This project is building for merge ttf font file with custom code point mapping. Basicly, it supply two cp-mapping mode: zh2Hans and zh2Hant.
Assume that you already got two fonts: Font-Hans.ttf for Simplified Chinese, and Font-Hant for Traditional Chinese.
You can simplely input command to merge all Traditional Chinese characters into font file as Simplified Chinese code point:
python merge-font.py Font-Hans.ttf Font-Hant.ttf Hant2Hans output.ttf
In oppsite, you can simplely input command to merge all Simplified Chinese characters into font file as Traditional Chinese code point:
python merge-font.py Font-Hant.ttf Font-Hans.ttf Hans2Hant output.ttf
What's more, there are two extra modes Hans and Hant mode, which means all Simplified/Traditional Chinese characters will be merged to base.
You can pass cmap version list. By default, all version of cmap will be updated during insertion.
--cmap 12
--cmap 4,12
You can pass --optimize if you want to make your font smaller. This option will remove all empty glyphs from cmap list.
Some fonts contains to much code point in low versioned cmap list such as cmap_format_4. So font merge may got crashed when trying insert new cmap. If you have this kind of problem, try use --optimize option and try again. If the problem is still, try use --cmap option to pass specific cmap versions and try again.