为啥读图片的rgb的数据全是0

[758482981 (谁睡觉叫)]

按照上述代码操作，版本2.4.3(upload://4sjurMk4xocQHBZsIwUMecNp9Rk.png)

[758482981 (谁睡觉叫)]

@toddlxt

[758482981 (谁睡觉叫)]

let rt2 = new cc.RenderTexture();
rt2.initWithSize(this.tex2.width, this.tex2.height);
cc.renderer.device.setFrameBuffer(rt2._framebuffer);
rt2.drawTextureAt(this.tex2, 0, 0);

let data2 = rt2.readPixels();
console.log(data2, rt2);

已解决