| 388 | } |
| 389 | |
| 390 | static bool ValidateSparseAccessorsForUnpack(Scene* scene, cgltf_data* data) |
| 391 | { |
| 392 | for (cgltf_size i = 0; i < data->accessors_count; ++i) |
| 393 | { |
| 394 | cgltf_accessor* accessor = &data->accessors[i]; |
| 395 | if (!accessor->is_sparse) |
| 396 | continue; |
| 397 | |
| 398 | cgltf_size element_size = cgltf_calc_size(accessor->type, accessor->component_type); |
| 399 | if (element_size == 0) |
| 400 | { |
| 401 | SetLoadError(scene, "Invalid sparse accessor component type."); |
| 402 | return false; |
| 403 | } |
| 404 | |
| 405 | if (accessor->buffer_view && accessor->count > 0) |
| 406 | { |
| 407 | cgltf_size req_size = accessor->offset + accessor->stride * (accessor->count - 1) + element_size; |
| 408 | if (accessor->buffer_view->size < req_size) |
| 409 | { |
| 410 | SetLoadError(scene, "Sparse accessor base buffer view is too short."); |
| 411 | return false; |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | cgltf_accessor_sparse* sparse = &accessor->sparse; |
| 416 | cgltf_size index_component_size = cgltf_component_size(sparse->indices_component_type); |
| 417 | if (index_component_size == 0 || !sparse->indices_buffer_view || !sparse->values_buffer_view) |
| 418 | { |
| 419 | SetLoadError(scene, "Invalid sparse accessor indices or values."); |
| 420 | return false; |
| 421 | } |
| 422 | |
| 423 | cgltf_size indices_req_size = sparse->indices_byte_offset + index_component_size * sparse->count; |
| 424 | cgltf_size values_req_size = sparse->values_byte_offset + element_size * sparse->count; |
| 425 | if (sparse->indices_buffer_view->size < indices_req_size || |
| 426 | sparse->values_buffer_view->size < values_req_size) |
| 427 | { |
| 428 | SetLoadError(scene, "Sparse accessor buffer view is too short."); |
| 429 | return false; |
| 430 | } |
| 431 | |
| 432 | const uint8_t* index_data = cgltf_buffer_view_data(sparse->indices_buffer_view); |
| 433 | const uint8_t* values_data = cgltf_buffer_view_data(sparse->values_buffer_view); |
| 434 | if (!index_data || !values_data) |
| 435 | { |
| 436 | SetLoadError(scene, "Sparse accessor buffer data is missing."); |
| 437 | return false; |
| 438 | } |
| 439 | |
| 440 | index_data += sparse->indices_byte_offset; |
| 441 | for (cgltf_size j = 0; j < sparse->count; ++j, index_data += index_component_size) |
| 442 | { |
| 443 | cgltf_size sparse_index = 0; |
| 444 | if (!ReadSparseIndex(index_data, sparse->indices_component_type, &sparse_index) || |
| 445 | sparse_index >= accessor->count) |
| 446 | { |
| 447 | SetLoadError(scene, "Sparse accessor index is out of range."); |
no test coverage detected