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ImageCache

gpui

Trait ImageCache 

Source 
pub trait ImageCache: 'static {
    // Required method
    fn load(
        &mut self,
        resource: &Resource,
        window: &mut Window,
        cx: &mut App,
    ) -> Option<Result<Arc<RenderImage>, ImageCacheError>>;
}
Expand description

A store of decoded images that img elements read from.

Implement it to control how images load and when they are released. RetainAllImageCache keeps every image until you clear it. Release images you no longer need, so they are removed from all windows.

Required Methods§

Source

fn load( &mut self, resource: &Resource, window: &mut Window, cx: &mut App, ) -> Option<Result<Arc<RenderImage>, ImageCacheError>>

Returns the image for resource if it is ready, or None while it loads.

This runs on every layout and paint of each image that uses the cache, so it must return quickly. Start the load in the background, return None, and notify the current view when the load finishes, as RetainAllImageCache does. The element is then drawn again.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§