Method allocate

src/opengl_depth_packet_processor.cpp:315–341

  }

  void allocate(size_t new_width, size_t new_height)
  {
    if (size)
      return;

    GLint max_size;
    glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE, &max_size);
    if (new_width > (size_t)max_size || new_height > (size_t)max_size)
    {
      LOG_ERROR << "GL_MAX_RECTANGLE_TEXTURE_SIZE is too small: " << max_size;
      exit(-1);
    }

    width = new_width;
    height = new_height;
    size = height * width * bytes_per_pixel;
    data = new unsigned char[size];

    glGenTextures(1, &texture);
    bindToUnit(GL_TEXTURE0);
    glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
    glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexImage2D(GL_TEXTURE_RECTANGLE, 0, FormatT::InternalFormat, width, height, 0, FormatT::Format, FormatT::Type, 0);
    CHECKGL();
  }

  void upload()
  {