public AndroidGIFImageParser(Context context, int sourceDensity, int targetDensity)
{
_context = context;
_sourceDensity = sourceDensity;
_targetDensity = targetDensity;
Animation = new FormsAnimationDrawable();
}
internal static async Task <FormsAnimationDrawable> GetFormsAnimationDrawableFromStream(Stream stream, Context context, BitmapFactory.Options options)
{
FormsAnimationDrawable animation = null;
using (var decoder = new AndroidGIFImageParser(context, options.InDensity, options.InTargetDensity))
{
try
{
if (!FileImageSourceHandler.DecodeSynchronously)
{
await decoder.ParseAsync(stream).ConfigureAwait(false);
}
else
{
decoder.ParseAsync(stream).Wait();
}
animation = decoder.Animation;
}
catch (GIFDecoderFormatException)
{
animation = null;
}
}
return(animation);
}
internal static async Task <FormsAnimationDrawable> GetFormsAnimationDrawableFromFile(string file, Context context, BitmapFactory.Options options)
{
FormsAnimationDrawable animation = null;
using (var stream = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read, DefaultBufferSize, true))
animation = await GetFormsAnimationDrawableFromStream(stream, context, options);
return(animation);
}
internal static async Task <FormsAnimationDrawable> GetFormsAnimationDrawableFromResource(int resourceId, Context context, BitmapFactory.Options options)
{
FormsAnimationDrawable animation = null;
using (var stream = context.Resources.OpenRawResource(resourceId))
animation = await GetFormsAnimationDrawableFromStream(stream, context, options);
return(animation);
}
public async Task <IFormsAnimationDrawable> LoadImageAnimationAsync(StreamImageSource imagesource, Context context, CancellationToken cancelationToken = default(CancellationToken))
{
var streamSource = imagesource as StreamImageSource;
FormsAnimationDrawable animation = null;
if (streamSource?.Stream != null)
{
using (Stream stream = await((IStreamImageSource)streamSource).GetStreamAsync(cancelationToken).ConfigureAwait(false))
{
int sourceDensity = 1;
int targetDensity = 1;
if (stream.CanSeek)
{
BitmapFactory.Options options = new BitmapFactory.Options();
options.InJustDecodeBounds = true;
await BitmapFactory.DecodeStreamAsync(stream, null, options);
sourceDensity = options.InDensity;
targetDensity = options.InTargetDensity;
stream.Seek(0, SeekOrigin.Begin);
}
using (var decoder = new AndroidGIFImageParser(context, sourceDensity, targetDensity))
{
try
{
await decoder.ParseAsync(stream).ConfigureAwait(false);
animation = decoder.Animation;
}
catch (GIFDecoderFormatException)
{
animation = null;
}
}
}
}
if (animation == null)
{
Internals.Log.Warning(nameof(ImageLoaderSourceHandler), "Image data was invalid: {0}", streamSource);
}
return(animation);
}
public static async Task <IFormsAnimationDrawable> LoadImageAnimationAsync(UriImageSource imagesource, Context context, CancellationToken cancelationToken = default(CancellationToken))
{
Uri uri = imagesource?.Uri;
FormsAnimationDrawable animation = null;
if (uri != null)
{
var options = new BitmapFactory.Options
{
InJustDecodeBounds = true
};
using (Stream stream = await imagesource.GetStreamAsync(cancelationToken).ConfigureAwait(false))
{
using (var decoder = new AndroidGIFImageParser(context, options.InDensity, options.InTargetDensity))
{
try
{
if (!FileImageSourceHandler.DecodeSynchronously)
{
await decoder.ParseAsync(stream).ConfigureAwait(false);
}
else
{
decoder.ParseAsync(stream).Wait();
}
animation = decoder.Animation;
}
catch (GIFDecoderFormatException ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
animation = null;
}
}
}
if (animation == null)
{
Log.Warning(nameof(FileImageSourceHandler), "Could not retrieve image or image data was invalid: {0}", imagesource);
}
}
return(animation);
}
public static async Task <IFormsAnimationDrawable> LoadImageAnimationAsync(FileImageSource imagesource, Context context, CancellationToken cancelationToken = default(CancellationToken))
{
string file = ((FileImageSource)imagesource).File;
FormsAnimationDrawable animation = null;
BitmapFactory.Options options = new BitmapFactory.Options
{
InJustDecodeBounds = true
};
int drawableIdentifier = ResourceManager.GetDrawableByName(file);
if (drawableIdentifier != 0)
{
if (!FileImageSourceHandler.DecodeSynchronously)
{
await BitmapFactory.DecodeResourceAsync(context.Resources, drawableIdentifier, options);
}
else
{
BitmapFactory.DecodeResource(context.Resources, drawableIdentifier, options);
}
animation = await GetFormsAnimationDrawableFromResource(drawableIdentifier, context, options);
}
else
{
animation = await GetFormsAnimationDrawableFromFile(file, context, options);
}
if (animation == null)
{
Internals.Log.Warning(nameof(FileImageSourceHandler), "Could not retrieve image or image data was invalid: {0}", imagesource);
}
return(animation);
}
public Task <IFormsAnimationDrawable> LoadImageAnimationAsync(ImageSource imagesource, Context context, CancellationToken cancelationToken = default, float scale = 1)
{
return(FormsAnimationDrawable.LoadImageAnimationAsync(imagesource, context, cancelationToken));
}
