using System.Collections.Generic; using Unity.UIWidgets.async2; using Unity.UIWidgets.foundation; using Unity.UIWidgets.services; using Unity.UIWidgets.ui; namespace Unity.UIWidgets.painting { public class PaintingBinding : ServicesBinding { protected override void initInstances() { base.initInstances(); instance = this; _imageCache = createImageCache(); if (shaderWarmUp != null) { shaderWarmUp.execute(); } } public new static PaintingBinding instance { get { return (PaintingBinding) ServicesBinding.instance; } set { Window.instance._binding = value; } } public static ShaderWarmUp shaderWarmUp = new DefaultShaderWarmUp(); public ImageCache imageCache => _imageCache; ImageCache _imageCache; public Listenable systemFonts { get { return _systemFonts; } } readonly _SystemFontsNotifier _systemFonts = new _SystemFontsNotifier(); protected virtual ImageCache createImageCache() { return new ImageCache(); } public Future instantiateImageCodec(byte[] bytes, int? cacheWidth = null, int? cacheHeight = null ) { D.assert(cacheWidth == null || cacheWidth > 0); D.assert(cacheHeight == null || cacheHeight > 0); return ui_.instantiateImageCodec( bytes, targetWidth: cacheWidth, targetHeight: cacheHeight ); } } internal class _SystemFontsNotifier : Listenable { readonly HashSet _systemFontsCallbacks = new HashSet(); void notifyListeners() { foreach (VoidCallback callback in _systemFontsCallbacks) { callback(); } } public void addListener(VoidCallback listener) { _systemFontsCallbacks.Add(listener); } public void removeListener(VoidCallback listener) { _systemFontsCallbacks.Remove(listener); } } public static partial class painting_ { public static ImageCache imageCache => PaintingBinding.instance.imageCache; } }