public override async Task <ISprite> ReadAsync(BinaryReader binaryReader, string signature, string version)
{
var paletteReader = NegumContainer.Resolve <IPaletteReader>();
var pcxReader = NegumContainer.Resolve <IPcxReader>();
var sprite = new SffSpriteV1
{
Signature = signature,
Version = version,
GroupCount = binaryReader.ReadUInt32(),
ImageCount = binaryReader.ReadUInt32(),
PosFirstSubFileOffset = binaryReader.ReadUInt32(), // Next Sub File Offset
Length = binaryReader.ReadUInt32(), // Sub-Header Size
PaletteType = binaryReader.ReadByte(), // Shared Palette Byte; 0 - individual, 1 - shared
Blank = binaryReader.ReadBytes(3).ToUtf8String(),
Comments = binaryReader.ReadBytes(476).ToUtf8String()
};
for (var i = 0; i < sprite.ImageCount; ++i)
{
var subFile = await ReadSubFileAsync(pcxReader, binaryReader, i, paletteReader, sprite);
sprite.AddSubFile(subFile);
}
return(sprite);
}
protected virtual async Task <ISpriteSubFile> ReadSubFileAsync(IPcxReader pcxReader, BinaryReader binaryReader,
int index, IPaletteReader paletteReader, SffSpriteV1 sprite)
{
var subFile = new SpriteSubFileSffV1
{
DataOffset = binaryReader.ReadUInt32(),
DataLength = binaryReader.ReadUInt32(),
SpriteImageXAxis = binaryReader.ReadUInt16(),
SpriteImageYAxis = binaryReader.ReadUInt16(),
SpriteGroup = binaryReader.ReadUInt16(),
SpriteNumber = binaryReader.ReadUInt16(),
SpriteLinkedIndex = binaryReader.ReadUInt16(),
SamePalette = binaryReader.ReadByte(), // 1 - if the palette is the same as in previous sprite, 0 - new
Comment = binaryReader.ReadBytes(14).ToUtf8String()
};
if (subFile.SpriteLinkedIndex == 0)
{
binaryReader.BaseStream.Position -= 1;
var count = (int)(subFile.DataOffset - binaryReader.BaseStream.Position);
subFile.RawImage = binaryReader.ReadBytes(count);
}
if (index == 0) // TODO: Load only if palette available
{
var paletteData = binaryReader.ReadBytes(768);
var palette = await paletteReader.ReadAsync(paletteData);
sprite.Palette = palette.Reverse();
}
if (subFile.RawImage != null)
{
var pcxDetails = new PcxDetails
{
Stream = new MemoryStream(subFile.RawImage),
Palette = subFile.SamePalette == 1 ? sprite.SpriteSubFiles.ElementAt(0).Palette : null
};
subFile.PcxImage = await pcxReader.ReadAsync(pcxDetails);
}
binaryReader.BaseStream.Position = subFile.DataOffset;
return(subFile);
}
