/// <summary>
/// Decodes the specified stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>This.</returns>
public override FileBase Decode(Stream stream)
{
Header = FileHeader.Read(stream);
ScreenDescriptor = LogicalScreenDescriptor.Read(stream);
if (ScreenDescriptor.GlobalColorTablePresent)
{
ColorTable = ColorTable.Read(stream, ScreenDescriptor.GlobalColorTableSize);
}
var Flag = stream.ReadByte();
while (Flag != SectionTypes.Terminator)
{
if (Flag == SectionTypes.ImageLabel)
{
Frames.Add(Frame.Read(stream, ColorTable, GraphicsControlExtension, ScreenDescriptor, Frames));
}
else if (Flag == SectionTypes.ExtensionIntroducer)
{
var Label = (SectionTypes)stream.ReadByte();
if (Label == SectionTypes.GraphicControlLabel)
{
GraphicsControlExtension = GraphicsControl.Read(stream);
}
else if (Label == SectionTypes.CommentLabel)
{
Comment.Read(stream);
}
else if (Label == SectionTypes.ApplicationExtensionLabel)
{
ApplicationExtension.Read(stream);
}
else if (Label == SectionTypes.PlainTextLabel)
{
PlainText.Read(stream);
}
}
else if (Flag == SectionTypes.EndIntroducer)
{
break;
}
Flag = stream.ReadByte();
}
return(this);
}
/// <summary>
/// Loads the animation.
/// </summary>
/// <param name="animation">The animation.</param>
/// <param name="quantizedImage">The quantized image.</param>
private void LoadAnimation(Animation animation, QuantizedImage quantizedImage)
{
var TempImage = animation[0];
var TransparencyIndex = quantizedImage.TransparentIndex;
Header = new FileHeader();
ScreenDescriptor = new LogicalScreenDescriptor(TempImage, TransparencyIndex, BitDepth);
Frames.Add(new Frame(TempImage, quantizedImage, BitDepth, animation.Delay));
if (animation.Count > 1)
{
AppExtension = new ApplicationExtension(animation.RepeatCount, animation.Count);
for (int x = 1; x < animation.Count; ++x)
{
quantizedImage = Quantizer.Quantize(animation[x], Quality);
TempImage = animation[x];
Frames.Add(new Frame(TempImage, quantizedImage, BitDepth, animation.Delay));
}
}
}
