Add launch screen (splash)

[dmitrylyzo]

I took the "Logo" parts from jellyfin/jellyfin-ux#46

It is larger than the one used in webOS, but aligned better, imo.

webOS	Tizen

The attributes are marked as "mandatory", but it also works with just image. 🤷‍♂️
https://docs.tizen.org/application/tizen-studio/web-tools/config-editor/#tizen-launch-screen

[dmitrylyzo]

Made the splashscreen similar to splashLogo in the web (fit into 30% of the width/height):

webOS	Tizen

convert banner-light.png -resize 576x324 -gravity center -background transparent -extent 1920x1080 splash_fg.png

or with a background

convert banner-light.png -resize 576x324 -gravity center -background '#000b25' -extent 1920x1080 splash.png

But... the splashscreen doesn't work on Tizen 4 TV (doesn't appear) and Tizen 3 emulator (doesn't hide). 😕
It works in Tizen 5 emulator. 🤷‍♂️

[HimbeersaftLP]

Would this replace the black square you get on the loading screen or will that only be there on the officially published version?

[dmitrylyzo]

It should have been displayed before the app was finished loading at startup, just like the webOS app does. Currently, there is a native Samsung spin with the Jellyfin Loading text below and the previous screen in the background.

But

the splashscreen doesn't work on Tizen 4 TV (doesn't appear) and Tizen 3 emulator (doesn't hide).
It works in Tizen 5 emulator.