void init(GlContext glContext, Texture texture) {
this.glContext = glContext;
this.width = glContext.getWidth();
this.height = glContext.getHeight();
this.rootFrameBuffer = FrameBuffer.obtain(texture);
}
void init(GlContext glContext, int externalRootFrameBuffer) {
this.glContext = glContext;
this.width = glContext.getWidth();
this.height = glContext.getHeight();
this.externalRootFrameBuffer = externalRootFrameBuffer;
}
