private static void PatchXPR2Header(byte[] header, int t, int tOffset, int h, int hOffset, int w, int wOffset)
{
using (AwesomeWriter aw = new AwesomeWriter(new MemoryStream(header), true))
{
// Encodes texture size, height, and width
aw.Seek(tOffset, SeekOrigin.Begin);
aw.Write((int)t);
aw.Seek(hOffset, SeekOrigin.Begin);
aw.Write((short)((h >> 3) - 1));
aw.Seek(wOffset, SeekOrigin.Begin);
aw.Write((short)((w - 1) | 0xE000));
}
}
private void WriteToStream(Stream stream)
{
MagickImage image = new MagickImage(_image);
image.Format = MagickFormat.Dxt5;
// Header info
byte[] header;
int hOffset, wOffset, bpp;
int textureDataOffset = 2060;
switch (image.Format)
{
case MagickFormat.Dxt1:
header = xpr2_dxt1_120x120.ToArray();
image.Resize(120, 120);
hOffset = 0x50;
wOffset = 0x52;
bpp = 4;
break;
case MagickFormat.Dxt5:
header = xpr2_dxt5_2048x2048.ToArray();
image.Resize(2048, 2048);
hOffset = 0x60;
wOffset = 0x62;
bpp = 8;
break;
default:
// This shouldn't happen
return;
}
// Reads raw texture data
byte[] textureData = new byte[((image.Height * image.Width) * 8) / bpp];
using (MemoryStream ms = new MemoryStream())
{
// Writes DDS to stream
image.Write(ms);
// Copies raw DXT data
ms.Seek(128, SeekOrigin.Begin); // Skips header
ms.Read(textureData, 0, textureData.Length);
}
// Writes xpr2 header
PatchXPR2Header(header, textureData.Length, 8, image.Height, hOffset, image.Width, wOffset);
// Converts to x360 format
textureData = TileCompressedXbox360Texture(textureData, image.Width, image.Width, image.Height, image.Height, 4, 4, (16 * bpp) / 8);
SwapBytes(textureData);
// Writes to XPR2 stream
using (AwesomeWriter aw = new AwesomeWriter(stream, true))
{
aw.Write(header);
aw.Seek(textureDataOffset, SeekOrigin.Begin);
aw.Write(textureData);
}
}