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LibGfx: Validate ICC namedColor2Tag consistency

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This commit is contained in:
Nico Weber 2023-02-13 20:06:26 -05:00 • committed by Jelle Raaijmakers
parent 45e391dae9
commit 1c259b7a5a
1 changed files with 53 additions and 2 deletions
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55
Userland/Libraries/LibGfx/ICC/Profile.cpp
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@ -473,6 +473,53 @@ StringView data_color_space_name(ColorSpace color_space)
VERIFY_NOT_REACHED();
}
static int number_of_components_in_color_space(ColorSpace color_space)
{
switch (color_space) {
case ColorSpace::Gray:
return 1;
case ColorSpace::TwoColor:
return 2;
case ColorSpace::nCIEXYZ:
case ColorSpace::CIELAB:
case ColorSpace::CIELUV:
case ColorSpace::YCbCr:
case ColorSpace::CIEYxy:
case ColorSpace::RGB:
case ColorSpace::HSV:
case ColorSpace::HLS:
case ColorSpace::CMY:
case ColorSpace::ThreeColor:
return 3;
case ColorSpace::CMYK:
case ColorSpace::FourColor:
return 4;
case ColorSpace::FiveColor:
return 5;
case ColorSpace::SixColor:
return 6;
case ColorSpace::SevenColor:
return 7;
case ColorSpace::EightColor:
return 8;
case ColorSpace::NineColor:
return 9;
case ColorSpace::TenColor:
return 10;
case ColorSpace::ElevenColor:
return 11;
case ColorSpace::TwelveColor:
return 12;
case ColorSpace::ThirteenColor:
return 13;
case ColorSpace::FourteenColor:
return 14;
case ColorSpace::FifteenColor:
return 15;
}
VERIFY_NOT_REACHED();
}
StringView profile_connection_space_name(ColorSpace color_space)
{
switch (color_space) {
@ -1186,8 +1233,12 @@ ErrorOr<void> Profile::check_tag_types()
return Error::from_string_literal("ICC::Profile: namedColor2Tag has unexpected type");
// ICC v4, 10.17 namedColor2Type
// "The device representation corresponds to the header’s “data colour space” field.
// This representation should be consistent with the “number of device coordinates” field in the namedColor2Type."
// FIXME: check that
// This representation should be consistent with the “number of device coordinates” field in the namedColor2Type.
// If this field is 0, device coordinates are not provided."
if (int number_of_device_coordinates = static_cast<NamedColor2TagData const&>(*type.value()).number_of_device_coordinates();
number_of_device_coordinates != 0 && number_of_device_coordinates != number_of_components_in_color_space(data_color_space())) {
return Error::from_string_literal("ICC::Profile: namedColor2Tag number of device coordinates inconsistent with data color space");
}
}
// ICC v4, 9.2.38 outputResponseTag