gdalalg_vector_buffer.h

/******************************************************************************
 *
 * Project:  GDAL
 * Purpose:  "gdal vector buffer"
 * 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_VECTOR_BUFFER_INCLUDED
#define GDALALG_VECTOR_BUFFER_INCLUDED
 
#include "gdalalg_vector_geom.h"

 
/************************************************************************/
/*                    GDALVectorBufferAlgorithm                         */
/************************************************************************/
 
class GDALVectorBufferAlgorithm /* non final */
    : public GDALVectorGeomAbstractAlgorithm
{
  public:
    static constexpr const char *NAME = "buffer";
    static constexpr const char *DESCRIPTION =
        "Compute a buffer around geometries of a vector dataset.";
    static constexpr const char *HELP_URL = "/programs/gdal_vector_buffer.html";
 
    struct Options : public GDALVectorGeomAbstractAlgorithm::OptionsBase
    {
        double m_distance = 0;
        std::string m_endCapStyle = "round";
        std::string m_joinStyle = "round";
        double m_mitreLimit = 5;
        int m_quadrantSegments = 8;
        std::string m_side = "both";
    };
 
    std::unique_ptr<OGRLayerWithTranslateFeature>
    CreateAlgLayer(OGRLayer &srcLayer) override;
 
    explicit GDALVectorBufferAlgorithm(bool standaloneStep = false);
 
  private:
    bool RunStep(GDALPipelineStepRunContext &ctxt) override;
 
    Options m_opts{};
};
 
/************************************************************************/
/*                    GDALVectorBufferAlgorithmStandalone               */
/************************************************************************/
 
class GDALVectorBufferAlgorithmStandalone final
    : public GDALVectorBufferAlgorithm
{
  public:
    GDALVectorBufferAlgorithmStandalone()
        : GDALVectorBufferAlgorithm(/* standaloneStep = */ true)
    {
    }
 
    ~GDALVectorBufferAlgorithmStandalone() override;
};

 
#endif /* GDALALG_VECTOR_BUFFER_INCLUDED */