public override Task <IImageSourceServiceResult <Drawable>?> GetDrawableAsync(IImageSource imageSource, Context context, CancellationToken cancellationToken = default)
{
var fontImageSource = (IFontImageSource)imageSource;
if (!fontImageSource.IsEmpty)
{
var size = FontManager.GetFontSize(fontImageSource.Font);
var unit = fontImageSource.Font.AutoScalingEnabled ? ComplexUnitType.Sp : ComplexUnitType.Dip;
var textSize = TypedValue.ApplyDimension(unit, size.Value, context?.Resources?.DisplayMetrics);
var typeface = FontManager.GetTypeface(fontImageSource.Font);
var color = (fontImageSource.Color ?? Graphics.Colors.White).ToPlatform();
try
{
var drawableCallback = new ImageLoaderResultCallback();
PlatformInterop.LoadImageFromFont(
context,
color,
fontImageSource.Glyph,
typeface,
textSize,
drawableCallback);
return(drawableCallback.Result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to generate font image '{Glyph}'.", fontImageSource.Glyph);
throw;
}
}
return(Task.FromResult <IImageSourceServiceResult <Drawable>?>(null));
}
public override Task <IImageSourceServiceResult <Drawable>?> GetDrawableAsync(IImageSource imageSource, Context context, CancellationToken cancellationToken = default)
{
var fileImageSource = (IFileImageSource)imageSource;
if (!fileImageSource.IsEmpty)
{
try
{
var id = context?.GetDrawableId(fileImageSource.File) ?? -1;
if (id > 0)
{
var d = context?.GetDrawable(id);
if (d is not null)
{
return(Task.FromResult <IImageSourceServiceResult <Drawable>?>(new ImageSourceServiceResult(d)));
}
}
var drawableCallback = new ImageLoaderResultCallback();
PlatformInterop.LoadImageFromFile(context, fileImageSource.File, drawableCallback);
return(drawableCallback.Result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to load image file '{File}'.", fileImageSource.File);
throw;
}
}
return(Task.FromResult <IImageSourceServiceResult <Drawable>?>(null));
}
public override async Task <IImageSourceServiceResult <Drawable>?> GetDrawableAsync(IImageSource imageSource, Context context, CancellationToken cancellationToken = default)
{
var streamImageSource = (IStreamImageSource)imageSource;
if (!streamImageSource.IsEmpty)
{
Stream?stream = null;
try
{
stream = await streamImageSource.GetStreamAsync(cancellationToken).ConfigureAwait(false);
var drawableCallback = new ImageLoaderResultCallback();
PlatformInterop.LoadImageFromStream(context, stream, drawableCallback);
var result = await drawableCallback.Result.ConfigureAwait(false);
stream?.Dispose();
return(result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to load image stream.");
throw;
}
finally
{
if (stream != null)
{
GC.KeepAlive(stream);
}
}
}
return(null);
}
public override Task <IImageSourceServiceResult <Drawable>?> GetDrawableAsync(IImageSource imageSource, Context context, CancellationToken cancellationToken = default)
{
var uriImageSource = (IUriImageSource)imageSource;
if (!uriImageSource.IsEmpty)
{
try
{
var drawableCallback = new ImageLoaderResultCallback();
PlatformInterop.LoadImageFromUri(context, uriImageSource.Uri.OriginalString, new Java.Lang.Boolean(uriImageSource.CachingEnabled), drawableCallback);
return(drawableCallback.Result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to load image uri '{Uri}'.", uriImageSource.Uri.OriginalString);
throw;
}
}
return(Task.FromResult <IImageSourceServiceResult <Drawable>?>(null));
}
