// Copyright (c) 2022, ETH Zurich and UNC Chapel Hill.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//
//     * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
//       its contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)

#ifndef COLMAP_SRC_UI_TRIANGLE_PAINTER_H_
#define COLMAP_SRC_UI_TRIANGLE_PAINTER_H_

#include <QtCore>
#include <QtOpenGL>

#include "ui/point_painter.h"

namespace colmap {

class TrianglePainter {
 public:
  TrianglePainter();
  ~TrianglePainter();

  struct Data {
    Data() {}
    Data(const PointPainter::Data& p1, const PointPainter::Data& p2,
         const PointPainter::Data& p3)
        : point1(p1), point2(p2), point3(p3) {}

    PointPainter::Data point1;
    PointPainter::Data point2;
    PointPainter::Data point3;
  };

  void Setup();
  void Upload(const std::vector<TrianglePainter::Data>& data);
  void Render(const QMatrix4x4& pmv_matrix);

 private:
  QOpenGLShaderProgram shader_program_;
  QOpenGLVertexArrayObject vao_;
  QOpenGLBuffer vbo_;

  size_t num_geoms_;
};

}  // namespace colmap

#endif  // COLMAP_SRC_UI_TRIANGLE_PAINTER_H_