HDR output headroom (PROTOTYPE, ?hdr): how far above SDR white the
extended-range canvas may go, as a multiple of SDR white.
Resolved per DISPLAY, best source first:
url pinned by ?hdr=<n> / LuxarAppOptions.hdrHeadroom
manual a value set with the Headroom slider, remembered per display
measured the browser's live ScreenDetailed headroom (see display-identity)
model a conservative guess from the identified display model
default DEFAULT_HDR_HEADROOM
plus sdr (1x) while the window sits on a display that does not report
(dynamic-range: high) — e.g. dragged onto an external monitor whose HDR
mode is off. The HdrHeadroomController re-resolves when the window
changes display or the measured headroom changes (brightness).
HDR output headroom (PROTOTYPE,
?hdr): how far above SDR white the extended-range canvas may go, as a multiple of SDR white.Resolved per DISPLAY, best source first:
url pinned by
?hdr=<n>/LuxarAppOptions.hdrHeadroommanual a value set with the Headroom slider, remembered per display measured the browser's liveScreenDetailedheadroom (see display-identity) model a conservative guess from the identified display model default DEFAULT_HDR_HEADROOMplus
sdr(1x) while the window sits on a display that does not report(dynamic-range: high)— e.g. dragged onto an external monitor whose HDR mode is off. The HdrHeadroomController re-resolves when the window changes display or the measured headroom changes (brightness).