Method DisplayBuffer

Rendering/OpenGL2/vtkOpenGLFramebufferObject.cxx:1136–1203

------------------------------------------------------------------------------ Description: Display any buffer (convert value into string).

// Description:
// Display any buffer (convert value into string).
void vtkOpenGLFramebufferObject::DisplayBuffer(int value)
{
  if (value >= GL_COLOR_ATTACHMENT0 && value <= GL_COLOR_ATTACHMENT0 + 15)
  {
    std::cout << "GL_COLOR_ATTACHMENT" << (value - GL_COLOR_ATTACHMENT0);
  }
  else
  {
#ifdef GL_ES_VERSION_3_0
    vtkErrorMacro("Attempt to use bad display destination");
#else
    if (value >= GL_AUX0)
    {
      int b = value - GL_AUX0;
      GLint ivalue;
      glGetIntegerv(GL_AUX_BUFFERS, &ivalue);
      if (b < ivalue)
      {
        std::cout << "GL_AUX" << b;
      }
      else
      {
        std::cout << "invalid aux buffer: " << b << ", upper limit is " << (ivalue - 1)
                  << ", raw value is 0x" << std::hex << (GL_AUX0 + b) << std::dec;
      }
    }
    else
    {
      switch (value)
      {
        case GL_NONE:
          std::cout << "GL_NONE";
          break;
        case GL_FRONT_LEFT:
          std::cout << "GL_FRONT_LEFT";
          break;
        case GL_FRONT_RIGHT:
          std::cout << "GL_FRONT_RIGHT";
          break;
        case GL_BACK_LEFT:
          std::cout << "GL_BACK_LEFT";
          break;
        case GL_BACK_RIGHT:
          std::cout << "GL_BACK_RIGHT";
          break;
        case GL_FRONT:
          std::cout << "GL_FRONT";
          break;
        case GL_BACK:
          std::cout << "GL_BACK";
          break;
        case GL_LEFT:
          std::cout << "GL_LEFT";
          break;
        case GL_RIGHT:
          std::cout << "GL_RIGHT";
          break;
        case GL_FRONT_AND_BACK: