private async Task ReadInternalAsync(Stream stream, IEnumerable <GifExtension> controlExtensions)
{
// Note: at this point, the label (0x01) has already been read
byte[] bytes = new byte[13];
await stream.ReadAllAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
BlockSize = bytes[0];
if (BlockSize != 12)
{
throw GifHelpers.InvalidBlockSizeException("Plain Text Extension", 12, BlockSize);
}
Left = BitConverter.ToUInt16(bytes, 1);
Top = BitConverter.ToUInt16(bytes, 3);
Width = BitConverter.ToUInt16(bytes, 5);
Height = BitConverter.ToUInt16(bytes, 7);
CellWidth = bytes[9];
CellHeight = bytes[10];
ForegroundColorIndex = bytes[11];
BackgroundColorIndex = bytes[12];
var dataBytes = await GifHelpers.ReadDataBlocksAsync(stream).ConfigureAwait(false);
Text = GifHelpers.GetString(dataBytes);
Extensions = controlExtensions.ToList().AsReadOnly();
}
private async Task ReadInternalAsync(Stream stream)
{
byte[] bytes = new byte[12];
await stream.ReadAllAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
this.BlockSize = (int)bytes[0];
if (this.BlockSize != 11)
{
throw GifHelpers.InvalidBlockSizeException("Application Extension", 11, this.BlockSize);
}
this.ApplicationIdentifier = GifHelpers.GetString(bytes, 1, 8);
byte[] numArray = new byte[3];
Array.Copy((Array)bytes, 9, (Array)numArray, 0, 3);
this.AuthenticationCode = numArray;
this.Data = await GifHelpers.ReadDataBlocksAsync(stream, false).ConfigureAwait(false);
}
private async Task ReadInternalAsync(Stream stream)
{
byte[] bytes = new byte[6];
await stream.ReadAllAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
this.BlockSize = (int)bytes[0];
if (this.BlockSize != 4)
{
throw GifHelpers.InvalidBlockSizeException("Graphic Control Extension", 4, this.BlockSize);
}
byte num = bytes[1];
this.DisposalMethod = (GifFrameDisposalMethod)(((int)num & 28) >> 2);
this.UserInput = ((uint)num & 2U) > 0U;
this.HasTransparency = ((uint)num & 1U) > 0U;
this.Delay = (int)BitConverter.ToUInt16(bytes, 2) * 10;
this.TransparencyIndex = (int)bytes[4];
}
private async Task ReadInternalAsync(Stream stream)
{
// Note: at this point, the label (0xFF) has already been read
byte[] bytes = new byte[12];
await stream.ReadAllAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
BlockSize = bytes[0]; // should always be 11
if (BlockSize != 11)
{
throw GifHelpers.InvalidBlockSizeException("Application Extension", 11, BlockSize);
}
ApplicationIdentifier = GifHelpers.GetString(bytes, 1, 8);
byte[] authCode = new byte[3];
Array.Copy(bytes, 9, authCode, 0, 3);
AuthenticationCode = authCode;
Data = await GifHelpers.ReadDataBlocksAsync(stream).ConfigureAwait(false);
}
private async Task ReadInternalAsync(Stream stream)
{
// Note: at this point, the label (0xF9) has already been read
byte[] bytes = new byte[6];
await stream.ReadAllAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
BlockSize = bytes[0]; // should always be 4
if (BlockSize != 4)
{
throw GifHelpers.InvalidBlockSizeException("Graphic Control Extension", 4, BlockSize);
}
byte packedFields = bytes[1];
DisposalMethod = (GifFrameDisposalMethod)((packedFields & 0x1C) >> 2);
UserInput = (packedFields & 0x02) != 0;
HasTransparency = (packedFields & 0x01) != 0;
Delay = BitConverter.ToUInt16(bytes, 2) * 10; // milliseconds
TransparencyIndex = bytes[4];
}
private async Task ReadInternalAsync(Stream stream, IEnumerable <GifExtension> controlExtensions)
{
byte[] bytes = new byte[13];
await stream.ReadAllAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
this.BlockSize = (int)bytes[0];
if (this.BlockSize != 12)
{
throw GifHelpers.InvalidBlockSizeException("Plain Text Extension", 12, this.BlockSize);
}
this.Left = (int)BitConverter.ToUInt16(bytes, 1);
this.Top = (int)BitConverter.ToUInt16(bytes, 3);
this.Width = (int)BitConverter.ToUInt16(bytes, 5);
this.Height = (int)BitConverter.ToUInt16(bytes, 7);
this.CellWidth = (int)bytes[9];
this.CellHeight = (int)bytes[10];
this.ForegroundColorIndex = (int)bytes[11];
this.BackgroundColorIndex = (int)bytes[12];
this.Text = GifHelpers.GetString(await GifHelpers.ReadDataBlocksAsync(stream, false).ConfigureAwait(false));
this.Extensions = (IList <GifExtension>)controlExtensions.ToList <GifExtension>().AsReadOnly();
}