private void ReadPaletted(long fileOffset)
{
var _palette = new List <RGBA>();
_imageData = new List <RGBA>();
int totalColorCount = _header.PaletteData.TotalColorCount;
if (totalColorCount == 0)
{
totalColorCount = _header.PaletteTotalColorCount;
}
// Read palettes
int rgbaSize = Marshal.SizeOf(new RGBA());
int paletteDataSize = totalColorCount * rgbaSize;
var content = _fileContainer.Read(fileOffset, paletteDataSize);
fileOffset += paletteDataSize;
for (int i = 0; i < totalColorCount; ++i)
{
var palette = ByteToStruct.Convert <RGBA>(content, i * rgbaSize, rgbaSize);
_palette.Add(palette);
}
// Read image indexes (references to palette)
int imageSize = _header.ImageData.Width * _header.ImageData.Height;
var indexData = _fileContainer.Read(fileOffset, imageSize);
fileOffset += imageSize;
if (fileOffset - DataOffset != DataSize)
{
throw new FileLoadException("Data read and data size do not match");
}
for (int i = 0; i < indexData.Length; ++i)
{
var index = indexData[i];
if (index < _palette.Count)
{
_imageData.Add(_palette[index]);
}
else
{
throw new FileLoadException("Palette index out of bounds");
}
}
}
private void Read()
{
var headerContent = _fileContainer.Read(DataOffset, Marshal.SizeOf(_header));
var fileOffset = DataOffset + Marshal.SizeOf(_header);
_header = ByteToStruct.Convert <Header>(headerContent);
if (_header.Version != 1)
{
throw new FileLoadException($"Unknown tex version: {_header.Version} in file {Name}");
}
if (_header.PaletteData.Flag == 1)
{
ReadPaletted(fileOffset);
}
else
{
throw new FileLoadException($"Can't handle tex files without palettedata. file {Name}");
}
}