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1 parent d6b355f commit bb97fbdCopy full SHA for bb97fbd
docs/canvas.md
@@ -502,7 +502,7 @@ function drawImageActualSize() {
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ctx.getImageData(sx, sy, sw, sh)
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```
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-`getImageData()`方法接受四个参数。`sx`和`sy`是读取区域的左上角坐标,`sw`和`sy`是读取区域的宽度和高度。如果想要读取整个`<canvas>`区域,可以写成下面这样。
+`getImageData()`方法接受四个参数。`sx`和`sy`是读取区域的左上角坐标,`sw`和`sh`是读取区域的宽度和高度。如果想要读取整个`<canvas>`区域,可以写成下面这样。
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```javascript
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var canvas = document.getElementById('myCanvas');
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