/// <summary>
/// Gets list of offset slots of the textures in the tpk block array.
/// </summary>
/// <param name="byteptr_t">Pointer to the tpk block array.</param>
/// <param name="offset">Partial 1 part3 offset in the tpk block array.</param>
protected override unsafe void GetOffsetSlots(byte *byteptr_t, int offset)
{
if (offset == -1)
{
return; // if Part3 does not exist
}
if (*(uint *)(byteptr_t + offset) != TPK.INFO_PART3_BLOCKID)
{
return; // check Part3 ID
}
int ReaderSize = 8 + *(int *)(byteptr_t + offset + 4);
int current = 8;
while (current < ReaderSize)
{
var offslot = new OffSlot();
offslot.Key = *(uint *)(byteptr_t + offset + current);
offslot.AbsoluteOffset = *(int *)(byteptr_t + offset + current + 4);
offslot.CompressedSize = *(int *)(byteptr_t + offset + current + 8);
offslot.ActualSize = *(int *)(byteptr_t + offset + current + 0xC);
offslot.ToHeaderOffset = *(int *)(byteptr_t + offset + current + 0x10);
offslot.UnknownInt32 = *(int *)(byteptr_t + offset + current + 0x14);
this.offslots.Add(offslot);
current += 0x18;
}
}
/// <summary>
/// Parses compressed texture and returns it on the output.
/// </summary>
/// <param name="byteptr_t">Pointer to the tpk block array.</param>
/// <param name="offslot">Offslot of the texture to be parsed</param>
/// <returns>Decompressed texture valid to the current support.</returns>
protected override unsafe void ParseCompTexture(byte *byteptr_t, OffSlot offslot)
{
byteptr_t += offslot.AbsoluteOffset;
if (*(uint *)byteptr_t != TPK.COMPRESSED_TEXTURE)
{
return; // if not a compressed texture
}
// Decompress all data excluding 0x18 byte header
var data = new byte[offslot.CompressedSize - 0x18];
for (int a1 = 0; a1 < data.Length; ++a1)
{
data[a1] = *(byteptr_t + 0x18 + a1);
}
data = JDLZ.Decompress(data);
// In compressed textures, their header lies right in the end (0x7C + 0x18 bytes)
fixed(byte *dataptr_t = &data[0])
{
int offset = data.Length - 0x7C - 0x18;
var Read = new Texture(dataptr_t, offset, 0x7C, this._collection_name, this.Database);
Read.ReadData(dataptr_t, 0, true);
uint compression = *(uint *)(dataptr_t + offset + 0x7C + 0xC);
this.compressions.Add(compression);
this.Textures.Add(Read);
}
}
