mirror of
https://github.com/RGBCube/serenity
synced 2025-07-27 00:37:45 +00:00
LibGfx: Start adding a class for handling ICC color profiles
For now, this checks the magic number and reads file version and device class.
This commit is contained in:
parent
19d3821354
commit
d8867f8077
3 changed files with 199 additions and 0 deletions
128
Userland/Libraries/LibGfx/ICCProfile.cpp
Normal file
128
Userland/Libraries/LibGfx/ICCProfile.cpp
Normal file
|
@ -0,0 +1,128 @@
|
|||
/*
|
||||
* Copyright (c) 2022, Nico Weber <thakis@chromium.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include <AK/Endian.h>
|
||||
#include <LibGfx/ICCProfile.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, 7.2 Profile header
|
||||
struct ICCHeader {
|
||||
BigEndian<u32> profile_size;
|
||||
BigEndian<u32> preferred_cmm_type;
|
||||
|
||||
u8 profile_version_major;
|
||||
u8 profile_version_minor_bugfix;
|
||||
BigEndian<u16> profile_version_zero;
|
||||
|
||||
BigEndian<u32> profile_device_class;
|
||||
BigEndian<u32> data_color_space;
|
||||
BigEndian<u32> pcs; // "Profile Connection Space"
|
||||
|
||||
BigEndian<u16> year;
|
||||
BigEndian<u16> month;
|
||||
BigEndian<u16> day;
|
||||
BigEndian<u16> hour;
|
||||
BigEndian<u16> minutes;
|
||||
BigEndian<u16> seconds;
|
||||
|
||||
BigEndian<u32> profile_file_signature;
|
||||
BigEndian<u32> primary_platform;
|
||||
|
||||
BigEndian<u32> profile_flags;
|
||||
BigEndian<u32> device_manufacturer;
|
||||
BigEndian<u32> device_model;
|
||||
BigEndian<u64> device_attributes;
|
||||
BigEndian<u32> rendering_intent;
|
||||
|
||||
BigEndian<i32> pcs_illuminant_x;
|
||||
BigEndian<i32> pcs_illuminant_y;
|
||||
BigEndian<i32> pcs_illuminant_z;
|
||||
|
||||
BigEndian<u32> profile_creator;
|
||||
|
||||
u8 profile_md5[16];
|
||||
u8 reserved[28];
|
||||
};
|
||||
static_assert(sizeof(ICCHeader) == 128);
|
||||
|
||||
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 (u32)DeviceClass::InputDevce:
|
||||
case (u32)DeviceClass::DisplayDevice:
|
||||
case (u32)DeviceClass::OutputDevice:
|
||||
case (u32)DeviceClass::DeviceLink:
|
||||
case (u32)DeviceClass::ColorSpace:
|
||||
case (u32)DeviceClass::Abstract:
|
||||
case (u32)DeviceClass::NamedColor:
|
||||
return DeviceClass { u32 { header.profile_device_class } };
|
||||
}
|
||||
return Error::from_string_literal("ICC::Profile: Invalid device class");
|
||||
}
|
||||
|
||||
ErrorOr<void> parse_file_signature(ICCHeader const& header)
|
||||
{
|
||||
// iCC v4, 7.2.9 Profile file signature field
|
||||
if (header.profile_file_signature != 0x61637370)
|
||||
return Error::from_string_literal("ICC::Profile: profile file signature not 'acsp'");
|
||||
return {};
|
||||
}
|
||||
}
|
||||
|
||||
char const* device_class_name(DeviceClass device_class)
|
||||
{
|
||||
switch (device_class) {
|
||||
case DeviceClass::InputDevce:
|
||||
return "InputDevce";
|
||||
case DeviceClass::DisplayDevice:
|
||||
return "DisplayDevice";
|
||||
case DeviceClass::OutputDevice:
|
||||
return "OutputDevice";
|
||||
case DeviceClass::DeviceLink:
|
||||
return "DeviceLink";
|
||||
case DeviceClass::ColorSpace:
|
||||
return "ColorSpace";
|
||||
case DeviceClass::Abstract:
|
||||
return "Abstract";
|
||||
case DeviceClass::NamedColor:
|
||||
return "NamedColor";
|
||||
default:
|
||||
return "(unknown device class)";
|
||||
}
|
||||
}
|
||||
|
||||
ErrorOr<NonnullRefPtr<Profile>> Profile::try_load_from_externally_owned_memory(ReadonlyBytes bytes)
|
||||
{
|
||||
auto profile = adopt_ref(*new Profile());
|
||||
|
||||
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));
|
||||
profile->m_version = TRY(parse_version(header));
|
||||
profile->m_device_class = TRY(parse_device_class(header));
|
||||
|
||||
return profile;
|
||||
}
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue