예제 #1
0
        public static Task <SKImage?> ToSKImageAsync(this ImageSource imageSource, CancellationToken cancellationToken = default)
        {
            if (imageSource == null)
            {
                throw new ArgumentNullException(nameof(imageSource));
            }

            return(imageSource switch
            {
                // 1. first try SkiaSharp sources
                SKImageImageSource iis => FromSkia(iis.Image),
                SKBitmapImageSource bis => FromSkia(SKImage.FromBitmap(bis.Bitmap)),
                SKPixmapImageSource xis => FromSkia(SKImage.FromPixels(xis.Pixmap)),
                SKPictureImageSource pis => FromSkia(SKImage.FromPicture(pis.Picture, pis.Dimensions)),

                // 2. then try Stream sources
                StreamImageSource stream => FromStream(stream.Stream.Invoke(cancellationToken)),
                UriImageSource uri => FromStream(uri.GetStreamAsync(cancellationToken)),

                // 3. finally, use the handlers
                FileImageSource file => FromHandler(PlatformToSKImageAsync(file, cancellationToken)),
                FontImageSource font => FromHandler(PlatformToSKImageAsync(font, cancellationToken)),

                // 4. all is lost
                _ => throw new ArgumentException("Unable to determine the type of image source.", nameof(imageSource))
            });
        public async Task PixmapReturnsSimilarImage()
        {
            using var bitmap = new SKBitmap(new SKImageInfo(100, 100));
            using var pixmap = bitmap.PeekPixels();

            var source = new SKPixmapImageSource {
                Pixmap = pixmap
            };

            var result = await source.ToSKImageAsync();

            Assert.NotNull(result);

            Assert.Equal(bitmap.Info, pixmap.Info);
        }