Future development will need to evaluate pipelines with curves and
matrices. Such pipelines naturally operate on vec3, as matrices cannot
be operated one channel at a time. Make weston_color_curve_sample()
operate on arrays of vec3.
Its currently only caller, weston_color_curve_to_3x1D_LUT(), is modified
to employ a temporary array for the API impedance mismatch. This
workaround will be removed later as weston_color_curve_to_3x1D_LUT()
itself will be converted to operate on vec3 arrays.
weston_v3f_array_to_planar() documentation was generated with AI.
weston_color_curve_sample() is restructured a little bit, attempting to
make it simpler to read.
color-operations.h gets the #includes needed to make it self-standing.
Assisted-by: Github Copilot (Claude Sonnet 3.5)
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Some external API's (e.g. DRM/KMS) are not capable of dealing with
enumerated color curves. In such cases, we may need to create LUT's that
correspond to such curves and give them to such API's
So add function weston_color_curve_to_3x1D_LUT() to craft 3x1D LUT from
a color curve.
Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
