protected virtual void ReadSubFiles(BinaryReader binaryReader, SffSpriteV2 sprite)
{
// Go to first sub file
binaryReader.BaseStream.Seek(sprite.SpriteOffset, SeekOrigin.Begin);
// Read all sprites
for (var i = 0; i < sprite.SpriteCount; ++i)
{
var subFile = new SpriteSubFileSffV2
{
SpriteGroup = binaryReader.ReadUInt16(),
SpriteNumber = binaryReader.ReadUInt16(),
SpriteImageWidth = binaryReader.ReadUInt16(),
SpriteImageHeight = binaryReader.ReadUInt16(),
SpriteImageXAxis = binaryReader.ReadUInt16(),
SpriteImageYAxis = binaryReader.ReadUInt16(),
SpriteLinkedIndex = binaryReader.ReadUInt16(),
CompressionMethod = binaryReader.ReadByte(),
ColorDepth = binaryReader.ReadByte(),
DataOffset = binaryReader.ReadUInt32(), // Offset to data
DataLength = binaryReader.ReadUInt32(),
PaletteIndex = binaryReader.ReadUInt16(),
LoadMode = binaryReader.ReadUInt16()
};
sprite.AddSubFile(subFile);
}
}
public override async Task <ISprite> ReadAsync(BinaryReader binaryReader, string signature, string version)
{
var sprite = new SffSpriteV2
{
Signature = signature, // 12 bytes
Version = version, // 4 bytes
Unknown1 = binaryReader.ReadBytes(10), // TODO: ???
PaletteMapOffset = binaryReader.ReadUInt32(),
Unknown2 = binaryReader.ReadBytes(6), // TODO: ???
SpriteOffset = binaryReader.ReadUInt32(), // First sprite offset
SpriteCount = binaryReader.ReadUInt32(), // Number of sprites
PaletteOffset = binaryReader.ReadUInt32(), // First palette offset
PaletteCount = binaryReader.ReadUInt32(), // Number of palettes
LDataOffset = binaryReader.ReadUInt32(), // Literal Block Data Information
LDataLength = binaryReader.ReadUInt32(), // Palettes + SpritesData(OnDemand)
TDataOffset = binaryReader.ReadUInt32(), // Translated Data Block Information
TDataLength = binaryReader.ReadUInt32(), // SpritesData(OnLoad)
Comment = binaryReader.ReadBytes(444) // Space for comment
};
this.ReadSubFiles(binaryReader, sprite);
this.ReadPalettesInfo(binaryReader, sprite);
this.ReadPalettesColors(binaryReader, sprite);
await this.ReadSubFilesDataAsync(binaryReader, sprite);
return(sprite);
}
protected virtual void ReadPalettesColors(BinaryReader binaryReader, SffSpriteV2 sprite)
{
var paletteReader = NegumContainer.Resolve <IPaletteReader>();
foreach (var palette in sprite.Palettes)
{
// Go to palette data
binaryReader.BaseStream.Seek(sprite.LDataOffset + palette.LDataOffset, SeekOrigin.Begin);
var paletteData = binaryReader.ReadBytes((int)palette.LDataLength);
// Read colors of palette - create temporary palette
var paletteWithColors = paletteReader.ReadExact(paletteData, palette.ColorNumber, true);
// Copy colors to destination palette
paletteWithColors.CopyTo(palette);
}
}
protected virtual void ReadPalettesInfo(BinaryReader binaryReader, SffSpriteV2 sprite)
{
// Go to first palette
binaryReader.BaseStream.Seek(sprite.PaletteOffset, SeekOrigin.Begin);
// Read all palettes
for (var i = 0; i < sprite.PaletteCount; ++i)
{
var palette = new Palette
{
GroupNumber = binaryReader.ReadUInt16(),
ItemNumber = binaryReader.ReadUInt16(),
ColorNumber = binaryReader.ReadUInt16(),
LinkedIndex = binaryReader.ReadUInt16(),
LDataOffset = binaryReader.ReadUInt32(),
LDataLength = binaryReader.ReadUInt32()
};
sprite.AddPalette(palette);
}
}
protected virtual async Task <IEnumerable <byte> > ParsePngAsync(ISffPngReader sffPngReader, SffSpriteV2 sprite,
ISpriteSubFileSffV2 subFile,
int pngFormat)
{
var ctx = new SffPngReaderContext
{
PngFormat = pngFormat,
RawImage = subFile.RawImage
};
if (sprite.Palettes.Count() > subFile.PaletteIndex)
{
ctx.Palette = sprite.Palettes.ElementAt(subFile.PaletteIndex);
}
var image = await sffPngReader.ReadAsync(ctx);
return(image);
}
protected virtual async Task ReadSubFilesDataAsync(BinaryReader binaryReader, SffSpriteV2 sprite)
{
var sffRle8Reader = NegumContainer.Resolve <ISffRle8Reader>();
var sffRle5Reader = NegumContainer.Resolve <ISffRle5Reader>();
var sffLz5Reader = NegumContainer.Resolve <ISffLz5Reader>();
var sffPngReader = NegumContainer.Resolve <ISffPngReader>();
// Read all sprites pixels
foreach (var subFileSffV2 in sprite.SpriteSubFiles)
{
var subFile = subFileSffV2 as SpriteSubFileSffV2;
binaryReader.BaseStream.Seek(
(subFile.LoadMode == 1 ? sprite.TDataOffset : sprite.LDataOffset) + subFile.DataOffset,
SeekOrigin.Begin);
if (subFile.CompressionMethod == 0) // No conversion
{
subFile.ImageSize = 0; // Indicate that there was no compression
subFile.RawImage = binaryReader.ReadBytes((int)subFile.DataLength);
}
else
{
const byte totalBytesPerImageSize = 4;
subFile.ImageSize = binaryReader.ReadUInt32();
if (subFile.DataLength >= totalBytesPerImageSize)
{
subFile.RawImage = binaryReader.ReadBytes((int)(subFile.DataLength - totalBytesPerImageSize));
}
else
{
continue;
}
}
if (subFile.DataLength == 0)
{
// TODO: Process sprite from linked index -> subFile.SpriteLinkedIndex
continue;
}
switch (subFile.CompressionMethod)
{
case 0: // Raw Data
subFile.Image = subFile.RawImage;
break;
case 1: // Invalid
break;
case 2: // RLE8 (Run-Length Encoding at 8 bits-per-pixel pixmap)
subFile.Image = await sffRle8Reader.ReadAsync(subFile.RawImage);
break;
case 3: // RLE5 (Run-Length Encoding at 5 bits-per-pixel pixmap)
subFile.Image = await sffRle5Reader.ReadAsync(subFile.RawImage);
break;
case 4: // LZ5
subFile.Image = await sffLz5Reader.ReadAsync(subFile.RawImage);
break;
case 10: // PNG8
subFile.Image = await ParsePngAsync(sffPngReader, sprite, subFile, 8);
break;
case 11: // PNG24
subFile.Image = await ParsePngAsync(sffPngReader, sprite, subFile, 24);
break;
case 12: // PNG32
subFile.Image = await ParsePngAsync(sffPngReader, sprite, subFile, 32);
break;
}
}
}
