A linear gradient fill (mirror of model::Gradient): ordered colour stops
(position 0..=1, RGB, opacity) plus the axis angle in degrees clockwise
from +X (0 = left→right, 90 = top→bottom — the DrawingML convention).
Carried alongside the flat RGB fill, which stays the first stop's colour.
A linear gradient fill (mirror of
model::Gradient): ordered colour stops (position0..=1, RGB, opacity) plus the axis angle in degrees clockwise from +X (0= left→right,90= top→bottom — the DrawingML convention). Carried alongside the flat RGB fill, which stays the first stop's colour.