private void Read(Stream stream, IEnumerable <GifExtension> controlExtensions, bool metadataOnly)
{
// Note: at this point, the label (0x01) has already been read
byte[] bytes = new byte[13];
stream.ReadAll(bytes, 0, bytes.Length);
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 = GifHelpers.ReadDataBlocks(stream, metadataOnly);
Text = Encoding.ASCII.GetString(dataBytes);
Extensions = controlExtensions.ToList().AsReadOnly();
}
private void Read(Stream stream)
{
byte[] bytes = GifHelpers.ReadDataBlocks(stream, false);
if (bytes != null)
{
this.Text = Encoding.ASCII.GetString(bytes);
}
}
private void Read(Stream stream)
{
// Note: at this point, the label (0xFE) has already been read
var bytes = GifHelpers.ReadDataBlocks(stream, false);
if (bytes != null)
{
Text = Encoding.ASCII.GetString(bytes);
}
}
private void Read(Stream stream)
{
byte[] buffer = new byte[12];
stream.ReadAll(buffer, 0, buffer.Length);
this.BlockSize = buffer[0];
if (this.BlockSize != 11)
{
throw GifHelpers.InvalidBlockSizeException("Application Extension", 11, this.BlockSize);
}
this.ApplicationIdentifier = Encoding.ASCII.GetString(buffer, 1, 8);
byte[] destinationArray = new byte[3];
Array.Copy(buffer, 9, destinationArray, 0, 3);
this.AuthenticationCode = destinationArray;
this.Data = GifHelpers.ReadDataBlocks(stream, false);
}
private void Read(Stream stream)
{
// Note: at this point, the label (0xFF) has already been read
byte[] bytes = new byte[12];
stream.ReadAll(bytes, 0, bytes.Length);
BlockSize = bytes[0]; // should always be 11
if (BlockSize != 11)
{
throw GifHelpers.InvalidBlockSizeException("Application Extension", 11, BlockSize);
}
ApplicationIdentifier = Encoding.ASCII.GetString(bytes, 1, 8);
byte[] authCode = new byte[3];
Array.Copy(bytes, 9, authCode, 0, 3);
AuthenticationCode = authCode;
Data = GifHelpers.ReadDataBlocks(stream, false);
}
private void Read(Stream stream, IEnumerable <GifExtension> controlExtensions, bool metadataOnly)
{
byte[] buffer = new byte[13];
stream.ReadAll(buffer, 0, buffer.Length);
this.BlockSize = buffer[0];
if (this.BlockSize != 12)
{
throw GifHelpers.InvalidBlockSizeException("Plain Text Extension", 12, this.BlockSize);
}
this.Left = BitConverter.ToUInt16(buffer, 1);
this.Top = BitConverter.ToUInt16(buffer, 3);
this.Width = BitConverter.ToUInt16(buffer, 5);
this.Height = BitConverter.ToUInt16(buffer, 7);
this.CellWidth = buffer[9];
this.CellHeight = buffer[10];
this.ForegroundColorIndex = buffer[11];
this.BackgroundColorIndex = buffer[12];
byte[] bytes = GifHelpers.ReadDataBlocks(stream, metadataOnly);
this.Text = Encoding.ASCII.GetString(bytes);
this.Extensions = controlExtensions.ToList <GifExtension>().AsReadOnly();
}
private void Read(Stream stream, bool metadataOnly)
{
this.LzwMinimumCodeSize = (byte)stream.ReadByte();
this.CompressedData = GifHelpers.ReadDataBlocks(stream, metadataOnly);
}
