public byte[] GetFrame(int index)
{
if (index >= Frames.Length)
{
throw new ArgumentException("index");
}
if (null != Frames[index])
{
return(Frames[index]);
}
var entry = Dir.ElementAt(index) as EriEntry;
byte[] prev_frame = null;
if (index > 0 && entry.IsDiff)
{
prev_frame = GetFrame(index - 1);
}
using (var stream = File.CreateStream(entry.Offset, entry.Size))
{
var reader = new EriReader(stream, Info, Palette, prev_frame);
reader.DecodeImage();
Frames[index] = reader.Data;
}
return(Frames[index]);
}
public byte[] GetFrame(int index)
{
if (index >= Frames.Length)
{
throw new ArgumentException("index");
}
if (null != Frames[index])
{
return(Frames[index]);
}
var entry = Dir.ElementAt(index);
byte[] pixels;
using (var stream = OpenEntry(entry))
{
pixels = new byte[stream.Length];
stream.Read(pixels, 0, pixels.Length);
}
if (index > 0)
{
var prev_frame = GetFrame(index - 1);
for (int i = 0; i < pixels.Length; ++i)
{
pixels[i] += prev_frame[i];
}
}
Frames[index] = pixels;
return(pixels);
}
