如何从 html 画布中取消绘制、隐藏、删除或删除图像?
this.context.drawImage(myimage, 0, 0);
将图像放在画布上已经很好地覆盖了整个网络.但是出现后如何删除呢?
Putting the image on the canvas is pretty well covered all over the web. But how do I remove it after it's there?
推荐答案
选项1:
在其上绘制一个与背景颜色相同的矩形.
Option 1:
Draw a rectangle over it of the same color as the background.
选项 2(适用于非平凡背景，但速度较慢):
在绘图前从画布中获取像素数据图像，然后重绘该像素数据以移除图像.
Option 2 (works for non-trivial background, but slower):
Get the pixel data from the canvas before drawing the image, then redraw that pixel data to remove the image.
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