anchor.diff:          glkRect(0, 0, aWidth, aHeight);
         glEnd;
       end;
  -
  -  glPopMatrix;
  +  finally
  +    glPopMatrix;
  +  end;
   end;
   
   
  
positive.code:         glVertex2f(aWidth-0.5, 0.5);
        glEnd;
      end;
    glPopMatrix;
  end;
  
  
  
negative.code:   TRender.BindTexture(0);
  
    glPushAttrib(GL_LINE_BIT);
    try
      glLineWidth(aLineWidth);
      glColor4ubv(@Col);
      glBegin(GL_LINE_LOOP);
        glkRect(aLeft + aLineWidth / 2, aTop + aLineWidth / 2, aLeft + aWidth - aLineWidth / 2, aTop + aHeight - aLineWidth / 2);
      glEnd;
    finally
      glPopAttrib;
    end;
  end;
  
  
  