Method initializeProcess

isis/src/base/objs/ImageExporter/ImageExporter.cpp:255–297

* Sets up the export process with the parameters described within the given * description. * * This method determines determines whether to write the data as grayscale, * RGB, or RGBA. It then opens a cube for retrieving the input data and * establishing the dimensions of the output image. Next, the ProcessExport * format is set to BIL and the ProcessExport output pixel type, out

   * @return A cube pointer to the first channel created, owned by the process
   */
  Cube *ImageExporter::initializeProcess() {
    switch (m_exportDescription->channelCount()) {
      case 1:
        m_writeMethod = &ImageExporter::writeGrayscale;
        break;
      case 3:
        m_writeMethod = &ImageExporter::writeRgb;
        break;
      case 4:
        m_writeMethod = &ImageExporter::writeRgba;
        break;
      default:
        throw IException(IException::Programmer,
            "Cannot export an image with [" + QString::number(m_exportDescription->channelCount()) +
            "] channels",
            _FILEINFO_);
    }

    ProcessExport &p = process();
    Cube *cube = addChannel(0);
    m_samples = cube->sampleCount();
    m_lines = cube->lineCount();
    m_bands = m_exportDescription->channelCount();

    for (int i = 1; i < m_exportDescription->channelCount(); i++) addChannel(i);

    p.setFormat(ProcessExport::BIL);// why BIL and not default to BSQ??? Doesn't appear to make a
                                    // difference in output images

    // set up the output pixel type, special pixels and valid output range for
    // the stretch that will be performed by ProcessExport
    p.SetOutputType(exportDescription().pixelType());
    p.SetOutputRange(m_exportDescription->outputPixelValidMin(),
                     m_exportDescription->outputPixelValidMax());

    // the dafault value for the null
    p.SetOutputNull(m_exportDescription->outputPixelNull());

    // set the absolute min/max values for all pixels (including specials) in the output image
    setOutputPixelRange(m_exportDescription->outputPixelAbsoluteMin(),
                        m_exportDescription->outputPixelAbsoluteMax());
    return cube;
  }


  /**