public static Span <byte> Create(TextureFormat format,
Caps capabilities,
Caps2 capabilities2,
int width, int height,
int?depth, int?mipMapCount,
int?pitch, int?linearSize)
{
Span <byte> data = new byte[128];
data.WriteInt32At(0, Magic);
data.WriteInt32At(4, Length - 4); // Remove 4 from length for magic size
var flags = DefaultFlags;
if (depth.HasValue)
{
flags |= DdsFlags.Depth;
}
if (mipMapCount.HasValue)
{
flags |= DdsFlags.MipMapCount;
}
if (pitch.HasValue)
{
flags |= DdsFlags.Pitch;
}
if (linearSize.HasValue)
{
flags |= DdsFlags.LinearSize;
}
data.WriteInt32At(8, (int)flags);
data.WriteInt32At(12, height);
data.WriteInt32At(16, width);
data.WriteInt32At(20, (pitch ?? linearSize).GetValueOrDefault());
data.WriteInt32At(24, depth.GetValueOrDefault());
data.WriteInt32At(28, mipMapCount.GetValueOrDefault() == 0 ? 1 : mipMapCount.GetValueOrDefault());
// 44 bytes of reserved space
DdsPixelFormat.Write(format, data.Slice(76));
if (flags.HasFlag(DdsFlags.MipMapCount))
{
capabilities |= Caps.MipMap;
}
data.WriteInt32At(108, (int)capabilities);
data.WriteInt32At(112, (int)capabilities2);
data.WriteInt32At(116, 0); // Caps3 (unused)
data.WriteInt32At(120, 0); // Caps4 (unused)
data.WriteInt32At(124, 0); // Reserved
return(data);
}
