public async Task <Bitmap> LoadImageAsync(Xamarin.Forms.ImageSource imageSource, Context context, CancellationToken cancellationToken = default)
{
try
{
if (!IsValid(context))
{
return(null);
}
var source = ImageSourceBinding.GetImageSourceBinding(imageSource, null);
if (source == null)
{
return(null);
}
var result = await LoadImageAsync(source, imageSource, context, cancellationToken);
var target = result.Target as BitmapTarget;
return(target?.BitmapDrawable?.Bitmap);
}
catch (Exception)
{
return(null);
}
}
async void UpdateImage(Image imageView, CachedImage image, CachedImage previousImage)
{
CancelIfNeeded();
if (image == null || imageView == null)
{
return;
}
var ffSource = await ImageSourceBinding.GetImageSourceBinding(image.Source, image).ConfigureAwait(false);
if (ffSource == null)
{
if (_lastImageSource == null)
{
return;
}
_lastImageSource = null;
imageView.Source = null;
return;
}
if (previousImage != null && !ffSource.Equals(_lastImageSource))
{
_lastImageSource = null;
imageView.Source = null;
}
image.SetIsLoading(true);
var placeholderSource = await ImageSourceBinding.GetImageSourceBinding(image.LoadingPlaceholder, image).ConfigureAwait(false);
var errorPlaceholderSource = await ImageSourceBinding.GetImageSourceBinding(image.ErrorPlaceholder, image).ConfigureAwait(false);
image.SetupOnBeforeImageLoading(out TaskParameter imageLoader, ffSource, placeholderSource, errorPlaceholderSource);
if (imageLoader != null)
{
var finishAction = imageLoader.OnFinish;
var sucessAction = imageLoader.OnSuccess;
imageLoader.Finish((work) =>
{
finishAction?.Invoke(work);
ImageLoadingSizeChanged(image, false);
});
imageLoader.Success((imageInformation, loadingResult) =>
{
sucessAction?.Invoke(imageInformation, loadingResult);
_lastImageSource = ffSource;
});
imageLoader.LoadingPlaceholderSet(() => ImageLoadingSizeChanged(image, true));
_currentTask = imageLoader.Into(imageView);
}
}
private async void UpdateImage(Image imageView, CachedImage image, CachedImage previousImage)
{
CancelIfNeeded();
if (image == null || imageView == null || _isDisposed)
{
return;
}
ImageSourceBinding ffSource = await ImageSourceBinding.GetImageSourceBinding(image.Source, image)
.ConfigureAwait(continueOnCapturedContext: false);
if (ffSource == null)
{
if (_lastImageSource != null)
{
_lastImageSource = null;
imageView.Source = null;
}
return;
}
if (previousImage != null && !ffSource.Equals(_lastImageSource))
{
_lastImageSource = null;
imageView.Source = null;
}
image.SetIsLoading(isLoading: true);
ImageSourceBinding placeholderSource = await ImageSourceBinding.GetImageSourceBinding(image.LoadingPlaceholder, image).ConfigureAwait(continueOnCapturedContext: false);
ImageSourceBinding errorPlaceholderSource = await ImageSourceBinding.GetImageSourceBinding(image.ErrorPlaceholder, image).ConfigureAwait(continueOnCapturedContext: false);
image.SetupOnBeforeImageLoading(out var imageLoader, ffSource, placeholderSource, errorPlaceholderSource);
if (imageLoader != null)
{
Action <IScheduledWork> finishAction = imageLoader.OnFinish;
Action <ImageInformation, LoadingResult> sucessAction = imageLoader.OnSuccess;
imageLoader.Finish(delegate(IScheduledWork work)
{
finishAction?.Invoke(work);
ImageLoadingSizeChanged(image, isLoading: false);
});
imageLoader.Success(delegate(ImageInformation imageInformation, LoadingResult loadingResult)
{
sucessAction?.Invoke(imageInformation, loadingResult);
_lastImageSource = ffSource;
});
imageLoader.LoadingPlaceholderSet(delegate
{
ImageLoadingSizeChanged(image, isLoading: true);
});
if (!_isDisposed)
{
_currentTask = imageLoader.Into(imageView);
}
}
}
void UpdateImage()
{
if (IsDisposed)
{
return;
}
CancelIfNeeded();
var ffSource = ImageSourceBinding.GetImageSourceBinding(Element.Source, Element);
if (ffSource == null)
{
Control.Source = null;
return;
}
Element.SetIsLoading(true);
Control.Source = null;
var placeholderSource = ImageSourceBinding.GetImageSourceBinding(Element.LoadingPlaceholder, Element);
var errorPlaceholderSource = ImageSourceBinding.GetImageSourceBinding(Element.ErrorPlaceholder, Element);
TaskParameter imageLoader;
Element.SetupOnBeforeImageLoading(out imageLoader, ffSource, placeholderSource, errorPlaceholderSource);
if (imageLoader != null)
{
var finishAction = imageLoader.OnFinish;
var sucessAction = imageLoader.OnSuccess;
imageLoader.Success((imageInformation, loadingResult) =>
{
sucessAction?.Invoke(imageInformation, loadingResult);
});
imageLoader.Finish((work) =>
{
finishAction?.Invoke(work);
OnLoadFinished();
});
_currentTask = imageLoader.Into(Control);
}
}
public async Task <PImage> LoadImageAsync(Xamarin.Forms.ImageSource imageSource, CancellationToken cancellationToken = default, float scale = 1)
{
try
{
var source = ImageSourceBinding.GetImageSourceBinding(imageSource, null);
if (source == null)
{
return(null);
}
var result = await LoadImageAsync(source, imageSource, null, cancellationToken).ConfigureAwait(false);
var target = result?.Target as PImageTarget;
return(target?.PImage);
}
catch (Exception)
{
return(null);
}
}
public Task LoadImageAsync(Xamarin.Forms.ImageSource imageSource, ImageView imageView, CancellationToken cancellationToken = default)
{
try
{
if (!IsValid(imageView))
{
return(Task.CompletedTask);
}
var source = ImageSourceBinding.GetImageSourceBinding(imageSource, null);
if (source == null)
{
imageView.SetImageResource(Android.Resource.Color.Transparent);
return(Task.CompletedTask);
}
return(LoadImageAsync(source, imageSource, imageView, cancellationToken));
}
catch (Exception)
{
return(Task.CompletedTask);
}
}
private void UpdateImage(PImageView imageView, CachedImage image, CachedImage previousImage)
{
lock (_updateBitmapLock)
{
CancelIfNeeded();
if (image == null || imageView == null || imageView.Handle == IntPtr.Zero || _isDisposed)
{
return;
}
var ffSource = ImageSourceBinding.GetImageSourceBinding(image.Source, image);
if (ffSource == null)
{
if (_lastImageSource == null)
{
return;
}
_lastImageSource = null;
imageView.Image = null;
return;
}
if (previousImage != null && !ffSource.Equals(_lastImageSource))
{
_lastImageSource = null;
imageView.Image = null;
}
image.SetIsLoading(true);
var placeholderSource = ImageSourceBinding.GetImageSourceBinding(image.LoadingPlaceholder, image);
var errorPlaceholderSource = ImageSourceBinding.GetImageSourceBinding(image.ErrorPlaceholder, image);
image.SetupOnBeforeImageLoading(out var imageLoader, ffSource, placeholderSource, errorPlaceholderSource);
if (imageLoader != null)
{
var finishAction = imageLoader.OnFinish;
var sucessAction = imageLoader.OnSuccess;
imageLoader.Finish((work) =>
{
finishAction?.Invoke(work);
ImageLoadingSizeChanged(image, false);
});
imageLoader.Success((imageInformation, loadingResult) =>
{
sucessAction?.Invoke(imageInformation, loadingResult);
_lastImageSource = ffSource;
});
imageLoader.LoadingPlaceholderSet(() => ImageLoadingSizeChanged(image, true));
if (!_isDisposed)
{
_currentTask = imageLoader.Into(imageView);
}
}
}
}