You want the HDR content to be squashed down to SDR for preview. So you don't want the SDR content changing its gamut just because some HDR content shows up. a video editor editing an HDR video timeline/preview, inside an otherwise-SDR UI - the SDR content exists both before the HDR content is opened, continues to exist after it closes, and takes up the majority of the screen. In most situations where you're staring at a composited HDR+SDR signal for a long time - e.g. You might consider that to be the bug.īut I could see that being an intentional choice by Apple (though one that's maybe not thought out in the context of an iPad-as-consumption-device.) It's maybe strange that compositing HDR + SDR together results in SDR rather than HDR, of course. bring down the black level, lowering the seeming contrast level for darker content - in order to display bright lights as really really white)? Is that not just "adaptive gamut" or whatever it's called - where a display capable of HDR (like the recent miniLED-driven iPad displays) will still be driven with an SDR signal most of the time to save power (as SDR content has a lower contrast ratio, and so is less demanding of peak brightness), but will switch into HDR mode when displaying HDR content (and so "desaturate" - i.e.
And now it's something I always do when setting up a new Mac: bump the cursor size. So, whatever drawing routine was used to render subtitles causing the gamma to shift was also triggered by having a different default cursor, making it the same whether or not subtitles were on the screen.Įven though I found a fix, to this today I'm still furious that Apple – supposedly known for their quality, attention to detail, and good multimedia experience – could overlook this in their flagship app. without?) depending on whether the default cursor is being used or not. Supposedly, the reason was that macOS's cursor drawing is heavily optimized (potentially in the firmware?) and thus uses a different drawing path (maybe with GPU acceleration vs. This wasn't some kind of adaptive dimming from the screen I confirmed that the actual image (even when watching just on the laptop screen) was changing.Īfter some searching, a really wacky solution popped up: if you go into the Accessibility settings and bump up the size of the cursor ever so slightly, it'll fix it. Every time a subtitle appeared on the screen, the gamma (or something affecting brightness) would change ever so slightly, affecting the whole scene in a barely perceptible way.
MOUSE PATH VS IOGRAPH MOVIE
This was either in iTunes or TV.app, whichever was Apple's flagship movie watching app at the time. Years ago I was hosting a movie night and we were watching a dark, stylish black & white film that required subtitles. I can't provide the reason, but I can add a story that might shed light on the answer.
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