public async Task <IDecodedImage <Bitmap> > DecodeAsync(Stream stream, string path, ImageSource source, ImageInformation imageInformation, TaskParameter parameters)
{
var result = new DecodedImage <Bitmap>();
var helper = new PlatformGifHelper();
await helper.ReadGifAsync(stream, path, parameters);
result.IsAnimated = helper.Frames.Count > 1;
if (result.IsAnimated && Configuration.AnimateGifs)
{
result.AnimatedImages = new AnimatedImage <Bitmap> [helper.Frames.Count];
for (int i = 0; i < helper.Frames.Count; i++)
{
var animatedImage = new AnimatedImage <Bitmap>();
animatedImage.Delay = helper.Frames[i].Delay;
animatedImage.Image = helper.Frames[i].Image;
result.AnimatedImages[i] = animatedImage;
}
}
else
{
result.IsAnimated = false;
result.Image = helper.Frames[0].Image;
}
return(result);
}
async Task <FFGifDrawable> PlatformGenerateGifImageAsync(string path, ImageSource source, Stream imageData, ImageInformation imageInformation, bool enableTransformations, bool isPlaceholder)
{
if (imageData == null)
{
throw new ArgumentNullException(nameof(imageData));
}
ThrowIfCancellationRequested();
try
{
var gifDecoder = new PlatformGifHelper();
await gifDecoder.ReadGifAsync(imageData, Parameters, (bmp) =>
{
return(PlatformTransformAsync(path, source, enableTransformations, isPlaceholder, bmp));
});
ThrowIfCancellationRequested();
var bitmap = gifDecoder.GetBitmap();
ThrowIfCancellationRequested();
return(new FFGifDrawable(Context.Resources, bitmap, gifDecoder));
}
finally
{
imageData.TryDispose();
}
}
public async Task <IDecodedImage <Bitmap> > DecodeAsync(Stream stream, string path, ImageSource source, ImageInformation imageInformation, TaskParameter parameters)
{
var result = new DecodedImage <Bitmap>();
var helper = new PlatformGifHelper();
await helper.ReadGifAsync(stream, path, parameters);
result.IsAnimated = helper.Frames.Count > 1;
if (result.IsAnimated && Configuration.AnimateGifs)
{
result.AnimatedImages = new AnimatedImage <Bitmap> [helper.Frames.Count];
for (int i = 0; i < helper.Frames.Count; i++)
{
var animatedImage = new AnimatedImage <Bitmap>
{
Delay = helper.Frames[i].Delay,
Image = helper.Frames[i].Image
};
result.AnimatedImages[i] = animatedImage;
}
}
else
{
result.IsAnimated = false;
result.Image = helper.Frames[0].Image;
}
if (result.Image != null)
{
imageInformation.SetOriginalSize(result.Image.Width, result.Image.Height);
imageInformation.SetCurrentSize(result.Image.Width, result.Image.Height);
}
else if (result.AnimatedImages != null)
{
if (result.AnimatedImages.Length > 0)
{
if (result.AnimatedImages[0].Image != null)
{
imageInformation.SetOriginalSize(result.AnimatedImages[0].Image.Width, result.AnimatedImages[0].Image.Height);
imageInformation.SetCurrentSize(result.AnimatedImages[0].Image.Width, result.AnimatedImages[0].Image.Height);
}
}
}
return(result);
}
internal FFGifDrawable(Resources resources, Bitmap bitmap, PlatformGifHelper gifHelper) : base(resources, bitmap)
{
GifHelper = gifHelper;
}