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LibGfx+icc: Add ICCProfile support for parametricCurveType and print it

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With this, we can parse all types required in v4
"Three-component matrix-based Input profiles".
This commit is contained in:
Nico Weber 2023-01-23 13:55:57 -05:00 • committed by Linus Groh
parent 67f718aa3f
commit fa00d94e82
3 changed files with 172 additions and 2 deletions
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54
Userland/Libraries/LibGfx/ICCProfile.cpp
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@ -635,6 +635,58 @@ ErrorOr<NonnullRefPtr<MultiLocalizedUnicodeTagData>> MultiLocalizedUnicodeTagDat
return adopt_ref(*new MultiLocalizedUnicodeTagData(offset, size, move(records)));
}
unsigned ParametricCurveTagData::parameter_count(FunctionType function_type)
{
switch (function_type) {
case FunctionType::Type0:
return 1;
case FunctionType::Type1:
return 3;
case FunctionType::Type2:
return 4;
case FunctionType::Type3:
return 5;
case FunctionType::Type4:
return 7;
}
VERIFY_NOT_REACHED();
}
ErrorOr<NonnullRefPtr<ParametricCurveTagData>> ParametricCurveTagData::from_bytes(ReadonlyBytes bytes, u32 offset, u32 size)
{
// ICC v4, 10.18 parametricCurveType
VERIFY(tag_type(bytes) == Type);
TRY(check_reserved(bytes));
// "The parametricCurveType describes a one-dimensional curve by specifying one of a predefined set of functions
// using the parameters."
if (bytes.size() < 2 * sizeof(u32) + 2 * sizeof(u16))
return Error::from_string_literal("ICC::Profile: parametricCurveType has not enough data");
u16 raw_function_type = *bit_cast<BigEndian<u16> const*>(bytes.data() + 8);
u16 reserved = *bit_cast<BigEndian<u16> const*>(bytes.data() + 10);
if (reserved != 0)
return Error::from_string_literal("ICC::Profile: parametricCurveType reserved u16 after function type not 0");
if (raw_function_type > 4)
return Error::from_string_literal("ICC::Profile: parametricCurveType unknown function type");
FunctionType function_type = (FunctionType)raw_function_type;
unsigned count = parameter_count(function_type);
if (bytes.size() < 2 * sizeof(u32) + 2 * sizeof(u16) + count * sizeof(s15Fixed16Number))
return Error::from_string_literal("ICC::Profile: parametricCurveType has not enough data for parameters");
BigEndian<s15Fixed16Number> const* raw_parameters = bit_cast<BigEndian<s15Fixed16Number> const*>(bytes.data() + 12);
Array<S15Fixed16, 7> parameters;
parameters.fill(0);
for (unsigned i = 0; i < count; ++i)
parameters[i] = S15Fixed16::create_raw(raw_parameters[i]);
return adopt_ref(*new ParametricCurveTagData(offset, size, function_type, move(parameters)));
}
ErrorOr<NonnullRefPtr<S15Fixed16ArrayTagData>> S15Fixed16ArrayTagData::from_bytes(ReadonlyBytes bytes, u32 offset, u32 size)
{
// ICC v4, 10.22 s15Fixed16ArrayType
@ -897,6 +949,8 @@ ErrorOr<NonnullRefPtr<TagData>> Profile::read_tag(ReadonlyBytes bytes, Detail::T
return CurveTagData::from_bytes(tag_bytes, entry.offset_to_beginning_of_tag_data_element, entry.size_of_tag_data_element);
case MultiLocalizedUnicodeTagData::Type:
return MultiLocalizedUnicodeTagData::from_bytes(tag_bytes, entry.offset_to_beginning_of_tag_data_element, entry.size_of_tag_data_element);
case ParametricCurveTagData::Type:
return ParametricCurveTagData::from_bytes(tag_bytes, entry.offset_to_beginning_of_tag_data_element, entry.size_of_tag_data_element);
case S15Fixed16ArrayTagData::Type:
return S15Fixed16ArrayTagData::from_bytes(tag_bytes, entry.offset_to_beginning_of_tag_data_element, entry.size_of_tag_data_element);
case TextDescriptionTagData::Type: