pub fn render_rgba(
raw: &RawImage,
center: f64,
width: f64,
user_invert: bool,
) -> Vec<u8> ⓘExpand description
Apply a window/level and convert a RawImage to RGBA8.
The output is grey-on-grey (R = G = B = level) with full alpha. Cheap
enough to call on every drag delta for interactive W/L. The effective
inversion is raw.photometric_invert XOR user_invert, so toggling
“invert” on a MONOCHROME1 image cancels back to natural display.