void ReadBlocksFromFile(BinaryReader reader)
{
GifGraphicsControlExtension capturedExtension = null;
while (true)
{
byte blockType = reader.ReadByte();
byte extensionType;
switch (blockType)
{
case GifConstants.ImageDescriptorLabel:
GifFrame frame = new GifFrame();
frame.ReadImageDescriptorFromFile(reader, capturedExtension);
_frames.Add(frame);
capturedExtension = null;
break;
case GifConstants.FileTerminatorLabel:
return;
case GifConstants.ExtensionLabel:
extensionType = reader.ReadByte();
switch (extensionType)
{
case GifConstants.GraphicsControlExtensionSubLabel:
capturedExtension = new GifGraphicsControlExtension();
capturedExtension.ReadFromFile(reader);
break;
default:
ReadUnknownBlockFromFile(reader, true);
break;
}
ReadBlockTerminatorFromFile(reader);
break;
default:
ReadUnknownBlockFromFile(reader, false);
ReadBlockTerminatorFromFile(reader);
break;
}
}
}
