public async Task Write(PlatformImage image, System.IO.Stream stream, CancellationToken token)
{
await Task.Run(async() =>
{
var impl = image.Native as BitmapDrawable;
if (impl == null)
{
throw new ImageOperationException();
}
var bitmap = impl.Bitmap;
await bitmap.CompressAsync(Bitmap.CompressFormat.Png, 100, stream);
token.ThrowIfCancellationRequested();
});
}
public Task <PlatformImage> Resize(PlatformImage image, float sx, float sy)
{
return(Task.Run(() =>
{
var impl = image.Native as BitmapDrawable;
if (impl == null)
{
throw new ImageOperationException();
}
var b = impl.Bitmap;
var sizeX = Math.Round(impl.IntrinsicWidth * sx);
var sizeY = Math.Round(impl.IntrinsicHeight * sy);
var resized = Bitmap.CreateScaledBitmap(b, (int)sizeX, (int)sizeY, false);
return new PlatformImage(new BitmapDrawable(resized));
}));
}
private async Task <bool> MakeLoadTask(CancellationToken token)
{
try
{
Stream stream = null;
var httpClient = MakeHttpClient();
using (var response = await httpClient.GetAsync(Uri, token))
{
if (response.IsSuccessStatusCode)
{
stream = await response.Content.ReadAsStreamAsync();
}
else
{
throw new HttpRequestException(response.ReasonPhrase);
}
}
using (var buffer = new MemoryStream())
{
await stream.CopyToAsync(buffer, 4096, token);
buffer.Position = 0;
Bitmap = await PlatformImage.LoadFromStream(buffer, token);
}
IsLoaded = true;
return(true);
}
catch (HttpRequestException e)
{
LoadError = e;
}
catch (IOException e)
{
LoadError = e;
}
return(false);
}
public Size Size(PlatformImage image)
{
return((Size)((UIImage)image.Native).Size);
}
public static Drawable Drawable(this PlatformImage image)
{
return(image.Native as Drawable);
}
public Size Size(PlatformImage image)
{
var nativeImage = image.Native as Drawable;
return(new Size(nativeImage.IntrinsicWidth, nativeImage.IntrinsicHeight));
}
public RemoteImage(Uri uri, PlatformImage img) : this(uri)
{
IsLoaded = true;
Bitmap = img;
}
void IPlatformRemoteImageView.SetImage(PlatformImage image)
{
SetImageDrawable(image.Drawable());
}
void IPlatformRemoteImageView.SetImage(PlatformImage image)
{
ImageView.Image = image.UIImage();
}