适用于 TrueTypeFontImporter 的字体渲染模式常量。
| Smooth | 使用抗锯齿字体渲染。使用动态字体时，这是渲染字体纹理最快的模式。 |
| HintedSmooth | Use Anti-Aliased Font rendering with hinting. This forces character lines to run along pixel boundaries. |
| HintedRaster | Use hinted font rendering without anti-aliasing. This is the crispest font rendering option, and may be most readable for small font sizes. |
| OSDefault | Use the OS default font rendering mode. This mode is only available for dynamic fonts, as static fonts are generated at build time. |