| 304 | } |
| 305 | |
| 306 | static RefCntAutoPtr<Image> CreateDefaultImage(const pxr::TfToken& Name, Uint32 Dimension = 64) |
| 307 | { |
| 308 | ImageDesc ImgDesc; |
| 309 | ImgDesc.Width = Dimension; |
| 310 | ImgDesc.Height = Dimension; |
| 311 | ImgDesc.ComponentType = VT_UINT8; |
| 312 | RefCntAutoPtr<IDataBlob> pData; |
| 313 | |
| 314 | auto InitData = [&](Uint32 NumComponents, int Value) { |
| 315 | ImgDesc.NumComponents = NumComponents; |
| 316 | ImgDesc.RowStride = ImgDesc.Width * ImgDesc.NumComponents; |
| 317 | pData = DataBlobImpl::Create(size_t{ImgDesc.RowStride} * size_t{ImgDesc.Height}); |
| 318 | if (Value >= 0) |
| 319 | { |
| 320 | memset(pData->GetDataPtr(), Value, pData->GetSize()); |
| 321 | } |
| 322 | }; |
| 323 | |
| 324 | if (Name == HnMaterialPrivateTokens->whiteRgba8) |
| 325 | { |
| 326 | InitData(4, 255); |
| 327 | } |
| 328 | else if (Name == HnMaterialPrivateTokens->blackRgba8) |
| 329 | { |
| 330 | InitData(4, 0); |
| 331 | } |
| 332 | else if (Name == HnMaterialPrivateTokens->whiteR8) |
| 333 | { |
| 334 | InitData(1, 255); |
| 335 | } |
| 336 | else if (Name == HnTokens->normal) |
| 337 | { |
| 338 | InitData(4, -1); |
| 339 | |
| 340 | Uint8* pDst = reinterpret_cast<Uint8*>(pData->GetDataPtr()); |
| 341 | for (size_t i = 0; i < pData->GetSize(); i += 4) |
| 342 | { |
| 343 | pDst[i + 0] = 128; |
| 344 | pDst[i + 1] = 128; |
| 345 | pDst[i + 2] = 255; |
| 346 | pDst[i + 3] = 0; |
| 347 | } |
| 348 | } |
| 349 | else |
| 350 | { |
| 351 | UNEXPECTED("Unknown texture name '", Name, "'"); |
| 352 | InitData(4, 0); |
| 353 | } |
| 354 | |
| 355 | RefCntAutoPtr<Image> pImage; |
| 356 | Image::CreateFromMemory(ImgDesc, pData, &pImage); |
| 357 | VERIFY_EXPR(pImage); |
| 358 | return pImage; |
| 359 | } |
| 360 | |
| 361 | static pxr::TfToken GetDefaultTexturePath(const pxr::TfToken& Name) |
| 362 | { |