gdalalg_raster_viewshed.h

/******************************************************************************
 *
 * Project:  GDAL
 * Purpose:  gdal "raster viewshed" subcommand
 * Author:   Even Rouault <even dot rouault at spatialys.com>
 *
 ******************************************************************************
 * Copyright (c) 2025, Even Rouault <even dot rouault at spatialys.com>
 *
 * SPDX-License-Identifier: MIT
 ****************************************************************************/
 
#ifndef GDALALG_RASTER_VIEWSHED_INCLUDED
#define GDALALG_RASTER_VIEWSHED_INCLUDED
 
#include "gdalalg_raster_pipeline.h"
#include "viewshed/viewshed_types.h"

 
/************************************************************************/
/*                   GDALRasterViewshedAlgorithm                       */
/************************************************************************/
 
class GDALRasterViewshedAlgorithm /* non final */
    : public GDALRasterPipelineNonNativelyStreamingAlgorithm
{
  public:
    static constexpr const char *NAME = "viewshed";
    static constexpr const char *DESCRIPTION =
        "Compute the viewshed of a raster dataset.";
    static constexpr const char *HELP_URL =
        "/programs/gdal_raster_viewshed.html";
 
    explicit GDALRasterViewshedAlgorithm(bool standaloneStep = false);
 
  private:
    bool RunStep(GDALPipelineStepRunContext &ctxt) override;
 
    std::vector<double> m_observerPos{};
    gdal::viewshed::Options m_opts{};
 
    std::string m_outputMode = "normal";
    int m_band = 1;
    int m_numThreads = 3;
 
    // Work variables
    std::string m_numThreadsStr{};
};
 
/************************************************************************/
/*                GDALRasterViewshedAlgorithmStandalone                 */
/************************************************************************/
 
class GDALRasterViewshedAlgorithmStandalone final
    : public GDALRasterViewshedAlgorithm
{
  public:
    GDALRasterViewshedAlgorithmStandalone()
        : GDALRasterViewshedAlgorithm(/* standaloneStep = */ true)
    {
    }
 
    ~GDALRasterViewshedAlgorithmStandalone() override;
};

 
#endif