fix: 解决文本垂直居中对齐出错问题 #144
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fix: 解决文本垂直居中对齐出错问题 #144
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出错原因为：SetTextAlign() 没有垂直居中对齐的选项，只有水平居中对齐，因此要使用 TextOut() 实现文本垂直居中对齐输出，需要自行计算文本偏移。而代码中计算偏移时仅使文本朝 y 负方向偏移 1/2 的文本高度，没有考虑文本发生旋转，角度不为 0° 的情况。 |
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在文字对齐方式设置为垂直居中时，如果文本输出方向并非为水平从左到右（即 角度为 0°），会出现文本对齐错误、文本发生偏移的情况。