Multiple Safari failures on Desktop and Mobile

[bhouston]

Having a lot of failures on Safari both on desktop and mobile. Is It supported? If it isn't supported, why not?

Failure 1:

On mobile the latest live demos (https://mediapipe.dev/demo/face_mesh, https://mediapipe.dev/demo/hands) fail with this in the console on iOS:

Unhandled Promise Rejection: NotAllowedError: The request is not allowed by the user agent or the platform in the current context, possibly because the user denied permission.

Failure 2:

Chrome on iOS also fails to load. I suspect it is the same reason - because it is actually Safari Webview underneath.

Failure 3:

On desktop they fail with this command when all "experimental features" (which includes WebGPU and WebGL2) are disabled:

[Error] Unhandled Promise Rejection: TypeError: GLctx["texStorage2D"] is not a function. (In 'GLctx["texStorage2D"](x0,x1,x2,x3,x4)', 'GLctx["texStorage2D"]' is undefined)
	(anonymous function) (face_mesh_solution_wasm_bin.js:9:273218)
	promiseReactionJob

Failure 4:

If I enable WebGL2 on desktop Safari I get a black screen, but it doesn't appear to explicitly error out:

The only thing I've got working so far is Chrome on MacOS.

Is it because Safari isn't part of the CI/CD tool chain? Was there a decision to not support Safari because it lacked WebGL2? Just wondering. It does mean that because of this gap, MediaPipe is not web-ready at this time. Safari accounts for 20% of all web browser traffic: https://gs.statcounter.com/browser-market-share

[bhouston]

Interesting fact. I downloaded the Safari Technical Preview -- the latest -- and these examples now work.

[tyrmullen]

The Visualizer demos should generally run on a wider range of platforms than the latest code-pen demos, which are faster/fancier, but not yet as x-browser. There are two separate issues here to get the code-pens running on iOS: mobile support, and Safari support.

Mobile support is a little trickier for these, but Safari, as you have surmised, is just missing WebGL2, which is why the latest Safari Technology Preview works. We're working on supporting WebGL1 for these demos as well, but still have a few small issues to work out. My comment on #1427 has more specifics. Closing this issue as duplicate, to consolidate.