width | 字形的宽度。 |
height | 字形的高度。 |
bearingX | 水平 bearingX。 |
bearingY | 水平 bearingY。 |
advance | 水平前进。 |
构造一个新的 GlyphMetrics 结构。
水平 bearingX,表示从当前绘制位置(原点)相对于元素左包围盒边缘 (bbox) 的距离。
水平 bearingY,表示从当前绘制位置(原点)相对于元素顶部包围盒边缘 (bbox) 的距离。这表示文本元素的顶部。
水平前进,表示相对于文本元素原点的绘制位置增加(从左到右)或减小(从右到左)的距离。这表示下一个文本元素的原点。
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