method resize

Source

void resize(int width, int height) {

  if (_width != width || _height != height) {

    _width = width;
    _height = height;

    if (_renderContext == null || _renderbuffer == null) return;
    if (_renderContext.contextIdentifier != contextIdentifier) return;

    _renderContext.activateRenderStencilBuffer(this);
    _renderingContext.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_STENCIL, _width, _height);
  }
}