internal EriReader ReadImageData(IBinaryStream stream, EriMetaData meta) { stream.Position = meta.StreamPos; Color[] palette = null; using (var input = new EriFile(stream.AsStream)) { for (;;) // ReadSection throws an exception in case of EOF { var section = input.ReadSection(); if ("Stream " == section.Id) { continue; } if ("ImageFrm" == section.Id) { break; } if ("Palette " == section.Id && meta.BPP <= 8 && section.Length <= 0x400) { palette = ReadPalette(stream.AsStream, (int)section.Length); continue; } input.BaseStream.Seek(section.Length, SeekOrigin.Current); } } var reader = new EriReader(stream.AsStream, meta, palette); reader.DecodeImage(); if (!string.IsNullOrEmpty(meta.Description)) { var tags = ParseTagInfo(meta.Description); string ref_file; if (tags.TryGetValue("reference-file", out ref_file)) { ref_file = ref_file.TrimEnd(null); if (!string.IsNullOrEmpty(ref_file)) { if ((meta.BPP + 7) / 8 < 3) { throw new InvalidFormatException(); } ref_file = VFS.CombinePath(VFS.GetDirectoryName(meta.FileName), ref_file); using (var ref_src = VFS.OpenBinaryStream(ref_file)) { var ref_info = ReadMetaData(ref_src) as EriMetaData; if (null == ref_info) { throw new FileNotFoundException("Referenced image not found", ref_file); } ref_info.FileName = ref_file; var ref_reader = ReadImageData(ref_src, ref_info); reader.AddImageBuffer(ref_reader); } } } } return(reader); }
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]); }