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video: Clamp HDR levels before comparing for deduplication

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Eliminates some redundant HDR changed events due to comparing clamped and unclamped values.
This commit is contained in:
Frank Praznik
2025-09-19 11:01:32 -04:00
parent 1d42df07ef
commit 9b72545634
1 changed files with 18 additions and 16 deletions
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34
src/video/SDL_video.c
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@@ -1168,33 +1168,35 @@ float SDL_GetDisplayContentScale(SDL_DisplayID displayID)
void SDL_SetWindowHDRProperties(SDL_Window *window, const SDL_HDROutputProperties *HDR, bool send_event)
{
if (window->HDR.HDR_headroom != HDR->HDR_headroom || window->HDR.SDR_white_level != HDR->SDR_white_level) {
const SDL_HDROutputProperties HDR_clamped = {
SDL_max(HDR->SDR_white_level, 1.0f),
SDL_max(HDR->HDR_headroom, 1.0f)
};
if (window->HDR.HDR_headroom != HDR_clamped.HDR_headroom || window->HDR.SDR_white_level != HDR_clamped.SDR_white_level) {
SDL_PropertiesID window_props = SDL_GetWindowProperties(window);
SDL_SetFloatProperty(window_props, SDL_PROP_WINDOW_HDR_HEADROOM_FLOAT, SDL_max(HDR->HDR_headroom, 1.0f));
SDL_SetFloatProperty(window_props, SDL_PROP_WINDOW_SDR_WHITE_LEVEL_FLOAT, SDL_max(HDR->SDR_white_level, 1.0f));
SDL_SetBooleanProperty(window_props, SDL_PROP_WINDOW_HDR_ENABLED_BOOLEAN, HDR->HDR_headroom > 1.0f);
SDL_copyp(&window->HDR, HDR);
SDL_SetFloatProperty(window_props, SDL_PROP_WINDOW_HDR_HEADROOM_FLOAT, HDR_clamped.HDR_headroom);
SDL_SetFloatProperty(window_props, SDL_PROP_WINDOW_SDR_WHITE_LEVEL_FLOAT, HDR_clamped.SDR_white_level);
SDL_SetBooleanProperty(window_props, SDL_PROP_WINDOW_HDR_ENABLED_BOOLEAN, HDR_clamped.HDR_headroom > 1.0f);
SDL_copyp(&window->HDR, &HDR_clamped);
if (send_event) {
SDL_SendWindowEvent(window, SDL_EVENT_WINDOW_HDR_STATE_CHANGED, HDR->HDR_headroom > 1.0f, 0);
SDL_SendWindowEvent(window, SDL_EVENT_WINDOW_HDR_STATE_CHANGED, HDR_clamped.HDR_headroom > 1.0f, 0);
}
}
}
void SDL_SetDisplayHDRProperties(SDL_VideoDisplay *display, const SDL_HDROutputProperties *HDR)
{
bool changed = false;
const SDL_HDROutputProperties HDR_clamped = {
SDL_max(HDR->SDR_white_level, 1.0f),
SDL_max(HDR->HDR_headroom, 1.0f)
};
const bool changed = HDR_clamped.SDR_white_level != display->HDR.SDR_white_level ||
HDR_clamped.HDR_headroom != display->HDR.HDR_headroom;
if (HDR->SDR_white_level != display->HDR.SDR_white_level) {
display->HDR.SDR_white_level = SDL_max(HDR->SDR_white_level, 1.0f);
changed = true;
}
if (HDR->HDR_headroom != display->HDR.HDR_headroom) {
display->HDR.HDR_headroom = SDL_max(HDR->HDR_headroom, 1.0f);
changed = true;
}
SDL_copyp(&display->HDR, HDR);
SDL_copyp(&display->HDR, &HDR_clamped);
if (changed && !SDL_DriverSendsHDRChanges(_this)) {
for (SDL_Window *w = display->device->windows; w; w = w->next) {