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LibGfx/ICC: Stop using VectorN::length() as the vector size

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VectorN::length() returns the vector length (aka the square root of the
dot product of the vector with itself), not the count of components.

This is seemingly both wrong and slow.
This commit is contained in:
Idan Horowitz 2024-02-17 19:12:25 +02:00 committed by Tim Flynn
parent 05f382fc6e
commit 5129c8b766
Notes: sideshowbarker 2024-07-16 23:59:28 +09:00 
Author: https://github.com/IdanHo
Commit: https://github.com/SerenityOS/serenity/commit/5129c8b766
Pull-request: https://github.com/SerenityOS/serenity/pull/23232
Reviewed-by: https://github.com/trflynn89 ✅
1 changed files with 2 additions and 2 deletions
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4
Userland/Libraries/LibGfx/ICC/TagTypes.h
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@ -1093,7 +1093,7 @@ inline ErrorOr<FloatVector3> Lut16TagData::evaluate(ColorSpace input_space, Colo
// Each output table entry is appropriately normalized to the range 0 to 65535. // Each output table entry is appropriately normalized to the range 0 to 65535.
// The outputTable is of size (OutputChannels x outputTableEntries x 2) bytes. // The outputTable is of size (OutputChannels x outputTableEntries x 2) bytes.
// When stored in this tag, the one-dimensional lookup tables are packed one after another" // When stored in this tag, the one-dimensional lookup tables are packed one after another"
for (u8 c = 0; c < output_color.length(); ++c) for (u8 c = 0; c < 3; ++c)
output_color[c] = lerp_1d(m_output_tables.span().slice(c * m_number_of_output_table_entries, m_number_of_output_table_entries), output_color[c]) / 65535.0f; output_color[c] = lerp_1d(m_output_tables.span().slice(c * m_number_of_output_table_entries, m_number_of_output_table_entries), output_color[c]) / 65535.0f;
if (connection_space == ColorSpace::PCSXYZ) { if (connection_space == ColorSpace::PCSXYZ) {
@ -1181,7 +1181,7 @@ inline ErrorOr<FloatVector3> Lut8TagData::evaluate(ColorSpace input_space, Color
// Each output table entry is appropriately normalized to the range 0 to 255. // Each output table entry is appropriately normalized to the range 0 to 255.
// The outputTable is of size (OutputChannels x 256) bytes. // The outputTable is of size (OutputChannels x 256) bytes.
// When stored in this tag, the one-dimensional lookup tables are packed one after another" // When stored in this tag, the one-dimensional lookup tables are packed one after another"
for (u8 c = 0; c < output_color.length(); ++c) for (u8 c = 0; c < 3; ++c)
output_color[c] = lerp_1d(m_output_tables.span().slice(c * 256, 256), output_color[c]) / 255.0f; output_color[c] = lerp_1d(m_output_tables.span().slice(c * 256, 256), output_color[c]) / 255.0f;
if (connection_space == ColorSpace::PCSXYZ) { if (connection_space == ColorSpace::PCSXYZ) {