ShootingGame/DDSTextureLoader.cpp

   1 //--------------------------------------------------------------------------------------
   2 // File: DDSTextureLoader.cpp
   3 //
   4 // Function for loading a DDS texture and creating a Direct3D 11 runtime resource for it
   5 //
   6 // Note this function is useful as a light-weight runtime loader for DDS files. For
   7 // a full-featured DDS file reader, writer, and texture processing pipeline see
   8 // the 'Texconv' sample and the 'DirectXTex' library.
   9 //
  10 // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
  11 // ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
  12 // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
  13 // PARTICULAR PURPOSE.
  14 //
  15 // Copyright (c) Microsoft Corporation. All rights reserved.
  16 //--------------------------------------------------------------------------------------
  17
  18 #include "pch.h"
  19 #include <dxgiformat.h>
  20 #include <assert.h>
  21 #include <memory>
  22 #include <algorithm>
  23 #include "DDSTextureLoader.h"
  24 #include "DirectXSample.h"
  25
  26 using namespace Microsoft::WRL;
  27
  28 //--------------------------------------------------------------------------------------
  29 // Macros
  30 //--------------------------------------------------------------------------------------
  31 #ifndef MAKEFOURCC
  32     #define MAKEFOURCC(ch0, ch1, ch2, ch3)                              \
  33                 ((uint32)(byte)(ch0) | ((uint32)(byte)(ch1) << 8) |       \
  34                 ((uint32)(byte)(ch2) << 16) | ((uint32)(byte)(ch3) << 24))
  35 #endif /* defined(MAKEFOURCC) */
  36
  37 //--------------------------------------------------------------------------------------
  38 // DDS file structure definitions
  39 //
  40 // See DDS.h in the 'Texconv' sample and the 'DirectXTex' library
  41 //--------------------------------------------------------------------------------------
  42 #pragma pack(push, 1)
  43
  44 #define DDS_MAGIC 0x20534444 // "DDS "
  45
  46 struct DDS_PIXELFORMAT
  47 {
  48     uint32  size;
  49     uint32  flags;
  50     uint32  fourCC;
  51     uint32  RGBBitCount;
  52     uint32  RBitMask;
  53     uint32  GBitMask;
  54     uint32  BBitMask;
  55     uint32  ABitMask;
  56 };
  57
  58 #define DDS_FOURCC      0x00000004  // DDPF_FOURCC
  59 #define DDS_RGB         0x00000040  // DDPF_RGB
  60 #define DDS_RGBA        0x00000041  // DDPF_RGB | DDPF_ALPHAPIXELS
  61 #define DDS_LUMINANCE   0x00020000  // DDPF_LUMINANCE
  62 #define DDS_LUMINANCEA  0x00020001  // DDPF_LUMINANCE | DDPF_ALPHAPIXELS
  63 #define DDS_ALPHA       0x00000002  // DDPF_ALPHA
  64 #define DDS_PAL8        0x00000020  // DDPF_PALETTEINDEXED8
  65
  66 #define DDS_HEADER_FLAGS_TEXTURE        0x00001007  // DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT
  67 #define DDS_HEADER_FLAGS_MIPMAP         0x00020000  // DDSD_MIPMAPCOUNT
  68 #define DDS_HEADER_FLAGS_VOLUME         0x00800000  // DDSD_DEPTH
  69 #define DDS_HEADER_FLAGS_PITCH          0x00000008  // DDSD_PITCH
  70 #define DDS_HEADER_FLAGS_LINEARSIZE     0x00080000  // DDSD_LINEARSIZE
  71
  72 #define DDS_HEIGHT 0x00000002 // DDSD_HEIGHT
  73 #define DDS_WIDTH  0x00000004 // DDSD_WIDTH
  74
  75 #define DDS_SURFACE_FLAGS_TEXTURE 0x00001000 // DDSCAPS_TEXTURE
  76 #define DDS_SURFACE_FLAGS_MIPMAP  0x00400008 // DDSCAPS_COMPLEX | DDSCAPS_MIPMAP
  77 #define DDS_SURFACE_FLAGS_CUBEMAP 0x00000008 // DDSCAPS_COMPLEX
  78
  79 #define DDS_CUBEMAP_POSITIVEX 0x00000600 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEX
  80 #define DDS_CUBEMAP_NEGATIVEX 0x00000a00 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEX
  81 #define DDS_CUBEMAP_POSITIVEY 0x00001200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEY
  82 #define DDS_CUBEMAP_NEGATIVEY 0x00002200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEY
  83 #define DDS_CUBEMAP_POSITIVEZ 0x00004200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_POSITIVEZ
  84 #define DDS_CUBEMAP_NEGATIVEZ 0x00008200 // DDSCAPS2_CUBEMAP | DDSCAPS2_CUBEMAP_NEGATIVEZ
  85
  86 #define DDS_CUBEMAP_ALLFACES (DDS_CUBEMAP_POSITIVEX | DDS_CUBEMAP_NEGATIVEX |\
  87                               DDS_CUBEMAP_POSITIVEY | DDS_CUBEMAP_NEGATIVEY |\
  88                               DDS_CUBEMAP_POSITIVEZ | DDS_CUBEMAP_NEGATIVEZ)
  89
  90 #define DDS_CUBEMAP 0x00000200 // DDSCAPS2_CUBEMAP
  91
  92 #define DDS_FLAGS_VOLUME 0x00200000 // DDSCAPS2_VOLUME
  93
  94 typedef struct
  95 {
  96     uint32          size;
  97     uint32          flags;
  98     uint32          height;
  99     uint32          width;
 100     uint32          pitchOrLinearSize;
 101     uint32          depth; // only if DDS_HEADER_FLAGS_VOLUME is set in flags
 102     uint32          mipMapCount;
 103     uint32          reserved1[11];
 104     DDS_PIXELFORMAT ddspf;
 105     uint32          caps;
 106     uint32          caps2;
 107     uint32          caps3;
 108     uint32          caps4;
 109     uint32          reserved2;
 110 } DDS_HEADER;
 111
 112 typedef struct
 113 {
 114     DXGI_FORMAT dxgiFormat;
 115     uint32      resourceDimension;
 116     uint32      miscFlag; // see D3D11_RESOURCE_MISC_FLAG
 117     uint32      arraySize;
 118     uint32      reserved;
 119 } DDS_HEADER_DXT10;
 120
 121 #pragma pack(pop)
 122
 123 //--------------------------------------------------------------------------------------
 124 // Return the BPP for a particular format
 125 //--------------------------------------------------------------------------------------
 126 static size_t BitsPerPixel(_In_ DXGI_FORMAT fmt)
 127 {
 128     switch (fmt)
 129     {
 130     case DXGI_FORMAT_R32G32B32A32_TYPELESS:
 131     case DXGI_FORMAT_R32G32B32A32_FLOAT:
 132     case DXGI_FORMAT_R32G32B32A32_UINT:
 133     case DXGI_FORMAT_R32G32B32A32_SINT:
 134         return 128;
 135
 136     case DXGI_FORMAT_R32G32B32_TYPELESS:
 137     case DXGI_FORMAT_R32G32B32_FLOAT:
 138     case DXGI_FORMAT_R32G32B32_UINT:
 139     case DXGI_FORMAT_R32G32B32_SINT:
 140         return 96;
 141
 142     case DXGI_FORMAT_R16G16B16A16_TYPELESS:
 143     case DXGI_FORMAT_R16G16B16A16_FLOAT:
 144     case DXGI_FORMAT_R16G16B16A16_UNORM:
 145     case DXGI_FORMAT_R16G16B16A16_UINT:
 146     case DXGI_FORMAT_R16G16B16A16_SNORM:
 147     case DXGI_FORMAT_R16G16B16A16_SINT:
 148     case DXGI_FORMAT_R32G32_TYPELESS:
 149     case DXGI_FORMAT_R32G32_FLOAT:
 150     case DXGI_FORMAT_R32G32_UINT:
 151     case DXGI_FORMAT_R32G32_SINT:
 152     case DXGI_FORMAT_R32G8X24_TYPELESS:
 153     case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
 154     case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
 155     case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
 156         return 64;
 157
 158     case DXGI_FORMAT_R10G10B10A2_TYPELESS:
 159     case DXGI_FORMAT_R10G10B10A2_UNORM:
 160     case DXGI_FORMAT_R10G10B10A2_UINT:
 161     case DXGI_FORMAT_R11G11B10_FLOAT:
 162     case DXGI_FORMAT_R8G8B8A8_TYPELESS:
 163     case DXGI_FORMAT_R8G8B8A8_UNORM:
 164     case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
 165     case DXGI_FORMAT_R8G8B8A8_UINT:
 166     case DXGI_FORMAT_R8G8B8A8_SNORM:
 167     case DXGI_FORMAT_R8G8B8A8_SINT:
 168     case DXGI_FORMAT_R16G16_TYPELESS:
 169     case DXGI_FORMAT_R16G16_FLOAT:
 170     case DXGI_FORMAT_R16G16_UNORM:
 171     case DXGI_FORMAT_R16G16_UINT:
 172     case DXGI_FORMAT_R16G16_SNORM:
 173     case DXGI_FORMAT_R16G16_SINT:
 174     case DXGI_FORMAT_R32_TYPELESS:
 175     case DXGI_FORMAT_D32_FLOAT:
 176     case DXGI_FORMAT_R32_FLOAT:
 177     case DXGI_FORMAT_R32_UINT:
 178     case DXGI_FORMAT_R32_SINT:
 179     case DXGI_FORMAT_R24G8_TYPELESS:
 180     case DXGI_FORMAT_D24_UNORM_S8_UINT:
 181     case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
 182     case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
 183     case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
 184     case DXGI_FORMAT_R8G8_B8G8_UNORM:
 185     case DXGI_FORMAT_G8R8_G8B8_UNORM:
 186     case DXGI_FORMAT_B8G8R8A8_UNORM:
 187     case DXGI_FORMAT_B8G8R8X8_UNORM:
 188     case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
 189     case DXGI_FORMAT_B8G8R8A8_TYPELESS:
 190     case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
 191     case DXGI_FORMAT_B8G8R8X8_TYPELESS:
 192     case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
 193         return 32;
 194
 195     case DXGI_FORMAT_R8G8_TYPELESS:
 196     case DXGI_FORMAT_R8G8_UNORM:
 197     case DXGI_FORMAT_R8G8_UINT:
 198     case DXGI_FORMAT_R8G8_SNORM:
 199     case DXGI_FORMAT_R8G8_SINT:
 200     case DXGI_FORMAT_R16_TYPELESS:
 201     case DXGI_FORMAT_R16_FLOAT:
 202     case DXGI_FORMAT_D16_UNORM:
 203     case DXGI_FORMAT_R16_UNORM:
 204     case DXGI_FORMAT_R16_UINT:
 205     case DXGI_FORMAT_R16_SNORM:
 206     case DXGI_FORMAT_R16_SINT:
 207     case DXGI_FORMAT_B5G6R5_UNORM:
 208     case DXGI_FORMAT_B5G5R5A1_UNORM:
 209     case DXGI_FORMAT_B4G4R4A4_UNORM:
 210         return 16;
 211
 212     case DXGI_FORMAT_R8_TYPELESS:
 213     case DXGI_FORMAT_R8_UNORM:
 214     case DXGI_FORMAT_R8_UINT:
 215     case DXGI_FORMAT_R8_SNORM:
 216     case DXGI_FORMAT_R8_SINT:
 217     case DXGI_FORMAT_A8_UNORM:
 218         return 8;
 219
 220     case DXGI_FORMAT_R1_UNORM:
 221         return 1;
 222
 223     case DXGI_FORMAT_BC1_TYPELESS:
 224     case DXGI_FORMAT_BC1_UNORM:
 225     case DXGI_FORMAT_BC1_UNORM_SRGB:
 226     case DXGI_FORMAT_BC4_TYPELESS:
 227     case DXGI_FORMAT_BC4_UNORM:
 228     case DXGI_FORMAT_BC4_SNORM:
 229         return 4;
 230
 231     case DXGI_FORMAT_BC2_TYPELESS:
 232     case DXGI_FORMAT_BC2_UNORM:
 233     case DXGI_FORMAT_BC2_UNORM_SRGB:
 234     case DXGI_FORMAT_BC3_TYPELESS:
 235     case DXGI_FORMAT_BC3_UNORM:
 236     case DXGI_FORMAT_BC3_UNORM_SRGB:
 237     case DXGI_FORMAT_BC5_TYPELESS:
 238     case DXGI_FORMAT_BC5_UNORM:
 239     case DXGI_FORMAT_BC5_SNORM:
 240     case DXGI_FORMAT_BC6H_TYPELESS:
 241     case DXGI_FORMAT_BC6H_UF16:
 242     case DXGI_FORMAT_BC6H_SF16:
 243     case DXGI_FORMAT_BC7_TYPELESS:
 244     case DXGI_FORMAT_BC7_UNORM:
 245     case DXGI_FORMAT_BC7_UNORM_SRGB:
 246         return 8;
 247
 248     default:
 249         return 0;
 250     }
 251 }
 252
 253
 254 //--------------------------------------------------------------------------------------
 255 // Get surface information for a particular format
 256 //--------------------------------------------------------------------------------------
 257 static void GetSurfaceInfo(
 258     _In_ size_t width,
 259     _In_ size_t height,
 260     _In_ DXGI_FORMAT fmt,
 261     _Out_opt_ size_t* outNumBytes,
 262     _Out_opt_ size_t* outRowBytes,
 263     _Out_opt_ size_t* outNumRows
 264     )
 265 {
 266     size_t numBytes = 0;
 267     size_t rowBytes = 0;
 268     size_t numRows = 0;
 269
 270     bool bc = false;
 271     bool packed  = false;
 272     size_t bcnumBytesPerBlock = 0;
 273     switch (fmt)
 274     {
 275     case DXGI_FORMAT_BC1_TYPELESS:
 276     case DXGI_FORMAT_BC1_UNORM:
 277     case DXGI_FORMAT_BC1_UNORM_SRGB:
 278     case DXGI_FORMAT_BC4_TYPELESS:
 279     case DXGI_FORMAT_BC4_UNORM:
 280     case DXGI_FORMAT_BC4_SNORM:
 281         bc = true;
 282         bcnumBytesPerBlock = 8;
 283         break;
 284
 285     case DXGI_FORMAT_BC2_TYPELESS:
 286     case DXGI_FORMAT_BC2_UNORM:
 287     case DXGI_FORMAT_BC2_UNORM_SRGB:
 288     case DXGI_FORMAT_BC3_TYPELESS:
 289     case DXGI_FORMAT_BC3_UNORM:
 290     case DXGI_FORMAT_BC3_UNORM_SRGB:
 291     case DXGI_FORMAT_BC5_TYPELESS:
 292     case DXGI_FORMAT_BC5_UNORM:
 293     case DXGI_FORMAT_BC5_SNORM:
 294     case DXGI_FORMAT_BC6H_TYPELESS:
 295     case DXGI_FORMAT_BC6H_UF16:
 296     case DXGI_FORMAT_BC6H_SF16:
 297     case DXGI_FORMAT_BC7_TYPELESS:
 298     case DXGI_FORMAT_BC7_UNORM:
 299     case DXGI_FORMAT_BC7_UNORM_SRGB:
 300         bc = true;
 301         bcnumBytesPerBlock = 16;
 302         break;
 303
 304     case DXGI_FORMAT_R8G8_B8G8_UNORM:
 305     case DXGI_FORMAT_G8R8_G8B8_UNORM:
 306         packed = true;
 307         break;
 308     }
 309
 310     if (bc)
 311     {
 312         size_t numBlocksWide = 0;
 313         if (width > 0)
 314         {
 315             numBlocksWide = std::max<size_t>(1, (width + 3) / 4);
 316         }
 317         size_t numBlocksHigh = 0;
 318         if (height > 0)
 319         {
 320             numBlocksHigh = std::max<size_t>(1, (height + 3) / 4);
 321         }
 322         rowBytes = numBlocksWide * bcnumBytesPerBlock;
 323         numRows = numBlocksHigh;
 324     }
 325     else if (packed)
 326     {
 327         rowBytes = ((width + 1) >> 1) * 4;
 328         numRows = height;
 329     }
 330     else
 331     {
 332         size_t bpp = BitsPerPixel(fmt);
 333         rowBytes = (width * bpp + 7) / 8; // round up to nearest byte
 334         numRows = height;
 335     }
 336
 337     numBytes = rowBytes * numRows;
 338     if (outNumBytes)
 339     {
 340         *outNumBytes = numBytes;
 341     }
 342     if (outRowBytes)
 343     {
 344         *outRowBytes = rowBytes;
 345     }
 346     if (outNumRows)
 347     {
 348         *outNumRows = numRows;
 349     }
 350 }
 351
 352
 353 //--------------------------------------------------------------------------------------
 354 #define ISBITMASK(r, g, b, a) (ddpf.RBitMask == r && ddpf.GBitMask == g && ddpf.BBitMask == b && ddpf.ABitMask == a)
 355
 356 static DXGI_FORMAT GetDXGIFormat(const DDS_PIXELFORMAT& ddpf)
 357 {
 358     if (ddpf.flags & DDS_RGB)
 359     {
 360         // Note that sRGB formats are written using the "DX10" extended header
 361
 362         switch (ddpf.RGBBitCount)
 363         {
 364         case 32:
 365             if (ISBITMASK(0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000))
 366             {
 367                 return DXGI_FORMAT_R8G8B8A8_UNORM;
 368             }
 369
 370             if (ISBITMASK(0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000))
 371             {
 372                 return DXGI_FORMAT_B8G8R8A8_UNORM;
 373             }
 374
 375             if (ISBITMASK(0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000))
 376             {
 377                 return DXGI_FORMAT_B8G8R8X8_UNORM;
 378             }
 379
 380             // No DXGI format maps to ISBITMASK(0x000000ff, 0x0000ff00, 0x00ff0000, 0x00000000) aka D3DFMT_X8B8G8R8
 381
 382             // Note that many common DDS reader/writers (including D3DX) swap the
 383             // the RED/BLUE masks for 10:10:10:2 formats. We assumme
 384             // below that the 'backwards' header mask is being used since it is most
 385             // likely written by D3DX. The more robust solution is to use the 'DX10'
 386             // header extension and specify the DXGI_FORMAT_R10G10B10A2_UNORM format directly
 387
 388             // For 'correct' writers, this should be 0x000003ff, 0x000ffc00, 0x3ff00000 for RGB data
 389             if (ISBITMASK(0x3ff00000, 0x000ffc00, 0x000003ff, 0xc0000000))
 390             {
 391                 return DXGI_FORMAT_R10G10B10A2_UNORM;
 392             }
 393
 394             // No DXGI format maps to ISBITMASK(0x000003ff, 0x000ffc00, 0x3ff00000, 0xc0000000) aka D3DFMT_A2R10G10B10
 395
 396             if (ISBITMASK(0x0000ffff, 0xffff0000, 0x00000000, 0x00000000))
 397             {
 398                 return DXGI_FORMAT_R16G16_UNORM;
 399             }
 400
 401             if (ISBITMASK(0xffffffff, 0x00000000, 0x00000000, 0x00000000))
 402             {
 403                 // Only 32-bit color channel format in D3D9 was R32F
 404                 return DXGI_FORMAT_R32_FLOAT; // D3DX writes this out as a FourCC of 114
 405             }
 406             break;
 407
 408         case 24:
 409             // No 24bpp DXGI formats aka D3DFMT_R8G8B8
 410             break;
 411
 412         case 16:
 413             if (ISBITMASK(0x7c00, 0x03e0, 0x001f, 0x8000))
 414             {
 415                 return DXGI_FORMAT_B5G5R5A1_UNORM;
 416             }
 417             if (ISBITMASK(0xf800, 0x07e0, 0x001f, 0x0000))
 418             {
 419                 return DXGI_FORMAT_B5G6R5_UNORM;
 420             }
 421
 422             // No DXGI format maps to ISBITMASK(0x7c00, 0x03e0, 0x001f, 0x0000) aka D3DFMT_X1R5G5B5
 423             if (ISBITMASK(0x0f00, 0x00f0, 0x000f, 0xf000))
 424             {
 425                 return DXGI_FORMAT_B4G4R4A4_UNORM;
 426             }
 427
 428             // No DXGI format maps to ISBITMASK(0x0f00, 0x00f0, 0x000f, 0x0000) aka D3DFMT_X4R4G4B4
 429
 430             // No 3:3:2, 3:3:2:8, or paletted DXGI formats aka D3DFMT_A8R3G3B2, D3DFMT_R3G3B2, D3DFMT_P8, D3DFMT_A8P8, etc.
 431             break;
 432         }
 433     }
 434     else if (ddpf.flags & DDS_LUMINANCE)
 435     {
 436         if (8 == ddpf.RGBBitCount)
 437         {
 438             if (ISBITMASK(0x000000ff, 0x00000000, 0x00000000, 0x00000000))
 439             {
 440                 return DXGI_FORMAT_R8_UNORM; // D3DX10/11 writes this out as DX10 extension
 441             }
 442
 443             // No DXGI format maps to ISBITMASK(0x0f, 0x00, 0x00, 0xf0) aka D3DFMT_A4L4
 444         }
 445
 446         if (16 == ddpf.RGBBitCount)
 447         {
 448             if (ISBITMASK(0x0000ffff, 0x00000000, 0x00000000, 0x00000000))
 449             {
 450                 return DXGI_FORMAT_R16_UNORM; // D3DX10/11 writes this out as DX10 extension
 451             }
 452             if (ISBITMASK(0x000000ff, 0x00000000, 0x00000000, 0x0000ff00))
 453             {
 454                 return DXGI_FORMAT_R8G8_UNORM; // D3DX10/11 writes this out as DX10 extension
 455             }
 456         }
 457     }
 458     else if (ddpf.flags & DDS_ALPHA)
 459     {
 460         if (8 == ddpf.RGBBitCount)
 461         {
 462             return DXGI_FORMAT_A8_UNORM;
 463         }
 464     }
 465     else if (ddpf.flags & DDS_FOURCC)
 466     {
 467         if (MAKEFOURCC('D', 'X', 'T', '1') == ddpf.fourCC)
 468         {
 469             return DXGI_FORMAT_BC1_UNORM;
 470         }
 471         if (MAKEFOURCC('D', 'X', 'T', '3') == ddpf.fourCC)
 472         {
 473             return DXGI_FORMAT_BC2_UNORM;
 474         }
 475         if (MAKEFOURCC('D', 'X', 'T', '5') == ddpf.fourCC)
 476         {
 477             return DXGI_FORMAT_BC3_UNORM;
 478         }
 479
 480         // While pre-mulitplied alpha isn't directly supported by the DXGI formats,
 481         // they are basically the same as these BC formats so they can be mapped
 482         if (MAKEFOURCC('D', 'X', 'T', '2') == ddpf.fourCC)
 483         {
 484             return DXGI_FORMAT_BC2_UNORM;
 485         }
 486         if (MAKEFOURCC('D', 'X', 'T', '4') == ddpf.fourCC)
 487         {
 488             return DXGI_FORMAT_BC3_UNORM;
 489         }
 490
 491         if (MAKEFOURCC('A', 'T', 'I', '1') == ddpf.fourCC)
 492         {
 493             return DXGI_FORMAT_BC4_UNORM;
 494         }
 495         if (MAKEFOURCC('B', 'C', '4', 'U') == ddpf.fourCC)
 496         {
 497             return DXGI_FORMAT_BC4_UNORM;
 498         }
 499         if (MAKEFOURCC('B', 'C', '4', 'S') == ddpf.fourCC)
 500         {
 501             return DXGI_FORMAT_BC4_SNORM;
 502         }
 503
 504         if (MAKEFOURCC('A', 'T', 'I', '2') == ddpf.fourCC)
 505         {
 506             return DXGI_FORMAT_BC5_UNORM;
 507         }
 508         if (MAKEFOURCC('B', 'C', '5', 'U') == ddpf.fourCC)
 509         {
 510             return DXGI_FORMAT_BC5_UNORM;
 511         }
 512         if (MAKEFOURCC('B', 'C', '5', 'S') == ddpf.fourCC)
 513         {
 514             return DXGI_FORMAT_BC5_SNORM;
 515         }
 516
 517         // BC6H and BC7 are written using the "DX10" extended header
 518
 519         if (MAKEFOURCC('R', 'G', 'B', 'G') == ddpf.fourCC)
 520         {
 521             return DXGI_FORMAT_R8G8_B8G8_UNORM;
 522         }
 523         if (MAKEFOURCC('G', 'R', 'G', 'B') == ddpf.fourCC)
 524         {
 525             return DXGI_FORMAT_G8R8_G8B8_UNORM;
 526         }
 527
 528         // Check for D3DFORMAT enums being set here
 529         switch (ddpf.fourCC)
 530         {
 531         case 36: // D3DFMT_A16B16G16R16
 532             return DXGI_FORMAT_R16G16B16A16_UNORM;
 533
 534         case 110: // D3DFMT_Q16W16V16U16
 535             return DXGI_FORMAT_R16G16B16A16_SNORM;
 536
 537         case 111: // D3DFMT_R16F
 538             return DXGI_FORMAT_R16_FLOAT;
 539
 540         case 112: // D3DFMT_G16R16F
 541             return DXGI_FORMAT_R16G16_FLOAT;
 542
 543         case 113: // D3DFMT_A16B16G16R16F
 544             return DXGI_FORMAT_R16G16B16A16_FLOAT;
 545
 546         case 114: // D3DFMT_R32F
 547             return DXGI_FORMAT_R32_FLOAT;
 548
 549         case 115: // D3DFMT_G32R32F
 550             return DXGI_FORMAT_R32G32_FLOAT;
 551
 552         case 116: // D3DFMT_A32B32G32R32F
 553             return DXGI_FORMAT_R32G32B32A32_FLOAT;
 554         }
 555     }
 556
 557     return DXGI_FORMAT_UNKNOWN;
 558 }
 559
 560
 561 //--------------------------------------------------------------------------------------
 562 static void FillInitData(
 563     _In_ size_t width,
 564     _In_ size_t height,
 565     _In_ size_t depth,
 566     _In_ size_t mipCount,
 567     _In_ size_t arraySize,
 568     _In_ DXGI_FORMAT format,
 569     _In_ size_t maxsize,
 570     _In_ size_t bitSize,
 571     _In_reads_bytes_(bitSize) const byte* bitData,
 572     _Out_ size_t& twidth,
 573     _Out_ size_t& theight,
 574     _Out_ size_t& tdepth,
 575     _Out_ size_t& skipMip,
 576     _Out_writes_(mipCount*arraySize) D3D11_SUBRESOURCE_DATA* initData
 577     )
 578 {
 579     if (!bitData || !initData)
 580     {
 581         throw ref new Platform::InvalidArgumentException();
 582     }
 583
 584     skipMip = 0;
 585     twidth = 0;
 586     theight = 0;
 587     tdepth = 0;
 588
 589     size_t NumBytes = 0;
 590     size_t RowBytes = 0;
 591     size_t NumRows = 0;
 592     const byte* pSrcBits = bitData;
 593     const byte* pEndBits = bitData + bitSize;
 594
 595     size_t index = 0;
 596     for (size_t j = 0; j < arraySize; j++)
 597     {
 598         size_t w = width;
 599         size_t h = height;
 600         size_t d = depth;
 601         for (size_t i = 0; i < mipCount; i++)
 602         {
 603             GetSurfaceInfo(w, h, format, &NumBytes, &RowBytes, &NumRows);
 604
 605             if ((mipCount <= 1) || !maxsize || (w <= maxsize && h <= maxsize && d <= maxsize))
 606             {
 607                 if (!twidth)
 608                 {
 609                     twidth = w;
 610                     theight = h;
 611                     tdepth = d;
 612                 }
 613
 614                 initData[index].pSysMem = (const void*)pSrcBits;
 615                 initData[index].SysMemPitch = static_cast<UINT>(RowBytes);
 616                 initData[index].SysMemSlicePitch = static_cast<UINT>(NumBytes);
 617                 ++index;
 618             }
 619             else
 620             {
 621                 ++skipMip;
 622             }
 623
 624             if (pSrcBits + (NumBytes*d) > pEndBits)
 625             {
 626                 throw ref new Platform::OutOfBoundsException();
 627             }
 628
 629             pSrcBits += NumBytes * d;
 630
 631             w = w >> 1;
 632             h = h >> 1;
 633             d = d >> 1;
 634             if (w == 0)
 635             {
 636                 w = 1;
 637             }
 638             if (h == 0)
 639             {
 640                 h = 1;
 641             }
 642             if (d == 0)
 643             {
 644                 d = 1;
 645             }
 646         }
 647     }
 648
 649     if (!index)
 650     {
 651         throw ref new Platform::FailureException();
 652     }
 653 }
 654
 655
 656 //--------------------------------------------------------------------------------------
 657 static HRESULT CreateD3DResources(
 658     _In_ ID3D11Device* d3dDevice,
 659     _In_ uint32 resDim,
 660     _In_ size_t width,
 661     _In_ size_t height,
 662     _In_ size_t depth,
 663     _In_ size_t mipCount,
 664     _In_ size_t arraySize,
 665     _In_ DXGI_FORMAT format,
 666     _In_ bool isCubeMap,
 667     _In_reads_(mipCount*arraySize) D3D11_SUBRESOURCE_DATA* initData,
 668     _Out_opt_ ID3D11Resource** texture,
 669     _Out_opt_ ID3D11ShaderResourceView** textureView
 670     )
 671 {
 672     if (!d3dDevice || !initData)
 673     {
 674         return E_INVALIDARG;
 675     }
 676
 677     HRESULT hr = E_FAIL;
 678
 679     switch (resDim)
 680     {
 681         case D3D11_RESOURCE_DIMENSION_TEXTURE1D:
 682             {
 683                 D3D11_TEXTURE1D_DESC desc;
 684                 desc.Width = static_cast<UINT>(width);
 685                 desc.MipLevels = static_cast<UINT>(mipCount);
 686                 desc.ArraySize = static_cast<UINT>(arraySize);
 687                 desc.Format = format;
 688                 desc.Usage = D3D11_USAGE_DEFAULT;
 689                 desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
 690                 desc.CPUAccessFlags = 0;
 691                 desc.MiscFlags = 0;
 692
 693                 ID3D11Texture1D* tex = nullptr;
 694                 hr = d3dDevice->CreateTexture1D(&desc, initData, &tex);
 695
 696                 if (SUCCEEDED(hr) && tex != 0)
 697                 {
 698                     if (textureView != 0)
 699                     {
 700                         D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc;
 701                         memset(&SRVDesc, 0, sizeof(SRVDesc));
 702                         SRVDesc.Format = format;
 703
 704                         if (arraySize > 1)
 705                         {
 706                             SRVDesc.ViewDimension = D3D_SRV_DIMENSION_TEXTURE1DARRAY;
 707                             SRVDesc.Texture1DArray.MipLevels = desc.MipLevels;
 708                             SRVDesc.Texture1DArray.ArraySize = static_cast<UINT>(arraySize);
 709                         }
 710                         else
 711                         {
 712                             SRVDesc.ViewDimension = D3D_SRV_DIMENSION_TEXTURE1D;
 713                             SRVDesc.Texture1D.MipLevels = desc.MipLevels;
 714                         }
 715
 716                         hr = d3dDevice->CreateShaderResourceView(tex, &SRVDesc, textureView);
 717
 718                         if (FAILED(hr))
 719                         {
 720                             tex->Release();
 721                             return hr;
 722                         }
 723                     }
 724
 725                     if (texture != 0)
 726                     {
 727                         *texture = tex;
 728                     }
 729                     else
 730                     {
 731                         tex->Release();
 732                     }
 733                 }
 734             }
 735             break;
 736
 737         case D3D11_RESOURCE_DIMENSION_TEXTURE2D:
 738             {
 739                 D3D11_TEXTURE2D_DESC desc;
 740                 desc.Width = static_cast<UINT>(width);
 741                 desc.Height = static_cast<UINT>(height);
 742                 desc.MipLevels = static_cast<UINT>(mipCount);
 743                 desc.ArraySize = static_cast<UINT>(arraySize);
 744                 desc.Format = format;
 745                 desc.SampleDesc.Count = 1;
 746                 desc.SampleDesc.Quality = 0;
 747                 desc.Usage = D3D11_USAGE_DEFAULT;
 748                 desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
 749                 desc.CPUAccessFlags = 0;
 750                 desc.MiscFlags = (isCubeMap) ? D3D11_RESOURCE_MISC_TEXTURECUBE : 0;
 751
 752                 ID3D11Texture2D* tex = nullptr;
 753                 hr = d3dDevice->CreateTexture2D(&desc, initData, &tex);
 754
 755                 if (SUCCEEDED(hr) && tex != 0)
 756                 {
 757                     if (textureView != 0)
 758                     {
 759                         D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc;
 760                         memset(&SRVDesc, 0, sizeof(SRVDesc));
 761                         SRVDesc.Format = format;
 762
 763                         if (isCubeMap)
 764                         {
 765                             if (arraySize > 6)
 766                             {
 767                                 SRVDesc.ViewDimension = D3D_SRV_DIMENSION_TEXTURECUBEARRAY;
 768                                 SRVDesc.TextureCubeArray.MipLevels = desc.MipLevels;
 769
 770                                 // Earlier we set arraySize to (NumCubes * 6)
 771                                 SRVDesc.TextureCubeArray.NumCubes = static_cast<UINT>(arraySize / 6);
 772                             }
 773                             else
 774                             {
 775                                 SRVDesc.ViewDimension = D3D_SRV_DIMENSION_TEXTURECUBE;
 776                                 SRVDesc.TextureCube.MipLevels = desc.MipLevels;
 777                             }
 778                         }
 779                         else if (arraySize > 1)
 780                         {
 781                             SRVDesc.ViewDimension = D3D_SRV_DIMENSION_TEXTURE2DARRAY;
 782                             SRVDesc.Texture2DArray.MipLevels = desc.MipLevels;
 783                             SRVDesc.Texture2DArray.ArraySize = static_cast<UINT>(arraySize);
 784                         }
 785                         else
 786                         {
 787                             SRVDesc.ViewDimension = D3D_SRV_DIMENSION_TEXTURE2D;
 788                             SRVDesc.Texture2D.MipLevels = desc.MipLevels;
 789                         }
 790
 791                         hr = d3dDevice->CreateShaderResourceView(tex, &SRVDesc, textureView);
 792
 793                         if (FAILED(hr))
 794                         {
 795                             tex->Release();
 796                             return hr;
 797                         }
 798                     }
 799
 800                     if (texture != 0)
 801                     {
 802                         *texture = tex;
 803                     }
 804                     else
 805                     {
 806                         tex->Release();
 807                     }
 808                 }
 809             }
 810             break;
 811
 812         case D3D11_RESOURCE_DIMENSION_TEXTURE3D:
 813             {
 814                 D3D11_TEXTURE3D_DESC desc;
 815                 desc.Width = static_cast<UINT>(width);
 816                 desc.Height = static_cast<UINT>(height);
 817                 desc.Depth = static_cast<UINT>(depth);
 818                 desc.MipLevels = static_cast<UINT>(mipCount);
 819                 desc.Format = format;
 820                 desc.Usage = D3D11_USAGE_DEFAULT;
 821                 desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
 822                 desc.CPUAccessFlags = 0;
 823                 desc.MiscFlags = 0;
 824
 825                 ID3D11Texture3D* tex = nullptr;
 826                 hr = d3dDevice->CreateTexture3D(&desc, initData, &tex);
 827
 828                 if (SUCCEEDED(hr) && tex != 0)
 829                 {
 830                     if (textureView != 0)
 831                     {
 832                         D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc;
 833                         memset(&SRVDesc, 0, sizeof(SRVDesc));
 834                         SRVDesc.Format = format;
 835                         SRVDesc.ViewDimension = D3D_SRV_DIMENSION_TEXTURE3D;
 836                         SRVDesc.Texture3D.MipLevels = desc.MipLevels;
 837
 838                         hr = d3dDevice->CreateShaderResourceView(tex, &SRVDesc, textureView);
 839
 840                         if (FAILED(hr))
 841                         {
 842                             tex->Release();
 843                             return hr;
 844                         }
 845                     }
 846
 847                     if (texture != 0)
 848                     {
 849                         *texture = tex;
 850                     }
 851                     else
 852                     {
 853                         tex->Release();
 854                     }
 855                 }
 856             }
 857             break;
 858     }
 859
 860     return hr;
 861 }
 862
 863
 864 //--------------------------------------------------------------------------------------
 865 static void CreateTextureFromDDS(
 866     _In_ ID3D11Device* d3dDevice,
 867     _In_ const DDS_HEADER* header,
 868     _In_reads_bytes_(bitSize) const byte* bitData,
 869     _In_ size_t bitSize,
 870     _Out_opt_ ID3D11Resource** texture,
 871     _Out_opt_ ID3D11ShaderResourceView** textureView,
 872     _In_ size_t maxsize
 873     )
 874 {
 875     HRESULT hr = S_OK;
 876
 877     size_t width = header->width;
 878     size_t height = header->height;
 879     size_t depth = header->depth;
 880
 881     uint32 resDim = D3D11_RESOURCE_DIMENSION_UNKNOWN;
 882     size_t arraySize = 1;
 883     DXGI_FORMAT format = DXGI_FORMAT_UNKNOWN;
 884     bool isCubeMap = false;
 885
 886     size_t mipCount = header->mipMapCount;
 887     if (0 == mipCount)
 888     {
 889         mipCount = 1;
 890     }
 891
 892     if ((header->ddspf.flags & DDS_FOURCC) &&
 893         (MAKEFOURCC('D', 'X', '1', '0') == header->ddspf.fourCC))
 894     {
 895         const DDS_HEADER_DXT10* d3d10ext = reinterpret_cast<const DDS_HEADER_DXT10*>((const char*)header + sizeof(DDS_HEADER));
 896
 897         arraySize = d3d10ext->arraySize;
 898         if (arraySize == 0)
 899         {
 900             throw ref new Platform::FailureException();
 901         }
 902
 903         if (BitsPerPixel(d3d10ext->dxgiFormat) == 0)
 904         {
 905             throw ref new Platform::FailureException();
 906         }
 907
 908         format = d3d10ext->dxgiFormat;
 909
 910         switch (d3d10ext->resourceDimension)
 911         {
 912         case D3D11_RESOURCE_DIMENSION_TEXTURE1D:
 913             // D3DX writes 1D textures with a fixed Height of 1
 914             if ((header->flags & DDS_HEIGHT) && height != 1)
 915             {
 916                 throw ref new Platform::FailureException();
 917             }
 918             height = depth = 1;
 919             break;
 920
 921         case D3D11_RESOURCE_DIMENSION_TEXTURE2D:
 922             if (d3d10ext->miscFlag & D3D11_RESOURCE_MISC_TEXTURECUBE)
 923             {
 924                 arraySize *= 6;
 925                 isCubeMap = true;
 926             }
 927             depth = 1;
 928             break;
 929
 930         case D3D11_RESOURCE_DIMENSION_TEXTURE3D:
 931             if (!(header->flags & DDS_HEADER_FLAGS_VOLUME))
 932             {
 933                 throw ref new Platform::FailureException();
 934             }
 935
 936             if (arraySize > 1)
 937             {
 938                 throw ref new Platform::FailureException();
 939             }
 940             break;
 941
 942         default:
 943             return throw ref new Platform::FailureException();
 944         }
 945
 946         resDim = d3d10ext->resourceDimension;
 947     }
 948     else
 949     {
 950         format = GetDXGIFormat(header->ddspf);
 951
 952         if (format == DXGI_FORMAT_UNKNOWN)
 953         {
 954            return throw ref new Platform::FailureException();
 955         }
 956
 957         if (header->flags & DDS_HEADER_FLAGS_VOLUME)
 958         {
 959             resDim = D3D11_RESOURCE_DIMENSION_TEXTURE3D;
 960         }
 961         else
 962         {
 963             if (header->caps2 & DDS_CUBEMAP)
 964             {
 965                 // We require all six faces to be defined
 966                 if ((header->caps2 & DDS_CUBEMAP_ALLFACES) != DDS_CUBEMAP_ALLFACES)
 967                 {
 968                     return throw ref new Platform::FailureException();
 969                 }
 970
 971                 arraySize = 6;
 972                 isCubeMap = true;
 973             }
 974
 975             depth = 1;
 976             resDim = D3D11_RESOURCE_DIMENSION_TEXTURE2D;
 977
 978             // Note there's no way for a legacy Direct3D 9 DDS to express a '1D' texture
 979         }
 980
 981         assert(BitsPerPixel(format) != 0);
 982     }
 983
 984     // Bound sizes (for security purposes we don't trust DDS file metadata larger than the D3D 11.x hardware requirements)
 985     if (mipCount > D3D11_REQ_MIP_LEVELS)
 986     {
 987         return throw ref new Platform::FailureException();
 988     }
 989
 990     switch (resDim)
 991     {
 992         case D3D11_RESOURCE_DIMENSION_TEXTURE1D:
 993             if ((arraySize > D3D11_REQ_TEXTURE1D_ARRAY_AXIS_DIMENSION) ||
 994                 (width > D3D11_REQ_TEXTURE1D_U_DIMENSION))
 995             {
 996                 return throw ref new Platform::FailureException();
 997             }
 998             break;
 999
1000         case D3D11_RESOURCE_DIMENSION_TEXTURE2D:
1001             if (isCubeMap)
1002             {
1003                 // This is the right bound because we set arraySize to (NumCubes*6) above
1004                 if ((arraySize > D3D11_REQ_TEXTURE2D_ARRAY_AXIS_DIMENSION) ||
1005                     (width > D3D11_REQ_TEXTURECUBE_DIMENSION) ||
1006                     (height > D3D11_REQ_TEXTURECUBE_DIMENSION))
1007                 {
1008                     return throw ref new Platform::FailureException();
1009                 }
1010             }
1011             else if ((arraySize > D3D11_REQ_TEXTURE2D_ARRAY_AXIS_DIMENSION) ||
1012                      (width > D3D11_REQ_TEXTURE2D_U_OR_V_DIMENSION) ||
1013                      (height > D3D11_REQ_TEXTURE2D_U_OR_V_DIMENSION))
1014             {
1015                 return throw ref new Platform::FailureException();
1016             }
1017             break;
1018
1019         case D3D11_RESOURCE_DIMENSION_TEXTURE3D:
1020             if ((arraySize > 1) ||
1021                 (width > D3D11_REQ_TEXTURE3D_U_V_OR_W_DIMENSION) ||
1022                 (height > D3D11_REQ_TEXTURE3D_U_V_OR_W_DIMENSION) ||
1023                 (depth > D3D11_REQ_TEXTURE3D_U_V_OR_W_DIMENSION))
1024             {
1025                 return throw ref new Platform::FailureException();
1026             }
1027             break;
1028     }
1029
1030     // Create the texture
1031     std::unique_ptr<D3D11_SUBRESOURCE_DATA> initData(new D3D11_SUBRESOURCE_DATA[mipCount * arraySize]);
1032
1033     size_t skipMip = 0;
1034     size_t twidth = 0;
1035     size_t theight = 0;
1036     size_t tdepth = 0;
1037     FillInitData(width, height, depth, mipCount, arraySize, format, maxsize, bitSize, bitData, twidth, theight, tdepth, skipMip, initData.get());
1038
1039     hr = CreateD3DResources(d3dDevice, resDim, twidth, theight, tdepth, mipCount - skipMip, arraySize, format, isCubeMap, initData.get(), texture, textureView);
1040
1041     if (FAILED(hr) && !maxsize && (mipCount > 1))
1042     {
1043         // Retry with a maxsize determined by feature level
1044         switch (d3dDevice->GetFeatureLevel())
1045         {
1046         case D3D_FEATURE_LEVEL_9_1:
1047         case D3D_FEATURE_LEVEL_9_2:
1048             if (isCubeMap)
1049             {
1050                 maxsize = D3D_FL9_1_REQ_TEXTURECUBE_DIMENSION;
1051             }
1052             else
1053             {
1054                 maxsize = (resDim == D3D11_RESOURCE_DIMENSION_TEXTURE3D)
1055                           ? D3D_FL9_1_REQ_TEXTURE3D_U_V_OR_W_DIMENSION
1056                           : D3D_FL9_1_REQ_TEXTURE2D_U_OR_V_DIMENSION;
1057             }
1058             break;
1059
1060         case D3D_FEATURE_LEVEL_9_3:
1061             maxsize = (resDim == D3D11_RESOURCE_DIMENSION_TEXTURE3D)
1062                       ? D3D_FL9_1_REQ_TEXTURE3D_U_V_OR_W_DIMENSION
1063                       : D3D_FL9_3_REQ_TEXTURE2D_U_OR_V_DIMENSION;
1064             break;
1065
1066         default: // D3D_FEATURE_LEVEL_10_0 & D3D_FEATURE_LEVEL_10_1
1067             maxsize = (resDim == D3D11_RESOURCE_DIMENSION_TEXTURE3D)
1068                       ? D3D10_REQ_TEXTURE3D_U_V_OR_W_DIMENSION
1069                       : D3D10_REQ_TEXTURE2D_U_OR_V_DIMENSION;
1070             break;
1071         }
1072
1073         FillInitData(width, height, depth, mipCount, arraySize, format, maxsize, bitSize, bitData, twidth, theight, tdepth, skipMip, initData.get());
1074
1075         hr = CreateD3DResources(d3dDevice, resDim, twidth, theight, tdepth, mipCount - skipMip, arraySize, format, isCubeMap, initData.get(), texture, textureView);
1076     }
1077
1078     DX::ThrowIfFailed(hr);
1079 }
1080
1081 //--------------------------------------------------------------------------------------
1082 void CreateDDSTextureFromMemory(
1083     _In_ ID3D11Device* d3dDevice,
1084     _In_reads_bytes_(ddsDataSize) const byte* ddsData,
1085     _In_ size_t ddsDataSize,
1086     _Out_opt_ ID3D11Resource** texture,
1087     _Out_opt_ ID3D11ShaderResourceView** textureView,
1088     _In_ size_t maxsize
1089     )
1090 {
1091     if (!d3dDevice || !ddsData || (!texture && !textureView))
1092     {
1093         throw ref new Platform::InvalidArgumentException();
1094     }
1095
1096     // Validate DDS file in memory
1097     if (ddsDataSize < (sizeof(uint32) + sizeof(DDS_HEADER)))
1098     {
1099         throw ref new Platform::FailureException();
1100     }
1101
1102     uint32 dwMagicNumber = *(const uint32*)(ddsData);
1103     if (dwMagicNumber != DDS_MAGIC)
1104     {
1105         throw ref new Platform::FailureException();
1106     }
1107
1108     const DDS_HEADER* header = reinterpret_cast<const DDS_HEADER*>(ddsData + sizeof(uint32));
1109
1110     // Verify header to validate DDS file
1111     if (header->size != sizeof(DDS_HEADER) ||
1112         header->ddspf.size != sizeof(DDS_PIXELFORMAT))
1113     {
1114         throw ref new Platform::FailureException();
1115     }
1116
1117     // Check for DX10 extension
1118     bool bDXT10Header = false;
1119     if ((header->ddspf.flags & DDS_FOURCC) &&
1120         (MAKEFOURCC('D', 'X', '1', '0') == header->ddspf.fourCC))
1121     {
1122         // Must be long enough for both headers and magic value
1123         if (ddsDataSize < (sizeof(DDS_HEADER) + sizeof(uint32) + sizeof(DDS_HEADER_DXT10)))
1124         {
1125             throw ref new Platform::FailureException();
1126         }
1127
1128         bDXT10Header = true;
1129     }
1130
1131     ptrdiff_t offset = sizeof(uint32)
1132                        + sizeof(DDS_HEADER)
1133                        + (bDXT10Header ? sizeof(DDS_HEADER_DXT10) : 0);
1134
1135     CreateTextureFromDDS(d3dDevice, header, ddsData + offset, ddsDataSize - offset, texture, textureView, maxsize);
1136 }