//--------------------------------------------------------------------------------------
// dds.h
//
// This header defines constants and structures that are useful when parsing
// DDS files.  DDS files were originally designed to use several structures
// and constants that are native to DirectDraw and are defined in ddraw.h,
// such as DDSURFACEDESC2 and DDSCAPS2.  This file defines similar
// (compatible) constants and structures so that one can use DDS files
// without needing to include ddraw.h.
//--------------------------------------------------------------------------------------

#ifndef _DDS_H_
#define _DDS_H_

#pragma pack(push,1)

#define DDS_MAGIC 0x20534444 // "DDS "

#define MAKEFOURCC(ch0, ch1, ch2, ch3)  \
    ((unsigned int)(unsigned char)(ch0) | ((unsigned int)(unsigned char)(ch1) << 8) |  \
    ((unsigned int)(unsigned char)(ch2) << 16) | ((unsigned int)(unsigned char)(ch3) << 24 ))

struct DDS_PIXELFORMAT
{
  unsigned int dwSize;
  unsigned int dwFlags;
  unsigned int dwFourCC;
  unsigned int dwRGBBitCount;
  unsigned int dwRBitMask;
  unsigned int dwGBitMask;
  unsigned int dwBBitMask;
  unsigned int dwABitMask;
};

#define DDS_FOURCC      0x00000004  // DDPF_FOURCC
#define DDS_RGB         0x00000040  // DDPF_RGB
#define DDS_RGBA        0x00000041  // DDPF_RGB | DDPF_ALPHAPIXELS
#define DDS_LUMINANCE   0x00020000  // DDPF_LUMINANCE
#define DDS_ALPHA       0x00000002  // DDPF_ALPHA

const DDS_PIXELFORMAT DDSPF_DXT1 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','1'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT2 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','2'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT3 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','3'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT4 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','4'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_DXT5 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','T','5'), 0, 0, 0, 0, 0 };

const DDS_PIXELFORMAT DDSPF_A8R8G8B8 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000 };

const DDS_PIXELFORMAT DDSPF_A1R5G5B5 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 16, 0x00007c00, 0x000003e0, 0x0000001f, 0x00008000 };

const DDS_PIXELFORMAT DDSPF_A4R4G4B4 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 16, 0x00000f00, 0x000000f0, 0x0000000f, 0x0000f000 };

const DDS_PIXELFORMAT DDSPF_R8G8B8 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 24, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000 };

const DDS_PIXELFORMAT DDSPF_R5G6B5 =
    { sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 16, 0x0000f800, 0x000007e0, 0x0000001f, 0x00000000 };

// This indicates the DDS_HEADER_DXT10 extension is present (the format is in dxgiFormat)
const DDS_PIXELFORMAT DDSPF_DX10 =
    { sizeof(DDS_PIXELFORMAT), DDS_FOURCC, MAKEFOURCC('D','X','1','0'), 0, 0, 0, 0, 0 };

#define DDS_HEADER_FLAGS_TEXTURE        0x00001007  // DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT
#define DDS_HEADER_FLAGS_MIPMAP         0x00020000  // DDSD_MIPMAPCOUNT
#define DDS_HEADER_FLAGS_VOLUME         0x00800000  // DDSD_DEPTH
#define DDS_HEADER_FLAGS_PITCH          0x00000008  // DDSD_PITCH
#define DDS_HEADER_FLAGS_LINEARSIZE     0x00080000  // DDSD_LINEARSIZE

#define DDS_SURFACE_FLAGS_TEXTURE 0x00001000 // DDSCAPS_TEXTURE
#define DDS_SURFACE_FLAGS_MIPMAP  0x00400008 // DDSCAPS_COMPLEX | DDSCAPS_MIPMAP
#define DDS_SURFACE_FLAGS_CUBEMAP 0x00000008 // DDSCAPS_COMPLEX

#define DDS_CUBEMAP_POSITIVEX 0x00000600 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEX
#define DDS_CUBEMAP_NEGATIVEX 0x00000a00 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEX
#define DDS_CUBEMAP_POSITIVEY 0x00001200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEY
#define DDS_CUBEMAP_NEGATIVEY 0x00002200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEY
#define DDS_CUBEMAP_POSITIVEZ 0x00004200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEZ
#define DDS_CUBEMAP_NEGATIVEZ 0x00008200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEZ

#define DDS_CUBEMAP_ALLFACES ( DDS_CUBEMAP_POSITIVEX | DDS_CUBEMAP_NEGATIVEX |\
                               DDS_CUBEMAP_POSITIVEY | DDS_CUBEMAP_NEGATIVEY |\
                               DDS_CUBEMAP_POSITIVEZ | DDS_CUBEMAP_NEGATIVEZ )

#define DDS_FLAGS_VOLUME 0x00200000 // DDSCAPS2_VOLUME

struct DDS_HEADER
{
  unsigned int dwSize;
  unsigned int dwHeaderFlags;
  unsigned int dwHeight;
  unsigned int dwWidth;
  unsigned int dwPitchOrLinearSize;
  unsigned int dwDepth; // only if DDS_HEADER_FLAGS_VOLUME is set in dwHeaderFlags
  unsigned int dwMipMapCount;
  unsigned int dwReserved1[11];
  DDS_PIXELFORMAT ddspf;
  unsigned int dwSurfaceFlags;
  unsigned int dwCubemapFlags;
  unsigned int dwReserved2[3];
};

enum DXGI_FORMAT {
  DXGI_FORMAT_UNKNOWN = 0,
  DXGI_FORMAT_R32G32B32A32_TYPELESS = 1,
  DXGI_FORMAT_R32G32B32A32_FLOAT = 2,
  DXGI_FORMAT_R32G32B32A32_UINT = 3,
  DXGI_FORMAT_R32G32B32A32_SINT = 4,
  DXGI_FORMAT_R32G32B32_TYPELESS = 5,
  DXGI_FORMAT_R32G32B32_FLOAT = 6,
  DXGI_FORMAT_R32G32B32_UINT = 7,
  DXGI_FORMAT_R32G32B32_SINT = 8,
  DXGI_FORMAT_R16G16B16A16_TYPELESS = 9,
  DXGI_FORMAT_R16G16B16A16_FLOAT = 10,
  DXGI_FORMAT_R16G16B16A16_UNORM = 11,
  DXGI_FORMAT_R16G16B16A16_UINT = 12,
  DXGI_FORMAT_R16G16B16A16_SNORM = 13,
  DXGI_FORMAT_R16G16B16A16_SINT = 14,
  DXGI_FORMAT_R32G32_TYPELESS = 15,
  DXGI_FORMAT_R32G32_FLOAT = 16,
  DXGI_FORMAT_R32G32_UINT = 17,
  DXGI_FORMAT_R32G32_SINT = 18,
  DXGI_FORMAT_R32G8X24_TYPELESS = 19,
  DXGI_FORMAT_D32_FLOAT_S8X24_UINT = 20,
  DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS = 21,
  DXGI_FORMAT_X32_TYPELESS_G8X24_UINT = 22,
  DXGI_FORMAT_R10G10B10A2_TYPELESS = 23,
  DXGI_FORMAT_R10G10B10A2_UNORM = 24,
  DXGI_FORMAT_R10G10B10A2_UINT = 25,
  DXGI_FORMAT_R11G11B10_FLOAT = 26,
  DXGI_FORMAT_R8G8B8A8_TYPELESS = 27,
  DXGI_FORMAT_R8G8B8A8_UNORM = 28,
  DXGI_FORMAT_R8G8B8A8_UNORM_SRGB = 29,
  DXGI_FORMAT_R8G8B8A8_UINT = 30,
  DXGI_FORMAT_R8G8B8A8_SNORM = 31,
  DXGI_FORMAT_R8G8B8A8_SINT = 32,
  DXGI_FORMAT_R16G16_TYPELESS = 33,
  DXGI_FORMAT_R16G16_FLOAT = 34,
  DXGI_FORMAT_R16G16_UNORM = 35,
  DXGI_FORMAT_R16G16_UINT = 36,
  DXGI_FORMAT_R16G16_SNORM = 37,
  DXGI_FORMAT_R16G16_SINT = 38,
  DXGI_FORMAT_R32_TYPELESS = 39,
  DXGI_FORMAT_D32_FLOAT = 40,
  DXGI_FORMAT_R32_FLOAT = 41,
  DXGI_FORMAT_R32_UINT = 42,
  DXGI_FORMAT_R32_SINT = 43,
  DXGI_FORMAT_R24G8_TYPELESS = 44,
  DXGI_FORMAT_D24_UNORM_S8_UINT = 45,
  DXGI_FORMAT_R24_UNORM_X8_TYPELESS = 46,
  DXGI_FORMAT_X24_TYPELESS_G8_UINT = 47,
  DXGI_FORMAT_R8G8_TYPELESS = 48,
  DXGI_FORMAT_R8G8_UNORM = 49,
  DXGI_FORMAT_R8G8_UINT = 50,
  DXGI_FORMAT_R8G8_SNORM = 51,
  DXGI_FORMAT_R8G8_SINT = 52,
  DXGI_FORMAT_R16_TYPELESS = 53,
  DXGI_FORMAT_R16_FLOAT = 54,
  DXGI_FORMAT_D16_UNORM = 55,
  DXGI_FORMAT_R16_UNORM = 56,
  DXGI_FORMAT_R16_UINT = 57,
  DXGI_FORMAT_R16_SNORM = 58,
  DXGI_FORMAT_R16_SINT = 59,
  DXGI_FORMAT_R8_TYPELESS = 60,
  DXGI_FORMAT_R8_UNORM = 61,
  DXGI_FORMAT_R8_UINT = 62,
  DXGI_FORMAT_R8_SNORM = 63,
  DXGI_FORMAT_R8_SINT = 64,
  DXGI_FORMAT_A8_UNORM = 65,
  DXGI_FORMAT_R1_UNORM = 66,
  DXGI_FORMAT_R9G9B9E5_SHAREDEXP = 67,
  DXGI_FORMAT_R8G8_B8G8_UNORM = 68,
  DXGI_FORMAT_G8R8_G8B8_UNORM = 69,
  DXGI_FORMAT_BC1_TYPELESS = 70,
  DXGI_FORMAT_BC1_UNORM = 71,
  DXGI_FORMAT_BC1_UNORM_SRGB = 72,
  DXGI_FORMAT_BC2_TYPELESS = 73,
  DXGI_FORMAT_BC2_UNORM = 74,
  DXGI_FORMAT_BC2_UNORM_SRGB = 75,
  DXGI_FORMAT_BC3_TYPELESS = 76,
  DXGI_FORMAT_BC3_UNORM = 77,
  DXGI_FORMAT_BC3_UNORM_SRGB = 78,
  DXGI_FORMAT_BC4_TYPELESS = 79,
  DXGI_FORMAT_BC4_UNORM = 80,
  DXGI_FORMAT_BC4_SNORM = 81,
  DXGI_FORMAT_BC5_TYPELESS = 82,
  DXGI_FORMAT_BC5_UNORM = 83,
  DXGI_FORMAT_BC5_SNORM = 84,
  DXGI_FORMAT_B5G6R5_UNORM = 85,
  DXGI_FORMAT_B5G5R5A1_UNORM = 86,
  DXGI_FORMAT_B8G8R8A8_UNORM = 87,
  DXGI_FORMAT_B8G8R8X8_UNORM = 88,
  DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM = 89,
  DXGI_FORMAT_B8G8R8A8_TYPELESS = 90,
  DXGI_FORMAT_B8G8R8A8_UNORM_SRGB = 91,
  DXGI_FORMAT_B8G8R8X8_TYPELESS = 92,
  DXGI_FORMAT_B8G8R8X8_UNORM_SRGB = 93,
  DXGI_FORMAT_BC6H_TYPELESS = 94,
  DXGI_FORMAT_BC6H_UF16 = 95,
  DXGI_FORMAT_BC6H_SF16 = 96,
  DXGI_FORMAT_BC7_TYPELESS = 97,
  DXGI_FORMAT_BC7_UNORM = 98,
  DXGI_FORMAT_BC7_UNORM_SRGB = 99,
  DXGI_FORMAT_AYUV = 100,
  DXGI_FORMAT_Y410 = 101,
  DXGI_FORMAT_Y416 = 102,
  DXGI_FORMAT_NV12 = 103,
  DXGI_FORMAT_P010 = 104,
  DXGI_FORMAT_P016 = 105,
  DXGI_FORMAT_420_OPAQUE = 106,
  DXGI_FORMAT_YUY2 = 107,
  DXGI_FORMAT_Y210 = 108,
  DXGI_FORMAT_Y216 = 109,
  DXGI_FORMAT_NV11 = 110,
  DXGI_FORMAT_AI44 = 111,
  DXGI_FORMAT_IA44 = 112,
  DXGI_FORMAT_P8 = 113,
  DXGI_FORMAT_A8P8 = 114,
  DXGI_FORMAT_B4G4R4A4_UNORM = 115,
  DXGI_FORMAT_P208 = 130,
  DXGI_FORMAT_V208 = 131,
  DXGI_FORMAT_V408 = 132,
  DXGI_FORMAT_SAMPLER_FEEDBACK_MIN_MIP_OPAQUE = 189,
  DXGI_FORMAT_SAMPLER_FEEDBACK_MIP_REGION_USED_OPAQUE = 190,
  DXGI_FORMAT_FORCE_UINT = 0xffffffff
};

enum D3D10_RESOURCE_DIMENSION {
  D3D10_RESOURCE_DIMENSION_UNKNOWN = 0,
  D3D10_RESOURCE_DIMENSION_BUFFER = 1,
  D3D10_RESOURCE_DIMENSION_TEXTURE1D = 2,
  D3D10_RESOURCE_DIMENSION_TEXTURE2D = 3,
  D3D10_RESOURCE_DIMENSION_TEXTURE3D = 4
};

struct DDS_HEADER_DXT10
{
  DXGI_FORMAT dxgiFormat;
  D3D10_RESOURCE_DIMENSION resourceDimension;
  unsigned int miscFlag;
  unsigned int arraySize;
  unsigned int reserved;
};

#pragma pack(pop)

#endif // _DDS_H
