public DdsImage ToDds(int index)
{
if (index < 0 || index >= Bitmaps.Count)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
var submap = Bitmaps[index];
var resource = InterleavedResources.Any()
? InterleavedResources[submap.InterleavedIndex].ResourcePointer
: Resources[index].ResourcePointer;
int virtualWidth, virtualHeight;
if (cache.Metadata.IsMcc)
{
virtualWidth = submap.Width;
virtualHeight = submap.Height * submap.FaceCount;
}
else
{
TextureUtils.GetVirtualSize(submap.BitmapFormat, submap.Width, submap.Height, submap.FaceCount, out virtualWidth, out virtualHeight);
}
var lod0Size = virtualWidth * virtualHeight * submap.BitmapFormat.Bpp() / 8;
var data = resource.ReadData(PageType.Auto, lod0Size);
if (cache.ByteOrder == ByteOrder.BigEndian)
{
var unitSize = submap.BitmapFormat.LinearUnitSize();
for (int i = 0; i < data.Length - 1; i += unitSize)
{
Array.Reverse(data, i, unitSize);
}
}
if (submap.Flags.HasFlag(BitmapFlags.Swizzled))
{
data = TextureUtils.XTextureScramble(data, virtualWidth, virtualHeight, submap.BitmapFormat, false);
}
if (virtualWidth > submap.Width || virtualHeight > submap.Height)
{
data = TextureUtils.ApplyCrop(data, submap.BitmapFormat, submap.FaceCount, virtualWidth, virtualHeight, submap.Width, submap.Height * submap.FaceCount);
}
return(TextureUtils.GetDds(submap.Height, submap.Width, submap.BitmapFormat, submap.BitmapType == TextureType.CubeMap, data, cache.Metadata.IsMcc));
}