public async void Share(string subject, string message, SKBitmap image)
{
var intent = new Intent(Intent.ActionSend);
//intent.PutExtra(Intent.ExtraSubject, subject);
intent.PutExtra(Intent.ExtraText, message);
intent.SetType("image/png");
var imageSource = new SKBitmapImageSource {
Bitmap = image
};
var handler = GetHandler(imageSource);
var bitmap = await handler.LoadImageAsync(imageSource, this);
var path = Environment.GetExternalStoragePublicDirectory(Environment.DirectoryDownloads
+ Java.IO.File.Separator + "shareImage.png");
using (var stream = new System.IO.FileStream(path.AbsolutePath, System.IO.FileMode.Create))
{
bitmap.Compress(Bitmap.CompressFormat.Png, 100, stream);
}
intent.PutExtra(Intent.ExtraStream, Android.Net.Uri.FromFile(path));
Forms.Context.StartActivity(Intent.CreateChooser(intent, "Share Image"));
}
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 BitmapReturnsSimilarImage()
{
using var bitmap = new SKBitmap(new SKImageInfo(100, 100));
var source = new SKBitmapImageSource {
Bitmap = bitmap
};
var result = await source.ToSKImageAsync();
Assert.NotNull(result);
var resultInfo = new SKImageInfo(result.Width, result.Height, result.ColorType, result.AlphaType, result.ColorSpace);
Assert.Equal(bitmap.Info, resultInfo);
}
public static SKBitmapImageSource Load(string source, Aspect aspect, double width, double height)
{
// No image needed?
if (string.IsNullOrWhiteSpace(source) || width <= 0 || height <= 0)
{
return(null);
}
// Read the image
string key = GetKey(source);
SkiaSharp.Extended.Svg.SKSvg svg = LoadSVG(key);
CalculateBounds(true, svg, aspect, width, height, out SKMatrix drawMatrix, out SKSizeI pixelSize);
// Check the cache
if (ImageSourceCache.TryGetValue(key, out Tuple <SKSizeI, SKBitmapImageSource> cacheEntry))
{
if (cacheEntry.Item1.Width >= pixelSize.Width * (1 - CacheTolerance) &&
cacheEntry.Item1.Height >= pixelSize.Height * (1 - CacheTolerance))
{
// Already cached
return(cacheEntry.Item2);
}
else
{
// Dispose/remove current entry
cacheEntry.Item2.Bitmap?.Dispose();
ImageSourceCache.Remove(key);
}
}
// Convert to an SKBitmapImageSource
using (SKImage image = SKImage.FromPicture(svg.Picture, pixelSize, drawMatrix))
{
SKBitmapImageSource imageSource = new SKBitmapImageSource()
{
Bitmap = SKBitmap.FromImage(image)
};
ImageSourceCache.Add(key, Tuple.Create(pixelSize, imageSource));
return(imageSource);
}
}