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LibGfx: Implement serialization of ViewingConditionsTagData

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Nico Weber 2023-02-17 22:24:51 -05:00 • committed by Sam Atkins
parent 933002ae5a
commit 2504f2035c
1 changed files with 17 additions and 0 deletions
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17
Userland/Libraries/LibGfx/ICC/BinaryWriter.cpp
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@ -180,6 +180,21 @@ static ErrorOr<ByteBuffer> encode_text(TextTagData const& tag_data)
return bytes;
}
static ErrorOr<ByteBuffer> encode_viewing_conditions(ViewingConditionsTagData const& tag_data)
{
// ICC v4, 10.30 viewingConditionsType
auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + sizeof(ViewingConditionsHeader)));
*bit_cast<BigEndian<u32>*>(bytes.data()) = (u32)ViewingConditionsTagData::Type;
*bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
auto& header = *bit_cast<ViewingConditionsHeader*>(bytes.data() + 8);
header.unnormalized_ciexyz_values_for_illuminant = tag_data.unnormalized_ciexyz_values_for_illuminant();
header.unnormalized_ciexyz_values_for_surround = tag_data.unnormalized_ciexyz_values_for_surround();
header.illuminant_type = tag_data.illuminant_type();
return bytes;
}
static ErrorOr<ByteBuffer> encode_xyz(XYZTagData const& tag_data)
{
// ICC v4, 10.31 XYZType
@ -215,6 +230,8 @@ static ErrorOr<ByteBuffer> encode_tag_data(TagData const& tag_data)
return encode_signature(static_cast<SignatureTagData const&>(tag_data));
case TextTagData::Type:
return encode_text(static_cast<TextTagData const&>(tag_data));
case ViewingConditionsTagData::Type:
return encode_viewing_conditions(static_cast<ViewingConditionsTagData const&>(tag_data));
case XYZTagData::Type:
return encode_xyz(static_cast<XYZTagData const&>(tag_data));
}