用于计算字体上伸的方法。
上伸是指从字体的基线到顶线的距离。字体设计者会在不同字体的指标中定义此距离:有些字体将使用包围盒高度,有些将使用胶囊体高度,还有些将充当重音符号等变音符号。由于这些不同之处可能会影响文本的垂直对齐,因此 Unity 提供多种可确定上伸值已在内部使用的方法。
请参阅 https://en.wikipedia.org/wiki/Typeface#Font_metrics 了解关于上伸和字体指标的其他信息。
Legacy2x | 旧包围盒方法。 |
FaceAscender | 上伸程序方法。 |
FaceBoundingBox | 包围盒方法。 |
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