89d59da9ea
Flutter needs a strong story around pausing animated GIFs because it affects accessibility via [MediaQueryData.disableAnimations](https://main-api.flutter.dev/flutter/widgets/MediaQueryData/disableAnimations.html). See https://github.com/flutter/flutter/issues/175516. ### Today Currently, it's possible to pause a gif using TickerProvider. However, if paused on initial load, the first frame will never display, and I believe that's a bug. ```dart TickerMode( // Pauses the gif, but if set to false on first load, the first frame never loads. enabled: false, child: Image(image: myAnimatedGif), ), ``` Currently `disableAnimations` has no effect: ```dart MediaQuery( // Currently has no effect on the Image, until this PR. data: MediaQueryData(disableAnimations: true), child: Image(image: myAnimatedGif), ), ``` ### With this PR * MediaQueryData.disableAnimations can be used to pause a gif in the same way that TickerMode can be used today. * If either MediaQuery.disableAnimations or TickerMode cause a gif to be paused on first load, it will show its first frame before pausing. This is potentially a breaking change. * The docs clearly explain this behavior and how to pause a gif. Fixes https://github.com/flutter/flutter/issues/175516 Partial fix for https://github.com/flutter/flutter/issues/130976 Fixes Google b/419605327
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