// 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_POINT_PAINTER_H_
#define COLMAP_SRC_UI_POINT_PAINTER_H_

#include <QtCore>
#include <QtOpenGL>

namespace colmap {

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

  struct Data {
    Data() : x(0), y(0), z(0), r(0), g(0), b(0), a(0) {}
    Data(const float x_, const float y_, const float z_, const float r_,
         const float g_, const float b_, const float a_)
        : x(x_), y(y_), z(z_), r(r_), g(g_), b(b_), a(a_) {}

    float x, y, z;
    float r, g, b, a;
  };

  void Setup();
  void Upload(const std::vector<PointPainter::Data>& data);
  void Render(const QMatrix4x4& pmv_matrix, const float point_size);

 private:
  QOpenGLShaderProgram shader_program_;
  QOpenGLVertexArrayObject vao_;
  QOpenGLBuffer vbo_;

  size_t num_geoms_;
};

}  // namespace colmap

#endif  // COLMAP_SRC_UI_POINT_PAINTER_H_