mirror of
https://github.com/RGBCube/serenity
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128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
/*
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* Copyright (c) 2022, Nico Weber <thakis@chromium.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Endian.h>
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#include <LibGfx/ICCProfile.h>
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// V2 spec: https://color.org/specification/ICC.1-2001-04.pdf
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// V4 spec: https://color.org/specification/ICC.1-2022-05.pdf
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namespace Gfx::ICC {
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namespace {
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// ICC V4, 7.2 Profile header
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struct ICCHeader {
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BigEndian<u32> profile_size;
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BigEndian<u32> preferred_cmm_type;
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u8 profile_version_major;
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u8 profile_version_minor_bugfix;
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BigEndian<u16> profile_version_zero;
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BigEndian<u32> profile_device_class;
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BigEndian<u32> data_color_space;
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BigEndian<u32> pcs; // "Profile Connection Space"
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BigEndian<u16> year;
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BigEndian<u16> month;
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BigEndian<u16> day;
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BigEndian<u16> hour;
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BigEndian<u16> minutes;
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BigEndian<u16> seconds;
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BigEndian<u32> profile_file_signature;
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BigEndian<u32> primary_platform;
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BigEndian<u32> profile_flags;
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BigEndian<u32> device_manufacturer;
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BigEndian<u32> device_model;
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BigEndian<u64> device_attributes;
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BigEndian<u32> rendering_intent;
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BigEndian<i32> pcs_illuminant_x;
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BigEndian<i32> pcs_illuminant_y;
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BigEndian<i32> pcs_illuminant_z;
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BigEndian<u32> profile_creator;
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u8 profile_md5[16];
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u8 reserved[28];
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};
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static_assert(sizeof(ICCHeader) == 128);
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ErrorOr<Version> parse_version(ICCHeader const& header)
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{
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// ICC v4, 7.2.4 Profile version field
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if (header.profile_version_zero != 0)
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return Error::from_string_literal("ICC::Profile: Reserved version bytes not zero");
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return Version(header.profile_version_major, header.profile_version_minor_bugfix);
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}
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ErrorOr<DeviceClass> parse_device_class(ICCHeader const& header)
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{
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// ICC v4, 7.2.5 Profile/device class field
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switch (header.profile_device_class) {
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case (u32)DeviceClass::InputDevce:
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case (u32)DeviceClass::DisplayDevice:
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case (u32)DeviceClass::OutputDevice:
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case (u32)DeviceClass::DeviceLink:
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case (u32)DeviceClass::ColorSpace:
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case (u32)DeviceClass::Abstract:
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case (u32)DeviceClass::NamedColor:
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return DeviceClass { u32 { header.profile_device_class } };
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}
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return Error::from_string_literal("ICC::Profile: Invalid device class");
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}
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ErrorOr<void> parse_file_signature(ICCHeader const& header)
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{
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// iCC v4, 7.2.9 Profile file signature field
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if (header.profile_file_signature != 0x61637370)
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return Error::from_string_literal("ICC::Profile: profile file signature not 'acsp'");
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return {};
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}
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}
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char const* device_class_name(DeviceClass device_class)
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{
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switch (device_class) {
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case DeviceClass::InputDevce:
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return "InputDevce";
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case DeviceClass::DisplayDevice:
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return "DisplayDevice";
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case DeviceClass::OutputDevice:
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return "OutputDevice";
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case DeviceClass::DeviceLink:
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return "DeviceLink";
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case DeviceClass::ColorSpace:
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return "ColorSpace";
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case DeviceClass::Abstract:
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return "Abstract";
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case DeviceClass::NamedColor:
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return "NamedColor";
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default:
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return "(unknown device class)";
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}
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}
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ErrorOr<NonnullRefPtr<Profile>> Profile::try_load_from_externally_owned_memory(ReadonlyBytes bytes)
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{
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auto profile = adopt_ref(*new Profile());
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if (bytes.size() < sizeof(ICCHeader))
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return Error::from_string_literal("ICC::Profile: Not enough data for header");
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auto header = *bit_cast<ICCHeader const*>(bytes.data());
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TRY(parse_file_signature(header));
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profile->m_version = TRY(parse_version(header));
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profile->m_device_class = TRY(parse_device_class(header));
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return profile;
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}
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}
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