示例代码：

var aCanvas=wx.createCanvas();

        aCanvas.width=SCREEN_WIDTH;

        aCanvas.height=SCREEN_HEIGHT;

        var canvas2d=aCanvas.getContext('2d');

        var ctxImageData = canvas2d.createImageData(SCREEN_WIDTH,SCREEN_HEIGHT);

        ctxImageData.data.set(new Uint8Array(framebuffer_u8));

        canvas2d.putImageData(ctxImageData, 0, 0);  

        var myTexture2D =new cc.Texture2D();

        myTexture2D.initWithElement(aCanvas);

        var sprite = that.game.getComponent(cc.Sprite);

        var sp=new cc.SpriteFrame();

        sp.setTexture(myTexture2D);

        sprite.spriteFrame=sp;