fix(ass): Fontsize乘1.35补偿系数对齐CSS预览字号 #1516

Merged
xiaoxia merged 2 commits from fix/ass-fontsize-compensation-1.35 into develop 2026-08-27 01:44:20 +08:00

2 Commits

Author SHA1 Message Date
xiaoxia 2531b0e1fd fix(ass): 修复ruff E741模糊变量名 l→line
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2026-08-27 01:19:45 +08:00
xiaoxia 187a5278a6 fix(ass): Fontsize乘1.35补偿系数对齐CSS预览字号
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ASS Fontsize 是字体 em-square 高度(含 Latin 升降部留白),
中文字符实际只占声明字号的约 65%~75%,而浏览器 CSS font-size
让中文字符占满声明高度,导致预览标题比成片标题大约 35%。

- 新增 ASS_FONTSIZE_COMPENSATION=1.35 与 _compensate_ass_fontsize()
- build_ass_style 写入 ASS Style Fontsize 时乘补偿系数(title+subtitle 均生效)
- _wrap_title_text 换行宽度同步使用补偿后字号,避免换行位置错位
- 实测:font_size=89 → ASS Fontsize=120 → 中文字高约 78~85px,与 CSS 一致
- 同步更新相关单测,新增补偿系数专项测试(4 例)
2026-08-27 01:05:45 +08:00