For example, if this property equals 1, the custom cap width is 10, the custom cap height is 5, and a line is drawn with a pen with a width of 3, then the cap is drawn 30 units wide and 15 units high.
例如，如果该属性等于1，自定义线帽宽度为10，自定义线帽高度为5，并且用宽度为3的钢笔绘制直线，则所绘制的线帽有30个单位宽、15个单位高。
For example, if this property equals 1, the custom cap width is 10, the custom cap height is 5, and a line is drawn with a pen with a width of 3, then the cap is drawn 30 units wide and 15 units high.
例如，如果该属性等于1，自定义线帽宽度为10，自定义线帽高度为5，并且用宽度为3的钢笔绘制直线，则所绘制的线帽有30个单位宽、15个单位高。
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