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[client] wayland: retain coherent HDR state on failure

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Keep the reference white associated with the active PQ description until
a replacement is ready. If asynchronous description creation fails, the
renderer now retains the complete previous HDR state instead of combining
new white-level values with stale compositor metadata.
This commit is contained in:
Geoffrey McRae
2026-07-19 18:38:02 +10:00
parent c190aaf579
commit e9695f5084
3 changed files with 18 additions and 5 deletions
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6
client/displayservers/Wayland/wayland.c
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@@ -115,6 +115,7 @@ static bool waylandInit(const LG_DSInitParams params)
atomic_init(&wlWm.cmCanDoHDR, false);
atomic_init(&wlWm.hdrPQWhiteLevel, 203);
atomic_init(&wlWm.hdrScRGBWhiteLevel, 80);
atomic_init(&wlWm.hdrActivePQWhiteLevel, 203);
wlWm.display = wl_display_connect(NULL);
if (!wlWm.display)
@@ -235,9 +236,12 @@ static bool waylandGetProp(LG_DSProperty prop, void * ret)
if (prop == LG_DS_HDR_WHITE_LEVELS)
{
const bool activePQ = atomic_load(&wlWm.hdrActive) &&
atomic_load(&wlWm.hdrActivePQ);
*(LG_DSHDRWhiteLevels *)ret = (LG_DSHDRWhiteLevels)
{
.pq = atomic_load(&wlWm.hdrPQWhiteLevel),
.pq = activePQ ? atomic_load(&wlWm.hdrActivePQWhiteLevel) :
atomic_load(&wlWm.hdrPQWhiteLevel),
.scRGB = atomic_load(&wlWm.hdrScRGBWhiteLevel),
};
return true;