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用 canvas 的 getImageData 做点有趣的事

 5 years ago
source link: https://juejin.im/post/5ba06596f265da0acc7957e4
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说明 canvas元素标签强大之处在于可以直接在HTML上进行图形操作，具有极大的应用价值。 canvas 可以实现对图像的像素操作，这就要说到 getImageData() 方法了。 解释 CanvasRenderingContext2D.getImag

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