 0.00096
// Apple 2015 Display P3 (from iPhone 7, parametric): 0.011427 (has the old, left intersection for switching from linear to exponent)
// HP sRGB: 0.00096
// color.org sRGB2014.icc: 0.00096
// color.org sRGB_ICC_v4_Appearance.icc, AToB1Tag, a curves: 0.441926 -- but this is not _really_ sRGB
// color.org sRGB_v4_ICC_preference.icc, AToB1Tag, a curves: 2.205453 -- not really sRGB either
// So `< 0.06` identifies sRGB in practice (for u8 values).
float u8_distance_to_sRGB = curve_distance_u8(*sRGB_curve, tag);
if (u8_distance_to_sRGB < 0.06f)
outln("{: >{}}Looks like sRGB's curve (distance {})", "", indent_amount, u8_distance_to_sRGB);
else
outln("{: >{}}Does not look like sRGB's curve (distance: {})", "", indent_amount, u8_distance_to_sRGB);
return {};
}
static ErrorOr<void> out_curves(Vector<Gfx::ICC::LutCurveType> const& curves)
{
for (auto const& curve : curves) {
VERIFY(curve->type() == Gfx::ICC::CurveTagData::Type || curve->type() == Gfx::ICC::ParametricCurveTagData::Type);
outln(" type {}, relative offset {}, size {}", curve->type(), curve->offset(), curve->size());
TRY(out_curve_tag(*curve, /*indent=*/12));
}
return {};
}
static ErrorOr<void> perform_debug_roundtrip(Gfx::ICC::Profile const& profile)
{
size_t num_channels = Gfx::ICC::number_of_components_in_color_space(profile.data_color_space());
Vector<u8, 4> input, output;
input.resize(num_channels);
output.resize(num_channels);
size_t const num_total_roundtrips = 500;
size_t num_lossless_roundtrips = 0;
for (size_t i = 0; i < num_total_roundtrips; ++i) {
for (size_t j = 0; j < num_channels; ++j)
input[j] = get_random<u8>();
auto color_in_profile_connection_space = TRY(profile.to_pcs(input));
TRY(profile.from_pcs(profile, color_in_profile_connection_space, output));
if (input != output) {
outln("roundtrip failed for {} -> {}", input, output);
} else {
++num_lossless_roundtrips;
}
}
outln("lossless roundtrips: {} / {}", num_lossless_roundtrips, num_total_roundtrips);
return {};
}
static ErrorOr<void> print_profile_measurement(Gfx::ICC::Profile const& profile)
{
auto lab_from_rgb = [&profile](u8 r, u8 g, u8 b) {
u8 rgb[3] = { r, g, b };
return profile.to_lab(rgb);
};
float largest = -1, smallest = 1000;
Color largest_color1, largest_color2, smallest_color1, smallest_color2;
for (u8 r = 0; r < 254; ++r) {
out("\r{}/254", r + 1);
fflush(stdout);
for (u8 g = 0; g < 254; ++g) {
for (u8 b = 0; b < 254; ++b) {
auto lab = TRY(lab_from_rgb(r, g, b));
u8 delta_r[] = { 1, 0, 0 };
u8 delta_g[] = { 0, 1, 0 };
u8 delta_b[] = { 0, 0, 1 };
for (unsigned i = 0; i < sizeof(delta_r); ++i) {
auto lab2 = TRY(lab_from_rgb(r + delta_r[i], g + delta_g[i], b + delta_b[i]));
float delta = Gfx::DeltaE(lab, lab2);
if (delta > largest) {
largest = delta;
largest_color1 = Color(r, g, b);
largest_color2 = Color(r + delta_r[i], g + delta_g[i], b + delta_b[i]);
}
if (delta < smallest) {
smallest = delta;
smallest_color1 = Color(r, g, b);
smallest_color2 = Color(r + delta_r[i], g + delta_g[i], b + delta_b[i]);
}
}
}
}
}
outln("\rlargest difference between neighboring colors: {}, between {} and {}", largest, largest_color1, largest_color2);
outln("smallest difference between neighboring colors: {}, between {} and {}", smallest, smallest_color1, smallest_color2);
return {};
}
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
Core::ArgsParser args_parser;
StringView path;
args_parser.add_positional_argument(path, "Path to ICC profile or to image containing ICC profile", "FILE", Core::ArgsParser::Required::No);
StringView name;
args_parser.add_option(name, "Name of a built-in profile, such as 'sRGB'", "name", 'n', "NAME");
StringView dump_out_path;
args_parser.add_option(dump_out_path, "Dump unmodified ICC profile bytes to this path", "dump-to", 0, "FILE");
StringView reencode_out_path;
args_parser.add_option(reencode_out_path, "Reencode ICC profile to this path", "reencode-to", 0, "FILE");
bool debug_roundtrip = false;
args_parser.add_option(debug_roundtrip, "Check how many u8 colors roundtrip losslessly through the profile. For debugging.", "debug-roundtrip", 0);
bool measure = false;
args_parser.add_option(measure, "For RGB ICC profiles, print perceptually smallest and largest color step", "measure", 0);
bool force_print = false;
args_parser.add_option(force_print, "Print profile even when writing ICC files", "print", 0);
args_parser.parse(arguments);
if (path.is_empty() && name.is_empty()) {
warnln("need either a path or a profile name");
return 1;
}
if (!path.is_empty() && !name.is_empty()) {
warnln("can't have both a path and a profile name");
return 1;
}
if (path.is_empty() && !dump_out_path.is_empty()) {
warnln("--dump-to only valid with path, not with profile name; use --reencode-to instead");
return 1;
}
ReadonlyBytes icc_bytes;
NonnullRefPtr<Gfx::ICC::Profile> profile = TRY([&]() -> ErrorOr<NonnullRefPtr<Gfx::ICC::Profile>> {
if (!name.is_empty()) {
if (name == "sRGB")
return Gfx::ICC::sRGB();
return Error::from_string_literal("unknown profile name");
}
auto file = TRY(Core::MappedFile::map(path));
auto decoder = Gfx::ImageDecoder::try_create_for_raw_bytes(file->bytes());
if (decoder) {
if (auto embedded_icc_bytes = TRY(decoder->icc_data()); embedded_icc_bytes.has_value()) {
icc_bytes = *embedded_icc_bytes;
} else {
outln("image contains no embedded ICC profile");
exit(1);
}
} else {
icc_bytes = file->bytes();
}
if (!dump_out_path.is_empty()) {
auto output_stream = TRY(Core::File::open(dump_out_path, Core::File::OpenMode::Write));
TRY(output_stream->write_until_depleted(icc_bytes));
}
return Gfx::ICC::Profile::try_load_from_externally_owned_memory(icc_bytes);
}());
if (!reencode_out_path.is_empty()) {
auto reencoded_bytes = TRY(Gfx::ICC::encode(profile));
auto output_stream = TRY(Core::File::open(reencode_out_path, Core::File::OpenMode::Write));
TRY(output_stream->write_until_depleted(reencoded_bytes));
}
if (debug_roundtrip) {
TRY(perform_debug_roundtrip(*profile));
return 0;
}
if (measure) {
if (profile->data_color_space() != Gfx::ICC::ColorSpace::RGB) {
warnln("--measure only works for RGB ICC profiles");
return 1;
}
TRY(print_profile_measurement(*profile));
}
bool do_print = (dump_out_path.is_empty() && reencode_out_path.is_empty() && !measure) || force_print;
if (!do_print)
return 0;
outln(" size: {} bytes", profile->on_disk_size());
out_optional(" preferred CMM type", profile->preferred_cmm_type());
outln(" version: {}", profile->version());
outln(" device class: {}", Gfx::ICC::device_class_name(profile->device_class()));
outln(" data color space: {}", Gfx::ICC::data_color_space_name(profile->data_color_space()));
outln(" connection space: {}", Gfx::ICC::profile_connection_space_name(profile->connection_space()));
if (auto time = profile->creation_timestamp().to_time_t(); !time.is_error()) {
// Print in friendly localtime for valid profiles.
outln("creation date and time: {}", Core::DateTime::from_timestamp(time.release_value()));
} else {
outln("creation date and time: {:04}-{:02}-{:02} {:02}:{:02}:{:02} UTC (invalid)",
profile->creation_timestamp().year, profile->creation_timestamp().month, profile->creation_timestamp().day,
profile->creation_timestamp().hours, profile->creation_timestamp().minutes, profile->creation_timestamp().seconds);
}
out_optional(" primary platform", profile->primary_platform().map([](auto platform) { return primary_platform_name(platform); }));
auto flags = profile->flags();
outln(" flags: 0x{:08x}", flags.bits());
outln(" - {}embedded in file", flags.is_embedded_in_file() ? "" : "not ");
outln(" - can{} be used independently of embedded color data", flags.can_be_used_independently_of_embedded_color_data() ? "" : "not");
if (auto unknown_icc_bits = flags.icc_bits() & ~Gfx::ICC::Flags::KnownBitsMask)
outln(" other unknown ICC bits: 0x{:04x}", unknown_icc_bits);
if (auto color_management_module_bits = flags.color_management_module_bits())
outln(" CMM bits: 0x{:04x}", color_management_module_bits);
out_optional(" device manufacturer", TRY(profile->device_manufacturer().map([](auto device_manufacturer) {
return hyperlink(device_manufacturer_url(device_manufacturer), device_manufacturer);
})));
out_optional(" device model", TRY(profile->device_model().map([](auto device_model) {
return hyperlink(device_model_url(device_model), device_model);
})));
auto device_attributes = profile->device_attributes();
outln(" device attributes: 0x{:016x}", device_attributes.bits());
outln(" media is:");
outln(" - {}",
device_attributes.media_reflectivity() == Gfx::ICC::DeviceAttributes::MediaReflectivity::Reflective ? "reflective" : "transparent");
outln(" - {}",
device_attributes.media_glossiness() == Gfx::ICC::DeviceAttributes::MediaGlossiness::Glossy ? "glossy" : "matte");
outln(" - {}",
device_attributes.media_polarity() == Gfx::ICC::DeviceAttributes::MediaPolarity::Positive ? "of positive polarity" : "of negative polarity");
outln(" - {}",
device_attributes.media_color() == Gfx::ICC::DeviceAttributes::MediaColor::Colored ? "colored" : "black and white");
VERIFY((flags.icc_bits() & ~Gfx::ICC::DeviceAttributes::KnownBitsMask) == 0);
if (auto vendor_bits = device_attributes.vendor_bits())
outln(" vendor bits: 0x{:08x}", vendor_bits);
outln(" rendering intent: {}", Gfx::ICC::rendering_intent_name(profile->rendering_intent()));
outln(" pcs illuminant: {}", profile->pcs_illuminant());
out_optional(" creator", profile->creator());
out_optional(" id", profile->id());
size_t profile_disk_size = icc_bytes.size();
if (profile_disk_size != profile->on_disk_size()) {
VERIFY(profile_disk_size > profile->on_disk_size());
outln("{} trailing bytes after profile data", profile_disk_size - profile->on_disk_size());
}
outln("");
outln("tags:");
HashMap<Gfx::ICC::TagData*, Gfx::ICC::TagSignature> tag_data_to_first_signature;
TRY(profile->try_for_each_tag([&tag_data_to_first_signature](auto tag_signature, auto tag_data) -> ErrorOr<void> {
if (auto name = tag_signature_spec_name(tag_signature); name.has_value())
out("{} ({}): ", *name, tag_signature);
else
out("Unknown tag ({}): ", tag_signature);
outln("type {}, offset {}, size {}", tag_data->type(), tag_data->offset(), tag_data->size());
// Print tag data only the first time it's seen.
// (Different sigatures can refer to the same data.)
auto it = tag_data_to_first_signature.find(tag_data);
if (it != tag_data_to_first_signature.end()) {
outln(" (see {} above)", it->value);
return {};
}
tag_data_to_first_signature.set(tag_data, tag_signature);
if (tag_data->type() == Gfx::ICC::ChromaticityTagData::Type) {
auto& chromaticity = static_cast<Gfx::ICC::ChromaticityTagData&>(*tag_data);
outln(" phosphor or colorant type: {}", Gfx::ICC::ChromaticityTagData::phosphor_or_colorant_type_name(chromaticity.phosphor_or_colorant_type()));
for (auto const& xy : chromaticity.xy_coordinates())
outln(" x, y: {}, {}", xy.x, xy.y);
} else if (tag_data->type() == Gfx::ICC::CicpTagData::Type) {
auto& cicp = static_cast<Gfx::ICC::CicpTagData&>(*tag_data);
outln(" color primaries: {} - {}", cicp.color_primaries(),
Video::color_primaries_to_string((Video::ColorPrimaries)cicp.color_primaries()));
outln(" transfer characteristics: {} - {}", cicp.transfer_characteristics(),
Video::transfer_characteristics_to_string((Video::TransferCharacteristics)cicp.transfer_characteristics()));
outln(" matrix coefficients: {} - {}", cicp.matrix_coefficients(),
Video::matrix_coefficients_to_string((Video::MatrixCoefficients)cicp.matrix_coefficients()));
outln(" video full range flag: {} - {}", cicp.video_full_range_flag(),
Video::video_full_range_flag_to_string((Video::VideoFullRangeFlag)cicp.video_full_range_flag()));
} else if (tag_data->type() == Gfx::ICC::CurveTagData::Type) {
TRY(out_curve_tag(*tag_data, /*indent=*/4));
} else if (tag_data->type() == Gfx::ICC::Lut16TagData::Type) {
auto& lut16 = static_cast<Gfx::ICC::Lut16TagData&>(*tag_data);
outln(" input table: {} channels x {} entries", lut16.number_of_input_channels(), lut16.number_of_input_table_entries());
outln(" output table: {} channels x {} entries", lut16.number_of_output_channels(), lut16.number_of_output_table_entries());
outln(" color lookup table: {} grid points, {} total entries", lut16.number_of_clut_grid_points(), lut16.clut_values().size());
auto const& e = lut16.e_matrix();
outln(" e = [ {}, {}, {},", e[0], e[1], e[2]);
outln(" {}, {}, {},", e[3], e[4], e[5]);
outln(" {}, {}, {} ]", e[6], e[7], e[8]);
} else if (tag_data->type() == Gfx::ICC::Lut8TagData::Type) {
auto& lut8 = static_cast<Gfx::ICC::Lut8TagData&>(*tag_data);
outln(" input table: {} channels x {} entries", lut8.number_of_input_channels(), lut8.number_of_input_table_entries());
outln(" output table: {} channels x {} entries", lut8.number_of_output_channels(), lut8.number_of_output_table_entries());
outln(" color lookup table: {} grid points, {} total entries", lut8.number_of_clut_grid_points(), lut8.clut_values().size());
auto const& e = lut8.e_matrix();
outln(" e = [ {}, {}, {},", e[0], e[1], e[2]);
outln(" {}, {}, {},", e[3], e[4], e[5]);
outln(" {}, {}, {} ]", e[6], e[7], e[8]);
} else if (tag_data->type() == Gfx::ICC::LutAToBTagData::Type) {
auto& a_to_b = static_cast<Gfx::ICC::LutAToBTagData&>(*tag_data);
outln(" {} input channels, {} output channels", a_to_b.number_of_input_channels(), a_to_b.number_of_output_channels());
if (auto const& optional_a_curves = a_to_b.a_curves(); optional_a_curves.has_value()) {
outln(" a curves: {} curves", optional_a_curves->size());
TRY(out_curves(optional_a_curves.value()));
} else {
outln(" a curves: (not set)");
}
if (auto const& optional_clut = a_to_b.clut(); optional_clut.has_value()) {
auto const& clut = optional_clut.value();
outln(" color lookup table: {} grid points, {}",
TRY(String::join(" x "sv, clut.number_of_grid_points_in_dimension)),
TRY(clut.values.visit(
[](Vector<u8> const& v) { return String::formatted("{} u8 entries", v.size()); },
[](Vector<u16> const& v) { return String::formatted("{} u16 entries", v.size()); })));
} else {
outln(" color lookup table: (not set)");
}
if (auto const& optional_m_curves = a_to_b.m_curves(); optional_m_curves.has_value()) {
outln(" m curves: {} curves", optional_m_curves->size());
TRY(out_curves(optional_m_curves.value()));
} else {
outln(" m curves: (not set)");
}
if (auto const& optional_e = a_to_b.e_matrix(); optional_e.has_value()) {
auto const& e = optional_e.value();
outln(" e = [ {}, {}, {}, {},", e[0], e[1], e[2], e[9]);
outln(" {}, {}, {}, {},", e[3], e[4], e[5], e[10]);
outln(" {}, {}, {}, {} ]", e[6], e[7], e[8], e[11]);
} else {
outln(" e = (not set)");
}
outln(" b curves: {} curves", a_to_b.b_curves().size());
TRY(out_curves(a_to_b.b_curves()));
} else if (tag_data->type() == Gfx::ICC::LutBToATagData::Type) {
auto& b_to_a = static_cast<Gfx::ICC::LutBToATagData&>(*tag_data);
outln(" {} input channels, {} output channels", b_to_a.number_of_input_channels(), b_to_a.number_of_output_channels());
outln(" b curves: {} curves", b_to_a.b_curves().size());
TRY(out_curves(b_to_a.b_curves()));
if (auto const& optional_e = b_to_a.e_matrix(); optional_e.has_value()) {
auto const& e = optional_e.value();
outln(" e = [ {}, {}, {}, {},", e[0], e[1], e[2], e[9]);
outln(" {}, {}, {}, {},", e[3], e[4], e[5], e[10]);
outln(" {}, {}, {}, {} ]", e[6], e[7], e[8], e[11]);
} else {
outln(" e = (not set)");
}
if (auto const& optional_m_curves = b_to_a.m_curves(); optional_m_curves.has_value()) {
outln(" m curves: {} curves", optional_m_curves->size());
TRY(out_curves(optional_m_curves.value()));
} else {
outln(" m curves: (not set)");
}
if (auto const& optional_clut = b_to_a.clut(); optional_clut.has_value()) {
auto const& clut = optional_clut.value();
outln(" color lookup table: {} grid points, {}",
TRY(String::join(" x "sv, clut.number_of_grid_points_in_dimension)),
TRY(clut.values.visit(
[](Vector<u8> const& v) { return String::formatted("{} u8 entries", v.size()); },
[](Vector<u16> const& v) { return String::formatted("{} u16 entries", v.size()); })));
} else {
outln(" color lookup table: (not set)");
}
if (auto const& optional_a_curves = b_to_a.a_curves(); optional_a_curves.has_value()) {
outln(" a curves: {} curves", optional_a_curves->size());
TRY(out_curves(optional_a_curves.value()));
} else {
outln(" a curves: (not set)");
}
} else if (tag_data->type() == Gfx::ICC::MeasurementTagData::Type) {
auto& measurement = static_cast<Gfx::ICC::MeasurementTagData&>(*tag_data);
outln(" standard observer: {}", Gfx::ICC::MeasurementTagData::standard_observer_name(measurement.standard_observer()));
outln(" tristimulus value for measurement backing: {}", measurement.tristimulus_value_for_measurement_backing());
outln(" measurement geometry: {}", Gfx::ICC::MeasurementTagData::measurement_geometry_name(measurement.measurement_geometry()));
outln(" measurement flare: {} %", measurement.measurement_flare() * 100);
outln(" standard illuminant: {}", Gfx::ICC::MeasurementTagData::standard_illuminant_name(measurement.standard_illuminant()));
} else if (tag_data->type() == Gfx::ICC::MultiLocalizedUnicodeTagData::Type) {
auto& multi_localized_unicode = static_cast<Gfx::ICC::MultiLocalizedUnicodeTagData&>(*tag_data);
for (auto& record : multi_localized_unicode.records()) {
outln(" {:c}{:c}/{:c}{:c}: \"{}\"",
record.iso_639_1_language_code >> 8, record.iso_639_1_language_code & 0xff,
record.iso_3166_1_country_code >> 8, record.iso_3166_1_country_code & 0xff,
record.text);
}
} else if (tag_data->type() == Gfx::ICC::NamedColor2TagData::Type) {
auto& named_colors = static_cast<Gfx::ICC::NamedColor2TagData&>(*tag_data);
outln(" vendor specific flag: 0x{:08x}", named_colors.vendor_specific_flag());
outln(" common name prefix: \"{}\"", named_colors.prefix());
outln(" common name suffix: \"{}\"", named_colors.suffix());
outln(" {} colors:", named_colors.size());
for (size_t i = 0; i < min(named_colors.size(), 5u); ++i) {
const auto& pcs = named_colors.pcs_coordinates(i);
// FIXME: Display decoded values? (See ICC v4 6.3.4.2 and 10.8.)
out(" \"{}\", PCS coordinates: 0x{:04x} 0x{:04x} 0x{:04x}", TRY(named_colors.color_name(i)), pcs.xyz.x, pcs.xyz.y, pcs.xyz.z);
if (auto number_of_device_coordinates = named_colors.number_of_device_coordinates(); number_of_device_coordinates > 0) {
out(", device coordinates:");
for (size_t j = 0; j < number_of_device_coordinates; ++j)
out(" 0x{:04x}", named_colors.device_coordinates(i)[j]);
}
outln();
}
if (named_colors.size() > 5u)
outln(" ...");
} else if (tag_data->type() == Gfx::ICC::ParametricCurveTagData::Type) {
TRY(out_curve_tag(*tag_data, /*indent=*/4));
} else if (tag_data->type() == Gfx::ICC::S15Fixed16ArrayTagData::Type) {
// This tag can contain arbitrarily many fixed-point numbers, but in practice it's
// exclusively used for the 'chad' tag, where it always contains 9 values that
// represent a 3x3 matrix. So print the values in groups of 3.
auto& fixed_array = static_cast<Gfx::ICC::S15Fixed16ArrayTagData&>(*tag_data);
out(" [");
int i = 0;
for (auto value : fixed_array.values()) {
if (i > 0) {
out(",");
if (i % 3 == 0) {
outln();
out(" ");
}
}
out(" {}", value);
i++;
}
outln(" ]");
} else if (tag_data->type() == Gfx::ICC::SignatureTagData::Type) {
auto& signature = static_cast<Gfx::ICC::SignatureTagData&>(*tag_data);
if (auto name = signature.name_for_tag(tag_signature); name.has_value()) {
outln(" signature: {}", name.value());
} else {
outln(" signature: Unknown ('{:c}{:c}{:c}{:c}' / 0x{:08x})",
signature.signature() >> 24, (signature.signature() >> 16) & 0xff, (signature.signature() >> 8) & 0xff, signature.signature() & 0xff,
signature.signature());
}
} else if (tag_data->type() == Gfx::ICC::TextDescriptionTagData::Type) {
auto& text_description = static_cast<Gfx::ICC::TextDescriptionTagData&>(*tag_data);
outln(" ascii: \"{}\"", text_description.ascii_description());
out_optional(" unicode", TRY(text_description.unicode_description().map([](auto description) { return String::formatted("\"{}\"", description); })));
outln(" unicode language code: 0x{}", text_description.unicode_language_code());
out_optional(" macintosh", TRY(text_description.macintosh_description().map([](auto description) { return String::formatted("\"{}\"", description); })));
} else if (tag_data->type() == Gfx::ICC::TextTagData::Type) {
outln(" text: \"{}\"", static_cast<Gfx::ICC::TextTagData&>(*tag_data).text());
} else if (tag_data->type() == Gfx::ICC::ViewingConditionsTagData::Type) {
auto& viewing_conditions = static_cast<Gfx::ICC::ViewingConditionsTagData&>(*tag_data);
outln(" unnormalized CIEXYZ values for illuminant (in which Y is in cd/m²): {}", viewing_conditions.unnormalized_ciexyz_values_for_illuminant());
outln(" unnormalized CIEXYZ values for surround (in which Y is in cd/m²): {}", viewing_conditions.unnormalized_ciexyz_values_for_surround());
outln(" illuminant type: {}", Gfx::ICC::MeasurementTagData::standard_illuminant_name(viewing_conditions.illuminant_type()));
} else if (tag_data->type() == Gfx::ICC::XYZTagData::Type) {
for (auto& xyz : static_cast<Gfx::ICC::XYZTagData&>(*tag_data).xyzs())
outln(" {}", xyz);
}
return {};
}));
return 0;
}
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