public static LayerTranslator CreateImageLayerTranslator(ImageLayerContext context)
{
if (!Transforms.TryCreateContainerVisualTransformChain(context, out var containerVisualRootNode, out var containerVisualContentNode))
{
// The layer is never visible.
return(null);
}
var imageAsset = GetImageAsset(context);
if (imageAsset is null)
{
return(null);
}
var content = context.ObjectFactory.CreateSpriteVisual();
containerVisualContentNode.Children.Add(content);
content.Size = new Sn.Vector2((float)imageAsset.Width, (float)imageAsset.Height);
LoadedImageSurface surface;
var imageSize = $"{imageAsset.Width}x{imageAsset.Height}";
switch (imageAsset.ImageType)
{
case ImageAsset.ImageAssetType.Embedded:
var embeddedImageAsset = (EmbeddedImageAsset)imageAsset;
surface = LoadedImageSurface.StartLoadFromStream(embeddedImageAsset.Bytes);
surface.SetName(imageAsset.Id);
surface.SetDescription(context, $"Image: \"{embeddedImageAsset.Id}\" {embeddedImageAsset.Format} {imageSize}.");
break;
case ImageAsset.ImageAssetType.External:
var externalImageAsset = (ExternalImageAsset)imageAsset;
surface = LoadedImageSurface.StartLoadFromUri(new Uri($"file://localhost/{externalImageAsset.Path}{externalImageAsset.FileName}"));
surface.SetName(externalImageAsset.FileName);
var path = externalImageAsset.Path + externalImageAsset.FileName;
surface.SetDescription(context, $"\"{path}\" {imageSize}.");
context.Issues.ImageFileRequired(path);
break;
default:
throw new InvalidOperationException();
}
var imageBrush = context.ObjectFactory.CreateSurfaceBrush(surface);
content.Brush = imageBrush;
return(new LayerTranslator.FromVisual(containerVisualRootNode));
}
static ImageAsset GetImageAsset(ImageLayerContext context) => (ImageAsset)context.Translation.GetAssetById(context, context.Layer.RefId, Asset.AssetType.Image);
