Method convert

src/platform/linux/graphics.cpp:959–989

  }

  int sws_t::convert(gl::frame_buf_t &fb) {
    gl::ctx.BindTexture(GL_TEXTURE_2D, loaded_texture);

    GLenum attachments[] {
      GL_COLOR_ATTACHMENT0,
      GL_COLOR_ATTACHMENT1
    };

    for (int x = 0; x < sizeof(attachments) / sizeof(decltype(attachments[0])); ++x) {
      gl::ctx.BindFramebuffer(GL_FRAMEBUFFER, fb[x]);
      gl::ctx.DrawBuffers(1, &attachments[x]);

#ifndef NDEBUG
      auto status = gl::ctx.CheckFramebufferStatus(GL_FRAMEBUFFER);
      if (status != GL_FRAMEBUFFER_COMPLETE) {
        BOOST_LOG(error) << "Pass "sv << x << ": CheckFramebufferStatus() --> [0x"sv << util::hex(status).to_string_view() << ']';
        return -1;
      }
#endif

      gl::ctx.UseProgram(program[x].handle());
      gl::ctx.Viewport(offsetX / (x + 1), offsetY / (x + 1), out_width / (x + 1), out_height / (x + 1));
      gl::ctx.DrawArrays(GL_TRIANGLES, 0, 3);
    }

    gl::ctx.BindTexture(GL_TEXTURE_2D, 0);

    gl::ctx.Flush();

    return 0;
  }
}  // namespace egl

void free_frame(AVFrame *frame) {