internal static async Task <GifBlock> ReadAsync(Stream stream, IEnumerable <GifExtension> controlExtensions)
{
int blockId = await stream.ReadByteAsync().ConfigureAwait(false);
if (blockId < 0)
{
throw new EndOfStreamException();
}
return(blockId switch
{
GifExtension.ExtensionIntroducer => await GifExtension.ReadAsync(stream, controlExtensions).ConfigureAwait(false),
GifFrame.ImageSeparator => await GifFrame.ReadAsync(stream, controlExtensions).ConfigureAwait(false),
GifTrailer.TrailerByte => await GifTrailer.ReadAsync().ConfigureAwait(false),
_ => throw GifHelpers.UnknownBlockTypeException(blockId),
});
internal static async Task<GifBlock> ReadAsync(Stream stream, IEnumerable<GifExtension> controlExtensions)
{
int blockId = await stream.ReadByteAsync().ConfigureAwait(false);
if (blockId < 0)
throw GifHelpers.UnexpectedEndOfStreamException();
switch (blockId)
{
case GifExtension.ExtensionIntroducer:
return await GifExtension.ReadAsync(stream, controlExtensions).ConfigureAwait(false);
case GifFrame.ImageSeparator:
return await GifFrame.ReadAsync(stream, controlExtensions).ConfigureAwait(false);
case GifTrailer.TrailerByte:
return await GifTrailer.ReadAsync().ConfigureAwait(false);
default:
throw GifHelpers.UnknownBlockTypeException(blockId);
}
}
internal static async Task <GifBlock> ReadAsync(Stream stream, IEnumerable <GifExtension> controlExtensions)
{
int blockId = await stream.ReadByteAsync(new CancellationToken()).ConfigureAwait(false);
if (blockId < 0)
{
throw GifHelpers.UnexpectedEndOfStreamException();
}
switch (blockId)
{
case 33:
return((GifBlock)await GifExtension.ReadAsync(stream, controlExtensions).ConfigureAwait(false));
case 44:
return((GifBlock)await GifFrame.ReadAsync(stream, controlExtensions).ConfigureAwait(false));
case 59:
return((GifBlock)await GifTrailer.ReadAsync().ConfigureAwait(false));
default:
throw GifHelpers.UnknownBlockTypeException(blockId);
}
}