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LibGfx: Implement serialization of Lut16TagData and Lut8TagData

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Nico Weber 2023-02-19 16:32:39 -05:00 • committed by Andreas Kling
parent 4bafdaba3f
commit 1d124af66f
Notes: sideshowbarker 2024-07-16 23:58:39 +09:00
1 changed files with 70 additions and 0 deletions
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70
Userland/Libraries/LibGfx/ICC/BinaryWriter.cpp
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@ -62,6 +62,72 @@ static ErrorOr<ByteBuffer> encode_curve(CurveTagData const& tag_data)
return bytes;
}
static ErrorOr<ByteBuffer> encode_lut_16(Lut16TagData const& tag_data)
{
// ICC v4, 10.10 lut16Type
u32 input_tables_size = tag_data.input_tables().size();
u32 clut_values_size = tag_data.clut_values().size();
u32 output_tables_size = tag_data.output_tables().size();
auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + sizeof(LUTHeader) + 2 * sizeof(u16) + sizeof(u16) * (input_tables_size + clut_values_size + output_tables_size)));
*bit_cast<BigEndian<u32>*>(bytes.data()) = static_cast<u32>(Lut16TagData::Type);
*bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
auto& header = *bit_cast<LUTHeader*>(bytes.data() + 8);
header.number_of_input_channels = tag_data.number_of_input_channels();
header.number_of_output_channels = tag_data.number_of_output_channels();
header.number_of_clut_grid_points = tag_data.number_of_clut_grid_points();
header.reserved_for_padding = 0;
for (int i = 0; i < 9; ++i)
header.e_parameters[i] = tag_data.e_matrix().e[i].raw();
*bit_cast<BigEndian<u16>*>(bytes.data() + 8 + sizeof(LUTHeader)) = tag_data.number_of_input_table_entries();
*bit_cast<BigEndian<u16>*>(bytes.data() + 8 + sizeof(LUTHeader) + 2) = tag_data.number_of_output_table_entries();
auto* values = bit_cast<BigEndian<u16>*>(bytes.data() + 8 + sizeof(LUTHeader) + 4);
for (u16 input_value : tag_data.input_tables())
*values++ = input_value;
for (u16 clut_value : tag_data.clut_values())
*values++ = clut_value;
for (u16 output_value : tag_data.output_tables())
*values++ = output_value;
return bytes;
}
static ErrorOr<ByteBuffer> encode_lut_8(Lut8TagData const& tag_data)
{
// ICC v4, 10.11 lut8Type
u32 input_tables_size = tag_data.input_tables().size();
u32 clut_values_size = tag_data.clut_values().size();
u32 output_tables_size = tag_data.output_tables().size();
auto bytes = TRY(ByteBuffer::create_uninitialized(2 * sizeof(u32) + sizeof(LUTHeader) + input_tables_size + clut_values_size + output_tables_size));
*bit_cast<BigEndian<u32>*>(bytes.data()) = static_cast<u32>(Lut8TagData::Type);
*bit_cast<BigEndian<u32>*>(bytes.data() + 4) = 0;
auto& header = *bit_cast<LUTHeader*>(bytes.data() + 8);
header.number_of_input_channels = tag_data.number_of_input_channels();
header.number_of_output_channels = tag_data.number_of_output_channels();
header.number_of_clut_grid_points = tag_data.number_of_clut_grid_points();
header.reserved_for_padding = 0;
for (int i = 0; i < 9; ++i)
header.e_parameters[i] = tag_data.e_matrix().e[i].raw();
u8* values = bytes.data() + 8 + sizeof(LUTHeader);
memcpy(values, tag_data.input_tables().data(), input_tables_size);
values += input_tables_size;
memcpy(values, tag_data.clut_values().data(), clut_values_size);
values += clut_values_size;
memcpy(values, tag_data.output_tables().data(), output_tables_size);
return bytes;
}
static ErrorOr<ByteBuffer> encode_measurement(MeasurementTagData const& tag_data)
{
// ICC v4, 10.14 measurementType
@ -310,6 +376,10 @@ static ErrorOr<ByteBuffer> encode_tag_data(TagData const& tag_data)
return encode_cipc(static_cast<CicpTagData const&>(tag_data));
case CurveTagData::Type:
return encode_curve(static_cast<CurveTagData const&>(tag_data));
case Lut16TagData::Type:
return encode_lut_16(static_cast<Lut16TagData const&>(tag_data));
case Lut8TagData::Type:
return encode_lut_8(static_cast<Lut8TagData const&>(tag_data));
case MeasurementTagData::Type:
return encode_measurement(static_cast<MeasurementTagData const&>(tag_data));
case MultiLocalizedUnicodeTagData::Type: