wx.canvasPutImageData怎么样实时显示图片，图片是websocket发送过来的数据，显示出来是花屏，有人知道吗？
wx.onSocketMessage(function(res) {
wx.canvasGetImageData({
canvasId: 'video',
x: 0,
y: 0,
width: 200,
height: 200,
success(rs) {


# res.data 是webscoket 传过来的 ArrayBuffer
let pixels = rs.data;

var buffer = new Uint8Array(res.data);
for (var i = 0; i < pixels.length; i++) {
pixels[i] = buffer[i];
}
wx.canvasPutImageData({
canvasId: 'video',
data: pixels,
x: 0,
y: 0,
width: 200,
height: 200
})
},
fail(res) {
console.log(res)
}


})
})

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