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| 376 | |
| 377 | //------------------------------------------------------------------------------ |
| 378 | void vtkTIFFReader::ExecuteInformation() |
| 379 | { |
| 380 | this->Initialize(); |
| 381 | this->ComputeInternalFileName(this->DataExtent[4]); |
| 382 | if (this->InternalFileName == nullptr) |
| 383 | { |
| 384 | vtkErrorMacro("Need to specify a filename"); |
| 385 | this->SetErrorCode(vtkErrorCode::NoFileNameError); |
| 386 | return; |
| 387 | } |
| 388 | |
| 389 | if (!this->InternalImage->Open(this->InternalFileName)) |
| 390 | { |
| 391 | vtkErrorMacro("Unable to open file " |
| 392 | << this->InternalFileName << " Reason: " << vtksys::SystemTools::GetLastSystemError()); |
| 393 | this->SetErrorCode(vtkErrorCode::CannotOpenFileError); |
| 394 | this->DataExtent[0] = 0; |
| 395 | this->DataExtent[1] = 0; |
| 396 | this->DataExtent[2] = 0; |
| 397 | this->DataExtent[3] = 0; |
| 398 | this->DataExtent[4] = 0; |
| 399 | this->DataExtent[5] = 0; |
| 400 | this->SetNumberOfScalarComponents(1); |
| 401 | this->vtkImageReader2::ExecuteInformation(); |
| 402 | return; |
| 403 | } |
| 404 | |
| 405 | // If orientation information is provided, overwrite the value |
| 406 | // read from the tiff image |
| 407 | if (this->OrientationTypeSpecifiedFlag) |
| 408 | { |
| 409 | this->InternalImage->Orientation = OrientationType; |
| 410 | } |
| 411 | |
| 412 | if (!SpacingSpecifiedFlag) |
| 413 | { |
| 414 | this->DataSpacing[0] = 1.0; |
| 415 | this->DataSpacing[1] = 1.0; |
| 416 | |
| 417 | // If we have some spacing information we use it |
| 418 | if (this->InternalImage->ResolutionUnit > 0 && this->InternalImage->XResolution > 0 && |
| 419 | this->InternalImage->YResolution > 0) |
| 420 | { |
| 421 | if (this->InternalImage->ResolutionUnit == 2) // inches |
| 422 | { |
| 423 | this->DataSpacing[0] = 25.4 / this->InternalImage->XResolution; |
| 424 | this->DataSpacing[1] = 25.4 / this->InternalImage->YResolution; |
| 425 | } |
| 426 | else if (this->InternalImage->ResolutionUnit == 3) // cm |
| 427 | { |
| 428 | this->DataSpacing[0] = 10.0 / this->InternalImage->XResolution; |
| 429 | this->DataSpacing[1] = 10.0 / this->InternalImage->YResolution; |
| 430 | } |
| 431 | // Somewhat arbitrary choice of using the X spacing as also the |
| 432 | // Z spacing. Used only with image stacks. |
| 433 | this->DataSpacing[2] = this->DataSpacing[0]; |
| 434 | } |
| 435 | } |
nothing calls this directly
no test coverage detected