/// <summary>
/// Creates a DDS header from a set of information.
/// </summary>
/// <param name="Mips">Number of mipmaps.</param>
/// <param name="Height">Height of top mipmap.</param>
/// <param name="Width">Width of top mipmap.</param>
/// <param name="surfaceformat">Format header represents.</param>
public DDS_Header(int Mips, int Height, int Width, ImageEngineFormat surfaceformat, DXGI_FORMAT dx10Format = DXGI_FORMAT.DXGI_FORMAT_UNKNOWN)
{
dwSize = 124;
dwFlags = DDSdwFlags.DDSD_CAPS | DDSdwFlags.DDSD_HEIGHT | DDSdwFlags.DDSD_WIDTH | DDSdwFlags.DDSD_PIXELFORMAT | (Mips != 1 ? DDSdwFlags.DDSD_MIPMAPCOUNT : 0);
this.Width = Width;
this.Height = Height;
dwCaps = DDSdwCaps.DDSCAPS_TEXTURE | (Mips == 1 ? 0 : DDSdwCaps.DDSCAPS_COMPLEX | DDSdwCaps.DDSCAPS_MIPMAP);
dwMipMapCount = Mips == 1 ? 1 : Mips;
ddspf = new DDS_PIXELFORMAT(surfaceformat);
if (surfaceformat == ImageEngineFormat.DDS_DX10 || surfaceformat == ImageEngineFormat.DDS_ARGB_32F)
{
if (surfaceformat == ImageEngineFormat.DDS_ARGB_32F)
{
dx10Format = DXGI_FORMAT.DXGI_FORMAT_R32G32B32A32_FLOAT;
}
DX10_DXGI_AdditionalHeader = new DDS_DXGI_DX10_Additional
{
dxgiFormat = dx10Format,
resourceDimension = D3D10_RESOURCE_DIMENSION.DDS_DIMENSION_TEXTURE2D,
miscFlag = DDS_DXGI_DX10_Additional.D3D10_RESOURCE_MISC_FLAGS.D3D10_RESOURCE_MISC_GENERATE_MIPS,
miscFlags2 = DXGI_MiscFlags.DDS_ALPHA_MODE_UNKNOWN,
arraySize = 1
};
}
}
/// <summary>
/// Reads DDS header from stream.
/// </summary>
/// <param name="stream">Fully formatted DDS image.</param>
/// <returns>Header length.</returns>
protected override long Load(Stream stream)
{
base.Load(stream);
var temp = stream.ReadBytes(MaxHeaderSize);
if (!CheckIdentifier(temp))
{
throw new FormatException("Stream is not a recognised DDS image.");
}
// Start header
dwSize = BitConverter.ToInt32(temp, 4);
dwFlags = (DDSdwFlags)BitConverter.ToInt32(temp, 8);
Height = BitConverter.ToInt32(temp, 12);
Width = BitConverter.ToInt32(temp, 16);
dwPitchOrLinearSize = BitConverter.ToInt32(temp, 20);
dwDepth = BitConverter.ToInt32(temp, 24);
dwMipMapCount = BitConverter.ToInt32(temp, 28);
for (int i = 0; i < 11; ++i)
{
dwReserved1[i] = BitConverter.ToInt32(temp, 32 + (i * 4));
}
// DDS PixelFormat
ddspf = new DDS_PIXELFORMAT(temp);
dwCaps = (DDSdwCaps)BitConverter.ToInt32(temp, 108);
dwCaps2 = BitConverter.ToInt32(temp, 112);
dwCaps3 = BitConverter.ToInt32(temp, 116);
dwCaps4 = BitConverter.ToInt32(temp, 120);
dwReserved2 = BitConverter.ToInt32(temp, 124);
// DX10 Additional header
if (ddspf.dwFourCC == FourCC.DX10)
{
DX10_DXGI_AdditionalHeader = new DDS_DXGI_DX10_Additional(temp);
}
return(MaxHeaderSize);
}
/// <summary>
/// Reads DDS header from stream.
/// </summary>
/// <param name="stream">Fully formatted DDS image.</param>
/// <returns>Header length.</returns>
protected override long Load(Stream stream)
{
base.Load(stream);
var temp = stream.ReadBytes(HeaderSize);
if (!CheckIdentifier(temp))
throw new FormatException("Stream is not a recognised DDS image.");
// Start header
dwSize = BitConverter.ToInt32(temp, 4);
dwFlags = (DDSdwFlags)BitConverter.ToInt32(temp, 8);
Height = BitConverter.ToInt32(temp, 12);
Width = BitConverter.ToInt32(temp, 16);
dwPitchOrLinearSize = BitConverter.ToInt32(temp, 20);
dwDepth = BitConverter.ToInt32(temp, 24);
dwMipMapCount = BitConverter.ToInt32(temp, 28);
for (int i = 0; i < 11; ++i)
dwReserved1[i] = BitConverter.ToInt32(temp, 32 + (i * 4));
// DDS PixelFormat
ddspf = new DDS_PIXELFORMAT(temp);
dwCaps = (DDSdwCaps)BitConverter.ToInt32(temp, 108);
dwCaps2 = BitConverter.ToInt32(temp, 112);
dwCaps3 = BitConverter.ToInt32(temp, 116);
dwCaps4 = BitConverter.ToInt32(temp, 120);
dwReserved2 = BitConverter.ToInt32(temp, 124);
// DX10 Additional header
if (ddspf.dwFourCC == FourCC.DX10)
DX10_DXGI_AdditionalHeader = new DDS_DXGI_DX10_Additional(temp);
return HeaderSize;
}
