public virtual void BindTexture(uint target, WebGLTexture texture)
 {
 }
 public virtual void FramebufferTexture2D(uint target, uint attachment, uint textarget, WebGLTexture texture, int level)
 {
 }
 public virtual bool IsTexture(WebGLTexture texture)
 {
     return(false);
 }
 public virtual void DeleteTexture(WebGLTexture texture)
 {
 }